Ventilation opening of cabin cover of wind driven generator

Abstract

The invention relates to the technical field of wind driven generator cabin covers, in particular to a wind driven generator cabin cover ventilation opening which comprises a cabin assembly, a ventilation energy conversion mechanism arranged in the cabin assembly and a driving mechanism arranged on the ventilation energy conversion mechanism. The grid plate cleaning mechanism is arranged in the ventilation energy conversion mechanism; the dirt storage mechanism is arranged on the ventilation energy conversion mechanism and is positioned in the cabin assembly; the ventilation energy conversion mechanism comprises a top plate and a bottom plate. The ventilation and energy conversion mechanism and the dirt storage mechanism are arranged in the straight-through air opening of the cabin cover, after the waterproof cover plate in the ventilation and energy conversion mechanism is pressed and expands outwards, a heat dissipation channel can be formed by the cabin cover and the outside, and under the action of high-altitude large airflow pressure, airflow passing through the waterproof cover plate can dissipate heat of an inner cavity of the cabin cover, so that the heat dissipation effect of the cabin cover is improved. Once outside rainfall occurs, the waterproof cover plate can be quickly closed, so that the cabin cover is ensured to be safely cooled at a high-altitude position, and meanwhile, waterproof protection is provided for an inner cavity of the cabin cover during cooling.

Description

Technical Field

[0001] The invention relates to the technical field of wind turbine nacelle covers, in particular to a ventilator for a wind turbine nacelle cover. Background Art

[0002] As an important component of a wind turbine, the nacelle is the protective structure of the wind turbine, enabling the wind turbine to operate normally in harsh meteorological environments and protecting internal equipment and personnel from external environmental factors such as wind, rain, snow, salt spray, and ultraviolet radiation.

[0003] Because the nacelle houses many electronic devices, the temperature inside the nacelle rises quickly, especially as the ambient temperature rises. To maintain a constant temperature inside the nacelle, independent air vents are required. Existing vents are built directly into the side panels of the nacelle, but this direct vent structure has several drawbacks. Since wind turbines are often installed in farmland, high-altitude dust can be a problem during periods of high winds. Once this dust clogs the direct vents, rainwater can seep into the nacelle, deteriorating the internal environment and, in severe cases, causing malfunctions in the electronic devices inside.

[0004] In view of this, a wind turbine nacelle cover vent is designed to solve the above problems. Summary of the Invention

[0005] The present invention aims to solve one of the technical problems existing in the prior art or related technologies.

[0006] To this end, the technical solution adopted in the present invention is: A wind turbine nacelle cover vent, comprising a nacelle assembly, an air exchange and energy conversion mechanism arranged in the nacelle assembly, a driving mechanism arranged on the air exchange and energy conversion mechanism, a grid cleaning mechanism arranged in the air exchange and energy conversion mechanism, and a dirt storage mechanism arranged on the air exchange and energy conversion mechanism and located in the nacelle assembly; the air exchange and energy conversion mechanism comprises a top plate and a bottom plate, a first side plate installed on one side of the top plate and the bottom plate, a second side plate installed on the other side of the top plate and the bottom plate, a plurality of built-in grid plates fixedly installed between the top plate and the second side plate, and after being fixed, a U-shaped groove is provided on the inner walls of the top plate, the first side plate and the second side plate, a waterproof cover plate and an exhaust assembly installed at the bottom of the waterproof cover plate are movably installed in the U-shaped groove; the exhaust assembly is movably installed inside the bottom plate, and is used to apply a vibration force to the waterproof cover plate by means of a high-pressure heat dissipation airflow; the waterproof cover plate is used to provide heat dissipation protection and waterproof protection for the air outlet of the high-altitude nacelle assembly.

[0007] In a preferred example, the present invention can be further configured as follows: the grid cleaning mechanism includes a loading assembly disposed on the back of the top plate, and the loading assembly is used to clean the dirt accumulated in the plurality of built-in grid plates; The loading assembly includes a fixed plate, two clamps mounted on the fixed plate, two load-bearing clamps fixedly mounted in the middle of the fixed plate, a plurality of end rods arranged between the two load-bearing clamps, a rack plate arranged inside the two clamps, and a plurality of force arms movably mounted on the rack plate and in an inclined state; The grid cleaning mechanism further comprises a truss movably mounted on the other end of the lever arm and a scraper mounted on the outer end of the truss, and the scraper is arranged in the gap between two adjacent built-in grids.

[0008] In a preferred embodiment, the present invention can be further configured as follows: the dirt storage mechanism includes a built-in cover plate installed outside the fixed plate, a ventilation plate fixedly installed on the top of the built-in cover plate, and a drawer arranged at the bottom of the inner cavity of the built-in cover plate; The dirt storage mechanism is used to store dust carried in the air flow and dirt deposited on the built-in grid plate.

[0009] In a preferred example, the present invention can be further configured as follows: the cabin assembly includes a cabin cover, two hatch cover plates arranged on both sides of the cabin cover, and a pre-installed groove opened on the inner wall of the hatch cover plate.

[0010] In a preferred embodiment, the present invention can be further configured as follows: the driving mechanism includes a micro motor mounted in a slot on the top of the top plate, a driving gear shaft mounted on a transmission shaft inside the micro motor, a battery mounted on the top of the micro motor and connected via a wiring harness, two wires connected to a connector on the top of the battery, and a photovoltaic panel connected to the two wires; The photovoltaic panel is fixedly installed on the top of the cabin cover.

[0011] In a preferred example, the present invention can be further configured as follows: the driving gear shaft is in an I-shaped structure as a whole, and a ring gear is fixedly installed in the annular groove of the driving gear shaft.

[0012] In a preferred example, the present invention can be further configured as follows: a plurality of limiting grooves are provided on the inner wall of the waterproof cover plate, and a waterproof rubber layer is provided on the outer surface of the waterproof cover plate.

[0013] In a preferred example, the present invention can be further configured as follows: the exhaust assembly includes a base fixedly mounted on the bottom end of the waterproof cover plate, and the base is movably mounted in the bottom plate, two cylindrical holes are opened inside the base, and two filter screens are installed in the cylindrical holes, a shaft movably mounted in the middle of the two filter screens, an impeller mounted in the middle of the shaft, a striker mounted on the top end of the shaft, and a bearing column fixed on the inner wall of the cylindrical hole.

[0014] In a preferred embodiment of the present invention, the grid cleaning mechanism may be further configured as follows: the grid cleaning mechanism further includes a limiting rod movably mounted in the fixed plate, an external frame mounted on the limiting rod, a spring disposed outside the limiting rod and bearing pressure on the fixed plate, two guide rods symmetrically distributed and mounted inside the fixed plate, and tension springs disposed on the two guide rods; A groove is formed on the top of the fixing plate; One end of the guide rod is fixed on the fixing plate, and the other end of the guide rod is fixed on the inner wall of the waterproof cover plate.

[0015] In a preferred embodiment, the present invention can be further configured as follows: a sliding groove is provided inside the truss; The scraper is in a trapezoidal structure as a whole, and the top and bottom ends of the scraper are provided with blades adapted to fit two adjacent built-in grid plates.

[0016] By adopting the above technical solution, the beneficial effects achieved by the present invention are as follows: 1. The present invention provides a ventilation and energy conversion mechanism and a dirt storage mechanism within the air vents directly connected to the nacelle cover. When the waterproof cover within the ventilation and energy conversion mechanism is pressurized and expands outward, a heat dissipation channel is formed between the nacelle cover and the outside world. Under the influence of the high air pressure at high altitudes, the airflow passing through the waterproof cover dissipates heat from the inner cavity of the nacelle cover. When it rains outside, the waterproof cover can be quickly closed, thereby ensuring safe heat dissipation of the nacelle cover at high altitudes and providing waterproof protection for the inner cavity of the nacelle cover during the heat dissipation period.

[0017] 2. The present invention arranges an exhaust assembly at the bottom of the drain cover. When high-altitude airflow dissipates heat to the nacelle cover, the two impellers passing through the base will be driven by the high-pressure airflow to rotate. At this time, the shaft installed inside the impeller will drive the striker to rotate regularly. Eventually, the striker will regularly impact the impact column. The generated vibration waves will radiate into the airflow passing through the gap of the grid plate, thereby preventing dust particles in the airflow from adhering to the grid plate surface, and further preventing the grid plate channel from being blocked by dust.

[0018] 3. The present invention controls the forward and reverse rotation of the micro motor through the cloud, and the transmission drive gear shaft will drive the rack plate to move up and down. As the rack plate moves back and forth, the pulled force arm will stretch the truss and the scraper to stretch regularly along the grid plate, and cooperate with the resonance of the vibration wave on the grid plate, so as to achieve self-cleaning of the grid plate surface, and the dirt after cleaning will be stored in the dirt storage mechanism, thereby preventing the environment inside the cabin cover from being polluted. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the present invention when in use; Figure 2 A schematic diagram of a part of the present invention; Figure 3For the present invention Figure 2 Schematic diagram of a partial explosion; Figure 4 This is a schematic diagram of the assembly of the air outlet of the present invention; Figure 5 Schematic diagram of the scale storage mechanism of the present invention; Figure 6 is a schematic diagram of the driving mechanism of the present invention; Figure 7 Schematic diagram of the ventilation and energy conversion mechanism of the present invention; Figure 8 Schematic diagram of explosion of the ventilation and energy conversion mechanism of the present invention; Figure 9 For the present invention Figure 8 Schematic diagram from above; Figure 10 For the present invention Figure 9 A magnified schematic diagram of point A in the middle; Figure 11 is a schematic diagram of the grid cleaning mechanism of the present invention; Figure 12 For the present invention Figure 11 Enlarged schematic diagram of point B in the middle.

[0020] Reference numerals: 100, cabin assembly; 110, cabin cover; 120, cabin cover plate; 130, pre-installed tank; 200, ventilation and energy conversion mechanism; 210, top plate; 220, first side plate; 230, second side plate; 240, bottom plate; 250, built-in grid plate; 260, waterproof cover plate; 270, limit groove; 280, exhaust assembly; 281, base; 282, impact column; 283, filter screen; 284, shaft; 285, impeller; 286, striker; 300, driving mechanism; 310, micro motor; 320, driving gear shaft; 330, battery; 340, wire; 350, photovoltaic panel; 400, grid cleaning mechanism; 410, loading assembly; 411, fixing plate; 412, clamp; 413, load-bearing splint; 414, end rod; 415, rack plate; 416, lever; 420, limit rod; 430, spring; 440, outer frame; 450, groove; 460, guide rod; 470, tension spring; 480, truss; 490, scraper; 500, scale storage mechanism; 510, built-in cover; 520, drawer; 530, ventilation plate. DETAILED DESCRIPTION

[0021] To make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be noted that the embodiments of the present invention and the features therein can be combined with each other without conflict.

[0022] It is to be understood that these descriptions are illustrative only and are not intended to limit the scope of the invention.

[0023] A wind turbine nacelle cover vent provided by some embodiments of the present invention will be described below with reference to the accompanying drawings.

[0024] Example 1: Combine Figures 1 to 12 As shown, the present invention provides a wind turbine nacelle cover vent, comprising a nacelle assembly 100, an air exchange and energy conversion mechanism 200 arranged in the nacelle assembly 100, a driving mechanism 300 arranged on the air exchange and energy conversion mechanism 200, a grid cleaning mechanism 400 arranged in the air exchange and energy conversion mechanism 200, and a dirt storage mechanism 500 arranged on the air exchange and energy conversion mechanism 200 and located in the nacelle assembly 100. The air exchange and energy conversion mechanism 200 is used to provide a heat dissipation channel for the nacelle assembly 100 and prevent rainwater from entering the nacelle assembly 100. The driving mechanism 300 is used to provide a driving force for the opening and closing of the air exchange and energy conversion mechanism 200. The grid cleaning mechanism 400 is used to clean the dirt in the air exchange and energy conversion mechanism 200. The dirt storage mechanism 500 is used to store the cleaned dirt and dust.

[0025] The cabin assembly 100 includes a cabin cover 110, two hatch cover plates 120 disposed on both sides of the cabin cover 110, and a pre-installed groove 130 formed on the inner wall of the hatch cover plates 120; The ventilation and energy conversion mechanism 200 includes a top plate 210 and a bottom plate 240, a first side plate 220 mounted on one side of the top plate 210 and the bottom plate 240, a second side plate 230 mounted on the other side of the top plate 210 and the bottom plate 240, and a plurality of built-in grid plates 250 fixedly mounted between the top plate 210 and the second side plate 230. After the top plate 210, the first side plate 220, and the second side plate 230 are fixed, a U-shaped chute is formed on the inner wall. A waterproof cover plate 260 and an exhaust assembly 280 mounted on the bottom of the waterproof cover plate 260 are movably mounted in the U-shaped chute. The exhaust assembly 280 is movably mounted inside the bottom plate 240 and is used to apply a vibration force to the waterproof cover plate 260 by means of a high-pressure heat dissipation airflow; The waterproof cover plate 260 is used to provide heat dissipation protection and waterproof protection for the air outlet of the high-altitude cabin assembly 100; The inner wall of the waterproof cover plate 260 is provided with a plurality of limiting grooves 270, and the outer surface of the waterproof cover plate 260 is provided with a waterproof rubber layer; The exhaust assembly 280 includes a base 281 fixedly mounted at the bottom end of the waterproof cover 260 and movably mounted within the bottom plate 240. The base 281 has two cylindrical holes formed therein, with two filter screens 283 mounted in the cylindrical holes. A shaft 284 movably mounted between the two filter screens 283 is provided. An impeller 285 is mounted in the middle of the shaft 284. A striker 286 is mounted at the top of the shaft 284. A support column 282 is fixed to the inner wall of the cylindrical hole. The dirt storage mechanism 500 includes a built-in cover plate 510, a ventilation plate 530 fixedly mounted on the top of the built-in cover plate 510, and a drawer 520 disposed at the bottom of the inner cavity of the built-in cover plate 510; The dirt storage mechanism 500 is used to store dust carried in the air flow and dirt deposited on the built-in grid plate 250 .

[0026] When the waterproof cover plate 260 is pressurized and expands outward, a ventilation cavity is formed between the waterproof cover plate 260 and the multiple built-in grid plates 250. The hot air in the inner cavity of the cabin cover 110 enters along the ventilation plate 530, and then the hot air flows from the inner cavity of the built-in cover plate 510 into the gaps in the multiple built-in grid plates 250. Finally, the hot air flows through the gaps in the multiple built-in grid plates 250 from the inner cavity of the waterproof cover plate 260 into the exhaust assembly 280. At this time, the channel formed by the waterproof cover plate 260 and the multiple built-in grid plates 250 can timely dissipate heat from the inner cavity of the cabin cover 110. The heat dissipation is accompanied by the circulation of airflow. As the airflow passes through the exhaust assembly 280, dust particles in the external airflow are filtered. When encountering rainy weather or the outside air flow is humid, the pulled waterproof cover 260 will quickly close in the U-shaped slide groove, and the air outlet can be quickly closed at this time. The closed air outlet can prevent the outside rainwater from entering the inner cavity of the cabin cover 110, and at the same time prevent the accumulated dirt from introducing rainwater into the cabin cover 110.

[0027] Example 2: Combine Figures 2 to 6 As shown, based on Example 1, the drive mechanism 300 includes a micro motor 310 installed in a notch on the top of the top plate 210, a drive gear shaft 320 installed on the transmission shaft inside the micro motor 310, a battery 330 installed on the top of the micro motor 310 and connected via a wiring harness, two wires 340 connected to the top connector of the battery 330, and a photovoltaic panel 350 connected to the two wires 340; The photovoltaic panel 350 is fixedly mounted on the top of the cabin cover 110; The driving gear shaft 320 is in an I-shaped structure as a whole, and a ring gear is fixedly installed in the annular groove of the driving gear shaft 320 .

[0028] Preferably, the upper half of the micromotor 310 is exposed in the inner cavity of the pre-installed groove 130. As the micromotor 310 runs, the heated micromotor 310 is quickly cooled in the pre-installed groove 130, thereby ensuring that the micromotor 310 does not suffer from coil burnout due to heat dissipation difficulties after long-term operation. Among them, one side of the battery 330 is connected to the inner cavity of the cabin cover 110 through the pre-installed slot 130. When the battery 330 is continuously charged and discharged, the heated battery 330 can dissipate heat simultaneously with the inner cavity of the cabin cover 110 to increase the service life of the battery 330.

[0029] Example 3: Combine Figures 8 to 12 As shown, based on Example 1, the grid cleaning mechanism 400 includes a loading assembly 410 disposed on the back of the top plate 210, and the loading assembly 410 is used to clean the dirt in the multiple built-in grid plates 250; The loading assembly 410 includes a fixed plate 411, two clamps 412 mounted on the fixed plate 411, two load-bearing clamps 413 fixedly mounted in the middle of the fixed plate 411, a plurality of end rods 414 disposed between the two load-bearing clamps 413, a rack plate 415 disposed within the two clamps 412, and a plurality of lever arms 416 movably mounted on the rack plate 415 and in an inclined state. The grid cleaning mechanism 400 further includes a truss 480 movably mounted on the other end of the lever arm 416 and a scraper 490 mounted on the outer end of the truss 480 , and the scraper 490 is disposed in the gap between two adjacent built-in grids 250 ; A slide groove is provided inside the truss 480; The scraper 490 is in a trapezoidal structure as a whole, and the top and bottom ends of the scraper 490 are provided with cutting edges adapted to fit two adjacent built-in grid plates 250 .

[0030] Specifically, the end rod 414 is movably installed in the slide groove inside the truss 480. When the micro motor 310 is started, the rack plate 415 is driven by the driving gear shaft 320, and the rack plate 415 that is recursively lifted and lowered will apply traction to the multiple force arms 416. At the same time, the multiple force arms 416 after being pulled will also push the multiple evenly distributed trusses 480 to slide back and forth. At this time, the scraper 490 fixed on the truss 480 can remove the dirt on the surface of the two adjacent built-in grid plates 250. The dirt after removal will be vibrated and quickly stored in the inside of the drawer 520 along with the suction of the air flow to prevent the internal environment of the cabin cover 110 from being polluted by dust.

[0031] The grid cleaning mechanism 400 further includes a limiting rod 420 movably mounted within the fixed plate 411, an external frame 440 mounted on the limiting rod 420, a spring 430 disposed outside the limiting rod 420 and bearing pressure on the fixed plate 411, two guide rods 460 symmetrically mounted within the fixed plate 411, and tension springs 470 disposed on the two guide rods 460. A groove 450 is formed at the top of the fixing plate 411; One end of the guide rod 460 is fixed to the fixing plate 411 , and the other end of the guide rod 460 is fixed to the inner wall of the waterproof cover plate 260 .

[0032] Preferably, the limit rod 420 is used to provide stabilizing support for the extension of the outer frame 440. When the rack plate 415 is raised or lowered, the evenly distributed multiple force arms 416 exert pressure on the multiple trusses 480, and also pull the outer frame 440. The outer frame 440 cooperates with the multiple built-in grid plates 250 to provide a stable support platform for the scraper 490 that extends back and forth. At the same time, the multiple scrapers 490 extruded outward will also improve the stability of the waterproof cover 260 after outward expansion. The efficiency of heat dissipation in the inner cavity of the cabin cover 110 is achieved by controlling the outward expansion amplitude of the waterproof cover 260. At the same time, the heat dissipation method with the port facing downward can effectively prevent rainwater from entering.

[0033] The working principle and usage process of the present invention are as follows: After the wind turbine is installed on the ground in a designated area, the top of the photovoltaic panel 350 faces upward, converting light energy into electrical energy and storing it in the battery 330. By installing a temperature control detection device in the inner cavity of the cabin cover 110, when the temperature in the inner cavity of the cabin cover 110 rises and ventilation and heat dissipation are required, the micro motor 310 is controlled by the cloud to operate. At this time, the transmission shaft in the micro motor 310 cooperates with the drive gear shaft 320 to reverse until the driven rack plate 415 descends; As the rack plate 415 descends, the multiple force arms 416 movably mounted on the rack plate 415 will be compressed and drive the multiple trusses 480 to extend outward, and finally the multiple trusses 480 evenly distributed will push the multiple scrapers 490 to extend outward, and the multiple scrapers 490 will push the waterproof cover plate 260 outward as a whole until a heat dissipation gap is formed between the top plate 210 and the bottom plate 240. At the moment when the waterproof cover plate 260 expands outward, the exhaust assembly 280 mounted at the bottom end of the waterproof cover plate 260 will be pulled out from the bottom plate 240 as a whole. At this time, the height of the inner cavity of the cabin cover 110 is reduced. The warm air will flow along the ventilation plate 530 into the inner cavity of the built-in cover plate 510. Finally, the high-temperature airflow in the inner cavity of the built-in cover plate 510 will be transferred from the gaps of the multiple built-in grid plates 250 to the cavity of the waterproof cover plate 260. Then, the hot airflow in the inner cavity of the waterproof cover plate 260 can be released outward from the two cylindrical cavities inside the base 281. During the release of the hot airflow, the two impellers 285 set in the two cylindrical cavities cooperate with the two shafts 284 to drive the two strikers 286 to rotate regularly. Finally, the two strikers 286 can regularly strike the two impact columns 282. The vibration force generated by the exhaust assembly 280 as a whole is radiated to the waterproof cover 260, which ultimately applies a vibration force to the multiple internal grilles 250. The airflow passing through the gaps between the multiple internal grilles 250 is also affected by the vibration radiation. At this time, dust particles in the airflow affected by the vibration wave can be prevented from being adsorbed on the surface of the internal grilles 250. When the outside temperature drops suddenly or the temperature inside the cabin cover 110 drops due to rainfall, the cloud-controlled micromotor 310 will rotate forward, and the drive gear shaft 320 will drive the rack plate 415 to lift upward. Eventually, the waterproof cover 260 will be pressed by the outer frame 440 and quickly closed. At this time, the air outlet of the cabin cover 110 can be sealed by the waterproof cover 260, thereby preventing rainwater from entering the cabin cover 110. As the waterproof cover 260 opens and closes, the multiple scrapers 490 arranged between the multiple built-in grids 250 are pulled and stretched back and forth. Combined with the radiation of vibration waves, the multiple scrapers 490 can effectively scrape both sides of the multiple built-in grids 250. As the temperature of the cabin cover 110 and the outside world changes, when the outside cold air flow enters the waterproof cover 260 along the base 281 and passes through the gaps of the multiple built-in grids 250, the scraped dirt will be transferred to the inner cavity of the built-in cover 510, and finally the dirt will be stored inside the drawer 520, thereby ensuring that the inner cavity of the cabin cover 110 remains clean during the heat dissipation period.

[0034] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A wind turbine nacelle cover vent, comprising a nacelle assembly (100), characterized in that: It also includes a ventilation and energy conversion mechanism (200) disposed in the cabin assembly (100), a driving mechanism (300) disposed on the ventilation and energy conversion mechanism (200), a grid cleaning mechanism (400) disposed in the ventilation and energy conversion mechanism (200), and a dirt storage mechanism (500) disposed on the ventilation and energy conversion mechanism (200) and located in the cabin assembly (100); The ventilation and energy conversion mechanism (200) comprises a top plate (210), a bottom plate (240), a first side plate (220) installed on one side of the top plate (210) and the bottom plate (240), a second side plate (230) installed on the other side of the top plate (210) and the bottom plate (240), a plurality of built-in grid plates (250) fixedly installed between the top plate (210) and the second side plate (230), and after the top plate (210), the first side plate (220) and the second side plate (230) are fixed, a U-shaped chute is provided on the inner walls thereof, a waterproof cover plate (260) and an exhaust assembly (280) installed at the bottom of the waterproof cover plate (260) are movably installed in the U-shaped chute; The exhaust assembly (280) is movably mounted inside the base plate (240) and is used to apply a vibration force to the waterproof cover plate (260) by means of a high-pressure heat dissipation airflow; The waterproof cover plate (260) is used to provide heat dissipation protection and waterproof protection for the air outlet of the high-altitude cabin component (100).

2. The wind turbine nacelle cover vent according to claim 1, characterized in that: The grid cleaning mechanism (400) comprises a loading assembly (410) arranged on the back of the top plate (210), and the loading assembly (410) is used to clean dirt accumulated in the plurality of built-in grid plates (250); The loading assembly (410) includes a fixed plate (411), two clamps (412) mounted on the fixed plate (411), two load-bearing clamps (413) fixedly mounted in the middle of the fixed plate (411), a plurality of end rods (414) disposed between the two load-bearing clamps (413), a rack plate (415) disposed inside the two clamps (412), and a plurality of force arms (416) movably mounted on the rack plate (415) and in an inclined state; The grid cleaning mechanism (400) further comprises a truss (480) movably mounted on the other end of the lever arm (416) and a scraper (490) mounted on the outer end of the truss (480), wherein the scraper (490) is arranged in the gap between two adjacent built-in grids (250).

3. The wind turbine nacelle cover vent according to claim 1, characterized in that: The dirt storage mechanism (500) comprises a built-in cover plate (510) mounted on the outside of the fixed plate (411), a ventilation plate (530) fixedly mounted on the top of the built-in cover plate (510), and a drawer (520) arranged at the bottom of the inner cavity of the built-in cover plate (510); The dirt storage mechanism (500) is used to store dust entrained in the airflow and dirt deposited on the built-in grid plate (250).

4. The wind turbine nacelle cover vent according to claim 1, characterized in that: The cabin assembly (100) comprises a cabin cover (110), two cabin cover plates (120) arranged on both sides of the cabin cover (110), and a pre-installed groove (130) opened on the inner wall of the cabin cover plate (120).

5. The wind turbine nacelle cover vent according to claim 1, characterized in that: The driving mechanism (300) includes a micro motor (310) mounted in a top notch of the top plate (210), a driving gear shaft (320) mounted on a transmission shaft inside the micro motor (310), a battery (330) mounted on the top of the micro motor (310) and connected via a wiring harness, two wires (340) connected to a top connector of the battery (330), and a photovoltaic panel (350) connected to the two wires (340); The photovoltaic panel (350) is fixedly mounted on the top of the cabin cover (110).

6. The wind turbine nacelle cover vent according to claim 5, characterized in that: The driving gear shaft (320) is in an I-shaped structure as a whole, and a ring gear is fixedly installed in the ring groove of the driving gear shaft (320).

7. The wind turbine nacelle cover vent according to claim 1, characterized in that: The inner wall of the waterproof cover plate (260) is provided with a plurality of limiting grooves (270), and the outer surface of the waterproof cover plate (260) is provided with a waterproof rubber layer.

8. The wind turbine nacelle cover vent according to claim 1, characterized in that: The exhaust assembly (280) includes a base (281) fixedly mounted on the bottom end of the waterproof cover (260), and the base (281) is movably mounted in the bottom plate (240), two cylindrical holes are opened inside the base (281), and two filter screens (283) are installed in the cylindrical holes, a shaft (284) movably mounted in the middle of the two filter screens (283), an impeller (285) mounted in the middle of the shaft (284), a striker (286) mounted on the top end of the shaft (284), and a bearing column (282) fixed on the inner wall of the cylindrical hole.

9. The wind turbine nacelle cover vent according to claim 2, characterized in that: The grid cleaning mechanism (400) further comprises a limiting rod (420) movably mounted in the fixed plate (411), an external frame (440) mounted on the limiting rod (420), a spring (430) disposed outside the limiting rod (420) and bearing pressure on the fixed plate (411), two guide rods (460) mounted inside the fixed plate (411) and symmetrically distributed, and a tension spring (470) disposed on the two guide rods (460); A groove (450) is formed at the top of the fixing plate (411); One end of the guide rod (460) is fixed on the fixing plate (411), and the other end of the guide rod (460) is fixed on the inner wall of the waterproof cover plate (260).

10. The wind turbine nacelle cover vent according to claim 2, characterized in that: A sliding groove is provided inside the truss (480); The scraper (490) has a trapezoidal structure as a whole, and the top and bottom ends of the scraper (490) are provided with blades adapted to fit two adjacent built-in grid plates (250).

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