Lightning protection device of wind generating set

Abstract

The invention relates to the technical field of wind power generation, in particular to a thunder and lightning protection device of a wind generating set, which comprises a cabin, a thunder and lightning protection device and a thunder and lightning protection device, the recycling mechanism comprises a trapezoidal cavity formed in the cabin, the inner bottom of the trapezoidal cavity inclines downwards in the direction away from the wind generating set, two L-shaped grooves are formed in the inner wall of the trapezoidal cavity, the corners of the two L-shaped grooves are each in a quadrant shape, and cylinders are attached to the inner walls of the two L-shaped grooves; the ends, close to each other, of the two cylinders are jointly and fixedly connected with a rectangular rod. The lightning rod can be moved out of the trapezoidal cavity when the outside thunder occurs, the lightning rod can be collected into the trapezoidal cavity when the outside does not thunder, the two protection covers can seal the interior of the trapezoidal cavity and protect the lightning rod, and the situation that the surface of the lightning rod is corroded and adheres to sundries such as soil due to the fact that the lightning rod is exposed outside for a long time when the lightning rod is not used is avoided. And the conductive effect is influenced.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation, and in particular to a lightning protection device for a wind generator set. Background Art

[0002] A wind turbine is a device that converts wind energy into electrical energy. Since wind turbines are generally installed in a relatively open location outdoors, and are set higher to obtain a higher rotation speed.

[0003] At present, lightning rods are installed on the top of the wind turbine nacelle to protect it from lightning. Since the lightning rods are exposed to the outside for a long time, their surfaces are inevitably corroded and sticky with dirt and other debris. In addition, since the lightning rods are installed at a high position, it is inconvenient to clean them regularly, which causes the resistance on the lightning rods to gradually increase, resulting in the lightning rod's current conduction performance to deteriorate. The lightning current cannot be quickly discharged into the ground, which may cause damage to the wind turbine. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems existing in the prior art and to propose a lightning protection device for a wind turbine generator set.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A lightning protection device for a wind turbine generator set, comprising:

[0007] A nacelle, wherein a wind turbine generator set is provided on the nacelle;

[0008] The recovery mechanism includes a trapezoidal cavity provided on the nacelle, the bottom of the trapezoidal cavity is inclined downward in the direction away from the wind turbine generator set, the inner wall of the trapezoidal cavity is provided with two L-shaped grooves, the corners of the two L-shaped grooves are in a quarter-circular shape, and the inner walls of the two L-shaped grooves are fitted with cylinders, and the ends of the two cylinders close to each other are fixedly connected to a rectangular rod, the side walls of the rectangular rod are fixedly connected to a lightning rod, and a wire is connected to the lightning rod. The inner wall of the trapezoidal cavity close to the wind turbine generator set is rotatably connected to the side wall of the rectangular rod through two electric push rods, and the side walls of the two cylinders are fixedly connected to a first gear, and the inner walls of the trapezoidal cavity close to the two L-shaped grooves are fixedly connected to an arcuate tooth plate, and the first gear engages with the arcuate tooth plate during movement.

[0009] Preferably, the trapezoidal cavity is provided with a frame opening away from the inner top of the electric push rod, and the inner wall of the frame opening is rotatably connected to two protective covers via two rotating shafts, and the lower ends of the two protective covers are elastically connected to the inner wall of the trapezoidal cavity via multiple first springs.

[0010] Preferably, a lightning sensor is fixedly connected to the upper end of the engine room, and the lightning sensor is electrically connected to the two electric push rods through an external first control mechanism.

[0011] Preferably, permanent magnets are embedded in the inner walls of the two L-shaped grooves in the vertical direction, permanent magnetic blocks are embedded at the ends of the two cylinders away from each other, the side walls of the permanent magnets and the permanent magnetic blocks close to each other attract each other, a cross plate is fixedly connected to the inner wall of the trapezoidal cavity between the two electric push rods, and the lower end of the rectangular rod fits against the upper end of the cross plate during horizontal movement.

[0012] Preferably, a cleaning mechanism is provided in the trapezoidal cavity. The cleaning mechanism includes four T-shaped rods slidably connected to the inner wall of the trapezoidal cavity away from the electric push rod. The ends of the four T-shaped rods in the trapezoidal cavity are fixedly connected together with a U-shaped plate. A circular plate is rotatably connected to the side wall of the U-shaped plate away from the T-shaped rod. A semi-cylindrical barrel is fixedly connected to the side wall of the circular plate away from the T-shaped rod. A plurality of grooves are provided in the inner wall of the semi-cylindrical barrel, and a plurality of scraping blades are slidably connected in the plurality of grooves. The side walls of the scraping blades are elastically connected to the inner walls of the grooves through a plurality of second springs.

[0013] Preferably, a first rod is rotatably connected between the side wall of the circular plate away from the semi-cylindrical barrel and the side wall of the U-shaped plate. A second rod is rotatably connected below the side wall of the U-shaped plate. An incomplete gear is fixedly connected to the side wall of the second rod inside the U-shaped plate. A second gear is fixedly connected to the side wall of the first rod inside the U-shaped plate. The incomplete gear meshes with the second gear during rotation.

[0014] Preferably, a torsion spring is sleeved on the side wall of the first rod. One end of the torsion spring is fixedly connected to the inner side wall of the U-shaped plate, and the other end of the torsion spring is fixedly connected to the side wall of the second gear.

[0015] Preferably, the side wall of the U-shaped plate away from the circular plate is elastically connected to the inner wall of the trapezoidal cavity through a plurality of magnetic springs, and the lightning sensor is electrically connected to the plurality of magnetic springs through an external second control mechanism.

[0016] Preferably, a driving mechanism is provided on the trapezoidal cavity. The driving mechanism includes a third rod rotatably connected to the inner side wall of the trapezoidal cavity close to the second rod. A plurality of wind wheels are fixedly connected to the side wall of the third rod outside the trapezoidal cavity. A circular cavity is provided in the inner wall of the third rod. The side wall of the second rod penetrates through the side wall of the third rod and is located in the circular cavity. A plurality of clamping plates are fixedly connected to the inner wall of the circular cavity of the second rod. A plurality of card slots corresponding to the plurality of clamping plates one by one are provided in the inner wall of the circular cavity close to the second rod. A plurality of balls are embedded in the side walls of the plurality of clamping plates close to the second rod.

[0017] Preferably, a plurality of slag discharge ports are provided below the inner wall of the trapezoidal cavity away from the wind turbine generator, and a plurality of discharge grooves are provided in the inner wall of the semi-cylindrical barrel.

[0018] Compared with the existing technology, the advantages of the present invention are:

[0019] 1. A recovery mechanism is set up to remove the lightning rod from the trapezoidal cavity when there is thunder outside, and to put the lightning rod into the trapezoidal cavity when there is no thunder outside. In addition, the two protective covers can seal the trapezoidal cavity to protect the lightning rod, so as to prevent the lightning rod from being exposed for a long time when not in use, causing its surface to be corroded and adhered to dirt and other debris, affecting its conductive effect.

[0020] 2. A cleaning mechanism and a driving mechanism are set up, which can drive the semi-cylinder to rotate intermittently forward or reverse through the first rod and the circular plate, drive multiple scrapers to rotate, scrape impurities on the lightning rod, and the scraped impurities are discharged through multiple discharge troughs and multiple slag discharge ports.

[0021] 3. Set the permanent magnet and permanent magnet block. When the two cylinders rotate half a circle in the forward direction and are at the inner wall of the two L-shaped grooves in the vertical direction, the two permanent magnet blocks will attract the two permanent magnets respectively, thereby ensuring the stability of the position of the two cylinders and the stability of the lightning rod in the vertical direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic structural diagram of a lightning protection device for a wind turbine generator set proposed by the present invention;

[0023] Figure 2 for Figure 1 A schematic diagram of the vertical cross-section structure of the middle engine room;

[0024] Figure 3 for Figure 2 A schematic diagram of the structure at point A in the middle;

[0025] Figure 4 for Figure 1 A schematic diagram of a vertical cross-sectional structure at one of the L-shaped grooves;

[0026] Figure 5 for Figure 1 A vertical cross-sectional view of the left side of the middle recovery mechanism;

[0027] Figure 6 for Figure 5 A magnified schematic diagram of the structure at B in the middle;

[0028] Figure 7 for Figure 3 A magnified schematic diagram of the structure at C in the middle;

[0029] Figure 8 for Figure 1 A vertical cross-sectional view of the left side of the middle semi-cylinder;

[0030] Figure 9 for Figure 8 The structure at D in the middle is enlarged;

[0031] Figure 10 for Figure 3 A magnified schematic diagram of the structure at E in the middle;

[0032] Figure 11 for Figure 7 Schematic diagram of the structure after the second rod and the third rod are separated;

[0033] Figure 12 for Figure 11 A magnified schematic diagram of the structure at F in the middle;

[0034] Figure 13 for Figure 2 Schematic diagram of the structure of the recycling mechanism;

[0035] Figure 14 for Figure 2 Schematic diagram of the structure of the cleaning mechanism.

[0036] In the figure: 1. Nacelle; 2. Wind turbine; 3. Trapezoidal cavity; 4. L-shaped groove; 5. Cylinder; 6. Rectangular rod; 7. Lightning rod; 8. Wire; 9. Electric push rod; 10. First gear; 11. Arc tooth plate; 12. Protective cover; 13. First spring; 14. Lightning sensor; 15. Permanent magnet; 16. Permanent magnet block; 17. T-shaped rod; 18. U-shaped plate; 19. Circular plate; 20. Semi-cylinder; 21. Groove; 22. Scraper; 23. Second spring; 24. Magnetic spring; 25. First rod; 26. Second rod; 27. Incomplete gear; 28. Second gear; 29. ​​Torsion spring; 30. Third rod; 31. Wind wheel; 32. Circular cavity; 33. Clamping plate; 34. Clamping groove; 35. Ball; 36. Slag outlet; 37. Horizontal plate; 38. Discharge chute. DETAILED DESCRIPTION

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0038] Reference Figures 1-14 A lightning protection device for a wind turbine generator set includes a nacelle 1 on which a wind turbine generator set 2 is arranged.

[0039] The recovery mechanism includes a trapezoidal cavity 3 provided on the nacelle 1, the bottom of the trapezoidal cavity 3 is inclined downward in a direction away from the wind turbine generator set 2 (such as Figure 2 and Figure 3As shown), the inner wall of the trapezoidal cavity 3 is provided with two L-shaped grooves 4, and the corners of the two L-shaped grooves 4 are in a quarter-circular shape. The inner walls of the two L-shaped grooves 4 are fitted with cylinders 5, and the ends of the two cylinders 5 close to each other are fixedly connected to a rectangular rod 6. The side walls of the rectangular rod 6 are fixedly connected to a lightning rod 7, and the lightning rod 7 is connected to a wire 8. The inner wall of the trapezoidal cavity 3 close to the wind turbine 2 is rotatably connected to the side walls of the rectangular rod 6 through two electric push rods 9. The side walls of the two cylinders 5 are fixedly connected to a first gear 10. The inner walls of the trapezoidal cavity 3 close to the corners of the two L-shaped grooves 4 are fixedly connected to an arcuate tooth plate 11, and the first gear 10 engages with the arcuate tooth plate 11 during the movement (as shown Figure 5 shown).

[0040] A frame opening is opened at the inner top of the trapezoidal cavity 3 away from the electric push rod 9. The inner wall of the frame opening is rotatably connected to two protective covers 12 through two rotating shafts. The lower ends of the two protective covers 12 are elastically connected to the inner wall of the trapezoidal cavity 3 through multiple first springs 13.

[0041] A lightning sensor 14 is fixedly connected to the upper end of the nacelle 1 , and the lightning sensor 14 is electrically connected to the two electric push rods 9 through an external first control mechanism.

[0042] It should be noted that the lightning sensor 14 can sense whether there is thunder outside, thereby controlling the two electric push rods 9 to extend or retract through the external first control mechanism, and its control method is the existing technology.

[0043] When the lightning sensor 14 senses external lightning, the two electric push rods 9 are controlled to extend by the external first control mechanism, driving the rectangular rod 6 to move. At this time, under the limiting action of the two cylinders 5, the movement trajectory of the rectangular rod 6 is consistent with the shape of the two L-shaped grooves 4. When the rectangular rod 6 moves in the direction away from the wind turbine generator set 2, the two first gears 10 are respectively engaged with the two arc-shaped tooth plates 11. At this time, the two first gears 10 will drive the rectangular rod 6 to rotate forward through the two cylinders 5, driving the lightning rod 7 to rotate upward. When the two first gears 10 rotate and separate from the two arc-shaped tooth plates 11 respectively, the two first gears 10 will rotate forward by ninety degrees, driving the two cylinders 5, the rectangular rod 6 and the lightning rod 7 to rotate forward by ninety degrees, so that the lightning rod 7 is set vertically. At this time, the lightning rod 7 will squeeze the two protective covers 12 apart, and then the lightning rod 7 will extend through between the two protective covers 12 to protect the wind turbine generator set 2 from lightning.

[0044] When the lightning sensor 14 fails to sense external thunder, the two electric push rods 9 are controlled to contract by the external first control mechanism at this time. At this time, the rectangular rod 6 will move towards the wind turbine generator 2. After the two first gears 10 rotate and separate from the two arc-shaped tooth plates 11 respectively, the two first gears 10, the two cylinders 5, the rectangular rod 6 and the lightning rod 7 all rotate counterclockwise by 90 degrees, making the lightning rod 7 horizontally arranged. At this time, the lightning rod 7 will be located in the trapezoidal cavity 3, and the two protective covers 12 return to their initial positions under the action of multiple first springs 13, closing the trapezoidal cavity 3 and protecting the lightning rod 7, preventing the lightning rod 7 from being exposed for a long time when not in use, resulting in corrosion of its surface and adhesion of dirt and other sundries, affecting its conductive effect.

[0045] In addition, by switching the lightning rod 7 between the horizontal and vertical directions, the space on the nacelle 1 can be effectively utilized.

[0046] Permanent magnets 15 are embedded in the inner walls of the two L-shaped grooves 4 in the vertical direction, and permanent magnetic blocks 16 are embedded in the ends of the two cylinders 5 away from each other. The side walls of the permanent magnets 15 and the permanent magnetic blocks 16 close to each other attract each other. A cross plate 37 is fixedly connected to the inner wall of the trapezoidal cavity 3 between the two electric push rods 9. When the rectangular rod 6 moves horizontally, its lower end fits against the upper end of the cross plate 37, ensuring the stability of the rectangular rod 6 when it is horizontally placed.

[0047] It should be noted that both the permanent magnet 15 and the permanent magnetic block 16 are neodymium iron boron magnets. When the two cylinders 5 rotate forward by half a turn and are at the inner walls of the two L-shaped grooves 4 in the vertical direction, the two permanent magnetic blocks 16 respectively attract the two permanent magnets 15, thereby ensuring the stability of the positions of the two cylinders 5 and the stability of the lightning rod 7 in the vertical direction.

[0048] A cleaning mechanism is provided in the trapezoidal cavity 3. The cleaning mechanism includes four T-shaped rods 17 slidably connected to the inner wall of the trapezoidal cavity 3 away from the electric push rod 9. One end of the four T-shaped rods 17 located in the trapezoidal cavity 3 is fixedly connected together with a U-shaped plate 18. A circular plate 19 is rotatably connected to the side wall of the U-shaped plate 18 away from the T-shaped rod 17. A semi-cylindrical barrel 20 is fixedly connected to the side wall of the circular plate 19 away from the T-shaped rod 17. A plurality of grooves 21 are opened in the inner wall of the semi-cylindrical barrel 20. A plurality of scraping blades 22 are slidably connected in the plurality of grooves 21. The side wall of the scraping blade 22 is elastically connected to the inner wall of the groove 21 through a plurality of second springs 23.

[0049] A first rod 25 is rotatably connected between the side wall of the circular plate 19 away from the semi-cylindrical barrel 20 and the side wall of the U-shaped plate 18. A second rod 26 is rotatably connected to the lower side of the side wall of the U-shaped plate 18. An incomplete gear 27 is fixedly connected to the side wall of the second rod 26 located in the U-shaped plate 18. A second gear 28 is fixedly connected to the side wall of the first rod 25 located in the U-shaped plate 18. The incomplete gear 27 meshes with the second gear 28 during rotation. <​A torsion spring 29 is sleeved on the side wall of the first rod 25 . One end of the torsion spring 29 is fixedly connected to the inner side wall of the U-shaped plate 18 , and the other end of the torsion spring 29 is fixedly connected to the side wall of the second gear 28 .

[0051] It should be noted that when the incomplete gear 27 rotates and separates from the second gear 28 or there is no rotational force on the incomplete gear 27, the torsion spring 29 drives the circular plate 19 and the semi-cylinder 20 to rotate to the initial state (such as Figure 7 As shown), at this time, the opening on the semi-cylinder 20 faces upward, which facilitates the movement of the lightning rod 7.

[0052] The side wall of the U-shaped plate 18 away from the circular plate 19 is elastically connected to the inner wall of the trapezoidal cavity 3 through multiple magnetic springs 24 , and the lightning sensor 14 is electrically connected to the multiple magnetic springs 24 through an external second control mechanism.

[0053] It should be noted that after the magnetic spring 24 is energized, due to electromagnetic induction, the magnetic spring 24 interacts with the current in the external magnetic field to generate tensile forces of varying magnitudes to control the tensile deformation and motion state of the magnetic spring 24. When the lightning sensor 14 senses external lightning, the plurality of magnetic springs 24 are first energized through the external second control mechanism, causing the plurality of magnetic springs 24 to contract upon power, thereby driving the U-shaped plate 18 to move away from the lightning rod 7, thereby moving the side wall of the semi-cylinder 20 away from the side wall of the rectangular rod 6, thereby not affecting the movement of the rectangular rod 6 during the subsequent extension of the two electric push rods 9.

[0054] When the lightning sensor 14 does not sense external thunder, the two electric push rods 9 retract. After the two electric push rods 9 retract to their original positions, the external second control mechanism cuts off the power to the multiple magnetic springs 24. Subsequently, the multiple magnetic springs 24 are de-energized and extend, causing the U-shaped plate 18 to move toward the direction close to the lightning rod 7, so that the side wall of the semi-cylinder 20 is close to the side wall of the rectangular rod 6. At this time, the side walls of the multiple scrapers 22 are in large-area contact with the lightning rod 7.

[0055] A driving mechanism is provided on the trapezoidal cavity 3, which includes a third rod 30 rotatably connected to the inner wall of the trapezoidal cavity 3 near the second rod 26. The side wall of the third rod 30 located outside the trapezoidal cavity 3 is fixedly connected to a plurality of wind wheels 31. A circular cavity 32 is provided on the inner wall of the third rod 30. The side wall of the second rod 26 passes through the side wall of the third rod 30 and is located in the circular cavity 32. The second rod 26 is fixedly connected to a plurality of clamping plates 33 located on the inner wall of the circular cavity 32. The inner wall of the circular cavity 32 near the second rod 26 is provided with a plurality of clamping grooves 34 corresponding to the plurality of clamping plates 33 one by one. The side walls of the plurality of clamping plates 33 near the second rod 26 are all embedded with a plurality of balls 35.

[0056] The plurality of wind wheels 31 drive the third rod 30 to rotate under the action of external wind. When the plurality of magnetic springs 24 are de-energized and extended, the U-shaped plate 18 drives the second rod 26 to move, causing the plurality of clips 33 to move toward the plurality of slots 34. During this process, either the plurality of clips 33 are directly inserted into the plurality of slots 34, or the side walls of the plurality of clips 33 first fit into the inner wall of the circular cavity 32. However, under the action of the plurality of balls 35, the rotation of the plurality of third rods 30 is not hindered. Then, during the subsequent rotation of the third rod 30, the plurality of clips 33 are directly aligned with the plurality of slots 34, so that the plurality of clips 33 are inserted into the plurality of slots 34, thereby realizing the connection between the second rod 26 and the third rod 30, and providing power for the subsequent cleaning of the lightning rod 7.

[0057] When the multiple magnetic springs 24 are energized and contracted, the U-shaped plate 18 drives the second rod 26 and the multiple clamping plates 33 to move away from the multiple clamping slots 34, separating the multiple clamping plates 33 from the multiple clamping slots 34. Subsequently, the subsequent rotation of the third rod 30 will not drive the second rod 26 to rotate, so that the circular plate 19 and the semi-cylinder 20 rotate to the initial state.

[0058] A plurality of slag discharge ports 36 are provided on the lower inner wall of the trapezoidal cavity 3 away from the wind turbine generator set 2 , and a plurality of discharge troughs 38 are provided on the inner wall of the semi-cylinder 20 to facilitate the discharge of impurities cleaned from the lightning rod 7 .

[0059] In the present invention, the wind turbine generator set 2 rotates under the action of external wind force, thereby realizing its power generation function;

[0060] When the lightning rod 7 is horizontally located in the trapezoidal cavity 3 and the lightning rod 7 is located in the semi-cylinder 20 (e.g. Figure 2 and Figure 7 As shown), multiple scrapers 22 are attached to the side wall of the lightning rod 7 under the action of multiple second springs 23;

[0061] Since the multiple wind wheels 31 drive the third rod 30 to rotate under the action of external wind force, the third rod 30 drives the second rod 26 to rotate through the multiple slots 34 and the multiple clamping plates 33, driving the incomplete gear 27 to rotate and intermittently meshing with the second gear 28. When the incomplete gear 27 rotates and meshes with the second gear 28, it drives the second gear 28 to rotate forward. At this time, the torsion spring 29 rotates and stores elastic potential energy. When the incomplete gear 27 rotates and separates from the second gear 28, the elastic potential energy on the torsion spring 29 is instantly released, causing the second gear 28 to instantly rotate in the opposite direction to its original position, so that the second gear 28 can intermittently rotate forward or reverse, and the semi-cylinder 20 is driven to rotate intermittently forward or reverse through the first rod 25 and the circular plate 19, driving the multiple scrapers 22 to rotate, scraping impurities on the lightning rod 7, and the scraped impurities are discharged through the multiple discharge troughs 38 and the multiple slag discharge ports 36;

[0062] When the lightning sensor 14 senses external thunder, the plurality of magnetic springs 24 are energized through the external second control mechanism, so that the plurality of magnetic springs 24 are energized and contracted, driving the U-shaped plate 18 to move in a direction away from the lightning rod 7, so that the side wall of the semi-cylinder 20 is away from the side wall of the rectangular rod 6, which will not affect the movement of the rectangular rod 6 during the subsequent extension of the two electric push rods 9. At the same time, the U-shaped plate 18 drives the second rod 26 and the plurality of card plates 33 to move in a direction away from the plurality of card slots 34, separating the plurality of card plates 33 from the plurality of card slots 34, and then the subsequent rotation of the third rod 30 will not drive the second rod 26 to rotate, so that there is no rotational force on the incomplete gear 27. At this time, under the action of the torsion spring 29, the circular plate 19 and the semi-cylinder 20 will be driven to rotate to the initial state (such as Figure 7 As shown), at this time, the opening on the semi-cylinder 20 faces upward, which facilitates the movement of the lightning rod 7;

[0063] Then, the two electric push rods 9 are controlled to extend by the external first control mechanism, driving the rectangular rod 6 to move. At this time, under the limiting action of the two cylinders 5, the movement trajectory of the rectangular rod 6 is consistent with the shape of the two L-shaped grooves 4. When the rectangular rod 6 moves in the direction away from the wind turbine generator set 2 so that the two first gears 10 are respectively engaged with the two arc-shaped tooth plates 11, the two first gears 10 will drive the rectangular rod 6 to rotate forward through the two cylinders 5, driving the lightning rod 7 to rotate upward. When the two first gears 10 rotate and separate from the two arc-shaped tooth plates 11 respectively, the two The first gear 10 rotates forward 90 degrees, driving the two cylinders 5, the rectangular rod 6 and the lightning rod 7 to rotate forward 90 degrees, so that the lightning rod 7 is set vertically. At this time, the lightning rod 7 squeezes the two protective covers 12 apart, and then the lightning rod 7 extends through between the two protective covers 12 to provide lightning protection for the wind turbine 2. After the two cylinders 5 rotate forward half a circle, at the vertical inner walls of the two L-shaped grooves 4, the two permanent magnet blocks 16 are attracted to the two permanent magnets 15 respectively, thereby ensuring the stability of the positions of the two cylinders 5 and the stability of the lightning rod 7 in the vertical direction.

[0064] When the lightning sensor 14 does not sense external thunder, the two electric push rods 9 are controlled to retract by the external first control mechanism. At this time, the rectangular rod 6 will move in the direction close to the wind turbine generator set 2. After the two first gears 10 rotate and separate from the two arc-shaped tooth plates 11 respectively, the two first gears 10, the two cylinders 5, the rectangular rod 6 and the lightning rod 7 are all rotated ninety degrees in the opposite direction, so that the lightning rod 7 is arranged horizontally. At this time, the lightning rod 7 will be located in the trapezoidal cavity 3, and the two protective covers 12 return to the initial position under the action of the multiple first springs 13, sealing the trapezoidal cavity 3 and protecting the lightning rod 7. At this time, the lower end of the rectangular rod 6 is in contact with the upper end of the horizontal plate 37;

[0065] Then, after the two electric push rods 9 are retracted to their original position, the external second control mechanism de-energizes the multiple magnetic springs 24, and then the multiple magnetic springs 24 are de-energized and extended, causing the U-shaped plate 18 to move in the direction close to the lightning rod 7, so that the side wall of the semi-cylinder 20 is close to the side wall of the rectangular rod 6. At this time, the side walls of the multiple scrapers 22 are in large-area contact with the lightning rod 7, and the multiple card plates 33 move in the direction close to the multiple card slots 34. In this process, either the multiple card plates 33 are directly inserted into the multiple card slots 34, or the side walls of the multiple card plates 33 are first in contact with the inner wall of the circular cavity 32. However, under the action of the multiple balls 35, the rotation of the multiple third rods 30 will not be hindered. Then, during the subsequent rotation of the third rod 30, the multiple card plates 33 are directly opposite to the multiple card slots 34, so that the multiple card plates 33 are inserted into the multiple card slots 34, realizing the connection between the second rod 26 and the third rod 30, providing power for the subsequent cleaning of the lightning rod 7, so that the cleaning of the lightning rod 7 does not require the use of electrical equipment, which is green and environmentally friendly.

[0066] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A lightning protection device for a wind turbine generator set, characterized in that: Including: A nacelle (1) with a wind turbine generator (2) provided thereon. A recovery mechanism, which includes a trapezoidal cavity (3) opened on the nacelle (1). The inner bottom of the trapezoidal cavity (3) slopes downward away from the wind turbine generator (2). Two L-shaped grooves (4) are opened on the inner wall of the trapezoidal cavity (3). The corners of the two L-shaped grooves (4) are all in a quarter-circle shape. Cylinders (5) are fitted on the inner walls of the two L-shaped grooves (4). The mutually approaching ends of the two cylinders (5) are jointly fixedly connected to a rectangular rod (6). A lightning rod (7) is fixedly connected to the side wall of the rectangular rod (6). A wire (8) is connected to the lightning rod (7). The inner wall of the trapezoidal cavity (3) close to the wind turbine generator (2) is rotationally connected to the side wall of the rectangular rod (6) through two electric push rods (9). First gears (10) are fixedly connected to the side walls of the two cylinders (5). Arc-shaped tooth plates (11) are fixedly connected to the inner walls of the trapezoidal cavity (3) close to the corners of the two L-shaped grooves (4). The first gears (10) are engaged with the arc-shaped tooth plates (11) during movement.

2. The lightning protection device for a wind turbine generator set according to claim 1, characterized in that: A frame opening is provided at the inner top of the trapezoidal cavity (3) away from the electric push rods (9). Two protective covers (12) are rotationally connected to the inner wall of the frame opening through two rotating shafts. The lower ends of the two protective covers (12) are elastically connected to the inner wall of the trapezoidal cavity (3) through a plurality of first springs (13).

3. The lightning protection device for a wind turbine generator set according to claim 1, characterized in that: A lightning sensor (14) is fixedly connected to the upper end of the nacelle (1). The lightning sensor (14) is electrically connected to the two electric push rods (9) through an external first control mechanism.

4. The lightning protection device for a wind turbine generator set according to claim 1, characterized in that: Permanent magnets (15) are embedded in the vertically extending inner walls of the two L-shaped grooves (4). Permanent magnetic blocks (16) are embedded in the mutually remote ends of the two cylinders (5). The mutually approaching side walls between the permanent magnets (15) and the permanent magnetic blocks (16) attract each other. A cross plate (37) is fixedly connected to the inner wall of the trapezoidal cavity (3) between the two electric push rods (9). The lower end of the rectangular rod (6) is in contact with the upper end of the cross plate (37) during horizontal movement.

5. The lightning protection device for a wind turbine generator set according to claim 3, characterized in that: A cleaning mechanism is provided in the trapezoidal cavity (3). The cleaning mechanism includes four T-shaped rods (17) slidably connected to the inner wall of the trapezoidal cavity (3) away from the electric push rods (9). The ends of the four T-shaped rods (17) located in the trapezoidal cavity (3) are jointly fixedly connected to a U-shaped plate (18). A circular plate (k19) is rotationally connected to the side wall of the U-shaped plate (18) away from the T-shaped rods (17). A semi-cylindrical tube (20) is fixedly connected to the side wall of the circular plate (19) away from the T-shaped rods (17). A plurality of grooves (21) are opened on the inner wall of the semi-cylindrical tube (20). Scrapers (22) are slidably connected in the plurality of grooves (21). The side walls of the scrapers (22) are elastically connected to the inner walls of the grooves (21) through a plurality of second springs (23).

6. The lightning protection device for a wind turbine generator set according to claim 5, characterized in that: A first rod (25) is rotatably connected between the side wall of the circular plate (19) away from the semi-cylinder (20) and the side wall of the C-shaped plate (18); a second rod (26) is rotatably connected below the side wall of the C-shaped plate (18); the second rod (26) is fixedly connected to an incomplete gear (27) on the side wall inside the C-shaped plate (18); the first rod (25) is fixedly connected to a second gear (28) on the side wall inside the C-shaped plate (18); and the incomplete gear (27) is meshed with the second gear (28) during rotation.

7. The lightning protection device for a wind turbine generator set according to claim 6, characterized in that: A torsion spring (29) is sleeved on the side wall of the first rod (25), one end of the torsion spring (29) is fixedly connected to the inner side wall of the U-shaped plate (18), and the other end of the torsion spring (29) is fixedly connected to the side wall of the second gear (28).

8. The lightning protection device for a wind turbine generator set according to claim 5, characterized in that: The side wall of the U-shaped plate (18) away from the circular plate (19) is elastically connected to the inner wall of the trapezoidal cavity (3) through a plurality of magnetic springs (24), and the lightning sensor (14) is electrically connected to the plurality of magnetic springs (24) through an external second control mechanism.

9. The lightning protection device for a wind turbine generator set according to claim 6, characterized in that: The trapezoidal cavity (3) is provided with a driving mechanism, which includes a third rod (30) rotatably connected to the inner side wall of the trapezoidal cavity (3) near the second rod (26); the side wall of the third rod (30) located outside the trapezoidal cavity (3) is fixedly connected to a plurality of wind wheels (31); the inner wall of the third rod (30) is provided with a circular cavity (32); the side wall of the second rod (26) passes through the side wall of the third rod (30) and is located in the circular cavity (32); the second rod (26) is fixedly connected to a plurality of clamping plates (33) located on the inner wall of the circular cavity (32); the inner wall of the circular cavity (32) near the second rod (26) is provided with a plurality of clamping grooves (34) corresponding to the plurality of clamping plates (33); and the side walls of the plurality of clamping plates (33) near the second rod (26) are all embedded with a plurality of balls (35).

10. The lightning protection device for a wind turbine generator set according to claim 5, characterized in that: The trapezoidal cavity (3) is provided with a plurality of slag discharge ports (36) on the lower portion of the inner wall away from the wind turbine generator set (2), and the inner wall of the semi-cylinder (20) is provided with a plurality of discharge troughs (38).

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