Wind turbine generator system

Abstract

This application provides a wind turbine generator set, including a rotating part, a generator having a stator and a rotor, a first heat dissipation structure, and a first cooling circuit with coolant. The rotor is connected to the rotating part. The rotational speed of the rotor is equal to the rotational speed of the rotating part. The first heat dissipation structure is disposed on the rotating part. The first cooling circuit passes through the first heat dissipation structure and the rotor to achieve heat exchange between the first heat dissipation structure and the rotor; wherein the first cooling circuit remains relatively stationary with respect to the rotating part. The first heat dissipation structure is disposed on the rotating part at the same rotational speed as the rotor, thus allowing the first heat dissipation structure and the rotor to remain relatively stationary, facilitating the arrangement of the first cooling circuit, thereby enabling water cooling of the rotor and improving the rotor's heat dissipation effect.

Description

Technical Field

[0001] This application relates to the field of wind turbine technology, and more particularly to a wind turbine generator set. Background Technology

[0002] During the operation of a wind turbine generator, the generator continuously generates heat, thus requiring heat dissipation. There are two main cooling methods: air cooling and water cooling. Air cooling typically refers to the design of channels within the stator or rotor for airflow. Liquid cooling typically refers to the arrangement of cooling pipes passing through the stator or rotor.

[0003] Because the rotor of a wind turbine is constantly rotating during operation, it is difficult to install cooling pipes. Therefore, some wind turbine rotors use air cooling. However, air has low thermal conductivity and low specific heat, resulting in poor heat dissipation for the rotor. Summary of the Invention

[0004] This application provides a wind turbine generator set with good heat dissipation.

[0005] This application provides a wind turbine generator set, including:

[0006] Rotating part;

[0007] A generator having a stator and a rotor; the rotor is connected to the rotating part; wherein the rotational speed of the rotor is equal to the rotational speed of the rotating part;

[0008] A first heat dissipation structure is disposed on the rotating part; and

[0009] A first cooling circuit with coolant passes through the first heat dissipation structure and the rotor to achieve heat exchange between the first heat dissipation structure and the rotor; wherein the first cooling circuit remains relatively stationary with respect to the rotating part.

[0010] Furthermore, the system includes a nacelle and an exhaust system, with the rotating part and the generator disposed within the nacelle; the nacelle includes an air duct with heat dissipation vents for heat dissipation; the first heat dissipation structure and the exhaust system are disposed within the air duct.

[0011] Furthermore, the heat dissipation vent includes an external circulation heat dissipation vent that communicates with the outside of the cabin; the external circulation heat dissipation vent includes a first heat dissipation vent, a second heat dissipation vent, and a third heat dissipation vent; the first heat dissipation vent and the second heat dissipation vent are located on one side of the air duct and are separated from each other; the third heat dissipation vent is located on the opposite side of the air duct; the number of exhaust components is at least two, wherein at least one exhaust component is located at the first heat dissipation vent and at least one exhaust component is located at the second heat dissipation vent; the exhaust components are used to exhaust the hot air inside the air duct to the outside of the cabin.

[0012] Furthermore, the cabin includes a controller and a heat dissipation damper disposed at the third heat dissipation vent, the controller being connected to the heat dissipation damper; the heat dissipation damper includes a first position and a second position, when the heat dissipation damper is in the first position, the third heat dissipation vent is connected to the air duct, and when the heat dissipation damper is in the second position, the heat dissipation damper blocks the third heat dissipation vent; the controller is used to control the heat dissipation damper to switch between the first position and the second position according to the temperature of the external environment.

[0013] Furthermore, the air duct includes a first space and a second space, the first heat dissipation structure is disposed in the first space; the external circulation heat dissipation port is disposed in the second space; the first space is circular, and the rotation axis of the rotating part coincides with the central axis of the first space.

[0014] Furthermore, the wind turbine generator set also includes a cooling assembly and a second heat dissipation structure disposed within the nacelle; the cooling assembly includes a cooling structure and a second cooling circuit with coolant, the second cooling circuit passing through the cooling structure and the second heat dissipation structure to achieve cooling of the second heat dissipation structure; the heat dissipation port includes an internal circulation heat dissipation port; the second heat dissipation structure is disposed at the internal circulation heat dissipation port.

[0015] Furthermore, the heat dissipation vent includes an external circulation heat dissipation vent; the air duct includes a first space, a second space, and a third space, the first heat dissipation structure is disposed in the first space, the external circulation heat dissipation vent is disposed in the second space, and the internal circulation heat dissipation vent is disposed in the third space; one of the second space and the third space is connected to the first space; when the first space is connected to the second space, the exhaust component is used to exhaust the hot air inside the air duct to the outside of the cabin; when the first space is connected to the third space, the exhaust component is used to exhaust the hot air inside the air duct to the second heat dissipation structure.

[0016] Furthermore, the exhaust component is positioned closer to the second heat dissipation structure than the first heat dissipation structure; or

[0017] The number of exhaust components is at least two, wherein at least one exhaust component is disposed near the second heat dissipation structure relative to the first heat dissipation structure; and at least one exhaust component is disposed near the first heat dissipation structure relative to the second heat dissipation structure.

[0018] Furthermore, the system includes a nacelle, with the rotating part disposed on one side of the nacelle along the horizontal direction; the generator is disposed inside the nacelle, and the first heat dissipation structure is disposed outside the nacelle.

[0019] Furthermore, the first cooling circuit is fixedly disposed on the rotating part.

[0020] The wind turbine generator set provided in this application includes a rotating part, a generator having a stator and a rotor, a first heat dissipation structure, and a first cooling circuit with coolant. The rotor is connected to the rotating part. The rotational speed of the rotor is equal to the rotational speed of the rotating part. The first heat dissipation structure is disposed on the rotating part. The first cooling circuit passes through the first heat dissipation structure and the rotor to achieve heat exchange between the first heat dissipation structure and the rotor; wherein the first cooling circuit remains relatively stationary with respect to the rotating part. The first heat dissipation structure is disposed on the rotating part at a rotational speed equal to that of the rotor, thus allowing the first heat dissipation structure and the rotor to remain relatively stationary. The first cooling circuit passes through the first heat dissipation structure and the rotor, and remains relatively stationary with respect to the rotating part. This allows the first heat dissipation structure and the first cooling circuit to rotate together with the rotor, preventing the first cooling circuit from twisting or bending during rotor rotation. This facilitates the arrangement of the first cooling circuit, enables water cooling of the rotor, and improves the rotor's heat dissipation effect.

[0021] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0022] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0023] Figure 1 The diagram shown is a simplified structural diagram of a wind turbine generator set according to an exemplary embodiment of this application;

[0024] Figure 2 As shown Figure 1 The cross-sectional view of the cooling damper of the wind turbine generator set shown is in the first position;

[0025] Figure 3 As shown Figure 1 A cross-sectional view of the wind turbine generator set with the cooling damper in the second position;

[0026] Figure 4The diagram shown is a simplified structural diagram of a wind turbine generator set according to another exemplary embodiment of this application;

[0027] Figure 5 The diagram shown is a simplified structural diagram of a wind turbine generator set according to another exemplary embodiment of this application. Detailed Implementation

[0028] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0029] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to limit the application. Unless otherwise defined, the technical or scientific terms used in this application should be understood in their ordinary sense by one of ordinary skill in the art to which this application pertains. The terms "first," "second," and similar terms used in this application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "a" or "one," etc., do not indicate a quantity limitation, but rather indicate the presence of at least one. "A plurality" or "several" indicates two or more. Unless otherwise indicated, the terms "front," "rear," "lower," and / or "upper," etc., are for ease of description only and are not limited to a location or spatial orientation. The terms "comprising" or "including," etc., mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including" and their equivalents, and do not exclude other elements or objects. The terms "connected," "linked," etc., are not limited to physical or mechanical connections and can include electrical connections, whether direct or indirect.

[0030] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The singular forms “a,” “the,” and “the” used in this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0031] This application provides a wind turbine generator set. The wind turbine generator set of this application will be described in detail below with reference to the accompanying drawings. Unless otherwise specified, the features of the following embodiments and implementations can be combined with each other.

[0032] See Figures 1 to 5 As shown, this application provides a wind turbine generator set 10. The wind turbine generator set 10 can be a non-direct-drive wind turbine generator set or a direct-drive wind turbine generator set. The wind turbine generator set 10 includes a rotating part 11, a generator 14 having a stator 12 and a rotor 13, a first heat dissipation structure 15, and a first cooling circuit 16 having coolant.

[0033] Generator 14 has a stator 12 and a rotor 13. For example... Figure 1 and Figure 4 As shown, the stator 12 of the generator 14 can be disposed outside the rotor 13. Figure 5 As shown, the stator 12 of the generator 14 can also be disposed inside the rotor 13. The rotor 13 of the generator 14 is connected to the rotating part 11. The rotation axis of the rotating part 11 can coincide with the rotation axis of the rotor 13 of the generator 14. Alternatively, the rotation axis of the rotating part 11 can be parallel to the rotation axis of the rotor 13. The rotational speed of the rotor 13 is equal to the rotational speed of the rotating part 11. Thus, the rotating part 11 can remain relatively stationary with respect to the rotor 13. In some embodiments, the wind turbine generator set 10 may include a wind turbine 26 (e.g., Figure 5 (As shown). The wind turbine 26 may include a rotatable hub 27 (as shown). Figure 5 (as shown) and at least one blade 28 extending outward from the hub 27 (as shown) Figure 5 (As shown). The number of blades 28 can be three, evenly distributed around the rotation axis of the hub 27 to facilitate the reception of natural wind. The blades 28 receive natural wind and drive the hub 27 to rotate, thereby converting wind energy into mechanical energy. When the wind turbine generator set 10 is a non-direct-drive wind turbine generator set, such as a speed-increasing wind turbine generator set, the rotating part 11 of the wind turbine generator set 10 can be a rotating shaft connected to the rotor 13. The rotation of the hub 27 can drive the rotating shaft to rotate, thereby driving the rotor 13 of the generator 14 to rotate, generating electrical energy. When the wind turbine generator set 10 is a direct-drive wind turbine generator set, the rotating part 11 can be the hub 27, and the rotation of the hub 27 can directly drive the rotor 13 of the generator 14 to rotate, generating electrical energy.

[0034] A first heat dissipation structure 15 is disposed on the rotating part 11. Thus, the first heat dissipation structure 15 can remain relatively stationary with respect to the rotating part 11, and consequently, it can remain relatively stationary with respect to the rotor 13. The first heat dissipation structure 15 may be a finned heat exchanger. The first heat dissipation structure 15 enables heat exchange between the coolant and air in the first cooling circuit 16 passing through it. The first cooling circuit 16 passes through the first heat dissipation structure 15 and the rotor 13 to achieve heat exchange between them; the first cooling circuit 16 remains relatively stationary with respect to the rotating part 11. Thus, the first cooling circuit 16 can remain relatively stationary with respect to the first heat dissipation structure 15 and the rotor 13. The first cooling circuit 16 may pass through the interior of the first heat dissipation structure 15 and the rotor 13, and may be a pipe at least partially arranged inside the first heat dissipation structure 15 and the rotor 13. The first cooling circuit 16 may also pass through the surface of the rotor 13, and may be a cooling jacket at least partially arranged on the surface of the rotor 13. The coolant can circulate in the first cooling circuit 16, and can flow through the rotor 13 and the first heat dissipation structure 15. The coolant flows through the rotor 13, absorbing the heat generated by it, thus raising its temperature. The warmer coolant then flows through the first heat dissipation structure 15, where it exchanges heat with the air. For example, since the first heat dissipation structure 15 is located on the rotating part 11, it rotates with the rotating part 11, resulting in airflow around it, which lowers the coolant temperature. The cooled coolant then flows back to one side of the rotor 13, achieving continuous cooling of the rotor 13.

[0035] In the wind turbine generator set 10 of this application, the first heat dissipation structure 15 is disposed on the rotating part 11 at the same rotational speed as the rotor 13. This allows the first heat dissipation structure 15 and the rotor 13 to remain relatively stationary. The first cooling circuit 16 passes through the first heat dissipation structure 15 and the rotor 13, and the first cooling circuit 16 remains relatively stationary with the rotating part 11. Thus, the first heat dissipation structure 15, the first cooling circuit 16, the rotating part 11, and the rotor 13 can remain relatively stationary. This allows the first heat dissipation structure 15 and the first cooling circuit 16 to rotate together with the rotor 13, preventing the first cooling circuit 16 from twisting or bending during the rotation of the rotor 13. This solves the problem of difficulty in arranging the coolant flow circuit due to the rotation of the rotor 13, thus facilitating the arrangement of the first cooling circuit 16. A coolant flow path can be arranged at the rotor 13, thereby achieving liquid cooling of the rotor 13. The rotor 13 has good heat dissipation effect, achieving efficient heat dissipation of the rotor 13 of the wind turbine generator set 10. In this way, while greatly improving the heat dissipation performance of rotor 13, the first heat dissipation structure 15 and the first cooling circuit 16 can rotate together with rotor 13, which can prevent coolant leakage.

[0036] In some embodiments, the first cooling circuit 16 is fixedly disposed on the rotating part 11. The first cooling circuit 16 may be fixedly disposed on the outer surface of the rotating part 11. The first cooling circuit 16 may be a pipe. The first cooling circuit 16 can be fixed to the outer surface of the rotating part 11 by a mounting bracket, so that the first cooling circuit 16 can remain relatively stationary with respect to the first heat dissipation structure 15 and the rotor 13. This prevents the first cooling circuit 16 from shaking during the rotation of the rotor 13, thus improving reliability.

[0037] See Figures 1 to 4 As shown, in some embodiments, the wind turbine generator set 10 includes a nacelle 17 and an exhaust fan 18. The exhaust fan 18 can be a fan. There can be at least one exhaust fan 18, or at least two. A rotating part 11 and a generator 14 are disposed within the nacelle 17. In this case, the rotating part 11 can be a rotating shaft with the same rotational speed as the rotor 13. The nacelle 17 includes an air duct 19, which is provided with a heat dissipation vent 20. Air can be exhausted outside the air duct 19 through the heat dissipation vent 20. A first heat dissipation structure 15 and the exhaust fan 18 are disposed within the air duct 19. The exhaust fan 18 can be fixed to the inner wall of the air duct 19. In some embodiments, the air duct 19 includes a first space 21 and a second space 22. The heat dissipation vent 20 includes an external circulation heat dissipation vent 30 communicating with the outside of the nacelle 17. The first heat dissipation structure 15 is disposed within the first space 21, and the external circulation heat dissipation vent 30 is disposed in the second space 22. The exhaust fan 18 can be located in either the first space 21 or the second space 22. The exhaust fan 18 accelerates airflow, thereby improving the cooling effect on the coolant flowing through the first heat dissipation structure 15. The first space 21 is circular, and the rotation axis of the rotating part 11 coincides with the central axis of the first space 21. This allows for greater airflow through the first heat dissipation structure 15, enhancing its heat dissipation effect.

[0038] See Figure 2 and Figure 3 As shown, in some embodiments, the external circulation heat dissipation vent 30 includes a first heat dissipation vent 31, a second heat dissipation vent 32, and a third heat dissipation vent 33. The first heat dissipation vent 31 and the second heat dissipation vent 32 are located on one side of the air duct 19 and are separated from each other. The first heat dissipation vent 31 and the second heat dissipation vent 32 can be symmetrically arranged. The third heat dissipation vent 33 is located on the opposite side of the air duct 19. There are at least two exhaust components 18, with at least one exhaust component 18 located at the first heat dissipation vent 31 and at least one exhaust component 18 located at the second heat dissipation vent 32. The exhaust components 18 are used to exhaust hot air inside the air duct 19 to the outside of the cabin 17. The arrangement of the first heat dissipation vent 31, the second heat dissipation vent 32, and the third heat dissipation vent 33 results in a larger airflow, allowing the heat from the first heat dissipation structure 15 to be discharged to the outside of the cabin 17, thus achieving good heat dissipation.

[0039] In some embodiments, the cabin 17 includes a controller 34 and a cooling damper 35 disposed at a third heat dissipation vent 33, the controller 34 being connected to the cooling damper 35. The cooling damper 35 includes a first position (e.g., Figure 2 (as shown) and the second position (as shown) Figure 3 As shown, when the cooling damper 35 is in the first position, the third cooling vent 33 is connected to the air duct 19. At this time, the first cooling vent 31 and the second cooling vent 32 can be air inlets, and the third cooling vent 33 can be air outlets. By opening the exhaust components 18 located at the first cooling vent 31 and the second cooling vent 32, external air from the engine compartment 17 can enter through the first cooling vent 31 and the second cooling vent 32, flow through a semi-circular stroke, and then exit through the third cooling vent 33. The airflow direction at the first cooling vent 31 can be opposite to the rotation direction of the rotating part 11, and the airflow direction at the second cooling vent 32 can be the same as the rotation direction of the rotating part 11. When the cooling damper 35 is in the second position, the cooling damper 35 blocks the third cooling vent 33. At this time, the first cooling vent 31 can be an air inlet, and the second cooling vent 32 can be an air outlet. When the exhaust fan 18, located at the first heat dissipation vent 31, is opened, external air from the engine compartment 17 can enter through the first heat dissipation vent 31, flow through a full circular path, and then exit through the second heat dissipation vent 32. The airflow direction is opposite to the rotation direction of the rotating part 11, thereby increasing the relative velocity of the air passing through the first heat dissipation vent 31 and enhancing heat exchange capacity. The controller 34 controls the cooling damper 35 to switch between a first position and a second position based on the ambient temperature. If the ambient temperature is higher than a first set temperature, the cooling damper 35 can be switched to the first position; if the ambient temperature is lower than the first set temperature, the cooling damper 35 can be switched to the second position. By changing the air inlet and outlet, the redundancy of heat exchange capacity caused by changes in ambient temperature is regulated, thereby effectively saving energy consumption of the exhaust fan 18. Furthermore, the relative velocity between the non-rotating airflow and the rotating first heat dissipation structure 15 can be effectively utilized to improve the heat exchange performance of the first heat dissipation structure 15.

[0040] In some embodiments, the exhaust fan 18 is disposed close to the first heat dissipation structure 15 relative to the external circulation heat dissipation port 30. The exhaust fan 18 may be fixed to the inner wall of the air duct 19 near the first heat dissipation structure 15. The close proximity of the exhaust fan 18 to the first heat dissipation structure 15 allows nearby cool air to pass through the first heat dissipation structure 15 more effectively for heat exchange.

[0041] See Figure 4As shown, in some embodiments, the wind turbine generator set 10 further includes a cooling assembly 36 and a second heat dissipation structure 23 disposed within the nacelle 17. The second heat dissipation structure 23 may be a finned heat exchanger. Optionally, the second heat dissipation structure 23 may be used to cool the stator 12 of the generator 14. The cooling assembly 36 includes a cooling structure 24 and a second cooling circuit 25 containing coolant. The cooling structure 24 may be a cooling tower. The second cooling circuit 25 passes through the cooling structure 24 and the second heat dissipation structure 23, achieving heat exchange between the second heat dissipation structure 23 and the cooling structure 24 to cool the second heat dissipation structure 23. The heat dissipation port 20 includes an internal circulation heat dissipation port 37, at which the second heat dissipation structure 23 is disposed. The internal circulation heat dissipation port 37 may communicate with the interior of the nacelle 17. One side of the second heat dissipation structure 23 may be located at the internal circulation heat dissipation port 37, while the other side may be exposed inside the nacelle 17. The second heat dissipation structure 23 may be sealed within the internal circulation heat dissipation port 37. Thus, the second heat dissipation structure 23 can dissipate some of the heat from the hot air exhausted from the first heat dissipation structure 15 by the exhaust fan 18 within the engine compartment 17. Simultaneously, it can work in conjunction with the cooling structure 24 to reduce the temperature of the hot air exhausted from the exhaust fan 18, resulting in a better cooling effect. The second cooling circuit 25 can pass through the interiors of the second heat dissipation structure 23 and the cooling structure 24, and can be a pipe at least partially arranged inside the second heat dissipation structure 23 and the cooling structure 24. The coolant can circulate in the second cooling circuit 25, and can flow through the second heat dissipation structure 23 and the cooling structure 24. As the coolant flows through the second heat dissipation structure 23, it can absorb the heat from the hot air exhausted from the first heat dissipation structure 15 by the exhaust fan 18, raising its temperature. The heated coolant then flows through the cooling structure 24, where it can exchange heat with the air and cool down. The cooling structure 24 is located outside the engine compartment 17. The cooling structure 24 can be located at the top of the engine compartment. This further enhances the cooling effect, allowing the heat from the coolant to be dissipated into the air outside the engine compartment 17. The low-temperature coolant can flow back to one side of the second heat dissipation structure 23, thus achieving a continuous cooling effect. This arrangement eliminates the need for the air duct 19 to be directly connected to the external environment of the cabin 17, allowing it to adapt to different external environments and operate well even in high humidity conditions.

[0042] In some embodiments, the exhaust fan 18 is disposed close to the second heat dissipation structure 23 relative to the first heat dissipation structure 15. The exhaust fan 18 can be fixed to the inner wall of the air duct 19 near the second heat dissipation structure 23. The proximity of the exhaust fan 18 to the second heat dissipation structure 23 allows it to draw hot air from the first heat dissipation structure 15 to the second heat dissipation structure 23, thus facilitating a reduction in the temperature of the coolant flowing through the first heat dissipation structure 15. The second heat dissipation structure 23 is located at the internal circulation heat dissipation port 37, and the exhaust fan 18 is used to exhaust hot air from inside the air duct 19 to the second heat dissipation structure 23. Heat exchange between the first heat dissipation structure 15 and the second heat dissipation structure 23 can be achieved through the exhaust fan 18. The second heat dissipation structure 23 can cool the hot air exhausted by the exhaust fan 18.

[0043] In some other embodiments, the number of exhaust components 18 is at least two, wherein at least one exhaust component 18 is disposed relative to the first heat dissipation structure 15 and close to the second heat dissipation structure 23. At least one exhaust component 18 is disposed relative to the second heat dissipation structure 23 and close to the first heat dissipation structure 15. This results in better heat exchange.

[0044] In some embodiments, the air duct 19 includes a third space 38. An internal circulation heat dissipation vent 37 is disposed in the third space 38. One of the second space 22 and the third space 38 communicates with the first space 21. When the first space 21 communicates with the second space 22, the exhaust fan 18 is used to exhaust the hot air inside the air duct 19 to the outside of the cabin 17. When the first space 21 communicates with the third space 38, the exhaust fan 18 is used to exhaust the hot air inside the air duct 19 to the second heat dissipation structure 23. When the ambient temperature is higher than a second set temperature, the first space 21 communicates with the second space 22, and the external air of the cabin 17 can be used to dissipate heat from the first heat dissipation structure 15. This can save costs. When the ambient temperature is lower than the second set temperature, the second heat dissipation structure 23 can be used to dissipate heat from the first heat dissipation structure 15. This can ensure that the internal air of the cabin 17 is clean and free of impurities, making the internal structure of the cabin 17 less prone to corrosion. It can also operate well under high humidity conditions. One of the second space 22 and the third space 38 communicates with the first space 21. It enhances the flexibility of heat exchange capacity adjustment, resulting in better heat exchange performance.

[0045] In some embodiments, the generator 14 includes a housing 29 for protecting the stator 12 and rotor 13. The stator 12 and rotor 13 are disposed within the housing 29, and a second heat dissipation structure 23 is disposed on the upper surface of the housing 29. The second heat dissipation structure 23 can be stationary relative to the nacelle 17 and rotatable relative to the first heat dissipation structure 15, facilitating the arrangement of the second heat dissipation structure 23. The second heat dissipation structure 23 can be fixedly disposed on the upper surface of the housing 29, thus bringing the second heat dissipation structure 23 closer to the cooling structure 24, allowing the second cooling circuit 25 to be shorter.

[0046] In some embodiments, the wind turbine generator set 10 further includes a gearbox (not shown) disposed within the nacelle 17. A rotating part 11 is connected to the gearbox. When the wind turbine generator set 10 is a non-direct-drive wind turbine generator set, the rotating part 11 of the wind turbine generator set 10 can be a rotating shaft indirectly connected to the hub 27. The rotating part 11 can be connected to the hub 27 via the gearbox. One end of the rotating part 11 can be connected to the gearbox, and the other end can be connected to the rotor 13. The gearbox can be configured to rotate at a speed relative to the hub 27, thereby increasing the rotational speed of the rotating part 11 and thus allowing the rotor 13 to rotate faster. A first heat dissipation structure 15 is disposed between the gearbox and the generator 14. This saves space inside the nacelle 17. In other embodiments, the first heat dissipation structure 15 can also be disposed on the side of the generator 14 away from the gearbox.

[0047] See Figure 5 As shown, in some embodiments, the rotating part 11 is disposed on one side of the nacelle 17 along the horizontal direction X. When the wind turbine generator set 10 is a direct-drive wind turbine generator set, the rotational speed of the hub 27 of the wind turbine generator set 10 is equal to the rotational speed of the rotor 13 of the generator 14. In this case, the rotating part 11 can be the hub 27. The generator 14 is disposed inside the nacelle 17, and the first heat dissipation structure 15 is disposed outside the nacelle 17. In this way, the heat from the rotor 13 of the generator 14 can be dissipated to the external environment. The coolant flows through the rotor 13 and can absorb the heat generated by the rotor 13. The temperature of the coolant will rise after absorbing the heat generated by the rotor 13. The increased temperature of the coolant flows through the first heat dissipation structure 15 and can exchange heat with the outside air of the nacelle 17 at the first heat dissipation structure 15, thereby reducing the temperature of the coolant.

[0048] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims.

[0049] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A wind turbine generator set, characterized in that, include: Rotating part; A generator having a stator and a rotor; the rotor is connected to the rotating part; wherein the rotational speed of the rotor is equal to the rotational speed of the rotating part; A first heat dissipation structure is disposed on the rotating part; and A first cooling circuit with coolant passes through the first heat dissipation structure and the rotor to achieve heat exchange between the first heat dissipation structure and the rotor; wherein the first cooling circuit remains relatively stationary with respect to the rotating part; The system includes a nacelle and an exhaust system, with the rotating part and the generator disposed within the nacelle; the nacelle includes an air duct with heat dissipation vents; the first heat dissipation structure and the exhaust system are disposed within the air duct. It also includes a cooling assembly and a second heat dissipation structure disposed within the cabin; the cooling assembly includes a cooling structure and a second cooling circuit with coolant, the second cooling circuit passing through the cooling structure and the second heat dissipation structure to achieve cooling of the second heat dissipation structure; the heat dissipation port includes an internal circulation heat dissipation port; the second heat dissipation structure is disposed at the internal circulation heat dissipation port.

2. The wind turbine generator set according to claim 1, characterized in that, The heat dissipation vent includes an external circulation heat dissipation vent that communicates with the outside of the cabin; the external circulation heat dissipation vent includes a first heat dissipation vent, a second heat dissipation vent, and a third heat dissipation vent; the first heat dissipation vent and the second heat dissipation vent are located on one side of the air duct and are separated from each other; the third heat dissipation vent is located on the opposite side of the air duct; the number of exhaust components is at least two, wherein at least one exhaust component is located at the first heat dissipation vent and at least one exhaust component is located at the second heat dissipation vent; the exhaust components are used to exhaust hot air inside the air duct to the outside of the cabin.

3. The wind turbine generator set according to claim 2, characterized in that, The cabin includes a controller and a heat dissipation damper disposed at the third heat dissipation vent. The controller is connected to the heat dissipation damper. The heat dissipation damper has a first position and a second position. When the heat dissipation damper is in the first position, the third heat dissipation vent is connected to the air duct. When the heat dissipation damper is in the second position, the heat dissipation damper blocks the third heat dissipation vent. The controller is used to control the heat dissipation damper to switch between the first position and the second position according to the temperature of the external environment.

4. The wind turbine generator set according to claim 2, characterized in that, The air duct includes a first space and a second space, with the first heat dissipation structure disposed in the first space; the external circulation heat dissipation port is disposed in the second space; the first space is circular, and the rotation axis of the rotating part coincides with the central axis of the first space.

5. The wind turbine generator set according to claim 1, characterized in that, The heat dissipation vent includes an external circulation heat dissipation vent; the air duct includes a first space, a second space, and a third space, the first heat dissipation structure is disposed in the first space, the external circulation heat dissipation vent is disposed in the second space, and the internal circulation heat dissipation vent is disposed in the third space; one of the second space and the third space is connected to the first space; when the first space is connected to the second space, the exhaust component is used to exhaust the hot air inside the air duct to the outside of the cabin; when the first space is connected to the third space, the exhaust component is used to exhaust the hot air inside the air duct to the second heat dissipation structure.

6. The wind turbine generator set according to claim 1, characterized in that, The exhaust component is positioned closer to the second heat dissipation structure than the first heat dissipation structure; or The number of exhaust components is at least two, wherein at least one exhaust component is disposed near the second heat dissipation structure relative to the first heat dissipation structure; and at least one exhaust component is disposed near the first heat dissipation structure relative to the second heat dissipation structure.

7. The wind turbine generator set according to claim 1, characterized in that, The system includes a nacelle, with the rotating part disposed on one side of the nacelle along the horizontal direction; the generator is disposed inside the nacelle, and the first heat dissipation structure is disposed outside the nacelle.

8. The wind turbine generator set according to claim 1, characterized in that, The first cooling circuit is fixedly installed on the rotating part.

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