CN102226445B - Fan impellor locking device and wind-driven power generator set - Google Patents

Abstract

The invention provides a fan impeller locking device, which includes a locking pin, a locking hole, an optical trigger unit and a control unit respectively arranged on the stator main shaft and the rotating shaft. Wherein, the optical trigger unit is used for sending a trigger signal to the control unit when the locking pin is aligned or about to be aligned with the locking hole; the control unit is used for driving the locking pin to perform a corresponding locking action according to the trigger signal. The present invention also provides a wind power generating set provided with the above fan impeller locking device. Both the fan impeller locking device and the wind power generating set provided by the present invention can realize automatic, efficient and accurate locking operation on the fan impeller, and can effectively avoid the locking problem between the locking pin and the locking hole.

Description

Fan impeller locking device and wind power generating set

technical field

The invention relates to the technical field of wind power generation, in particular to a fan impeller locking device and a wind power generator set. the

Background technique

In recent years, wind power generation technology has received extensive attention from governments of various countries, and thus has developed rapidly. During the installation, commissioning and daily maintenance of wind turbines, it is necessary to lock the impeller first to ensure the safety of operators and equipment. The above operations need to be realized by means of the impeller locking device installed on the unit. the

Currently, most of the impeller locking devices used require manual operation by operators based on experience and visual inspection results. Specifically, the impeller is first decelerated by blade pitch or mechanical friction brake. When the speed drops to a certain range, the operator judges and captures the locking position, and then manually activates the impeller locking device. the

However, the above-mentioned impeller locking process inevitably has the following problems:

First of all, due to the uneven judgment experience and operational proficiency of the operators, there are problems such as the operator's judgment error on the impeller speed and the relative lag of the locking operation during the impeller locking process. There is no problem of damage to the locking device caused by aligning the locking hole; at the same time, the impact of the locking pin will increase the impact load borne by the unit and affect the normal service life of the equipment. the

In addition, even if the operator has rich operating experience, there is still no guarantee that each impeller locking operation can be completed accurately; that is, manual impeller locking operation has poor repeatability and low efficiency. the

In addition, since the reasonable depth of the locking pin inserted into the locking hole cannot be known during the manual locking operation, and the joint surface of the locking pin and the locking hole is mostly set as a conical self-locking mating surface, it is often encountered due to operational errors. The problem of locking the locking pin caused by the excessive fit between the locking pin and the locking hole, and once the locking pin is locked, will cause a lot of inconvenience to equipment maintenance. the

Contents of the invention

In order to solve the above problems, the present invention provides a fan impeller locking device, which can realize automatic, efficient and accurate locking of the fan impeller, and can effectively avoid the locking problem between the locking pin and the locking hole. the

In order to solve the above problems, the present invention also provides a wind power generating set, which can also realize automatic, efficient and accurate locking of the fan impeller, and can effectively avoid the locking problem between the locking pin and the locking hole. the

For this reason, the present invention provides a fan impeller locking device, which is used to lock the impeller of the wind power generating set. The wind generating set includes a stator main shaft and a rotating shaft for rotatably connecting the impeller and the stator main shaft together. The locking device includes a locking pin arranged on the stator main shaft and a locking hole correspondingly arranged on the rotating shaft. In addition, an optical trigger unit and a control unit are arranged between the rotating shaft and the stator main shaft, wherein the optical trigger unit is used for When the locking pin is aligned with the locking hole or is about to be aligned, a trigger signal is sent to the control unit; the control unit is used to drive the locking pin to perform corresponding locking actions according to the trigger signal;

Wherein, the optical trigger unit includes a collimated light source arranged at the end of the locking pin, a light receiving part and a reflecting part arranged inside the locking hole; when the locking pin is aligned with the locking hole or is about to be aligned, the light emitted by the collimated light source is The reflective part is reflected to the light receiving part, and the light receiving part sends a trigger signal to the control unit after receiving the above light;

Wherein, the light receiving part at least includes a first light receiving part and a second light receiving part; the first light receiving part and the second light receiving part are respectively located on both sides of the collimated light source, and during the rotation of the rotating shaft relative to the stator main shaft, The reflection part reflects the light emitted by the collimated light source to the first light receiving part and the second light receiving part successively; Calculate the speed at which the turning shaft rotates relative to the stator main shaft. the

Wherein, the collimated light source includes a laser transmitter, and correspondingly, the light receiving part includes a laser receiver. the

Wherein, the reflection part includes a total reflection mirror. the

Wherein, the control unit judges whether the rotational speed is lower than a preset threshold, and if the judged result is yes and the trigger signal is received again, the locking pin is driven to be inserted into the locking hole to lock the impeller. the

Preferably, the optical trigger unit sends a trigger signal to the control unit before the locking hole is aligned with the locking pin; after the control unit receives the trigger signal, it advances a certain pre-compensation time according to the rotation speed of the rotating shaft relative to the stator main shaft. Start driving the locking pin to lock. the

Preferably, the above-mentioned locking device further includes a positioning switch arranged at the end of the locking pin, the positioning switch is used to send an in-position signal to the control unit after touching the inner end surface of the locking hole, and the control unit stops driving the locking pin after receiving the in-position signal pin. the

Wherein, the positioning switch includes a contact sensor. the

Wherein, there is at least one locking hole, and the number and position of the locking pins correspond to at least one locking hole. the

Wherein, the locking direction of the locking pin and the locking hole is along the axial direction and/or radial direction of the rotating shaft. the

In addition, the present invention also provides a wind power generating set, including the impeller and the above-mentioned fan impeller locking device provided by the present invention, for locking the impeller. the

The present invention has the following beneficial effects:

The fan impeller locking device provided by the present invention can send a trigger signal to the control unit when the locking pin and the locking hole are precisely aligned or are about to be aligned by means of the optical trigger unit, and the control unit can drive the locking pin after receiving the above trigger signal. Automatic lock operation. Since the entire impeller locking process does not require manual intervention, it not only has the advantages of very good operation repeatability and fast efficiency, but also can avoid the locking caused by the operator's operation error or the operator's operating experience and other factors during manual locking. Many problems such as device or impeller damage. the

Moreover, in a preferred embodiment, the fan impeller locking device provided by the present invention further includes a positioning switch that defines the relative depth between the locking pin and the locking hole, and the positioning switch can be triggered when the locking pin reaches a specified position in the locking hole , so that the problem of locking between the locking pin and the locking hole can be effectively avoided, thereby improving the safety of the impeller locking operation. the

Moreover, in another preferred embodiment, the fan impeller locking device provided by the present invention can also pre-compensate the locking action of the locking pin according to the rotation speed of the fan impeller, so that the locking pin can be more accurately inserted into the locking hole. the

In addition, when the wind power generating set provided by the present invention performs the impeller locking operation by means of the above-mentioned fan impeller locking device provided by the present invention, it can also realize automatic, fast and accurate operation. Therefore, the present invention provides that the wind power generating set not only has higher operating efficiency and accuracy during the impeller locking operation, but also can effectively avoid problems such as locking between the locking pin and the locking hole. the

Description of drawings

Fig. 1 is the functional block diagram of locking device provided by the present invention;

Fig. 2 is a schematic diagram of the installation structure of the locking device provided by the present invention in the wind power generating set;

Fig. 3 is the schematic cross-sectional view of a specific embodiment of the locking device provided by the present invention;

Figure 4 is a schematic cross-sectional view of the locking device shown in Figure 3 when it is in a locked state; and

Fig. 5 is a schematic diagram of the working principle of the locking device provided by the present invention for the speed measurement process before locking. the

Detailed ways

The fan impeller locking device provided by the present invention is mainly used for locking the impeller of the wind generating set, so that the staff can overhaul and maintain the wind generating set. Usually, the impeller is rotatably connected to the stator main shaft of the wind power generating set through the rotating shaft, and the fan impeller locking device provided by the present invention is arranged between the above-mentioned rotating shaft and the stator main shaft. The device specifically includes a locking pin arranged on the main shaft of the stator and a corresponding locking hole arranged on the rotating shaft, and an optical trigger unit and a control unit for controlling the locking pin to perform an automatic locking operation. the

In order to enable those skilled in the art to better understand the technical solution of the present invention, the fan impeller locking device and the wind power generating set provided by the present invention will be described in detail below with reference to the accompanying drawings. the

Please refer to FIG. 1 , which is a functional block diagram of the locking device provided by the present invention. As shown in the figure, the optical trigger unit is used to send a trigger signal to the control unit when the locking pin is aligned with the locking hole or is about to be; the control unit is used to drive the locking pin to perform corresponding locking actions according to the trigger signal from the optical trigger unit, Thereby complete the operation to fan impeller. The optical trigger unit adopted in the present invention can realize accurate detection of the alignment of the locking pin and the locking hole by means of the optical trigger signal, and realize the automatic driving of the above-mentioned locking pin by means of the control unit, thus realizing the alignment without manual operation. The precise locking of the fan impeller not only greatly improves the working efficiency of the fan impeller locking operation, but also effectively avoids many problems caused by human errors such as operator experience and judgment accuracy. Wherein, the above-mentioned control unit can be realized by, for example, a device or equipment with an automatic control function such as a single-chip microcomputer and a PC. the

Please refer to Figure 2, Figure 3 and Figure 4 together, wherein, Figure 2 is a schematic diagram of the installation structure of the locking device provided by the present invention in a wind turbine; Figure 3 is a schematic cross-sectional view of a specific embodiment of the locking device provided by the present invention ; FIG. 4 is a schematic cross-sectional view of the locking device shown in FIG. 3 when it is in a locked state. the

As shown in Figure 2, the locking pin 4 is arranged at a specific installation position on the stator main shaft 3, and the locking hole 5 is arranged on the rotating shaft 2. In this embodiment, the number of the locking holes 5 is multiple and evenly distributed. On the same circumference of the rotating shaft 2, in this way, the locking pin 4 can lock the rotating shaft 2 as long as it is locked with any locking hole 5. In addition, one end of the rotating shaft 2 is rotatably connected to the stator main shaft 3, and the other end is fixedly connected to the hub 1 of the fan impeller, so that the rotating shaft 2 is driven by the fan impeller. It is easy to understand that although the locking device shown in Figure 2 corresponds to one locking pin and multiple locking holes, the present invention is not limited thereto, and the staff can appropriately increase the number of locking pins according to actual needs , and reasonably set the position of each locking pin and locking hole. For example, only one locking pin and one locking hole are set, or a plurality of locking pins and locking holes corresponding to each other in number and relative positions are set, and any improvement based on the spirit and essence of the present invention can realize the improvement of The locking device for accurate and efficient locking operation of the fan impeller should be regarded as the scope of protection of the present invention. the

Please refer to Fig. 3. In a specific embodiment, the optical trigger unit in the locking device provided by the present invention includes a collimated light source 6 arranged at the end of the locking pin 4, a light receiving part 8 and a reflector arranged inside the locking hole 5. Part 7. Wherein, the locking pin 4 is installed in the locking pin installation portion 11 on the stator main shaft 3 , and the locking hole 5 is provided on the rotating shaft 2 . In this embodiment, the above-mentioned collimated light source 6 can specifically adopt a laser transmitter, and correspondingly, the above-mentioned light receiving part 8 can specifically use a kind of laser receiver; the above-mentioned reflecting part 7 can specifically use a kind of total reflection mirror. Therefore, during the rotation of the locking hole 5 with the rotating shaft 2 (the direction of the rotating shaft relative to the stator main shaft is indicated by the direction of the arrow in FIG. 3 ), whenever the locking hole 5 passes the position of the locking pin 4 and is aligned with the locking hole 5 or When it is about to be aligned, the total reflection mirror located inside the locking hole 5 can reflect the collimated light emitted by the laser transmitter to the laser receiver, and the laser receiver as the light receiving part 8 will generate a specific light after receiving the above light. trigger signal and send this signal to the control unit. After receiving the above-mentioned trigger signal, the control unit will drive the locking pin 4 to quickly push toward the locking hole 5 and insert it into the locking hole 5, thereby completing the locking operation of the fan impeller. As for the specific locking pin 4 driving mechanism, for example, various driving modes such as pneumatic, electric and hydraulic transmission can be adopted to realize. the

Please refer to Fig. 4, in a preferred embodiment of the locking device provided by the present invention, the end of the locking pin 4 is also provided with a positioning switch 10, which is used to prevent the matching profile between the locking pin 4 and the locking hole 5 from being Locking phenomenon occurs due to overfitting. The positioning switch 10 can specifically adopt a contact sensor. When the locking pin 4 reaches a certain depth in the locking hole 5, the positioning switch 10 contacts the inner end surface of the locking hole 5, thereby triggering the positioning switch 10. When the positioning switch 10 is triggered, it will immediately send an in-position signal to the control unit, and the control unit stops driving the locking pin 4 after receiving the above-mentioned in-position signal. the

Please refer to FIG. 3 and FIG. 5 comprehensively. In another preferred embodiment of the locking device provided by the present invention, the locking device provided by the present invention can also be used to measure the rotational speed of the rotating shaft 2 by means of its optical trigger unit. Specifically, the light receiving part in the optical trigger unit may at least include a first light receiving part 8 and a second light receiving part 9; Both sides of the light source 6. In this way, during the rotation of the rotating shaft 2 relative to the stator main shaft 3, when the locking hole 5 passes the position of the locking pin 4, the reflection part 7 located in the locking hole 5 can reflect the light emitted by the collimated light source 6 to the The first light receiving part 8 and the second light receiving part 9 . The above-mentioned first light receiving part 8 and the second light receiving part 9 send trigger signals to the control in sequence after receiving the upper light, and the control unit can according to the time of the signals sent by the first light receiving part 8 and the second light receiving part 9 The time interval between the two receiving light can be obtained from the interval, and the speed at which the rotating shaft 2 rotates relative to the stator main shaft 3 at this time can be calculated according to the distance between the two. the

It should be noted that, for wind power generating sets, a dedicated speed measuring unit is provided to provide necessary data for the operation of the wind turbine. However, the locking device provided by the present invention has the advantage of having an independent speed measurement function, which is that it can perform speed measurement independently of the control system of the wind power generator, thereby providing required parameters for the locking of the fan impeller. Because when the impeller is locked, the rotational speed of the impeller needs to be lower than a certain threshold, and the locking device provided by the present invention can directly obtain the impeller rotational speed parameters, thereby realizing an independent fully automatic locking operation. Specifically, the control unit is used to judge whether the above-mentioned measured rotational speed is lower than the preset threshold value, and if the judgment result is yes, the locking device enters the locking preparation state, and when the control unit receives the trigger signal again, it immediately The drive lock pin is inserted into the lock hole to lock the impeller. When the measured impeller speed is higher than the above threshold, for example, the control unit may adopt conventional means such as fan impeller pitch or mechanical friction brake to reduce the impeller speed until the impeller speed is lower than the above threshold before implementing the locking operation. the

In a preferred embodiment of the locking device provided by the present invention, the optical trigger unit sends a trigger signal to the control unit before the locking hole is aligned with the locking pin; The pre-compensation time for the locking pin to move in advance is calculated based on parameters such as the rotational speed and the time required for the action of the locking pin, and the locking pin is driven to lock in advance of the above-mentioned pre-compensation time. Usually, this implementation manner is mostly used in some wind power generating sets that have very strict requirements on locking accuracy. Wherein, the length of the specific pre-compensation time may be determined through experiments and/or experience of technical personnel. the

It should be pointed out that, in the above-mentioned embodiment, the locking direction of the locking pin and the locking hole is set along the axial direction of the rotating shaft, but the present invention is not limited thereto, for example, the locking direction of the above-mentioned locking pin and the locking hole can also be Or, when a plurality of locking pins and locking holes are provided, the locking direction of a part of the locking pins and the locking holes is set along the axial direction of the rotating shaft, and the locking direction of the other part of the locking pins and the locking holes The locking direction is set along the radial direction of the rotating shaft; and, the locking direction of the locking pin and the locking hole is set to any direction that is conducive to fast and accurate locking of the two. The above-mentioned locking device adopting multiple locking directions should also belong to the protection scope of the present invention. the

It should also be pointed out that the collimated light source, light receiving part and reflecting part in the above-mentioned optical trigger unit can also be arranged in other positions than the locking pin and the locking hole, as long as the above-mentioned collimated light source, light receiving part and reflecting part The relative position between the locking hole and the locking pin should correspond to each other, that is to say, no matter where the collimated light source, light receiving part and reflecting part are arranged, as long as the locking pin and the locking hole are aligned At the same time, the light emitted by the collimated light source can just be reflected by the emitting part to the light receiving part. the

To sum up, the locking device provided by the present invention can realize the precise positioning and automatic locking of the locking pin and the locking hole by means of the optical trigger unit and the control unit, thereby realizing accurate and efficient locking of the fan impeller without manual operation In this way, not only can the work efficiency be effectively improved, but also mechanical damage caused by factors such as staff experience and judgment errors can be avoided due to manual locking. In addition, in some preferred embodiments of the present invention, the locking device further includes a positioning switch, so that the locking pin can automatically stop after reaching a predetermined depth in the locking hole, effectively avoiding the locking problem of the two. In addition, in other preferred embodiments of the present invention, the automatic speed measurement function of the fan impeller can also be realized by means of the optical trigger unit and the control unit, so that the locking device provided by the present invention can be realized independently of the control system of the wind power generating set Independent locking operation. the

As another technical solution, the present invention also provides a wind power generating set, at least including the impeller and the fan impeller locking device provided in the present invention, for locking the impeller when necessary. Based on the same or similar reasons, the wind power generating set provided by the present invention also has the advantages of automaticity, high efficiency, accuracy and locking prevention when performing fan impeller locking operations. the

It can be understood that, the above embodiments are only exemplary embodiments adopted for illustrating the principle of the present invention, but the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also regarded as the protection scope of the present invention. the

Claims (11)

1. a fan impeller locking device, for locking the impeller of wind power generating set, described wind power generating set comprise stator main shaft with for make described impeller to be rotatably connected to described stator main shaft together with rotatingshaft, described fan impeller locking device comprises the stop pin be arranged on described stator main shaft and the locking aperture be arranged on accordingly on described rotatingshaft

It is characterized in that, between described rotatingshaft and described stator main shaft, be provided with optics trigger element and control unit, wherein

Described optics trigger element maybe will to sending trigger signal to described control unit on time for aiming at described locking aperture at described stop pin;

Described control unit is used for driving described stop pin to perform corresponding lock out action according to described trigger signal;

Described optics trigger element comprises the collimated light source, the light receiver portion that are arranged at described stop pin end and is arranged at the reflective portions of described locking aperture inside;

Aiming at described locking aperture when described stop pin maybe will on time, the light that described collimated light source sends is reflexed to described light receiver portion by described reflective portions, and described light receiver portion sends described trigger signal to described control unit after receiving above-mentioned light;

Described light receiver portion at least comprises the first light receiver portion and the second light receiver portion;

Described first light receiver portion and the second light receiver portion lay respectively at the both sides of described collimated light source, in the process rotated relative to described stator main shaft at described rotatingshaft, the light that described collimated light source sends by described reflective portions successively reflexes to described first light receiver portion and the second light receiver portion;

Described control unit receives time lag of described light and the distance of the two according to described first light receiver portion and the second light receiver portion and calculates the rotating speed that described rotatingshaft rotates relative to described stator main shaft.

2. fan impeller locking device according to claim 1, is characterized in that, described collimated light source comprises generating laser, and correspondingly, described light receiver portion comprises laser pickoff.

3. fan impeller locking device according to claim 1, is characterized in that, described reflective portions comprises holophote.

4. fan impeller locking device according to claim 3, it is characterized in that, described control unit judges that whether described rotating speed is lower than the threshold value preset, and when judged result is yes and again receives described trigger signal, described stop pin is driven to insert in described locking aperture, to be locked by described impeller.

5. fan impeller locking device according to claim 1, is characterized in that, namely described optics trigger element sent trigger signal to described control unit before described locking aperture is aimed at described stop pin; Described control unit after receiving described trigger signal, the rotating speed rotated relative to described stator main shaft according to described rotatingshaft and namely certain precompensation time start to drive described stop pin to lock in advance.

6. fan impeller locking device according to claim 4, is characterized in that, namely described optics trigger element sent trigger signal to described control unit before described locking aperture is aimed at described stop pin; Described control unit after receiving described trigger signal, the rotating speed rotated relative to described stator main shaft according to described rotatingshaft and namely certain precompensation time start to drive described stop pin to lock in advance.

7. fan impeller locking device according to claim 1, is characterized in that, also comprises the position-sensing switch being arranged at described stop pin end,

Described position-sensing switch is used for sending to described control unit the signal that puts in place after the interior edge face touching described locking aperture, and described control unit stops driving described stop pin after the signal that puts in place described in receiving.

8. fan impeller locking device according to claim 7, is characterized in that, described position-sensing switch comprises touch sensor.

9. according to the fan impeller locking device in claim 1-8 described in any one, it is characterized in that, the quantity of described locking aperture is at least one, and the quantity of described stop pin is corresponding with at least one locking aperture described with position.

10. fan impeller locking device according to claim 9, is characterized in that, the locking direction of described stop pin and locking aperture is axis along described rotatingshaft and/or radial direction.

11. 1 kinds of wind power generating set, comprise impeller, it is characterized in that, also comprise the fan impeller locking device in claim 1-10 described in any one, for locking described impeller.