CN222665231U - Offshore wind generating set hoisting system - Google Patents

Abstract

The present invention provides an offshore wind turbine generator set hoisting system, the offshore wind turbine generator set comprising a tower, the offshore wind turbine generator set hoisting system comprising a hoist, the hoist comprising a hoist bracket, a hoisting winch and a hoisting rope, the hoisting winch is used to provide hoisting power, the output end of the hoisting winch is connected to a hoisting drum, the hoisting rope is wound around the hoisting drum, a hoisting point is arranged on the top of the tower, the free end of the hoisting rope can bypass the hoisting point and be connected to the hoist bracket, so that the hoist bracket can rise from a floating crane to the top of the tower or fall from the top of the tower to the floating crane, during the hoisting of the hoist itself and the hoisting of the unit components, there is no need to occupy the installation ship, thereby saving the cost of renting the installation ship, and also reducing the assembly cost of the wind turbine generator set.

Description

Offshore wind generating set hoisting system

Technical Field

The disclosure belongs to the technical field of wind power generation, and particularly relates to a hoisting system of an offshore wind generating set.

Background

At present, the development of the offshore wind power generation technology is rapid, the unit update iteration is rapid, the large parts of the wind power generation unit are replaced, and two schemes are generally adopted:

The proposal is that the cabin is removed by using a large crane, and then the transformer is removed for replacement, and the proposal has large engineering quantity and high cost and is not adopted generally. The other scheme is that a conventional winch is arranged at the bottom of the tower, a pulley block is arranged in a cabin for replacement, and the scheme is characterized in that a large-sized installation ship is arranged at the bottom of the tower and used for supporting the winch, the replacement period of the unit is long, the installation ship is occupied for a long time, the renting cost of the installation ship is high, and the hoisting cost of the offshore unit is high.

Disclosure of utility model

The main aim of the present disclosure is to provide a hoisting system for an offshore wind turbine generator system, so as to reduce the hoisting cost of the offshore wind turbine generator system.

Aiming at the purposes, the present disclosure provides the following technical scheme:

In one aspect of the disclosure, an offshore wind turbine generator system is provided, the offshore wind turbine generator system comprises a tower, the offshore wind turbine generator system comprises a lifting appliance, the lifting appliance comprises a lifting appliance support, a lifting winch and a lifting winch rope, the lifting winch is used for providing lifting power, the output end of the lifting winch is connected with a lifting winch drum, the lifting winch rope is wound on the lifting winch drum, a lifting point is arranged at the top of the tower, and the free end of the lifting winch rope can bypass the lifting point and is connected to the lifting appliance support, so that the lifting appliance support can be lifted to the top of the tower from a floating crane ship or fall to the floating crane ship from the top of the tower.

The wind generating set further comprises a cabin arranged at the top of the tower and a unit component arranged in the cabin, the lifting appliance further comprises a connecting piece, the connecting piece is arranged on the lifting appliance support, the unit component is provided with a connecting portion matched with the connecting piece and connected with the connecting portion through the connecting piece, so that the lifting appliance is connected with the unit component, or a rear machine frame of the cabin is provided with a connecting portion matched with the connecting piece and connected with the connecting portion through the connecting piece, so that the lifting appliance is connected with the rear machine frame of the cabin.

According to another exemplary embodiment of the present disclosure, the connecting member is a telescopic member, a fixed end of the telescopic member is connected to the hanger bracket, and an extended end of the telescopic member can extend with respect to the hanger bracket so as to be connectable with the connecting portion.

Optionally, the telescopic members are arranged in pairs and at intervals, and the extending ends of the telescopic members face each other, or the offshore wind turbine generator system hoisting system further comprises a sensor and a controller, wherein the sensor is used for detecting the relative positions of the connecting part and the connecting part, and when the connecting part reaches a preset position relative to the connecting part, the controller can control the connecting part to be inserted into the connecting part.

Specifically, wind generating set still including set up in cabin and the unit part of installing in the cabin at pylon top, hoist still include the connecting piece, the connecting piece set up in the hoist support, the lateral wall of pylon be provided with connecting piece matched connection portion, through the connecting piece with connecting portion connect, make the hoist with the lateral wall of pylon is connected.

Further, the connecting piece is a torsion lock, the torsion lock can rotate between an unlocking position and a locking position, the connecting portion is a pin hole matched with the torsion lock, and when the torsion lock is inserted into the pin hole and adjusted to the locking position, the lifting appliance is connected to the connecting portion.

According to another exemplary embodiment of the present disclosure, the offshore wind turbine further comprises a nacelle mounted on the top end of the tower, a nacelle rear frame, and a plurality of unit components mounted on the nacelle rear frame, the offshore wind turbine hoisting system further comprises a hoisting point, and a hoisting winch hoisting rope of the hoisting winch can bypass the hoisting point, wherein the hoisting point is arranged on the nacelle rear frame, or the offshore hoisting system further comprises a top hanger for being connected to the nacelle rear frame, and the hoisting point is arranged on the top hanger.

Optionally, the offshore hoisting system further comprises a wind device, through which the spreader is connected to the floating vessel.

Specifically, the cable wind device comprises a frame structure, a movable winch, a guide pulley block and a universal pulley block, wherein the movable winch is movably connected to the frame structure, the guide pulley block is rotatably connected to the frame structure, the guide pulley block is located above the movable winch, the universal pulley block is rotatably arranged on the frame structure, the universal pulley block is located on one side of the guide pulley block, facing the lifting device support, a tail pulley block is arranged on the lifting device support, one end of a cable wind rope is wound on a cable wind winch drum of the movable winch, and the other end of the cable wind rope sequentially bypasses the guide pulley block and the universal pulley block and then is connected with the tail pulley block.

Further, the cable wind device further comprises a universal pulley bracket, the universal pulley bracket is arranged at the top of the frame structure and protrudes towards one side of the lifting appliance bracket to extend, the universal pulley bracket is provided with a limiting through hole, and the cable wind rope penetrates through the limiting through hole from the guide pulley block and is wound on the universal pulley block.

In another exemplary embodiment of the present disclosure, the offshore wind turbine hoisting system further comprises a boom disposed on the hoist support, one end of the boom is pivotally connected to the hoist support, the boom is capable of being pivotally folded over the hoist support and pivotally unfolded relative to the hoist support, and the boom is a telescopic boom.

Optionally, the wind generating set further comprises a nacelle arranged on top of the tower, the nacelle being capable of yawing anticlockwise by a first predetermined angle, the boom being capable of yawing clockwise by a second predetermined angle with respect to the spreader support, such that the boom is capable of lowering the set component onto a transport vessel or lifting the set component from a transport vessel, or the nacelle being capable of yawing clockwise by a third predetermined angle, the boom being capable of yawing anticlockwise by a fourth predetermined angle with respect to the spreader support, such that the boom is capable of lowering the set component onto a transport vessel or lifting the set component from a transport vessel.

Specifically, the hoist still including rotationally connect in first upset assembly pulley, first bear the main pulley, second stands up assembly pulley, cabin fixed pulley, lift by crane assembly pulley, second bear the main pulley on the hoist support, wherein, lift by crane the winch set up in the first end of hoist support, first bear the main pulley set up in the top of the second end of hoist support, first upset assembly pulley set up in the top of hoist support and interval arrange in lift by crane the winch with first bear between the main pulley, cabin fixed pulley with lift by crane the assembly pulley set up in the second end of hoist support, just cabin fixed pulley is located first below that bears the main pulley, lift by crane the assembly pulley is located the below of cabin fixed pulley, the free end that lifts by crane the hoist rope passes through first upset assembly pulley to twine in proper order first bear the main pulley second stands up the fixed pulley, lift by crane the cabin fixed pulley, second bear the main pulley.

Further, the assembly component includes a generator, or a transformer, or a gearbox, or blades, or an impeller.

The offshore wind turbine generator system hoisting system has the advantages that the offshore wind turbine generator system hoisting system can hoist the crane to the top of the tower, and the crane can hoist the crane and the unit components without occupying a mounting ship, so that the cost of renting and mounting the ship is saved, and the assembly cost of the wind turbine generator system is reduced.

Drawings

The foregoing and/or other objects and advantages of the disclosure will become more apparent from the following description of embodiments taken in conjunction with the accompanying drawings in which:

Fig. 1 is a block diagram of a hoisting system for an offshore wind turbine generator system according to a first exemplary embodiment of the present disclosure.

Fig. 2 is a structural view of the spreader of fig. 1.

Fig. 3 is a block diagram of a top pylon in an offshore wind turbine generator system lifting system provided by a second exemplary embodiment of the present disclosure.

Fig. 4 is a schematic diagram of a hoisting system for an offshore wind turbine generator set according to a third exemplary embodiment of the disclosure.

Fig. 5 is a state diagram of the use of the offshore wind turbine hoisting system of fig. 4.

Fig. 6 is a block diagram showing the arrangement of the wind power plant and the spreader of fig. 4 on a floating vessel.

Fig. 7 is a front view of the guy apparatus and spreader of fig. 6.

Fig. 8 is an enlarged view of a portion of the left end structure of the spreader of fig. 7.

Fig. 9 is a frame construction diagram of the cable wind device of fig. 6.

Fig. 10 is a front view of the frame structure of the cable wind device of fig. 9.

Fig. 11 is a top view of the frame structure of the cable wind device of fig. 9.

Fig. 12 is a block diagram of the boom and boom bracket of fig. 6.

Reference numerals illustrate:

1. a lifting appliance bracket, a top lifting bracket;

3. Hoisting winch;

5. A floating crane ship, 6, a guide wheel;

7. a hanging point, a connecting piece and a connecting piece;

9. 10, lifting appliance;

11. An anti-collision wheel, a cable wind device;

13. a cable rope, 14, a suspension arm;

15. a boom support, 16, a boom drive;

21. Hanger cantilever, 22, hanger telescopic piece;

23. 24, hanging frame hanging ropes;

101. a fixed pulley in the cabin;

104. 106, a first bearing main pulley;

107. 108, a second bearing main pulley;

112. 113, hoisting pulley blocks;

201. 202, limiting through holes;

203. 206, moving a winch and guiding a pulley block;

207. And 208, a universal pulley bracket and a universal pulley block.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. However, the embodiments of the present disclosure should not be construed as limited to the embodiments set forth herein. The same reference numerals in the drawings denote the same or similar structures, and thus detailed descriptions thereof will be omitted.

Referring to fig. 1 to 3, the present disclosure provides a lifting system for an offshore wind turbine generator system, which is suitable for an offshore wind turbine generator system and is used for assisting in lifting of turbine generator components in the process of dismounting and replacing the offshore wind turbine generator system. As the load of offshore wind turbines is continuously increased, the size of the components of the turbines is also increasing.

The offshore wind power generation unit comprises a tower 9, a cabin arranged on the tower 9, and unit components arranged in the cabin, wherein the unit components comprise a transformer at the top of the cabin, a gear box, blades, impellers and the like, but are not limited to the above. For convenience of description, the embodiment uses the transformer of the offshore wind turbine generator system hoisting system for replacing the top of the nacelle as an example, but is not limited thereto.

The offshore wind turbine hoisting system comprises a hoisting tool 10, a hoisting point 7 is arranged at the top of a tower 9, the hoisting point 7 is used for supporting a hoisting rope 3 (described below) of the hoisting tool 10, the offshore wind turbine hoisting system is supported by the hoisting point 7 and can hoist heavy objects, and the heavy objects can be the machine set components or the hoisting tool 10 itself, but not limited to the hoisting tool.

Referring to fig. 2, the lifting appliance 10 in this embodiment comprises a lifting appliance bracket 1, a lifting winch 4 and a lifting winch rope 3, the lifting winch 4 being connected to the lifting appliance bracket 1 for providing lifting power. The output end of the hoisting winch 4 is connected with a hoisting winch drum, the hoisting winch rope 3 is wound on the hoisting winch drum, and when the hoisting winch 4 is started, the hoisting winch drum can be driven to rotate, so that the hoisting winch rope 3 is wound on the hoisting winch drum to realize rope collection of the hoisting winch rope 3, or is separated from the hoisting winch drum to realize rope unreeling of the hoisting winch rope 3.

As an example, the hoist rope 3 is wound around the hoist drum when the hoist drum rotates clockwise, and the hoist rope 3 may be separated from the hoist drum when the hoist drum rotates counterclockwise.

As an example, after the hoisting winch 4 is started, when the hoisting winch drum rotates clockwise, the hoisting winch drum rotates under the drive of the output end of the hoisting winch 4, so that the hoisting winch rope 3 is wound on the hoisting winch drum to realize rope collection of the hoisting winch rope 3, and at this time, a heavy object carried on the hoisting winch rope 3 can rise along with rope collection of the hoisting winch rope 3. When the lifting winch drum rotates anticlockwise, the lifting winch rope 3 is gradually separated from the lifting winch drum to realize rope releasing of the lifting winch rope 3, and at the moment, a weight carried on the lifting winch rope 3 is released along with rope releasing of the lifting winch rope 3.

The free end of the lifting winch rope 3 can bypass the lifting point 7 and be connected to the lifting appliance bracket 1, so that when the lifting winch rope 3 is reeled in, the lifting appliance 10 itself will be lifted away from the floating vessel 5, for example but not limited to, the lifting appliance 10 is lifted to the top of the tower 9, or when the lifting winch rope 3 is unreeled, the lifting appliance 10 itself will be lowered, so that the lifting appliance 10 does not need to occupy the installation vessel for a long time when being used for lifting heavy objects, thereby reducing the lease cost of the installation vessel and the assembly cost of the offshore wind generating set.

In this embodiment, the hoisting winch 3 of the hoist 10 bypasses the hoisting point 7 at the top of the tower 9 and is connected to the hoist bracket 1, after the hoisting winch 4 is started, the hoisting winch 4 will drive the hoisting winch drum to rotate so as to wind the hoisting winch 3 on the hoisting winch drum, thereby realizing rope reeling of the hoisting winch 3 and enabling the hoist bracket 1 to rise from the floating vessel 5 to the top of the tower 9, or when the hoisting winch drum rotates reversely, the hoisting winch 3 can be separated from the hoisting winch drum, thereby realizing rope unreeling of the hoisting winch 3 and enabling the hoist bracket 1 to fall from the top of the tower 9 onto the floating vessel 5.

According to the offshore wind turbine generator system hoisting system, the hoisting winch rope 3 of the lifting appliance 10 bypasses the hoisting point 7 at the top of the tower 9, so that the lifting appliance 10 can be lifted by itself to be separated from the installation vessel, and the installation vessel is not required to be occupied in the process that the lifting appliance 10 is used for hoisting a heavy object, so that the lease cost of the installation vessel is saved, and the assembly cost of the offshore wind turbine generator system is reduced.

With continued reference to fig. 2, the spreader bracket 1 may be, for example, but not limited to, a frame structure. The present embodiment is described taking a hexahedral frame structure as an example of the hanger bracket 1, wherein the hoisting winch 4 is disposed in the hexahedral frame structure, but not limited thereto. In the embodiment, the lifting appliance bracket 1 of the frame structure has less material and light weight, thereby reducing the manufacturing cost of the lifting system of the offshore wind turbine generator system.

In the present embodiment, the hoisting winch 4 is described by taking a friction winch as an example, but the invention is not limited thereto.

With continued reference to fig. 2, in order to avoid collision of the spreader 10 with the tower 9 during the lifting or lowering process, a side of the spreader 10 facing the tower 9 is provided with a bump wheel 11, and the bump wheel 11 is rotatably provided at a circumferential outer side of the spreader bracket 1, but not limited thereto.

With continued reference to fig. 2, as an example, the spreader 10 further comprises a connection element 8 to facilitate connection of the spreader 10 with the tower 9 or the crew member.

In this embodiment, the connecting piece 8 may be a telescopic piece, the fixed end of which is connected to the spreader bracket 1, and the extended end of which can extend out relative to the spreader bracket 1 so as to be connected to the connecting portion of the unit component, or to the connecting portion of the cabin rear frame, so that the connection between the spreader 10 and the unit component or the cabin rear frame can be realized.

In this embodiment, the telescopic members are arranged in pairs and at intervals, and the extending ends of the telescopic members are arranged opposite to each other.

Specifically, the telescopic members are arranged in pairs, a pair of telescopic members are spaced and are arranged opposite to each other on the hanger bracket 1, and when the hanger 10 is lifted to the top of the tower 9, for example, but not limited to, the hanger bracket 1 is lifted to the lower part of the unit component, the telescopic members are located at two sides of the unit component, and the telescopic members can extend out opposite to be connected with the unit component to be replaced on the top of the tower 9, but not limited to this. So set up relatively on hoist support 1 through a pair of extensible member, when being connected with the unit part, a pair of extensible member can be located the both sides of unit part respectively, avoids the extensible member unexpected breaking away from of unit part relatively, has improved the reliability that extensible member and unit part connect.

In this embodiment, the telescopic members are arranged opposite to each other, and the telescopic end faces of a pair of telescopic members are arranged opposite to each other, and the fixed end faces away from each other, so that the extending end of one telescopic member can extend towards the direction of the other telescopic member.

As an example, the connecting member 8 in the present embodiment is horizontally disposed on the top of the hanger bracket 1, but not limited thereto. For convenience of description, the present embodiment will be described by taking the connection of the connecting member 8 to the bottom of the transformer as an example, but not limited to, the transformer is substantially in a hexahedral structure, and a plurality of connecting portions, for example, but not limited to, pin holes matching with the telescopic members, are respectively provided on two opposite sides of the bottom of the transformer in the width direction.

When the spreader 10 is moved close to the transformer, such as, but not limited to, when the spreader 10 is moved below the transformer, the telescoping members can be inserted into the pin holes to thereby effect connection of the spreader 10 and the transformer. Optionally, in this embodiment, the telescoping member stretches out approximately horizontally, and the pinhole that matches with it is approximately horizontal setting, so set up for the extending direction of telescoping member is perpendicular to the gravity of transformer, in transformer lifting or the process of lowering, avoids the hoist unexpected and the transformer that breaks away from under the action of gravity, thereby has improved the reliability of use of offshore wind turbine generator system hoist and mount system.

The present embodiment will be described taking as an example a transformer that is disassembled and lowered on top of the tower 9. In the initial state, the transformer at the top of the tower 9 is fixed on the operation platform, after the lifting appliance 10 moves up to the top of the tower 9, the lifting appliance 10 can be connected to the transformer, then the transformer is detached from the operation platform, and the lifting winch 4 is started again to move the transformer and the lifting appliance 10 downwards to the bottom of the tower together, so that the detachment and the downward transportation of the transformer can be realized. It is understood that the transformer may be a gearbox, a blade or an impeller, etc. as needed, but is not limited thereto.

In addition, the offshore wind turbine generator system hoisting system can be applied to hoisting and installing the components, and the description will be given by taking a transformer as an example. When the lifting appliance 10 is positioned on the floating crane 5, the transformer is connected with the lifting appliance 10, the lifting winch 4 is started to drive the lifting winch 3 to move by bypassing the lifting point 7 at the top of the tower 9, so that the lifting appliance 10 and the transformer are lifted, the transformer can be fixed on an operation platform when the transformer is lifted to a preset position, and then the transformer and the lifting appliance 10 are removed.

For convenience of description, in this embodiment, the installation part is provided on the unit component, and the connecting piece 8 includes an electric push rod, and the connection part on the unit component is provided with a pin hole matched with the electric push rod, so that when the lifting appliance 10 moves to a proper position below the unit component, the electric push rod can extend out and be inserted into the pin hole, thereby connecting the lifting appliance 10 to the unit component. Besides, the connecting piece 8 may be a telescopic cylinder, a screw assembly, or the like, but is not limited thereto. In this embodiment, 4 connectors 8 are provided at the top of the hanger bracket 1, and are respectively disposed at the 4 corners of the rectangle, but not limited thereto.

According to the offshore wind turbine generator system hoisting system provided by the disclosure, the extending end of the telescopic piece arranged on the lifting appliance support 1 can extend outwards relative to the lifting appliance support 1 so as to be connected with the connecting part on the turbine generator system component, so that the lifting appliance 10 and the turbine generator system component are convenient to connect, the structure is simple, the price is low, and the assembly cost of the offshore wind turbine generator system is reduced, but the offshore wind turbine generator system hoisting system is not limited to the above.

In order to improve the accuracy of the connection between the spreader 10 and the assembly parts and to improve the assembly speed, the offshore wind turbine assembly hoisting system further comprises a sensor (not shown) for detecting the relative position of the connection part and the connection member 8, so that the spreader 10 can quickly and accurately reach a predetermined position, and the connection member 8 can be quickly and accurately inserted into the pin hole, but is not limited thereto.

It will be appreciated that the telescopic members may be remotely controlled so that after the spreader 10 is lifted to a predetermined position, the telescopic members may be automatically inserted into the connection portions of the unit components, thereby reducing the manual involvement and thus lowering the lifting cost of the offshore wind turbine.

In order to improve the automation capability of the offshore wind turbine hoisting system and reduce the labor cost, the offshore wind turbine hoisting system further comprises a controller (not shown), wherein the controller can control the shrinkage of the telescopic member according to the detection data of the sensor, and when the relative positions of the connecting part and the connecting part 8 are matched, the controller can control the telescopic member to stretch out, so that the stretching end is inserted into the connecting part, the automation connection of the lifting appliance 10 is realized, and the labor cost is reduced, but the method is not limited to the method.

In this embodiment, offshore wind turbine generator system hoist and mount system still includes sensor and controller, and the sensor is used for detecting the relative position of connecting portion and connecting piece 8, and when connecting piece 8 reachd predetermined position for the connecting portion, the connecting portion can be inserted to the connecting piece 8 be controlled to the controller, has so set up and has improved connecting piece 8 and unit part butt joint efficiency, has reduced offshore wind turbine generator system's equipment cost. In addition, the reliability of the hoisting system of the offshore wind turbine generator system is further improved through the cooperation of the sensor and the controller.

With continued reference to fig. 2, as an example, the lifting point 7 is provided with a lifting wheel, and the lifting rope 3 bypasses the lifting wheel, so that abrasion of the lifting rope 3 is reduced, and the service life of the lifting rope 3 is prolonged. Alternatively, the hanging point 7 may be provided with a hanging ring or a hanging hole, through which the free end of the hanging rope 3 passes, but is not limited thereto. In this embodiment, two suspension points 7 are provided at the top of the tower 9 to improve the stability of the lifting appliance 10 during movement, but not limited thereto.

As an example, the location of the suspension point 7 may be adjusted according to the position of the crew member to be hoisted, avoiding the crew member to hit the tower 9 during hoisting, e.g. but not limited to, when hoisting a transformer is required, the suspension point 7 may be arranged on the nacelle rear frame. When unit components such as impellers or gearboxes are required to be hoisted, the offshore wind turbine hoisting system further comprises a top hoisting frame 2 (shown in fig. 3) which is used for being connected to a machine frame behind the machine cabin, a hoisting point 7 is arranged on the top hoisting frame 2, the top hoisting frame 2 can extend outwards from the machine frame behind the machine cabin, so that the horizontal distance between the hoisting winch rope 3 and the tower 9 is increased, and a larger space is provided for hoisting the unit components.

With continued reference to fig. 3, the top hanger 2 in this embodiment includes a pair of hanger cantilevers 21 disposed in parallel and spaced apart, wherein first ends of the pair of hanger cantilevers 21 are connected by a middle beam, and second ends of the pair of hanger cantilevers 21 are formed as free ends, so that the pair of hanger cantilevers 21 and the middle beam are formed in a "匚" shape structure, but not limited thereto.

With continued reference to the drawings, in order to facilitate the adjustment of the center of gravity position of the top hanger 2, the top hanger 2 further includes a pair of hanger telescopic members 22, the pair of hanger telescopic members 22 are disposed at two ends of the intermediate beam in a substantially longitudinal direction, the bottom ends of the hanger telescopic members 22 are connected to the intermediate beam, and hanger suspension ropes 24 are connected between the top ends of the hanger telescopic members 22 and the free ends of the hanger suspension arms 21, so that the hanger suspension arms 21, the hanger telescopic members 22 and the hanger suspension ropes 24 are formed into a triangular structure, and have a stable structure. In the present embodiment, the center of gravity of the top hanger 2 is adjusted by the extension and contraction of the hanger extension and contraction member 22, but not limited thereto.

In order to improve the connection reliability of the lifting appliance 10 and the transformer, the telescopic members are arranged in pairs, the telescopic members are spaced and are arranged at the top of the lifting appliance bracket 1 in a facing manner, when the top of the lifting appliance bracket 1 is close to the bottom of the transformer, the telescopic members horizontally extend out and can be inserted into the pin holes, and the telescopic members can be arranged at two sides of the width direction (thickness direction) of the transformer, so that the lifting appliance 10 is prevented from moving along the width direction (thickness direction) relative to the transformer, and the connection reliability of the lifting appliance 10 and the transformer is improved.

In order to further improve the use reliability of the offshore wind turbine generator system hoisting system, the telescopic members are provided with a plurality of pairs, the telescopic members of the plurality of pairs are arranged in parallel and at intervals, and when the lifting appliance 10 moves to be close to the transformer, at least two pairs of telescopic members can be connected with the transformer, so that the reliability of connection between the lifting appliance 10 and the transformer is further improved, but the method is not limited to the method.

In this embodiment, the lifting winch 4 of the lifting appliance 10 is started to retract the rope by bypassing the lifting point 7 at the top of the tower 9 through the lifting winch rope 3, so that the lifting appliance 10 is separated from the floating crane ship 5 and continuously moves upwards, the lifting appliance 10 is lifted to the top of the tower 9, and in the use process of the offshore wind turbine generator set lifting system, the stable support is not required to be provided by the cooperation of a mounting ship, so that the leasing cost of the mounting ship is saved, and the assembly cost of the offshore wind turbine generator set is reduced.

Referring to fig. 4, 5 and 12, unlike the first embodiment, the offshore wind turbine hoisting system further comprises a boom 14 provided on the spreader bracket 1, one end of the boom 14 is pivotally connected to the spreader bracket 1, the boom 14 is capable of being pivotally folded over the spreader bracket 1 (as shown in fig. 4) and pivotally unfolded with respect to the spreader bracket 1 (as shown in fig. 5), and the boom 14 is a telescopic boom.

In this embodiment, the hanger bracket 1 is attached to the side wall of the tower 9 (as shown in fig. 5), and the hanger bracket 1 is not lifted or lowered together with the set of components during the hoisting of the set of components, thereby reducing the single load weight of the hoisting roping 3.

With continued reference to fig. 4, when the lifting appliance 10 is not in use, for example, but not limited to, during the lifting process of the lifting appliance 10 itself, the suspension arm 14 may be folded and arranged on the lifting appliance support 1, at this time, the lifting appliance 10 is compact in structure, and the situation that the lifting appliance 10 is scratched with other components during the moving process is avoided, thereby improving the reliability of the use of the lifting system of the offshore wind turbine generator system.

When the spreader 10 is connected to the tower 9 and the unit components need to be lifted using the spreader 10, the boom 14 may be pivoted from the folded position to the unfolded position, and the posture of the boom 14 is adjusted by swinging the boom 14 relative to the spreader bracket 1, so as to provide space for lifting the unit components, but not limited thereto. Further, the boom 14 is configured as a telescopic boom, which improves the versatility of use of the offshore wind turbine hoisting system.

With continued reference to fig. 12, the boom 14 is rotatably connected to a boom frame 15, which boom frame 15 is connected to the spreader frame 1, but is not limited thereto. Further, the spreader 10 further comprises a boom drive member 16, the first end of the boom drive member 16 being rotatably connected to the boom 14 and the second end being rotatably connected to the boom frame 15, but not limited thereto. Alternatively, the boom driver 16 may be a telescopic member to drive the boom 14 to rotate relative to the boom frame 15 by a length change of the boom driver 16, but is not limited thereto. As an example, the boom driver 16 may be a telescopic cylinder, or a screw assembly, but is not limited thereto.

In this embodiment, the hoisting winch 4 is disposed at a first end of the boom 14, the first turning pulley block 104 is rotatably disposed above the boom 14 and near the first end of the boom 14, the first load-bearing main pulley 106 is rotatably disposed at a second end of the boom 14, and the second turning pulley block 107 is rotatably disposed at the second end of the boom 14 and below the first load-bearing main pulley 106.

In this embodiment, be provided with a plurality of connecting pieces 8 on the hoist support 1, be provided with a plurality of pinholes on the lateral wall of pylon 9, when hoist support 1 is promoted to preset position department, connecting piece 8 can insert in the pinhole of pylon 9 lateral wall to realize hoist 10 connect on the lateral wall of pylon 9, need not to occupy the installation ship, thereby practiced thrift the lease cost of installation ship, reduced offshore wind generating set's equipment cost.

As an example, the connector 8 in this embodiment may be a twist lock, which is rotatable between a locked position and an unlocked position. In the initial state, the twist lock can be in an unlocking position, the hanger bracket 1 is lifted to a preset position, the twist lock can be inserted into the pin hole, and then the twist lock is rotated to adjust the twist lock to a locking position, so that the twist lock can be locked on the tower 9, and the hanger 10 can be stably connected on the tower 9, but the invention is not limited thereto.

In this embodiment, the initial state (the state on the floating crane vessel) of the hanger bracket 1 is approximately horizontally placed, and is approximately longitudinally arranged on the side wall of the tower 9, so that the hanger bracket 1 is turned over by 90 ° in the process of lifting the hanger bracket 1 from the floating crane vessel to the top of the tower 9, and compared with the existing crane 180 ° for turning over, the hanger bracket 1 in this embodiment is convenient to operate, and is safer and more reliable.

Referring to fig. 4 to 11, in order to facilitate posture adjustment of the spreader 10 during lifting or lowering, the offshore wind turbine generator system according to the present embodiment further includes a wind turbine generator system 12, and the spreader 10 is connected to the floating vessel 5 through the wind turbine generator system 12. As an example, a guy device 12 may be placed on the floating vessel 5, the guy device 12 comprising a guy winch and a guy rope 13, the output end of the guy winch being connected with a guy winch, a first end of the guy rope 13 being wound around the guy winch, and a second end of the guy rope 13 being connectable to the spreader 10.

After the cable winch is started, the cable winch drives the cable winch drum to rotate. As an example, when the guy drum rotates clockwise, the guy rope 13 will gradually wind up on the guy drum to achieve the rope reeling of the guy rope 13. When the cable drum rotates around the anticlockwise direction, the cable rope 13 gradually falls off from the cable drum, so that the cable rope 13 is released. Thus, the attitude of the spreader 10 in the air is adjusted by winding or unwinding the guy wires 13, but this is not a limitation.

With continued reference to fig. 6, as an example, the offshore wind turbine hoisting system further includes two wind devices 12, where the two wind devices 12 are spaced apart, and the spreader 10 can be quickly and accurately adjusted to a predetermined posture under the cooperation of the two wind devices 12, but not limited to this.

In this embodiment, the hanger bracket 1 extends in the left-right direction, and the two wind devices 12 are arranged on the right side of the hanger bracket 1 at intervals, so that the two wind devices 12 and the hanger 10 form a triangle structure, and in the lifting or lowering process of the hanger bracket 1, the two wind devices 12 can conveniently adjust the posture of the hanger bracket 1.

Specifically, referring to fig. 7 and 8, the cable wind device 12 includes a frame structure 201, a movable winch 203, a guide pulley block 206 and a universal pulley block 208, wherein the movable winch 203 is movably connected to the frame structure 201, the guide pulley block 206 is rotatably connected to the frame structure 201, the guide pulley block 206 is located above the movable winch 203, the universal pulley block 208 is rotatably disposed on the frame structure 201, and the universal pulley block 208 is located on one side of the guide pulley block 206, which faces the hanger bracket 1, a tail pulley block 112 is disposed on the hanger bracket 1, one end of a cable is wound on a cable wind drum of the movable winch 203, and the other end of the cable is connected with the tail pulley block 112 after sequentially bypassing the guide pulley block 206 and the universal pulley block 208.

In this embodiment, the frame structure 201 is used as a supporting structure of the mobile winch 203, for example, but not limited to, the frame structure 201 is longitudinally arranged, a bottom support 205 is provided at the bottom of the frame structure 201, the mobile winch 203 may be firmly connected to the bottom support 205, and the bottom support 205 is fixed to the frame structure 201, so that the mobile winch 203 is reliably connected to the frame structure 201, and the reliability of use of the hoisting system of the offshore wind turbine generator set is further improved.

The frame structure 201 provided by the present disclosure is longitudinally arranged, and occupies a smaller space on the floating vessel 5, and compared with a general winch system, the space is less limited, so that the frame structure is applicable to the installation in a smaller horizontal distance with the tower 9, and is more applicable to the installation in a smaller space, thereby improving the universality of the offshore wind generating set hoisting system.

In this embodiment, the moving winch 203 is disposed at the bottom of the frame structure 201, the guide pulley block 206 and the universal pulley block 208 are disposed at the top of the frame structure 201, and the universal pulley block 208 is located at one side of the guide pulley block 206 towards the hanger bracket 1, so that the cable extends upwards from the moving winch 203 to bypass the guide pulley block 206 and then extends to the universal pulley block 208 in a bending manner in the space of the frame structure 201, and the space utilization rate of the cable system is improved.

With continued reference to the drawings, further, the cable wind device further comprises a universal pulley bracket 207, wherein the universal pulley bracket 207 is arranged at the top of the frame structure 201 and protrudes towards one side of the lifting appliance bracket 1, the universal pulley bracket 207 is provided with a limiting through hole 202, and a cable wind rope passes through the limiting through hole 202 from the guide pulley block 206 and is connected to the universal pulley block 208.

In this embodiment, the universal pulley bracket 207 is provided with the limiting through hole 202, and the cable rope passes through the limiting through hole 202 from the guide pulley block 206 and is connected to the universal pulley block 208, so that the cable rope is prevented from being separated from the guide pulley block 206, and the use reliability of the offshore wind turbine generator set hoisting system is further improved.

In order to further improve the applicability of the offshore wind turbine hoisting system, the wind turbine further comprises a nacelle arranged at the top of the tower 9, wherein the nacelle can yaw anticlockwise by a first preset angle, the boom 14 can yaw clockwise by a second preset angle relative to the hoist bracket 1, so that the boom 14 can lower the turbine component onto the transport vessel or lift the turbine component from the transport vessel, or the nacelle can yaw clockwise by a third preset angle, and the boom 14 can yaw anticlockwise by a fourth preset angle relative to the hoist bracket 1, so that the boom 14 can lower the turbine component onto the transport vessel or lift the turbine component from the transport vessel.

As an example, the first predetermined angle, the second predetermined angle, the third predetermined angle, and the fourth predetermined angle are each any one of 5 ° -60 °, but not limited thereto.

The nacelle can yaw 45 degrees anticlockwise, the suspension arm 14 can yaw 10 degrees clockwise, the suspension arm 14 and the nacelle can rotate bidirectionally, and the drop limit of a transport ship can be reduced, so that the applicability of the offshore wind turbine generator set hoisting system is further improved.

The lifting appliance 10 further comprises a first turning-over pulley block 104, a first bearing main pulley 106, a second turning-over pulley block 107, an in-cabin fixed pulley 101, a lifting pulley block 113 and a second bearing main pulley 108 which are rotatably connected to the lifting appliance bracket 1, wherein the lifting winch 4 is arranged at the first end of the lifting appliance bracket 1, the first bearing main pulley 106 is arranged at the top of the second end of the lifting appliance bracket 1, the first turning-over pulley block 104 is arranged at the top of the lifting appliance bracket 1 and is arranged between the lifting winch 4 and the first bearing main pulley 106 at intervals, the in-cabin fixed pulley 101 and the lifting pulley block 113 are arranged at the second end of the lifting appliance bracket 1, the in-cabin fixed pulley 101 is positioned below the first bearing main pulley 106, the lifting pulley block 113 is positioned below the in-cabin fixed pulley 101, and the free end of the lifting winch rope 3 passes through the first pulley block 104 and is sequentially wound on the first bearing main pulley 106, the second turning-over pulley block 107, the in-cabin fixed pulley 101, the lifting pulley block 113 and the second bearing main pulley 108.

With the popularization of large megawatt wind generating sets, the sizes of the set components are increased, and the large-size set components are usually required to be assembled, disassembled and replaced by the cooperation of an installation ship, so that the assembly cost and the operation and maintenance cost of the wind generating sets are high, and the assembly cost and the operation and maintenance cost of the wind generating sets are high.

The present disclosure provides a hoisting method of an offshore wind turbine generator system, in which a hoist 10 is placed on a floating vessel 5, the hoist 10 includes a hoist bracket 1, a hoist winch 4 fixed on the hoist bracket 1, and a hoist rope 3 wound on a hoist drum, the hoist bracket 1 is used as a supporting member of the hoist 10 for supporting the hoist winch 4, the hoist rope 3, and the like. The hoisting winch 4 is used for providing power for the lifting appliance 10, specifically, an output shaft of the hoisting winch 4 is connected with a hoisting winch barrel, and the hoisting winch 4 is used for driving the hoisting winch barrel to rotate, wherein the hoisting winch rope 3 is wound on the hoisting winch barrel.

The method for hoisting the offshore wind turbine generator set comprises the steps of placing a hoisting tool 10 on a floating crane vessel 5, enabling a hoisting winch 3 of the hoisting tool 10 to bypass a hoisting point 7 at the top of a tower 9, enabling the free end of the hoisting winch 3 to be connected with the hoisting tool 10, starting a hoisting winch 4 of the hoisting tool 10 to wind the hoisting winch 3 and hoist the hoisting tool 10 to the top of the tower 9, dismantling a unit part at the top of the tower 9 and conveying the unit part to the floating crane vessel 5 by the hoisting tool 10, or installing the unit part lifted by the hoisting tool 10 at the top of the tower 9.

According to the offshore wind turbine generator set hoisting method, the lifting appliance 10 can lift the offshore wind turbine generator set to the top of the tower 9 without occupying a mounting ship, so that the cost of renting the mounting ship is saved, and the assembly cost of the wind turbine generator set is reduced.

In an exemplary embodiment of the present disclosure, the step of removing the crew member from the top of the tower 9 and transporting it from the spreader 10 to the floating vessel 5 comprises connecting the spreader 10 to the crew member, then removing the crew member from the top of the tower 9 and driving the hoist winch 4 to release the hoist rope 3 so that the spreader carrier 1 carries the crew member back to the floating vessel 5.

Specifically, after the lifting appliance 10 is lifted up, the position of the lifting appliance 10 is adjusted to approach the unit component to be disassembled, for example, but not limited to, the lifting appliance 10 is moved to the lower side of the unit component to be disassembled, and then the lifting appliance 10 is connected with the unit component until the lifting appliance 10 is firmly connected with the unit component to be disassembled.

At this point the hoist rope 3 can be connected to the unit component, which is then detached from the top of the tower 9 and the hoist winch 4 is driven to release the hoist rope 3, allowing the hoist rope 3 to unwind, so that the hoist bracket 1 carries the unit component back to the floating vessel 5.

In this embodiment, the hoist 10 is lifted to the top of the tower 9 in the process of winding the lifting winch rope 3, at this time, the hoist 10 is connected with the unit component to be disassembled, then the lifting winch rope 3 is released, the hoist 10 can be released along with the unit component to be disassembled, the hoist 10 is not mounted on the tower 9 in the process, and a connection space is not required to be provided for the hoist 10, so that the wind generating set with compact top space of the tower 9 and without the connection space of the hoist 10 can be adapted, and the universality of a hoisting system of the offshore wind generating set is improved.

In this embodiment, the connection between the lifting appliance 10 and the unit component to be detached may be assembled manually, but not limited to this, in this embodiment, in order to improve the automation capability and reduce the labor cost, the lifting appliance 10 includes a connecting piece 8 disposed on the lifting appliance bracket 1, the unit component is provided with a connecting portion connected with the connecting piece 8, and when the lifting appliance 10 lifts to the unit component, the connecting piece 8 is driven to extend and be connected with the connecting portion.

For convenience of description, in this embodiment, the connecting member 8 is a telescopic member (as shown in fig. 2), and the connecting portion of the unit component is a pin hole matching the telescopic member. The stiff end of extensible member is connected in hoist support 1, and the extension end of extensible member can stretch out for hoist support 1, and when hoist 10 promoted to preset position department, the extensible member can stretch out towards the pinhole of unit part to insert in the pinhole, so can realize hoist 10 and unit part's connection, but not limited to this.

In an alternative embodiment, the spreader 10 may be attached to the tower 9 after the spreader 10 is lifted to the top of the tower 9, such that the weight of a single hoist of the hoist rope 3 is not too great, such as, but not limited to, the spreader 10 being attached to a side wall of the tower 9.

As an example, the present embodiment is described taking the example that the spreader 10 is connected to the side wall of the tower 9. The connecting piece 8 on the lifting appliance 10 comprises a torsion lock, the side wall of the tower 9 is provided with a pin hole matched with the torsion lock, in an initial state, the torsion lock is in an unlocking position, after the lifting appliance 10 is lifted to a preset height, the posture of the lifting appliance 10 is adjusted so that the torsion lock is inserted into the pin hole, and then the torsion lock is rotated until the torsion lock is in a locking position, and at the moment, the lifting appliance 10 is connected to the side wall of the tower 9.

Specifically, the step of mounting the unit components lifted by the spreader 10 on top of the tower 9 comprises fixedly connecting the spreader holder 1 with the side walls of the tower 9 or with a nacelle rear frame provided on the tower 9 such that the spreader 10 is connected to the tower 9 to keep the spreader 10 stationary and to avoid unintentional shaking of the spreader 10. Further, the lifting appliance 10 is connected to the tower 9, so that the lifting appliance 10 is prevented from being supported by a leasing installation ship, the leasing cost of the installation ship is saved, and the assembly cost of the offshore wind turbine generator set is reduced.

The free end of the hoisting winch rope 3 is connected with a unit component, the hoisting winch 4 is driven to release the hoisting winch rope 3, the hoisting winch rope 3 is lowered, and the unit component is conveyed to the floating crane ship 5.

Compared with the embodiment that the lifting appliance 10 and the unit components are lowered together, in the embodiment, the single carrying weight of the lifting winch 4 is not too large, the power of the lifting winch 4 is smaller, and the single carrying capacity of the lifting winch rope 3 can be slightly lower, so that the cost of the offshore wind turbine generator set lifting system is reduced.

In order to adjust the attitude of the spreader 10 during its movement, the spreader 10 is connected to the vessel 5 by means of a wind device by means of which the attitude of the spreader 10 in the air is adjusted, during which the hoist winch 4 of the spreader 10 is activated to wind the hoist rope 3 and hoist the spreader 10 to the top of the tower 9.

Optionally the step of dismantling the crew components at the top of the tower 9 and transporting them by means of the spreader 10 to the floating vessel 5 comprises fixedly attaching the spreader bracket 1 to the side wall of the tower 9 and hoisting the crew components to the floating vessel 5 by means of the boom 14.

The present disclosure provides a method of lifting an offshore wind power generation unit including a tower 9 and a unit member mounted on the top of the tower 9, the method including placing a lifting appliance 10 on a floating vessel 5, the lifting appliance 10 including a lifting appliance bracket 1, a lifting winch 4 fixed to the lifting appliance bracket 1, and a lifting winch rope 3 wound on a winch drum, bypassing the lifting winch rope 3 of the lifting appliance 10 around a lifting point 7 on the top of the tower 9 and connecting a free end of the lifting winch rope 3 to the lifting appliance 10, starting the lifting winch 4 of the lifting appliance 10 to wind the lifting winch rope 3 and lift the lifting appliance 10 to the top of the tower 9, removing the unit member on the top of the tower 9 and transporting the unit member to the floating vessel 5 by the lifting appliance 10, or mounting the unit member lifted by the lifting appliance 10 on the top of the tower 9.

According to the offshore unit, the lifting winch rope 3 of the lifting winch 10 bypasses the lifting point 7 at the top of the tower 9, the free end of the lifting winch rope 3 is connected to the lifting winch 10, and when the lifting winch 4 is started, the lifting winch 10 can be driven by the lifting winch rope 3 to move upwards and be connected to the top of the tower 9, and an installation ship is not required to be used for replacement or installation of the offshore unit, so that the renting cost of the installation ship is reduced, and the lifting cost of the offshore unit is also reduced.

In order to control the attitude adjustment in the process of moving the lifting appliance 10, a cable wind device of an offshore lifting system is connected between the floating crane ship 5 and the lifting appliance 10, and in the process of moving the lifting appliance 10 up and down, the cable wind device can adjust the attitude of the lifting appliance 10.

In the offshore unit hoisting method provided in the first exemplary embodiment of the present disclosure, the hoist 10 can be connected to a unit component to be disassembled after being moved up to the top of the tower 9, for example, but not limited to, the hoist 10 can be connected to a transformer.

According to the offshore wind turbine generator system hoisting method provided by the second exemplary embodiment of the disclosure, after the hoisting tool 10 moves upwards to the top of the tower 9, the hoisting tool 10 can be fixed on the side wall of the tower 9 or on the frame behind the engine room, so that the hoisting tool 10 is fixed on the top of the tower 9, a long-term occupied installation ship is not needed, the leasing cost of the installation ship is saved, and the assembly cost of the offshore wind turbine generator system is reduced.

Besides, the hoisting method of the offshore wind turbine generator system can be also applied to hoisting and installing the components of the offshore wind turbine generator system, firstly, a transformer is placed on a floating crane ship 5, the free end of a hoisting winch rope 3 is connected with the transformer, a hoisting winch 4 is started to drive the hoisting winch rope 3 to move and lift the transformer, when the transformer is lifted to a preset position, the transformer can be fixed on an operation platform, and then the free end of the hoisting winch rope 3 is separated from the transformer.

In the description of the present disclosure, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the present disclosure and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present disclosure.

The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present disclosure, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present disclosure, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "affixed" are to be construed broadly, and may, for example, be fixedly connected, detachably connected, integrally connected, mechanically connected, electrically connected, communicatively connected, directly connected, indirectly connected through intermediaries, communicate within two elements, or interact with each other. The specific meaning of the terms in this disclosure will be understood by those of ordinary skill in the art as the case may be.

The described features, structures, or characteristics of the disclosure may be combined in any suitable manner in one or more embodiments. In the above description, numerous specific details are provided to give a thorough understanding of embodiments of the present disclosure. One skilled in the relevant art will recognize, however, that the disclosed aspects may be practiced without one or more of the specific details, or with other methods, components, materials, etc. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring aspects of the disclosure.

Claims (14)

1. Offshore wind generating set hoisting system, offshore wind generating set includes pylon (9), its characterized in that, offshore wind generating set hoisting system includes hoist (10), hoist (10) are including hoist support (1), hoist winch (4) and hoist winch rope (3), hoist winch (4) are used for providing hoisting power, the output of hoist winch (4) is connected with and lifts by crane winch drum, hoist winch rope (3) twine in lift by crane winch drum, the top of pylon (9) is provided with hoisting point (7), the free end of hoist winch rope (3) can bypass hoisting point (7) and connect in hoist support (1) for hoist support (1) can rise to from floating vessel (5) top or follow tower (9) top whereabouts to on floating vessel (5).

2. Offshore wind park hoisting system according to claim 1, wherein the wind park further comprises a nacelle arranged on top of the tower (9) and a set part mounted in the nacelle, the spreader (10) further comprising a connection piece (8), the connection piece (8) being arranged to the spreader bracket (1),

Wherein the machine set component is provided with a connecting part matched with the connecting piece (8), and the connecting part is connected with the connecting piece (8) so that the lifting appliance (10) is connected with the machine set component, or

The cabin rear frame is provided with a connecting part matched with the connecting piece (8), and the connecting part is connected with the connecting part through the connecting piece (8), so that the lifting appliance (10) is connected with the cabin rear frame.

3. Offshore wind park hoisting system according to claim 2, wherein the connecting element (8) is a telescopic element, the fixed end of which is connected to the spreader bracket (1), the extended end of which can extend relative to the spreader bracket (1) to be connectable with the connecting portion.

4. An offshore wind turbine hoisting system as claimed in claim 3, wherein said telescopic members are arranged in pairs and spaced apart, with the projecting ends of said telescopic members facing each other, or,

The offshore wind turbine generator system further comprises a sensor and a controller, wherein the sensor is used for detecting the relative positions of the connecting part and the connecting piece (8), and when the connecting piece (8) reaches a preset position relative to the connecting part, the controller can control the connecting piece (8) to be inserted into the connecting part.

5. Offshore wind park hoisting system according to claim 1, characterized in that the wind park further comprises a nacelle arranged on top of the tower (9) and a set part mounted in the nacelle, the spreader (10) further comprises a connecting piece (8), the connecting piece (8) is arranged in the spreader holder (1), the side wall of the tower (9) is provided with a connecting part matching with the connecting piece (8), and the connecting part is connected by the connecting piece (8) such that the spreader (10) is connected with the side wall of the tower (9).

6. Offshore wind park hoisting system according to claim 5, wherein the connection piece (8) is a twist lock, which is rotatable between an unlocked position and a locked position, the connection part is a pin hole matching the twist lock, and the hoisting tool (10) is connected to the connection part when the twist lock is inserted into the pin hole and adjusted to the locked position.

7. Offshore wind park hoisting system according to claim 1, characterized in that the offshore wind park further comprises a nacelle mounted on top of the tower (9), a nacelle rear frame and a plurality of park components mounted on the nacelle rear frame, the offshore wind park hoisting system further comprising a hoisting point (7), the hoisting winch (4) being able to be hoisted by a hoisting winch rope (3) around the hoisting point (7), wherein,

The suspension point (7) is arranged on the rear frame of the engine room, or,

The offshore wind turbine generator system hoisting system further comprises a top hanging frame (2) which is used for being connected with the cabin rear frame, and the hanging point (7) is arranged on the top hanging frame (2).

8. Offshore wind park lifting system according to any of claims 1-7, further comprising a wind device (12), wherein the lifting appliance (10) is connected to the floating vessel (5) by means of the wind device (12).

9. Offshore wind park hoisting system according to claim 8, wherein the guy device (12) comprises a frame structure (201), a moving winch (203), a guiding pulley block (206) and a universal pulley block (208), wherein the moving winch (203) is movably connected to the frame structure (201), the guiding pulley block (206) is rotatably connected to the frame structure (201), the guiding pulley block (206) is located above the moving winch (203), the universal pulley block (208) is rotatably arranged on the frame structure (201), and the universal pulley block (208) is located on the side, facing the spreader bracket (1), of the guiding pulley block (206), a tail pulley block (112) is arranged on the spreader bracket (1), one end of the guy rope is wound on the guy drum of the moving winch (203), and the other end of the guy rope sequentially bypasses the guiding pulley block (206) and the universal pulley block (208) and then is connected to the tail pulley block (112).

10. Offshore wind park hoisting system according to claim 9, wherein the cable wind device further comprises a universal pulley bracket (207), the universal pulley bracket (207) being arranged at the top of the frame structure (201) and protruding towards one side of the spreader bracket (1), the universal pulley bracket (207) being provided with a limiting through hole (202), the cable wind rope passing from the guiding pulley block (206) through the limiting through hole (202) and being connected to the universal pulley block (208).

11. Offshore wind park lifting system according to claim 2, further comprising a boom (14) arranged on the lifting appliance support (1), one end of the boom (14) being pivotally connected to the lifting appliance support (1), the boom (14) being pivotable to fold over the lifting appliance support (1) and to be pivoted out with respect to the lifting appliance support (1), and the boom (14) being a telescopic boom.

12. Offshore wind park hoisting system according to claim 11, wherein the wind park further comprises a nacelle arranged on top of the tower (9), the nacelle being able to yaw counter-clockwise a first predetermined angle, the boom (14) being able to yaw clockwise a second predetermined angle in relation to the hoist frame (1), such that the boom (14) is able to lower the park part onto or lift the park part from a transport vessel, or

The nacelle can be yawed clockwise by a third predetermined angle and the boom (14) can be yawed anticlockwise by a fourth predetermined angle with respect to the spreader bracket (1), so that the boom (14) can lower the crew member onto or lift the crew member from a transport vessel.

13. Offshore wind turbine hoisting system according to any of claims 1-7, wherein the hoisting means (10) further comprises a first turning-over pulley block (104), a first load-bearing main pulley (106), a second turning-over pulley block (107), an in-cabin fixed pulley (101), a hoisting pulley block (113) and a second load-bearing main pulley (108) rotatably connected to the hoisting means support (1), wherein the hoisting winch (4) is arranged at the first end of the hoisting means support (1), the first load-bearing main pulley (106) is arranged at the top of the second end of the hoisting means support (1), the first turning-over pulley block (104) is arranged at the top of the hoisting means support (1) and is arranged between the hoisting winch (4) and the first load-bearing main pulley (106), the in-cabin fixed pulley (101) and the hoisting pulley block (113) are arranged at the second end of the hoisting means support (1), and the in-cabin fixed pulley (101) is arranged at the second end of the hoisting means support (1), the first turning-over pulley block (101) is arranged at the first end of the hoisting means support (1), the first turning-over pulley block (101) is wound around the first end of the hoisting pulley block (101), and the first turning-over pulley block (101) is arranged at the second end of the hoisting means (101) in turn-over pulley (101) in turn around the first end of the hoisting means (3) The lifting pulley block (113) and the second bearing main pulley (108).

14. Offshore wind park lifting system according to claim 2, wherein the park component comprises a generator, or a transformer, or a gearbox, or blades, or an impeller.