A damper for wind turbine tower

Abstract

The utility model provides a damper for a wind turbine tower, comprising a wind turbine tower body and a connecting ring, wherein the left and right sides and the front and rear sides of the lower end face of the lifting frame are symmetrically connected with lifting wire ropes, a damping component for reducing the swing amplitude of the wind turbine tower body is arranged below the lifting frame, and a sealing component is arranged on the upper end of the damping component. When the counterweight steel powder inside the storage barrel needs to be replaced, the fixing nut and the fixing screw are first disassembled with the help of an external wrench, and then the sealing cover can be moved upward and disassembled, and the counterweight steel powder inside the storage barrel can be replaced at this time, because the storage barrel is hoisted inside the wind turbine tower body by an annular lifting plate, a connecting ring, a lifting wire rope and a lifting frame, the storage barrel with the counterweight steel powder added inside will also swing to generate a reaction force and cooperate with the viscous damper to offset most of the swing force of the wind turbine tower body, thereby ensuring the stability of the use of the wind turbine tower body.

Description

Technical Field

[0001] The utility model relates to the technical field of wind power towers, in particular to a damper for a wind power tower. Background Art

[0002] The wind turbine tower is the tower pole of wind power generation. It mainly plays a supporting role in the wind turbine generator set and absorbs the vibration of the set. The construction of the wind turbine tower needs to deal with "vortex-induced vibration". The vortex-induced vibration of the wind turbine tower is a wind-induced vibration phenomenon that occurs in a large-span tower at low wind speed. The effect is that the wind turbine tower swings and is prone to breakage and damage. In response to the vortex-induced vibration of the wind turbine tower, spoiler strips are installed on the tower during tower construction to disrupt the trajectory of the wind so that it cannot form a vortex with a stable frequency, thereby avoiding destructive vortex-induced vibration caused by matching the tower's own frequency. Afterwards, a damping structure is installed inside the tower. The damping structure uses the inertial force in the opposite direction of the pendulum to significantly suppress the response amplitude of the tower vibration.

[0003] Publication No. "CN220320191U" provides a damping structure for a wind turbine tower. By setting a damping component, the counterweight plate is changed to steel powder. The steel powder is in the form of fine particles but has a high density, which is convenient for multiple handling and transportation to reduce work intensity. After the steel powder is filled into a stuffing barrel, the weight of the stuffing barrel is not much lower than that of the pendulum ball and the counterweight plate. At the same time, a reinforced base frame is arranged in the stuffing barrel to increase the structural strength of the bottom of the stuffing barrel, so as to avoid the pressure concentrated in one corner of the bottom of the stuffing barrel when the stuffing barrel swings, causing the stuffing barrel to rupture. This further facilitates the handling of the damping structure, and the high structural strength allows it to be used for a long time.

[0004] However, the above technical solutions and the prior art have the following defects:

[0005] Although the wind turbine tower uses a damping structure to change the counterweight plate into steel powder, which is convenient for multiple handling and transportation and thus reduces the workload, the steel powder will rust and fail due to absorption of surrounding moisture during use. The rusted and failed steel powder will affect the counterweight effect of the filling barrel, so it needs to be replaced regularly. However, the installation of the pressure plate and torsion spring will make it inconvenient to take out and replace the steel powder after it is added to the filling barrel, and its practicality needs to be improved. Utility Model Content

[0006] The utility model aims to provide a damper for a wind power tower to solve the problems raised in the above-mentioned background technology.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A damper for a wind turbine tower comprises a wind turbine tower body, a hoisting frame, a hoisting wire rope and a connecting ring, wherein the hoisting frame is fixedly connected to the inside of the wind turbine tower body, the left and right sides and the front and rear sides of the lower end surface of the hoisting frame are symmetrically connected to the hoisting wire ropes, the upper and lower ends of the hoisting wire ropes are provided with connecting rings, a damping component for reducing the swing amplitude of the wind turbine tower body is provided below the hoisting frame, a sealing component is provided on the upper end of the damping component, and the sealing component can not only improve the sealing performance of the damping component, but also facilitate the later maintenance personnel to disassemble and maintain the damping component.

[0009] Preferably, the damping assembly includes a sealing cover, a material storage barrel, a reinforcement seat, a bottom connecting seat, an annular lifting plate, a viscous damper and a spherical connecting seat. The material storage barrel is installed below the lifting frame, the sealing cover is installed on the upper end of the material storage barrel, an annular lifting plate is arranged on the upper side of the annular side of the material storage barrel, a reinforcement seat is arranged at the bottom of the material storage barrel, a bottom connecting seat is arranged at the bottom of the reinforcement seat, a viscous damper is installed on the annular side of the bottom connecting seat, and spherical connecting seats are arranged at both ends of the viscous damper.

[0010] Preferably, the sealing assembly includes a sealing annular plate, a first sealing ring, a second sealing ring and an installation through hole. A sealing annular plate is provided on the upper side of the annular side surface of the storage barrel, a first sealing ring is installed on the upper end surface of the sealing annular plate, a second sealing ring is installed on the upper end surface of the storage barrel, and installation through holes are symmetrically provided on the left and right sides and the front and back sides of the sealing cover.

[0011] Preferably, a fixing screw is installed inside the mounting through hole, and the fixing screw is a high-strength bolt, and a fixing nut is installed on the lower side of the annular side surface of the fixing screw, and the fixing nut is a locking nut.

[0012] Preferably, a height scale line is provided on the rear side of the inner annular side surface of the storage barrel, and weight steel powder is added inside the storage barrel.

[0013] Preferably, reinforcement plates are symmetrically fixedly connected to the left and right sides and the front and rear sides of the lower end surface of the annular hanging plate, and a handle is provided on the upper end surface of the blocking cover.

[0014] Preferably, the first sealing ring and the second sealing ring are both made of fluororubber.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The utility model can remove the fixing nut and the fixing screw by means of an external wrench, and then the blocking cover can be moved upward and removed, and the counterweight steel powder inside the storage barrel can be replaced at this time. After the replacement is completed, the blocking cover is placed on the upper end of the storage barrel, and then the blocking cover is fixed by means of the fixing screw and the fixing nut. In addition, the first sealing ring and the second sealing ring make the sealing performance between the blocking cover and the sealing annular plate and the storage barrel better, thereby extending the replacement cycle of the counterweight steel powder inside the storage barrel, and having good practicality;

[0017] 2. When the wind turbine tower body shakes in windy weather, the storage barrel is hoisted inside the wind turbine tower body by an annular hoisting plate, a connecting ring, a hoisting wire rope and a hoisting frame. Therefore, the storage barrel with counterweight steel powder added inside will also shake and generate a reaction force and cooperate with the viscous damper to offset most of the shaking force of the wind turbine tower body, thereby ensuring the stability of the wind turbine tower body. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the main structure of the utility model;

[0019] Figure 2 It is a structural diagram of the damping component in the utility model;

[0020] Figure 3 It is a front cross-sectional view of the damping component in the utility model;

[0021] Figure 4 This is a structural diagram of the utility model when the blocking cover is disassembled;

[0022] Figure 5 for Figure 3 A partial enlarged view of .

[0023] In the figure: 1. Wind turbine tower body; 2. Hoisting frame; 3. Damping assembly; 31. Sealing cover; 32. Storage barrel; 321. Height scale line; 33. Reinforcement seat; 34. Bottom connecting seat; 35. Annular hoisting plate; 351. Reinforcement plate; 36. Viscous damper; 37. Spherical connecting seat; 4. Sealing assembly; 41. Fixing nut; 42. Sealing annular plate; 43. First sealing ring; 44. Second sealing ring; 45. Mounting through hole; 46. Fixing screw; 5. Hoisting wire rope; 6. Connecting ring. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1-5 , the utility model provides a technical solution:

[0026] Embodiment 1:

[0027] A damper for a wind turbine tower comprises a wind turbine tower body 1, a hoisting frame 2, a hoisting wire rope 5 and a connecting ring 6. The wind turbine tower body 1 is fixedly connected with the hoisting frame 2 inside. The left and right sides and the front and rear sides of the lower end surface of the hoisting frame 2 are symmetrically connected with the hoisting wire rope 5. The upper and lower ends of the hoisting wire rope 5 are provided with connecting rings 6. The connecting ring 6 is connected to the hoisting frame 2 and an annular hoisting plate 35 by welding. The hoisting frame 2 will hoist and limit the annular hoisting plate 35 through the hoisting wire rope 5 and the connecting ring 6. A damping component 3 for reducing the shaking amplitude of the wind turbine tower body 1 is arranged below the hoisting frame 2. A sealing component 4 is arranged on the upper end of the damping component 3. The sealing component 4 can not only improve the sealing performance of the damping component 3, but also facilitate the later maintenance personnel to disassemble and maintain the damping component 3.

[0028] The damping assembly 3 includes a blocking cover 31, a material storage barrel 32, a reinforcement seat 33, a bottom connecting seat 34, an annular lifting plate 35, a viscous damper 36 and a spherical connecting seat 37. A material storage barrel 32 is installed below the lifting frame 2, and the material storage barrel 32 is connected to the annular lifting plate 35 and the reinforcement seat 33 by welding. The material storage barrel 32 is not only convenient for storing counterweight steel powder, but also applies a downward pulling force to the lifting wire rope 5 through the annular lifting plate 35. A blocking cover 31 is installed on the upper end of the material storage barrel 32, and the blocking cover 31 will block the opening at the upper end surface of the material storage barrel 32. An annular lifting plate 35 is arranged on the upper side of the annular side surface of the material storage barrel 32. The annular lifting plate 35 facilitates the lifting of the material storage barrel 32 by the lifting wire rope 5 through the connecting ring 6. A reinforcement seat 33 is arranged at the bottom of the material storage barrel 32. The reinforcement seat 33 can further improve the structural strength of the bottom of the material storage barrel 32 and prevent the bottom of the material storage barrel 32 from easily deforming.

[0029] A bottom connecting seat 34 is provided at the bottom of the reinforcement seat 33, and the bottom connecting seat 34 is connected to the reinforcement seat 33 by welding. The bottom connecting seat 34 facilitates the viscous damper 36 to be supported by the spherical connecting seat 37. The viscous damper 36 is installed on the annular side of the bottom connecting seat 34. The viscous damper 36 has the ability to damp and stop vibration. Since the internal detailed structure and working principle of the viscous damper 36 are relatively mature technologies in the prior art, they will not be described in detail here. Spherical connecting seats 37 are provided at both ends of the viscous damper 36. The spherical connecting seats 37 facilitate the viscous damper 36 to be respectively connected to the bottom connecting seat 34 and the wind tower body 1 The material storage barrel 32 is movably connected, and a height scale line 321 is provided on the rear side of the inner annular side surface of the material storage barrel 32. The height scale line 321 is convenient for the installer to observe the pouring amount in real time when adding counterweight steel powder into the material storage barrel 32, so that the addition of counterweight steel powder is more accurate. Counterweight steel powder is added inside the material storage barrel 32, and the counterweight steel powder can further increase the deadweight of the material storage barrel 32. The left and right sides and the front and rear sides of the lower end surface of the annular hanging plate 35 are symmetrically fixedly connected with reinforcing plates 351. The reinforcing plates 351 make the connection between the annular hanging plate 35 and the material storage barrel 32 more stable. The upper end surface of the blocking cover 31 is provided with a handle, and the handle is convenient for the installer to disassemble and assemble the blocking cover 31 by hand.

[0030] Embodiment 2:

[0031] On the basis of Example 1, in this embodiment, the fixing nut 41 and the fixing screw 46 are disassembled with the help of an external wrench, and then the sealing cover 31 can be moved up and disassembled. At this time, the counterweight steel powder inside the storage barrel 32 can be replaced. After the replacement is completed, the sealing cover 31 is placed on the upper end of the storage barrel 32, and then the sealing cover 31 is fixed with the help of the fixing screw 46 and the fixing nut 41. The first sealing ring 43 and the second sealing ring 44 make the sealing between the sealing cover 31 and the sealing annular plate 42 and the storage barrel 32 better, thereby extending the replacement cycle of the counterweight steel powder inside the storage barrel 32.

[0032] The sealing assembly 4 includes a sealing annular plate 42, a first sealing ring 43, a second sealing ring 44 and a mounting through hole 45. A sealing annular plate 42 is arranged on the upper side of the annular side surface of the material storage barrel 32. The sealing annular plate 42 facilitates the fixing of the sealing cover 31 by the fixing screw 46 and the fixing nut 41. A first sealing ring 43 is installed on the upper end surface of the sealing annular plate 42, and a second sealing ring 44 is installed on the upper end surface of the material storage barrel 32. The first sealing ring 43 and the second sealing ring 44 are both made of fluororubber. The first sealing ring 43 and the second sealing ring 44, both of which are made of fluororubber, ensure better sealing between the sealing cover 31 and the sealing annular plate 42 and the material storage barrel 32.

[0033] The sealing cover 31 has symmetrically provided installation holes 45 on the left and right sides and the front and back sides. The installation holes 45 match the fixing screws 46. The installation holes 45 facilitate the fixing screws 46 to be inserted into the sealing cover 31. The fixing screws 46 are installed in the installation holes 45. The fixing screws 46 are high-strength bolts. The fixing screws 46 are high-strength bolts with high strength and are not easy to break. A fixing nut 41 is installed on the lower side of the annular side of the fixing screw 46. The fixing nut 41 is an anti-loosening nut. The fixing nut 41 is an anti-loosening nut and will not easily loosen or fall off during use.

[0034] Working principle: When the wind turbine tower body 1 shakes in windy weather, since the storage barrel 32 is hoisted inside the wind turbine tower body 1 through the annular hoisting plate 35, the connecting ring 6, the hoisting wire rope 5 and the hoisting frame 2, the storage barrel 32 with the counterweight steel powder added inside will also shake and generate a reaction force and cooperate with the viscous damper 36 to offset most of the shaking force of the wind turbine tower body 1, thereby ensuring the stability of the wind turbine tower body 1. The reinforcing seat 33 can further improve the structural strength of the bottom of the storage barrel 32 to prevent the bottom of the storage barrel 32 from easily Deformation occurs; in the later use process, when the counterweight steel powder inside the storage barrel 32 needs to be replaced, the installer first loosens and removes the fixing nut 41 with the help of an external wrench, and then pulls and removes the fixing screw 46. At this time, you only need to hold the handle to move the sealing cover 31 up and remove it, and then you can replace the counterweight steel powder inside the storage barrel 32. After the replacement is completed, the installer places the sealing cover 31 on the upper end of the storage barrel 32, and then fixes the sealing cover 31 with the help of the fixing screw 46 and the fixing nut 41.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A damper for a wind turbine tower, comprising a wind turbine tower body (1), a hoisting frame (2), a hoisting wire rope (5) and a connecting ring (6), characterized in that: The wind turbine tower body (1) is fixedly connected to a hanging frame (2), and the left and right sides and the front and rear sides of the lower end surface of the hanging frame (2) are symmetrically connected to hanging steel wire ropes (5), and the upper and lower ends of the hanging steel wire ropes (5) are provided with connecting rings (6); A damping assembly (3) for reducing the swing amplitude of the wind turbine tower body (1) is arranged below the hoisting frame (2); a sealing assembly (4) is arranged at the upper end of the damping assembly (3); and the sealing assembly (4) can not only improve the sealing performance of the damping assembly (3), but also facilitate the subsequent maintenance personnel to disassemble and maintain the damping assembly (3).

2. A wind turbine tower damper according to claim 1, characterized in that: The damping assembly (3) comprises a blocking cover (31), a material storage barrel (32), a reinforcement seat (33), a bottom connecting seat (34), an annular hanging plate (35), a viscous damper (36) and a spherical connecting seat (37); a material storage barrel (32) is installed below the hanging frame (2); a blocking cover (31) is installed at the upper end of the material storage barrel (32); an annular hanging plate (35) is arranged on the upper side of the annular side of the material storage barrel (32); a reinforcement seat (33) is arranged at the bottom of the material storage barrel (32); a bottom connecting seat (34) is arranged at the bottom of the reinforcement seat (33); a viscous damper (36) is installed on the annular side of the bottom connecting seat (34); and spherical connecting seats (37) are arranged at both ends of the viscous damper (36).

3. A wind turbine tower damper according to claim 2, characterized in that: The sealing assembly (4) comprises a sealing annular plate (42), a first sealing ring (43), a second sealing ring (44) and a mounting through hole (45); a sealing annular plate (42) is arranged on the upper side of the annular side surface of the material storage barrel (32); a first sealing ring (43) is installed on the upper end surface of the sealing annular plate (42); a second sealing ring (44) is installed on the upper end surface of the material storage barrel (32); and mounting through holes (45) are symmetrically provided on the left and right sides and the front and rear sides of the interior of the blocking cover (31).

4. A wind turbine tower damper according to claim 3, characterized in that: A fixing screw (46) is installed inside the installation through hole (45), and the fixing screw (46) is a high-strength bolt. A fixing nut (41) is installed on the lower side of the annular side surface of the fixing screw (46), and the fixing nut (41) is a locking nut.

5. A wind turbine tower damper according to claim 2, characterized in that: A height scale line (321) is provided on the rear side of the inner annular side surface of the material storage barrel (32), and weight steel powder is added inside the material storage barrel (32).

6. A wind turbine tower damper according to claim 2, characterized in that: The left and right sides and the front and rear sides of the lower end surface of the annular hanging plate (35) are symmetrically fixedly connected with reinforcing plates (351), and the upper end surface of the blocking cover (31) is provided with a handle.

7. A wind turbine tower damper according to claim 3, characterized in that: The first sealing ring (43) and the second sealing ring (44) are both made of fluororubber.

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