Wind turbine grease automatic filling system by drone

Abstract

The present invention provides a wind turbine grease automatic filling system using unmanned aerial vehicles, including an unmanned aerial vehicle automatic filling system, a cabin docking system and a fan lubrication system, wherein the unmanned aerial vehicle automatic filling system includes an unmanned aerial vehicle and an automatic filling device, wherein the cabin docking system is arranged outside the wind turbine, wherein the cabin docking system is connected to the fan lubrication system through a pipeline seal, wherein the unmanned aerial vehicle drives the automatic filling device to dock or separate with the cabin docking system, and wherein the automatic filling device fills the fan lubrication system with grease through the cabin docking system when docking with the cabin docking system. The wind turbine grease automatic filling system using unmanned aerial vehicle can realize automatic grease filling, which is safe and reliable, and saves labor costs.

Description

Technical Field

[0001] The invention relates to the field of wind turbines, and in particular to an unmanned aerial vehicle automatic filling system for lubricating grease of wind turbines. Background Art

[0002] The existing grease filling methods for wind turbines include centralized lubrication system filling and manual filling. The centralized lubrication system includes the nacelle centralized lubrication system, which is used to automatically fill grease into the main shaft bearings and yaw bearings of the wind turbine; it also includes the generator centralized lubrication system, which is used to automatically fill grease into the front and rear bearings of the generator; and it includes the hub centralized lubrication system, which is used to automatically fill grease into the three variable pitch bearings. When the wind turbine is not equipped with a centralized lubrication system, grease is added to each bearing of the wind turbine manually on a regular basis. Both refueling methods require manual regular replenishment of grease, which is inefficient and has high maintenance costs. It is a simple, mechanical, and repetitive labor. Summary of the invention

[0003] In view of the defects in the prior art, the wind turbine grease automatic filling system provided by the present invention replaces manual operation and improves the production efficiency. Specifically, it includes the following solutions:

[0004] A wind turbine grease automatic filling system using a drone, comprising a drone automatic filling system, a cabin docking system and a fan lubrication system, the drone automatic filling system comprising a drone and an automatic filling device, the cabin docking system being arranged outside the wind turbine, the cabin docking system being sealedly connected to the fan lubrication system via a pipeline, the drone driving the automatic filling device to dock or separate with the cabin docking system, and the automatic filling device filling the fan lubrication system with grease via the cabin docking system when docking with the cabin docking system.

[0005] Among them, the cabin docking system includes a box body, an insulating platform, an automatic filling device guide rail and a grease interface. The insulating platform, the automatic filling device guide rail and the grease interface are all arranged on the box body. The automatic filling device guide rail cooperates with the automatic filling device to limit the movement of the UAV automatic filling system in the box body, and enables the automatic filling device to dock with the grease interface. The insulating platform is used to achieve insulation between the box body and the automatic filling device.

[0006] Among them, the cabin docking system also includes a sliding cover, a sliding cover guide rail, a pull rod pin, a pull rod pin guide rail and a sliding cover driving system. The sliding cover is slidably connected to the box body through the sliding cover guide rail on the box body. The sliding cover driving device is used to drive the sliding of the sliding cover relative to the box body. The pull rod pin is arranged in the sliding cover pull rod pin groove. The pull rod pin guide rail is arranged on the box body and matches the position of the pull rod pin, and is used to control the up and down movement of the pull rod pin.

[0007] Among them, the automatic filling device includes an insulating guide groove, a compression rod, a support rod, a pulling handle and a grease output port, the insulating guide groove cooperates with the guide rail of the automatic filling device to limit the sliding of the automatic filling device relative to the box body, the support rod cooperates with the sliding cover to limit the sliding stability of the automatic filling device, the compression rod is used to ensure the docking pressure between the grease input port and the grease interface, the pulling handle cooperates with the pull rod pin to provide sliding power for the automatic filling device, and the grease output port cooperates with the grease interface of the cabin docking system to add grease.

[0008] Among them, the guide rail of the automatic filling device is made of conductive material or is provided with a wire to provide power for the electric grease gun of the automatic filling device. The automatic filling device is provided with a conductive circuit and a charging socket. The charging socket is connected to the guide rail of the automatic filling device through the conductive circuit, so that the drone can be charged through the charging socket.

[0009] Wherein, the wind turbine lubrication system includes a centralized lubrication system for the nacelle, a centralized lubrication system for the generator and a centralized lubrication system for the variable pitch blades.

[0010] Among them, the wind turbine lubrication system also includes a hub docking system, which includes a hub assembly fixed on the wind turbine hub, and a nacelle cover assembly and a slide plate assembly fixed on the nacelle. The hub assembly is connected to the grease interface through the cooperation of the nacelle cover assembly and the slide plate assembly to add grease to the hub.

[0011] Among them, the wheel hub assembly includes a wheel hub grease docking ring, a wheel hub grease docking tube, an annular tube and a distributor. The wheel hub grease docking ring is used to support the wheel hub assembly. There are multiple wheel hub grease docking tubes. Multiple wheel hub grease docking tubes are circumferentially distributed on the wheel hub grease docking ring, and multiple wheel hub grease docking tubes are connected through the annular tube. The distributor is connected to the other side of the annular tube relative to the wheel hub grease docking tube.

[0012] Among them, the cabin cover assembly includes a cabin side dust cover, a docking window, a skateboard rail and a drive motor. The cabin side dust cover is used to seal and protect the wheel hub assembly. The docking window is opened on the cabin side dust cover to realize the docking of the wheel hub grease docking tube and the skateboard assembly. The drive motor drives the sliding of the skateboard assembly through the skateboard rail.

[0013] Among them, the skateboard assembly includes a skateboard, a cabin side grease docking tube, a compression spring, a disc electromagnet, a sensor and a rack. The skateboard is used to cover the docking window, the cabin side grease docking tube is used to connect the grease interface, the sensor is used to sense the wheel hub grease docking tube, the rack cooperates with the skateboard rail to drive the skateboard to slide, and the compression spring and the disc electromagnet cooperate to realize the connection between the cabin side grease docking tube and one of the wheel hub grease docking tubes.

[0014] The wind turbine grease automatic filling system of the present invention is provided with the cabin docking system outside the wind turbine, so that the automatic filling system of the unmanned aerial vehicle can fill the wind turbine lubrication system with grease by docking with the cabin docking system. With the development of unmanned aerial vehicle technology, technologies such as unmanned aerial vehicle delivery, unmanned aerial vehicle plant protection, and unmanned aerial vehicle cruise are widely used, and unmanned aerial vehicle blade inspection has matured in wind power maintenance. In order to further develop the role of unmanned aerial vehicles in the field of wind power maintenance and free human labor from simple, mechanical, and repetitive labor, the present invention utilizes the functions of fast delivery and automatic cruise of unmanned aerial vehicles to develop a set of pipeline docking, automatic power supply, and automatic filling functions that are compatible with wind turbine generator sets, thereby realizing automatic and efficient grease filling of wind turbines. With the continuous development of the onshore wind power market and the rapid rise of offshore wind power, the efficient and low-cost automatic filling system of the present invention has a broader application prospect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the description of the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0016] Figure 1 This is a schematic diagram of the framework of the automatic filling system of wind turbine grease by unmanned aerial vehicle according to the present invention;

[0017] Figure 2 A schematic diagram of the connection of the automatic filling system of wind turbine grease UAV according to the present invention;

[0018] Figures 3 to 5It is a schematic diagram of the cabin docking system in the automatic filling system of the wind turbine grease UAV of the present invention;

[0019] Figure 6 and Figure 7 It is a schematic diagram of the UAV automatic filling system of the wind turbine grease UAV automatic filling system of the present invention;

[0020] Figure 8 It is a schematic diagram of the hub docking system in the automatic filling system of wind turbine grease UAV of the present invention;

[0021] Fig. 9 A schematic diagram of a hub assembly in the automatic filling system of wind turbine grease UAV of the present invention;

[0022] Fig.10 A schematic diagram of a nacelle cover assembly in the automatic filling system of wind turbine grease UAV of the present invention;

[0023] Fig.11 It is a schematic diagram of the slide plate assembly in the automatic filling system of wind turbine grease by drone of the present invention. DETAILED DESCRIPTION

[0024] The following embodiments of the technical solution of the present invention are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention.

[0025] See also Figure 1 The wind turbine grease automatic filling system 10 by drone of the present invention comprises a drone automatic filling system 100, a cabin docking system 200 and a fan lubrication system 300. The drone automatic filling system 100 comprises a drone 110 and an automatic filling device 120. The drone 110 drives the automatic filling device 120 to fly and is connected to the cabin docking system 200. The cabin docking system 200 is arranged on the outside of the wind turbine and needs to be at least partially exposed to achieve docking with the drone filling system 100. Typically, the cabin docking system 200 can be arranged on the top of the wind turbine. The cabin docking system 200 is sealed with the fan lubrication system 300 through a pipeline inside the wind turbine. When the drone 110 drives the automatic filling device 120 to dock with the cabin docking system 200 (such as Figure 2As shown), grease can be added to the fan lubrication system 300 through a sealed pipeline. It is understandable that a container for storing grease and an electric grease gun are provided in the automatic filling device 120. According to the specific grease injection location, the grease gun can also include a yaw lubrication grease gun, a hub grease gun, a generator grease gun, etc., which are not particularly limited in the present invention. Through the docking or separation of the unmanned aerial vehicle automatic filling system 100 and the cabin docking system 200, the unmanned aerial vehicle automatic filling system 100 can fly away from the wind turbine after the automatic filling device 120 fills the fan lubrication system 300 with grease through the cabin docking system 200, completing the grease filling work of the wind turbine. It is understandable that when multiple wind turbines are equipped with the cabin docking system 200 and the fan lubrication system 300 of the present invention, a single unmanned aerial vehicle automatic filling system 100 can be used to sequentially fill multiple wind turbines with grease, which greatly saves manpower and material resources, and is safe and reliable.

[0026] See also Figures 3 to 5 The cabin docking system 200 includes a box body 210, an insulating platform 220, an automatic filling device guide rail 230 and a grease interface 240. The insulating platform 220, the automatic filling device guide rail 230 and the grease interface 240 are all arranged on the box body 210. The grease interface 240 is arranged at a side wall position of the box body 210, and the automatic filling device guide rail 230 is arranged in the box body 210, which cooperates with the automatic filling device 120, so that the automatic filling system 100 of the unmanned aerial vehicle can limit its left and right movement after docking with the box body 210, and ensure that the automatic filling device 120 and the grease interface 240 are successfully docked. The insulating platform 220 is arranged between the automatic filling device guide rail 230 and the bottom of the box body 210, and the insulating platform 220 is used to achieve insulation between the box body 210 and the automatic filling device 120. A rain shield 211 may also be provided on the top of the box 210, and a drainage hole 212 may be provided below the rain shield 211. The rain shield 211 is used to prevent rainwater from penetrating into the box 210, and the drainage hole 212 drains rainwater flowing into the top of the slide cover 250 to prevent rainwater from entering the box 210. The drainage hole 212 may be provided at the position shown in the figure, and in other embodiments, may also be provided at other side walls of the box 210, or directly provided at the bottom plate of the box 210. The specific drainage structure is not particularly limited in this application.

[0027] Further, the cabin docking system 200 further includes a sliding cover 250, a sliding cover guide rail 260, a rod pin 270, a rod pin guide rail 280 and a sliding cover driving system 290. The sliding cover guide rail 260 is fixedly connected to the box body 210. The sliding cover 250 is slidably connected to the box body 210 through the sliding cover guide rail 260 on the box body 210. The sliding cover driving device 290 is used to drive the sliding of the sliding cover 250 relative to the box body 210. Specifically, the sliding cover 250 includes a push rod 253 and a pull rod 252. The pull rod 252 is further provided with a pull rod pin groove 251. The pull rod pin groove 251 is used to install the pull rod pin 270. The pull rod pin 270 is installed on the pull rod pin groove 251. At the same time, a rod pin track 280 is provided at the box body 210, and the position of the rod pin track 280 on the box body 210 matches the position of the rod pin 270, and the rod pin track 280 is provided with inclined surfaces at both ends of the track to gradually raise or lower the rod pin 270. When the slide cover 250 slides relative to the box body 210, the rod pin 270 provided on the slide cover 250 can cooperate with the rod pin track 280 to achieve the action of raising or lowering in the box body 210.

[0028] See also Figure 6 and Figure 7 The automatic filling device 120 includes an insulating guide groove 121, a compression rod 122, a support rod 123, a pull handle 124 and a grease outlet 125. The insulating guide groove 121 is used to cooperate with the guide rail 230 of the automatic filling device to limit the left and right swing of the automatic filling device 120 relative to the box body 210 during docking or separation with the cabin docking system 200. The support rod 123 cooperates with the slide cover 250 to limit the up and down movement of the automatic filling device 120 to ensure the sliding stability of the automatic filling device 120. Under the drive of the slide cover drive system 290, the slide cover push rod 252 pushes the compression rod 122 of the automatic filling device 120, thereby pushing the automatic filling device 120 to move forward, so that the compression rod 122 can ensure the docking pressure after the grease outlet 125 is docked with the grease interface 240. The pull handle 124 cooperates with the pull rod pin 270. When the automatic filling device 120 enters the box body 210, the slide cover 250 moves forward, and the pull rod pin groove 251 on the slide cover pull rod 252 pushes the pull rod pin 270 to move forward. After the pull rod pin 270 hits the pull rod pin guide rail 280, under the action of the inclined surface of the pull rod pin guide rail 280, the pull rod pin 270 overcomes its own gravity and rises, thereby inserting into the pull handle 124, preparing for pulling the automatic filling device 120 when the slide cover 250 retreats. The grease outlet 125 docks with the grease interface 240 of the cabin docking system 200, and the two cooperate to add grease.

[0029] The drones currently used in wind turbine wind farms, such as blade inspection drones, etc., have flight distance limitations and are difficult to cover the entire wind turbine wind farm, especially offshore wind turbine wind farms. For this reason, in the wind turbine grease drone automatic filling system 10 of the present invention, the drone 110 can also be charged through the cabin docking system 200 to achieve longer endurance. Specifically, the automatic filling device guide rail 230 is made of conductive material, or a wire is provided on the automatic filling device guide rail 230, and a conductive circuit 126 and a charging socket 127 are provided in the automatic filling device 120, one end of the conductive circuit 126 is connected to the insulating guide groove 121, which is conductive to the automatic filling device guide rail 230, and the other end is connected to the charging socket 127. The charging socket 127 is electrically connected to the charging interface of the drone 110, and the charging socket 127 is connected to the automatic filling device guide rail 230 through the conductive line 126, so that the drone 110 can also be charged through the charging socket 127 when docking with the cabin docking system 200, thereby extending the endurance of the drone 110. It can be understood that while the cabin docking system 200 is electrically connected to the drone 110, it can also power the grease gun (not shown in the figure) in the automatic filling device 120. At this time, when the automatic filling device 120 fills the fan lubrication system 300 with grease, it does not occupy the internal power of the drone automatic filling system 100, which is also conducive to improving the endurance of the drone automatic filling system 100 itself.

[0030] Please look back Figure 1 In one embodiment, the fan lubrication system 300 includes a cabin centralized lubrication system 310 and a generator centralized lubrication system 320. The cabin centralized lubrication system 310 is used to automatically add grease to the fan main shaft bearing and yaw bearing, and the generator centralized lubrication system 320 is used to automatically add grease to the front and rear bearings of the generator. The generator set lubrication system 320 is installed on the generator inside the cabin, and the cabin centralized lubrication system 310 is installed inside the cabin. These two systems and the cabin docking system 200 are relatively static, and only one lubrication pipe is needed to connect them.

[0031] In one embodiment, the wind turbine lubrication system 300 further includes a hub docking system 330 and a hub centralized lubrication system 340. The hub lubrication system 340 is rotatable relative to the nacelle of the wind turbine, so the hub docking system 330 needs to achieve docking between the rotating hub and the nacelle. Figure 8 The hub docking system 330 includes a hub assembly 331 fixed on the wind turbine hub, and a nacelle cover assembly 332 and a slide assembly 333 fixed on the nacelle. The hub assembly 330 is used to add grease to the hub, and the hub assembly 331 is connected to the grease interface 240 of the nacelle docking system 200 through the cooperation of the nacelle cover assembly 332 and the slide assembly 333.

[0032] See also Fig. 9 The hub assembly 331 includes a hub grease docking ring 3311, a hub grease docking pipe 3312, an annular tube 3313 and a distributor 3314. The hub grease docking ring 3311 is fixedly connected to the hub to support the hub assembly 331. There are multiple hub grease docking pipes 3312, and the multiple hub grease docking pipes 3312 are circumferentially distributed on the hub grease docking ring 3311, so that the hub assembly 331 can provide a hub grease docking pipe 3312 to communicate with the grease interface 240 at any rotation angle. The multiple hub grease docking pipes 3312 are connected through the annular tube 3313, and the distributor 3314 is connected to the other side of the annular tube 3313 relative to the hub grease docking pipe 3312. Therefore, any wheel hub grease docking tube 3312 can be connected to the distributor 3314 through the annular tube 3313, and then the wheel hub is filled with grease through the distributor 3314.

[0033] The distributor 3314 can be a progressive distributor, and the grease alternately enters from the outlet of the progressive distributor 3314. Under the pressure of the grease, the piston inside the progressive distributor moves alternately, and the grease is sent into the wheel hub lubrication system 340 through the inlet of the distributor 3314. The present invention uses the progressive distributor 3314 in reverse, and the grease alternately enters each outlet of the progressive distributor 3314 under pressure, and is sent out from the inlet of the progressive distributor 3314 and sent into the wheel hub centralized lubrication system. Adding the progressive distributor 3314 can ensure that the grease alternately enters the distributor from the left and right ends of the annular tube 3313. Because the length of the hub side grease butt pipe to the two ends of the annular tube 3313 is different, the pipeline pressure loss is different. If there is no progressive distributor 3314, the grease will flow into the wheel hub centralized lubrication system 340 from the shortest path, resulting in the accumulation of grease in the long part of the pipeline in the pipeline, which will cause the grease to dry and block the pipeline for a long time.

[0034] See also Fig.10 The cabin cover assembly 332 includes a cabin side dust cover 3321, a docking window 3322, a skateboard rail 3323 and a drive motor 3324. The cabin side dust cover 3321 covers the hub assembly 331, and is used to seal and protect the hub assembly 331 to achieve dust prevention. The docking window 3322 is provided on the cabin side dust cover 3321, and the docking window 3322 provides a hollow structure for the hub grease docking tube 3312 to dock with the skateboard assembly 333, so as to achieve docking between the hub grease docking tube 3312 and the skateboard assembly 333. The drive motor 3324 and the skateboard rail 3323 are both fixed on the cabin side dust cover 3321, and the drive motor 3324 drives the sliding of the skateboard assembly 333 through the skateboard rail 3323.

[0035] See also Fig.11 The slide plate assembly 333 includes a slide plate 3331, a cabin side grease docking tube 3332, a compression spring 3333, a disc electromagnet 3334, a sensor 3335 and a rack 3336. The slide plate 3331 is used to cover the docking window 3322 to ensure that the cabin side dust cover 3321 effectively seals and protects the hub assembly 331. One end of the cabin side grease docking tube 3332 is used to connect to the grease interface 240, and the other end needs to be connected to a hub grease docking tube 3312 through cooperation. Specifically, the other end of the cabin side grease docking tube 3332 remains in an extended state under the action of the compression spring 3333, and the rack 3336 cooperates with the slide plate rail 3323 to drive the slide plate assembly 333 to slide as a whole under the action of the drive motor 3324. The sensor 3335 synchronously senses the wheel hub grease docking tube 3312. When the sensor 3335 senses the wheel hub grease docking tube 3312, the disc electromagnet 3334 is attracted, and the cabin side grease docking tube 3332 is retracted and connected to the wheel hub grease docking tube 3312.

[0036] When the unmanned aerial vehicle automatic filling system 10 for lubricating grease of a wind turbine generator of the present invention is working, the unmanned aerial vehicle automatic filling system 100 needs to fly over the cabin docking system 200. The wind turbine is shut down and braked, the wheel hub no longer rotates, the sliding cover 250 on the top of the cabin docking system 200 is driven to slide open, and the unmanned aerial vehicle automatic filling device 120 encapsulated with various greases and filling guns lands on the automatic filling device guide rail 230 installed on the cabin docking system 200. The automatic filling device 120 achieves precise positioning in the left and right and up and down directions under the action of the automatic filling device guide rail 230 and the sliding cover 250. Preferably, the automatic filling device guide rail 230 can also conduct electricity to realize power supply to the automatic filling device 120 and charging of the unmanned aerial vehicle 110.

[0037] Then, the top sliding cover 250 moves in the closing direction, pushing the unmanned automatic filling device 120 to move forward to complete the docking of the grease outlet 125 and the grease interface 240, and stops moving after reaching a certain pressure, and the docking is completed. During this process, the pull rod pin 270 rises under the action of the pull rod pin guide rail 280, preparing for the sliding cover 250 to pull the unmanned automatic filling device 120 to move backward.

[0038] The cabin side grease docking tube 3332 leaves the hub grease docking ring 3311 under the action of the compression spring 3333, and the slide plate 3331 slides on the cabin side dust cover 3321 driven by the drive motor 3324. When the sensor 3335 detects the hub side grease docking tube 3312, the slide plate 3331 stops sliding and the disc electromagnet 3334 is attracted to complete the docking and maintain the end face sealing pressure.

[0039] When all pipelines are connected, the electric grease gun of the UAV automatic filling device 120 is started to add grease to the fan. If there is a centralized lubrication system, grease is added to the centralized lubrication system. If there is no centralized lubrication system, grease is added to each bearing through the distributor. When the grease is filled, the disc electromagnet 3334 is powered off, and the cabin side grease docking tube 3332 leaves the hub grease docking ring 3312 under the action of the compression spring 3333, the hub brake is released, and the hub rotation is not interfered with. The cabin top sliding cover 250 slides backward, and the pull rod pin 270 pulls the drone automatic filling device 120 to move backward. After moving a certain distance, the pull rod pin 270 is separated from the pull rod pin guide rail 280 below, and the upper flange of the pull rod pin 270 is still hung on the pulling handle 124 of the drone automatic filling device 120. The sliding cover 250 can still pull the drone automatic filling device 120 to the specified position, and then the sliding cover 250 moves forward, the pull rod pin 270 falls, the sliding cover 250 and the drone automatic filling device 120 are separated, and the sliding cover 250 moves backward to the specified position. The drone automatic filling device 120 takes off and leaves after the drone 110 completes charging.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. A wind turbine grease automatic filling system using drones, characterized in that: It includes an automatic filling system for unmanned aerial vehicles, a cabin docking system and a fan lubrication system. The automatic filling system for unmanned aerial vehicles includes an unmanned aerial vehicle and an automatic filling device. The cabin docking system is arranged outside the wind turbine. The cabin docking system is connected to the fan lubrication system through a pipeline seal. The unmanned aerial vehicle drives the automatic filling device to dock or separate with the cabin docking system. When docking with the cabin docking system, the automatic filling device fills the fan lubrication system with grease through the cabin docking system. The cabin docking system includes a box, an insulating platform, an automatic filling device guide rail and a grease interface. The insulating platform, the automatic filling device guide rail and the grease interface are all arranged on the box. The automatic filling device guide rail cooperates with the automatic filling device to limit the movement of the UAV automatic filling system in the box and enables the automatic filling device to dock with the grease interface. The insulating platform is used to achieve insulation between the box and the automatic filling device. The box body comprises a rainproof baffle plate, and the rainproof baffle plate is used to prevent rainwater from entering the interior of the box body.

2. The wind turbine grease automatic filling system according to claim 1 is characterized by: The cabin docking system also includes a sliding cover, a sliding cover guide rail, a pull rod pin, a pull rod pin guide rail and a sliding cover driving system. The sliding cover is slidably connected to the box body through the sliding cover guide rail on the box body. The sliding cover driving device is used to drive the sliding cover relative to the box body. The pull rod pin is arranged on the sliding cover. The pull rod pin guide rail is arranged on the box body and matches the position of the pull rod pin, and is used to control the up and down movement of the pull rod pin.

3. The automatic filling system for wind turbine grease by drone according to claim 2 is characterized in that: The automatic filling device includes an insulating guide groove, a compression rod, a support rod, a pulling handle and a grease output port. The insulating guide groove cooperates with the guide rail of the automatic filling device to limit the sliding of the automatic filling device relative to the box body, the support rod cooperates with the sliding cover to limit the sliding stability of the automatic filling device, the compression rod is used to ensure the docking pressure between the grease input port and the grease interface, the pulling handle cooperates with the pull rod pin to provide sliding power for the automatic filling device, and the grease output port cooperates with the grease interface of the cabin docking system to add grease.

4. The wind turbine generator grease automatic filling system according to claim 3 is characterized by: The guide rail of the automatic filling device is made of conductive material or is provided with a conductor to provide power for the automatic filling device. A conductive circuit and a charging socket are provided inside the automatic filling device. The charging socket is connected to the guide rail of the automatic filling device through the conductive circuit, so that the drone can be charged through the charging socket.

5. The automatic filling system for wind turbine grease by drone according to any one of claims 1 to 4, characterized in that: The fan lubrication system includes a centralized lubrication system for the nacelle and a centralized lubrication system for the generator.

6. The automatic filling system for lubricating grease of wind turbine generator by drone according to claim 5 is characterized in that: The wind turbine lubrication system also includes a hub docking system, which includes a hub assembly fixed on the wind turbine hub, and a nacelle cover assembly and a slide plate assembly fixed on the nacelle. The hub assembly is connected to the grease interface through the cooperation of the nacelle cover assembly and the slide plate assembly to add grease to the hub.

7. The automatic filling system for wind turbine grease by drone according to claim 6 is characterized by: The wheel hub assembly includes a wheel hub grease docking ring, a wheel hub grease docking tube, an annular tube and a distributor. The wheel hub grease docking ring is used to support the wheel hub assembly. There are multiple wheel hub grease docking tubes. The multiple wheel hub grease docking tubes are circumferentially distributed on the wheel hub grease docking ring, and the multiple wheel hub grease docking tubes are connected through the annular tube. The distributor is connected to the other side of the annular tube relative to the wheel hub grease docking tube.

8. The automatic filling system for lubricating grease of wind turbine generator by drone according to claim 7 is characterized in that: The cabin cover assembly includes a cabin side dust cover, a docking window, a skateboard rail and a drive motor. The cabin side dust cover is used to seal and protect the wheel hub assembly. The docking window is opened on the cabin side dust cover to achieve the docking of the wheel hub grease docking tube with the skateboard assembly. The drive motor drives the skateboard assembly to slide through the skateboard rail.

9. The automatic filling system for wind turbine grease by drone according to claim 8 is characterized in that: The skateboard assembly includes a skateboard, a cabin side grease docking tube, a compression spring, a disc electromagnet, a sensor and a rack. The skateboard is used to cover the docking window, the cabin side grease docking tube is used to connect the grease interface, the sensor is used to sense the wheel hub grease docking tube, the rack cooperates with the skateboard rail to drive the skateboard to slide, and the compression spring and the disc electromagnet cooperate to achieve the docking of the cabin side grease docking tube and one of the wheel hub grease docking tubes.

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