CN115234454B

CN115234454B - Efficient heat dissipation device of wind driven generator

Info

Publication number: CN115234454B
Application number: CN202211161218.6A
Authority: CN
Inventors: 郭东杰; 申戬林; 吕文彦; 贾宇飞; 侯勇; 王泽�; 田志强; 王小龙; 张琪烜; 王晓丽
Original assignee: Fanshi Yunwuyu Wind Power Co Ltd Of State Power Investment Group
Current assignee: Fanshi Yunwuyu Wind Power Co Ltd Of State Power Investment Group
Priority date: 2022-09-23
Filing date: 2022-09-23
Publication date: 2022-11-25
Anticipated expiration: 2042-09-23
Also published as: CN115234454A

Abstract

The invention relates to the technical field of cooling and heat dissipation of wind driven generators, in particular to a high-efficiency heat dissipation device of a wind driven generator. The invention provides a high-efficiency heat dissipation device of a wind driven generator, which comprises an air inlet frame, a circulating cooling mechanism, a heat dissipation mechanism and the like, wherein the air inlet frame is connected to one side of a cabin close to a ventilation window, the circulating cooling mechanism for cooling and dissipating heat of the generator is arranged in the cabin, the heat dissipation mechanism is arranged in the cabin and used for discharging hot air in the cabin outwards to cool and dissipate heat of the generator. The fan blades can be driven to rotate through the rotation of the main shaft, the air flow in the cabin is accelerated, the heat dissipation and cooling of the generator are realized, meanwhile, the main shaft can also drive the circulating pump to work, so that cooling liquid circularly flows in the cooling frame, the heat dissipated by the generator is quickly taken away, the generator is further subjected to heat dissipation and cooling, and the purpose of efficient heat dissipation is achieved.

Description

Efficient heat dissipation device of wind driven generator

Technical Field

The invention relates to the technical field of cooling and heat dissipation of wind driven generators, in particular to a high-efficiency heat dissipation device of a wind driven generator.

Background

The wind driven generator is an electric device which converts wind energy into mechanical power, the mechanical power drives the rotor to rotate and finally outputs alternating current, when the wind driven generator is in a working state, a large amount of heat can be generated, and if the heat is not timely discharged from the generator shell, the service life of the wind driven generator can be influenced, so that the heat is required to be dissipated, and the service life of the wind driven generator is ensured.

Patent publication No. CN112922796B discloses a cooling device for a wind generating set, which comprises a shell and an air inlet box communicated with the shell through a pipeline; an air box is arranged in the shell, an air inlet and an air outlet are arranged on the air box, the air outlet of the air box is connected with an air supply cooling pipeline which can penetrate through the shell, and the air supply cooling pipeline is communicated with the inside of an engine room of an externally connected wind generating set; an air return pipe is fixed at the top of the shell through a mounting rod, and an air inlet of the air return pipe is connected with an air inlet hopper; the air inlet box is provided with an air inlet and an air outlet, the air outlet of the air inlet box is connected with a main air inlet pipe, the other end of the main air inlet pipe can penetrate through the shell and is connected with an air inlet of the air box, and the air inlet of the air inlet box is arranged opposite to an air outlet of the air return pipe; the inside of air inlet box installs first filter screen, and first filter screen is located between the air intake and the air outlet of air inlet box, and the dust collecting tube is installed to the bottom of air inlet box, and the bottom of dust collecting tube is equipped with the visor.

Above-mentioned patent is through forming the inside and outside air cycle in cabin, dispels the heat to wind generating set's inside through the air current, but, the temperature of outside air receives environmental impact, and when outside temperature was higher, above-mentioned patent was less than the inside radiating effect that carries on of wind generating set.

In summary, there is a need for a high-efficiency heat dissipation device for wind turbine generator, which is used to solve the above problems.

Disclosure of Invention

The invention aims to overcome the defects that the existing cooling device generally dissipates heat to the interior of a wind generating set through air flow, but the temperature of outside air is influenced by the environment, and the heat dissipation effect is poor when the outside temperature is higher.

The invention is realized by the following technical approaches:

the utility model provides a high-efficient heat abstractor of aerogenerator, including the ventilation window, the ventilation window that is used for the circulation of air is installed to one side in cabin, still including the frame that advances, circulative cooling mechanism, open and shut mechanism and heat dissipation mechanism, one side that the cabin is close to the ventilation window is connected with the frame that advances, be equipped with in the cabin and be used for cooling radiating circulative cooling mechanism to the generator, be equipped with the mechanism that opens and shuts on the frame that advances, the mechanism that opens and shuts is arranged in leading-in frame that advances of wind, supplementary circulative cooling mechanism cools off the heat dissipation to the generator, be equipped with heat dissipation mechanism in the cabin, heat dissipation mechanism is used for past discharging the steam in the cabin, cool off the heat dissipation to the generator.

Further, the circulating cooling mechanism is including the circulating pump, drive assembly, the feed liquor pipe, the back flow, the drain pipe, the cooling frame, fin and circulating pipe, the one side that the cabin is close to the main shaft is connected with the circulating pump, carry out the transmission through drive assembly between the input shaft of circulating pump and the main shaft, be connected with feed liquor pipe and back flow on the circulating pump, be connected with the cooling frame on the generator, the one end that the circulating pump was kept away from to the feed liquor pipe is connected with the cooling frame, the inside of cooling frame is evenly spaced there is the round hole, the cooling liquid can cool down the heat dissipation to the generator when flowing in the round hole, the one side that the feed liquor pipe was kept away from to the cooling frame is connected with the drain pipe, the in-frame cooling fin that is connected with the circulating pipe on the fin, the one end that the cooling frame was kept away from to the drain pipe is connected with the one end of circulating pipe, the one end that the circulating pump was kept away from to the back flow is connected with the other end of circulating pipe.

Further, the mechanism that opens and shuts is including open-close plate, frid, sleeve pipe and crane, and the rotation type is connected with the open-close plate on the air inlet frame, and the open-close plate rotates to open and to lead to the air inlet frame with the wind, and one side that the open-close plate is close to the blade is connected with the frid, is connected with a plurality of sleeve pipes on the cabin, and slidingtype connection has the crane between a plurality of sleeve pipes, and the crane is connected with the frid is movable.

Further, the heat dissipation mechanism comprises a mounting frame, fan blades and a gear box, one side, close to the main shaft, of the air inlet frame is connected with the mounting frame, the gear box is installed in the mounting frame, the fan blades are connected to multiple output shafts of the gear box, the fan blades can discharge hot air in the engine room through rotation, and an input shaft of the gear box and the main shaft are also driven through a transmission assembly.

The novel split plate is characterized by further comprising a protection mechanism used for protecting the air inlet frame, wherein the protection mechanism comprises a protection plate and a blocking net, the bottom of the split plate is connected with the two protection plates, the protection plates are located inside the air inlet frame, and the blocking net is connected between the side, close to the blades, of the protection plates.

Further, still including the mechanism that slowly falls that is used for slowing down the opening-closing plate closing speed, slowly fall the mechanism including the oil storage tank, go out oil pipe, the check valve, return oil pipe and restriction valve, the cabin is close to sheathed tube one side and is connected with a plurality of oil storage tanks, oil storage tank and sleeve pipe one-to-one, all be connected with out oil pipe between oil storage tank bottom and the close sleeve pipe bottom, all install the check valve on the play oil pipe, all be connected with back oil pipe between oil storage tank and the close sleeve pipe, all install the restriction valve on the return oil pipe, the restriction valve is the one-way circulation.

Furthermore, the height of the liquid inlet pipe far away from one end of the circulating pump is higher than that of the liquid outlet pipe close to one end of the cooling frame.

Furthermore, the circulating pipes are evenly distributed on the radiating fins in a bent shape.

Compared with the prior art, the invention has the following advantages:

1. the fan blades can be driven to rotate through the rotation of the main shaft, the air flow in the cabin is accelerated, the heat dissipation and cooling of the generator are realized, meanwhile, the main shaft can also drive the circulating pump to work, so that cooling liquid circularly flows in the cooling frame, the heat dissipated by the generator is quickly taken away, the generator is further subjected to heat dissipation and cooling, and the purpose of efficient heat dissipation is achieved.

2. The cooling fin can absorb heat in the cooling liquid, so that the cooling liquid can be recycled, meanwhile, air can be introduced into the air inlet frame through opening of the opening plate, the cooling fin is cooled through air flow, and the opening angle of the opening plate is larger along with increase of wind power, so that the cooling fin can be better cooled, and the influence of external temperature on cooling of the cooling fin is reduced.

3. When the lifting frame moves downwards, the hydraulic oil in the extrusion sleeve pipe flows back to the oil storage tank, and the backflow speed of the hydraulic oil is limited under the action of the flow limiting valve, so that the descending speed of the lifting frame can be reduced, the opening and closing plate is slowly closed, and the residual heat on the radiating fins can be taken away through the air flow in the air inlet frame.

4. After the plywood is opened, the protective plates and the blocking nets can play a protective role, so that dust, sundries and birds are prevented from entering the air inlet frame.

Drawings

Fig. 1 is a schematic perspective view of a wind turbine.

Fig. 2 is a schematic view of the installation of the present invention.

Fig. 3 is a schematic perspective view of the circulation cooling mechanism of the present invention.

FIG. 4 is a schematic perspective view of the liquid outlet tube and the cooling frame of the present invention.

FIG. 5 is a schematic cross-sectional view of a cooling frame according to the present invention.

FIG. 6 is a schematic view showing the installation of the heat radiating fin and the circulation tube of the present invention.

Fig. 7 is a perspective view illustrating the structure of the heat radiating fin and the circulation tube according to the present invention.

Fig. 8 is a schematic perspective view of the opening and closing mechanism of the present invention.

Fig. 9 is a schematic perspective view of the cannula and the crane of the present invention.

Fig. 10 is a schematic perspective view of the mounting frame and the fan blade of the present invention.

Fig. 11 is a schematic perspective view of the heat dissipation mechanism of the present invention.

Fig. 12 is a perspective view of the protection mechanism of the present invention.

Fig. 13 is a schematic perspective view of a descent control mechanism according to the present invention.

In the drawings above: 1: tower, 11: nacelle, 12: main shaft, 13: blade, 14: a generator, 2: louver, 3: air intake frame, 4: circulation cooling mechanism, 41: circulation pump, 42: transmission assembly, 43: return pipe, 44: liquid inlet pipe, 45: liquid outlet pipe, 46: heat sink, 47: circulation pipe, 48: cooling frame, 49: round hole, 5: opening and closing mechanism, 51: opening plate, 52: groove plate, 53: sleeve, 54: crane, 6: heat dissipation mechanism, 61: mounting frame, 62: fan blade, 63: gearbox, 7: guard mechanism, 71: guard plate, 72: barrier net, 8: slow descending mechanism, 81: oil tank, 82: oil outlet pipe, 83: check valve, 84: oil return pipe, 85: a flow-limiting valve.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings. It is only noted that the invention may be embodied or carried out in any orientation of its own, including up, down, left, right, front, rear, inner, outer, etc., with reference to the accompanying drawings, which are not intended to be limiting of the invention, but rather, with reference to the component parts herein being numbered per se, for example: first, second, etc. are used solely to distinguish one from another as to objects described herein, and do not have any sequential or technical meaning. The application states that: the connection and coupling, unless otherwise stated, include both direct and indirect connections (couplings).

Example 1

A high-efficiency heat dissipation device of a wind driven generator refers to fig. 1 and 2 and comprises a ventilating window 2, an air inlet frame 3, a circulating cooling mechanism 4, an opening and closing mechanism 5 and a heat dissipation mechanism 6, wherein a cabin 11 is rotatably installed on a tower 1, a main shaft 12 is rotatably installed on the cabin 11, blades 13 are installed on the main shaft 12, a generator 14 used for generating electricity is installed in the cabin 11, the ventilating window 2 used for air circulation is installed on the left side of the cabin 11, as shown in fig. 2, the air inlet frame 3 is connected to the cabin 11, the circulating cooling mechanism 4 is arranged in the cabin 11, the opening and closing mechanism 5 is arranged on the air inlet frame 3, and the heat dissipation mechanism 6 is arranged in the cabin 11.

Referring to fig. 2 to 7, the circulating cooling mechanism 4 includes a circulating pump 41, a transmission assembly 42, a liquid inlet pipe 44, a return pipe 43, a liquid outlet pipe 45, a cooling frame 48, a heat sink 46, and a circulating pipe 47, the circulating pump 41 is bolted to one side of the nacelle 11 close to the main shaft 12, the transmission assembly 42 transmits the power between an input shaft of the circulating pump 41 and the main shaft 12, the liquid inlet pipe 44 and the return pipe 43 are connected to the circulating pump 41, the cooling frame 48 is connected to the generator 14, as shown in fig. 4, one end of the liquid inlet pipe 44 away from the circulating pump 41 is connected to the cooling frame 48, and one side of the cooling frame 48 away from the liquid inlet pipe 44 is connected to the liquid outlet pipe 45, as shown in fig. 5, round holes 49 are uniformly spaced inside the cooling frame 48, and the cooling liquid can circulate in the round holes 49, so as to rapidly take away the heat from the generator 14 for the purpose of cooling and dissipating heat, the heat is connected to the air inlet frame 3 is connected to the heat sink 46, as shown in fig. 6, the heat sink 46 is connected to the circulating pipe 47, as shown in fig. 7, the heat sink 47 is uniformly distributed on the heat sink 46 in a bent shape, as shown in fig. 3, one end of the return pipe 45 away from the circulating pipe 45, one end of the circulating pipe 45 away from the circulating pump 41 is connected to the circulating pipe 41, and the circulating pipe is higher than the circulating pump 41, the circulating pipe 47, and the circulating pipe 41 is higher than the circulating pipe 48.

Referring to fig. 2, 8 and 9, the opening and closing mechanism 5 includes an opening plate 51, a groove plate 52, a sleeve pipe 53 and a lifting frame 54, the opening plate 51 is rotatably connected to the air intake frame 3, the opening plate 51 is upwardly rotated to be opened to guide the air into the air intake frame 3, the groove plate 52 is welded to the right side of the opening plate 51, the plurality of sleeve pipes 53 are connected to the nacelle 11, as shown in fig. 9, the lifting frame 54 is slidably connected between the plurality of sleeve pipes 53, and the lifting frame 54 is movably connected to the groove plate 52.

Referring to fig. 2, 10 and 11, the heat dissipation mechanism 6 includes a mounting frame 61, fan blades 62 and a gear box 63, the mounting frame 61 is connected to one side of the air intake frame 3 close to the main shaft 12, as shown in fig. 11, the gear box 63 is installed in the mounting frame 61, the fan blades 62 are connected to multiple output shafts of the gear box 63, the fan blades 62 rotate to accelerate the air flow inside the nacelle 11, heat dissipation and cooling are performed on the generator 14, and the input shaft of the gear box 63 is also in transmission with the main shaft 12 through the transmission assembly 42.

Initially, the return pipe 43, the liquid inlet pipe 44, the liquid outlet pipe 45 and the circulating pipe 47 all have cooling liquid therein, when the blades 13 rotate, the main shaft 12 is driven to rotate, so that the generator 14 starts to work to generate electricity, meanwhile, the main shaft 12 can drive the input shaft of the gear box 63 to rotate through the transmission assembly 42, so that the output shaft of the gear box 63 drives the fan blades 62 to rotate, thereby accelerating the air flow inside the cabin 11, the ventilation window 2 is used for ventilation, the hot air inside the cabin 11 can be discharged, the generator 14 is cooled by heat dissipation, the main shaft 12 can also drive the input shaft of the circulating pump 41 to rotate through the transmission assembly 42, so that the circulating pump 41 works, thereby the cooling liquid flows in the return pipe 43, the liquid inlet pipe 44, the liquid outlet pipe 45, the cooling frame 48 and the circulating pipe 47 in a circulating manner, because the height of the liquid inlet pipe 44 far from the end of the circulating pump 41 is higher than the height of the liquid outlet pipe 45 near the cooling frame 48, therefore, the cooling liquid in the cooling frame 48 can flow from top to bottom and flow from right to left in the circular hole 49, so that the heat emitted by the generator 14 can be taken away quickly, the generator 14 can be further cooled, and the purpose of efficient heat dissipation is achieved, when the cooling liquid flows into the circulating pipe 47, the heat radiating fins 46 can absorb the heat in the cooling liquid, so that the cooling liquid is cooled down for recycling, meanwhile, the section of the upper part of the lifting frame 54 is manufactured by imitating the wing and Bernoulli principle of an airplane, therefore, under the action of wind force, the lifting frame 54 can move upwards, the larger the wind force is, the larger the distance of the upward movement of the lifting frame 54 is, the upward movement of the lifting frame 54 can drive the slotted plate 52 to move upwards, the opening plate 51 can rotate upwards to open, the opening plate 51 can guide the wind into the wind inlet frame 3, so that the heat radiating fins 46 can be cooled by utilizing the air flow, the heat on the radiating fins 46 is taken away, so that the radiating fins 46 can better radiate and cool the cooling liquid in the circulating pipe 47, when no wind exists, the blades 13 stop rotating, the generator 14 stops working, the lifting frame 54 can move downwards to reset under the action of gravity, the groove plate 52 is driven to move downwards to reset, and the opening and closing plate 51 moves downwards to close.

Example 2

On the basis of the embodiment 1, referring to fig. 8 and 12, the air intake structure further comprises a protection mechanism 7, wherein the protection mechanism 7 comprises two protection plates 71 and a barrier net 72, the two protection plates 71 are welded at the bottom of the opening plate 51, the protection plates 71 are located inside the air intake frame 3, the barrier net 72 is connected between the right sides of the protection plates 71, and the protection plates 71 and the barrier net 72 can prevent dust, sundries and birds from entering the air intake frame 3.

When the opening plate 51 is rotated upwards and opened, the protection plate 71 and the blocking net 72 can be driven to rotate upwards, the protection plate 71 and the blocking net 72 can play a protection role, and dust, sundries and birds are prevented from entering the air inlet frame 3.

Referring to fig. 2, 8 and 13, the air conditioner further comprises a slow descending mechanism 8, the slow descending mechanism 8 comprises an oil storage tank 81, an oil outlet pipe 82, a one-way valve 83, an oil return pipe 84 and a flow limiting valve 85, as shown in fig. 8, one side of the cabin 11 close to the casing 53 is connected with the oil storage tanks 81, the oil storage tanks 81 correspond to the casing 53 one by one, as shown in fig. 13, the oil outlet pipe 82 is connected between the bottom of the oil storage tank 81 and the bottom of the casing 53 close to the oil outlet pipe 82, the one-way valve 83 is mounted on the oil outlet pipe 82, the oil return pipe 84 is connected between the oil storage tank 81 and the casing 53 close to the oil return pipe, the flow limiting valve 85 is mounted on the oil return pipe 84, the flow limiting valve 85 is in one-way circulation, the flow limiting valve 85 can slow down the speed of the hydraulic oil return, the opening plate 51 is slowly closed, and the residual heat on the cooling fins 46 can be taken away through the air flow in the air inlet frame 3.

Initially, hydraulic oil is equipped with in the oil storage tank 81, when crane 54 up-moved, utilize the piston principle, can extract the hydraulic oil in the oil storage tank 81, make the hydraulic oil in the oil storage tank 81 pass through inside the oil outlet pipe 82 entering sleeve pipe 53, when crane 54 down-moved, can extrude the inside hydraulic oil of sleeve pipe 53, under the effect of check valve 83, the inside hydraulic oil of sleeve pipe 53 can only flow back to in the oil storage tank 81 through returning oil pipe 84, under the effect of restriction valve 85, the speed of hydraulic oil backward flow is limited, consequently, can slow down the speed that crane 54 descends, make slowly closing of open-close plate 51, waste heat on can taking away fin 46 is flowed through the air in the frame 3 that admits air.

The above-mentioned embodiments are only preferred embodiments of the present invention, and should not be used to limit the scope of the present invention, so that all equivalent changes made by the contents of the claims of the present invention should be included in the scope of the claims of the present invention.

Claims

1. The high-efficiency heat dissipation device of the wind driven generator comprises a ventilation window (2), wherein the ventilation window (2) used for air circulation is installed on one side of a cabin (11), and the high-efficiency heat dissipation device is characterized by further comprising an air inlet frame (3), a circulating cooling mechanism (4), an opening and closing mechanism (5) and a heat dissipation mechanism (6), one side, close to the ventilation window (2), of the cabin (11) is connected with the air inlet frame (3), the circulating cooling mechanism (4) used for cooling and dissipating heat of a generator (14) is arranged in the cabin (11), the opening and closing mechanism (5) is arranged on the air inlet frame (3), the opening and closing mechanism (5) is used for guiding air into the air inlet frame (3), the auxiliary circulating cooling mechanism (4) is used for cooling and dissipating heat of the generator (14), the heat dissipation mechanism (6) is arranged in the cabin (11), and the heat dissipation mechanism (6) is used for discharging hot air in the cabin (11) outwards to cool and dissipate heat of the generator (14); the circulating cooling mechanism (4) comprises a circulating pump (41), a transmission component (42), a liquid inlet pipe (44), a return pipe (43), a liquid outlet pipe (45), a cooling frame (48), a radiating fin (46) and a circulating pipe (47), one side of the cabin (11) close to the main shaft (12) is connected with a circulating pump (41), an input shaft of the circulating pump (41) and the main shaft (12) are driven by a driving assembly (42), the circulating pump (41) is connected with a liquid inlet pipe (44) and a return pipe (43), the generator (14) is connected with a cooling frame (48), one end of the liquid inlet pipe (44) far away from the circulating pump (41) is connected with the cooling frame (48), round holes (49) are uniformly formed in the cooling frame (48) at intervals, cooling liquid can cool and dissipate heat of the generator (14) when flowing in the round holes (49), one side of the cooling frame (48) far away from the liquid inlet pipe (44) is connected with a liquid outlet pipe (45), cooling fins (46) are connected in the air inlet frame (3), the cooling fins (46) are connected with the return pipe (47), one end of the liquid outlet pipe (45) far away from the cooling frame (48) is connected with one end of the return pipe (47), and one end of the return pipe (43) far away from the circulating pump (41) is connected with the other end of the return pipe (47); opening and shutting mechanism (5) are including open-close plate (51), frid (52), sleeve pipe (53) and crane (54), the last rotation type of air inlet frame (3) is connected with open-close plate (51), open-close plate (51) rotate to open and to lead into air inlet frame (3) with the wind, one side that open-close plate (51) is close to blade (13) is connected with frid (52), be connected with a plurality of sleeve pipes (53) on cabin (11), sliding connection has crane (54) between a plurality of sleeve pipes (53), crane (54) are connected with frid (52) movable, the cross-section on crane (54) upper portion is the wing and the preparation of bernoulli's principle of imitative aircraft.

2. The efficient heat dissipation device of the wind driven generator as claimed in claim 1, wherein the heat dissipation mechanism (6) comprises a mounting frame (61), fan blades (62) and a gear box (63), the mounting frame (61) is connected to one side of the air inlet frame (3) close to the main shaft (12), the gear box (63) is installed in the mounting frame (61), the fan blades (62) are connected to multiple output shafts of the gear box (63), the fan blades (62) can discharge hot air in the engine room (11) by rotation, and the input shaft of the gear box (63) is also in transmission with the main shaft (12) through the transmission assembly (42).

3. The efficient heat dissipation device of the wind driven generator as defined in claim 2, further comprising a protection mechanism (7) for protecting the air intake frame (3), wherein the protection mechanism (7) comprises protection plates (71) and a barrier net (72), the bottom of the opening plate (51) is connected with the two protection plates (71), the protection plates (71) are both located inside the air intake frame (3), and the barrier net (72) is connected between the sides of the protection plates (71) close to the blades (13).

4. The efficient heat dissipation device of the wind driven generator as claimed in claim 3, further comprising a slow descending mechanism (8) for slowing down the closing speed of the opening and closing plate (51), wherein the slow descending mechanism (8) comprises oil storage tanks (81), oil outlet pipes (82), check valves (83), oil return pipes (84) and flow limiting valves (85), one side of the engine room (11) close to the casing pipes (53) is connected with a plurality of oil storage tanks (81), the oil storage tanks (81) correspond to the casing pipes (53) one to one, the oil outlet pipes (82) are connected between the bottoms of the oil storage tanks (81) and the bottoms of the close casing pipes (53), the check valves (83) are installed on the oil outlet pipes (82), the oil return pipes (84) are connected between the oil storage tanks (81) and the close casing pipes (53), the flow limiting valves (85) are installed on the oil return pipes (84), and the flow limiting valves (85) are in one-way circulation.

5. The efficient heat dissipation device of the wind driven generator as claimed in claim 1, wherein the liquid inlet pipe (44) is higher at the end away from the circulating pump (41) than at the end of the liquid outlet pipe (45) close to the cooling frame (48).

6. The efficient heat sink for wind power generator as claimed in claim 1, wherein the circulation tubes (47) are bent and uniformly distributed on the heat dissipation fins (46).