Lightning protection structure for wind generating set

Abstract

The invention discloses a lightning protection structure for a wind generating set, and belongs to the technical field of wind generating sets, the lightning protection structure comprises a lightning rod, the lightning rod is fixed on a supporting seat, the supporting seat is located in a main rod body, wind power blades are installed on the main rod body, and the lightning protection structure further comprises a rainfall sensor installed on the side edge of the main rod body, and the rainfall sensor is electrically connected with the servo motor and the electric telescopic rod, the output end of the servo motor is connected with a transmission lead screw, the transmission lead screw is installed in the middle of the supporting seat in a penetrating mode, and the electric telescopic rod is fixedly installed on the side edge of the upper end of the main rod body. According to the lightning protection structure for the wind generating set, the telescopic lightning protection device can be adopted, the telescopic lightning protection device extends out for lightning protection only when needed in thunderstorm weather and is stored in sunny days, the exposure time of the lightning protection device is shortened, meanwhile, impurities attached to the surface of the lightning protection device can be cleaned when the lightning protection device stretches out and draws back, and the service life of the lightning protection device is prolonged. And the phenomenon of pollution flashover caused by attachment of dust and impurities is prevented.

Description

Technical Field

[0001] The invention relates to the technical field of wind power generator sets, in particular to a lightning protection structure for wind power generator sets. Background Art

[0002] A wind turbine is a system that converts the kinetic energy of wind into electrical energy. A wind turbine includes a wind rotor and a generator. The wind rotor is composed of blades, a hub, reinforcements, etc. In order to protect the wind turbine from lightning during thunderstorms, a corresponding lightning protection device is usually installed on the top.

[0003] For example, a Chinese patent with announcement number: CN108798994A, title: A vertical axis wind power generation device, and announcement date: 2018-11-13, includes a main rod body and a plurality of wind rotor blades, wherein the plurality of wind rotor blades are arranged around the main rod body on the outside of the main rod body, the plurality of wind rotor blades are placed in a vertical direction, and one side end surface of the plurality of wind rotor blades is rotatably connected to the main rod body through a connecting mechanism.

[0004] The above-mentioned prior art has the following technical problems: in order to prevent lightning strikes, the existing wind power generation device installs a corresponding lightning arrester on the upper end of the main pole body, but the lightning arrester is directly exposed to the outside regardless of whether it is a thunderstorm or a sunny day, and lightning protection is not needed when the weather is sunny, thus increasing the exposure time of the lightning arrester when not in use. If this continues for a long time, not only will a large amount of dust easily adhere to the lightning arrester, but it will also easily reduce the service life of the lightning arrester itself.

[0005] Therefore, we propose a lightning protection structure for wind turbines to solve the above problems. Summary of the invention

[0006] The object of the present invention is to provide a lightning protection structure for a wind turbine generator set to solve the problem raised in the above background technology that in order to prevent lightning strikes, the existing wind turbine generator sets on the market install corresponding lightning protection devices on the upper end of the main pole body, but the lightning protection devices are directly exposed to the outside regardless of whether it is a thunderstorm or a sunny day, and lightning protection is not needed when the weather is sunny, thus increasing the exposure time of the lightning protection devices when not in use. If this continues for a long time, not only will a large amount of dust easily adhere to the lightning protection devices, but the service life of the lightning protection devices themselves will also be easily reduced.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a lightning protection structure for a wind turbine generator set, comprising a lightning rod, wherein the lightning rod is fixed on a support seat, and the support seat is located inside a main pole body, and a wind turbine blade is installed on the main pole body, and further comprising: a rain sensor is installed on the side of the main pole body, and the rain sensor is electrically connected to a servo motor and an electric telescopic rod, the output end of the servo motor is connected to a transmission screw, and the transmission screw is installed through the middle of the support seat, an electric telescopic rod is fixedly installed on the side of the upper end of the main pole body, and the telescopic end of the electric telescopic rod is fixedly connected to a cover plate, a pressure block is fixedly connected to the side of the support seat, and the lightning rod A movable plate is arranged on the side, and a pressure rod is fixedly connected to the bottom of the movable plate, and a cleaning pad is fixedly connected to the side of the movable plate close to the lightning rod, a connecting block is fixedly connected to the top of one end of the movable plate extending out of the main rod body, and a piston rod is installed through the inside of the connecting block, the piston rod is fixed to the side of the main rod body, the connecting block is connected to the main rod body through an auxiliary spring, the interior of the piston rod and the connecting block forms an air storage chamber, and the air storage chamber is connected to each other through an air pipe and a stabilizing component, the stabilizing component is installed at the upper end of the main rod body, for supporting and protecting the lightning rod after extending out of the main rod body, and a self-cleaning component for shaking off dust and impurities on the cleaning pad is installed in the middle of the movable plate.

[0008] Preferably, the transmission screw and the middle part of the support seat are threadedly connected, and the bottom cross-section of the support seat is set to a rectangular structure, and the support seat and the main rod body are slidably connected.

[0009] By adopting the above technical solution, the rectangular structure at the lower end of the support seat can prevent the support seat from rotating synchronously with the transmission screw.

[0010] Preferably, after the pressure block moves, the contact surface with the pressure rod at the bottom of the movable plate is set as a bevel, and the end of the pressure rod facing the pressure block is set as a sphere, and the movable plate and the main rod body are slidably connected.

[0011] By adopting the above technical solution, when the pressure block moves, the spherical end of the pressure rod can be squeezed by the bevel.

[0012] Preferably, one end of the piston rod located inside the connecting block forms a seamless sliding connection structure with the connecting block through a circumferentially fixed sealing ring, and the interior of the connecting block is configured as a hollow structure.

[0013] By adopting the above technical solution and providing a sealing ring, the sealing performance of the piston rod when it moves in the connecting block can be ensured.

[0014] Preferably, the stabilizing component includes a guide column, a guide arm and a booster spring, and the guide column is fixed to the upper side of the main rod body, the interior of the guide column is arranged as a hollow structure, and the guide arm is inserted into the middle of the guide column, the guide arm is interconnected with the interior of the guide column through the booster spring, and the internal airflow of the guide column communicates with the air flow in the air supply pipe and the air storage chamber.

[0015] By adopting the above technical solution, the assist spring can be provided to enable the guide arm to return to its original position after moving on the guide column.

[0016] Preferably, a sealing ring is circumferentially fixed to one end of the guide arm located inside the guide column, and the guide arm and the guide column are slidably connected, and one end of the guide arm away from the guide column is arranged as an arc structure.

[0017] By adopting the above technical solution, the arc-shaped end of the guiding arm is brought into contact with the extended lightning rod, so that the lightning rod can be supported and protected, thereby improving the wind resistance of the lightning rod.

[0018] Preferably, the self-cleaning component includes a linkage roller, a pull rope, a collision block and a built-in spring, and the linkage roller is installed on one end of the movable plate extending out of the main rod body through a middle rotating shaft, the middle rotating shaft of the linkage roller is connected to the collision block through a pull rope, and the collision block is connected to the inside of the movable plate through a built-in spring.

[0019] By adopting the above technical solution, the impact block can be pulled by the pull rope through the rotation of the linkage roller.

[0020] Preferably, the impact block is in contact with one end of the movable plate close to the cleaning pad in an initial state, and the impact block is slidably connected to the movable plate.

[0021] By adopting the above technical solution, the impact block can reciprocate inside the movable plate to impact the end of the movable plate close to the cleaning pad, and the dust and impurities attached to the cleaning pad can be shaken off by the vibration generated by the impact.

[0022] Preferably, the linkage roller is rotatably connected to the movable plate, and after the movable plate moves toward the outside of the main rod body, the linkage roller at the end of the movable plate can fit with the wind turbine blade on the main rod body.

[0023] By adopting the above technical solution, when the linkage roller rotates, the wind turbine blades rotate so that the wind turbine blades can drive the linkage roller to rotate synchronously.

[0024] Compared with the prior art, the invention has the following beneficial effects: the lightning protection structure for the wind turbine generator set can adopt a retractable lightning protection device, which is extended only when needed in thunderstorm weather for lightning protection, and is stored when the weather is clear, thereby reducing the exposure time of the lightning protection device. At the same time, when the lightning protection device is extended, impurities attached to the surface can be cleaned to prevent the adhesion of dust and impurities and the occurrence of dirty flash; 1. A cleaning pad is provided, and the threaded support seat can be moved in the vertical direction by rotating the transmission screw. When the outside is in thunderstorm weather, the lightning rod moves upward to extend out of the main rod body for lightning protection. When the outside is clear, the lightning rod moves downward and is stored inside the main rod body, reducing the exposure time of the lightning rod when it is not in use. At the same time, the cleaning pad fits the surface of the lightning rod, so when the lightning rod is raised or lowered, the cleaning pad can wipe off the impurities on the surface of the lightning rod, thereby realizing automatic cleaning of the lightning rod; 2. A guide arm is provided. When the support seat and the lightning rod move upward, the connecting block on the side of the support seat contacts the pressure rod at the bottom of the movable plate, thereby squeezing the pressure rod, so that the movable plate and the connecting block move in the direction close to the wind turbine blade. After the connecting block moves, the air flow inside the air storage cavity is squeezed out by the piston rod through the air pipe to the inside of the guide column. When the air flow inside the guide column increases, the guide arm can be pushed to move in the direction of the lightning rod, thereby clamping the extended lightning rod, thereby supporting and protecting the lightning rod and improving the wind resistance of the lightning rod when it is extended for use; 3. An impact block is provided. After the movable plate moves toward the direction of the wind turbine blade, the interlocking roller at the end of the movable plate can fit together with the inner surface of the wind turbine blade. Therefore, the wind turbine blade can drive the fitted interlocking roller to rotate synchronously when rotating. After the interlocking roller rotates, the impact block can be pulled toward the direction close to the interlocking roller by a pull rope. When the wind turbine blade rotates and disengages from the interlocking roller, the impact block resets and rebounds under the action of the built-in spring. The impact block moves back and forth, thereby impacting the end of the movable block close to the cleaning pad. The vibration generated by the impact can shake off impurities attached to the cleaning pad, thereby achieving self-cleaning of the cleaning pad. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the front three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the main rod body and cover plate structure of the present invention; Figure 3 It is a front cross-sectional structural schematic diagram of the present invention; Figure 4 It is a schematic diagram of the structure of the main rod body and the rain sensor of the present invention; Figure 5 For the present invention Figure 2 The enlarged structural diagram at A in the middle; Figure 6 It is a schematic diagram of the structure of the lightning rod and the movable plate of the present invention; Figure 7 For the present invention Figure 5 The enlarged structural diagram at B in the middle; Figure 8 It is a schematic diagram of the structure of the movable plate and the compression rod of the present invention; Fig. 9 It is a schematic diagram of the structure of the guide column and the guide arm of the present invention; Fig.10 It is a schematic diagram of the structure of the movable plate and the impact block of the present invention; Fig.11 It is a schematic diagram of the structure of the friction clutch and speed increaser of the present invention.

[0026] In the figure: 1. Lightning rod; 2. Support seat; 3. Main rod body; 4. Rain sensor; 5. Servo motor; 6. Transmission screw; 7. Electric telescopic rod; 8. Cover plate; 9. Pressure block; 10. Movable plate; 11. Pressure rod; 12. Cleaning pad; 13. Connecting block; 14. Piston rod; 15. Auxiliary spring; 16. Air storage chamber; 17. Air pipe; 18. Stabilizing component; 181. Guide column; 182. Guide arm; 183. Power spring; 19. Linkage roller; 191. Pull rope; 192. Impact block; 193. Built-in spring; 20. Braking system; 21. Friction clutch; 22. Speed ​​increaser; 23. Generator; 24. Tower; 25. Variable pitch system; 26. Gearbox. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0028] Example 1: Please refer to Figure 1-Figure 11In order to prevent lightning strikes, the existing wind power generation devices install corresponding lightning protection devices on the upper end of the main pole body. However, the lightning protection devices are directly exposed to the outside regardless of whether it is a thunderstorm or a sunny day, and lightning protection is not needed when the weather is sunny. Therefore, the exposure time of the lightning protection devices when not in use is increased. If this is the case for a long time, not only a large amount of dust is easily attached to the lightning protection devices, but also the service life of the lightning protection devices themselves is easily reduced. In order to solve this technical problem, the present embodiment discloses the following technical contents, including a lightning rod 1, the lightning rod 1 is fixed on a support seat 2, and the support seat 2 is located inside the main pole body 3, and the wind turbine blades are installed on the main pole body 3, and also includes: a rainfall meter is installed on the side of the main pole body 3 Sensor 4, and the rain sensor 4 is electrically connected to the servo motor 5 and the electric telescopic rod 7, the output end of the servo motor 5 is connected to the transmission screw 6, and the transmission screw 6 is installed through the middle of the support seat 2, the upper end side of the main rod body 3 is fixedly installed with the electric telescopic rod 7, and the telescopic end of the electric telescopic rod 7 is fixedly connected with the cover plate 8, the side of the lightning rod 1 is provided with a movable plate 10, and the bottom of the movable plate 10 is fixedly connected with a pressure rod 11, and the side of the movable plate 10 close to the lightning rod 1 is fixedly connected with a cleaning pad 12, the transmission screw 6 and the middle part of the support seat 2 are threadedly connected, and the bottom cross-section of the support seat 2 is set to a rectangular structure, and the support seat 2 and the main rod body 3 are slidingly connected.

[0029] The wind turbine generator is composed of an impeller, a generator 23, a tower 24, a pitch system 25, a gear box 26, an electric control system, a braking system 20, a wind direction control system, a friction clutch 21 and a speed increaser 22; Impeller: An impeller is a rotating part consisting of three or more blades that captures wind energy and converts it into mechanical energy. The size and shape of the impeller affects the performance of the generator. Generator 23: The generator converts the mechanical energy of the impeller into electrical energy output. Commonly used generators include synchronous generators and asynchronous generators. ‌Tower 24‌: The tower is a structural component that supports the impeller and generator, usually made of steel or concrete; ‌‌Variable pitch system 25‌: The variable pitch system 25 changes the pitch angle of the blades so that the blades are in the best state to absorb wind energy at different wind speeds; ‌‌‌‌Gearbox 26‌: The gearbox 26 transmits the power generated by the wind wheel under the action of wind to the generator 23, and makes it obtain a corresponding rotation speed; ‌‌Electrical control system‌: The electronic control system is used to monitor and control the operating status of the generator and manage the output and transmission of electrical energy; ‌‌Braking system 20‌: The braking system brakes the fan according to the command to stop the blades from rotating; ‌‌Wind direction control system‌: The wind direction control system is used to control the direction and rotation speed of the impeller so that the impeller always faces the wind direction and remains within the optimal speed range; Friction clutch 21: protects the generator 23, adjusts the speed, and prevents overload; Speed ​​accelerator 22: improve the power generation efficiency of wind turbines, reduce power generation costs, and improve system reliability and operability; Based on the above-mentioned specific composition of the wind turbine generator set, the coordination between the various components and the power generation principle are all in the prior art, the present application does not improve the components and internal structure of the wind turbine generator set; When the weather is clear outside, the wind turbine is driven by the wind through the impeller, driving the rotor to rotate, and the magnetic field inside the rotor and the coil inside the stator produce electromagnetic induction, thereby generating electrical energy. In thunderstorm weather, after the rain sensor 4 senses the signal, it transmits the electrical signal to the servo motor 5 and the electric telescopic rod 7. After the electric telescopic rod 7 is extended, its cover 8 is opened, and after the servo motor 5 is turned on, the transmission screw 6 can be rotated synchronously. Through the rotation of the transmission screw 6, the threaded support seat 2 can drive the lightning rod 1 to move upward, so that the lightning rod 1 extends out of the main rod body 3 for lightning protection in thunderstorm weather. In the initial state, the side of the lightning rod 1 and the cleaning pad 12 at the end of the movable plate 10 are in contact with each other, so that the impurities on the surface of the lightning rod 1 after moving upward can be wiped off by the cleaning pad 12. When the thunderstorm weather comes, the transmission screw 6 rotates in the opposite direction to move the support seat 2 and the lightning rod 1 downward so as to be re-stored into the main rod body 3, thereby reducing the exposure time of the lightning rod 1 when it is not in use.

[0030] Embodiment 2: The technical content disclosed in this embodiment is a further improvement made on the basis of the above-mentioned embodiment 1. The following technical contents are disclosed in this embodiment: a pressure block 9 is fixedly connected to the side of the support seat 2, a connecting block 13 is fixedly connected to the upper end of the movable plate 10 extending out of the main rod body 3, and a piston rod 14 is installed through the interior of the connecting block 13, the piston rod 14 is fixed to the side of the main rod body 3, the connecting block 13 is connected to the main rod body 3 through an auxiliary spring 15, the piston rod 14 and the interior of the connecting block 13 form an air storage chamber 16, and the air storage chamber 16 is connected to each other through an air pipe 17 and a stabilizing component 18, the stabilizing component 18 is installed at the upper end of the main rod body 3, and is used to support and protect the lightning rod 1 after it extends out of the main rod body 3, and a self-cleaning component for shaking off dust and impurities on the cleaning pad 12 is installed in the middle of the movable plate 10. After the pressure block 9 moves, the contact surface between the pressure rod 11 at the bottom of the movable plate 10 is set as a bevel, and the end of the pressure rod 11 facing the pressure block 9 is set as a sphere, and the movable plate 10 and the main rod body 3 are slidably connected. The end of the piston rod 14 located inside the connecting block 13 forms a seamless sliding connection structure with the connecting block 13 through a circumferentially fixed sealing ring, and the interior of the connecting block 13 is set as a hollow structure. The stabilizing component 18 includes a guide column 181, a guide arm 182 and an assisting spring 183, and the guide column 181 is fixed to the upper end side of the main rod body 3, the interior of the guide column 181 is set as a hollow structure, and the guide arm 182 is inserted into the middle of the guide column 181, and the guide arm 182 is connected to the inside of the guide column 181 through the assisting spring 183, and the internal airflow of the guide column 181 is interconnected through the air supply pipe 17 and the airflow in the air storage chamber 16. A sealing ring is fixed to one end of the guide arm 182 located inside the guide column 181, and the guide arm 182 and the guide column 181 are slidably connected, and the end of the guide arm 182 away from the guide column 181 is set to an arc structure. The self-cleaning component includes a linkage roller 19, a pull rope 191, a collision block 192 and a built-in spring 193, and the linkage roller 19 is installed at one end of the movable plate 10 extending out of the main rod body 3 through a central rotating shaft, and the central rotating shaft of the linkage roller 19 is connected to the collision block 192 through the pull rope 191, and the collision block 192 is connected to the inside of the movable plate 10 through the built-in spring 193. The collision block 192 is in contact with one end of the movable plate 10 close to the cleaning pad 12 in the initial state, and the collision block 192 is in sliding connection with the movable plate 10. The linkage roller 19 is rotatably connected to the movable plate 10, and the linkage roller 19 at the end of the movable plate 10 can be in contact with the wind turbine blades on the main rod body 3 after the movable plate 10 moves to the outside of the main rod body 3.

[0031] When the lightning rod 1 moves upward and extends out of the main rod body 3, after the lightning rod 1 and the support seat 2 move upward, the oblique side of the pressure block 9 on the side of the support seat 2 gradually squeezes the pressure rod 11 at the lower end of the movable plate 10. At this time, the squeezing of the oblique side can make the movable plate 10 move toward the outside direction of the main rod body 3. When the movable plate 10 moves, the connecting block 13 can move on the piston rod 14 fixedly connected to the side of the main rod body 3. At this time, the airflow in the air storage chamber 16 inside the connecting block 13 enters the interior of the guide column 181 through the air delivery pipe 17. After the airflow inside the guide column 181 increases, the guide arm 182 is pushed to move in the direction of the lightning rod 1. The extended lightning rod 1 can be clamped by two symmetrically distributed guide arms 182, thereby The lightning rod 1 is supported and protected to improve its wind resistance. After the movable plate 10 moves outward, the linkage roller 19 at its end can fit together with the inner surface of the wind turbine blade. When the wind turbine blade rotates, the fitting linkage roller 19 can rotate synchronously. After the linkage roller 19 rotates, the pull rope 191 can be reeled in. The reeled pull rope 191 pulls the impact block 192 to move toward the linkage roller 19. When the wind turbine blade rotates and disengages from the linkage roller 19, the impact block 192 resets and rebounds under the action of the built-in spring 193, thereby utilizing the reciprocating movement of the impact block 192 to continuously impact the end of the movable plate 10 close to the cleaning pad 12, thereby shaking off dust and impurities attached to the cleaning pad 12 through the vibration generated by the impact.

[0032] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0033] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A lightning protection structure for a wind turbine generator set, comprising a lightning rod (1), wherein the lightning rod (1) is fixed on a support seat (2), and the support seat (2) is located inside a main rod body (3), and a wind turbine blade is installed on the main rod body (3), characterized in that: Also includes: A rain sensor (4) is installed on the side of the main rod body (3), and the rain sensor (4) is electrically connected to the servo motor (5) and the electric telescopic rod (7); the output end of the servo motor (5) is connected to a transmission screw (6), and the transmission screw (6) is installed through the middle of the support seat (2); the upper end side of the main rod body (3) is fixedly installed with the electric telescopic rod (7), and the telescopic end of the electric telescopic rod (7) is fixedly connected to a cover plate (8); the side of the support seat (2) is fixedly connected to a pressure block (9); the side of the lightning rod (1) is provided with a movable plate (10), and the bottom of the movable plate (10) is fixedly connected to a pressure rod (11), and the side of the movable plate (10) close to the lightning rod (1) is fixedly connected to a cleaning pad (12); A connecting block (13) is fixedly connected to the upper end of one end of the movable plate (10) extending out of the main rod body (3), and a piston rod (14) is installed through the interior of the connecting block (13), the piston rod (14) is fixed to the side of the main rod body (3), the connecting block (13) is connected to the main rod body (3) through an auxiliary spring (15), the piston rod (14) and the interior of the connecting block (13) form an air storage chamber (16), and the air storage chamber (16) is connected to each other through an air supply pipe (17) and a stabilizing component (18), the stabilizing component (18) is installed at the upper end of the main rod body (3) and is used to support and protect the lightning rod (1) after it extends out of the main rod body (3), and a self-cleaning component for shaking off dust and impurities on the cleaning pad (12) is installed in the middle of the movable plate (10).

2. A lightning protection structure for a wind turbine generator set according to claim 1, characterized in that: The transmission screw rod (6) and the middle part of the support seat (2) are threadedly connected, the bottom cross-section of the support seat (2) is configured as a rectangular structure, and the support seat (2) and the main rod body (3) are slidably connected.

3. The lightning protection structure for a wind turbine generator set according to claim 1, characterized in that: After the pressure block (9) moves, the contact surface between the pressure rod (11) at the bottom of the movable plate (10) is set as a bevel, and the end of the pressure rod (11) facing the pressure block (9) is set as a sphere, and the movable plate (10) and the main rod body (3) are slidably connected.

4. The lightning protection structure for a wind turbine generator set according to claim 1, characterized in that: One end of the piston rod (14) located inside the connection block (13) forms a seamless sliding connection structure with the connection block (13) through a circumferentially fixed sealing ring, and the interior of the connection block (13) is configured as a hollow structure.

5. The lightning protection structure for a wind turbine generator set according to claim 1, characterized in that: The stabilizing component (18) comprises a guide column (181), a guide arm (182) and an assisting spring (183), wherein the guide column (181) is fixed to the upper side of the main rod body (3), the interior of the guide column (181) is arranged as a hollow structure, and the guide arm (182) is inserted into the middle of the guide column (181), the guide arm (182) and the interior of the guide column (181) are connected to each other through the assisting spring (183), and the internal airflow of the guide column (181) communicates with the airflow in the air supply pipe (17) and the air storage chamber (16).

6. A lightning protection structure for a wind turbine generator set according to claim 5, characterized in that: A sealing ring is circumferentially fixed to one end of the guide arm (182) located inside the guide column (181), the guide arm (182) and the guide column (181) are slidably connected, and one end of the guide arm (182) away from the guide column (181) is arranged as an arc structure.

7. The lightning protection structure for a wind turbine generator set according to claim 1, characterized in that: The self-cleaning component comprises a linkage roller (19), a pull rope (191), a collision block (192) and an internal spring (193), wherein the linkage roller (19) is mounted on one end of the movable plate (10) extending out of the main rod body (3) via a central rotation shaft, the central rotation shaft of the linkage roller (19) is connected to the collision block (192) via the pull rope (191), and the collision block (192) is connected to the inside of the movable plate (10) via the internal spring (193).

8. A lightning protection structure for a wind turbine generator set according to claim 7, characterized in that: In an initial state, the impact block (192) is in contact with one end of the movable plate (10) close to the cleaning pad (12), and the impact block (192) and the movable plate (10) are slidably connected.

9. A lightning protection structure for a wind turbine generator set according to claim 7, characterized in that: The linkage roller (19) is rotatably connected to the movable plate (10), and after the movable plate (10) moves toward the outside of the main rod body (3), the linkage roller (19) at the end of the movable plate (10) can fit with the wind turbine blades on the main rod body (3).

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