Wind turbine, heat exchange device, heat dissipation system and nacelle cover

Abstract

The application discloses a wind generating set, a heat exchange device, a heat dissipation system and a nacelle cover. The wind generating set comprises the nacelle cover, the nacelle cover has a first air inlet and a first air outlet, the heat exchange device is arranged in the nacelle cover, a shell has a first cavity, a second cavity, a second air inlet, a second air outlet and an avoiding hole, the second air inlet is located on an inner wall of the first cavity, the second air outlet is located on an inner wall of the second cavity, a heat exchange element is connected to the shell and has an outer circulation channel and an inner circulation channel, the outer circulation channel is communicated with the first air inlet and the first air outlet, and the inner circulation channel is communicated with the second air outlet and the second air inlet; a transformer is arranged in the avoiding hole; in a first direction intersecting with an axial direction of the avoiding hole, the first air inlet and the first air outlet are arranged on a side of the heat exchange element, which is away from the shell. According to the embodiment of the application, an air-air heat exchange scheme can be provided, the risk of water cooling system leakage can be avoided, and the reliability of the wind generating set can be ensured.

Description

Technical Field

[0001] This application relates to the field of wind power generation technology, and in particular to a wind turbine generator set, heat exchange device, heat dissipation system and nacelle cover. Background Technology

[0002] As wind turbine generators become increasingly larger, their safety and reliability are receiving more and more attention. Wind power transformers, in particular, are used in wind turbine generators for voltage step-up, voltage step-down, or electrical isolation; therefore, the reliability of wind power transformers directly affects the reliability of wind turbine generators.

[0003] In related technologies, wind power transformers can be divided into dry-type transformers and oil-type transformers. Oil-type transformers use oil-water-air heat exchange or oil-air heat exchange, while dry-type transformers use air-direct cooling, air-water-air, or air-water-oil heat exchange schemes. Due to the special environment of wind turbine generators, such as offshore wind turbine generators, atmospheric corrosion in the marine environment needs to be considered. Therefore, dry-type transformers mostly use air-water-air heat exchange schemes.

[0004] However, the water cooling system involved in the air-water-air heat exchange scheme has the risk of water leakage, which affects the heat dissipation effect and poses a risk of electric shock, thereby affecting the reliability of the wind turbine generator. Utility Model Content

[0005] This application provides a wind turbine generator set, a heat exchange device, a heat dissipation system, and a nacelle cover, which can provide an air-to-air heat exchange solution without the need for a water cooling system. This avoids heat dissipation failure and electric shock risks caused by water cooling system leaks, and ensures the reliability of the wind turbine generator set.

[0006] In a first aspect, embodiments of this application provide a wind turbine generator set, including: a nacelle cover having a first air inlet and a first air outlet; a heat exchange device disposed inside the nacelle cover, the heat exchange device including a shell, a heat exchange component, and a power source, the shell having a first cavity, a second cavity, a second air inlet, a second air outlet, and a clearance hole connecting the first cavity and the second cavity, the second air inlet being located on the inner wall of the shell enclosing the first cavity, the second air outlet being located on the inner wall of the shell enclosing the second cavity, the heat exchange component being connected to the outer wall of the shell and having an external circulation channel and an internal circulation channel that cooperate in heat exchange, the inlet of the external circulation channel being connected to the first air inlet and... The outlet is connected to the first air outlet, the inlet of the inner circulation channel is connected to the second air outlet and the outlet is connected to the second air inlet, and the power source is used to drive the fluid in the outer circulation channel to flow from the inlet to the outlet, and to drive the fluid in the inner circulation channel to flow from the inlet to the outlet; the transformer is disposed in at least one of the first cavity and the second cavity, the winding and core assembly of the transformer are passed through the clearance hole, the winding and core assembly have heat dissipation channels, and the two ends of the heat dissipation channels are respectively connected to the first cavity and the second cavity; wherein, in the first direction intersecting the axial direction of the clearance hole, the first air inlet and the first air outlet are both disposed on the side of the heat exchanger away from the shell.

[0007] In some embodiments, the nacelle includes a windward plate and a leeward tail plate disposed opposite each other in a first direction, and a top plate and a bottom plate disposed opposite each other in an axial direction, wherein a first air inlet and a first air outlet are both disposed on the leeward tail plate.

[0008] In some embodiments, the leeward tail plate gradually tilts towards the windward plate in the axial direction from the top plate to the bottom plate; and / or, in the axial direction, the second air outlet is located on the side of the second air inlet facing the bottom plate.

[0009] In some embodiments, the heat exchanger includes: a heat exchanger connected to the housing, the heat exchanger having a first flow channel and a second flow channel, the inlet of the first flow channel being connected to a second air outlet, and the outlet of the first flow channel being connected to a second air inlet; an external circulation inlet pipe connecting the inlet of the first flow channel and the first air inlet, wherein in a first direction, one end of the external circulation inlet pipe away from the housing is connected to a leeward tail plate; and an external circulation outlet pipe connecting the outlet of the first flow channel and the first air outlet, wherein in a first direction, one end of the external circulation inlet pipe away from the housing is connected to a leeward tail plate.

[0010] In some embodiments, along the axial direction from the top plate to the bottom plate, the end face of the external circulation inlet pipe away from the heat exchanger gradually approaches the windward plate and the end face of the external circulation outlet pipe away from the heat exchanger gradually approaches the windward plate.

[0011] In some embodiments, the heat exchanger further includes: a first flexible tube, the second flow channel and the external circulation outlet pipe being connected through the first flexible tube; and a second flexible tube, the second flow channel and the external circulation inlet pipe being connected through the second flexible tube.

[0012] In some embodiments, the nacelle cover further includes: an air inlet cap and an air outlet cap, disposed on the side of the leeward tail plate away from the windward side plate, the air inlet cap covering the second air inlet, and the air outlet cap covering the second air outlet, the openings of the air inlet cap and the air outlet cap both facing the bottom plate, and in the direction from the windward side plate to the leeward tail plate along the first direction, the distance between the plane where the opening of the air inlet cap is located and the top plate in the axial direction of the clearance hole gradually increases, and the distance between the plane where the opening of the air outlet cap is located and the top plate in the axial direction of the clearance hole gradually increases; and / or, a reinforcing rib, disposed on the side of the leeward tail plate facing the windward side plate, at least a portion of the structure of the reinforcing rib surrounding the outside of the first air outlet and the first air outlet; and / or, a first bird net and a second bird net, connected to the leeward tail plate, the first bird net covering the second air inlet, and the second bird net covering the second air outlet.

[0013] In some embodiments, the heat exchange device further includes: a third flexible tube and a fourth flexible tube, wherein the inlet of the internal circulation channel is connected to the second air outlet through the third flexible tube, and the outlet of the internal circulation channel is connected to the second air inlet through the fourth flexible tube; and / or, a protective net is provided on the second air inlet and connected to the housing.

[0014] In some embodiments, the housing includes an outer shell and a heat exchange bracket, the heat exchange bracket being connected to the outside of the outer shell and located on one side of the outer shell in a first direction, the heat exchange element being detachably connected to the heat exchange bracket, and the first cavity, the second cavity, the clearance hole, the second air inlet, and the second air outlet are all disposed on the outer shell.

[0015] In some embodiments, the heat exchange bracket includes a heat exchange platform detachably connected to the housing, and a heat exchange element disposed on one side of the heat exchange platform in the axial direction of the clearance hole. The heat exchange bracket further includes: a tie rod connected to the housing and the heat exchange platform respectively; and / or a connecting beam located on the side of the heat exchange element facing away from the heat exchange platform in the axial direction of the clearance hole, the connecting beam being connected to the housing and the heat exchange element respectively.

[0016] In some embodiments, in the first direction, both the second air inlet and the second air outlet are disposed on the side of the housing facing the heat exchanger; and / or, the end of the heat dissipation channel facing the second cavity is flush with the end of the clearance hole facing the second cavity.

[0017] Secondly, embodiments of this application provide a heat exchange device, comprising: a shell having a first cavity, a second cavity, a second air inlet, a second air outlet, and a clearance hole connecting the first cavity and the second cavity, the clearance hole being used for the passage of a transformer winding and core assembly, the second air inlet being located on the inner wall of the shell enclosing the first cavity, and the second air outlet being located on the inner wall of the shell enclosing the second cavity; a heat exchange component connected to the outer wall of the shell and having an external circulation channel and an internal circulation channel that cooperate with each other in heat exchange, the inlet of the internal circulation channel being connected to the second air outlet and the outlet being connected to the second air inlet; and a power source for driving fluid in the external circulation channel to flow from the inlet to the outlet, and driving fluid in the internal circulation channel to flow from the inlet to the outlet; wherein, in a first direction intersecting the axial direction of the clearance hole, the inlet and outlet of the external circulation channel are both located on the side of the heat exchange component away from the shell.

[0018] In some embodiments, the housing has a top end and a bottom end, and the heat exchanger includes: a heat exchanger connected to the housing, the heat exchanger having a first flow channel and a second flow channel, the inlet of the first flow channel communicating with a second air outlet, and the outlet of the first flow channel communicating with a second air inlet; an external circulation inlet pipe communicating with the inlet of the first flow channel; and an external circulation outlet pipe communicating with the outlet of the first flow channel; wherein, in the direction from the top end to the bottom end along the axial direction of the clearance hole, the end face of the external circulation inlet pipe facing away from the heat exchanger gradually slopes towards the housing, and the end face of the external circulation outlet pipe facing away from the heat exchanger gradually slopes towards the housing; and / or, in the direction from the top end to the bottom end along the axial direction of the clearance hole, the size of the external circulation inlet pipe gradually decreases in the first direction, and the size of the external circulation outlet pipe gradually decreases in the first direction.

[0019] In some embodiments, the second air outlet is located on the side of the second air inlet facing the bottom end in the axial direction of the clearance hole.

[0020] Thirdly, embodiments of this application provide a heat dissipation system, including: the heat exchange device provided above; a temperature measuring component disposed on the housing, the temperature measuring component being used to acquire the temperature inside the first cavity and the second cavity; and a controller being communicatively connected to the temperature measuring component and the heat exchange component, the controller being used to control the power source to operate according to the detection result of the temperature measuring component.

[0021] In some embodiments, the heat dissipation system further includes: an abnormal operation detection component, which is communicatively connected to the power source to obtain at least one of the number of start-stop cycles of the power source, the loop current of the power source, and the operation feedback of the power source; a controller is communicatively connected to the abnormal operation detection component and is further configured to issue an alarm signal based on the detection result of the abnormal operation detection component; and / or, the controller is communicatively connected to a temperature sensing component and is further configured to issue an alarm signal based on the detection result of the temperature sensing component.

[0022] Fourthly, this application provides a nacelle canopy, which includes a windward plate and a leeward tail plate arranged opposite to each other, as well as a top plate and a bottom plate arranged opposite to each other. The relative directions of the top plate and the bottom plate are set at an angle to the relative directions of the windward plate and the leeward tail plate. The windward plate, the leeward tail plate, the top plate, and the bottom plate enclose a mounting cavity, which is used to install the heat exchange device provided above. The leeward tail plate is provided with a first air inlet and a first air outlet. In the direction from the top plate to the bottom plate, the leeward tail plate gradually tilts closer to the windward plate.

[0023] In some embodiments, the nacelle cover further includes an air inlet cap and an air outlet cap disposed on the outside of the leeward tail plate. The air inlet cap covers the second air inlet, and the air outlet cap covers the second air outlet. The openings of the air inlet cap and the air outlet cap are both axially oriented towards the bottom plate. In the direction in which the top plate and the bottom plate are disposed opposite each other, the distance between the plane where the opening of the air inlet cap is located and the top plate is L1, and the distance between the plane where the opening of the air outlet cap is located and the top plate is L2. Both L1 and L2 gradually increase in the direction from the windward plate to the leeward tail plate.

[0024] This application provides a wind turbine generator set, which includes a nacelle, a heat exchange device, and a transformer. The power source provides power for airflow in an external circulation channel and an internal circulation channel. Outside air enters the external circulation channel through a first air inlet, and air from the second cavity enters the internal circulation channel. The air in the internal circulation channel and the air in the external circulation channel exchange heat in the heat exchanger, thereby cooling the air in the internal circulation channel using outside air. Then, the heat-exchanged air in the external circulation channel is discharged to the outside through an air outlet, and the heat-exchanged air in the internal circulation channel enters the first cavity. The temperature of the air entering the first cavity from the internal circulation channel is lower than that entering from the second cavity. The air temperature in the internal circulation channel is controlled by the clearance hole connecting the first and second cavities. The winding and core assembly pass through the clearance hole, and the two ends of the heat dissipation channel of the winding and core assembly are connected to the first and second cavities respectively. The power source can also indirectly provide power for the air to flow from the first cavity into the second cavity through the heat dissipation channel. When the air flows from the second cavity into the first cavity through the heat dissipation channel, it can contact the winding and core assembly, so that the air in the first and second cavities can carry away the heat of the winding and core assembly, and dissipate the heat to the outside through the heat exchanger. No water cooling system is required, avoiding the risk of heat dissipation failure and electric shock caused by water cooling system leakage, thus improving the reliability of the wind turbine generator set. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a partial structural diagram of a wind turbine generator set according to some embodiments of this application;

[0027] Figure 2 This illustration shows a structural schematic diagram of the cabin canopy according to one embodiment of the present application from one perspective;

[0028] Figure 3 This invention provides a schematic diagram of the structure of a cabin canopy according to one embodiment of the present application from another perspective.

[0029] Figure 4 This illustration shows a schematic diagram of the transformer and heat dissipation device according to an embodiment of the present application from one perspective;

[0030] Figure 5 This invention provides a schematic diagram of the structure of a transformer and a heat dissipation device according to one embodiment of the present application from another perspective.

[0031] Figure 6 This diagram illustrates the structure of a heat exchanger, power source, third flexible tube, fourth flexible tube, and protective net according to an embodiment of this application from one perspective.

[0032] Figure 7 The diagram shows a heat exchanger, power source, third flexible tube, fourth flexible tube, and protective net from another perspective, representing one embodiment of this application.

[0033] The above figures include the following reference numerals:

[0034] 10. Cabin canopy; 11. First air inlet; 12. First air outlet; 14. Tail flap; 15. Top plate; 171. Air inlet cap; 172. Air outlet cap; 18. Reinforcing rib; 181. First reinforcing rib; 1811. First reinforcing rib; 1812. Second reinforcing rib; 1813. Third reinforcing rib; 182. Second reinforcing rib; 1821. Fourth reinforcing rib; 1822. Fifth reinforcing rib; 1823. Sixth reinforcing rib; 191. First bird net; 192. Second bird net;

[0035] 20. Heat exchanger; 21. Shell; 211. First cavity; 212. Second cavity; 213. Second air inlet; 214. Second air outlet; 215. Clearance hole; 216. Outer shell; 217. Heat exchange bracket; 2171. Heat exchange platform; 2172. Diagonal brace; 2173. Connecting beam; 22. Heat exchange component; 221. Heat exchanger; 222. External circulation inlet pipe; 223. External circulation outlet pipe; 224. First flexible pipe; 225. Second flexible pipe; 23. Power source; 231. First fan; 232. Second fan; 24. Third flexible pipe; 25. Fourth flexible pipe; 26. Protective net; 27. Top end; 28. Bottom end;

[0036] 30. Transformer; 31. Winding and core assembly; 311. Heat dissipation channel;

[0037] Z, axial direction; X, primary direction; Y, secondary direction;

[0038] A1. The angle between the leeward tailplate and the axial direction of the clearance hole;

[0039] A2. The angle between the relative directions of the top and bottom plates and the leeward tail plate. Detailed Implementation

[0040] The features and exemplary embodiments of various aspects of this application will be described in detail below. To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain this application and not to limit it. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this application by illustrating examples.

[0041] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes said element.

[0042] In related technologies, one cooling and heat dissipation method for dry-type transformers is to use direct air cooling heat exchange, which directly uses outside air as the cooling medium. The air from the outside environment is directly introduced into the heat exchange chamber and comes into direct contact with the object to be cooled inside the heat exchange chamber. After contact, the air absorbs the heat from the object to be cooled and rises in temperature before being discharged into the outside environment. However, considering the atmospheric corrosion of the marine environment, dry-type transformers using direct air cooling heat exchange schemes are at risk of being corroded by the cooling medium.

[0043] Some heat dissipation methods use air-water-air heat exchange and air-water-oil heat exchange, both of which use water as an intermediate medium and require two heat exchangers. One heat exchanger is used for heat exchange between the outside air and the water, with the outside air flowing through different channels of the heat exchanger to cool the intermediate medium, water. The other heat exchanger is used for heat exchange between the heat exchange chamber and the water, with the intermediate medium, water, flowing through different channels of the heat exchanger to cool the cooling medium in the heat exchange chamber. The cooling medium is in direct contact with the object to be cooled in the heat exchange chamber, thus cooling the object. In air-water-air heat exchange, the cooling medium in the heat exchange chamber is air, and in air-water-oil heat exchange, the cooling medium in the heat exchange chamber is oil.

[0044] Both air-water-air heat exchange and air-water-oil heat exchange require a water cooling system to enable water to flow between the two heat exchangers. However, the water cooling system in the relevant technology has the risk of water leakage. Once a water leakage occurs, it will affect the heat exchange effect between the two heat exchangers, and there is also the risk that water will enter the heat exchange chamber and come into direct contact with the object to be cooled, resulting in electric shock.

[0045] To address the problems of the prior art, embodiments of this application provide a wind turbine generator set, a heat exchange device, a heat dissipation system, and a nacelle cover. The wind turbine generator set provided in this application embodiment will be described below first.

[0046] like Figures 1 to 7As shown in the figure, this application provides a wind turbine generator set, which includes a nacelle cover 10, a heat exchange device 20, and a transformer 30. The nacelle cover 10 has a first air inlet 11 and a first air outlet 12. The heat exchange device 20 is disposed inside the nacelle cover 10 and includes a housing 21, a heat exchange component 22, and a power source 23. The housing 21 has a first cavity 211, a second cavity 212, a second air inlet 213, a second air outlet 214, and a clearance hole 215 connecting the first cavity 211 and the second cavity 212. The second air inlet 213 is located on the inner wall of the housing 21 enclosing the first cavity 211, and the second air outlet 214 is located on the inner wall of the housing 21 enclosing the second cavity. The inner wall of cavity 212 has a heat exchanger 22 connected to the outer wall of the shell 21, and has an external circulation channel and an internal circulation channel that cooperate with each other for heat exchange. The inlet of the external circulation channel is connected to the first air inlet 11 and the outlet is connected to the first air outlet 12. The inlet of the internal circulation channel is connected to the second air outlet 214 and the outlet is connected to the second air inlet 213. The power source 23 is used to drive the fluid in the external circulation channel to flow from the inlet to the outlet, and to drive the fluid in the internal circulation channel to flow from the inlet to the outlet. The transformer 30 is disposed in at least one of the first cavity 211 and the second cavity 212. The winding and core assembly 31 of the transformer 30 pass through the clearance hole 215. The winding and core assembly 31 have a heat dissipation channel 311, and the two ends of the heat dissipation channel 311 are connected to the first cavity 211 and the second cavity 212 respectively. In the first direction X, which intersects the axial direction Z of the clearance hole 215, the first air inlet 11 and the first air outlet 12 are both located on the side of the heat exchanger 22 away from the housing 21.

[0047] The wind turbine generator set provided in this embodiment includes a nacelle shroud 10, a heat exchange device 20, and a transformer 30. A power source 23 provides power for the airflow in the external and internal circulation channels. Outside air enters the external circulation channel through the first air inlet 11, and air from the second cavity 212 enters the internal circulation channel. The air in the internal circulation channel and the air in the external circulation channel exchange heat in the heat exchanger 22, thereby cooling the air in the internal circulation channel using outside air. Then, the heat-exchanged air in the external circulation channel is discharged to the outside through the air outlet, and the heat-exchanged air in the internal circulation channel enters the first cavity 211. The temperature of the air entering the first cavity 211 from the internal circulation channel is lower than the temperature of the air entering the internal circulation channel from the second cavity 212. Due to the clearance hole 21... The first cavity 211 and the second cavity 212 are connected. The winding and core assembly 31 are passed through the clearance hole 215. The two ends of the heat dissipation channel 311 of the winding and core assembly 31 are respectively connected to the first cavity 211 and the second cavity 212. The power source 23 can also indirectly provide power for the air to flow from the first cavity 211 into the second cavity 212 through the heat dissipation channel 311. When the air flows from the second cavity 212 into the first cavity 211 through the heat dissipation channel 311, it can contact the winding and core assembly 31 so that the air in the first cavity 211 and the second cavity 212 can carry away the heat of the winding and core assembly 31. The heat is then dissipated to the outside through the heat exchanger 22 without the need for a water cooling system. This avoids the risk of heat dissipation failure and electric shock caused by water cooling system leakage, and improves the reliability of the wind turbine generator set.

[0048] The outside air does not need to come into direct contact with the windings and core assembly 31, which can reduce the probability of corrosion of components such as the windings and core assembly 31.

[0049] By dividing the space inside the housing 21 into a first cavity 211 and a second cavity 212, it is possible to improve the full contact between air and the winding and core assembly 31 and the cooling performance.

[0050] In some embodiments, the housing 21 includes an outer shell 216 and a partition plate disposed within the outer shell 216. The partition plate divides the cavity within the outer shell 216 into a first cavity 211 and a second cavity 212. The partition plate may optionally be made of modified PC or PMMA, which is resistant to high temperatures and has high insulation and mechanical strength.

[0051] In some embodiments, the first air inlet 11 and the first air outlet 12 are spaced apart in the second direction Y, which intersects both the axial direction Z and the first direction X.

[0052] The first direction X can be the length direction of the nacelle, or the distribution direction of the nose and tail of the nacelle where the wheel hubs are installed. The second direction Y can be the width direction of the nacelle.

[0053] It should be noted that the heat exchanger 22 has an internal circulation channel and an external circulation channel that cooperate in heat exchange, which means that the internal circulation channel and the external circulation channel are isolated from each other and are not connected to each other. The fluid in the internal circulation channel and the fluid in the external circulation channel only transfer heat, which reduces the risk of outside air entering the first cavity 211 and the second cavity 212 and reduces the risk of outside air corroding the internal components of the first cavity 211 and the second cavity 212.

[0054] One set of internal circulation channels and one set of external circulation channels can be set up, and heat exchange can take place at the partition separating them. Of course, multiple sets of internal circulation channels and external circulation channels can also be set up and alternated, with adjacent internal circulation channels and external circulation channels exchanging heat at the partition separating them.

[0055] In some embodiments, the power source 23 includes components such as a fan and a motor that can provide power for gas flow.

[0056] In some embodiments, the power source 23 includes a first fan 231 and a second fan 232. The first fan 231 is disposed in the external circulation channel and drives the fluid in the external circulation channel to flow from the inlet to the outlet. The second fan 232 is disposed in the internal circulation channel and drives the fluid in the internal circulation channel to flow from the inlet to the outlet.

[0057] In some embodiments, the winding and core assembly 31 includes a core, an inner winding, and an outer winding. The inner winding is sleeved on the outside of the core, and the outer winding is sleeved on the outside of the inner winding. A heat dissipation channel 311 is disposed between the inner and outer windings, and there is a gap between the outer surface of the outer winding and the wall of the clearance hole 215. Air can also flow from the second cavity 212 into the first cavity 211 through the gap between the outer surface of the outer winding and the wall of the clearance hole 215, improving the contact effect between the air and the outer surface of the outer winding and improving the heat exchange effect. When air flows from the second cavity 212 into the first cavity 211 through the heat dissipation channel 311, it can improve the contact effect between the air and the outer surface of the inner winding, improve the contact effect between the air and the inner surface of the outer winding, and improve the heat exchange effect.

[0058] In some embodiments, the volume of the first cavity 211 is greater than the volume of the second cavity 212. Of course, in other embodiments, the volume of the first cavity 211 is equal to the volume of the second cavity 212. Of course, in other embodiments, the volume of the first cavity 211 is smaller than the volume of the second cavity 212.

[0059] like Figures 1 to 3 As shown, in some embodiments, the nacelle cover 10 includes a windward plate and a leeward tail plate 14 disposed opposite each other in the first direction X, and a top plate 15 and a bottom plate disposed opposite each other in the axial direction Z. The first air inlet 11 and the first air outlet 12 are both disposed on the leeward tail plate 14.

[0060] In some optional embodiments of this application, the first air inlet 11 and the first air outlet 12 are disposed on the leeward tail plate 14. When outside air enters the external circulation channel through the first air inlet 11 and the air in the external circulation channel is discharged to the outside through the first air outlet 12, the resistance of the ambient wind can be reduced.

[0061] like Figure 3 As shown, in some embodiments, the leeward tail plate 14 gradually tilts closer to the windward plate in the direction along the axial Z and from the top plate 15 to the bottom plate.

[0062] In some optional embodiments of this application, the inclined leeward tail plate 14 described above can reduce the probability of rainwater entering the external circulation channel through the first air inlet 11 and the first air outlet 12 under the action of gravity, thereby improving the water ingress prevention effect.

[0063] In some embodiments, the included angle between the leeward tail plate 14 and the axial direction Z is A1, where 8°≤A1≤12°.

[0064] Specifically, A1 can be 8°, 9°, 10°, 11°, 12°, or any value between 8° and 12°.

[0065] In some embodiments, in the axial direction Z, the second air outlet 214 is located on the side of the second air inlet 213 facing the bottom plate.

[0066] In some optional embodiments of this application, the second air inlet 213 and the second air outlet 214 arranged as described above allow air exchange between the first cavity 211 and the second cavity 212 and the internal circulation channel, resulting in the housing 21 having air entering from the top and exiting from the bottom, with cold air sinking. This improves airflow within the first cavity 211 and the second cavity 212 and enhances the heat exchange effect.

[0067] like Figures 1 to 7 As shown, in some embodiments, the heat exchanger 22 includes a heat exchanger 221, an external circulation inlet pipe 222, and an external circulation outlet pipe 223. The heat exchanger 221 is connected to the housing 21 and has a first flow channel and a second flow channel. The inlet of the first flow channel is connected to the second air outlet 214, and the outlet of the first flow channel is connected to the second air inlet 213. The external circulation inlet pipe 222 connects the inlet of the first flow channel and the first air inlet 11. In the first direction X, the end of the external circulation inlet pipe 222 facing away from the housing 21 is connected to the leeward tail plate 14. The external circulation outlet pipe 223 connects the outlet of the first flow channel and the first air outlet 12. In the first direction X, the end of the external circulation inlet pipe 222 facing away from the housing 21 is connected to the leeward tail plate 14.

[0068] In some optional embodiments of this application, outside air enters the external circulation inlet pipe 222 through the first air inlet 11, then passes through the second flow channel and the external circulation outlet pipe 223 in sequence and is discharged through the first air outlet 12. The air in the second cavity 212 enters the second flow channel through the second air outlet 214 and then enters the first cavity 211 through the second air inlet 213. The air in the first flow channel of the internal circulation channel and the air in the second flow channel exchange heat in the heat exchanger 221.

[0069] In some embodiments, the heat exchanger 221 includes a plurality of stacked heat exchange plates, with a flow channel formed between any two adjacent heat exchange plates, and the plurality of flow channels including a first flow channel and a second flow channel.

[0070] In some embodiments, along the stacking direction of the heat exchange fins, one of any two adjacent flow channels is a first flow channel and the other is a second flow channel.

[0071] In some embodiments, the fluid flow direction in the first flow channel is set at an angle to the fluid flow direction in the second flow channel, which can improve the heat dissipation effect of the heat exchanger 221 and reduce the volume ratio of the heat exchanger.

[0072] like Figure 6 and Figure 7 As shown, in some embodiments, along the axial direction Z from the top plate 15 to the bottom plate, the end face of the external circulation inlet pipe 222 away from the heat exchanger 221 gradually approaches the windward plate and the end face of the external circulation outlet pipe 223 away from the heat exchanger 221 gradually approaches the windward plate.

[0073] In some optional embodiments of this application, the above-mentioned inclined end faces are used to make the end faces of the external circulation inlet pipe 222 and the leeward tail plate 14 adaptable to the inclined leeward tail plate 14 when connecting the external circulation outlet pipe 223 and the leeward tail plate 14, which facilitates accurate connection.

[0074] like Figure 6 and Figure 7 As shown, in some embodiments, along the axial direction Z from the top plate 15 to the bottom plate, the size of the external circulation inlet pipe 222 gradually decreases in the first direction X, and the size of the external circulation outlet pipe 223 gradually decreases in the first direction X.

[0075] In some optional embodiments of this application, the external circulation outlet pipe 223 and external circulation inlet pipe 222 with the above-described structure can make the two end faces of the external circulation outlet pipe 223 adapt to the heat sink and the inclined leeward tail plate 14 respectively, and make the two end faces of the external circulation inlet pipe 222 adapt to the heat sink and the inclined leeward tail plate 14 respectively, which facilitates accurate connection.

[0076] like Figure 6 and Figure 7As shown, in some embodiments, the heat exchanger 22 further includes a first flexible tube 224 and a second flexible tube 225, with the second flow channel and the external circulation outlet pipe 223 connected through the first flexible tube 224. The second flow channel and the external circulation inlet pipe 222 are connected through the second flexible tube 225.

[0077] In some optional embodiments of this application, by providing a first flexible tube 224 and a second flexible tube 225, interface errors can be absorbed, and when the heat exchanger 221 vibrates relative to the nacelle cover 10, the first flexible tube 224 and the second flexible tube 225 can absorb vibration, reduce collision damage, and improve the connectivity reliability between the second flow channel and the external circulation outlet pipe 223.

[0078] In some embodiments, the first flexible pipe 224 is connected between the heat exchanger 221 and the external circulation outlet pipe 223 by bolts or other fasteners, and the external circulation outlet pipe 223 is connected to the nacelle cover 10 by bolts or other fasteners. The second flexible pipe 225 is connected between the heat exchanger 221 and the external circulation inlet pipe 222 by bolts or other fasteners, and the external circulation inlet pipe 222 is connected to the nacelle cover 10 by bolts or other fasteners.

[0079] In some embodiments, 316L steel wires are embedded in both the first flexible tube 224 and the second flexible tube 225 to improve the structural strength of the first flexible tube 224 and the second flexible tube 225.

[0080] like Figure 3 As shown, in some embodiments, the nacelle cover 10 further includes an air inlet cap 171 and an air outlet cap 172, which are disposed on the side of the leeward tail plate 14 away from the windward plate. The air inlet cap 171 covers the second air inlet 213, and the air outlet cap 172 covers the second air outlet 214. The openings of the air inlet cap 171 and the air outlet cap 172 are both oriented towards the bottom plate. In the direction along the first direction X from the windward plate to the leeward tail plate 14, the distance between the plane where the opening of the air inlet cap 171 is located and the top plate 15 in the axial direction Z of the clearance hole 215 gradually increases, and the distance between the plane where the opening of the air outlet cap 172 is located and the top plate 15 in the axial direction Z of the clearance hole 215 gradually increases.

[0081] In some optional embodiments of this application, by providing an air inlet cap 171 and an air outlet cap 172, with the air inlet cap 171 covering the second air inlet 213 and the air outlet cap 172 covering the second air outlet 214, since the openings of the air inlet cap 171 and the air outlet cap 172 are both facing the bottom plate, the probability of external rainwater entering the external circulation channel through the second air inlet 213 and the second air outlet 214 can be further reduced.

[0082] like Figure 2As shown, in some embodiments, the nacelle cover 10 further includes a reinforcing rib 18, which is disposed on the side of the leeward tail plate 14 facing the windward plate, and at least a portion of the structure of the reinforcing rib 18 surrounds the outside of the first air outlet 12 and the first air inlet 11.

[0083] In some optional embodiments of this application, by providing reinforcing ribs 18 on the leeward tail plate 14, since at least a portion of the structure of the reinforcing ribs 18 surrounds the outside of the first air outlet 12 and the first air inlet 11, the leeward tail plate 14 can be structurally strengthened, thereby improving the structural strength of the portion of the leeward tail plate 14 where the first air outlet 12 and the first air inlet 11 are located.

[0084] like Figure 2 As shown, in some embodiments, the reinforcing rib 18 includes a first reinforcing rib 181 and a second reinforcing rib 182, at least a portion of the structure of the first reinforcing rib 181 surrounds the outside of the first air inlet 11, and at least a portion of the structure of the second reinforcing rib 182 surrounds the outside of the first air outlet 12.

[0085] like Figure 2 As shown, in some embodiments, the first reinforcing rib 181 includes a first rib 1811, a second rib 1812, and a third rib 1813.

[0086] like Figure 2 As shown, in some embodiments, the second reinforcing rib 182 includes a fourth rib 1821, a fifth rib 1822, and a sixth rib 1823.

[0087] like Figure 2 As shown, in some embodiments, the nacelle cover 10 further includes a first bird net 191 and a second bird net 192, the first bird net 191 and the second bird net 192 are connected to the leeward tail plate 14, the first bird net 191 covers the second air inlet 213, and the second bird net 192 covers the second air outlet 214.

[0088] In some optional embodiments of this application, the probability of birds entering the external circulation channel through the second air inlet 213 and the second air outlet 214 can be reduced.

[0089] like Figure 6 and Figure 7 As shown, in some embodiments, the heat exchange device 20 further includes a third flexible tube 24 and a fourth flexible tube 25. The inlet of the internal circulation channel is connected to the second air outlet 214 through the third flexible tube 24, and the outlet of the internal circulation channel is connected to the second air inlet 213 through the fourth flexible tube 25.

[0090] In some optional embodiments of this application, by providing a third flexible tube 24 and a fourth flexible tube 25, when the heat exchanger 221 vibrates relative to the shell 21, the third flexible tube 24 and the fourth flexible tube 25 can absorb the vibration, reduce the collision damage between the inlet of the internal circulation channel and the second air outlet 214, and reduce the collision damage between the outlet of the internal circulation channel and the second air inlet 213.

[0091] In some embodiments, both the third flexible tube 24 and the fourth flexible tube 25 are embedded with SUS304 steel wires to improve the structural strength of the third flexible tube 24 and the fourth flexible tube 25.

[0092] like Figure 6 and Figure 7 As shown, in some embodiments, the heat exchange device 20 further includes a protective net 26, which covers the second air inlet 213 and is connected to the housing 21.

[0093] In some optional embodiments of this application, by covering the second air inlet 213 with the protective net 26 and connecting it to the housing 21, the probability of impurities in the air entering the housing 21 through the second air inlet 213 can be reduced, and the probability of broken fragments of the impeller of the power source 23 entering the housing 21 through the second air inlet 213 and causing damage to electrical components can be reduced.

[0094] In some embodiments, the third flexible tube 24 is connected between the heat exchanger 221 and the shell 21 by fasteners such as bolts, the fourth flexible tube 25 is connected between the heat exchanger 221 and the shell 21 by fasteners such as bolts, and the protective net 26 is sandwiched between the fourth flexible tube 25 and the shell 21.

[0095] like Figure 4 and Figure 5 As shown, in some embodiments, the housing 21 includes an outer shell 216 and a heat exchange bracket 217. The heat exchange bracket 217 is connected to the outside of the outer shell 216 and is located on one side of the outer shell 216 in the first direction X. The heat exchange component 22 is detachably connected to the heat exchange bracket 217. The first cavity 211, the second cavity 212, the clearance hole 215, the second air inlet 213, and the second air outlet 214 are all disposed on the outer shell 216.

[0096] In some optional embodiments of this application, the heat exchanger 22 is supported by the heat exchange bracket 217 to reduce the probability of vibration of the heat exchanger 22 and the probability of resonance between the power source 23 of the heat exchanger 22 and the transformer 30.

[0097] Furthermore, with the above-mentioned configuration, if the transformer 30 fails, the outer casing 216 and the heat exchange bracket 217 can be separated, thereby allowing the transformer 30 inside the outer casing 216 to be maintained separately.

[0098] In some embodiments, the housing 216 and the heat exchange bracket 217 are connected by fasteners such as bolts.

[0099] like Figure 4 and Figure 5 As shown, in some embodiments, the heat exchange bracket 217 includes a heat exchange platform 2171, which is detachably connected to the outer shell 216. The heat exchange component 22 is disposed on the side of the heat exchange platform 2171 on the axial Z side of the clearance hole 215. The heat exchange bracket 217 also includes a diagonal brace 2172, which is connected to the outer shell 216 and the heat exchange platform 2171 respectively.

[0100] In some optional embodiments of this application, the use of the inclined tie 2172 and the heat exchange platform 2171 together can increase the support strength and rigidity of the heat exchange bracket 217.

[0101] like Figure 4 and Figure 5 As shown, the diagonal bracing member 2172 includes diagonal bracing and triangular bracing.

[0102] In some embodiments, the heat exchanger 22 further includes a frame, and the heat exchanger 221 is disposed on the side of the frame away from the bottom wall. The frame is fixed to the side of the heat exchange platform 2171 away from the bottom wall using fasteners such as bolts.

[0103] like Figure 4 and Figure 5 As shown, in some embodiments, the heat exchange bracket 217 includes a heat exchange platform 2171, which is detachably connected to the housing 216. The heat exchanger 221 is disposed on one side of the heat exchange platform 2171 in the axial direction Z of the clearance hole 215. The heat exchange bracket 217 also includes a connecting beam 2173, which is located on the side of the heat exchanger 221 in the axial direction Z of the clearance hole 215 away from the heat exchange platform 2171. The connecting beam 2173 is connected to the housing 216 and the heat exchanger 221 respectively.

[0104] In some optional embodiments of this application, along the axial direction Z of the clearance hole 215, the two ends of the heat exchanger 221 are connected and fixed to the outer shell 216 through the heat exchange platform 2171 and the connecting beam 2173, respectively. This helps to improve the support effect of the heat exchange bracket 217 on the heat exchanger 221, further reduce the probability of vibration of the heat exchanger 221, and reduce the probability of resonance between the power source 23 of the heat exchanger 221 and the transformer 30.

[0105] like Figure 4 As shown, in some embodiments, in the first direction X, the second air inlet 213 and the second air outlet 214 are both disposed on the side of the housing 21 facing the heat exchanger 221.

[0106] In some optional embodiments of this application, the second air inlet 213 and the second air outlet 214 with the above-described layout can shorten the path for gas exchange between the heat exchanger 221 and the shell 21, resulting in a compact structure.

[0107] like Figure 4 and Figure 5 As shown, in some embodiments, the end of the heat dissipation channel 311 facing the second cavity 212 is flush with the end of the clearance hole 215 facing the second cavity 212.

[0108] In some optional embodiments of this application, since the end of the heat dissipation channel 311 facing the second cavity 212 is flush with the end of the clearance hole 215 facing the second cavity 212, it helps to reduce the volume of the second cavity 212 and increase the volume of the first cavity 211, thereby increasing the reserved cold air area inside the housing 21, which helps the cold air to fully exchange heat with the winding and iron core assembly 31.

[0109] It should be noted that each embodiment of the heat exchange device mentioned above and below in this application can be manufactured and sold as an independent product, and of course, it can also be used as a component of a wind turbine generator set.

[0110] like Figure 1 as well as Figures 4 to 7 As shown, another embodiment of this application provides a heat exchange device 20, which includes a housing 21, a heat exchange component 22, and a power source 23. The housing 21 has a first cavity 211, a second cavity 212, a second air inlet 213, a second air outlet 214, and a clearance hole 215 connecting the first cavity 211 and the second cavity 212. The clearance hole 215 is used for the windings and core assembly 31 of the transformer 30 to pass through. The second air inlet 213 is located on the inner wall of the housing 21 that encloses the first cavity 211, and the second air outlet 214 is located on the inner wall of the housing 21 that encloses the second cavity 212. The heat exchange component 22 is connected to the outer wall of the housing 21 and has an external circulation channel and an internal circulation channel that cooperate with each other for heat exchange. The inlet of the internal circulation channel is connected to the second air outlet 214, and the outlet is connected to the second air inlet 213. The power source 23 is used to drive the fluid in the external circulation channel to flow from the inlet to the outlet, and to drive the fluid in the internal circulation channel to flow from the inlet to the outlet. In the first direction X, which intersects the axial direction Z of the clearance hole 215, the inlet and outlet of the external circulation channel are both located on the side of the heat exchanger 22 away from the shell 21.

[0111] Using the heat exchange device 20 provided in this embodiment, the power source 23 can also provide power for the airflow in the external circulation channel and the internal circulation channel. Outside air enters the external circulation channel through the first air inlet 11, and the air in the second cavity 212 enters the internal circulation channel. The air in the internal circulation channel and the air in the external circulation channel exchange heat in the heat exchanger 22 to cool the air in the internal circulation channel using the outside air. Then, the heat-exchanged air in the external circulation channel is discharged to the outside through the air outlet, and the heat-exchanged air in the internal circulation channel enters the first cavity 211. The air entering the first cavity 211 from the internal circulation channel... The air temperature is lower than the air temperature entering the internal circulation channel from the second cavity 212. Since the clearance hole 215 connects the first cavity 211 and the second cavity 212, and since the clearance hole 215 is used to pass through the windings and core assembly 31 of the transformer 30, when the air flows from the first cavity 211 into the second cavity 212 through the clearance hole 215, it can contact the windings and core assembly 31. This allows the air in the first cavity 211 and the second cavity 212 to carry away the heat from the windings and core assembly 31, and dissipate the heat to the outside through the heat exchanger 22. This eliminates the need for a water cooling system, avoiding the risk of heat dissipation failure and electric shock due to water cooling system leakage.

[0112] like Figures 4 to 7 As shown, in some embodiments, the housing 21 has a top end 27 and a bottom end 28. The heat exchanger 22 includes a heat exchanger 221, an external circulation inlet pipe 222, and an external circulation outlet pipe 223. The heat exchanger 221 is connected to the housing 21 and has a first flow channel and a second flow channel. The inlet of the first flow channel is connected to a second air outlet 214, and the outlet of the first flow channel is connected to a second air inlet 213. The external circulation inlet pipe 222 is connected to the inlet of the first flow channel. The external circulation outlet pipe 223 is connected to the outlet of the first flow channel. Specifically, along the axial direction Z of the clearance hole 215 from the top end 27 to the bottom end 28, the end face of the external circulation inlet pipe 222 facing away from the heat exchanger 221 gradually slopes towards the housing 21, and the end face of the external circulation outlet pipe 223 facing away from the heat exchanger 221 gradually slopes towards the housing 21.

[0113] In some optional embodiments of this application, outside air enters the external circulation inlet pipe 222 through the first air inlet 11, then passes through the second flow channel and the external circulation outlet pipe 223 in sequence and is discharged through the first air outlet 12. The air in the second cavity 212 enters the second flow channel through the second air outlet 214 and then enters the first cavity 211 through the second air inlet 213. The air in the first flow channel of the internal circulation channel and the air in the second flow channel exchange heat in the heat exchanger 221.

[0114] Furthermore, along the axial direction Z of the clearance hole 215 from the top end 27 to the bottom end 28, the end face of the external circulation inlet pipe 222 facing away from the heat exchanger 221 gradually approaches the shell 21 and the end face of the external circulation outlet pipe 223 facing away from the heat exchanger 221 gradually approaches the shell 21 and is inclined. This can reduce the probability of rainwater entering the external circulation channel through the end of the external circulation inlet pipe 222 facing away from the heat exchanger 221 and the end of the external circulation outlet pipe 223 facing away from the heat exchanger 221 under the action of gravity, thereby improving the water ingress prevention effect.

[0115] like Figures 4 to 7 As shown, in some embodiments, in the direction from the top end 27 to the bottom end 28 along the axial direction Z of the clearance hole 215, the size of the external circulation inlet pipe 222 gradually decreases in the first direction X, and the size of the external circulation outlet pipe 223 gradually decreases in the first direction X.

[0116] In some optional embodiments of this application, the external circulation outlet pipe 223 and external circulation inlet pipe 222 with the above-described structure can make the two end faces of the external circulation outlet pipe 223 adapt to the heat sink and the inclined leeward tail plate 14 respectively, and make the two end faces of the external circulation inlet pipe 222 adapt to the heat sink and the inclined leeward tail plate 14 respectively, which facilitates accurate connection.

[0117] like Figure 4 As shown, in some embodiments, in the axial direction Z of the clearance hole 215, the second air outlet 214 is located on the side of the second air inlet 213 facing the bottom end 28.

[0118] In some optional embodiments of this application, the second air inlet 213 and the second air outlet 214 arranged as described above allow air exchange between the first cavity 211 and the second cavity 212 and the internal circulation channel, resulting in the housing 21 having air entering from the top and exiting from the bottom, with cold air sinking. This improves airflow within the first cavity 211 and the second cavity 212 and enhances the heat exchange effect.

[0119] It should be noted that the heat exchange device 20 provided in this application embodiment has the beneficial effects of the heat exchange device 20 of the wind turbine generator set in any of the foregoing embodiments. For details, please refer to the foregoing description of the beneficial effects of the heat exchange device 20 of the wind turbine generator set. This application embodiment will not repeat the description.

[0120] Another embodiment of this application provides a heat dissipation system, which includes the heat exchange device 20, temperature measuring component, and controller described above. The temperature measuring component is disposed on the housing 21 and is used to acquire the temperature in the first cavity 211 and the second cavity 212. The controller is communicatively connected to both the temperature measuring component and the heat exchanger 22, and is used to control the power source 23 to operate based on the detection results of the temperature measuring component.

[0121] The heat dissipation system provided in this embodiment can also utilize the power source 23 to provide power for the airflow in the external and internal circulation channels. Outside air enters the external circulation channel through the first air inlet 11, and air in the second cavity 212 enters the internal circulation channel. The air in the internal circulation channel and the air in the external circulation channel exchange heat in the heat exchanger 221, thereby using outside air to cool the air in the internal circulation channel. Then, the heat-exchanged air in the external circulation channel is discharged to the outside through the air outlet, and the heat-exchanged air in the internal circulation channel enters the first cavity 211. The air entering the first cavity 211 from the internal circulation channel... The temperature is lower than the air temperature entering the internal circulation channel from the second cavity 212. Since the clearance hole 215 connects the first cavity 211 and the second cavity 212, and since the clearance hole 215 is used to pass through the windings and core assembly 31 of the transformer 30, when air flows into the second cavity 212 from the first cavity 211 through the clearance hole 215, it can contact the windings and core assembly 31. The air in the first cavity 211 and the second cavity 212 can carry away the heat of the windings and core assembly 31, and dissipate the heat to the outside through the heat exchanger 221. No water cooling system is required, avoiding the risk of heat dissipation failure and electric shock caused by water cooling system leakage.

[0122] Furthermore, the above-mentioned setup utilizes a temperature sensing component to detect the temperature inside the first cavity 211 and the second cavity 212. When the highest temperature is greater than or equal to 80°C and lasts for 30 seconds, the controller controls the power source 23 to start working. When the highest temperature is less than or equal to 40°C and lasts for 60 seconds, the controller controls the power source 23 to stop working.

[0123] In some embodiments, the power source 23 includes one external circulation fan and two internal circulation fans. The external circulation fan is disposed in the external circulation channel and drives the fluid in the external circulation channel to flow from the inlet to the outlet. The internal circulation fans are disposed in the internal circulation channel and drive the fluid in the internal circulation channel to flow from the inlet to the outlet. When the controller controls the power source 23 to start working, one internal circulation fan is started first, then the other internal circulation fan is started, and finally the external circulation fan is started. The start interval is 15 seconds, and the running time after start-up is greater than or equal to 30 minutes.

[0124] In some embodiments, when the power source 23 is in the start-up state, if the maximum temperature is greater than or equal to 150°C, the controller issues an over-temperature warning; if the maximum temperature is greater than or equal to 165°C, the controller issues an over-temperature fault and sends a unit shutdown signal to the operation and maintenance platform.

[0125] It should be noted that the heat dissipation system provided in this application embodiment has the beneficial effects of the heat exchange device 20 in any of the foregoing embodiments. For details, please refer to the foregoing description of the beneficial effects of the heat exchange device 20. This application embodiment will not repeat the description.

[0126] In some embodiments, the heat dissipation system further includes an abnormal operation detection component, which is communicatively connected to the power source 23 to obtain at least one of the number of start-stop cycles of the power source 23, the loop current of the power source 23, and the operation feedback of the power source 23. The controller is communicatively connected to the abnormal operation detection component and is also used to issue an alarm signal based on the detection result of the abnormal operation detection component.

[0127] In some embodiments, when the number of start-stop cycles of the power source 23 obtained by the controller is greater than or equal to 30 times within 24 hours, the controller communicates with the operation and maintenance platform to issue an abnormal alarm of "frequent start-ups".

[0128] In some embodiments, when the power source 23 is in the start-up state, if the circuit current of the power source 23 is greater than or equal to the rated current of the power source 23, that is, the circuit current of the internal circulation fan is greater than or equal to the rated current of the internal circulation fan, or the circuit current of the external circulation fan is greater than or equal to the rated current of the external circulation fan, the controller sends an abnormal alarm of "overload alarm" to the operation and maintenance platform.

[0129] In some embodiments, if any internal circulation fan operates without feedback, the controller communicates with the operation and maintenance platform to send an abnormal alarm of "internal circulation fan overload" and sends a signal to reduce the capacity of the unit to less than or equal to 50%, and uses its own radiation heat dissipation capacity for heat dissipation.

[0130] In some embodiments, if there is no feedback from the external circulation fan, the controller communicates with the operation and maintenance platform to send a signal for the unit to operate at reduced capacity, reducing the capacity to less than or equal to 10%, and using its own radiative heat dissipation capacity for heat dissipation.

[0131] In some embodiments, the controller is communicatively connected to the temperature sensing component, and the controller is also used to issue an alarm signal based on the detection results of the temperature sensing component.

[0132] In some embodiments, when the power source 23 is in the start-up state, if the maximum temperature is greater than 130°C, the controller communicates with the operation and maintenance platform to send a "prepare spare parts" prompt message.

[0133] In some embodiments, when the power source 23 is in the start-up state, if the maximum temperature is greater than 140°C, the controller communicates with the operation and maintenance platform to send a prompt message "Prepare to replace the faulty part".

[0134] In some embodiments, when the power source 23 is in the start-up state, if the maximum temperature is greater than 150°C, the controller communicates with the operation and maintenance platform to send a unit shutdown signal and a prompt message to "replace faulty parts".

[0135] In some optional embodiments of this application, intelligent diagnostics are performed on the system to prepare materials in advance and reduce standby time caused by spare parts shortages.

[0136] In some embodiments, the temperature measuring component includes multiple winding temperature measuring ends, and a multiphase winding is provided in the first cavity 211 and the second cavity 212. The multiple winding temperature measuring ends are respectively used to detect the temperature of each winding in the multiphase winding.

[0137] It should be noted that each embodiment of the nacelle cover mentioned above and below in this application can be manufactured and sold as an independent product, and of course, it can also be used as a component of a wind turbine generator set.

[0138] like Figures 1 to 3 As shown, another embodiment of this application provides a nacelle cover 10, which includes a windward plate and a leeward tail plate 14 arranged opposite to each other, as well as a top plate 15 and a bottom plate arranged opposite to each other. The relative directions of the top plate 15 and the bottom plate are set at an angle to the relative directions of the windward plate and the leeward tail plate 14. The windward plate, the leeward tail plate 14, the top plate 15 and the bottom plate enclose a mounting cavity, which is used to install the heat exchange device 20 provided above. The leeward tail plate 14 is provided with a first air inlet 11 and a first air outlet 12. In the direction from the top plate 15 to the bottom plate, the leeward tail plate 14 gradually tilts closer to the windward plate.

[0139] The nacelle cover 10 provided in this embodiment includes a windward panel and a leeward tail panel 14 arranged opposite each other, as well as a top panel 15 and a bottom panel arranged opposite each other. A first air inlet 11 and a first air outlet 12 are disposed on the leeward tail panel 14. When outside air enters the external circulation channel through the first air inlet 11 and the air in the external circulation channel is discharged to the outside through the first air outlet 12, the resistance to ambient wind is reduced. Furthermore, since the leeward tail panel 14 gradually tilts closer to the windward panel in the direction from the top panel 15 to the bottom panel, the probability of rainwater entering the external circulation channel through the first air inlet 11 and the first air outlet 12 under the influence of gravity is reduced, thus improving the water ingress prevention effect.

[0140] In some embodiments, the angle between the relative directions of the top plate 15 and the bottom plate and the leeward tail plate 14 is A2, where 8°≤A2≤12°.

[0141] Specifically, A2 can be 8°, 9°, 10°, 11°, 12°, or any value between 8° and 12°.

[0142] like Figure 3As shown, in some embodiments, the nacelle cover 10 also includes an air inlet cap 171 and an air outlet cap 172 disposed on the outside of the leeward tail plate 14. The air inlet cap 171 covers the second air inlet 213, and the air outlet cap 172 covers the second air outlet 214. The openings of the air inlet cap 171 and the air outlet cap 172 are both oriented towards the bottom plate along the axial direction Z. In the direction in which the top plate 15 and the bottom plate are disposed opposite each other, the distance between the plane where the opening of the air inlet cap 171 is located and the top plate 15 is L1, and the distance between the plane where the opening of the air outlet cap 172 is located and the top plate 15 is L2. Both L1 and L2 gradually increase in the direction from the windward plate to the leeward tail plate 14.

[0143] In some optional embodiments of this application, by providing an air inlet cap 171 and an air outlet cap 172, with the air inlet cap 171 covering the second air inlet 213 and the air outlet cap 172 covering the second air outlet 214, since the openings of the air inlet cap 171 and the air outlet cap 172 are both facing the bottom plate, the probability of external rainwater entering the external circulation channel through the second air inlet 213 and the second air outlet 214 can be further reduced.

[0144] It should be noted that the nacelle cover provided in this application embodiment has the beneficial effects of the nacelle cover of the wind turbine generator set in any of the foregoing embodiments. For details, please refer to the foregoing description of the beneficial effects of the nacelle cover of the wind turbine generator set. This application embodiment will not repeat the description.

[0145] While the embodiments disclosed in this application are as described above, the content is merely for the purpose of facilitating understanding of this application and is not intended to limit the invention. Any person skilled in the art to which this application pertains may make any modifications and changes in form and detail of the implementation without departing from the spirit and scope disclosed in this application; however, the scope of protection of this application shall still be determined by the scope defined in the appended claims.

[0146] The above description is merely a specific embodiment of this application. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, substitutions for other connection methods described above can be made by referring to the corresponding processes in the foregoing method embodiments, and will not be repeated here. It should be understood that the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the scope of protection of this application.

Claims

1. A wind turbine generator set, characterized in that, include: The nacelle canopy has a first air inlet and a first air outlet; A heat exchange device is installed inside the nacelle cover. The heat exchange device includes a shell, a heat exchange component, and a power source. The shell has a first cavity, a second cavity, a second air inlet, a second air outlet, and a clearance hole connecting the first cavity and the second cavity. The second air inlet is located on the inner wall of the shell that encloses the first cavity, and the second air outlet is located on the inner wall of the shell that encloses the second cavity. The heat exchange component is connected to the outer wall of the shell and has an external circulation channel and an internal circulation channel that cooperate with each other for heat exchange. The inlet of the external circulation channel is connected to the first air inlet, and the outlet is connected to the first air outlet. The inlet of the internal circulation channel is connected to the second air outlet, and the outlet is connected to the second air inlet. The power source is used to drive the fluid in the external circulation channel from the inlet to the outlet, and to drive the fluid in the internal circulation channel from the inlet to the outlet. A transformer is disposed in at least one of the first cavity and the second cavity. The windings and core assembly of the transformer pass through the clearance hole. The windings and core assembly have heat dissipation channels, and the two ends of the heat dissipation channels are respectively connected to the first cavity and the second cavity. In a first direction intersecting the axial direction of the clearance hole, both the first air inlet and the first air outlet are located on the side of the heat exchanger facing away from the housing.

2. The wind turbine generator set according to claim 1, characterized in that, The nacelle cover includes a windward plate and a leeward tail plate arranged opposite each other in the first direction, and a top plate and a bottom plate arranged opposite each other in the axial direction. The first air inlet and the first air outlet are both arranged on the leeward tail plate.

3. The wind turbine generator set according to claim 2, characterized in that, Along the axial direction and in the direction from the top plate to the bottom plate, the leeward tail plate gradually tilts closer to the windward plate; and / or, In the axial direction, the second air outlet is located on the side of the second air inlet facing the base plate.

4. The wind turbine generator set according to claim 2, characterized in that, The heat exchanger includes: A heat exchanger is connected to the housing. The heat exchanger has a first flow channel and a second flow channel. The inlet of the first flow channel is connected to the second air outlet, and the outlet of the first flow channel is connected to the second air inlet. An external circulation inlet pipe connects the inlet of the first flow channel and the first air inlet. In the first direction, the end of the external circulation inlet pipe facing away from the housing is connected to the leeward tail plate. An external circulation outlet pipe connects the outlet of the first flow channel and the first air outlet. In the first direction, the end of the external circulation inlet pipe facing away from the housing is connected to the leeward tail plate.

5. The wind turbine generator set according to claim 4, characterized in that, Along the axial direction from the top plate to the bottom plate, the end face of the external circulation inlet pipe facing away from the heat exchanger gradually approaches the windward plate, and the end face of the external circulation outlet pipe facing away from the heat exchanger gradually approaches the windward plate.

6. The wind turbine generator set according to claim 4, characterized in that, The heat exchanger also includes: The first flexible tube, the second flow channel and the external circulation outlet tube are connected through the first flexible tube; The second flexible tube connects the second flow channel and the external circulation inlet pipe.

7. The wind turbine generator set according to any one of claims 2 to 6, characterized in that, The cabin cover also includes: An air inlet cap and an air outlet cap are disposed on the side of the leeward tail plate away from the windward plate. The air inlet cap covers the second air inlet, and the air outlet cap covers the second air outlet. The openings of the air inlet cap and the air outlet cap are both oriented towards the bottom plate. In the direction along the first direction from the windward plate to the leeward tail plate, the distance between the plane where the opening of the air inlet cap is located and the top plate in the axial direction of the clearance hole gradually increases, and the distance between the plane where the opening of the air outlet cap is located and the top plate in the axial direction of the clearance hole also gradually increases. And / or, A reinforcing rib is provided on the side of the leeward tail plate facing the windward plate, and at least a portion of the structure of the reinforcing rib surrounds the outside of the first air outlet and the first air inlet. And / or, A first bird-proof net and a second bird-proof net are connected to the leeward tail plate. The first bird-proof net covers the second air inlet, and the second bird-proof net covers the second air outlet.

8. The wind turbine generator set according to any one of claims 1 to 6, characterized in that, The heat exchange device further includes: The third and fourth flexible pipes, wherein the inlet of the internal circulation channel is connected to the second air outlet through the third flexible pipe, and the outlet of the internal circulation channel is connected to the second air inlet through the fourth flexible pipe; and / or, A protective net is installed over the second air inlet and connected to the housing.

9. The wind turbine generator set according to any one of claims 1 to 6, characterized in that, The housing includes an outer shell and a heat exchange bracket. The heat exchange bracket is connected to the outside of the outer shell and is located on one side of the outer shell in the first direction. The heat exchange component is detachably connected to the heat exchange bracket. The first cavity, the second cavity, the clearance hole, the second air inlet, and the second air outlet are all disposed on the outer shell.

10. The wind turbine generator set according to claim 9, characterized in that, The heat exchange bracket includes a heat exchange platform, which is detachably connected to the outer shell. The heat exchange element is disposed on one side of the heat exchange platform along the axial direction of the clearance hole. The heat exchange bracket further includes: Diagonal bracing members are connected to the outer casing and the heat exchange platform, respectively; and / or, A connecting beam is located on the side of the heat exchange component facing away from the heat exchange platform in the axial direction of the clearance hole. The connecting beam is connected to the outer shell and the heat exchange component respectively.

11. The wind turbine generator set according to any one of claims 1 to 6, characterized in that, In the first direction, both the second air inlet and the second air outlet are located on the side of the housing facing the heat exchanger; and / or, The end of the heat dissipation channel facing the second cavity is flush with the end of the clearance hole facing the second cavity.

12. A heat exchange device, characterized in that, include: The housing has a first cavity, a second cavity, a second air inlet, a second air outlet, and a clearance hole connecting the first cavity and the second cavity. The clearance hole is used for the winding and core assembly of the transformer to pass through. The second air inlet is located on the inner wall of the housing that encloses the first cavity, and the second air outlet is located on the inner wall of the housing that encloses the second cavity. A heat exchanger is connected to the outer wall of the housing and has an external circulation channel and an internal circulation channel that are mutually heat exchanged and cooperated. The inlet of the internal circulation channel is connected to the second air outlet and the outlet is connected to the second air inlet. A power source is used to drive the fluid in the external circulation channel from the inlet to the outlet, and to drive the fluid in the internal circulation channel from the inlet to the outlet; In the first direction intersecting the axial direction of the clearance hole, the inlet and outlet of the external circulation channel are both located on the side of the heat exchanger away from the housing.

13. The heat exchange device according to claim 12, characterized in that, The housing has a top end and a bottom end, and the heat exchange element includes: A heat exchanger is connected to the housing. The heat exchanger has a first flow channel and a second flow channel. The inlet of the first flow channel is connected to the second air outlet, and the outlet of the first flow channel is connected to the second air inlet. The external circulation inlet pipe is connected to the inlet of the first flow channel; The external circulation outlet pipe is connected to the outlet of the first flow channel; Wherein, in the direction along the axial direction of the clearance hole from the top end to the bottom end, the end face of the external circulation inlet pipe facing away from the heat exchanger gradually slopes towards the shell, and the end face of the external circulation outlet pipe facing away from the heat exchanger gradually slopes towards the shell; and / or, In the direction from the top end to the bottom end along the axial direction of the clearance hole, the size of the external circulation inlet pipe gradually decreases in the first direction, and the size of the external circulation outlet pipe gradually decreases in the first direction.

14. The heat exchange device according to claim 13, characterized in that, In the axial direction of the clearance hole, the second air outlet is located on the side of the second air inlet facing the bottom end.

15. A heat dissipation system, characterized in that, include: The heat exchange device as described in any one of claims 12 to 14; A temperature measuring component is disposed on the housing, and the temperature measuring component is used to acquire the temperature inside the first cavity and the second cavity; The controller is communicatively connected to both the temperature measuring component and the heat exchanger, and is used to control the power source to operate based on the detection results of the temperature measuring component.

16. The heat dissipation system according to claim 15, characterized in that, The heat dissipation system also includes: An abnormal operation detection component, communicatively connected to the power source, is configured to obtain at least one of the following: the number of start-stop cycles of the power source, the loop current of the power source, and operational feedback from the power source. A controller, also communicatively connected to the abnormal operation detection component, is further configured to issue an alarm signal based on the detection results of the abnormal operation detection component; and / or, The controller is communicatively connected to the temperature measuring component, and the controller is also used to issue an alarm signal based on the detection result of the temperature measuring component.

17. A cabin canopy, characterized in that, The nacelle cover includes a windward plate and a leeward tail plate arranged opposite each other, as well as a top plate and a bottom plate arranged opposite each other. The relative directions of the top plate and the bottom plate are set at an angle to the relative directions of the windward plate and the leeward tail plate. The windward plate, the leeward tail plate, the top plate, and the bottom plate enclose a mounting cavity. The mounting cavity is used to install the heat exchange device as described in any one of claims 12 to 14. The leeward tail plate is provided with a first air inlet and a first air outlet. In the direction from the top plate to the bottom plate, the leeward tail plate gradually tilts closer to the windward plate.

18. The nacelle canopy according to claim 17, characterized in that, The nacelle cover also includes an air inlet cap and an air outlet cap disposed on the outside of the leeward tail plate. The air inlet cap covers the second air inlet, and the air outlet cap covers the second air outlet. The openings of the air inlet cap and the air outlet cap are both oriented towards the bottom plate along the axial direction. In the direction in which the top plate and the bottom plate are arranged opposite each other, the distance between the plane where the opening of the air inlet cap is located and the top plate is L1, and the distance between the plane where the opening of the air outlet cap is located and the top plate is L2. Both L1 and L2 gradually increase in the direction from the windward plate to the leeward tail plate.

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