Ventilation and heat dissipation system of wind driven generator

Abstract

A ventilation and heat dissipation system of a wind driven generator relates to the technical field of wind driven generators and comprises a cabin, a gear box and a generator are arranged in the cabin, a hub is rotatably arranged at the end of the cabin, a plurality of blades are fixedly mounted on the outer wall of the hub, the input end of the gear box is connected with the hub through a main shaft, and the input end of the generator is connected with the output end of the gear box through a connecting shaft. The outer wall of the generator is sleeved with a jacket, a pumping assembly and a heat dissipation assembly are arranged in the cabin and on the top of the cabin respectively, and the pumping assembly, the heat dissipation assembly and the jacket are connected to form a circulation loop. The heat dissipation assembly comprises a supporting U-shaped plate and a rotating plate, a ventilation groove is formed in the top of the rotating plate in a penetrating mode, a liquid inlet groove, a liquid outlet groove and a plurality of connecting grooves are formed in the rotating plate, a plurality of heat dissipation pipes are arranged in the ventilation groove, a plurality of heat dissipation fins are arranged on the outer walls of the heat dissipation pipes, and the adjacent heat dissipation pipes are communicated through the connecting grooves and form an S-shaped water path. The problem that the dynamic adjustability of the heat dissipation speed of an existing wind driven generator is poor is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wind power generators, in particular to a wind power generator ventilation and heat dissipation system. BACKGROUND

[0002] A wind power generator is a device that converts the kinetic energy of wind into electrical energy, and its core purpose is to produce clean renewable power for society. It captures wind energy by rotating large blades driven by wind, and the blades drive the internal generator to convert mechanical energy into electrical energy, which is then transmitted to the power grid through cables and ultimately to household, factory and enterprise power terminals, providing energy for our production and life.

[0003] When the wind power generator blades rotate, they capture air kinetic energy and efficiently transmit it to the generator through the gearbox, thereby converting it into electrical energy. During the power generation process, a large amount of heat is generated inside the generator due to electromagnetic and resistance losses. To prevent equipment overheating and damage and maintain its efficient and stable operation, a water-cooled jacket structure is designed on the outside of the generator housing. The jacket is connected to an external radiator through a pipeline to form a closed circulation loop, and a circulating pump drives the cooling liquid to continuously flow between the jacket and the radiator. The cooling liquid absorbs the heat generated by the generator when flowing through the water-cooled jacket, and is then transported to the radiator for forced cooling, releasing heat to the external environment and ensuring the safe operation of the generator within the optimal temperature range.

[0004] The existing wind power generator gradually exposes its shortcomings during use, mainly in the following aspects: The heat dissipation speed is poorly adjustable. Specifically, due to the significant instability of outdoor wind speed, when the wind speed is high, the wind power generator blade speed increases, the power generation increases, and the internal generator losses intensify, resulting in a sharp rise in heat generation. At this time, the demand for heat dissipation capacity also increases. Conversely, under low wind speed conditions, the blade speed decreases, the power generation decreases, and the heat generation correspondingly decreases, and the heat dissipation demand weakens. However, the existing wind power generator heat dissipation system usually uses a fixed structure radiator and a constant speed circulating pump, and the radiator area and cooling liquid flow rate cannot be adjusted, resulting in a fixed heat dissipation speed of the heat dissipation system. Therefore, under continuous high wind speed conditions, the heat dissipation capacity is insufficient, causing the generator to overheat and even causing insulation aging or thermal damage. When the wind speed is low for a long time, "overcooling" may occur due to excessive heat dissipation, causing the generator to operate at too low a temperature and affecting its operating efficiency.

[0005] In summary, the existing technology has obvious inconvenience and defects in actual use, so it needs to be improved. SUMMARY

[0006] In view of the defects in the prior art, the technical problem to be solved by the present application is to provide a wind turbine ventilation and heat dissipation system, the heat dissipation speed of the wind turbine can be dynamically adjusted according to the external wind speed change, when the wind speed increases, the effective heat dissipation area of the radiator increases, and at the same time, the circulation speed of the cooling liquid increases, and the heat dissipation speed increases; on the contrary, when the wind speed decreases, the heat dissipation speed decreases, through this dynamic adjustment mechanism which responds to the wind condition in real time, the problems of generator winding overheating and insulation thermal damage caused by insufficient heat dissipation under high wind speed working condition are effectively avoided, and the phenomenon of generator working temperature being too low caused by excessive cooling during low wind speed period is prevented, so that the power generation efficiency is always in the optimal interval, and the service life of the equipment is greatly prolonged.

[0007] To solve the above problems, the present application provides the following technical scheme: A wind turbine ventilation and heat dissipation system, comprising a cabin, the cabin is internally provided with a gear box and a generator, the end of the cabin is rotatably provided with a hub, a plurality of blades are fixedly installed on the outer wall of the hub, the input end of the gear box is connected with the hub through a main shaft, the input end of the generator is connected with the output end of the gear box through a connecting shaft, the outer wall of the generator is sleeved with a jacket, the inside and the top of the cabin are respectively provided with a pumping assembly and a heat dissipation assembly, the pumping assembly, the heat dissipation assembly and the jacket are connected into a circulation loop; The heat dissipation assembly comprises a supporting U-shaped plate and a rotating plate, a ventilation slot is penetratingly arranged at the top of the rotating plate, a liquid inlet groove, a liquid outlet groove and a plurality of connecting grooves are arranged in the rotating plate, a plurality of heat dissipation pipes are arranged in the ventilation slot, a plurality of heat dissipation fins are arranged on the outer wall of the heat dissipation pipes, adjacent heat dissipation pipes are communicated through the connecting grooves and form an S-shaped waterway, the liquid inlet groove and the liquid outlet groove are communicated with the two ends of the S-shaped waterway, outer fixed pipes are fixedly arranged at the opposite ends of the rotating plate, the outer fixed pipes are rotatably connected with the supporting U-shaped plate, the liquid outlet groove and the liquid inlet groove are communicated with the pumping assembly and the jacket; The inside of the cabin is provided with a transmission assembly, the connecting shaft drives one of the outer fixed pipes through the transmission assembly, the connecting shaft simultaneously drives the pumping assembly, the faster the rotating speed of the connecting shaft is, the larger the included angle between the rotating plate and the horizontal plane is, the faster the circulation flow speed of the cooling liquid is, and the faster the heat dissipation speed is.

[0008] As an optimized scheme, the transmission assembly comprises a support L-shaped plate, the connecting shaft penetrates through the support L-shaped plate and is rotationally connected with the support L-shaped plate, a rotating shaft is rotationally arranged on the top of the support L-shaped plate, a lifting plate is arranged above the rotating shaft, a sliding rod is fixedly connected to the bottom of the lifting plate, the bottom end of the sliding rod extends into the rotating shaft and is slidingly connected with the rotating shaft, connecting rods are hingedly connected to the opposite ends of the lifting plate, a counterweight ball is fixedly connected to one end of each connecting rod, a plurality of connecting plates are hingedly connected to the outer wall of each connecting rod, one end of each connecting plate is hingedly connected to the rotating shaft, a driving bevel gear is fixedly sleeved on the outer wall of the connecting shaft, a driven bevel gear that is meshed with the driving bevel gear is fixedly sleeved on the lower outer wall of the rotating shaft, a gear is fixedly sleeved on the outer wall of one of the outer fixed pipes, a rack that is meshed with the gear is slidingly arranged on the inner wall of the support U-shaped plate, and the bottom end of the rack penetrates through the cabin and is rotationally connected with the lifting plate.

[0009] As an optimized scheme, the top of the support L-shaped plate is fixedly provided with a support cylinder, the outer wall of the support cylinder is in an arc shape, and the rotating shaft is located in the support cylinder.

[0010] As an optimized scheme, the inner wall of the support U-shaped plate is fixedly provided with a support strip, and the rack is slidingly connected with the support strip.

[0011] As an optimized scheme, the pumping assembly comprises a pump shell, an impeller is rotationally arranged in the pump shell, a liquid inlet pipe is arranged on the liquid inlet of the pump shell and is connected with a liquid outlet groove, a connecting pipe is arranged on the liquid outlet of the pump shell and is connected with a jacket, a driven shaft is fixedly connected to the end of the impeller, the driven shaft extends to the outside through the pump shell, drive wheels are fixedly sleeved on the outer walls of the connecting shaft and the driven shaft, and the two drive wheels are connected through a transmission belt.

[0012] As an optimized scheme, the inner fixed pipes that are fixedly connected with the rotating plates are arranged in the outer fixed pipes, the two inner fixed pipes are connected with the liquid outlet groove and the liquid inlet groove, the opposite ends of the support U-shaped plate are provided with communication holes, the inner fixed pipes are connected with the communication holes and are rotationally and sealingly connected with the support U-shaped plate, the liquid inlet pipe is connected with one of the communication holes, and the other communication hole is connected with the jacket through the liquid outlet pipe.

[0013] As an optimized scheme, the bottom of the cabin is fixedly provided with a fixed plate, and the driven shaft is rotationally connected with the fixed plate.

[0014] As an optimized scheme, the top of the cabin is fixedly provided with an axial flow fan.

[0015] Compared with the prior art, the beneficial effects of the present application are: 1. External winds drive the blades to rotate, which, driven by the main shaft, gearbox, and connecting shaft, generates electricity. The generator produces heat, and the connecting shaft drives the driven shaft and impeller to rotate, thus circulating the coolant. The coolant is pressurized and discharged from the pump casing, enters the jacket through the connecting pipe to absorb the heat generated by the generator, and then enters the radiator pipe through the outlet pipe for cooling. The cooled coolant then enters the pump casing through the inlet pipe and is pressurized again by the impeller before being discharged. This cycle of coolant circulation cools the generator. The rotating connecting shaft also drives the rotating shaft, lifting plate, and counterweight ball to rotate. When external winds blow, the coolant... When the ambient wind speed increases, the blade rotation speed increases, the generator output increases, and the generated heat increases. The rotation speed of the connecting shaft increases with the blade rotation speed, and the rotation speed of the counterweight ball also increases. The centripetal force required for the counterweight ball increases, causing it to rise in height and thus moving the lifting plate and sliding rod downwards. This, in turn, causes the rack to slide downwards. Driven by the gears, the outer fixed tube drives the rotating plate to rotate, increasing the angle between the rotating plate and the horizontal plane. The axial flow fan continuously provides transverse airflow, increasing the total projected area of ​​the heat dissipation pipes and fins in the airflow direction. The interaction between the heat dissipation pipes and fins and the airflow... The increased contact area of ​​the blades, combined with the increased speed of the driven shaft and the connecting shaft, leads to a faster coolant circulation as the impeller speed increases. This, along with the increased total projected area of ​​the cooling pipes and fins in the airflow direction and the faster coolant circulation, enhances the generator's cooling efficiency. Conversely, when the external wind speed decreases, the reduced total projected area of ​​the cooling pipes and fins and the slower coolant circulation reduce the generator's cooling efficiency. This wind turbine's cooling speed can be dynamically adjusted according to changes in external wind speed. When the wind speed increases, the effective heat dissipation area of ​​the cooling pipes and fins increases, and the coolant circulation speed increases, resulting in improved cooling. Conversely, when the wind speed decreases, the cooling speed decreases. This dynamic adjustment mechanism, responding to wind conditions in real time, effectively avoids overheating of the generator windings and insulation damage caused by insufficient cooling under high wind speed conditions, and also prevents excessively low generator operating temperatures due to overcooling during low wind speed periods. This ensures that the power generation efficiency remains within the optimal range, significantly extending the equipment's service life. 2、When the rotating speed of the blade is raised to a certain value, the rotating plate is rotated to the vertical state and is limited by the limiting plate, at this time, the effective heat dissipation area of the heat dissipation pipe and the heat dissipation fin is the largest, the heat dissipation speed of the generator is the fastest, when the rotating speed of the blade is raised again, the rotating plate does not rotate any more, which ensures that the heat dissipation pipe and the heat dissipation fin dissipate heat to the generator at the best heat dissipation speed, but the rotating speed of the impeller will be raised with the rising of the rotating speed of the connecting shaft, the circulating speed of the cooling liquid is further raised to improve the heat dissipation speed of the generator, after the rotating plate is limited by the limiting plate, the height of the counterweight ball does not change any more, when the external environment wind speed is extremely low, the blade stops rotating, the counterweight ball contacts the supporting cylinder under the action of the gravity, the supporting cylinder provides support for the counterweight ball, at this time, the rotating plate is in the horizontal state; 3、The heat dissipation pipe and the connecting groove jointly form the S-shaped water path, which increases the cooling path of the cooling liquid and ensures the cooling effect of the cooling liquid. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference signs. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0017] Figure 1 It is a structural schematic diagram of the present application; Figure 2 It is a structural schematic diagram of the inside of the engine room of the present application; Figure 3 It is a structural schematic diagram of the heat dissipation assembly of the present application; Figure 4 It is a structural schematic diagram of the inside of the rotating plate of the present application; Figure 5 It is a structural schematic diagram of the transmission assembly of the present application; Figure 6 It is a structural schematic diagram of the inside of the rotating shaft of the present application; Figure 7 It is a structural schematic diagram of the pumping assembly of the present application; Figure 8 It is a structural schematic diagram of the connecting pipeline of the circulating loop of the present application.

[0018] In the diagram: 1-Hub; 2-Gearbox; 3-Blade; 4-Heat dissipation assembly; 5-Nacelle; 6-Jacket; 7-Generator; 8-Pumping assembly; 9-Main shaft; 10-Connecting shaft; 11-Transmission assembly; 12-Support L-shaped plate; 13-Pump casing; 14-Driven shaft; 15-Fixing plate; 16-Connecting pipe; 17-Outlet pipe; 18-Inlet pipe; 19-Drive bevel gear; 20-Driven bevel gear; 21-Rotating shaft; 22-Counterweight ball; 23-Connecting plate; 24- 25-Connecting rod; 26-Lifting plate; 27-Rack; 28-Sliding rod; 29-Support cylinder; 30-Impeller; 31-Transmission wheel; 32-Transmission belt; 33-Gear; 34-Support bar; 35-Rotating plate; 36-Support U-shaped plate; 37-Axial flow fan; 38-Limiting plate; 39-Ventilation slot; 40-External fixed pipe; 41-Internal fixed pipe; 42-Connecting hole; 43-Liquid inlet tank; 44-Heat dissipation fins; 45-Heat dissipation pipe; 46-Liquid outlet tank. Detailed Implementation

[0019] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of the present invention and are therefore intended to limit the scope of protection of the present invention.

[0020] like Figures 1 to 8 As shown, a wind turbine ventilation and heat dissipation system includes a nacelle 5, a gearbox 2 and a generator 7 inside the nacelle 5, a hub 1 rotatably mounted at the end of the nacelle 5, and several blades 3 fixedly mounted on the outer wall of the hub 1. The input end of the gearbox 2 is connected to the hub 1 through a main shaft 9, and the input end of the generator 7 is connected to the output end of the gearbox 2 through a connecting shaft 10. A jacket 6 is fitted on the outer wall of the generator 7. A pumping assembly 8 and a heat dissipation assembly 4 are respectively provided inside and on the top of the nacelle 5. The pumping assembly 8, the heat dissipation assembly 4 and the jacket 6 are connected to form a circulation loop. The heat dissipation assembly 4 includes a supporting U-shaped plate 35 and a rotating plate 34. The top of the rotating plate 34 is provided with a ventilation groove 38. The interior of the rotating plate 34 is provided with an inlet groove 42, an outlet groove 46 and several connecting grooves 45. Several heat dissipation pipes 44 are provided in the ventilation groove 38. Several heat dissipation fins 43 are provided on the outer wall of the heat dissipation pipes 44. Adjacent heat dissipation pipes 44 are connected through the connecting grooves 45 to form an S-shaped water channel. The inlet groove 42 and the outlet groove 46 are connected to the two ends of the S-shaped water channel respectively. External fixing pipes 39 are fixedly provided at opposite ends of the rotating plate 34. The external fixing pipes 39 are rotatably connected to the supporting U-shaped plate 35. The outlet groove 46 and the inlet groove 42 are connected to the pumping assembly 8 and the jacket 6 respectively. The engine compartment 5 is equipped with a transmission assembly 11. The connecting shaft 10 drives one of the external fixed pipes 39 through the transmission assembly 11. The connecting shaft 10 also drives the pumping assembly 8. The faster the connecting shaft 10 rotates, the larger the angle between the rotating plate 34 and the horizontal plane, the faster the coolant circulation flow speed, and the faster the heat dissipation speed.

[0021] The transmission assembly 11 comprises a support L-shaped plate 12, the connecting shaft 10 penetrates through the support L-shaped plate 12 and is rotationally connected with the support L-shaped plate 12, a rotating shaft 21 is arranged on the top of the support L-shaped plate 12, a lifting plate 25 is arranged above the rotating shaft 21, a sliding rod 27 is fixedly connected to the bottom of the lifting plate 25, the bottom end of the sliding rod 27 extends into the rotating shaft 21 and is slidingly connected with the rotating shaft 21, the opposite ends of the lifting plate 25 are hingedly connected with connecting rods 24, the connecting rods 24 are fixedly connected with counterweight balls 22 at one end, a plurality of connecting plates 23 are hingedly connected to the outer wall of the connecting rods 24, the connecting plates 23 are hingedly connected with the rotating shaft 21 at one end, the drive bevel gear 19 is fixedly sleeved on the outer wall of the connecting shaft 10, the driven bevel gear 20 is fixedly sleeved on the lower outer wall of the rotating shaft 21 and is in mesh with the drive bevel gear 19, one of the outer fixed tubes 39 is fixedly sleeved with a gear 32, a rack 26 in mesh with the gear 32 is slidingly arranged on the inner wall of the support U-shaped plate 35, and the bottom end of the rack 26 penetrates through the cabin 5 downwards and is rotationally connected with the lifting plate 25.

[0022] The support L-shaped plate 12 is fixedly provided with a support cylinder 28 on the top, the outer wall of the support cylinder 28 is in an arc shape, and the rotating shaft 21 is located in the support cylinder 28. The inner top of the support U-shaped plate 35 is fixedly connected with a limiting plate 37.

[0023] The support U-shaped plate 35 is fixedly provided with a support strip 33 on the inner wall, and the rack 26 is slidingly connected with the support strip 33.

[0024] The pumping assembly 8 comprises a pump shell 13, the pump shell 13 is rotationally provided with an impeller 29 inside, the inlet liquid pipe 18 is communicated with the liquid outlet groove 46 through the inlet of the pump shell 13, the connecting pipe 16 is communicated with the jacket 6 through the outlet of the pump shell 13, the driven shaft 14 is fixedly connected with the end of the impeller 29, the driven shaft 14 extends to the outside through the pump shell 13 at one end, the outer walls of the connecting shaft 10 and the driven shaft 14 are fixedly sleeved with transmission wheels 30, and the two transmission wheels 30 are connected through a transmission belt 31.

[0025] The inner fixed tube 40 fixedly connected with the rotating plate 34 is arranged in each of the outer fixed tubes 39, the two inner fixed tubes 40 are communicated with the liquid outlet groove 46 and the inlet liquid groove 42 correspondingly, the opposite ends of the support U-shaped plate 35 are penetratingly provided with communication holes 41, the inner fixed tubes 40 are communicated with the communication holes 41 and are rotationally and sealingly connected with the support U-shaped plate 35, the inlet liquid pipe 18 is communicated with one of the communication holes 41, and the other communication hole 41 is communicated with the jacket 6 through the outlet liquid pipe 17.

[0026] The fixed plate 15 is fixedly arranged on the inner bottom of the cabin 5, and the driven shaft 14 is rotationally connected with the fixed plate 15.

[0027] The axial flow fan 36 is fixedly arranged on the top of the cabin 5.

[0028] The working principle of the device is as follows: The wind of the external environment blows the blades 3 to rotate, and the generator 7 generates electricity under the drive of the main shaft 9, the gear box 2 and the connecting shaft 10, and the generator 7 generates heat, the connecting shaft 10 drives the driven shaft 14 and the impeller 29 to rotate, and then the cooling liquid circulates and flows, the cooling liquid is pressurized and discharged from the pump shell 13, enters the jacket 6 through the connecting pipe 16 to absorb the heat generated by the generator 7, and then enters the heat dissipation pipe 44 through the liquid outlet pipe 17 to be cooled, the cooled cooling liquid enters the pump shell 13 through the liquid inlet pipe 18 and is pressurized and discharged again by the impeller 29, and the cooling liquid circulates and flows to cool the generator 7; the connecting shaft 10 drives the rotating shaft 21, the lifting plate 25 and the counterweight ball 22 to rotate when rotating, when the wind speed of the external environment increases, the rotating speed of the blades 3 increases, the power generation of the generator 7 increases, the heat generated increases, the rotating speed of the connecting shaft 10 increases with the increase of the rotating speed of the blades 3, the rotating speed of the counterweight ball 22 increases, the required centripetal force of the counterweight ball 22 increases, the height of the counterweight ball 22 increases, and then the lifting plate 25 and the sliding rod 27 are driven to move downward, thereby driving the rack 26 to slide downward, under the drive of the gear 32, the outer fixed pipe 39 drives the rotating plate 34 to rotate, the angle between the rotating plate 34 and the horizontal plane increases, the axial flow fan 36 continuously provides transverse wind flow, the total projection area of the heat dissipation pipe 44 and the heat dissipation fin 43 in the direction of the wind flow increases, the contact area of the heat dissipation pipe 44 and the heat dissipation fin 43 with the wind flow increases, in the process of increasing the rotating speed of the blades 3, the rotating speed of the driven shaft 14 increases with the increase of the rotating speed of the connecting shaft 10, the rotating speed of the impeller 29 increases, and then the circulation speed of the cooling liquid is accelerated, the total projection area of the heat dissipation pipe 44 and the heat dissipation fin 43 in the direction of the wind flow increases and the circulation speed of the cooling liquid is accelerated, which together improves the heat dissipation speed of the generator 7, on the contrary, when the wind speed of the external environment decreases, the total projection area of the heat dissipation pipe 44 and the heat dissipation fin 43 in the direction of the wind flow decreases and the circulation speed of the cooling liquid slows down, which together reduces the heat dissipation speed of the generator 7, the heat dissipation speed of the wind driven generator 7 can be dynamically adjusted according to the change of the external wind speed, when the wind speed increases, the effective heat dissipation area of the heat dissipation pipe 44 and the heat dissipation fin 43 increases, and at the same time the circulation speed of the cooling liquid is accelerated, and the heat dissipation speed increases; on the contrary, when the wind speed decreases, the heat dissipation speed decreases, through this dynamic adjustment mechanism which responds to the wind condition in real time, the problems of overheating of the generator 7 winding and thermal damage of the insulation caused by insufficient heat dissipation under high wind speed working condition are effectively avoided, and the phenomenon of too low working temperature of the generator 7 caused by excessive cooling during low wind speed period is prevented, so as to ensure that the power generation efficiency is always in the optimal interval, and the service life of the equipment is greatly prolonged; When the rotating speed of the blade 3 is raised to a certain value, the rotating plate 34 is rotated to the vertical state and is limited by the limiting plate 37, at this time, the effective heat dissipation area of the heat dissipation pipe 44 and the heat dissipation fin 43 is the largest, the heat dissipation speed of the generator 7 is the fastest, when the rotating speed of the blade 3 is raised again, the rotating plate 34 does not rotate any more, which ensures that the heat dissipation pipe 44 and the heat dissipation fin 43 dissipate heat to the generator 7 at the best heat dissipation speed, but the rotating speed of the impeller 29 will be raised with the rising of the rotating speed of the connecting shaft 10, the circulating speed of the cooling liquid is further raised to improve the heat dissipation speed of the generator 7, after the rotating plate 34 is limited by the limiting plate 37, the height of the counterweight ball 22 does not change any more, when the external environment wind speed is extremely low, the blade 3 stops rotating, the counterweight ball 22 contacts the supporting cylinder 28 under the action of the gravity, the supporting cylinder 28 provides support for the counterweight ball 22, at this time, the rotating plate 34 is in the horizontal state; The heat dissipation pipe 44 and the connecting groove 45 jointly form an S-shaped water path, which increases the cooling path of the cooling liquid and ensures the cooling effect of the cooling liquid.

[0029] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the specification of the present application.

Claims

1. A ventilation and heat dissipation system for a wind turbine generator, characterized in that: The engine room includes a nacelle (5), inside which are a gearbox (2) and a generator (7). A hub (1) is rotatably mounted at the end of the engine room (5). Several blades (3) are fixedly installed on the outer wall of the hub (1). The input end of the gearbox (2) is connected to the hub (1) via a main shaft (9). The input end of the generator (7) is connected to the output end of the gearbox (2) via a connecting shaft (10). A jacket (6) is fitted on the outer wall of the generator (7). A pumping assembly (8) and a heat dissipation assembly (4) are respectively provided inside and on the top of the engine room (5). The pumping assembly (8), the heat dissipation assembly (4), and the jacket (6) are connected to form a circulation loop. The heat dissipation assembly (4) includes a supporting U-shaped plate (35) and a rotating plate (34). The top of the rotating plate (34) is provided with a ventilation groove (38). The rotating plate (34) is provided with an inlet groove (42), an outlet groove (46) and several connecting grooves (45) inside. Several heat dissipation pipes (44) are provided in the ventilation groove (38). Several heat dissipation fins (43) are provided on the outer wall of the heat dissipation pipes (44). Adjacent heat dissipation pipes (44) are connected through the connecting grooves (45) to form an S-shaped water channel. The inlet groove (42) and the outlet groove (46) are connected to the two ends of the S-shaped water channel. The opposite ends of the rotating plate (34) are fixedly provided with an external fixing pipe (39). The external fixing pipe (39) is rotatably connected to the supporting U-shaped plate (35). The outlet groove (46) and the inlet groove (42) are connected to the pumping assembly (8) and the jacket (6). The cabin (5) is equipped with a transmission assembly (11). The connecting shaft (10) drives one of the external fixed pipes (39) through the transmission assembly (11). The connecting shaft (10) also drives the pumping assembly (8). The faster the connecting shaft (10) rotates, the larger the angle between the rotating plate (34) and the horizontal plane, the faster the coolant circulation flow and the faster the heat dissipation.

2. The wind turbine ventilation and heat dissipation system according to claim 1, characterized in that: The transmission assembly (11) includes a supporting L-shaped plate (12), a connecting shaft (10) passing through the supporting L-shaped plate (12) and rotatably connected to it, a rotating shaft (21) rotatably connected to the top of the supporting L-shaped plate (12), a lifting plate (25) above the rotating shaft (21), a sliding rod (27) fixedly connected to the bottom of the lifting plate (25), the bottom end of the sliding rod (27) extending into the rotating shaft (21) and slidably connected to it, connecting rods (24) hinged to opposite ends of the lifting plate (25), a counterweight ball (22) fixedly connected to one end of the connecting rod (24), and the connecting rod (24) is connected to the counterweight ball (22). The outer wall of the rod (24) is hinged with several connecting plates (23). One end of the connecting plate (23) is hinged to the rotating shaft (21). The outer wall of the connecting shaft (10) is fixedly fitted with a driving bevel gear (19). The lower outer wall of the rotating shaft (21) is fixedly fitted with a driven bevel gear (20) that meshes with the driving bevel gear (19). One of the outer fixed tubes (39) is fixedly fitted with a gear (32). The inner wall of the supporting U-shaped plate (35) is slidably provided with a rack (26) that meshes with the gear (32). The bottom end of the rack (26) passes downward through the cabin (5) and is rotatably connected to the lifting plate (25).

3. The wind turbine ventilation and heat dissipation system according to claim 2, characterized in that: The top of the L-shaped support plate (12) is fixedly provided with a support cylinder (28), the outer wall of the support cylinder (28) is an arc structure, the rotating shaft (21) is located inside the support cylinder (28), and the top of the support U-shaped plate (35) is fixedly connected with a limiting plate (37).

4. The wind turbine ventilation and heat dissipation system according to claim 2, characterized in that: The inner wall of the supporting U-shaped plate (35) is fixedly provided with a support strip (33), and the rack (26) is slidably connected to the support strip (33).

5. A wind turbine ventilation and heat dissipation system according to claim 1, characterized in that: The pumping assembly (8) includes a pump housing (13), an impeller (29) is rotatably mounted inside the pump housing (13), the inlet of the pump housing (13) is connected to the outlet tank (46) through the inlet pipe (18), and the outlet of the pump housing (13) is connected to the jacket (6) through the connecting pipe (16). A driven shaft (14) is fixedly connected to the end of the impeller (29), and one end of the driven shaft (14) extends through the pump housing (13) to the outside. Both the connecting shaft (10) and the outer wall of the driven shaft (14) are fixedly fitted with transmission wheels (30), and the two transmission wheels (30) are connected by a transmission belt (31).

6. A wind turbine ventilation and heat dissipation system according to claim 5, characterized in that: The outer fixed tube (39) is provided with an inner fixed tube (40) that is fixedly connected to the rotating plate (34). The two inner fixed tubes (40) are connected to the liquid outlet tank (46) and the liquid inlet tank (42) respectively. The opposite ends of the supporting U-shaped plate (35) are provided with a through hole (41). The inner fixed tube (40) is connected to the through hole (41) and is rotatably and sealed to the supporting U-shaped plate (35). The liquid inlet tube (18) is connected to one of the through holes (41). The other through hole (41) is connected to the jacket (6) through the liquid outlet tube (17).

7. A wind turbine ventilation and heat dissipation system according to claim 5, characterized in that: A fixed plate (15) is fixedly installed at the bottom of the cabin (5), and the driven shaft (14) is rotatably connected to the fixed plate (15).

8. A wind turbine ventilation and heat dissipation system according to claim 1, characterized in that: An axial flow fan (36) is fixedly installed on the top of the nacelle (5).

Images