Cooling system of wind turbine generator

Abstract

The wind turbine generator cooling system comprises a cabin, a generator set is arranged in the cabin, a housing is arranged on the outer side of the cabin, the generator set is in transmission connection with fan blades on the outer side of the housing, a tower pipe is connected to the lower portion of the cabin, a first supporting plate is arranged on the tower pipe, and a heat dissipation assembly is arranged at the upper end of the first supporting plate. The heat dissipation assembly comprises a heat dissipation box, an air pipe assembly is installed at the upper end in the heat dissipation box and comprises an air inlet pipe and an air outlet pipe, the upper end of the heat dissipation box is connected with one end of a ventilation pipe, the other end of the ventilation pipe extends into the housing, an exhaust hole is formed in the rear end of the housing, a fan is installed at one end of the ventilation pipe, and an air supplementing pipe is arranged at the bottom end of the heat dissipation box. A filter cloth bag is arranged at an air inlet of the air supply pipe; cold air in the heat dissipation box is introduced into the housing through the draught fan and used for cooling the gear box, the generator and other devices in the housing, and the devices are kept at the normal working temperature.

Description

Technical Field

[0001] The present invention belongs to the technical field of wind turbine cooling equipment, and in particular relates to a wind turbine cooling system. Background Art

[0002] Wind turbines are power generation equipment that rely on capturing wind energy and converting kinetic energy into electrical energy. In modern large-scale wind turbines, as the power generation capacity of a single unit increases, the heat generated by the heat-generating components inside the wind turbine increases. In particular, wind turbines installed in a high-temperature environment for a long time are prone to failure during operation.

[0003] Large wind turbines consist of two major parts: a mechanical part and an electrical part. The mechanical part includes the wind rotor, generator, yaw system, and pitch system. Its function is to drive the generator to rotate and convert wind energy into mechanical energy. The electrical part includes the frequency converter, transformer, and power grid. Its function is to convert mechanical energy into constant alternating current with a frequency and waveform consistent with the power grid.

[0004] During the operation of a wind turbine, its inverter and mechanical parts will generate heat. In order to avoid malfunction of the generator components when operating in a high temperature environment, it is necessary to cool the generator components in time. Summary of the Invention

[0005] In order to solve the problems encountered in the above background technology, the present application proposes a wind turbine cooling system for cooling the working parts of the wind turbine to ensure the normal operation of the wind turbine.

[0006] To achieve the above object, the present invention provides the following technical solutions: A wind turbine cooling system comprises a cabin, a generator set is arranged in the cabin, a cover is arranged on the outside of the cabin, the generator set is drivingly connected to the fan blades on the outside of the cover, the lower part of the cabin is connected to a tower pipe, a first support plate is arranged on the tower pipe, a heat dissipation component is arranged on the upper end of the first support plate, the heat dissipation component comprises a heat dissipation box, a duct assembly is installed on the upper end of the heat dissipation box, the duct assembly comprises an air inlet pipe and an air outlet pipe, one end of a ventilation pipe is connected to the upper end of the heat dissipation box, the other end of the ventilation pipe extends into the cover, an exhaust hole is arranged at the rear end of the cover, a fan is installed at one end of the ventilation pipe, an air supply pipe is arranged at the bottom end of the heat dissipation box, and a filter bag is arranged at the air inlet of the air supply pipe.

[0007] In one embodiment of the present application, a deflector is provided at the air inlet of the air inlet pipe, a plurality of air outlet pipes are connected to the pipe body of the air inlet pipe, and the air outlets of the air outlet pipes are provided outside the heat dissipation box.

[0008] In one embodiment of the present application, a plurality of first fins are provided on the tube body of the air inlet duct.

[0009] In one embodiment of the present application, the end of the vent pipe extending into the housing is connected to a hole-discharging pipe, and the hole-discharging pipe is provided with a plurality of air holes facing the generator equipment.

[0010] In one embodiment of the present application, an electrical box is provided in the heat dissipation box.

[0011] In one embodiment of the present application, a plurality of second fins are provided on the outside of the electrical box.

[0012] In one embodiment of the present application, a sound insulation layer is provided on the outer wall of the heat dissipation box.

[0013] In one embodiment of the present application, a plurality of pillars are provided at the bottom of the tower tube for cooperating with a wind power foundation.

[0014] In one embodiment of the present application, a counterweight is provided on the first support plate.

[0015] In one embodiment of the present application, a temperature detection device is provided in the nacelle, the temperature detection device is electrically connected to a controller, and the controller is electrically connected to the wind turbine.

[0016] In summary, the technical solution proposed in this application includes the following beneficial technical effects: this application uses airflow to carry low-temperature air into the air inlet pipe of the air duct assembly, and then blows it out from the air outlet pipe of the air duct assembly. During the flow of the airflow in the air duct assembly, heat exchange is performed in the heat sink, so that the temperature in the heat sink is reduced. The other end of the ventilation pipe extends into the cover, and a fan is installed at one end of the ventilation pipe. The cold air in the heat sink is passed into the cover through the fan, which is used to cool the gear box, generator and other equipment in the cover, so that the equipment is maintained at normal operating temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0018] Figure 1 A schematic diagram of the three-dimensional structure of a wind turbine cooling system provided in one embodiment of the present application; Figure 2 A schematic diagram of the rear view of a heat sink box of a wind turbine cooling system according to an embodiment of the present application; Figure 3A schematic top view of a three-dimensional structure of a wind turbine cooling system according to an embodiment of the present application; Figure 4 A schematic diagram of the upper cross-sectional structure of a heat sink of a wind turbine cooling system provided in one embodiment of the present application; Figure 5 A schematic diagram of the cabin structure of a wind turbine cooling system provided in one embodiment of the present application; Figure 6 This is a schematic diagram of the external structure of the heat dissipation box of the wind turbine cooling system provided in one embodiment of the present application.

[0019] In the figure: nacelle 1, cover 11; exhaust hole 111; Tower tube 2, support 21; First support plate 3, counterweight block 31; Radiator box 4, ventilation pipe 41, fan 411, hole-discharging pipe 412, air supply pipe 42, electrical box 43, sound insulation layer 44; The air duct assembly 5 includes an air inlet pipe 51 , a flow guide cover 511 , a first fin 512 , and an air outlet pipe 52 . DETAILED DESCRIPTION

[0020] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application are clearly and completely described below. Obviously, the described embodiments are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts also fall within the scope of protection of this application.

[0021] It should be noted that in the description of this application, the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0022] The terms "mounted," "connected," and "connected" in this application should be interpreted broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical connections; direct connections or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.

[0023] In the embodiments of this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of this application should not be interpreted as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0024] This embodiment provides a wind turbine cooling system, see Figures 1-6 As shown, it includes a cabin 1, in which a generator set is arranged, a cover shell 11 is arranged on the outside of the cabin 1, the generator set is connected to the fan blades on the outside of the cover shell 11, the lower part of the cabin 1 is connected to a tower pipe 2, the tower pipe 2 is provided with a first support plate 3, the upper end of the first support plate 3 is provided with a heat dissipation component, the heat dissipation component includes a heat dissipation box 4, the upper end of the heat dissipation box 4 is installed with a duct assembly 5, the duct assembly 5 includes an air inlet pipe 51 and an air outlet pipe 52, the upper end of the heat dissipation box 4 is connected to one end of a ventilation pipe 41, the other end of the ventilation pipe 41 extends into the cover shell 11, the rear end of the cover shell 11 is provided with an exhaust hole 111, one end of the ventilation pipe 41 is installed with a fan 411, the bottom end of the heat dissipation box 4 is provided with an air supply pipe 42, and the air inlet of the air supply pipe 42 is provided with a filter bag.

[0025] In the above embodiment, a generator set is installed within the nacelle 1, and a cover 11 is disposed outside the nacelle 1. Cover 11 is made of a lightweight, high-strength composite material (such as fiberglass). Cover 11 protects the gearbox, generator, and other equipment within the nacelle 1 from erosion and damage from harsh natural environments such as wind, sand, rain, snow, salt spray, hail, and ultraviolet radiation. Optionally, the exterior of cover 11 may be curved to reduce wind resistance. The generator set is drivingly connected to the fan blades on the exterior of cover 11. A tower tube 2 is connected to the lower portion of the nacelle 1 to support the nacelle 1. A first support plate 3 is mounted on the tower tube 2. A heat sink assembly is located at the top of the first support plate 3 to cool and dissipate heat from the operating equipment within the nacelle 1. The heat dissipation assembly includes a heat dissipation box 4, which is welded / stamped from aluminum alloy or galvanized steel sheet. A duct assembly 5 is installed at the upper end of the heat dissipation box 4, and one end of a vent pipe 41 is connected to the heat dissipation box 4. The other end of the vent pipe 41 extends into the housing 11. Wind turbines are usually installed in windy areas. Airflow carrying low-temperature air blows in from the air inlet pipe 51 of the duct assembly 5 and then blows out from the air outlet pipe 52 of the duct assembly 5. During the flow of air in the duct assembly 5, heat exchange is performed in the heat dissipation box 4, thereby reducing the temperature in the heat dissipation box 4. Furthermore, the external airflow exchanges heat with the heat dissipation box 4 through the duct assembly 5, so that the heat dissipation box 4 does not come into direct contact with the external airflow, preventing sand and dust impurities carried by the external airflow from entering the heat dissipation box 4, thereby improving the cleanliness of the air in the heat dissipation box 4. Furthermore, the other end of the vent pipe 41 extends into the housing 11. A fan 411 is mounted at one end of the vent pipe 41. This fan 411 draws cool air from the heat sink 4 into the housing 11, cooling the gearbox, generator, and other equipment within the housing 11 to maintain normal operating temperatures. Furthermore, the air within the heat sink 4 is shielded from direct contact with the outside world, preventing impurities from entering the nacelle 1 and contaminating the equipment. For example, dust and sand can wear out the bearing gears, affecting the transmission efficiency of the generator and, consequently, the power generation efficiency of the wind turbine. Furthermore, an exhaust hole 111 is provided at the rear end of the cover 11. After the cooling gas blown in by the ventilation pipe 41 exchanges heat with the equipment in the cabin 1, the temperature of the equipment is reduced and is discharged from the cabin 1 through the exhaust hole 111 to maintain the air pressure balance in the cabin 1. On the other hand, an air supply pipe 42 is provided at the bottom end of the heat sink 4. The fan 411 passes the air in the heat sink 4 into the cabin 1 through the ventilation pipe 41, which will generate negative pressure in the heat sink 4. The external air can be sucked into the heat sink 4 through the air supply pipe 42, that is, the gas is supplemented in the heat sink 4, and a filter bag is provided at the air inlet of the air supply pipe 42 for filtering and purifying the air entering the heat sink 4.

[0026] To sum up, the airflow carries low-temperature air and blows it in from the air inlet pipe 51 of the air duct assembly 5, and then blows it out from the air outlet pipe 52 of the air duct assembly 5. During the airflow flowing in the air duct assembly 5, heat exchange is performed in the heat sink 4, so that the temperature in the heat sink 4 is reduced. The other end of the ventilation pipe 41 extends into the cover 11, and a fan 411 is installed at one end of the ventilation pipe 41. The cold air in the heat sink 4 is passed into the cover 11 through the fan 411, which is used to cool the gear box, generator and other equipment in the cover 11, so as to utilize part of the wind energy of natural wind to keep the equipment at normal operating temperature.

[0027] In one embodiment of the present application, see Figure 1 or Figure 4 As shown, a deflector 511 is provided at the air inlet of the air inlet pipe 51 , and the pipe body of the air inlet pipe 51 is connected to a plurality of air outlet pipes 52 , and the air outlets of the air outlet pipes 52 are provided outside the heat dissipation box 4 .

[0028] In the above embodiment, the direction of the air deflector 511 is consistent with the direction of the fan blades, that is, the air deflector 511 is facing the direction of large air volume. The air deflector 511 has a trumpet-shaped, funnel-shaped expansion structure, so that the inlet cross-section of the air deflector 511 is larger than the inlet diameter of the air inlet pipe 51, which plays a collecting effect and is used to capture the flow of air in a larger range. The pipe body of the air inlet pipe 51 is connected to multiple air outlet pipes 52, which are used to increase the exhaust speed of the air outlet pipe 52. The flow of external air in the pipeline is increased, which is beneficial to improving the heat exchange efficiency of the air duct assembly 5 in the heat sink 4.

[0029] In one embodiment of the present application, see Figure 2 As shown, a plurality of first fins 512 are provided on the tube body of the air inlet pipe 51 .

[0030] In the above embodiment, multiple first fins 512 are arranged in an array perpendicular to the axial direction of the air inlet pipe 51, which is used to increase the heat exchange area of ​​the air inlet pipe 51 in the heat sink 4, so as to improve the heat exchange efficiency of the air in the air inlet pipe 51 in the heat sink 4, which is beneficial to the rapid reduction of the temperature in the heat sink 4.

[0031] In one embodiment of the present application, see Figure 4 As shown, the end of the vent pipe 41 extending into the housing 11 is connected to the hole-discharging pipe 412 , and the hole-discharging pipe 412 is provided with a plurality of air holes facing the generator equipment.

[0032] In the above embodiment, the vent pipe 41 is connected to the perforated pipe 412, and the multiple air holes on the perforated pipe 412 are oriented toward the generator equipment. By arranging the multiple air holes on the perforated pipe 412, cooling air can be precisely blown to the key heating areas of the generator equipment, such as the gear meshing area, to specifically reduce the temperature of the mechanical friction hotspot. By blowing air through the air holes to cool the key heating areas of the generator, it is ensured that all parts of the generator operate at normal temperatures, which is beneficial to improving the operating stability of the generator set.

[0033] In one embodiment of the present application, see Figure 3 As shown, an electrical box 43 is provided in the heat dissipation box 4.

[0034] In the above embodiment, high-heating electrical equipment (such as inverters and transformers) are installed in the electrical box 43. The electrical box 43 is used to provide installation points for heating electrical appliances. By installing the heating electrical appliances in the heat dissipation box 4, on the one hand, the shell of the heat dissipation box 4 can be used to protect the electrical accessories and prevent erosion and damage from harsh natural environments such as wind and sand, rain and snow, salt fog, hail, and ultraviolet radiation. On the other hand, the key heat sources such as inverters and transformers are concentrated in the heat dissipation box 4, which can maximize the use of the heat exchange space in the heat dissipation box 4 and avoid the equipment redundancy and cooling efficiency loss caused by decentralized heat dissipation. That is, the air duct assembly 5 is arranged in the heat dissipation box. 4 for heat exchange to reduce the temperature in the heat sink 4, and at the same time, the generator assembly in the cabin 1 and the heating appliances in the heat sink 4 can be cooled and lowered. At the same time, the electrical box 43, i.e., the installation point of the heating appliances, is arranged above the air supply pipe 42. When the outside air is sucked into the heat sink 4 through the negative pressure in the box, the outside low-temperature air flows through the heating appliances for heat exchange, and the air then flows through the air duct assembly 5 on the upper part of the heat sink 4 for heat exchange to reduce the temperature, and then the fan 411 is blown into the cabin 1 through the ventilation pipe 41 for cooling, so as to realize cooling and lowering the temperature of the generator and heating appliances of the wind turbine set respectively through the heat sink 4, which is beneficial to improving the utilization efficiency of the cooling equipment.

[0035] In one embodiment of the present application, a plurality of second fins are provided on the outer wall of the electrical box 43 .

[0036] In the above embodiment, the outer wall of the electrical box 43 is provided with a plurality of second fins for increasing the heat exchange area of ​​the electrical box 43 in the heat dissipation box 4 , thereby being beneficial to improving the heat dissipation efficiency of the heat-generating electrical appliances in the electrical box 43 .

[0037] In one embodiment of the present application, see Figure 6 As shown, the outer wall of the heat dissipation box 4 is provided with a sound insulation layer 44 .

[0038] In the above embodiment, when the airflow passes through the air duct assembly 5 or flows rapidly within the heat sink 4, it will generate airflow disturbances or the airflow will cause the pipe wall and the box wall to vibrate, thereby generating noise. Because the heat sink 4 is located at a certain height above the ground and there is no obstruction to block the noise, the noise will propagate far and cause noise pollution to the surrounding environment. The sound insulation layer 44 provided on the outer wall of the heat sink 4 is used to isolate the airflow noise generated within the heat sink 4 to avoid noise pollution to the surrounding environment. Optionally, the sound insulation layer 44 is entirely covered with a polyester fiber waterproof and breathable membrane to prevent rainwater penetration while releasing internal moisture to prevent condensation corrosion on the metal box, or it can be covered with wear-resistant nylon cloth to resist erosion by wind and sand particles.

[0039] In one embodiment of the present application, see Figure 1 As shown, a plurality of pillars 21 are provided at the bottom of the tower tube 2 for cooperating with the wind power foundation.

[0040] In the above embodiment, multiple pillars 21 are provided at the bottom of the tower tube 2 for supporting the tower tube 2 at multiple angles at the bottom end of the tower tube 2, thereby improving the stability of the tower tube 2. This, in turn, helps to improve the stability of the heat sink 4 installed on the first support plate 3 on the tower tube 2, thereby improving the operational stability of the heat sink 4. In addition, the multiple pillars 21 are used to cooperate with the casting of the concrete wind turbine foundation, further improving the stability of the tower tube 2 installation.

[0041] In one embodiment of the present application, see Figure 1 As shown, a counterweight block 31 is provided on the first support plate 3 .

[0042] In the above embodiment, the heat sink 4 is arranged at one end of the first support plate 3, and a counterweight block 31 is provided on the upper part of the other end of the first support plate 3 to balance the weight of the heat sink 4 on the first support plate 3 to prevent the first support plate 3 from tilting due to uneven force, thereby improving the stability of the installation of the heat sink 4.

[0043] In one embodiment of the present application, a temperature detection device is provided in the nacelle 1 , the temperature detection device is electrically connected to a controller, and the controller is electrically connected to the fan 411 .

[0044] In the above embodiment, the temperature detection device is used to convert the temperature value in the cabin 1 into an electrical signal and transmit it to the controller, MCU or single-chip microcomputer. For example, when the temperature in the cabin 1 is lower than 20°, there is no need to cool the cabin 1. Therefore, when the temperature in the cabin 1 is lower than 20°, the controller controls the fan 411 to stop running, which can be used to save energy consumption of the fan 411. Similarly, when the temperature in the cabin 1 is higher than 20°, the controller controls the fan 411 to run to cool the cabin 1.

[0045] During the actual use of this application: a generator set is provided in the nacelle 1, and a cover 11 is provided on the outside of the nacelle 1. The cover 11 is used to protect the gearbox, generator and other equipment inside the nacelle 1. The generator set is connected to the fan blades outside the cover 11. A tower pipe 2 is connected to the lower part of the nacelle 1 to support the nacelle 1, and a plurality of pillars 21 are provided at the bottom of the tower pipe 2 to support the tower pipe 2 at multiple angles at the bottom of the tower pipe 2. The plurality of pillars 21 can be used to cooperate with the casting of the concrete wind power foundation to improve the stability of the tower pipe 2. A first support plate 3 is provided on the tower pipe 2. A heat dissipation component is provided on the upper end of the first support plate 3 to cool and dissipate heat from the operating equipment in the nacelle 1. The heat dissipation component includes a heat dissipation box 4. The heat dissipation box 4 is provided at one end of the first support plate 3. A counterweight block 31 is provided on the upper part of the other end of the first support plate 3 to balance the weight of the heat dissipation box 4 on the first support plate 3 to prevent the first support plate 3 from tilting due to uneven force. The heat sink 4 is made of aluminum alloy or galvanized steel plate by welding / stamping, and a duct assembly 5 is installed at the upper end of the interior of the heat sink 4. The duct assembly 5 includes an air inlet pipe 51 and an air outlet pipe 52, and the heat sink 4 is connected to one end of the ventilation pipe 41, and the other end of the ventilation pipe 41 extends into the cover 11. The wind turbine is usually set in a windy area, and the air flow carries low-temperature air and blows in from the air inlet pipe 51 of the air duct assembly 5. The direction of the air guide 511 is consistent with the direction of the fan blade, that is, the air guide 511 is facing the direction of large wind volume. The air guide 511 has a trumpet-shaped, funnel-shaped expansion structure, so that the inlet cross-section of the air guide 511 is larger than the air inlet diameter of the air inlet pipe 51, which plays a collecting effect, and then blows out from the air outlet pipe 52 of the air duct assembly 5. During the flow of the air flow in the air duct assembly 5, heat exchange is performed in the heat sink 4, so that the temperature in the heat sink 4 is reduced. Furthermore, the external airflow exchanges heat with the heat sink 4 through the air duct assembly 5, so that the heat sink 4 does not come into direct contact with the external airflow, preventing sand and dust impurities carried by the external airflow from entering the heat sink 4, thereby improving the cleanliness of the air in the heat sink 4. The heat sink 4 is also provided with an electrical box 43, and high-heat-generating electrical equipment is installed in the electrical box 4. By installing the heat-generating electrical equipment in the heat sink 4, on the one hand, the shell of the heat sink 4 can be used to protect the electrical accessories from erosion and damage by harsh natural environments such as wind and sand, rain and snow, salt fog, hail, and ultraviolet radiation. On the other hand, by centrally arranging key heat sources such as inverters and transformers in the heat sink 4, the heat exchange space in the heat sink 4 can be maximized, avoiding equipment redundancy and cooling efficiency loss caused by decentralized heat dissipation. That is, heat exchange is carried out in the heat sink 4 through the air duct assembly 5 to reduce the temperature in the heat sink 4, and at the same time, the generator assembly in the nacelle 1 and the heat-generating electrical equipment in the heat sink 4 can be cooled.Furthermore, the other end of the vent pipe 41 extends into the housing 11, and the end of the vent pipe 41 extending into the housing 11 is connected to the perforated pipe 412, which is provided with a plurality of air holes facing the generator equipment. A fan 411 is installed at one end of the vent pipe 41, and the cool air in the heat sink 4 is passed into the housing 11 through the fan 411, which is used to cool down the gear box, generator and other equipment in the housing 11, so that the equipment is kept at a normal operating temperature. By arranging the multiple air holes on the perforated pipe 412, the cooling air can be blown precisely to the key heating areas of the generator equipment, such as the gear meshing area, to specifically reduce the temperature of the mechanical friction hot spot, and to precisely cool down the key heating areas of the generator by blowing air through the air holes. In addition, the air in the heat sink 4 does not come into direct contact with the outside, which prevents impurities in the air from being blown into the nacelle 1 and causing equipment pollution. For example, sand and dust will wear the bearing gears, affecting the transmission efficiency of the generator, and thus affecting the power generation efficiency of the wind turbine. Furthermore, an exhaust hole 111 is provided at the rear end of the cover 11. After the cooling air blown in by the ventilation pipe 41 exchanges heat with the equipment in the cabin 1, the temperature of the equipment is reduced and discharged from the cabin 1 through the exhaust hole 111 to maintain the air pressure balance in the cabin 1. On the other hand, an air supply pipe 42 is provided at the bottom end of the heat sink 4. The fan 411 passes the air in the heat sink 4 into the cabin 1 through the ventilation pipe 41, which will generate negative pressure in the heat sink 4. The outside air can be sucked into the heat sink 4 through the air supply pipe 42, that is, the heat sink 4 is replenished with gas, and the air inlet of the air supply pipe 42 is provided with a A filter bag is provided for filtering and purifying the air entering the heat sink 4. The electrical box 43, i.e., the installation point of the heating appliance, is arranged above the air supply pipe 42. When the outside air is sucked into the heat sink 4 by the negative pressure in the box, the outside low-temperature air flows through the heating appliance for heat exchange. The air then flows through the air duct assembly 5 on the upper part of the heat sink 4 for heat exchange and temperature reduction. The air is then blown into the cabin 1 through the ventilation pipe 41 by the fan 411 for cooling. This realizes cooling of the generator and the heating appliance of the wind turbine through the heat sink 4, which is beneficial to improving the efficiency of the cooling equipment. In addition, the outer wall of the heat sink 4 is provided with a sound insulation layer 44 for isolating the air flow noise generated in the heat sink 4 to avoid noise pollution to the surrounding environment. Optionally, the sound insulation layer 44 is entirely covered with a polyester fiber waterproof and breathable membrane to block rainwater penetration while releasing internal water vapor to avoid condensation corrosion of the metal box. Alternatively, the sound insulation layer 44 can be covered with wear-resistant nylon cloth to resist erosion by wind and sand particles.

[0046] The wind turbine cooling system disclosed in the present application is applicable to small and medium-sized wind turbines. Wind turbines with a power of 1 to 10 kW are small wind turbines, and wind turbines with a power of 10 to 100 kW are medium-sized wind turbines.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some or all of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A wind turbine cooling system, characterized in that: The invention comprises a cabin (1), wherein a generator set is arranged in the cabin (1), a cover (11) is arranged outside the cabin (1), the generator set is connected to the fan blades outside the cover (11), the lower part of the cabin (1) is connected to a tower tube (2), a first support plate (3) is arranged on the tower tube (2), a heat dissipation component is arranged on the upper end of the first support plate (3), the heat dissipation component comprises a heat dissipation box (4), and a duct assembly (5) is installed on the upper end of the heat dissipation box (4). The air duct assembly (5) includes an air inlet pipe (51) and an air outlet pipe (52); the upper end of the heat dissipation box (4) is connected to one end of a ventilation pipe (41); the other end of the ventilation pipe (41) extends into the housing (11); the rear end of the housing (11) is provided with an exhaust hole (111); one end of the ventilation pipe (41) is installed with a fan (411); the bottom end of the heat dissipation box (4) is provided with an air supply pipe (42); a filter bag is provided at the air inlet of the air supply pipe (42).

2. The wind turbine cooling system according to claim 1, characterized in that: A deflector (511) is provided at the air inlet of the air inlet pipe (51), a plurality of air outlet pipes (52) are connected to the pipe body of the air inlet pipe (51), and the air outlets of the air outlet pipes (52) are provided outside the heat dissipation box (4).

3. The wind turbine cooling system according to claim 2, characterized in that: A plurality of first fins (512) are provided on the tube body of the air inlet tube (51).

4. The wind turbine cooling system according to claim 1, characterized in that: The end of the vent pipe (41) extending into the housing (11) is connected to the hole-discharging pipe (412), and the hole-discharging pipe (412) is provided with a plurality of air holes facing the generator equipment.

5. The wind turbine cooling system according to claim 1, characterized in that: An electrical box (43) is provided in the heat dissipation box (4).

6. The wind turbine cooling system according to claim 5, characterized in that: A plurality of second fins are provided on the outside of the electrical box (43).

7. The wind turbine cooling system according to claim 1, characterized in that: The outer wall of the heat dissipation box (4) is provided with a sound insulation layer (44).

8. The wind turbine cooling system according to claim 1, characterized in that: A plurality of pillars (21) are provided at the bottom of the tower tube (2) for cooperating with a wind power foundation.

9. The wind turbine cooling system according to claim 8, characterized in that: A counterweight (31) is provided on the first support plate (3).

10. The wind turbine cooling system according to any one of claims 1 to 9, characterized in that: A temperature detection device is provided in the cabin (1), the temperature detection device is electrically connected to a controller, and the controller is electrically connected to the fan (411).

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