Lightning protection assembly of wind turbine generator

Abstract

The utility model discloses a wind turbine generator lightning protection assembly, and belongs to the technical field of wind turbine generator lightning protection. Comprising a supporting pile, a wind power main machine and a wind power input shaft, the supporting pile is vertically fixed to the ground, the wind power main machine is fixed to the top end of the supporting pile, the wind power input shaft is rotationally arranged on the side face of the wind power main machine, and the rotating axial direction of the wind power input shaft extends in the horizontal direction; the supporting plate is fixed to the side face, opposite to the wind power input shaft, of the wind power host, the recycling barrel is fixed to the side, facing the ground, of the supporting plate, the supporting plate is hollow to form a recycling cavity, and the recycling barrel and the supporting plate sequentially penetrate through one end, away from the ground, of the recycling cavity to form a penetrating opening. According to the utility model, the lightning rod can be recycled, the corrosion of the lightning rod is prevented from being accelerated by an external wind and rain environment, the service life of the lightning protection assembly is prolonged, and the maintenance frequency of the lightning rod is reduced.

Description

Technical Field

[0001] This utility model relates to a lightning protection component for wind turbine generators, belonging to the field of lightning protection technology for wind turbine generators. Background Technology

[0002] Lightning protection is a crucial part of wind farm operation and maintenance. With the continuous increase in installed capacity, the number of lightning strikes on wind farms is showing a year-on-year upward trend. Lightning strikes cause severe damage to blades and turbine electrical control equipment, resulting in significant economic losses for turbine and blade manufacturers and owners. Lightning strikes have become one of the dangerous factors affecting the safe operation of wind turbines and the safe production of wind farms.

[0003] When using lightning rods for lightning protection in traditional wind turbines, the lightning rods need to be directly fixed to the wind turbines. In this case, the lightning protection equipment must always be located outdoors. After being exposed for a long time, the lightning protection equipment and its structure, such as the down conductor, will corrode, resulting in a reduced service life. Therefore, frequent manual maintenance and replacement are required to ensure the normal operation of the lightning protection equipment. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a lightning protection component for wind turbines, which solves the problem in the prior art that long-term exposure of lightning protection equipment will lead to a reduction in its service life and the need for frequent maintenance.

[0005] The technical problem to be solved by this utility model is achieved by the following technical solution: A lightning protection component for wind turbine generators includes a support pile, a wind turbine generator, and a wind turbine input shaft. The support pile is vertically fixed to the ground, the wind turbine generator is fixed to the top of the support pile, and the wind turbine input shaft is rotatably mounted on the side of the wind turbine generator with its rotation axis extending horizontally. The component also includes a support plate, a recovery cylinder, conductive sheets, a recovery block, a lightning rod, and a drive structure. The support plate is fixed to the side of the wind turbine generator opposite to the wind turbine input shaft, and the recovery cylinder is fixed to the side of the support plate facing the ground. The support plate has a hollow interior forming a recovery chamber. The end of the recovery chamber furthest from the ground sequentially receives the recovered components. The cylinder and support plate pass through to form a through opening. The recovery block is set inside the recovery chamber and slides along the extension direction of the recovery chamber. The lightning rod is fixed to the end face of the recovery block away from the ground. The drive structure is set inside the recovery chamber to drive the recovery block to slide. The conductive sheet is fixedly connected to the recovery cylinder. One end of the conductive sheet extends into the recovery chamber and passes through the recovery block along the extension direction of the recovery chamber. One end of the conductive sheet in the recovery chamber extends to the connection between the support plate and the recovery cylinder. The other end of the conductive sheet is located outside the recovery cylinder and extends to the ground along the extension direction of the support pile. A conductive terminal fixed to the lightning rod is set at the connection between the recovery block and the lightning rod. One end of the conductive terminal abuts against the conductive sheet.

[0006] By adopting the above technical solution, when the lightning rod is not in use, both the recovery block and the lightning rod are located inside the recovery chamber. At this time, the external environment cannot affect the lightning rod located inside the recovery chamber. When the lightning rod needs to be used, the drive structure starts and drives the recovery block to move towards the support plate, thereby causing the recovery block to drive the lightning rod towards the support plate. When the lightning rod is completely outside the recovery chamber, the drive structure stops moving. At this time, the lightning rod can be used normally as a lightning rod. The lightning rod conducts the guided current through the conductive terminals to the conductive sheet, and finally the conductive sheet conducts it to the ground, achieving the lightning protection effect of the wind turbine. In addition, the lightning rod can be recovered when not in use, avoiding the external wind and rain environment from accelerating the corrosion of the lightning rod, which is conducive to improving the service life of the lightning protection components and reducing the frequency of maintenance of the lightning rod.

[0007] The present invention is further configured such that: the drive structure includes a drive motor and a drive screw, the drive screw is rotatably disposed in the recycling chamber, the extension direction of the drive screw is the same as the sliding direction of the recycling block, one end of the drive screw passes through the recycling block and is threadedly connected to the recycling block, the drive motor is fixed on the recycling cylinder, and the drive motor is poweredly connected to the end of the drive screw away from the recycling block.

[0008] By adopting the above technical solution, after the drive motor starts, it drives the drive screw to rotate, thereby causing the recycling block to slide in the recycling chamber under the action of the thread structure, thus achieving the purpose of driving the recycling block to move.

[0009] The present invention is further configured such that: a sliding groove is provided on the portion of the conductive sheet located in the recovery chamber, the sliding groove extends along the extension direction of the conductive sheet, a sliding terminal block is slidably arranged in the sliding groove along the extension direction of the sliding groove, and the end of the conductive terminal away from the lightning rod is fixedly connected to the sliding terminal block.

[0010] By adopting the above technical solution, during the movement of the lightning rod following the recovery block, it is necessary to maintain contact between the conductive terminal and the conductive sheet at all times. By setting a sliding terminal block and fixing the conductive terminal to the sliding terminal block, the sliding terminal block can always be in close contact with the conductive sheet, ensuring that the circuit is always unobstructed, avoiding the phenomenon of incomplete connection and disconnection, and ensuring that the lightning protection component can operate normally.

[0011] The present invention is further configured such that: a flexible sealing membrane surrounding the through-hole is fixedly provided on the side of the support plate away from the recycling cylinder, and an opening for the lightning rod to pass through is provided at the end of the flexible sealing membrane away from the support plate, and the flexible sealing membrane seals the through-hole.

[0012] By adopting the above technical solution, the flexible sealing membrane can seal the penetration when the lightning rod is located in the recovery chamber, thereby preventing external wind and sand from entering the recovery chamber and preventing the recovery block from being jammed by foreign objects during the sliding process, thus further ensuring the normal operation of the lightning protection components.

[0013] The present invention is further configured such that: a first sliding rod is hinged to the opposite sides of the lightning rod on the support plate; a second sliding rod is inserted into the first sliding rod at the end face away from the hinge end; the second sliding rod can slide along the extension direction of the first sliding rod; a connecting ring is placed at the opening on the flexible sealing membrane through which the lightning rod passes; the connecting ring is fixed to the end of the second sliding rod on both sides of the lightning rod away from the first sliding rod; a limiting block is fixedly provided on the lightning rod; the limiting block can abut against the connecting ring to restrict the relative movement of the connecting ring and the lightning rod.

[0014] The present invention is further configured such that: the path of the second sliding rod sliding inside the first sliding rod forms an elastic cavity, and a return spring is provided inside the elastic cavity. One end of the return spring is fixed to the end of the second sliding rod inserted into the first sliding rod, and the other end of the return spring is fixed to the inner wall of the elastic cavity. The direction of the spring force of the return spring is the same as the sliding direction of the second sliding rod.

[0015] By adopting the above technical solution, when the lightning rod moves toward the support plate and its end passes through the opening of the flexible sealing membrane, the connecting ring is sleeved on the lightning rod and slides relative to the lightning rod. When the connecting ring abuts against the limiting block, the connecting ring moves with the lightning rod. At this time, the first sliding rod flips along the hinge and the second sliding rod is gradually pulled out from the elastic cavity. The reset spring is stretched. At this time, the second sliding rod and the first sliding rod provide horizontal support for the lightning rod, which helps to improve the stability of the lightning rod during use.

[0016] The beneficial effects of this utility model are as follows: When the lightning rod is not in use, both the recovery block and the lightning rod are located inside the recovery chamber. At this time, the external environment cannot affect the lightning rod located inside the recovery chamber. When the lightning rod needs to be used, the drive structure starts and drives the recovery block to move towards the support plate, thereby causing the recovery block to drive the lightning rod to move towards the support plate. When the lightning rod is completely placed outside the recovery chamber, the drive structure stops moving. At this time, the lightning rod can be used normally as a lightning rod. The lightning rod conducts the guided current through the conductive terminal to the conductive sheet, and finally the conductive sheet conducts it to the ground, achieving the lightning protection effect of the wind turbine. In addition, the lightning rod can be recovered when not in use, avoiding the external wind and rain environment from accelerating the corrosion of the lightning rod, which is conducive to improving the service life of the lightning protection components and reducing the frequency of maintenance of the lightning rod. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a partial structural cross-sectional view of the present invention;

[0019] Figure 3 for Figure 2Enlarged view of the structure at point A in the middle;

[0020] Figure 4 This is a partial structural cross-sectional view of the lightning rod in this utility model when it is located inside the recovery cavity;

[0021] Figure 5 This is a cross-sectional view of the connection between the first sliding rod and the second sliding rod in this utility model.

[0022] In the diagram: 10. Support pile; 11. Wind turbine main unit; 12. Wind turbine input shaft; 20. Support plate; 21. Recovery cylinder; 22. Recovery chamber; 23. Drive motor; 24. Drive screw; 25. Conductive sheet; 26. Sliding groove; 27. Sliding terminal block; 28. Conductive terminal; 29. ​​Recovery block; 30. Lightning rod; 31. Limiting block; 32. First sliding rod; 33. Second sliding rod; 34. Connecting ring; 35. Flexible sealing membrane; 36. Elastic cavity; 37. Return spring. Detailed Implementation

[0023] To facilitate a clear understanding of the technical means, creative features, objectives, and effects of this utility model, the following description, in conjunction with specific illustrations, further elaborates on this utility model.

[0024] like Figures 1 to 4As shown, a lightning protection assembly for a wind turbine includes a support pile 10, a wind turbine main unit 11, and a wind turbine input shaft 12. The support pile 10 is vertically fixed to the ground, the wind turbine main unit 11 is fixed to the top of the support pile 10, and the wind turbine input shaft 12 is rotatably mounted on the side of the wind turbine main unit 11 with its rotation axis extending horizontally. The assembly also includes a support plate 20, a recovery cylinder 21, a conductive sheet 25, a recovery block 29, a lightning rod 30, and a drive structure. The support plate 20 is fixed to the side of the wind turbine main unit 11 opposite to the wind turbine input shaft 12. The recovery cylinder 21 is fixed to the side of the support plate 20 facing the ground. The support plate 20 is hollow, forming a recovery cavity 22. The end of the recovery cavity 22 away from the ground sequentially passes through the recovery cylinder 21 and the support plate 20 to form a through opening. The recovery block 29 is disposed on the recovery cylinder. The recovery block 29 is made of insulating material and slides within the recovery cavity 22 along its extension direction. A lightning rod 30 is fixed to the end face of the recovery block 29 away from the ground. A drive structure is installed within the recovery cavity 22 to drive the recovery block 29 to slide. A conductive sheet 25 is fixedly connected to the recovery cylinder 21. One end of the conductive sheet 25 extends into the recovery cavity 22 and passes through the recovery block 29 along the extension direction of the recovery cavity 22. One end of the conductive sheet 25 in the recovery cavity 22 extends to the connection between the support plate 20 and the recovery cylinder 21. The other end of the conductive sheet 25 is located outside the recovery cylinder 21 and extends to the ground along the extension direction of the support pile 10. The conductive sheet 25 and the support pile 10 are connected by connectors, including but not limited to support frames and clamps. The conductive sheet is wrapped with an insulating layer depending on the actual working conditions. A conductive terminal 28, fixed to the lightning rod 30, is provided at the connection between the recovery block 29 and the lightning rod 30. One end of the conductive terminal 28 abuts against the conductive sheet 25. The drive structure includes a drive motor 23 and a drive screw 24. The drive screw 24 is rotatably mounted within the recovery chamber 22. The extension direction of the drive screw 24 is the same as the sliding direction of the recovery block 29. One end of the drive screw 24 passes through the recovery block 29 and is threadedly connected to it. The drive motor 23 is fixed to the recovery cylinder 21, and the drive motor 23 is poweredly connected to the end of the drive screw 24 furthest from the recovery block 29. After the drive motor 23 starts, it drives the drive screw 24 to rotate, thereby causing the recovery block 29 to slide within the recovery chamber 22 under the action of the threaded structure, achieving the purpose of driving the recovery block 29 to move. The drive structure can also use an electric push rod built into the recovery chamber 22 to push the recovery block 29 to move.

[0025] like Figure 3 As shown, the portion of the conductive sheet 25 located within the recovery chamber 22 has a sliding groove 26. The sliding groove 26 extends along the extension direction of the conductive sheet 25. A sliding terminal block 27 is slidably disposed within the sliding groove 26 along the extension direction of the sliding groove 26. The end of the conductive terminal 28 furthest from the lightning rod 30 is fixedly connected to the sliding terminal block 27.

[0026] like Figures 3 to 5As shown, a flexible sealing membrane 35 surrounding the through-hole is fixedly installed on the side of the support plate 20 away from the recovery cylinder 21. The end of the flexible sealing membrane 35 away from the support plate 20 has an opening for the lightning rod 30 to pass through, and the flexible sealing membrane 35 closes the through-hole. First sliding rods 32 are hinged to opposite sides of the lightning rod 30 on the support plate 20. A second sliding rod 33 is inserted into the end face of the first sliding rod 32 away from the hinge end. The second sliding rod 33 can slide along the extension direction of the first sliding rod 32. A connecting ring 34 is placed at the opening of the flexible sealing membrane 35 for the lightning rod 30 to pass through. The connecting ring 34 is fixed to the ends of the second sliding rods 33 on both sides of the lightning rod 30 away from the first sliding rod 32. The first sliding rod 32, the second sliding rod 33, and the connecting ring 34 are all made of insulating material. A limiting block 31 is fixedly installed on the lightning rod 30, and the limiting block 31 can abut against the connecting ring 34 to restrict the relative movement of the connecting ring 34 and the lightning rod 30. The path of the second sliding rod 33 sliding inside the first sliding rod 32 forms an elastic cavity 36. A return spring 37 is provided inside the elastic cavity 36. One end of the return spring 37 is fixed to the end of the second sliding rod 33 that is inserted into the first sliding rod 32, and the other end of the return spring 37 is fixed to the inner wall of the elastic cavity 36. The direction of the elastic force of the return spring 37 is the same as the sliding direction of the second sliding rod 33.

[0027] When the lightning rod 30 is not in use, both the recovery block 29 and the lightning rod 30 are located inside the recovery chamber 22. At this time, the external environment cannot affect the lightning rod 30 located inside the recovery chamber 22. When the lightning rod 30 needs to be used, the drive structure starts and drives the recovery block 29 to move towards the support plate 20, thereby causing the recovery block 29 to drive the lightning rod 30 to move towards the support plate 20. When the lightning rod 30 is completely outside the recovery chamber 22, the drive structure stops moving. At this time, the lightning rod 30 can be used normally as a lightning rod. The lightning rod conducts the guided current through the conductive terminal 28 to the conductive sheet 25, and finally the conductive sheet 25 conducts it to the ground, achieving the lightning protection effect of the wind turbine. In addition, the lightning rod 30 can be recovered when not in use, avoiding the external wind and rain environment from accelerating the corrosion of the lightning rod 30, which is conducive to improving the service life of the lightning protection components and reducing the maintenance frequency of the lightning rod 30.

[0028] During the movement of the lightning rod 30 following the recovery block 29, it is necessary to maintain the contact between the conductive terminal 28 and the conductive sheet 25 at all times. By setting the sliding terminal plate 27 and fixing the conductive terminal 28 to the sliding terminal plate 27, the sliding terminal plate 27 can always be in close contact with the conductive sheet 25, ensuring that the circuit is always unobstructed, avoiding the phenomenon of incomplete connection and disconnection, and ensuring that the lightning protection component can operate normally.

[0029] The flexible sealing membrane 35 can seal the penetration when the lightning rod 30 is located inside the recovery chamber 22, thereby preventing external wind and sand foreign objects from entering the recovery chamber 22 and preventing the recovery block 29 from being jammed by foreign objects during the sliding process, thus further ensuring that the lightning protection components can operate normally.

[0030] When the lightning rod 30 moves toward the support plate 20 and its end passes through the opening of the flexible sealing membrane 35, the connecting ring 34 is fitted onto the lightning rod 30 and slides relative to the lightning rod 30. When the connecting ring 34 abuts against the limiting block 31, the connecting ring 34 moves with the lightning rod 30. At this time, the first sliding rod 32 flips along the hinge, and the second sliding rod 33 is gradually pulled out from the elastic cavity 36. The return spring 37 is stretched. At this time, the second sliding rod 33 and the first sliding rod 32 provide horizontal support for the lightning rod 30, which helps to improve the stability of the lightning rod 30 during use. When the lightning rod 30 is retracted into the recovery cavity 22, the second sliding rod 33 retracts under the elastic action of the return spring 37. At the same time, the connecting ring 34 descends under the action of gravity and abuts against the flexible sealing membrane 35 again to complete the reset.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments, and various changes and modifications can be made without departing from the spirit and scope of this utility model. All such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A lightning protection assembly for a wind turbine generator set, comprising a support pile (10), a wind turbine generator set (11), and a wind power input shaft (12), wherein the support pile (10) is vertically fixed to the ground, the wind turbine generator set (11) is fixed to the top of the support pile (10), and the wind power input shaft (12) is rotatably disposed on the side of the wind turbine generator set (11) with the rotation axis of the wind power input shaft (12) extending in the horizontal direction, characterized in that: It also includes a support plate (20), a recovery cylinder (21), a conductive sheet (25), a recovery block (29), a lightning rod (30), and a drive structure. The support plate (20) is fixed on the side of the wind turbine (11) opposite to the wind turbine input shaft (12). The recovery cylinder (21) is fixed on the side of the support plate (20) facing the ground. The support plate (20) is hollow to form a recovery cavity (22). The end of the recovery cavity (22) away from the ground passes through the recovery cylinder (21) and the support plate (20) to form a through opening. The recovery block (29) is set in the recovery cavity (22) and slides along the extension direction of the recovery cavity (22). The lightning rod (30) is fixed on the end face of the recovery block (29) away from the ground. The drive structure is set... Inside the recovery chamber (22), a conductive sheet (25) is used to drive the recovery block (29) to slide. The conductive sheet (25) is fixedly connected to the recovery cylinder (21). One end of the conductive sheet (25) extends into the recovery chamber (22) and passes through the recovery block (29) along the extension direction of the recovery chamber (22). One end of the conductive sheet (25) located in the recovery chamber (22) extends to the connection between the support plate (20) and the recovery cylinder (21). The other end of the conductive sheet (25) is located outside the recovery cylinder (21) and extends to the ground along the extension direction of the support pile (10). A conductive terminal (28) fixed to the lightning rod (30) is provided at the connection between the recovery block (29) and the lightning rod (30). One end of the conductive terminal (28) abuts against the conductive sheet (25).

2. The lightning protection component for wind turbine generators according to claim 1, characterized in that: The drive structure includes a drive motor (23) and a drive screw (24). The drive screw (24) is rotatably disposed in the recycling chamber (22). The extension direction of the drive screw (24) is the same as the sliding direction of the recycling block (29). One end of the drive screw (24) passes through the recycling block (29) and is threadedly connected to the recycling block (29). The drive motor (23) is fixed on the recycling cylinder (21). The drive motor (23) is poweredly connected to the end of the drive screw (24) away from the recycling block (29).

3. A lightning protection component for wind turbine generators according to claim 1, characterized in that: The portion of the conductive sheet (25) located in the recovery chamber (22) has a sliding groove (26). The sliding groove (26) extends along the extension direction of the conductive sheet (25). A sliding terminal block (27) is slidably disposed in the sliding groove (26) along the extension direction of the sliding groove (26). The end of the conductive terminal (28) away from the lightning rod (30) is fixedly connected to the sliding terminal block (27).

4. A lightning protection component for wind turbine generators according to claim 1, characterized in that: A flexible sealing membrane (35) surrounding the penetration is fixedly installed on the side of the support plate (20) away from the recycling cylinder (21). The end of the flexible sealing membrane (35) away from the support plate (20) is provided with an opening for the lightning rod (30) to pass through, and the flexible sealing membrane (35) seals the penetration.

5. A lightning protection component for wind turbine generators according to claim 4, characterized in that: A first sliding rod (32) is hinged on the support plate (20) on opposite sides of the lightning rod (30). A second sliding rod (33) is inserted into the first sliding rod (32) on the end face away from the hinge end. The second sliding rod (33) can slide along the extension direction of the first sliding rod (32). A connecting ring (34) is placed at the opening on the flexible sealing membrane (35) through which the lightning rod (30) passes. The connecting ring (34) is fixed to the end of the second sliding rod (33) on both sides of the lightning rod (30) away from the first sliding rod (32). A limit block (31) is fixed on the lightning rod (30). The limit block (31) can abut against the connecting ring (34) to limit the relative movement of the connecting ring (34) and the lightning rod (30).

6. A lightning protection component for wind turbine generators according to claim 5, characterized in that: The path of the second sliding rod (33) sliding into the first sliding rod (32) forms an elastic cavity (36). A return spring (37) is provided in the elastic cavity (36). One end of the return spring (37) is fixed to the end of the second sliding rod (33) that is inserted into the first sliding rod (32), and the other end of the return spring (37) is fixed to the inner wall of the elastic cavity (36). The direction of the elastic force of the return spring (37) is the same as the sliding direction of the second sliding rod (33).

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