Heat dissipation system of wind power generation motor

Abstract

The heat dissipation system comprises a base, an oil-gas separation box and a transfer case, a generator, a radiator, an oil pump and an air blower are arranged on the base, the generator is a double-shaft generator, the radiator is filled with insulating liquid, an outlet of the radiator is communicated with an oil conveying pipe, one end of the oil conveying pipe is communicated with an atomizer, and the other end of the oil conveying pipe is communicated with a fan. The air blower is provided with a filter screen and communicated with an air inlet pipe, the air inlet pipe is communicated with the shell of the generator, the oil-gas separation box is communicated with an exhaust pipe, an oil discharge pipe and an exhaust pipe, the exhaust pipe is communicated with the shell of the generator, and the oil discharge pipe is communicated with an inlet of the radiator. The transfer case is connected with the generator, the oil pump and the air blower. The utility model provides a heat dissipation system of a wind power generation motor. An oil pump and an air blower are synchronously driven by rotation of an output shaft of a generator to cool the generator.

Description

Technical Field

[0001] This utility model relates to the field of generator heat dissipation technology, and in particular to a heat dissipation system for a wind power generator. Background Technology

[0002] Existing wind power generation equipment uses a fan impeller that is rotatably connected to the base of the equipment. Multiple blades are installed on the fan impeller, which is connected to a gearbox to drive the gearbox to run. The gearbox is connected to an engine to drive a generator to generate electricity. A casing is installed on top of the base to cover the above components.

[0003] During continuous operation, generators generate a large amount of heat due to electromagnetic losses and mechanical friction. The internal temperature rise directly affects the winding insulation performance and the stability of power generation efficiency. Existing heat dissipation solutions generally rely on external airflow guidance technology, which involves designing air ducts on the casing to introduce ambient air into the equipment and using convection heat transfer to reduce the external temperature of the generator.

[0004] However, the above methods have significant limitations. External airflow can only act on the surface areas such as the generator casing and heat dissipation fins. The core heat-generating components such as the internal stator and rotor cannot directly contact the cold air due to the closed structure, resulting in continuous heat accumulation inside. The heat retention in the high-temperature areas inside the generator will accelerate material aging and restrict the long-term operational stability and energy efficiency of the wind power generation system. Utility Model Content

[0005] The purpose of this invention is to provide a cooling system for a wind turbine generator, which utilizes the rotation of the generator output shaft to synchronously drive the oil pump and blower to cool the generator.

[0006] The technical solution adopted by the heat dissipation system of the wind turbine disclosed in this utility model is as follows:

[0007] The system includes a base, an oil-gas separator, and a transfer case. The base houses a generator, a radiator, an oil pump, and a blower. The generator is a dual-shaft generator. The radiator is filled with insulating liquid, and its outlet is connected to an oil supply pipe. One end of the oil supply pipe is connected to an atomizer, whose spray nozzle is connected to the generator's casing. The oil pump is connected to the middle of the oil supply pipe. The blower's inlet is equipped with a filter, and its outlet is connected to an inlet pipe, which is connected to the generator's casing. The oil-gas separator is connected to an exhaust pipe, an oil drain pipe, and an air exhaust pipe. The exhaust pipe is connected to the generator's casing, and the oil drain pipe is connected to the radiator's inlet. The transfer case's input shaft is connected to the generator's output shaft. The oil pump's input shaft is connected to one of the transfer case's output shafts, and the blower's input shaft is connected to the other output shaft of the transfer case.

[0008] As a preferred embodiment, the oil-gas separator is equipped with a filter element, which divides the oil-gas separator into a first chamber and a second chamber. The exhaust pipe and the oil drain pipe are both connected to the first chamber, and the exhaust pipe is connected to the second chamber. The first chamber is located below the second chamber.

[0009] As a preferred embodiment, the bottom surface of the first cavity is conical, the connection point of the oil drain pipe to the first cavity is located at the tip of the cone, and the height of the exhaust pipe is higher than the height of the oil drain pipe.

[0010] As a preferred embodiment, the air inlet pipe is inclined at a certain angle on the generator casing.

[0011] As a preferred embodiment, the radiator includes a bracket and an oil storage pipe. The bracket is fixedly connected to the bottom of the base. The insulating liquid is placed inside the oil storage pipe. The oil storage pipe is arranged in a serpentine path inside the bracket, and multiple U-shaped channels are formed on the outside of the oil storage pipe at intervals. Multiple heat dissipation fins are fixedly connected inside the channels at intervals. Both ends of the oil storage pipe extend out of the bracket. The oil supply pipe and the oil discharge pipe are respectively connected to both ends of the oil storage pipe.

[0012] As a preferred embodiment, the system also includes a spring safety valve, the inlet of which is connected to the middle of the oil delivery pipe, and the outlet of which is connected to a return pipe, which is connected to the first cavity.

[0013] The beneficial effects of the heat dissipation system for a wind turbine disclosed in this utility model are:

[0014] The output shaft of the gearbox is connected to the input shaft of the generator. The fan impeller drives the generator to generate electricity through the gearbox. The output shaft of the generator drives the transfer case to run synchronously through the input shaft of the transfer case, so that the transfer case can drive the oil pump and the blower to run synchronously.

[0015] The oil pump draws insulating liquid from the radiator and injects it into the atomizer through the oil pipe. The atomizer turns the insulating liquid into a mist and sprays it into the generator casing. The mist-like insulating liquid exchanges heat with the stator and rotor, thereby cooling them. The blower draws in ambient air purified by the filter through the air inlet and injects the air into the generator casing through the air inlet pipe. The air exchanges heat with the stator and rotor, thereby further cooling them.

[0016] After heat exchange, the insulating liquid flows to the bottom of the generator casing and forms a gas-liquid mixture with the air. It is then introduced into the oil-gas separator through the exhaust pipe. The oil-gas separator separates the insulating liquid from the air. The high-temperature insulating liquid enters the radiator through the oil drain pipe for air cooling, while the high-temperature air is discharged outside the equipment through the exhaust pipe.

[0017] The rotation of the generator output shaft drives the oil pump and blower to run synchronously via the transfer case. These drive the cooling path of insulating liquid atomization and the air cooling path to cool the generator internally. This not only eliminates the need for external power to drive the oil pump and blower, but also effectively eliminates the accumulation of local hot spots in the stator and rotor inside the generator. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the heat dissipation system of a wind power generator according to the present invention.

[0019] Figure 2 This is a schematic diagram of the connection between the generator and the transfer motor in the heat dissipation system of a wind power generator according to this utility model.

[0020] Figure 3 This is a cross-sectional view of the heat sink of a wind power generator cooling system according to this utility model.

[0021] Figure 4 This is a schematic diagram of the oil pump structure of a cooling system for a wind turbine generator according to this utility model.

[0022] Figure 5 This is a schematic diagram of the air inlet pipe structure of a heat dissipation system for a wind turbine generator according to this utility model.

[0023] Figure 6 This is a partial cross-sectional view of the oil-gas separator of a cooling system for a wind turbine generator according to this utility model. Detailed Implementation

[0024] The present invention will be further described and illustrated below with reference to specific embodiments and the accompanying drawings:

[0025] Please refer to Figure 1 and Figure 2 .

[0026] The present invention discloses a heat dissipation system for a wind turbine generator, comprising a base 1, an oil-gas separator 5, and a transfer case 14;

[0027] A generator 13, an oil pump 3, a blower 4, and a radiator 2 are fixedly connected to the base 1. In this embodiment, the generator 13 is preferably a dual-shaft generator 13, which is fixedly connected to the top of the base 1. The fan impeller 11 is rotatably connected to the base 1, and the gearbox 12 is fixedly connected to the base 1. The central shaft of the fan impeller 11 is connected to the input shaft of the gearbox 12, and the output shaft of the gearbox 12 is connected to the input shaft of the generator 13. The ambient wind drives the fan impeller 11 to rotate, and the fan impeller 11 drives the generator 13 to generate electricity through the gearbox 12.

[0028] The transfer case 14 is fixedly connected to the base 1. A first coupling 131 is provided between the transfer case 14 and the generator 13. The input shaft of the transfer case 14 is connected to the output shaft of the generator 13 through the first coupling 131. A second coupling is provided between the transfer case 14 and the oil pump 3. The input shaft of the oil pump 3 is connected to one of the output shafts of the transfer case 14 through the second coupling. A third coupling is provided between the transfer case 14 and the blower 4. The input shaft of the blower 4 is connected to the other output shaft of the transfer case 14 through the third coupling.

[0029] When the generator 13 is running, the generator 13 drives the oil pump 3 and the blower 4 to run synchronously via the transfer case 14, so that neither the oil pump 3 nor the blower 4 needs external power to drive them, making the cooling system more energy-efficient.

[0030] Please refer to Figures 1-4 .

[0031] The radiator 2 is filled with an insulating liquid. In this embodiment, the insulating liquid is preferably insulating oil. The radiator 2 includes a bracket 21 and an oil storage pipe 22. The bracket 21 is fixedly connected to the bottom of the base 1. The insulating oil is placed in the oil storage pipe 22. The oil storage pipe 22 is arranged in a serpentine path in the bracket 21, and multiple U-shaped channels are formed on the outside of the oil storage pipe 22. Multiple heat dissipation fins 221 are fixedly connected in the channels. Both ends of the oil storage pipe 22 extend out of the bracket 21.

[0032] The storage capacity of insulating oil is increased by increasing the length of the oil storage pipe 22 within a limited area, and the area of ​​heat exchange between the oil storage pipe 22 and the ambient air is increased. The heat dissipation fins 221 further improve the efficiency of heat exchange between the oil storage pipe 22 and the ambient air to cool the insulating oil.

[0033] When the equipment is installed outdoors, the base 1 can block sunlight from shining directly on the radiator 2, thus preventing the temperature of the insulating oil inside the radiator 2 from rising due to sunlight exposure.

[0034] The outlet of radiator 2 is connected to an oil supply pipe 31. One end of the oil supply pipe 31 is connected to an atomizer. The spray nozzle of the atomizer is connected to the outer casing of generator 13. The connection between the spray nozzle of the atomizer and the outer casing of generator 13 is located at the top of the outer casing of generator 13. The other end of the oil supply pipe 31 is connected to one end of the oil storage pipe 22.

[0035] Furthermore, the oil pump 3 is connected to the middle of the oil pipeline 31, and the oil pump 3 drives the insulating oil to flow in the oil pipeline 31.

[0036] When the generator 13 is running, it drives the oil pump 3 to run synchronously. The oil pump 3 draws insulating oil from the oil storage pipe 22 and injects it into the atomizer through the oil delivery pipe 31. The atomizer converts the insulating oil into oil mist and sprays it into the casing of the generator 13. The oil mist exchanges heat with the stator and rotor, thereby cooling them. Since the insulating oil contacts the rotor in the form of oil mist, the impact force of liquid hammer on the rotor during rotation is reduced.

[0037] Please refer to Figure 1 , Figure 2 and Figure 5 .

[0038] The air inlet of the blower 4 is equipped with a filter screen. When the air inlet of the blower 4 draws in outside air, it needs to be purified by the filter screen to prevent foreign objects from entering the interior of the generator 13.

[0039] Furthermore, the air outlet of the blower 4 is connected to the air inlet pipe 41, which is connected to the housing of the generator 13. The blower 4 injects air into the housing of the generator 13 through the air inlet pipe 41, and the air exchanges heat with the stator and rotor, thereby further cooling them.

[0040] Furthermore, in this embodiment, the air inlet pipe 41 is preferably tilted at a certain angle on the outer casing of the generator 13, so that when the air inlet pipe 41 injects air into the outer casing of the generator 13, the air flow direction is consistent with the rotation direction of the rotor, thus avoiding the air inlet pipe 41 injecting air into the outer casing of the generator 13 and applying wind resistance to the rotor.

[0041] Please refer to Figure 1 , Figure 2 and Figure 6 .

[0042] The oil-gas separator 5 is fixedly connected to the top of the base 1. The oil-gas separator 5 is connected to an exhaust pipe 521, an oil drain pipe 522, and an air vent pipe 531. The oil-gas separator 5 is equipped with a filter element 51. The filter element 51 divides the oil-gas separator 5 into a first chamber 52 and a second chamber 53. The exhaust pipe 521 and the oil drain pipe 522 are both connected to the first chamber 52, and the air vent pipe 531 is connected to the second chamber 53. The first chamber 52 is located below the second chamber 53.

[0043] Furthermore, the exhaust pipe 521 is connected to the outer casing of the generator 13, and the connection between the exhaust pipe 521 and the outer casing of the generator 13 is located at the bottom of the outer casing of the generator 13; one end of the oil drain pipe 522 is connected to the inlet of the radiator 2, and one end of the oil drain pipe 522 is connected to the other end of the oil storage pipe 22; the height of the exhaust pipe 521 is higher than the height of the oil drain pipe 522; one end of the exhaust pipe 531 extends out of the outside of the equipment.

[0044] Furthermore, the bottom surface of the first cavity 52 is conical, and the connection point of the oil drain pipe 522 with the first cavity 52 is located at the tip of the cone.

[0045] After heat exchange, the insulating oil and air converge at the bottom of the generator 13 casing, forming a gas-liquid mixture with the air. This mixture is then introduced into the first chamber 52 of the oil-gas separator 5 through the exhaust pipe 521. Because the insulating oil is heavier, it settles at the conical bottom of the first chamber 52 and flows back to the oil storage pipe 22 through the oil drain pipe 522 for cooling. Because the air is lighter, it passes through the filter element 51 into the second chamber 53 and is discharged to the outside of the equipment through the exhaust pipe 531. The filter element 51 can only pass through air, thus isolating the insulating oil in the first chamber 52.

[0046] Please refer to Figure 1 , Figure 2 , Figure 4 and Figure 6 .

[0047] It also includes a spring safety valve 32, the oil inlet of which is connected to the middle of the oil delivery pipe 31, and the oil outlet of the spring safety valve 32 is connected to a return oil pipe 321, which is connected to the first cavity 52.

[0048] When encountering strong winds that cause the fan impeller 11 to rotate rapidly, and the generator 13 drives the oil pump 3 to operate at high power, due to the limited flow of the atomizer, when the pressure in the oil supply pipe 31 reaches the preset pressure threshold, the spring safety valve 32 gradually opens the connection between the return oil pipe 321 and the oil supply pipe 31, allowing some of the insulating oil in the oil supply pipe 31 to flow back into the first cavity through the return oil pipe 321, thereby reducing the operating pressure of the atomizer and preventing damage to the atomizer; after the internal pressure of the oil supply pipe 31 decreases, the spring safety valve 32 gradually closes the connection between the return oil pipe 321 and the oil supply pipe 31.

[0049] This utility model provides a heat dissipation system for a wind turbine generator. The output shaft of the gearbox is connected to the input shaft of the generator. The fan impeller drives the generator to operate and generate electricity through the gearbox. The output shaft of the generator drives the transfer case to operate synchronously through the input shaft of the transfer case, so that the transfer case can drive the oil pump and the blower to operate synchronously.

[0050] The oil pump draws insulating liquid from the radiator and injects it into the atomizer through the oil pipe. The atomizer turns the insulating liquid into a mist and sprays it into the generator casing. The mist-like insulating liquid exchanges heat with the stator and rotor, thereby cooling them. The blower draws in ambient air purified by the filter through the air inlet and injects the air into the generator casing through the air inlet pipe. The air exchanges heat with the stator and rotor, thereby further cooling them.

[0051] After heat exchange, the insulating liquid flows to the bottom of the generator casing and forms a gas-liquid mixture with the air. It is then introduced into the oil-gas separator through the exhaust pipe. The oil-gas separator separates the insulating liquid from the air. The high-temperature insulating liquid enters the radiator through the oil drain pipe for air cooling, while the high-temperature air is discharged outside the equipment through the exhaust pipe.

[0052] The rotation of the generator output shaft drives the oil pump and blower to run synchronously via the transfer case. These drive the cooling path of insulating liquid atomization and the air cooling path to cool the generator internally. This not only eliminates the need for external power to drive the oil pump and blower, but also effectively eliminates the accumulation of local hot spots in the stator and rotor inside the generator.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. A heat dissipation system for a wind turbine generator, characterized in that, include The base is equipped with a generator, a radiator, an oil pump, and a blower. The generator is a dual-shaft generator. The radiator is filled with insulating liquid. The outlet of the radiator is connected to an oil supply pipe. One end of the oil supply pipe is connected to an atomizer. The spray nozzle of the atomizer is connected to the outer casing of the generator. The oil pump is connected to the middle of the oil supply pipe. The air inlet of the blower is equipped with a filter screen. The air outlet of the blower is connected to an air inlet pipe. The air inlet pipe is connected to the outer casing of the generator. An oil-gas separator is provided, which is connected to an exhaust pipe, an oil drain pipe and an air vent pipe. The exhaust pipe is connected to the generator casing and the oil drain pipe is connected to the radiator inlet. The transfer case has an input shaft connected to the generator's output shaft, an oil pump's input shaft connected to one of the transfer case's output shafts, and a blower's input shaft connected to the other output shaft of the transfer case.

2. The heat dissipation system for a wind turbine generator as described in claim 1, characterized in that, The oil-gas separator is equipped with a filter element, which divides the oil-gas separator into a first chamber and a second chamber. The exhaust pipe and the oil drain pipe are both connected to the first chamber, and the exhaust pipe is connected to the second chamber. The first chamber is located below the second chamber.

3. The heat dissipation system for a wind turbine generator as described in claim 2, characterized in that, The bottom surface of the first cavity is conical, the connection point of the oil drain pipe to the first cavity is located at the tip of the cone, and the height of the exhaust pipe is higher than the height of the oil drain pipe.

4. The heat dissipation system for a wind turbine generator as described in claim 3, characterized in that, The air intake pipe is tilted at a certain angle on the generator casing.

5. The heat dissipation system for a wind turbine generator as described in claim 4, characterized in that, The radiator includes a bracket and an oil storage pipe. The bracket is fixedly connected to the bottom of the base. The insulating liquid is placed inside the oil storage pipe. The oil storage pipe is arranged in a serpentine path inside the bracket, and multiple U-shaped channels are formed on the outside of the oil storage pipe at intervals. Multiple heat dissipation fins are fixedly connected inside the channels at intervals. Both ends of the oil storage pipe extend out of the bracket. The oil supply pipe and the oil discharge pipe are respectively connected to the two ends of the oil storage pipe.

6. The heat dissipation system for a wind turbine generator as described in claim 5, characterized in that, It also includes a spring safety valve, the oil inlet of which is connected to the middle of the oil delivery pipe, and the oil outlet of which is connected to a return oil pipe, which is connected to the first cavity.

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