Cooling method for wind driven generator

Abstract

The invention relates to the technical field of wind power generation, in particular to a wind driven generator cooling method which comprises the following steps: step (1), mounting a cooling device; the cooling device is arranged in the cabin and can perform liquid cooling on the generator, so that the generator is rapidly cooled; (2) arranging an air exhaust heat dissipation pipe; a plurality of air exhaust and heat dissipation pipes are arranged on the periphery in the cabin, and the air exhaust and heat dissipation pipes conduct air exhaust and heat dissipation towards the generator; (3) arranging a fan; a plurality of fans are arranged in the cabin and blow towards the generator; (4) installing a movable sponge; a plurality of sponges are arranged on the surface of the generator, and the sponges can move in the axial direction of the generator; (5) arranging a dustproof filter screen; and the dustproof filter screen can prevent dust and other foreign matters from entering the cabin. The problem that an existing cooling method cannot rapidly cool a wind driven generator in the process that the temperature of the generator rises rapidly is solved.

Description

Technical Field

[0001] The invention relates to the technical field of wind power generation, and in particular to a method for cooling a wind power generator. Background Art

[0002] During the operation of a wind turbine, the internal generator will generate a lot of heat, which will cause the temperature in the cabin to be high, and it is necessary to dissipate heat in time. If the heat accumulates excessively, it will seriously affect the service life of electrical components such as the generator. The traditional cooling method is to fix the temperature detector and the cooling device somewhere in the cabin. The temperature in the cabin is first detected by the temperature detector. When the temperature in the cabin rises to a predetermined value, the temperature detector will transmit a signal to the signal device on the cooling device. After receiving the signal, the signal device will start the fan on the cooling device; through the rotation of the fan, the temperature in the cabin can be quickly cooled. However, this method can only meet the requirements of blowing and cooling one side of the generator, and cannot meet the requirements of blowing and cooling the generator in all directions, resulting in poor blowing and cooling effect, which is not conducive to practical application.

[0003] In order to solve the above problems, a new cooling method is proposed, S1, a number of heat dissipation holes are opened on the inner wall of the cabin; S2, a number of fans are arranged in the cabin, and the fans are evenly distributed around the generator; S2, the power supply and the fans are connected by wires to form a parallel circuit; S3, a signal receiver and a controller are arranged on the power supply; S4, a temperature sensor is arranged in the cabin, and the temperature sensor is used to transmit the temperature rise signal to the signal receiver; S5, the controller starts the power supply under the action of the signal receiver, so that the fans dissipate heat from the generator at different positions. This method realizes the cooling of the generator by blowing air in multiple directions, enhances the heat dissipation and cooling effect of the generator, improves the efficiency of blowing air and cooling, and prolongs the service life of the generator.

[0004] The above method has the following problems during actual use: whether it is to use a fan to blow air to cool the generator or to use multiple fans to blow air around the generator at different positions to cool it, both are air cooling methods. When the temperature of the generator rises rapidly, in order to achieve faster cooling and heat dissipation, liquid cooling can be used. By directly applying the liquid to the surface of the generator, more efficient heat exchange can be achieved in a short time, so that the temperature of the generator surface can be rapidly reduced, thereby ensuring that the internal electronic components of the generator will not be damaged due to the rapid increase in temperature, thereby ensuring that the generator can generate electricity stably for a long time. Summary of the invention

[0005] The present invention provides a method for cooling a wind turbine generator, so as to solve the problem that the existing cooling method cannot quickly cool the wind turbine generator when the temperature of the generator rises rapidly.

[0006] To achieve the above object, the present invention adopts the following technical solution: A method for cooling a wind turbine generator, comprising the following steps:

[0007] Step (1): installing a cooling device; the cooling device is arranged in the engine room, and when the heat dissipation holes are dissipating heat to the generator, the cooling device can perform liquid cooling on the generator, so that the temperature of the generator surface can be quickly reduced;

[0008] Step (2): arranging an exhaust heat dissipation pipe; arranging a plurality of exhaust heat dissipation pipes around the cabin, and the exhaust heat dissipation pipes are directed toward the generator to extract and dissipate air;

[0009] Step (3): Arrange fans; a plurality of fans are arranged at equal intervals in the cabin, and the fans blow air toward the generator to cool it;

[0010] Step (4): arranging a movable sponge; arranging a plurality of sponges at equal intervals on the surface of the generator, and the sponges can move along the axial direction of the generator;

[0011] Step (5): Install a dust filter; install a dust filter on the heat dissipation hole, the dust filter can prevent dust and other foreign matter from entering the cabin.

[0012] The principles and advantages of this solution are:

[0013] 1. When the temperature of the generator rises too quickly, the liquid cooling of the generator can be carried out through the cooling device, so that the temperature of the surface of the generator can be cooled down quickly, thereby ensuring that the normal use of the generator will not be affected by the rapid rise in temperature during use.

[0014] 2. The heat dissipation pipe can remove the heat emitted from the surface of the generator, so that the heat no longer stays on the surface of the generator, further enhancing the heat dissipation effect of the generator and shortening the cooling time.

[0015] 3. The fan is set to blow the cold air in the cabin to the generator, cool down the temperature of the generator, and ensure that the generator will not fail due to high temperature.

[0016] 4. The sponge is set up to absorb liquid and prolong the time that the liquid acts on the surface of the generator, ensuring that the heat exchange process between the liquid and the surface of the generator can be fully carried out, enhancing the heat dissipation effect of the generator, and allowing the temperature of the surface of the generator to drop rapidly.

[0017] Furthermore, a plurality of exhaust and heat dissipation pipes are arranged equidistantly along the axial direction of the generator, and the exhaust and heat dissipation pipes are located between the fan and the sponge.

[0018] The exhaust heat dissipation pipe, the fan and the sponge are staggered to ensure that the exhaust heat dissipation pipe, the fan and the sponge do not interfere with each other, thereby enhancing the cooling effect on the generator and improving the cooling efficiency.

[0019] The present solution also provides a cooling device, including a support, a cylindrical box, a transmission shaft, a fan blade, and a generator fixed in the cylindrical box; the cylindrical box is fixed to the support; the transmission shaft is rotatably connected to the cylindrical box; the fan blade is fixed to the transmission shaft; the other end of the transmission shaft away from the fan blade is fixed to the output shaft of the generator, and also includes a cooling mechanism arranged in the cylindrical box; the cooling mechanism includes an annular hollow block, a plurality of cooling components equidistantly arranged along the axial direction of the annular hollow block, a heat dissipation hole opened on the cylindrical box, and a driving mechanism for driving the annular hollow block to rotate. The cooling assembly comprises a plurality of cooling parts which are equidistantly arranged along the circumferential direction of the annular hollow block; the cooling part comprises a piston cylinder, a water tank, a piston block, a side hole opened on the annular hollow block, and a driving unit for driving the piston block to reciprocate along the length direction of the piston cylinder; the piston cylinder is fixedly connected to the side hole; the water tank is fixedly connected to the piston cylinder; the piston block is slidably connected to the piston cylinder; a water inlet pipe and a water outlet pipe are connected to the piston cylinder; the water inlet pipe is connected to the water tank; an atomizing nozzle is fixedly connected to the end of the water outlet pipe away from the piston cylinder, and the atomizing nozzle faces the generator.

[0020] The principles and advantages of this solution are:

[0021] 1. The annular hollow block is driven to rotate by the driving component. During the rotation of the annular hollow block, the piston cylinder rotates synchronously; during the movement of the piston cylinder, the piston block moves synchronously; during the movement of the piston block along the circumferential direction of the annular hollow block, the driving unit drives the piston block to reciprocate along the length direction of the piston cylinder; during the movement of the piston block in the direction away from the water outlet pipe, the piston block pumps water, and the water flows along the water inlet pipe to the piston cylinder and is temporarily stored in the piston cylinder; during the movement of the piston block in the direction close to the water outlet pipe, the piston block drains water, and the water stored in the piston cylinder is discharged along the water outlet pipe. The discharged water has a certain force and can act on the generator; the water acting on the generator can be atomized by the atomizing nozzle to expand the range of water action, so that the contact area between water and the generator is wider, thereby ensuring that the water can quickly exchange heat with the heat generated on the surface of the generator, thereby enhancing the cooling effect and improving the cooling efficiency.

[0022] 2. There are heat dissipation holes on the cylindrical box to facilitate the heat to escape from the heat dissipation holes, further enhancing the heat dissipation effect in the cylindrical box, thereby ensuring that the generator will not have the problem of over-temperature, so that the generator can work efficiently for a long time.

[0023] 3. The purpose of setting up several piston cylinders is to expand the temperature reduction range of the generator in the circumferential direction and the axial direction, and to perform more sufficient and comprehensive temperature reduction in the circumferential direction and the axial direction of the generator in a short time, thereby ensuring that the generator can dissipate heat evenly and further ensuring the normal and efficient operation of the generator.

[0024] Furthermore, the cooling part also includes an auxiliary unit; the auxiliary unit includes a sponge block, a moving block, and an auxiliary part for driving the moving block to reciprocate along the axial direction of the annular hollow block; one end of the sponge block is fixedly connected to the moving block, and the other end of the sponge block is attached to the outer wall of the generator.

[0025] Part of the water sprayed from the outlet pipe will act on the sponge block, making the sponge block moist. On the one hand, it can lock in moisture and prolong the time that water acts on the surface of the generator, ensuring that the process of heat exchange between water and the surface of the generator can be fully carried out, thereby enhancing the cooling effect on the generator and allowing the temperature of the surface of the generator to drop rapidly. On the other hand, it can also clean the surface of the generator and remove dust attached to the surface during the operation of the generator, thereby ensuring that dust will not enter the interior of the generator to interfere with the operation of electronic components, thereby extending the service life of the generator.

[0026] The auxiliary parts drive the moving block to reciprocate along the axial direction of the annular hollow block, thereby expanding the action range of the sponge block, ensuring that any position on the generator can be acted upon, and further enhancing the heat dissipation and cleaning effects.

[0027] Furthermore, a heat dissipation pipe and an exhaust pipe are connected to the piston cylinder; one end of the heat dissipation pipe away from the piston cylinder faces the generator; and the exhaust pipe is connected to the water tank.

[0028] Through the reciprocating motion of the piston block; when the piston block moves away from the heat pipe, the hot air emitted from the surface of the generator enters the piston cylinder along the heat pipe and is temporarily stored; when the piston block moves toward the heat pipe, the hot air in the piston cylinder enters the water tank along the exhaust pipe. After the hot air enters the water tank, heat exchange can be completed quickly, thereby reducing the temperature of the gas and completing cooling.

[0029] Through the reciprocating motion of the piston block, the hot air on the surface of the generator can be continuously pumped and exhausted; in the process of pumping and exhausting, the hot air emitted from the surface of the generator can be quickly dissipated, shortening the cooling time, further enhancing the cooling effect on the generator, ensuring that the hot air will not accumulate on the surface of the generator to affect the operation of the generator, and improving the cooling efficiency.

[0030] Furthermore, a linkage unit is provided on the moving block; the linkage unit includes a rotating shaft, rotating blades, and a linkage member for driving the rotating shaft to rotate; the rotating shaft is rotationally connected to the moving block; the rotating blades are fixedly connected to the rotating shaft, and the rotating blades face the generator.

[0031] During the movement of the moving block along the axial direction of the generator, the linkage drives the rotating shaft to rotate; during the rotation of the rotating shaft, the rotating blades rotate synchronously; during the rotation of the rotating blades, the wind force generated by the rotating blades can effectively cool the hot air dissipated from the surface of the generator by wind, thereby achieving blowing cooling of the surface of the generator, further improving the cooling efficiency of the generator; and, since there are only heat dissipation holes in the cylindrical box for exhaust and exhaust, the rotating blades can generate airflow that flows in a single direction through the heat dissipation holes in the cylindrical box, and the excess heat in the cylindrical box can be taken away during the airflow, further ensuring that the hot air will not be retained in the cylindrical box, thereby enhancing the cooling effect.

[0032] Furthermore, a dust filter is fixedly connected to the heat dissipation hole; it also includes a plurality of flapping parts equidistantly arranged along the circumferential direction of the annular hollow block; the flapping part includes a short shaft, a first cam, a flapping block, a first spring, and a motion unit for driving the short shaft to rotate; the short shaft is rotatably connected to the cylindrical box; the first cam is fixedly connected to the short shaft, and the first cam is abutted against the flapping block; the flapping block is slidably connected to the cylindrical box, and the dust filter is located on the motion trajectory of the flapping block; the two ends of the first spring are respectively connected to the flapping block and the inner wall of the cylindrical box.

[0033] The short shaft is driven to rotate by the motion unit, and the first cam rotates synchronously during the rotation of the short shaft; during the rotation of the first cam, when the raised portion of the first cam abuts against the flapping block, the flapping block moves toward the dust filter, and the first spring is compressed; when the raised portion of the first cam no longer abuts against the flapping block, the flapping block is reset under the action of the first spring, and the flapping block moves away from the dust filter; therefore, the flapping block can reciprocate along the axial direction of the annular hollow block.

[0034] During the movement of the beating block, the beating block can beat the dust accumulated on the dust filter so that the dust no longer clings to the dust filter, ensuring the smooth flow of air, and then ensuring the smooth heat exchange between the cylindrical box and the external unit, thereby further ensuring the heat dissipation effect of the generator and improving the heat dissipation efficiency of the generator.

[0035] The dust filter is set to prevent dust in the air from entering the cylindrical box through the heat dissipation holes, ensuring that the generator located in the cylindrical box will not be disturbed by dust in the air, thereby enabling the generator to operate efficiently for a long time.

[0036] Furthermore, an annular groove is opened on the inner wall of the cylindrical box, and a plurality of connecting rods are fixedly connected to the annular hollow block at equal intervals in the circumferential direction, and the connecting rods are slidably connected to the annular groove; the driving assembly includes a rotating shaft, a first gear, a first annular rack, and a driving part for driving the rotating shaft to rotate; the first gear is fixedly connected to the rotating shaft; the first annular rack is fixedly connected to the outer wall of the annular hollow block, and the first gear is meshed with the first annular rack.

[0037] The driving part drives the rotating shaft to rotate. During the rotation of the rotating shaft, the first gear rotates synchronously. During the rotation of the first gear, the first annular rack rotates driven by the first gear. During the rotation of the first annular rack, the annular hollow block rotates synchronously.

[0038] Furthermore, a number of moving parts are equidistantly arranged in the circumferential direction of the annular hollow block; the moving parts include a screw and a guide rod; the screw is rotatably connected to the cylindrical box; the guide rod is fixed to the cylindrical box; the moving block is threadedly connected to the screw, and the moving block is slidably connected to the guide rod; the auxiliary part is a second gear; the second gear is fixed to the screw; a number of second annular racks are equidistantly fixed to the inner wall of the annular hollow block in the axial direction, and the second gear is meshed with the second annular rack.

[0039] During the forward and reverse rotation of the annular hollow block, the second annular rack rotates synchronously, and the second gear also rotates synchronously driven by the second annular rack, that is, the screw can rotate forward or reverse; during the forward rotation of the screw, the moving block moves along the length direction of the guide rod in the direction away from the transmission shaft; during the reverse rotation of the screw, the moving block moves along the length direction of the guide rod in the direction close to the transmission shaft; therefore, the moving block can reciprocate along the axial direction of the annular hollow block.

[0040] Furthermore, the driving unit includes a second cam and a second spring; the second cam is fixedly connected to the screw; the two ends of the second spring are respectively connected to the piston block and the piston cylinder; a plurality of annular hollow plates are equidistantly arranged in the axial direction of the annular hollow block, the annular hollow plate is composed of a plurality of arc plates, two adjacent arc plates are attached to each other, and the arc plates are fixedly connected to the piston block; the second cam is against the arc plates.

[0041] During the rotation of the screw, the second cam rotates synchronously; during the rotation of the second cam, when the raised portion of the second cam abuts against the arc plate, the piston block moves away from the water outlet pipe and the second spring is compressed; when the raised portion of the second cam no longer abuts against the arc plate, the piston block is reset under the action of the second spring and moves toward the water outlet pipe; therefore, the piston block can reciprocate along the length direction of the piston cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a schematic structural diagram of an embodiment of a cooling device of the present invention.

[0043] Figure 2 for Figure 1 Schematic diagram of the structure of the central cylindrical box from the left side.

[0044] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0045] Figure 4 for Figure 1 Schematic diagram of the structure of the central cylindrical box from the right side.

[0046] Figure 5 for Figure 4 Enlarged view of point B in the middle.

[0047] Figure 6 for Figure 4 Right view of .

[0048] Figure 7 for Figure 6 Enlarged view of point C in the middle.

[0049] Figure 8 for Figure 7 Enlarged view of point D in the middle.

[0050] Fig. 9 for Figure 4 Schematic diagram of the local structure.

[0051] Fig.10 for Fig. 9 Enlarged view of point E in the middle. DETAILED DESCRIPTION

[0052] The following is further described in detail through specific implementation methods:

[0053] The figure marks in the drawings of the specification include: support 1, cylindrical box 2, transmission shaft 3, fan blades 4, generator 5, annular hollow block 6, piston cylinder 7, water tank 8, piston block 9, water outlet pipe 10, sponge block 11, moving block 12, heat dissipation pipe 13, exhaust pipe 14, rotating shaft 15, rotating blade 16, dust filter 17, short shaft 18, first cam 19, slapping block 20, first spring 21, connecting rod 22, rotating shaft 23, first gear 24, first annular rack 25, servo motor 26, screw 27, guide rod 28, second gear 29, second annular rack 30, second cam 31, second spring 32, rack 33, third gear 34, third annular rack 35, fourth gear 36, arc plate 37.

[0054] An embodiment of the present invention provides a method for cooling a wind turbine generator, comprising the following steps:

[0055] Step (1): installing a cooling device; the cooling device is arranged in the engine room, and when the heat dissipation holes are dissipating heat to the generator, the cooling device can perform liquid cooling on the generator, so that the temperature of the generator surface can be quickly reduced;

[0056] Step (2): arranging an exhaust heat dissipation pipe; arranging a plurality of exhaust heat dissipation pipes around the cabin, and the exhaust heat dissipation pipes are directed toward the generator to extract and dissipate air;

[0057] Step (3): Arrange fans; a plurality of fans are arranged at equal intervals in the cabin, and the fans blow air toward the generator to cool it;

[0058] Step (4): arranging a movable sponge; arranging a plurality of sponges at equal intervals on the surface of the generator, and the sponges can move along the axial direction of the generator;

[0059] Step (5): Install a dust filter; install a dust filter on the heat dissipation hole, the dust filter can prevent dust and other foreign matter from entering the cabin.

[0060] Basically as attached Figure 1 , 2 , 3, 4, 5, 6, 7, 8, 9, and 10: it includes a support 1, a cylindrical box 2, a transmission shaft 3, blades 4, and a generator 5 fixedly connected in the cylindrical box 2; the cylindrical box 2 is fixedly connected to the support 1; the transmission shaft 3 is rotatably connected to the cylindrical box 2; the blades 4 are fixedly connected to the transmission shaft 3; the other end of the transmission shaft 3 away from the blades 4 is fixedly connected to the output shaft of the generator 5, and also includes a cooling mechanism arranged in the cylindrical box 2; the cooling mechanism includes an annular hollow block 6, a plurality of cooling components equidistantly arranged in the axial direction of the annular hollow block 6, heat dissipation holes opened on the inner wall of the cylindrical box 2, and a driving component for driving the annular hollow block 6 to rotate; the generator 5 is located in the annular hollow block 6; the cooling component includes a plurality of cooling parts equidistantly arranged in the circumferential direction of the annular hollow block 6 The cooling part includes a piston cylinder 7, a water tank 8, a piston block 9, a side hole opened on the annular hollow block 6, and a driving unit for driving the piston block 9 to reciprocate along the length direction of the piston cylinder 7; the piston cylinder 7 is fixedly connected to the side hole; the water tank 8 is fixedly connected to the top of the piston cylinder 7, and a sufficient amount of water is stored in the water tank 8; the piston block 9 is slidably connected to the inner wall of the piston cylinder 7; the piston cylinder 7 is connected with a water inlet pipe and a water outlet pipe 10; the water inlet pipe is connected with the water tank 8, and the water inlet pipe is provided with a first one-way valve for liquid to flow from the water tank 8 to the piston cylinder 7 in one direction; the end of the water outlet pipe 10 away from the piston cylinder 7 is fixedly connected to an atomizing nozzle, and the atomizing nozzle faces the generator 5, and the water outlet pipe 10 is provided with a second one-way valve for liquid to flow from the piston cylinder 7 to the annular hollow block 6 in one direction.

[0061] The cooling part also includes an auxiliary unit; the auxiliary unit includes a sponge block 11, a moving block 12, and an auxiliary part for driving the moving block 12 to reciprocate along the axial direction of the annular hollow block 6; one end of the sponge block 11 is fixedly connected to the moving block 12, and the other end of the sponge block 11 is in contact with the outer wall of the generator 5.

[0062] The piston cylinder 7 is connected with a heat dissipation pipe 13 and an exhaust pipe 14; the end of the heat dissipation pipe 13 away from the piston cylinder 7 faces the generator 5, and the heat dissipation pipe 13 is provided with a third one-way valve for gas to flow from the annular hollow block 6 to the piston cylinder 7 in one direction; the exhaust pipe 14 is connected with the water tank 8, and the exhaust pipe 14 is provided with a fourth one-way valve for gas to flow from the piston cylinder 7 to the water tank 8 in one direction.

[0063] The moving block 12 is also provided with a linkage unit; the linkage unit includes a rotating shaft 15, a rotating blade 16, and a linkage member for driving the rotating shaft 15 to rotate; the rotating shaft 15 is rotationally connected to the moving block 12; the rotating blade 16 is fixedly connected to the rotating shaft 15, and the rotating blade 16 faces the generator 5.

[0064] A dust filter 17 is fixedly connected to the heat dissipation hole; it also includes a plurality of flapping parts equidistantly arranged in the circumferential direction of the annular hollow block 6; the flapping part includes a short shaft 18, a first cam 19, a flapping block 20, a first spring 21, and a motion unit for driving the short shaft 18 to rotate; the short shaft 18 is rotationally connected to the cylindrical box 2; the first cam 19 is fixedly connected to the short shaft 18, and the first cam 19 is against the flapping block 20; a sliding groove is opened on the inner wall of the cylindrical box 2, and the flapping block 20 is slidably connected to the sliding groove, and the dust filter 17 is located on the motion trajectory of the flapping block 20; the two ends of the first spring 21 are respectively connected to the flapping block 20 and the inner wall of the cylindrical box 2.

[0065] An annular groove is opened on the inner wall of the cylindrical box 2, and a plurality of connecting rods 22 are fixedly connected to the annular hollow block 6 at equal intervals in the circumferential direction, and the connecting rods 22 are slidably connected to the annular groove; the driving assembly includes a rotating shaft 23, a first gear 24, a first annular rack 25, and a driving part for driving the rotating shaft 23 to rotate; the first gear 24 is fixedly connected to the rotating shaft 23; the first annular rack 25 is fixedly connected to the outer wall of the annular hollow block 6, and the first gear 24 is meshed with the first annular rack 25; the driving part is a servo motor 26, the servo motor 26 is fixedly connected to the inner wall of the cylindrical box 2, and the output shaft of the servo motor 26 is fixedly connected to the rotating shaft 23.

[0066] A number of moving parts are equidistantly arranged in the circumferential direction of the annular hollow block 6; the moving parts include a screw 27 and a guide rod 28; the screw 27 is rotatably connected to the inner wall of the cylindrical box 2; the guide rod 28 is fixedly connected to the inner wall of the cylindrical box 2; the moving block 12 is threadedly connected to the screw 27, and the moving block 12 is slidably connected to the guide rod 28; the auxiliary part is a second gear 29; the second gear 29 is fixedly connected to the screw 27; a number of second annular racks 30 are equidistantly fixed to the inner wall of the annular hollow block 6 in the axial direction, and the second gear 29 is meshed with the second annular rack 30.

[0067] The driving unit includes a second cam 31 and a second spring 32; the second cam 31 is fixedly connected to the screw rod 27; the second spring 32 is sleeved on the piston block 9, and the two ends of the second spring 32 are respectively connected to the piston block 9 and the piston cylinder 7; a plurality of annular hollow plates are equidistantly arranged in the axial direction of the annular hollow block 6, and the annular hollow plate is composed of a plurality of arc plates 3, and two adjacent arc plates 3 are attached to each other, and the arc plates 3 are fixedly connected to the piston block 9; the second cam 31 is against the arc plates 3.

[0068] A plurality of racks 33 are fixedly connected to the inner wall of the cylindrical box 2 , and the racks 33 are equidistantly arranged along the circumferential direction of the annular hollow block 6 ; the linkage member is a third gear 34 , which meshes with the rotating shaft 15 , and the third gear 34 meshes with the racks 33 .

[0069] A third annular rack 35 is fixedly connected to the annular hollow block 6 ; the motion unit is a fourth gear 36 , the fourth gear 36 is fixedly connected to the short shaft 18 , and the fourth gear 36 is meshed with the third annular rack 35 .

[0070] The specific implementation process is as follows:

[0071] The fan blades 4 are driven by wind to rotate, thereby causing the transmission shaft 3 to rotate; during the rotation of the transmission shaft 3, the generator 5 converts mechanical energy into electrical energy through the rotation of the transmission shaft 3, thereby generating electricity; the long-term power generation of the generator 5 will cause the temperature of the surface of the generator 5 to rise. During this period, the servo motor 26 is started to drive the rotating shaft 23 to rotate through the servo motor 26; during the rotation of the rotating shaft 23, the first gear 24 rotates synchronously; during the rotation of the first gear 24, the first annular rack 25 rotates driven by the first gear 24; during the rotation of the first annular rack 25, the annular hollow block 6 rotates synchronously.

[0072] During the forward and reverse rotation of the annular hollow block 6, the second rack 33 rotates synchronously, and the second gear 29 also rotates synchronously driven by the second annular rack 30, that is, the screw 27 can rotate forward or reverse; during the rotation of the screw 27, the second cam 31 rotates synchronously; during the rotation of the second cam 31, when the raised portion of the second cam 31 abuts against the arc plate 3, the piston block 9 moves in the direction away from the water outlet pipe 10, and the second spring 32 is compressed; when the raised portion of the second cam 31 no longer abuts against the arc plate 3, the piston block 9 is reset under the action of the second spring 32, and the piston block 9 moves in the direction close to the water outlet pipe 10; therefore, the piston block 9 can reciprocate along the length direction of the piston cylinder 7.

[0073] When the piston block 9 moves away from the water outlet pipe 10, the piston block 9 pumps water, and the water flows along the water inlet pipe to the piston cylinder 7 and is temporarily stored in the piston cylinder 7; when the piston block 9 moves toward the water outlet pipe 10, the piston block 9 drains water, and the water stored in the piston cylinder 7 is discharged along the water outlet pipe 10. The discharged water has a certain force and can act on the generator 5; the water acting on the generator 5 can expand the scope of action of the water after being atomized by the atomizing nozzle, so that the contact area between the water and the generator 5 is wider, thereby ensuring that the water can quickly exchange heat with the heat generated on the surface of the generator 5, thereby enhancing the cooling effect and improving the cooling efficiency.

[0074] The cylindrical box 2 is provided with heat dissipation holes, which facilitate the heat to escape from the heat dissipation holes, further enhancing the heat dissipation effect in the cylindrical box 2, thereby ensuring that the generator 5 will not have the problem of overheating, so that the generator 5 can work efficiently for a long time.

[0075] The provision of a plurality of piston cylinders 7 is to expand the temperature-lowering range of the generator 5 in the circumferential and axial directions, and to perform more sufficient and comprehensive temperature reduction of the generator 5 in the circumferential and axial directions in a short time, thereby ensuring that the generator 5 can dissipate heat evenly, and further ensuring the normal and efficient operation of the generator 5.

[0076] Through the reciprocating motion of the piston block 9; when the piston block 9 moves in the direction away from the heat dissipation pipe 13, the hot air emitted from the surface of the generator 5 enters the piston cylinder 7 along the heat dissipation pipe 13 and is temporarily stored; when the piston block 9 moves in the direction close to the heat dissipation pipe 13, the hot air in the piston cylinder 7 enters the water tank 8 along the exhaust pipe 14. After the hot air enters the water tank 8, heat exchange can be completed quickly, thereby reducing the temperature of the gas and completing cooling.

[0077] Through the reciprocating motion of the piston block 9, the hot air on the surface of the generator 5 can be continuously pumped and exhausted; during the process of pumping and exhausting, the hot air emitted from the surface of the generator 5 can be quickly dissipated, shortening the cooling time, further enhancing the cooling effect on the generator 5, ensuring that the hot air will not accumulate on the surface of the generator 5 to affect the operation of the generator 5, and improving the cooling efficiency.

[0078] During the forward rotation of the screw 27, the moving block 12 moves along the length direction of the guide rod 28 in the direction away from the transmission shaft 3; during the reverse rotation of the screw 27, the moving block 12 moves along the length direction of the guide rod 28 in the direction close to the transmission shaft 3; therefore, the moving block 12 can reciprocate along the axial direction of the annular hollow block 6.

[0079] During the movement of the moving block 12, the sponge block 11 moves synchronously; during the movement of the sponge block 11, a part of the water sprayed from the water outlet pipe 10 will act on the sponge block 11, making the sponge block 11 moist. On the one hand, it can lock the moisture and prolong the time that water acts on the surface of the generator 5, ensuring that the process of heat exchange between the water and the surface of the generator 5 can be fully carried out, thereby enhancing the cooling effect on the generator 5 and allowing the temperature of the surface of the generator 5 to drop rapidly; on the other hand, it can also clean the surface of the generator 5 and remove dust attached to the surface during the operation of the generator 5, thereby ensuring that dust will not enter the interior of the generator 5 to interfere with the operation of electronic components, thereby extending the service life of the generator 5.

[0080] Furthermore, the reciprocating motion of the sponge block 11 along the axial direction of the annular hollow block 6 expands the action range of the sponge block 11, ensuring that any position on the generator 5 can be acted upon, further enhancing the heat dissipation effect and the cleaning effect.

[0081] During the reciprocating motion of the moving block 12 along the axial direction of the generator 5, the rotating shaft 15 moves synchronously; during the movement of the rotating shaft 15, the third gear 34 moves synchronously, and the third gear 34 drives the rotating shaft 15 to rotate by engaging with the rack 33; therefore, while the rotating shaft 15 reciprocates along the axial direction of the generator 5, the rotating shaft 15 can also rotate.

[0082] During the rotation of the rotating shaft 15, the rotating blades 16 rotate synchronously; during the rotation of the rotating blades 16, the wind force generated by the rotating blades 16 can effectively cool the hot air dissipated from the surface of the generator 5 by wind force, thereby achieving the cooling effect of blowing air on the surface of the generator 5, and further improving the cooling efficiency of the generator 5; and, since there are only heat dissipation holes in the cylindrical box 2 for exhaust and exhaust, the rotating blades 16 can generate an airflow that flows in a single direction through the heat dissipation holes in the cylindrical box 2, and the excess heat in the cylindrical box 2 can be taken away during the airflow, further ensuring that the hot air will not be retained in the cylindrical box 2, thereby enhancing the cooling effect.

[0083] During the rotation of the annular hollow block 6, the third annular rack 35 rotates synchronously; during the rotation of the third annular rack 35, the fourth gear 36 rotates because the fourth gear 36 meshes with the third annular rack 35; during the rotation of the fourth gear 36, the short shaft 18 rotates synchronously. During the rotation of the short shaft 18, the first cam 19 rotates synchronously; during the rotation of the first cam 19, when the protrusion of the first cam 19 abuts against the flapping block 20, the flapping block 20 moves toward the direction close to the dust filter 17, and the first spring 21 is compressed; when the protrusion of the first cam 19 no longer abuts against the flapping block 20, the flapping block 20 is reset under the action of the first spring 21, and the flapping block 20 moves away from the dust filter 17; therefore, the flapping block 20 can reciprocate along the axial direction of the annular hollow block 6.

[0084] During the movement of the beating block 20, the beating block 20 can beat the dust accumulated on the dust filter 17, so that the dust no longer adheres to the dust filter 17, thereby ensuring the smooth flow of air, and then ensuring the smooth heat exchange between the cylindrical box 2 and the external unit, thereby further ensuring the heat dissipation effect of the generator 5 and improving the heat dissipation efficiency of the generator 5.

[0085] The above is only an embodiment of the present invention, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A method for cooling a wind turbine generator, comprising the following steps, characterized in that: Step (1): installing a cooling device; the cooling device is arranged in the engine room, and when the heat dissipation holes are dissipating heat to the generator, the cooling device can perform liquid cooling on the generator, so that the temperature of the generator surface can be quickly reduced; Step (2): arranging an exhaust heat dissipation pipe; arranging a plurality of exhaust heat dissipation pipes around the nacelle, wherein the exhaust heat dissipation pipes are directed toward the generator to extract and dissipate air; Step (3): Arrange fans; a plurality of fans are arranged at equal intervals in the cabin, and the fans blow air toward the generator to cool it down; Step (4): arranging a movable sponge; arranging a plurality of sponges at equal intervals on the surface of the generator, wherein the sponges can move along the axial direction of the generator; Step (5): Install a dust filter. Install a dust filter on the heat dissipation hole. The dust filter can prevent dust and other foreign matter from entering the cabin.

2. A method for cooling a wind turbine generator according to claim 1, characterized in that: A plurality of air extraction and heat dissipation pipes are arranged at equal distances along the axial direction of the generator, and the air extraction and heat dissipation pipes are located between the fan and the sponge.

3. A cooling device according to claim 2, comprising a support, a cylindrical box, a transmission shaft, a fan blade, and a generator fixed in the cylindrical box; the cylindrical box is fixed to the support; the transmission shaft is rotatably connected to the cylindrical box; the fan blade is fixed to the transmission shaft; the other end of the transmission shaft away from the fan blade is fixed to the output shaft of the generator, characterized in that: It also includes a cooling mechanism arranged in the cylindrical box; the cooling mechanism includes an annular hollow block, a plurality of cooling components equidistantly arranged along the axial direction of the annular hollow block, heat dissipation holes opened on the cylindrical box, and a driving component for driving the annular hollow block to rotate; the cooling component includes a plurality of cooling parts equidistantly arranged along the circumferential direction of the annular hollow block; the cooling part includes a piston cylinder, a water tank, a piston block, a side hole opened on the annular hollow block, and a driving unit for driving the piston block to reciprocate along the length direction of the piston cylinder; the piston cylinder is fixedly connected to the side hole; the water tank is fixedly connected to the piston cylinder; the piston block is slidably connected to the piston cylinder; a water inlet pipe and a water outlet pipe are connected to the piston cylinder; the water inlet pipe is connected to the water tank; an atomizing nozzle is fixedly connected to the end of the water outlet pipe away from the piston cylinder, and the atomizing nozzle faces the generator.

4. The cooling device according to claim 3, characterized in that: The cooling part also includes an auxiliary unit; the auxiliary unit includes a sponge block, a moving block, and an auxiliary part for driving the moving block to reciprocate along the axial direction of the annular hollow block; one end of the sponge block is fixedly connected to the moving block, and the other end of the sponge block is attached to the outer wall of the generator.

5. The cooling device according to claim 4, characterized in that: The piston cylinder is connected with a heat dissipation pipe and an exhaust pipe; one end of the heat dissipation pipe away from the piston cylinder faces the generator; and the exhaust pipe is connected with a water tank.

6. The cooling device according to claim 5, characterized in that: The moving block is also provided with a linkage unit; the linkage unit comprises a rotating shaft, rotating blades, and a linkage member for driving the rotating shaft to rotate; the rotating shaft is rotationally connected to the moving block; the rotating blades are fixedly connected to the rotating shaft, and the rotating blades face the generator.

7. The cooling device according to claim 6, characterized in that: A dust filter is fixedly connected to the heat dissipation hole; it also includes a plurality of flapping parts equidistantly arranged along the circumferential direction of the annular hollow block; the flapping part includes a short shaft, a first cam, a flapping block, a first spring, and a motion unit for driving the short shaft to rotate; the short shaft is rotatably connected to the cylindrical box; the first cam is fixedly connected to the short shaft, and the first cam is against the flapping block; the flapping block is slidably connected to the cylindrical box, and the dust filter is located on the motion trajectory of the flapping block; the two ends of the first spring are respectively connected to the flapping block and the inner wall of the cylindrical box.

8. The cooling device according to claim 7, characterized in that: An annular groove is opened on the inner wall of the cylindrical box, and a plurality of connecting rods are fixedly connected to the annular hollow block at equal intervals in the circumferential direction, and the connecting rods are slidably connected to the annular groove; the driving assembly includes a rotating shaft, a first gear, a first annular rack, and a driving part for driving the rotating shaft to rotate; the first gear is fixedly connected to the rotating shaft; the first annular rack is fixedly connected to the outer wall of the annular hollow block, and the first gear is meshed with the first annular rack.

9. The cooling device according to claim 8, characterized in that: A number of moving parts are equidistantly arranged in the circumferential direction of the annular hollow block; the moving parts include a screw and a guide rod; the screw is rotatably connected to the cylindrical box; the guide rod is fixed to the cylindrical box; the moving block is threadedly connected to the screw, and the moving block is slidably connected to the guide rod; the auxiliary part is a second gear; the second gear is fixed to the screw; a number of second annular racks are equidistantly fixed to the inner wall of the annular hollow block in the axial direction, and the second gear is meshed with the second annular rack.

10. The cooling device according to claim 9, characterized in that: The driving unit includes a second cam and a second spring; the second cam is fixedly connected to the screw rod; the two ends of the second spring are respectively connected to the piston block and the piston cylinder; a plurality of annular hollow plates are equidistantly arranged in the axial direction of the annular hollow block, the annular hollow plate is composed of a plurality of arc plates, two adjacent arc plates are attached to each other, and the arc plates are fixedly connected to the piston block; the second cam is against the arc plates.

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