CN102434404A - Fan and tower drum thereof - Google Patents

Abstract

The invention discloses a fan and its tower. The disclosed tower has at least one damping component and at least one rope for hoisting the tower platform. One end of each rope is fixed to the tower, and the other end is connected to the tower platform; Both ends of the damping component are respectively connected to the inner wall of the tower and the platform of the tower. In this invention, the tower platform of the tower has a vibration damping function, and no other special vibration damping mechanism is required, so as to achieve the purpose of reducing load and effectively controlling costs; secondly, the design of the rope makes the vibration damping of the tower platform independent of the wind direction. It can effectively reduce the vibration and deformation of the tower in any direction; moreover, compared with the existing technology, the connection method between the tower platform and the tower is improved from welding to hoisting, which can reduce the number of welding points on the tower , to avoid the influence of welding stress and deformation on the tower, and the hoisting method reduces the space layout restrictions on the tower platform inside the tower.

Description

A kind of wind turbine and its tower

technical field

The invention relates to the technical field of wind turbines, in particular to a wind turbine and its tower.

Background technique

A wind turbine generally includes a tower, a nacelle and blades. The tower is fixed on the machine base to support the nacelle and the blades. That is, the tower is the main load-bearing structure, and its height is generally more than 70m, and it is mostly a slender conical structure. Therefore, the tower will produce significant vibration and large deformation under the action of blade operation, wind load and earthquake, which will affect the work of the transmission system in the nacelle and ultimately affect the efficiency of wind turbine power generation. Therefore, it is more important to make the tower tube have a good vibration damping function. In order to achieve the purpose of vibration reduction, it is necessary to install a vibration damping mechanism inside the tower tube.

Since the tower is usually a slender circular frustum structure, its internal space itself is limited, and the tower needs to be equipped with a tower platform (mainly used for falling objects and for operators to rest), ladders, cables and other structures. After setting the above structure, the surplus space inside the tower is small, and some space needs to be left for the operator to operate. Therefore, there is not enough space inside the tower to install the vibration damping mechanism. Even if it is installed, the vibration damping mechanism provided in the limited space cannot meet the vibration damping requirements.

In view of this, how to provide a tower so that its vibration-damping mechanism satisfies the spatial arrangement of the tower and can achieve a better vibration-damping function is a technical problem to be solved by those skilled in the art.

Contents of the invention

In order to solve the above technical problems, the purpose of the present invention is to provide a tower, the tower platform inside the tower is hoisted inside the tower by ropes, and a damping part is also provided between the tower platform and the inner wall of the tower, so that the tower The tube uses its own tower platform and damping components to achieve vibration reduction without being limited by the internal space of the tower. Another object of the present invention is to provide a fan comprising the above-mentioned tower.

In order to achieve the first object of the present invention, the present invention provides a tower, which has a tower platform inside, and at least one damping component and at least one rope for hoisting the tower platform inside the tower, each of the One end of the rope is fixed relative to the tower, and the other end is connected to the tower platform; both ends of each of the damping components are respectively connected to the inner wall of the tower and the tower platform.

Preferably, the tower platform has a platform annular groove with a notch downward, one end of the damping component passes through the outer wall of the platform annular groove and is connected to the inner wall of the tower platform, and the other end of the damping component Connect the inner wall of the annular groove of the platform.

Preferably, the damping components are uniformly distributed along the circumference of the tower; and the damping components are hydraulic dampers.

Preferably, the tower platform is arranged on the upper part of the tower, one end of the rope is connected to the engine room at the top of the tower, and the other end of the rope is connected to the tower platform.

Preferably, a slewing bearing is also provided, the outer ring of the slewing bearing is fixed to the tower platform, and the other end of the rope is connected to the inner ring of the slewing bearing.

Preferably, the tower platform has a central hole; and the peripheral wall of the central hole has an upward annular stepped surface, and the slewing bearing is placed on the annular stepped surface and fixed to the peripheral wall of the central hole.

Preferably, the tower platform is provided on both the middle and lower parts of the tower, the middle part of the tower has a first connecting flange connected to the upper part, and the lower part of the tower has a second connecting flange connected to the middle part; The ropes connected to the middle tower platform are connected to the first connecting flange; the ropes connected to the lower tower platform are connected to the second connecting flange.

Preferably, a buffer ring is provided between the inner wall of the tower and the outer peripheral wall of the tower platform.

Preferably, the inner wall of the tower is fixed with a support ring, the support ring has a support ring groove with a notch facing the radial direction of the tower, the buffer ring is placed in the support ring and protrudes from the support ring outside the slot.

In this invention, the tower platform is hoisted inside the tower by ropes, and a damping component is provided between the tower platform and the inner wall of the tower. Then when the tower vibrates, the vibration is transmitted to the tower platform through the rope, and the tower platform vibrates accordingly, and its vibration phase lags behind the vibration phase of the tower, so the tower will be subjected to a force opposite to the vibration direction, thus causing to the damping effect. At the same time, the damping component can limit the vibration amplitude of the tower tube platform from being too large, and the damping component can consume a part of the vibration energy of the tower tube platform and the tower tube, so as to achieve a vibration reduction effect. The vibration reduction system of the tower mainly uses the tower platform structure of the tower, so that the tower platform not only has the basic functions of preventing falling objects and providing rest places, but also has the function of vibration reduction at the same time, that is, no need to set Other special damping mechanism, so as to achieve the purpose of load reduction and effective cost control; secondly, the design of the rope makes the vibration damping of the tower platform not limited by the wind direction, and the direction can be adjusted at will, effectively reducing the vibration of the tower in any direction. vibration and deformation; moreover, compared with the existing technology, the connection between the tower platform and the tower is improved from welding to hoisting, which can reduce the number of welding points on the tower and avoid the influence of welding stress and deformation on the tower , and the hoisting method reduces the space layout restrictions on the tower platform inside the tower.

To achieve another objective of the present invention, the present invention also provides a wind turbine, which has a tower, a nacelle and blades, and the tower is the tower described in any one of the above. Since the above-mentioned tower has the above-mentioned technical effect, the fan with the tower also has the same technical effect.

Description of drawings

Fig. 1 is a structural schematic diagram of a specific embodiment of the tower tube provided by the present invention, this figure only shows the top of the tower tube;

Fig. 2 is a sectional view along the direction A of Fig. 1;

Fig. 3 is a partial enlarged schematic diagram of the I part in Fig. 1;

Fig. 4 is a schematic structural view of another embodiment of the tower provided by the present invention.

Among them, the inner wall 21 of the tower, the tower platform 22, the rope 23, the hydraulic damper 24, the ladder 25, the buffer ring 211, the support ring 212, the hinged support 213, the first connecting flange 214, the second connecting flange 215 , slewing bearing 221, platform annular groove 222, center hole 223.

Detailed ways

The core of the present invention is to provide a fan and a tower. The tower platform inside the tower is hoisted inside the tower by ropes. There is also a damping part between the tower platform and the inner wall of the tower. The tower utilizes its own The unique tower platform and damping components together achieve vibration reduction without being limited by the internal space of the tower.

In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. For ease of understanding and concise description, an overall description will be given below in conjunction with the fan and the tower, and the beneficial effects will not be discussed repeatedly.

Please refer to Fig. 1 and Fig. 2. Fig. 1 is a schematic structural diagram of a specific embodiment of the tower provided by the present invention, which only shows the upper part of the tower; Fig. 2 is a sectional view along the direction A of Fig. 1 .

A wind turbine generally includes a tower, a nacelle, and blades. The nacelle is located at the top of the tower. The tower in this specific embodiment has a tower platform 22 inside. The tower platform 22 can be made of steel plates to prevent falling objects and supply The role of operator rest. The tower platform 22 may have a through hole for the ladder 25 to pass through, and a hoisting hole for hoisting, so as to place or lift objects on the tower platform 22 . In addition, there is at least one damping component and at least one rope 23 for hoisting the tower platform 22 inside the tower, and the rope 23 may be a steel wire rope.

One end of the rope 23 is connected to the cabin at the upper end of the tower, that is, the rope 23 is fixed relative to the tower, and the other end of the rope 23 is connected to the tower platform 22, and the rope 23 hoistes the tower platform 22 in the tower. The number of ropes 23 shown in FIG. 1 is two, of course, the number of ropes 23 can be appropriately increased according to actual needs.

The damping component shown in FIG. 1 is a hydraulic damper 24 , one end of the hydraulic damper 24 is connected to the inner wall 21 of the tower, and the other end is connected to the tower platform 22 . Then when the tower vibrates, the tower platform 22 vibrates accordingly, and its vibration phase lags behind the vibration phase of the tower, then the tower will be subjected to a force opposite to the vibration direction, thereby playing the role of vibration reduction, that is, the tower Platform 22 corresponds to a mass damper. Due to the heavy weight of the tower platform 22, in order to avoid the large displacement caused by the vibration of the tower platform 22, which will affect the safety and stability of the tower, the hydraulic damper 24 can limit the excessive vibration amplitude of the tower platform 22, and the hydraulic damper 24 can Consume a part of the vibration energy of the tower platform 22 and the tower to play a vibration damping effect. Then the hydraulic damper 24 and the tower platform 22 are combined to form a vibration damping mechanism of the tower, and the vibration damping mechanism has the comprehensive characteristics of mass and damping, so as to realize the vibration reduction of the tower smoothly and effectively.

The technical effects achieved by the above scheme are as follows: First, the vibration reduction system of the tower mainly utilizes the structure of the tower platform 22 of the tower, so that the tower platform 22 can be used in addition to basic functions such as preventing falling objects and providing rest places. , and at the same time have the function of vibration reduction, that is, there is no need to set up other special vibration reduction mechanisms, so as to achieve the purpose of load reduction and effective cost control; second, the design of the rope 23 makes the vibration reduction of the tower platform 22 not limited by the wind direction , the direction can be adjusted at will, effectively reducing the vibration and deformation of the tower in any direction; third, compared with the prior art, the connection between the tower platform 22 and the tower is improved from welding to hoisting, which can reduce the The number of welding points on the tower avoids the influence of welding stress and deformation on the tower, and the hoisting method reduces the space layout restrictions on the tower platform 22 inside the tower.

In the above embodiment, four sets of hydraulic dampers 24 are arranged in total, as shown in FIG. 2 , and the four sets of hydraulic dampers 24 are evenly distributed along the circumference of the tower, so when the tower platform 22 vibrates in all directions, the vibration amplitude will be affected by the hydraulic dampers. 24 to ensure the safety of the tower platform 22 vibration reduction, the hydraulic damper 24 itself also plays the role of reducing the vibration of the tower in all directions; in addition, multiple hydraulic dampers 24 are connected to the tower platform 22, and can It plays a certain supporting role for the tower platform 22 and maintains the stability of the tower platform 22.

The specific connection method of the hydraulic damper 24 inside the tower can continue to refer to FIG. 1 in conjunction with FIG. 3 . FIG. 3 is a partially enlarged schematic diagram of part I in FIG. 1 .

The tower platform 22 can have a platform annular groove 222 with a notch downward, and one end of the hydraulic damper 24 extends through the outer wall of the platform annular groove 222 to the inner wall 21 of the tower, and is fixed with the inner wall, and the other end is connected with the platform annular The fixing of the inner wall of the groove 222. This connection method can ensure the reliable connection between the hydraulic damper 24 and the tower platform 22, and also makes the space more compact. In addition, in FIG. 3 , the inner wall 21 of the tower is provided with a hinged support 213 , and one end of the hydraulic damper 24 is hinged to the hinged support 213 to enhance the flexibility of the hydraulic damper 24 for vibration reduction.

Of course, for the various embodiments herein, the hydraulic damper 24 can also use other types of damping components, such as: hydraulic cylinders, air cylinders, springs, etc. Of course, compared with such damping components, the damping of the hydraulic damper 24 can be adjusted , which can eliminate the hysteresis phenomenon caused by the poor vibration sensitivity of the system caused by the internal friction of the damper.

Because the vibration of the upper part of the tower is relatively obvious, the tower platform 22 can be arranged on the upper part of the tower, and one end of the rope 23 is connected to the engine room (not shown in Fig. 1 ) at the top of the tower, and the other end of the rope 23 is connected to the tower. The platform 22 simply realizes the hoisting of the tower platform 22 . When the tower platform 22 is hoisted on the upper part of the tower, a slewing bearing 221 can be provided. The outer ring of the slewing bearing 221 is fixed to the tower platform 22 , and the inner ring of the slewing bearing 221 is fixed to the rope 23 . Since the rope 23 is connected to the nacelle, when the nacelle yaws, the rope 23 will rotate accordingly, and drive the inner ring to rotate relative to the outer ring and the tower platform 22, so the tower platform 22 can keep the current position unchanged, and the rope 23 will also rotate. There will be no twisting phenomenon, therefore, the hoisting of the tower tube platform 22 is relatively stable, and is not affected by the rotation of the rope 23 .

A central hole 223 can be processed on the tower platform 22, and the central hole 223 can be used for the cables at the top cabin to pass through, which is convenient for arrangement and improves the space utilization rate inside the tower. The hole wall of the central hole 223 can have an upward annular step surface, then the slewing bearing 221 can be placed on the annular step surface, and its outer ring is fixed to the hole wall of the central hole 223, thereby realizing the stable and reliable support between the slewing bearing 221 and the tower platform. 22 mounting fixed.

According to actual vibration reduction requirements, tower platforms 22 can be provided at the middle and lower parts of the tower. Please continue to refer to FIG. 4 , which is a structural schematic diagram of another specific embodiment of the tower provided by the present invention.

The upper, middle, and lower parts of the tower can be connected by flanges. As shown in Figure 4, the top of the middle tower has a first connecting flange 214 for connecting the flange at the bottom of the upper tower, and the top of the lower tower has a first connecting flange 214. The second connecting flange 215 is used to connect the flange at the bottom of the middle tower. Then when the tower platform 22 is set in the middle, one end of the rope 23 can be connected to the first connecting flange 214, and the other end can be connected to the tower platform 22; when the tower platform 22 is set in the lower part, one end of the rope 23 can be connected to the second connecting flange 215 , the other end is connected to the tower tube platform 22. The principle is the same as that of the above-mentioned embodiment, when the tower platform 22 is set in the middle and the lower part, damping parts are also set to connect the tower platform 22 and the inner wall 21 of the tower, the specific setting method, the number of setting and the installation position are similar to the above-mentioned embodiment, I won't go into details here.

It should be noted that when the tower platform 22 is set at the middle and lower parts, since the rope 23 is connected to the flange, there is no rotation, so the middle and lower tower platforms 22 do not need to be provided with a slewing bearing 221, as shown in FIG. 4 , The rope 23 can be directly connected to the tower platform 22; the tower platform 22 does not need to be provided with a central hole 223, so the structure of the middle and lower tower platforms 22 can be simplified.

In this embodiment, each tower platform 22 is located in different sections of the tower and does not interfere with each other. Since the vibration frequency of each section may be different, towers with different weights can be selected according to the actual vibration conditions of each section. The platform 22 may adjust the stiffness of the damping components to achieve the purpose of vibration reduction in divided frequency bands, so that the vibration reduction effect is more optimized.

For any of the above embodiments, a buffer ring 211 may be provided between the inner wall 21 of the tower and the outer peripheral wall of the platform 22 of the tower. The buffer ring 211 is made of elastic material, so the buffer ring 211 can play an effective buffering and vibration reduction function when the tower platform 22 interferes or collides with the inner wall of the tower. In order to facilitate the installation of the buffer ring 211, the inner wall 21 of the tower can fix the support ring 212. The support ring 212 has a support ring groove with a notch facing the radial direction of the tower. The buffer ring 211 is placed in the support ring 212 and protrudes from the support ring. Outside the annular groove, that is, to ensure that the tower platform 22 undergoes a large displacement, the buffer ring 211 can be in contact with the outer peripheral wall of the tower platform 22 . The support ring 212 can be made of high-strength metal material, so that the installation of the buffer ring 211 is more reliable. Certainly, the support buffer ring 211 may also be arranged on the outer peripheral wall of the tower platform 22 .

The fan and its tower provided by the present invention have been introduced in detail above. In this paper, specific examples are used to illustrate the principle and implementation of the present invention, and the descriptions of the above embodiments are only used to help understand the method and core idea of the present invention. It should be pointed out that for those skilled in the art, without departing from the principle of the present invention, some improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims (10)

1. tower tube; Its inside has tower barrel platform, it is characterized in that, the inside of tower tube also has the rope of at least one damped part and at least one said tower barrel platform of lifting; One end of each said rope is fixed with respect to said tower tube, and the other end connects said tower barrel platform; The two ends of each said damped part connect the inwall and the said tower barrel platform of said tower tube respectively.

2. tower tube according to claim 1; It is characterized in that; Said tower barrel platform has the downward platform circular groove of notch; One end of said damped part runs through the outer wall of said platform circular groove and is connected in the inwall of said tower barrel platform, and the other end of said damped part connects the inwall of said platform circular groove.

3. tower tube according to claim 2 is characterized in that, said damped part circumferentially is uniformly distributed with along said tower tube; And said damped part is a hydraulic damper.

4. according to each described tower tube of claim 1 to 3, it is characterized in that said tower barrel platform is located at the top of said tower tube, an end of said rope connects the cabin at tower tube top, and the other end of said rope connects said tower barrel platform.

5. tower tube according to claim 4; It is characterized in that also be provided with floating bearing, said tower barrel platform is fixed in the outer ring of said floating bearing; One end of said rope connects the cabin at tower tube top, and the other end of said rope connects the inner ring of said floating bearing.

6. tower tube according to claim 5 is characterized in that said tower barrel platform has center hole; And the perisporium of said center hole has annular table terrace upwards, and said floating bearing places on the said annular table terrace, and fixes with said center hole perisporium.

7. tower tube according to claim 1 is characterized in that the middle part of said tower tube and bottom are equipped with said tower barrel platform, and the middle part of tower tube has first adpting flange that is connected with top, and the bottom of tower tube has second adpting flange that is connected with the middle part; The rope that connects the tower barrel platform at middle part is connected in first adpting flange; The rope that connects the tower barrel platform of bottom is connected in second adpting flange.

8. according to claim 1 to 3,7 each described tower tubes, it is characterized in that, be provided with buffering ring between the inwall of said tower tube and the periphery wall of said tower barrel platform.

9. tower tube according to claim 8 is characterized in that the inwall of said tower tube is fixed with support ring, said support ring have notch towards the tower barrel dliameter to the support circular groove, said buffering ring places in the said support ring and protrudes from outside the said support circular groove.

10. a blower fan has tower tube, cabin and blade, it is characterized in that, said tower tube is each described tower tube of claim 1 to 9.

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