Heat dissipation device of wind driven generator and wind driven generator set

Abstract

The invention discloses a heat dissipation device of a wind driven generator and a wind driven generator set, and belongs to the technical field of generators. Through holes are uniformly formed in the side wall of the shell and are uniformly and circumferentially distributed; a flow guide cavity is formed in the end, located in the shell, of the heat conduction rod; the portion, located in the shell, of the heat conduction rod is sleeved with a metal corrugated pipe, and the two ends of the corrugated pipe are fixedly connected with the side wall of the heat conduction rod and the inner side wall of the shell respectively. By arranging the corrugated pipe, dust in external air can be prevented from penetrating through a gap between the heat conduction rod and the through hole to enter the shell; according to the scheme, through mutual cooperation of the corrugated pipe, the heat conduction rod and the driving mechanism, when the heat conduction rod extends out of the surface of the shell, external airflow directly impacts the heat conduction rod, and under the action of heat exchange, heat of hot air in the shell is transmitted to the heat conduction rod through the flow guide cavity and then transmitted to external air through the side wall of the heat conduction rod; therefore, the heat dissipation effect of the interior of the shell is improved.

Description

Technical Field

[0001] This invention relates to the field of generator technology, and more specifically, to a wind turbine heat dissipation device and a wind turbine generator set. Background Technology

[0002] A wind turbine is the core equipment that converts wind energy into electrical energy. Its basic principle is that wind energy drives the rotor to rotate, which in turn drives the generator rotor to rotate through the transmission system. This causes the conductive windings (coils) inside the generator to move relative to the magnetic field, thereby generating an induced electromotive force and outputting current, thus realizing the electromechanical energy conversion.

[0003] However, during this energy conversion process, due to the inherent resistance (impedance) of the generator windings, Joule losses (P=I²R) are inevitable when current flows through them. This lost electrical energy is ultimately released as heat. If this heat cannot be dissipated in a timely and effective manner, it will accumulate inside the generator, causing the operating temperature of key generator components (especially the insulated windings) to rise continuously.

[0004] Excessive generator temperature rise can lead to serious consequences: First, the winding resistance increases with temperature, resulting in increased copper losses and a vicious cycle of reduced efficiency. Second, high temperatures accelerate the aging, embrittlement, and even decomposition of insulation materials, significantly shortening the generator's lifespan. In extreme cases, it may induce insulation breakdown, short circuits, and other faults, causing permanent equipment damage or safety accidents. Third, for permanent magnet generators, high temperatures can easily cause irreversible demagnetization of the permanent magnets, directly degrading the generator's performance.

[0005] Currently, some small and medium-sized or early-designed wind turbines mainly rely on natural convection and radiation on the casing surface for heat exchange with flowing air. This passive cooling method is limited by ambient wind speed and temperature, and its capacity is limited and unstable. Under continuous high-power output conditions, the imbalance between heat generation and dissipation can easily lead to generator overheating and reduced reliability. Especially in dusty environments, particulate matter accumulates on the heat dissipation surface, forming a layer of insulating dirt that increases thermal resistance, further hindering heat dissipation and accelerating performance degradation.

[0006] Therefore, a wind turbine cooling device and a wind turbine generator set are proposed. Summary of the Invention

[0007] To address the problems existing in the prior art, the present invention aims to provide a wind turbine heat dissipation device and a wind turbine generator set, which can improve the heat dissipation effect by increasing the contact probability between the hot airflow inside the casing and the casing, while blowing away dust on the surface of the casing to ensure that the casing is directly exposed to the air.

[0008] To solve the above problems, the present invention adopts the following technical solution.

[0009] A heat dissipation device for a wind turbine includes a housing; The sidewalls of the shell are evenly provided with through holes, which are evenly distributed circumferentially; A heat-conducting rod is slidably installed inside the through hole, and a flow guide cavity is opened at one end of the heat-conducting rod located inside the shell. The portion of the heat-conducting rod located inside the housing is fitted with a metal bellows, with both ends of the bellows fixedly connected to the side wall of the heat-conducting rod and the inner side wall of the housing, respectively. The bellows prevents dust from the outside air from entering the housing through the gap between the heat-conducting rod and the through hole. Furthermore, the housing is equipped with a drive mechanism for moving the heat-conducting rod; A circular ring is fixedly installed inside the shell. Elastic airbags corresponding to the heat-conducting rods are evenly fixedly installed on the inner side wall of the circular ring. Holes communicating with the shell are opened on the side wall of the elastic airbags, and a compression mechanism for squeezing the elastic airbags is provided in the shell.

[0010] Furthermore, the extrusion mechanism includes a rotating shaft that is rotatably inserted into the end face of the housing. The end of the rotating shaft located outside the housing is uniformly provided with blades, and the blades are the drive blades of the wind turbine, which is existing technology and will not be described in detail here. The rotating shaft passes through the circular sleeve, and compression blocks that cooperate with the elastic airbag are evenly fixed on the side wall of the rotating shaft.

[0011] Furthermore, the driving mechanism includes pneumatic telescopic rods uniformly and fixedly installed on the outer ring side of the circular ring sleeve. The pneumatic telescopic rods correspond one-to-one with the heat-conducting rods, and the output end of the pneumatic telescopic rod is fixedly connected to the end of the corresponding heat-conducting rod. An elastic diaphragm is fixedly installed inside the elastic airbag, which divides the elastic airbag into a first cavity and a second cavity. The hole is opened on the side wall of the first cavity, and an air pipe connected to the air inlet of the pneumatic telescopic rod is fixedly installed on the side wall of the second cavity. The pneumatic telescopic rod includes a sleeve, an air inlet, a movable rod, and a spring. One end of the sleeve is open, and the movable rod is slidably inserted into the open end of the sleeve. The spring is fixedly installed between the inner end face of the sleeve and the end face of the movable rod. The air inlet is located on the side wall of the sleeve. The pneumatic telescopic rod is existing technology and will not be described in detail here.

[0012] Under the action of the spring, when the movable rod is not under force, the movable rod is in the state of retracting into the sleeve.

[0013] When the blade is impacted by wind, the blade drives the shaft to rotate, which causes the compression block to intermittently compress the elastic airbag. When the elastic airbag is compressed, the gas in the first cavity is discharged through the hole. At this time, the discharged airflow drives the gas flow in the shell, thereby increasing the probability of the airflow in the shell contacting the inner wall of the shell and improving the heat dissipation effect of the gas in the shell.

[0014] When the elastic airbag is squeezed, the gas discharged from the second cavity is released into the sleeve through the air tube. At this time, the air pressure in the sleeve increases, and the thrust of the air pressure in the sleeve on the movable rod is greater than the elastic force of the spring. At this time, the movable rod extends out of the sleeve and drives the heat-conducting rod away from the mounting sleeve, thereby driving the heat-conducting rod to move.

[0015] When the heat-conducting rod extends from the surface of the shell, the external airflow directly impacts the heat-conducting rod. At this time, under the action of heat exchange, the heat of the hot air inside the shell is transferred to the heat-conducting rod through the flow channel, and then transferred to the outside air through the side wall of the heat-conducting rod, thereby improving the heat dissipation effect inside the shell.

[0016] When the elastic airbag disengages from the compression block, the elastic airbag recovers and absorbs gas from the shell through the holes, thus preparing it for operation again.

[0017] Furthermore, a groove is provided on the side wall of the heat-conducting rod near the blade. The groove is arc-shaped, and a conduit penetrating the heat-conducting rod is inserted into the side wall of the groove.

[0018] Because the groove is curved, the direction of the airflow entering the groove will be changed, and the airflow in the groove will eventually enter the duct.

[0019] Because the conduit is angled, the gas discharged from the conduit will impact the outer wall of the housing, thereby increasing the impact force on the dust adhering to the outer wall of the housing, blowing away the dust, improving the thermal conductivity of the housing, and thus improving the heat dissipation effect inside the housing.

[0020] Furthermore, the heat-conducting rod has evenly distributed annular heat dissipation grooves on its sidewall.

[0021] By setting up heat dissipation grooves, the contact area between the heat-conducting rod and the external environment is increased, thus improving the heat dissipation effect of the heat-conducting rod.

[0022] Furthermore, a connecting rod is installed between the output end of the pneumatic telescopic rod and the heat-conducting rod, thereby creating a gap between the output end of the pneumatic telescopic rod and the end face of the heat-conducting rod. This ensures that the flow guide cavity can communicate with the inside of the shell, thus ensuring that the high-temperature gas inside the shell can enter the flow guide cavity.

[0023] Furthermore, a drainage pipe is fixedly installed in the hole, extending into the guide cavity. This ensures that the hot airflow can enter the guide cavity in a timely manner during the exhaust process of the hole, and then transfer the heat to the outside air in contact with the heat-conducting rod through heat exchange.

[0024] Furthermore, an elastic rope is fixedly installed at the end of the conduit away from the groove, and a spherical baffle is sleeved on the elastic rope.

[0025] During the exhaust process in the duct, the airflow blows the baffle block, causing it to sway continuously under the action of the elastic rope. With the help of the baffle block's arc-shaped surface, the airflow diffusion range is expanded, and the contact area with the outer wall of the casing is also increased, thereby improving the cleaning effect of the casing surface and exposing the casing surface directly to the air, thus improving the casing's heat dissipation effect.

[0026] A type of wind turbine generator set; Includes: gearbox, generator body, and transformer; The drive shaft of the gearbox is fixedly connected to the rotating shaft; The drive shaft of the generator body is fixedly connected to the output shaft of the gearbox; The transformer is electrically connected to the generator body.

[0027] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) This scheme uses the cooperation of the bellows, heat-conducting rod and drive mechanism. When the heat-conducting rod extends from the surface of the shell, the external airflow directly impacts the heat-conducting rod. At this time, under the action of heat exchange, the heat of the hot air in the shell is transferred to the heat-conducting rod through the flow channel, and then transferred to the outside air through the side wall of the heat-conducting rod, thereby improving the heat dissipation effect inside the shell.

[0028] (2) This scheme uses the cooperation of the elastic airbag and the extrusion mechanism. When the blade is impacted by the wind, the blade drives the shaft to rotate, which enables the extrusion block to intermittently extrude the elastic airbag. When the elastic airbag is extruded, the gas in the first cavity is discharged through the hole. At this time, the discharged airflow drives the gas in the shell to flow, thereby increasing the probability of the airflow in the shell contacting the inner wall of the shell and improving the heat dissipation effect of the gas in the shell.

[0029] (3) This solution uses the cooperation between the groove and the conduit. Since the groove is an arc surface, the airflow direction entering the groove will be changed, and the airflow in the groove will eventually enter the conduit. Since the conduit is set at an angle, the gas discharged from the conduit will impact the outer wall of the shell, thereby increasing the impact force on the dust attached to the outer wall of the shell, blowing away the dust attached to the outer wall of the shell, improving the heat conduction effect of the shell, and playing the role of improving the heat dissipation effect inside the shell. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a front cross-sectional view of the housing of the present invention; Figure 3 For the present invention Figure 2 Enlarged structural diagram at point A; Figure 4 For the present invention Figure 3Enlarged structural diagram at point B; Figure 5 This is a schematic diagram of the combined structure of the circular sleeve and the pneumatic telescopic rod of the present invention; Figure 6 This is a schematic diagram of the structure of the heat-conducting rod of the present invention.

[0031] Explanation of the labels in the diagram: 1. Shell; 2. Transformer; 3. Heat-conducting rod; 4. Flow guiding cavity; 5. Bellows; 6. Circular sleeve; 7. Elastic airbag; 8. Hole; 9. Shaft; 10. Blade; 11. Extrusion block; 12. Pneumatic telescopic rod; 1201. Sleeve; 1202. Movable rod; 1203. Air inlet; 1204. Spring; 13. Diaphragm; 14. First cavity; 15. Second cavity; 16. Air pipe; 17. Groove; 18. Conduit; 19. Heat dissipation groove; 20. Connecting rod; 21. Drainage pipe; 22. Elastic rope; 23. Baffle block; 24. Gearbox; 25. Generator body. Detailed Implementation

[0032] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0033] Example 1: Please see Figures 1 to 6 A wind turbine heat dissipation device includes a housing 1; Through holes are evenly distributed on the side wall of the shell 1. A heat-conducting rod 3 is slidably installed inside the through hole, and a flow guide cavity 4 is opened at one end of the heat-conducting rod 3 located inside the shell 1. A metal bellows 5 is fitted inside the housing 1 to the part of the heat-conducting rod 3. The two ends of the bellows 5 are fixedly connected to the side wall of the heat-conducting rod 3 and the inner side wall of the housing 1, respectively. By setting the bellows 5, dust in the outside air can be prevented from passing through the gap between the heat-conducting rod 3 and the through hole and entering the housing 1. Furthermore, the housing 1 is equipped with a drive mechanism for moving the heat-conducting rod 3; A circular ring sleeve 6 is fixedly installed inside the housing 1. Elastic airbags 7, which correspond one-to-one with the heat-conducting rods 3, are evenly fixedly installed on the inner side wall of the circular ring sleeve 6. Holes 8 communicating with the housing 1 are opened on the side wall of the elastic airbags 7, and a compression mechanism for compressing the elastic airbags 7 is provided in the housing 1.

[0034] The extrusion mechanism includes a rotating shaft 9 rotatably inserted into the end face of the housing 1. The end of the rotating shaft 9 located outside the housing 1 is uniformly provided with blades 10, and the blades 10 are the drive blades 10 of the wind turbine generator, which is the prior art and will not be described in detail here. The rotating shaft 9 passes through the circular sleeve 6, and the side wall of the rotating shaft 9 is uniformly fixed with compression blocks 11 that cooperate with the elastic airbag 7.

[0035] The driving mechanism includes pneumatic telescopic rods 12 that are uniformly fixedly installed on the outer ring side of the annular sleeve 6. The pneumatic telescopic rods 12 correspond one-to-one with the heat-conducting rods 3, and the output end of the pneumatic telescopic rod 12 is fixedly connected to the end of the corresponding heat-conducting rod 3. An elastic diaphragm 13 is fixedly installed inside the elastic airbag 7. The diaphragm 13 divides the elastic airbag 7 into a first cavity 14 and a second cavity 15. A hole 8 is opened on the side wall of the first cavity 14. An air pipe 16 connected to the air inlet 1203 of the pneumatic telescopic rod 12 is fixedly installed on the side wall of the second cavity 15. The pneumatic telescopic rod 12 includes a sleeve 1201, an air inlet 1203, a movable rod 1202, and a spring 1204. One end of the sleeve 1201 is open, and the movable rod 1202 is slidably inserted into the open end of the sleeve 1201. The spring 1204 is fixedly installed between the inner end face of the sleeve 1201 and the end face of the movable rod 1202. The air inlet 1203 is opened on the side wall of the sleeve 1201. The pneumatic telescopic rod 12 is existing technology and will not be described in detail.

[0036] Under the action of spring 1204, when the movable rod 1202 is not under force, the movable rod 1202 is in the state of retracting into sleeve 1201.

[0037] When the blade 10 is impacted by the wind, the blade 10 drives the shaft 9 to rotate, which enables the compression block 11 to intermittently compress the elastic airbag 7. When the elastic airbag 7 is compressed, the gas in the first cavity 14 is discharged through the hole 8. At this time, the discharged airflow drives the gas flow in the shell 1, thereby increasing the probability of the airflow in the shell 1 contacting the inner wall of the shell 1 and improving the heat dissipation effect of the gas in the shell 1.

[0038] When the elastic airbag 7 is squeezed, the gas discharged from the second cavity 15 is discharged into the sleeve 1201 through the air pipe 16. At this time, the air pressure in the sleeve 1201 increases, and the pushing force of the air pressure in the sleeve 1201 on the movable rod 1202 is greater than the elastic force of the spring 1204. At this time, the movable rod 1202 extends out of the sleeve 1201 and drives the heat-conducting rod 3 away from the annular sleeve 6, thereby playing the role of driving the heat-conducting rod 3 to move.

[0039] When the heat-conducting rod 3 extends from the surface of the shell 1, the external airflow directly impacts the heat-conducting rod 3. At this time, under the action of heat exchange, the heat of the hot air inside the shell 1 is transferred to the heat-conducting rod 3 through the flow channel 4, and then transferred to the outside air through the side wall of the heat-conducting rod 3, thereby improving the heat dissipation effect inside the shell 1.

[0040] When the elastic airbag 7 disengages from the compression block 11, the elastic airbag 7 recovers and absorbs gas from the housing 1 through the hole 8, thus preparing for the next operation.

[0041] like Figure 6 As shown, a groove 17 is provided on the side wall of the heat-conducting rod 3 near the blade 10. The groove 17 is arc-shaped, and a conduit 18 that penetrates the heat-conducting rod 3 is inserted into the side wall of the groove 17.

[0042] Since the groove 17 is an arc surface, the airflow direction entering the groove 17 will be changed, and the airflow in the groove 17 will eventually enter the duct 18.

[0043] Because the conduit 18 is inclined, the gas discharged from the conduit 18 will impact the outer wall of the housing 1, thereby increasing the impact force on the dust adhering to the outer wall of the housing 1, blowing away the dust adhering to the outer wall of the housing 1, improving the heat conduction effect of the housing 1, and playing a role in improving the heat dissipation effect inside the housing 1.

[0044] like Figure 3 As shown, the heat-conducting rod 3 has evenly distributed annular heat dissipation grooves 19 on its side wall.

[0045] By setting the heat dissipation groove 19, the contact area between the heat conduction rod 3 and the external environment is increased, thus improving the heat dissipation effect of the heat conduction rod 3.

[0046] like Figure 3 As shown, a connecting rod 20 is installed between the output end of the pneumatic telescopic rod 12 and the heat-conducting rod 3, so that there is a gap between the output end of the pneumatic telescopic rod 12 and the end face of the heat-conducting rod 3, ensuring that the flow guide cavity 4 can communicate with the inside of the shell 1, thus ensuring that the high-temperature gas inside the shell 1 can enter the flow guide cavity 4.

[0047] like Figure 3 As shown, a drain pipe 21 is fixedly installed in the hole 8. The drain pipe 21 extends into the guide cavity 4, thereby ensuring that the hot airflow can enter the guide cavity 4 in a timely manner during the exhaust process of the hole 8, and then transfer the heat to the outside air in contact with the heat-conducting rod 3 through heat exchange.

[0048] like Figure 4 As shown, an elastic rope 22 is fixedly installed at the end of the conduit 18 away from the groove 17, and a spherical baffle 23 is sleeved on the elastic rope 22.

[0049] During the exhaust process of the duct 18, the airflow blows the baffle block 23, causing it to sway continuously under the action of the elastic rope 22. With the help of the arc-shaped surface of the baffle block 23, the airflow diffusion range is expanded, and the contact area with the outer wall of the housing 1 is also increased, thereby improving the cleaning effect of the housing 1 surface, allowing the housing 1 surface to be directly exposed to the air, and improving the heat dissipation effect of the housing 1.

[0050] A wind turbine generator set includes: a gearbox 24, a generator body 25, and a transformer 2; The drive shaft of the gearbox 24 is fixedly connected to the rotating shaft 9; The drive shaft of the generator body 25 is fixedly connected to the output shaft of the gearbox 24; Transformer 2 is electrically connected to generator body 25.

[0051] During the rotation of the rotating shaft 9 driven by the blade 10, the gearbox 24 is driven. At this time, the output shaft of the gearbox 24 drives the rotating shaft 9 of the generator body 25 to rotate rapidly, thereby generating electricity through the generator body 25 and adjusting the voltage through the transformer 2.

[0052] Usage: When the blade 10 is impacted by wind, the blade 10 drives the rotating shaft 9 to rotate, thereby enabling the compression block 11 to intermittently compress the elastic airbag 7. When the elastic airbag 7 is compressed, the gas in the first cavity 14 is discharged through the hole 8. At this time, the discharged airflow drives the gas flow in the housing 1, thereby increasing the probability of the airflow in the housing 1 contacting the inner wall of the housing 1 and improving the heat dissipation effect of the gas in the housing 1.

[0053] When the elastic airbag 7 is squeezed, the gas discharged from the second cavity 15 is discharged into the sleeve 1201 through the air pipe 16. At this time, the air pressure in the sleeve 1201 increases, and the pushing force of the air pressure in the sleeve 1201 on the movable rod 1202 is greater than the elastic force of the spring 1204. At this time, the movable rod 1202 extends out of the sleeve 1201 and drives the heat-conducting rod 3 away from the mounting sleeve, thereby playing the role of driving the heat-conducting rod 3 to move.

[0054] When the heat-conducting rod 3 extends from the surface of the shell 1, the external airflow directly impacts the heat-conducting rod 3. At this time, under the action of heat exchange, the heat of the hot air inside the shell 1 is transferred to the heat-conducting rod 3 through the flow channel 4, and then transferred to the outside air through the side wall of the heat-conducting rod 3, thereby improving the heat dissipation effect inside the shell 1.

[0055] When the elastic airbag 7 disengages from the compression block 11, the elastic airbag 7 recovers and absorbs gas from the housing 1 through the hole 8, thus preparing for the next operation.

[0056] Since the groove 17 is an arc surface, the airflow direction entering the groove 17 will be changed, and the airflow in the groove 17 will eventually enter the duct 18.

[0057] Because the conduit 18 is inclined, the gas discharged from the conduit 18 will impact the outer wall of the housing 1, thereby increasing the impact force on the dust adhering to the outer wall of the housing 1, blowing away the dust adhering to the outer wall of the housing 1, improving the heat conduction effect of the housing 1, and playing a role in improving the heat dissipation effect inside the housing 1.

[0058] By setting the heat dissipation groove 19, the contact area between the heat conduction rod 3 and the external environment is increased, thus improving the heat dissipation effect of the heat conduction rod 3.

[0059] During the exhaust process of the duct 18, the airflow blows the baffle block 23, causing it to sway continuously under the action of the elastic rope 22. With the help of the arc-shaped surface of the baffle block 23, the airflow diffusion range is expanded, and the contact area with the outer wall of the housing 1 is also increased, thereby improving the cleaning effect of the housing 1 surface, allowing the housing 1 surface to be directly exposed to the air, and improving the heat dissipation effect of the housing 1.

[0060] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concepts, should be covered within the scope of protection of the present invention.

Claims

1. A wind turbine heat dissipation device, comprising a housing (1); Its features are: The sidewall of the housing (1) is provided with through holes evenly distributed; A heat-conducting rod (3) is slidably installed in the through hole, and a flow-guiding cavity (4) is opened at one end of the heat-conducting rod (3) located in the shell (1). The heat-conducting rod (3) is fitted with a metal corrugated tube (5) inside the shell (1), and the two ends of the corrugated tube (5) are fixedly connected to the side wall of the heat-conducting rod (3) and the inner side wall of the shell (1), respectively. Furthermore, the housing (1) is provided with a drive mechanism for moving the heat-conducting rod (3); A circular ring sleeve (6) is fixedly installed inside the housing (1). Elastic airbags (7) corresponding to the heat-conducting rods (3) are uniformly fixedly installed on the inner side wall of the circular ring sleeve (6). Holes (8) communicating with the housing (1) are opened on the side wall of the elastic airbags (7). A squeezing mechanism for squeezing the elastic airbags (7) is provided in the housing (1).

2. The wind turbine generator cooling device according to claim 1, characterized in that: The extrusion mechanism includes a rotating shaft (9) that is rotatably inserted into the end face of the housing (1), and blades (10) are evenly provided at one end of the rotating shaft (9) located outside the housing (1). The rotating shaft (9) passes through the circular sleeve (6), and the side wall of the rotating shaft (9) is uniformly fixed with compression blocks (11) that cooperate with the elastic airbag (7).

3. A wind turbine cooling device according to claim 2, characterized in that: The driving mechanism includes pneumatic telescopic rods (12) that are uniformly fixedly installed on the outer ring side of the circular sleeve (6). The pneumatic telescopic rods (12) correspond one-to-one with the heat-conducting rods (3), and the output end of the pneumatic telescopic rods (12) is fixedly connected to the end of the corresponding heat-conducting rods (3).

4. A wind turbine cooling device according to claim 1, characterized in that: The elastic airbag (7) is fixedly installed with a diaphragm (13) of elastic material. The diaphragm (13) divides the elastic airbag (7) into a first cavity (14) and a second cavity (15). The hole (8) is opened on the side wall of the first cavity (14). The second cavity (15) is fixedly installed with an air pipe (16) that communicates with the air inlet (1203) of the pneumatic telescopic rod (12).

5. A wind turbine cooling device according to claim 1, characterized in that: The heat-conducting rod (3) has a groove (17) on the side wall near the blade (10). The groove (17) is arc-shaped, and a conduit (18) that penetrates the heat-conducting rod (3) is inserted into the side wall of the groove (17).

6. A wind turbine cooling device according to claim 1, characterized in that: The heat-conducting rod (3) has annular heat dissipation grooves (19) evenly distributed on its side wall.

7. A wind turbine cooling device according to claim 3, characterized in that: A connecting rod (20) is installed between the output end of the pneumatic telescopic rod (12) and the heat-conducting rod (3).

8. A wind turbine cooling device according to claim 1, characterized in that: A drainage tube (21) is fixedly installed in the hole (8), and the drainage tube (21) extends into the guide cavity (4).

9. A wind turbine cooling device according to claim 5, characterized in that: An elastic rope (22) is fixedly installed at one end of the conduit (18) away from the groove (17), and a spherical baffle (23) is sleeved on the elastic rope (22).

10. A wind turbine generator set, characterized in that, Includes a wind turbine cooling device according to any one of claims 1-9; It also includes: gearbox (24), generator body (25) and transformer (2); The drive shaft of the gearbox (24) is fixedly connected to the rotating shaft (9); The drive shaft of the generator body (25) is fixedly connected to the output shaft of the gearbox (24); The transformer (2) is electrically connected to the generator body (25).

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