Wind turbine generator set

Abstract

This application relates to a wind turbine generator set, comprising: a gearbox including a housing, a gear train disposed within the housing, and an output shaft connected to the output end of the gear train; a generator connected to the housing and forming a first chamber, the generator including a rotor and a stator rotatably coupled thereto, the stator being connected to the housing, the rotor being connected to the output shaft, the generator having a second chamber and a connecting hole connecting the second chamber and the first chamber; and a baffle member disposed in the second chamber, the baffle member being connected to at least one of the output shaft and the rotor and obtaining power to at least partially transport airflow in the second chamber to the first chamber through the connecting hole. The wind turbine generator set provided in this application reduces the probability of oil leakage while ensuring cooling requirements.

Description

Technical Field

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

[0002] To ensure that the temperature of the generator windings and magnets is controlled within a certain range during the operation of the wind turbine generator set, a cooling system is usually installed. Direct air cooling can be used, which uses air intake to create negative pressure inside the nacelle, drawing in ambient air. The air then enters the generator through the air inlet, cooling the rotor and stator inside the generator before being discharged from the nacelle through the generator outlet.

[0003] In the integrated gearbox and generator design, a cavity is formed between the high-speed end of the gearbox and the generator. Because the generator cooling fan operates by suction, the cavity is under negative pressure when the fan is running. Under this negative pressure, the high-speed shaft seal of the gearbox is more prone to leakage, allowing lubricating oil from the gearbox to enter the generator. Summary of the Invention

[0004] This application provides a wind turbine generator set that can reduce the probability of oil leakage while ensuring cooling requirements.

[0005] On one hand, according to an embodiment of this application, a wind turbine generator set is proposed, including: a gearbox, including a housing, a gear train disposed in the housing, and an output shaft connected to the output end of the gear train; a generator, connected to the housing and forming a first chamber, the generator including a rotor and a stator that are rotatably engaged, the stator being connected to the housing, the rotor being connected to the output shaft, the generator having a second chamber and a connecting hole connecting the second chamber and the first chamber; a turbulence-disrupting component, disposed in the second chamber, the turbulence-disrupting component being connected to at least one of the output shaft and the rotor and obtaining power to transport at least a portion of the airflow in the second chamber to the first chamber through the connecting hole.

[0006] According to one aspect of the embodiments of this application, there are multiple connecting holes, which are distributed circumferentially along the output shaft, and each connecting hole is disposed through the rotor support of the rotor in the axial direction of the output shaft.

[0007] According to one aspect of the embodiments of this application, the centers of a plurality of connecting holes are located on a first pitch circle, the turbulence member is coaxially disposed with the output shaft and extends a predetermined length radially along the output shaft, and the maximum radial dimension of the turbulence member is greater than or equal to the radial dimension of the first pitch circle.

[0008] According to one aspect of the embodiments of this application, the gearbox further includes a conduit that passes through the output shaft and has one end connected to the input end of the gear system. The other end of the conduit protrudes from the housing and extends into the second chamber. A turbulence-disrupting component is supported on the conduit and rotatably connected to it.

[0009] According to one aspect of the embodiments of this application, the turbulence component includes a connecting sleeve and a plurality of fan blades disposed on the outer periphery of the connecting sleeve. The connecting sleeve is connected to at least one of the rotor and the output shaft. The connecting sleeve is disposed around the conduit and rotatably engages with the conduit.

[0010] According to one aspect of the embodiments of this application, the wind turbine generator set further includes a bearing disposed in a second chamber and located between the conduit and the turbulence-causing component, wherein the inner ring of the bearing is connected to the conduit and the outer ring of the bearing is connected to the connecting sleeve.

[0011] According to one aspect of the embodiments of this application, the connecting sleeve includes a sleeve body and a connecting flange located on the side of the sleeve body facing the gearbox in the axial direction of the output shaft. The connecting flange is provided protruding from the outer peripheral surface of the sleeve body. The sleeve body is rotatably engaged with the conduit. The connecting flange is stacked with the rotor and connected to each other.

[0012] According to one aspect of the present application, the wind turbine generator set further includes a fastener that passes sequentially through the turbulence-disrupting component, the rotor, and the output shaft, and detachably connects the turbulence-disrupting component, the rotor, and the output shaft to each other.

[0013] According to one aspect of the embodiments of this application, the housing includes a main body and a cover. The cover is connected to the main body and is disposed around the output shaft. The cover is sealed to the generator and encloses it to form a first chamber.

[0014] According to one aspect of the embodiments of this application, along the radial direction of the output shaft, the housing cover and the generator sealing fit position are located between the output shaft and the connecting hole.

[0015] According to one aspect of the present application, a cooling chamber communicating with a first chamber is formed between the rotor and the stator, and an air inlet communicating with the cooling chamber is provided on at least one of the rotor and the stator. The generator also includes a cooling fan that communicates with the cooling chamber and is capable of drawing air from the cooling chamber so that external airflow can enter the cooling chamber through the air inlet.

[0016] According to the embodiments of this application, the wind turbine generator set includes a gearbox and a generator. The gearbox includes a housing, a gear train disposed within the housing, and an output shaft connected to the output end of the gear train. The generator is connected to the housing to form a first chamber. Since the generator has a second chamber and a connecting hole connecting the second chamber and the first chamber, when the wind turbine generator set is working, even if the cooling system or other structures cause negative pressure in the first chamber, the turbulence component is disposed in the second chamber and connected to at least one of the output shaft and the rotor to obtain power. This allows at least part of the airflow in the second chamber to be transported to the first chamber through the connecting hole, thereby increasing the pressure in the first chamber, reducing the probability of oil leakage at the gearbox housing and the generator seal, and improving the safety performance of the wind turbine generator set. Furthermore, the turbulence component obtains power from at least one of the output oil injection and the rotor, eliminating the need for an external power source and preventing the introduction of increased self-consumption. Attached Figure Description

[0017] The features, advantages, and technical effects of exemplary embodiments of this application will now be described with reference to the accompanying drawings.

[0018] Figure 1 This is a schematic diagram of the overall structure of a wind turbine generator set according to an embodiment of this application;

[0019] Figure 2 This is a partial structural diagram of one embodiment of this application;

[0020] Figure 3 yes Figure 2 A magnified view of a section at point A in the middle;

[0021] Figure 4 This is a schematic diagram of the structure of a turbulence-disrupting component according to an embodiment of this application.

[0022] in:

[0023] 10-Gearbox; 11-Box housing; 111-Main body; 112-Box cover; 12-Gear train; 13-Output shaft; 14-Cable conduit; 15-Input shaft;

[0024] 20-Generator; 21-Rotor; 22-Stator; 23-Second Chamber; 24-Connecting Hole; 25-Cooling Chamber; 26-Air Inlet; 27-Cooling Fan;

[0025] 30 - spoiler component; 31 - connecting sleeve; 311 - sleeve body; 312 - connecting flange; 32 - fan blade;

[0026] 40-First chamber; 50-Bearing; 60-Fastener; 70-Impeller; 71-Hub; 72-Blade; 80-Nacelle; 90-Tower;

[0027] X - Axial direction; Y - Radial direction.

[0028] In the accompanying drawings, the same parts use the same reference numerals. The drawings are not drawn to scale. Detailed Implementation

[0029] The features and exemplary embodiments of various aspects of this application will now be described in detail. Numerous specific details are set forth in the following detailed description to provide a comprehensive understanding of this application. However, it will be apparent to those skilled in the art that this application can be implemented without requiring some of these specific details. The following description of embodiments is merely intended to provide a better understanding of this application by illustrating examples. In the accompanying drawings and the following description, at least some well-known structures and techniques are not shown to avoid unnecessarily obscuring the application; and, for clarity, the dimensions of some structures may be exaggerated. Furthermore, the features, structures, or characteristics described below can be combined in any suitable manner in one or more embodiments.

[0030] The directional terms used in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of the wind turbine generator set of this application. It should also be noted in the description of this application that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0031] To better understand this application, the following will be combined with... Figures 1 to 4 The wind turbine generator set according to the embodiments of this application will be described in detail.

[0032] Please see Figure 1 This application provides a wind turbine generator set, which includes a tower 90, a nacelle 80, a generator 20, a gearbox 10, and an impeller 70. The tower 90 is connected to the wind turbine foundation, and the nacelle 80 is located at the top of the tower 90. The nacelle 80 includes a base and can be connected to the tower 90 through the base.

[0033] The generator 20 is connected to the housing 11 and forms a first chamber 40. The impeller 70 includes a hub 71 and blades 72. The hub 71 is connected to the input shaft 15 of the gear system 12. When wind energy acts on the blades 72, the blades 72 drive the hub 71 to rotate and transmit the kinetic energy converted from wind energy to the gearbox 10. After the gearbox 10 speeds up or slows down the speed, the energy is transmitted to the output shaft 13, and the output shaft 13 drives the rotor 21 of the generator 20 to rotate, converting wind energy into electrical energy.

[0034] To ensure that the temperature of the generator windings and magnets is controlled within a certain range during wind turbine operation, a cooling system is typically installed. Direct air cooling can be used, creating a negative pressure inside the nacelle 80 by drawing in ambient air. This air then enters the generator 20 through the generator's air inlet, cooling the rotor 21 and stator 22 before being discharged from the nacelle 80 through the generator's air outlet. In the integrated design of the gearbox 10 and generator 20, the first chamber 40 formed between the high-speed end of the gearbox 10 and the generator 20 is under negative pressure when the generator 20's cooling fan 27 is running, as the fan operates by suction. This negative pressure increases the risk of leakage, allowing lubricating oil from the gearbox 10 to enter the generator 20.

[0035] Therefore, in order to improve the safety performance of the wind turbine generator set, the wind turbine generator set provided in this application embodiment has a gearbox 10 including a housing 11, a gear train 12 disposed within the housing 11, and an output shaft 13 connected to the output end of the gear train 12. The generator 20 is connected to the housing 11 and forms a first chamber 40. The generator 20 includes a rotor 21 and a stator 22 that are rotatably coupled. The stator 22 is connected to the housing 11, and the rotor 21 is connected to the output shaft 13. The generator 20 has a second chamber 23 and a connecting hole 24 connecting the second chamber 23 and the first chamber 40. Furthermore, the wind turbine generator set also includes a turbulence-disrupting component 30, which is disposed in the second chamber 23. The turbulence-disrupting component 30 is connected to at least one of the output shaft 13 and the rotor 21 and obtains power to transport at least a portion of the airflow in the second chamber 23 to the first chamber 40 through the connecting hole 24.

[0036] Optionally, the gearbox 10 housing 11 can be a hollow box-shaped structure with both ends open in the axial direction X. The gearbox 10 housing 11 can be connected to the stator 22 bracket to form a first chamber 40 together with the stator 22 bracket.

[0037] Optionally, the gear system 12 may include a multi-stage gear. The input end of the gear system 12 may be connected to an input shaft 15, which is connected to the hub 71 to obtain the kinetic energy of the hub 71 and transmit it to the output shaft 13 after multi-stage speed increase or deceleration, so as to drive the rotor 21 and the turbulence component 30 to rotate.

[0038] Optionally, the generator 20 may adopt an inner rotor and outer stator configuration. Of course, the generator 20 may also adopt an outer rotor and inner stator configuration. For example, in order to better understand this application, the wind turbine generator set provided in the embodiments of this application will be described below in the form of an inner rotor and outer stator configuration.

[0039] Optionally, the output shaft 13 is connected to the support of the rotor 21 to transmit power to the support of the rotor 21 and drive the rotor 21 as a whole to rotate relative to the stator 22.

[0040] Optionally, the second chamber 23 formed within the generator 20 can be located inside the rotor 21, and in some examples, it can also be located inside the stator 22.

[0041] Optionally, the number of connecting holes 24 can be one, or more than two, depending on the size of the connecting holes 24 and the pressure adjustment requirements of the first chamber 40. For example, when the generator 20 has an inner rotor and outer stator structure, the connecting holes 24 can be provided on the rotor 21, for example, on the rotor 21 support.

[0042] Optionally, the turbulence component 30 can be connected to only one of the output shaft 13 and the rotor 21 to obtain power. Of course, the turbulence component 30 can also be connected to both the output shaft 13 and the rotor 21 simultaneously to obtain power.

[0043] Optionally, the turbulence component 30 can be a fan, turbine, or other device that can turbulent the airflow in the second chamber 23 as it rotates with the output shaft 13 and the rotor 21, thereby providing power to the airflow in the second chamber 23 so that it flows into the first chamber 40 through the connecting hole 24.

[0044] The wind turbine generator set provided in this application embodiment includes a gearbox 10 and a generator 20. The gearbox 10 includes a housing 11, a gear train 12 disposed within the housing 11, and an output shaft 13 connected to the output end of the gear train 12. The generator 20 is connected to the housing 11 to form a first chamber 40. Since the generator 20 has a second chamber 23 and a connecting hole 24 connecting the second chamber 23 and the first chamber 40, when the wind turbine generator set is working, even if the cooling system or other structures cause negative pressure in the first chamber 40, due to turbulence... The component 30 is disposed in the second chamber 23 and connected to at least one of the output shaft 13 and the rotor 21 to obtain power. It can transport at least part of the airflow in the second chamber 23 to the first chamber 40 through the connecting hole 24, thereby increasing the pressure in the first chamber 40, reducing the probability of oil leakage at the seal between the gearbox 10 housing 11 and the generator 20, and improving the safety performance of the wind turbine generator set. Furthermore, the turbulence component 30 obtains power from at least one of the output shaft and the rotor 21, without the need for an external power source, and does not introduce an increase in self-consumption.

[0045] In some alternative embodiments, there are multiple connecting holes 24, which are distributed circumferentially along the output shaft 13, and each connecting hole 24 is disposed through the rotor support of the rotor 21 in the axial direction X of the output shaft 13.

[0046] Alternatively, the number of connecting holes 24 can be two, three, or even more.

[0047] Optionally, each connecting hole 24 can be circular, elliptical, or polygonal in shape.

[0048] Optionally, the shape and size of each connecting hole 24 can be the same.

[0049] Optionally, a plurality of connecting holes 24 are spaced apart and evenly arranged in the circumferential direction of the output shaft 13, and the included angle between each pair of adjacent connecting holes 24 is equal.

[0050] The wind turbine generator set provided in this application embodiment has multiple connecting holes 24 and the multiple connecting holes 24 are distributed at intervals along the circumference of the output shaft 13. Under the action of the turbulence component 30, the airflow in the second chamber 23 can enter through the multiple connecting holes 24, thereby increasing the pressure in the first chamber 40, ensuring the uniformity of pressure regulation, and reducing the probability of oil leakage at the seal between the gearbox 10 housing 11 and the generator 20.

[0051] In some alternative embodiments, the centers of the plurality of connecting holes 24 are located on a first pitch circle, which is optionally coaxially arranged with the output shaft 13. The turbulence-disrupting component 30 is coaxially arranged with the output shaft 13 and extends a predetermined length along the radial direction Y of the output shaft 13. Along the radial direction Y, the maximum radial dimension of the turbulence-disrupting component 30 is greater than or equal to the radial dimension of the first pitch circle.

[0052] The wind turbine generator set provided in this application embodiment, by having the centers of multiple connecting holes 24 located on the first pitch circle, and limiting the maximum radial dimension of the turbulence component 30 along the radial direction Y to be greater than or equal to the radial dimension of the first pitch circle, allows the turbulence component 30 to cover the connecting holes 24 during rotation along the axial direction of the output shaft 13. This allows the airflow with a certain velocity generated in the second chamber 23 under the action of the turbulence component 30 to directly and quickly enter the first chamber 40 through the connecting holes 24, thereby increasing the air pressure in the first chamber 40. This makes the air pressure in the first chamber 40 similar to that in the second chamber 23, preventing the rotor support and other structures of the generator 20 from obstructing the turbulent airflow in the second chamber 23, improving the timeliness of air pressure regulation in the first chamber 40, and reducing the probability of oil leakage.

[0053] In some alternative embodiments, the gearbox 10 further includes a conduit 14 that passes through the output shaft 13 and is connected at one end to the input end of the gear train 12. The other end of the conduit 14 protrudes from the housing 11 and extends into the second chamber 23. The turbulence-disrupting component 30 is supported on the conduit 14 and is rotatably connected to the conduit 14.

[0054] Optionally, the radial dimension of the conduit 14 is smaller than the radial dimension of the output shaft 13. Optionally, the output shaft 13 may have a hole extending through it along its own axial direction X. The conduit 14 passes through the hole of the output shaft 13. Since the conduit 14 is connected to the input end of the gear train 12, there is a difference between the rotational speed of the conduit 14 and the rotational speed of the output shaft 13. A connecting bearing may be provided between the conduit 14 and the output shaft 13 in the radial direction Y of the output shaft 13 to ensure that the two can run smoothly at their respective rotational speeds.

[0055] Optionally, the conduit 14 is hollow, which can be used to bring out cables for some of the drive pitch motion devices inside the hub 71.

[0056] Optionally, one end of the conduit 14 can be connected to the input shaft 15 of the gear train 12, and the length of the portion of the other end of the conduit 14 that protrudes into the second chamber 23 in the axial direction X can be greater than the length of the turbulence component 30 in the axial direction X.

[0057] Optionally, the turbulence-disrupting component 30 can be rotatably connected to the conduit 14 by means of clearance fit, or it can be rotatably connected to the conduit 14 by means of a sliding sleeve, bearing, etc.

[0058] Optionally, the conduit 14 and the output shaft 13 can be coaxially arranged.

[0059] The wind turbine generator set provided in this application embodiment, by including a conduit 14 in the gearbox 10, facilitates the routing of cables for some drive pitch control devices within the hub 71. Furthermore, the engagement between the turbulence-inducing component 30 and the conduit 14 ensures that the turbulence-inducing component 30 rotates with at least one of the output shaft 13 and the rotor 21, thereby regulating the air pressure within the first chamber 40. Simultaneously, the conduit 14 provides support for the turbulence-inducing component 30, eliminating the need for an additional bracket structure for its installation. This ensures the smooth operation of the turbulence-inducing component 30 during rotation and reduces the retrofitting cost of the wind turbine generator set.

[0060] like Figure 3 , Figure 4 As shown, in some optional embodiments, the turbulence component 30 includes a connecting sleeve 31 and a plurality of fan blades 32 disposed on the outer periphery of the connecting sleeve 31. The connecting sleeve 31 is connected to at least one of the rotor 21 and the output shaft 13. The connecting sleeve 31 is disposed around the conduit 14 and rotates in cooperation with the conduit 14.

[0061] Optionally, the connecting sleeve 31 can be connected to at least one of the rotor 21 and the output shaft 13 by welding or other means, or by bolt fastening.

[0062] Optionally, multiple fan blades 32 are spaced apart in the circumferential direction of the output shaft 13, and optionally, the included angle between two adjacent fan blades 32 is equal.

[0063] Optionally, the connecting sleeve 31 can be fitted around the outer periphery of the conduit 14 and rotatably connected to the conduit 14.

[0064] The wind turbine generator set provided in this application embodiment has a turbulence-disrupting component 30 with the above-described structure. It can be connected to one of the rotor 21 and the output shaft 13 via the connecting sleeve 31 and can rotate with the conduit 14. The arrangement of multiple fan blades 32 allows them to rotate with the connecting sleeve 31, thereby disturbing the airflow in the second chamber 23 and transporting the airflow in the second chamber 23 to the first chamber 40. The structure is simple and can ensure the air pressure regulation requirements in the first chamber 40.

[0065] In some alternative embodiments, the wind turbine generator set further includes a bearing 50 disposed in the second chamber 23 and located between the conduit 14 and the turbulence-disrupting component 30, with the inner ring of the bearing 50 connected to the conduit 14 and the outer ring of the bearing 50 connected to the connecting sleeve 31.

[0066] Optionally, there can be one bearing 50 between the baffle component 30 and the conduit 14. Of course, when the dimension of the baffle component 30 along the axial direction X is large, the number of bearings 50 between the baffle component 30 and the conduit 14 can also be two or more, with the two or more bearings 50 distributed sequentially along the axial direction X.

[0067] The wind turbine generator set provided in this application embodiment, by setting a bearing 50 and limiting the cooperation method between the bearing 50 and the turbulence-disrupting component 30, allows the turbulence-disrupting component 30 and the conduit 14 to work at different speeds. This ensures that the conduit 14 supports the turbulence-disrupting component 30, while also preventing the conduit 14 and the turbulence-disrupting component 30 from interfering with each other when working at different speeds.

[0068] In some optional embodiments, the connecting sleeve 31 includes a sleeve body 311 and a connecting flange 312 located on the side of the sleeve body 311 facing the gearbox 10 along the axial direction X of the output shaft 13. The connecting flange 312 protrudes from the outer peripheral surface of the connecting sleeve 31. The sleeve body 311 is rotatably engaged with the conduit 14, and the connecting flange 312 is stacked with and connected to the rotor 21. Optionally, a plurality of fan blades 32 may be connected to the outer periphery of the sleeve body 311.

[0069] Optionally, a bearing 50 is provided between the sleeve body 311 and the conduit 14, and the two rotate and cooperate with each other through the bearing 50.

[0070] Optionally, the connecting flange 312 protrudes radially (Y) from the outer circumferential surface of the connecting sleeve 31 on the output shaft 13. The connecting flange 312 has a flange hole extending axially (X) for fasteners to be inserted.

[0071] Optionally, the connecting flange 312 and the rotor 21 are stacked and can be connected by fasteners such as bolts.

[0072] The wind turbine generator set provided in this application embodiment adopts the above-described structure for the connecting sleeve 31, which allows the sleeve body 311 to rotate and engage with the conduit 14 to obtain support for the conduit 14. Simultaneously, the corresponding connecting flange 312 can be stacked and connected to the rotor 21's support, reducing the difficulty of connecting the connecting sleeve 31 to the rotor 21's support.

[0073] In some alternative embodiments, the wind turbine generator set also includes a fastener 60 that passes sequentially through the turbulence member 30, the rotor 21 and the output shaft 13 and detachably connects the turbulence member 30, the rotor 21 and the output shaft 13 to each other.

[0074] Optionally, the turbulence component 30 is synchronously connected to both the rotor 21 and the output shaft 13 via fasteners 60.

[0075] Optionally, the fastener 60 can pass through the connecting flange 312 of the turbulence component 30, the bracket of the rotor 21, and the end face of the output shaft 13 in the axial direction X, and detachably connect the three.

[0076] The wind turbine generator set provided in this application embodiment connects the turbulence-disrupting component 30, rotor 21, and output shaft 13 using the same set of fasteners 60. This eliminates the need for additional drilling on the rotor 21 and output shaft 13 to connect the turbulence-disrupting component 30, reducing the difficulty of modifying the wind turbine generator set and ensuring the strength of the rotor 21 and output shaft 13 themselves. Furthermore, the detachable connection of the turbulence-disrupting component 30 facilitates its disassembly, assembly, and replacement.

[0077] In some optional embodiments, the wind turbine generator set provided in this application includes a housing 11 that further includes a body part 111 and a cover 112. The cover 112 is connected to the body part 111 and is arranged around the output shaft 13. The cover 112 is sealed to the generator 20 and encloses the first chamber 40.

[0078] The wind turbine generator set provided in this application embodiment has a housing 11 with the above-described structure, which can protect the gear train 12 through the main body 111, and can also connect and seal with the generator 20 through the housing cover 112 to ensure the connection requirements with the generator 20.

[0079] As some alternative embodiments, along the radial Y of the output shaft 13, the housing cover 112 is located between the output shaft 13 and the connecting hole 24 in a sealing fit with the generator 20.

[0080] Optionally, along the radial Y direction, the position of the connecting hole 24 is further away from the axis of the output shaft 13 relative to the sealing fit position.

[0081] The above settings ensure the airflow regulation within the first chamber 40 and prevent the connecting hole 24 from affecting the sealing performance of the sealing mating position, thereby further reducing the probability of oil leakage while ensuring the air pressure regulation requirements.

[0082] In some optional embodiments, the wind turbine generator set provided in this application has a cooling chamber 25 formed between the rotor 21 and the stator 22, which communicates with the first chamber 40. At least one of the rotor 21 and the stator 22 is provided with an air inlet 26 communicating with the cooling chamber 25. The generator 20 also includes a cooling fan 27, which communicates with the cooling chamber 25 and is able to draw air from the cooling chamber 25 so that external airflow can enter the cooling chamber 25 through the air inlet 26.

[0083] Optionally, the cooling chamber 25 may be formed between the support of the rotor 21 and the support of the stator 22.

[0084] Optionally, an air inlet 26 communicating with the cooling chamber 25 can be provided on one of the rotor 21 and the stator 22, and the cooling fan 27 can be connected to the stator 22 of the generator 20 and used to draw airflow from the cooling chamber 25.

[0085] During operation, the cooling fan 27 in the wind turbine generator set provided in this application embodiment can exhaust the airflow in the cooling chamber 25 to the outside of the generator 20, thereby reducing the air pressure in the cooling chamber 25 and the first chamber 40. Correspondingly, the airflow from outside the generator 20 will be supplemented into the cooling chamber 25 through the air inlet 26, achieving cooling of components such as the rotor 21 and stator 22 of the generator 20. The second chamber 23 can be connected to the cooling chamber 25, or it can be connected to the nacelle 80 outside the generator 20. When the turbulence component 30 rotates with at least one of the output shaft 13 and the rotor 21, it can transport the airflow in the second chamber 23 to the first chamber 40 to increase the air pressure in the first chamber 40. While meeting the cooling requirements of the generator 20, it also helps to maintain the air pressure balance between the first chamber 40 and the generator 20 side as much as possible, reducing the risk of oil leakage.

[0086] Furthermore, the turbulence-disrupting component 30 can disturb the airflow, allowing the airflow path in the second chamber 23 to flow freely, which can supplement the cooling system and further reduce the temperature of the generator 20.

[0087] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A wind turbine generator set, characterized in that, include: The gearbox (10) includes a housing (11), a gear train (12) disposed within the housing (11), and an output shaft (13) connected to the output end of the gear train (12); A generator (20) is connected to the housing (11) and forms a first chamber (40). The generator (20) includes a rotor (21) and a stator (22) that are rotatably engaged. The stator (22) is connected to the housing (11), and the rotor (21) is connected to the output shaft (13). The generator (20) has a second chamber (23) and a communication hole (24) connecting the second chamber (23) and the first chamber (40). A turbulence-disrupting component (30) is disposed in the second chamber (23). The turbulence-disrupting component (30) is connected to and powered by at least one of the output shaft (13) and the rotor (21) to deliver at least part of the airflow in the second chamber (23) to the first chamber (40) through the connecting hole (24).

2. The wind turbine generator set according to claim 1, characterized in that, The number of the connecting holes (24) is multiple, and the multiple connecting holes (24) are distributed circumferentially along the output shaft (13). Each connecting hole (24) is disposed through the rotor support of the rotor (21) in the axial direction (X) of the output shaft (13).

3. The wind turbine generator set according to claim 2, characterized in that, The centers of the plurality of connecting holes (24) are located on the first pitch circle. The turbulence component (30) is coaxially arranged with the output shaft (13) and extends a predetermined length along the radial (Y) direction of the output shaft (13). Along the radial (Y) direction, the maximum radial dimension of the turbulence component (30) is greater than or equal to the radial dimension of the first pitch circle.

4. The wind turbine generator set according to claim 1, characterized in that, The gearbox (10) also includes a conduit (14) that passes through the output shaft (13) and is connected at one end to the input end of the gear train (12). The other end of the conduit (14) protrudes from the housing (11) and extends into the second chamber (23). The turbulence-disrupting component (30) is supported on the conduit (14) and is rotatably connected to the conduit (14).

5. The wind turbine generator set according to claim 4, characterized in that, The turbulence component (30) includes a connecting sleeve (31) and a plurality of fan blades (32) disposed on the outer periphery of the connecting sleeve (31). The connecting sleeve (31) is connected to at least one of the rotor (21) and the output shaft (13). The connecting sleeve (31) is disposed around the conduit (14) and rotates in cooperation with the conduit (14).

6. The wind turbine generator set according to claim 5, characterized in that, The wind turbine generator set also includes a bearing (50), which is disposed in the second chamber (23) and located between the conduit (14) and the turbulence component (30). The inner ring of the bearing (50) is connected to the conduit (14) and the outer ring of the bearing (50) is connected to the connecting sleeve (31).

7. The wind turbine generator set according to claim 5, characterized in that, The connecting sleeve (31) includes a sleeve body (311) and a connecting flange (312) located on the side of the output shaft (13) facing the gearbox (10) in the axial direction (X) of the sleeve body (311). The connecting flange (312) protrudes from the outer peripheral surface of the sleeve body (311). The sleeve body (311) is rotatably engaged with the conduit (14). The connecting flange (312) is stacked with the rotor (21) and connected to each other.

8. The wind turbine generator set according to any one of claims 1 to 7, characterized in that, The wind turbine generator set also includes a fastener (60) that passes sequentially through the turbulence-disrupting component (30), the rotor (21), and the output shaft (13) and detachably connects the turbulence-disrupting component (30), the rotor (21), and the output shaft (13) to each other.

9. The wind turbine generator set according to claim 8, characterized in that, The housing (11) includes a main body (111) and a cover (112). The cover (112) is connected to the main body (111) and is arranged around the output shaft (13). The cover (112) is sealed to the generator (20) and encloses it to form the first chamber (40).

10. The wind turbine generator set according to claim 9, characterized in that, Along the radial (Y) direction of the output shaft (13), the sealing fit position of the cover (112) and the generator (20) is located between the output shaft (13) and the connecting hole (24).

11. The wind turbine generator set according to claim 8, characterized in that, A cooling chamber (25) communicating with the first chamber (40) is formed between the rotor (21) and the stator (22). At least one of the rotor (21) and the stator (22) is provided with an air inlet (26) communicating with the cooling chamber (25). The generator (20) also includes a cooling fan (27), which is communicating with the cooling chamber (25) and can draw air from the cooling chamber (25) so that external airflow can enter the cooling chamber (25) through the air inlet (26).

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