Internal motor cooling system for a wind turbine generator system

Abstract

The application discloses an internal motor heat dissipation system of a wind power generator unit, which comprises a nacelle cover, a tower body rotatably connected to the bottom of the nacelle cover, a gear box, a brake and a generator arranged in sequence in the nacelle cover, a plurality of driving motors arranged on the bottom of the inner wall of the nacelle cover, and a plurality of air-permeable cooling components penetrating through the side wall of the nacelle cover; a drainage cooling device is arranged on the top of the nacelle cover, the drainage cooling device comprises a drainage box and air flow cooling components arranged outside the generator; a water collecting device is arranged on the top of the inner wall of the nacelle cover, the water collecting device comprises a water storage tank, a rainwater collecting component arranged on the top of the drainage box and a cooling water collecting component arranged in the drainage box; a heat exchange water cooling component is arranged on the bottom of the nacelle cover, a plurality of heat conducting components are arranged on the side wall of the generator, a water body cooling component is arranged on the outer wall of the driving motor, and a transmission component is arranged on the side wall of the water storage tank. The application is a heat dissipation system which is convenient for wind energy heat dissipation, water resource collection and efficient water cooling heat dissipation.

Description

TECHNICAL FIELD

[0001] The present application mainly relates to the technical field of wind power generation, in particular to an internal motor heat dissipation system of a wind turbine generator system. BACKGROUND

[0002] Wind power generation refers to converting the kinetic energy of wind into electric energy, and wind energy is a clean and renewable energy source.

[0003] According to the wind turbine internal wall heat dissipation device provided in the patent document with the application number CN201810683291.7, the product is provided with a whole structure composed of an exhaust duct, a filter screen, a cover and an upper fixing ring, a vertical air guide plate, a horizontal air guide plate and a lower fixing ring, which can facilitate the exhaust of high-temperature air from the upper part of the wind turbine tower, prevent foreign matters or rainwater from entering, and enable the high-temperature air in the wind turbine tower to flow to the exhaust duct through the air guide opening and be exhausted, thereby achieving the heat dissipation effect. In addition, the product also plays a role in replacing the air in the drain pipe and the shunt pipe, and the upward flowing air can also take away part of the heat inside the wind turbine tower, thereby enhancing the heat dissipation effect. The product can directly exhaust the high-temperature air from the upper part of the wind turbine tower, take away the heat inside the tower, has high heat dissipation efficiency, simple structure, and convenient maintenance and disassembly.

[0004] The product in the above patent can directly exhaust the high-temperature air from the upper part of the wind turbine tower, and has high heat dissipation efficiency, but it is not convenient to utilize wind energy for heat dissipation, and it is not convenient to collect water resources and efficiently water-cool and dissipate heat. SUMMARY

[0005] The present application mainly provides an internal motor heat dissipation system of a wind turbine generator system to solve the technical problems raised in the background art.

[0006] The technical solution adopted by the present application to solve the above technical problems is as follows:

[0007] An internal motor heat dissipation system of a wind turbine generator system, comprising a nacelle cover, the bottom of the nacelle cover being rotationally connected to a tower body, one end of the nacelle cover being provided with a fan blade, the inner wall bottom of the nacelle cover being provided with a gear box, a brake and a generator connected in sequence, the gear box being connected to the fan blade through a rotating shaft, the side wall of the tower body being provided with a toothed wall ring, the inner wall bottom of the nacelle cover being provided with a plurality of drive motors, the drive motor execution end being provided with a drive gear meshing with the toothed wall ring, and the side wall of the nacelle cover being provided with a plurality of air permeable cooling components.

[0008] The top of the cabin cover is provided with a drainage cooling device, the drainage cooling device comprises a drainage box arranged on the top of the cabin cover, an opening and closing component arranged on one end of the drainage box close to the fan, and an air flow heat dissipation component arranged on the outside of the generator and having an air inlet end communicated with the other end of the drainage box;

[0009] The top of the inner wall of the cabin cover is provided with a water collecting device, the water collecting device comprises a water storage tank arranged on the top of the inner wall of the cabin cover, a rainwater collecting component arranged on the top of the drainage box and communicated with the water storage tank through a pipeline, and a cooling water collecting component arranged in the drainage box and communicated with the water storage tank through a pipeline;

[0010] The bottom of the cabin cover is provided with a heat exchange water cooling component, the sidewall of the generator is provided with a plurality of liquid discharge ends communicated with the heat exchange water cooling component through a pipeline, the outer wall of the driving motor is sleeved with a water body cooling component communicated with the heat exchange water cooling component through a pipeline, the sidewall of the water storage tank is provided with a transmission component for transmitting water to the heat exchange water cooling component and the water body cooling component, and the heat exchange water cooling component is communicated with the water storage tank through a pipeline.

[0011] Preferably, the air permeable cooling component comprises an air permeable box communicated with the cabin cover through the sidewall, a filter screen arranged on one end of the air permeable box close to the fan, and an air permeable hole penetrating the cabin cover away from the fan. In this preferred embodiment, the air permeable cooling component facilitates air permeation in the cabin cover, so as to facilitate heat dissipation in the cabin cover.

[0012] Preferably, the opening and closing component comprises an L-shaped opening and closing plate penetrating the top of the drainage box and extending into the drainage box at one end, and a plurality of electric cylinders arranged on the top of the L-shaped opening and closing plate and having an execution end penetrating the L-shaped opening and closing plate and connecting the top of the drainage box. In this preferred embodiment, the opening and closing component realizes opening or closing of the drainage box.

[0013] Preferably, the air flow heat dissipation component comprises an air flow heat dissipation box arranged on the bottom of the inner wall of the cabin cover and sleeved on the outside of the generator, a flow guide box communicated with the outer wall of the air flow heat dissipation box at one end and communicated with the end of the drainage box at the other end, and a plurality of exhaust holes communicated with the cabin cover at one end and communicated with the air flow heat dissipation box at the other end. In this preferred embodiment, the air flow heat dissipation component facilitates air flow heat dissipation of the generator.

[0014] Preferably, the rainwater collecting component comprises a rainwater collecting box arranged on the top of the drainage box, a screen arranged on the inner wall of the rainwater collecting box in an inclined manner, and a sewage outlet penetrating the sidewall of the rainwater collecting box and located at the lowest position of the screen, the sidewall of the rainwater collecting box is provided with a first electromagnetic valve, and the first electromagnetic valve is communicated with the water storage tank through a pipeline. In this preferred embodiment, the rainwater collecting component facilitates rainwater collection.

[0015] Preferably, the cooling and water collecting component comprises a base block and a steam-water separator arranged in the drainage box in sequence, the side wall of the base block is provided with a plurality of funnel holes, the side wall of each funnel hole is embedded with a semiconductor refrigeration sheet, the steam-water separator is connected with the water storage tank through a pipeline at the water outlet end, and the steam-water separator is connected with the flow guide box at the air outlet end.

[0016] Preferably, the heat exchange water cooling component comprises a heat dissipation water tank arranged at the bottom of the cabin cover and a booster pump arranged at the bottom of the heat dissipation water tank and connected with the heat dissipation water tank at the execution end, and the heat dissipation water tank is connected with the water storage tank through a pipeline.

[0017] Preferably, the heat dissipation component comprises a hollow pipe arranged at the side wall of the generator, a plurality of heat conducting sheets arranged at the inner wall of the hollow pipe and extending into the generator at one end, and a second electromagnetic valve arranged at the side wall of the heat dissipation water tank and connected with the hollow pipe at the liquid outlet end.

[0018] Preferably, the transmission component comprises a third electromagnetic valve arranged at the side wall of the water storage tank and a transmission pipe connected with the third electromagnetic valve at one end and connected with a plurality of hollow pipes at the other end.

[0019] Preferably, the water body cooling component comprises a cooling cover pipe arranged at the inner bottom wall of the cabin cover and covering the driving motor, a sandwich layer arranged in the cooling cover pipe, the top of the sandwich layer being connected with the transmission pipe through a pipeline, and a fourth electromagnetic valve arranged at the side wall of the heat dissipation water tank and connected with the bottom of the side wall of the sandwich layer through a pipeline.

[0020] Compared with the prior art, the present application has the following beneficial effects:

[0021] The heat dissipation system in the present application can utilize wind energy for heat dissipation, collect water resources and efficiently cool water.

[0022] The air is ventilated through the air-ventilation cooling component, so that the heat in the cabin cover is discharged, the drainage box is opened or closed through the opening and closing component, the generator is cooled through the air-flow cooling component, the rain is collected through the rainwater collecting component, the water in the air is collected through the cooling water collecting component, the heat of the generator is discharged through the heat discharging component, so that the heat is discharged, the water is introduced into the heat discharging component and the water body cooling component through the transmission component, the driving motor is cooled through the water body cooling component, and the water after absorbing heat is collected and cooled through the heat exchange water cooling component, so that the water resource is recycled.

[0023] The application will be explained in detail below in combination with the drawings and specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is an overall structure isometric view of the application;

[0025] Figure 2 It is an overall structure explosion view of the application;

[0026] Figure 3 It is a drainage cooling device structure explosion view of the application;

[0027] Figure 4 It is a heat exchange water cooling component structure isometric view of the application;

[0028] Figure 5 It is an overall structure side view of the application;

[0029] Figure 6 It is an overall structure cross-sectional view of the application;

[0030] Figure 7 It is a cabin cover internal structure cross-sectional view of the application;

[0031] Figure 8 It is a transmission component structure cross-sectional view of the application.

[0032] BRIEF DESCRIPTION OF DRAWINGS: 10, cabin cover; 11, tower body; 12, fan blade; 13, gear box; 14, brake; 15, generator; 16, tooth wall ring; 17, drive motor; 18, drive gear; 19, air permeable cooling component; 191, air permeable box; 192, filter screen; 193, air permeable hole; 20, drainage cooling device; 21, drainage box; 22, opening and closing component; 221, L-shaped opening and closing plate; 222, electric cylinder; 23, air flow heat dissipation component; 231, air flow heat dissipation box; 232, flow guide box; 233, exhaust hole; 30, water collecting device; 31, water storage tank; 32, rainwater collecting component; 321, rainwater collecting box; 322, screen; 323, sewage outlet; 324, first electromagnetic valve; 33, cooling water collecting component; 331, base block; 3311, funnel hole; 3312, semiconductor cooling fin; 332, steam-water separator; 40, heat exchange water cooling component; 401, heat dissipation water tank; 402, booster pump; 41, heat conduction component; 411, hollow pipe; 412, heat conduction fin; 413, second electromagnetic valve; 42, water body cooling component; 421, cooling cover pipe; 422, interlayer; 423, fourth electromagnetic valve; 43, transmission component; 431, third electromagnetic valve; 432, transmission pipe. DETAILED DESCRIPTION

[0033] In order to facilitate the understanding of the present application, the present application will be described in more detail below with reference to the relevant drawings, which show several embodiments of the present application. However, the present application can be implemented in different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the disclosure of the present application more thorough and comprehensive.

[0034] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can be a middle element, and when an element is referred to as being "connected to" another element, it can be directly connected to the other element or there can be a middle element. The terms "vertical", "horizontal", "left", "right", and similar expressions used herein are for illustrative purposes only.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0036] Reference will now be made to the drawings, in which Figure 1 , 2, 3, 5, 7, in a preferred embodiment of the application, an internal motor cooling system of a wind turbine, comprising a nacelle cover 10, the bottom of the nacelle cover 10 is rotatably connected to the tower body 11, one end of the nacelle cover 10 is provided with a fan blade 12, the inner wall bottom of the nacelle cover 10 is provided with a gear box 13, a brake 14 and a generator 15 connected in sequence, the gear box 13 is connected to the fan blade 12 through the rotating shaft, the sidewall of the tower body 11 is sleeved with a tooth wall ring 16, the inner wall bottom of the nacelle cover 10 is provided with a plurality of drive motors 17, the drive motor 17 execution end is provided with a drive gear 18 meshing with the tooth wall ring 16, the sidewall of the nacelle cover 10 is provided with a plurality of air cooling components 19, the top of the nacelle cover 10 is provided with a drainage cooling device 20, the drainage cooling device 20 comprises a drainage box 21 arranged at the top of the nacelle cover 10, an opening and closing component 22 arranged at one end of the drainage box 21 close to the fan blade 12, and an air flow cooling component 23 arranged outside the generator 15 and having an air inlet end communicated with the other end of the drainage box 21, the air cooling component 19 comprises an air permeable box 191 communicated with the nacelle cover 10 through the sidewall, a filter screen 192 arranged at one end of the air permeable box 191 close to the fan blade 12, and an air permeable hole 193 arranged at one end of the nacelle cover 10 away from the fan blade 12, the opening and closing component 22 comprises an L-shaped opening and closing plate 221 penetrating through the top of the drainage box 21 and extending into the drainage box 21, and a plurality of electric cylinders 222 arranged at the top of the L-shaped opening and closing plate 221 and having execution ends penetrating through the L-shaped opening and closing plate 221 and connecting the top of the drainage box 21, the air flow cooling component 23 comprises an air flow cooling box 231 arranged at the inner wall bottom of the nacelle cover 10 and covering the outside of the generator 15, a flow guide box 232 having one end communicated with the outer wall of the air flow cooling box 231 and the other end communicated with the end of the drainage box 21, and a plurality of exhaust holes 233 having one end communicated with the air flow cooling box 231 and the other end communicated with the nacelle cover 10.

[0037] It should be noted that in this embodiment, when the wind turbine is working, the wind drives the fan blade 12 to rotate, the fan blade 12 drives the generator 15 to rotate through the transmission of the gear box 13 and the brake 14, and the generator 15 generates electricity, when the wind direction changes, the drive gear 18 at the execution end of the plurality of drive motors 17 drives the tooth wall ring 16 to perform circular motion, so as to drive the nacelle cover 10 to rotate;

[0038] The air flow can enter the air permeable box 191 through the filter screen 192 and enter the nacelle cover 10 through the air permeable box 191, and the air flow is discharged through the air permeable hole 193 after heat exchange in the nacelle cover 10, so as to cool the nacelle cover 10;

[0039] When the generator 15 is air-cooled, the electric cylinder 222 drives the L-shaped opening and closing plate 221 to move upwards, so that the air inlet of the flow guide box 21 is opened, and the air entering the flow guide box 21 passes through the cooling water collecting part 33 and the flow guide box 232 in turn to reach the air flow heat dissipation box 231, and is discharged through the exhaust hole 233 after heat exchange in the air flow heat dissipation box 231.

[0040] Please refer to the drawings Figure 2 , 3 , 6, in another preferred embodiment of the present application, the inner wall top of the nacelle cover 10 is provided with a water collecting device 30, the water collecting device 30 comprises a water storage tank 31 provided on the inner wall top of the nacelle cover 10, a rainwater collecting part 32 provided on the top of the flow guide box 21 and connected to the water storage tank 31 through a pipeline, and a cooling water collecting part 33 provided in the flow guide box 21 and connected to the water storage tank 31 through a pipeline; the rainwater collecting part 32 comprises a rainwater collecting box 321 provided on the top of the flow guide box 21, a screen 322 obliquely provided on the inner wall of the rainwater collecting box 321, and a sewage outlet 323 penetrating the side wall of the rainwater collecting box 321 and located at the lowest part of the screen 322, the side wall of the rainwater collecting box 321 is provided with a first electromagnetic valve 324, the first electromagnetic valve 324 is connected to the water storage tank 31 through a pipeline, the cooling water collecting part 33 comprises a base block 331 and a steam-water separator 332 provided in the flow guide box 21 in sequence, a plurality of funnel holes 3311 are penetratingly provided on the side wall of the base block 331, and a semiconductor refrigeration sheet 3312 is embedded on the side wall of each funnel hole 3311, the steam-water separator 332 is connected to the water storage tank 31 through a pipeline at the water outlet end, and the steam-water separator 332 is connected to the flow guide box 232 at the air outlet end.

[0041] It should be noted that in this embodiment, the collection of water resources mainly relies on rainwater and condensed water, when collecting rainwater, the rainwater is filtered through the screen 322 and enters the rainwater collecting box 321, the first electromagnetic valve 324 is opened, and the rainwater can enter the water storage tank 31, the screen 322 is obliquely arranged to facilitate the discharge of sundries through the sewage outlet 323, so as to prevent the screen 322 from being blocked;

[0042] When collecting condensed water, the semiconductor refrigeration sheet 3312 is turned on, the semiconductor refrigeration sheet 3312 cools the air passing through the funnel hole 3311 to form condensed water in the air, the air containing condensed water enters the steam-water separator 332, the steam-water separator 332 screens the water in the air and discharges the water into the water storage tank 31, and the gas after screening is transmitted to the air flow heat dissipation part 23.

[0043] Please refer to the drawings Figure 2 , 4, 8, in another preferred embodiment of the present application, the bottom of the cabin cover 10 is provided with a heat exchange water cooling component 40, the sidewall of the generator 15 is provided with a plurality of liquid outlet through pipes which are connected to the heat dissipation component 41 of the heat exchange water cooling component 40, the outer wall of the driving motor 17 is provided with a water body cooling component 42 which is connected to the heat exchange water cooling component 40 through a liquid outlet through pipe, the sidewall of the water storage tank 31 is provided with a transmission component 43 which is used for transmitting water to the heat dissipation component 41 and the water body cooling component 42, the heat exchange water cooling component 40 is connected to the water storage tank 31 through a pipe, the heat exchange water cooling component 40 comprises a heat dissipation water tank 401 which is arranged at the bottom of the cabin cover 10, and a booster pump 402 which is arranged at the bottom of the heat dissipation water tank 401 and whose execution end is connected to the heat dissipation water tank 401, the heat dissipation water tank 401 is connected to the water storage tank 31 through a pipe, the heat dissipation component 41 comprises a hollow pipe 411 which is arranged at the sidewall of the generator 15, and a plurality of heat conduction sheets 412 which are arranged at the inner wall of the hollow pipe 411 and whose one end extends into the generator 15, the liquid outlet end of the hollow pipe 411 is connected to a second electromagnetic valve 413 which is arranged at the sidewall of the heat dissipation water tank 401 through a pipe, the transmission component 43 comprises a third electromagnetic valve 431 which is arranged at the sidewall of the water storage tank 31, and a transmission pipe 432 which is connected to the third electromagnetic valve 431 at one end and connected to a plurality of hollow pipes 411 at the other end, the water body cooling component 42 comprises a cooling cover pipe 421 which is arranged at the inner bottom of the cabin cover 10 and covers the outside of the driving motor 17, and a sandwich layer 422 which is arranged in the cooling cover pipe 421, the top of the sandwich layer 422 is connected to the transmission pipe 432 through a pipe, and the sidewall bottom of the sandwich layer 422 is connected to a fourth electromagnetic valve 423 which is arranged at the sidewall of the heat dissipation water tank 401 through a pipe.

[0044] It should be noted that, in the embodiment, the heat conduction sheets 412 in the hollow pipe 411 facilitate heat dissipation of the key heating parts of the generator 15, when the transmission component 43 works, the third electromagnetic valve 431 is opened, the water in the water storage tank 31 enters the transmission pipe 432 through a pipe, and then enters the hollow pipe 411 and the sandwich layer 422 through the transmission pipe 432, the water in the hollow pipe 411 cools the heat conduction sheets 412, and the water in the sandwich layer 422 cools the driving motor 17, the second electromagnetic valve 413 is opened, the hot water in the hollow pipe 411 can enter the heat dissipation water tank 401 through a pipe, and the fourth electromagnetic valve 423 is opened, the hot water in the sandwich layer 422 can enter the heat dissipation water tank 401 through a pipe.

[0045] Further, the water in the heat dissipation water tank 401 can be discharged through a pipe, or after cooling, the booster pump 402 is opened to transmit the water in the heat dissipation water tank 401 to the water storage tank 31 through a pipe, so as to recycle the water.

[0046] The specific process of the present application is as follows:

[0047] When the wind turbine is working, the fan blades 12 are rotated by the wind, and the fan blades 12 are rotated to drive the generator 15 through the gear box 13 and the brake 14, and the generator 15 generates electricity, when the wind direction changes, the multiple drive motors 17 drive the drive gears 18 to rotate, and the drive gears 18 rotate around the toothed wall ring 16 to drive the nacelle cover 10 to rotate;

[0048] The air flow can enter the air permeable box 191 through the filter screen 192 and enter the nacelle cover 10 through the air permeable box 191, and the air flow is heat exchanged in the nacelle cover 10 and then discharged through the air permeable hole 193 to cool the nacelle cover 10;

[0049] When the generator 15 is cooled by air flow, the electric cylinder 222 drives the L-shaped opening and closing plate 221 to move upwards to open the air inlet of the flow guide box 21, and the air flow entering the flow guide box 21 passes through the cooling water collecting part 33 and the flow guide box 232 in turn to reach the air flow heat dissipation box 231, and is heat exchanged in the air flow heat dissipation box 231 and then discharged through the exhaust hole 233;

[0050] The collection of water resources mainly relies on rainwater and condensed water, when the rainwater is collected, the rainwater is filtered through the screen 322 and enters the rainwater collection box 321, the first electromagnetic valve 324 is opened, and the rainwater can enter the water storage tank 31, and the screen 322 is inclined to facilitate the discharge of sundries through the sewage outlet 323 to prevent the screen 322 from being blocked;

[0051] When the condensed water is collected, the semiconductor refrigeration sheet 3312 is opened, the semiconductor refrigeration sheet 3312 cools the air passing through the hopper hole 3311 to form condensed water in the air, the air containing condensed water enters the steam-water separator 332, the steam-water separator 332 separates the water in the air and discharges the water into the water storage tank 31, and the gas after screening the water is transmitted to the air flow heat dissipation part 23;

[0052] The heat conduction sheet 412 in the hollow pipe 411 facilitates the heat conduction of the key heat generating parts of the generator 15, when the transmission part 43 works, the third electromagnetic valve 431 is opened, the water in the water storage tank 31 enters the transmission pipe 432 through the pipeline, and then enters the hollow pipe 411 and the interlayer 422 through the transmission pipe 432, the water in the hollow pipe 411 cools the heat conduction sheet 412, and the water in the interlayer 422 cools the drive motor 17, the second electromagnetic valve 413 is opened, the hot water in the hollow pipe 411 can enter the heat dissipation water tank 401 through the pipeline, and the fourth electromagnetic valve 423 is opened, the hot water in the interlayer 422 can enter the heat dissipation water tank 401 through the pipeline;

[0053] The water in the heat dissipation water tank 401 can be discharged through the pipeline, or after being cooled, the booster pump 402 is opened to transmit the water in the heat dissipation water tank 401 to the water storage tank 31 through the pipeline, so as to realize the recycling of the water.

[0054] The application is described above by way of example with reference to the accompanying drawings, and it is obvious that the specific implementation of the application is not limited to the above-described manner, and as long as such non-essential improvements are made by adopting the method concept and technical solutions of the application, or the concept and technical solutions of the application are directly applied to other occasions without improvement, they are all within the protection scope of the application.

Claims

1. An internal motor cooling system for a wind turbine generator set, comprising a nacelle cover (10), the bottom of which is rotatably connected to the tower body (11), and one end of the nacelle cover (10) is provided with fan blades (12), characterized in that... The bottom of the inner wall of the nacelle cover (10) is provided with a gearbox (13), a brake (14) and a generator (15) connected in sequence. The gearbox (13) is connected to the fan blade (12) through a rotating shaft. The side wall of the tower body (11) is fitted with a toothed wall ring (16). The bottom of the inner wall of the nacelle cover (10) is provided with multiple drive motors (17). The actuating end of the drive motor (17) is provided with a drive gear (18) that meshes with the toothed wall ring (16). The side wall of the nacelle cover (10) is provided with multiple breathable cooling components (19). The top of the nacelle cover (10) is provided with a cooling device (20). The cooling device (20) includes a cooling box (21) on the top of the nacelle cover (10), an opening and closing component (22) on the cooling box (21) near the fan blade (12), and an airflow heat dissipation component (23) covering the outside of the generator (15) and having its air intake end connected to the other end of the cooling box (21). The top of the inner wall of the cabin cover (10) is provided with a water collection device (30). The water collection device (30) includes a water storage tank (31) located at the top of the inner wall of the cabin cover (10), a rainwater collection component (32) located at the top of the drainage box (21) and connected to the water storage tank (31) through a pipe, and a cooling water collection component (33) located inside the drainage box (21) and connected to the water storage tank (31) through a pipe. The bottom of the engine room cover (10) is provided with a heat exchange water cooling component (40). The side wall of the generator (15) is provided with a heat outlet component (41) with multiple drain ends connected to the heat exchange water cooling component (40) through pipes. The outer wall of the drive motor (17) is fitted with a water cooling component (42) with drain ends connected to the heat exchange water cooling component (40) through pipes. The side wall of the water storage tank (31) is provided with a transmission component (43) for transmitting water to the heat outlet component (41) and the water cooling component (42). The heat exchange water cooling component (40) is connected to the water storage tank (31) through pipes.

2. The internal motor cooling system of a wind turbine generator set according to claim 1, characterized in that, The breathable cooling component (19) includes a breathable box (191) with its sidewall connected to the nacelle cover (10), a filter (192) disposed at one end of the breathable box (191) near the fan blade (12), and a breathable hole (193) passing through the end of the nacelle cover (10) away from the fan blade (12).

3. The internal motor cooling system of a wind turbine generator set according to claim 1, characterized in that, The opening and closing component (22) includes an L-shaped opening and closing plate (221) with one end penetrating through the top of the drainage box (21) and extending into the drainage box (21), and a plurality of electric cylinders (222) disposed on the top of the L-shaped opening and closing plate (221) and having the actuating end penetrating through the L-shaped opening and closing plate (221) and connected to the top of the drainage box (21).

4. The internal motor cooling system of a wind turbine generator set according to claim 1, characterized in that, The airflow cooling component (23) includes an airflow cooling box (231) located at the bottom of the inner wall of the nacelle cover (10) and covering the outside of the generator (15), a guide box (232) with one end connected to the outer wall of the airflow cooling box (231) and the other end connected to the end of the guide box (21), and a plurality of exhaust holes (233) with one end connected to the airflow cooling box (231) and the other end connected to the nacelle cover (10).

5. The internal motor cooling system of a wind turbine generator set according to claim 1, characterized in that, The rainwater collection component (32) includes a rainwater collection box (321) located on top of the drainage box (21), a screen (322) inclined to the inner wall of the rainwater collection box (321), and a drain outlet (323) passing through the side wall of the rainwater collection box (321) and located at the lowest point of the screen (322). The side wall of the rainwater collection box (321) is provided with a first solenoid valve (324), which is connected to the water storage tank (31) through a pipe.

6. The internal motor cooling system of a wind turbine generator set according to claim 4, characterized in that, The cooling water collection component (33) includes a base block (331) and a steam-water separator (332) sequentially disposed in the drainage box (21). The base block (331) has a plurality of funnel holes (3311) through its side wall. Each funnel hole (3311) has a semiconductor cooling chip (3312) embedded in its side wall. The drain end of the steam-water separator (332) is connected to the water storage tank (31) through a pipe, and the exhaust end of the steam-water separator (332) is connected to the guide box (232).

7. The internal motor cooling system of a wind turbine generator set according to claim 1, characterized in that, The heat exchange water cooling component (40) includes a heat dissipation water tank (401) located at the bottom of the nacelle cover (10), and a booster pump (402) located at the bottom of the heat dissipation water tank (401) and connected to the heat dissipation water tank (401) by means of an actuation end. The heat dissipation water tank (401) is connected to a water storage tank (31) through a pipe.

8. The internal motor cooling system of a wind turbine generator set according to claim 7, characterized in that, The heat dissipation component (41) includes a hollow tube (411) disposed on the side wall of the generator (15), a plurality of heat-conducting fins (412) disposed on the inner wall of the hollow tube (411) and extending one end into the generator (15), and the drain end of the hollow tube (411) is connected to a second solenoid valve (413) disposed on the side wall of the heat dissipation tank (401) through a pipe.

9. The internal motor cooling system of a wind turbine generator set according to claim 8, characterized in that, The transmission component (43) includes a third solenoid valve (431) disposed on the side wall of the water storage tank (31), and a transmission pipe (432) with one end connected to the third solenoid valve (431) and the other end connected to a plurality of hollow pipes (411).

10. The internal motor cooling system of a wind turbine generator set according to claim 9, characterized in that, The water cooling component (42) includes a cooling cover tube (421) located at the bottom of the inner wall of the engine room cover (10) and covering the outside of the drive motor (17), a jacket (422) located inside the cooling cover tube (421), the top of the jacket (422) being connected to the transmission pipe (432) via a pipe, and the bottom of the side wall of the jacket (422) being connected to the fourth solenoid valve (423) located on the side wall of the heat dissipation tank (401) via a pipe.

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