CN219262575U

CN219262575U - Wind generating set

Info

Publication number: CN219262575U
Application number: CN202320023665.9U
Authority: CN
Inventors: 王江乔
Original assignee: Shanghai Electric Wind Power Group Co Ltd
Current assignee: Shanghai Electric Wind Power Group Co Ltd
Priority date: 2023-01-04
Filing date: 2023-01-04
Publication date: 2023-06-27
Anticipated expiration: 2033-01-04

Abstract

The application provides a wind generating set. The wind generating set comprises a wind wheel, a driving chain, a generator and a tower, wherein the generator comprises a rotor and a stator formed by a part of the tower, the wind wheel is connected to the rotor through driving chain transmission, the driving chain comprises a main shaft and a steering transmission mechanism, the wind wheel is arranged at one end of the main shaft, the rotation axis of the wind wheel is at a certain angle with the central axis of the tower, and the steering transmission mechanism is used for changing the rotation direction of the main shaft into the rotation direction of the rotor. The wind generating set can improve the material utilization rate and reduce the yaw torque.

Description

Wind generating set

Technical Field

The application relates to the technical field of wind power generation, in particular to a wind generating set.

Background

Along with the gradual exhaustion of energy sources such as coal, petroleum and the like, people pay more attention to the utilization of renewable energy sources. Wind energy is becoming increasingly important worldwide as a clean renewable energy source. With the continuous development of wind power technology, wind power generation sets are increasingly applied to power systems. Wind power generation sets are large-scale devices that convert wind energy into electrical energy, and are typically located in areas where wind energy resources are abundant.

The wind generating set comprises a wind wheel and a generator. The wind wheel rotates under the action of wind force, kinetic energy of wind is converted into mechanical energy of the wheel shaft, and the generator rotates to generate electricity under the driving of the wheel shaft. Existing generator arrangements typically include doubly fed/squirrel cage generator arrangements, direct drive arrangements, and other arrangements. At present, the structure of the wind generating set is mature, but as the power and load of the wind generating set are larger and larger, the structure of the wind generating set is larger and heavier, and the cost is increased. There are also wind power generators in which the entire generator is arranged in the tower of the wind power generator to reduce the weight of the top of the wind power generator. However, this blocks the passage of the tower, causing serious problems such as inconvenient maintenance, blockage of personnel passages, etc.

Disclosure of Invention

The utility model aims at providing a wind generating set can improve material utilization, reduces yaw torque.

One aspect of the present application provides a wind turbine generator set. The wind generating set comprises a wind wheel, a driving chain, a generator and a tower, wherein the generator comprises a rotor and a stator formed by a part of the tower, the wind wheel is connected to the rotor through driving chain transmission, the driving chain comprises a main shaft and a steering transmission mechanism, the wind wheel is installed at one end of the main shaft, the rotation axis of the wind wheel and the central axis of the tower form a certain angle, and the steering transmission mechanism is used for transforming the rotation direction of the main shaft to the rotation direction of the rotor.

Further, the steering gear includes a pair of intermeshing bevel gears.

Further, one of the bevel gear pairs is engaged with the main shaft, and the other of the bevel gear pairs is engaged with the rotating shaft of the rotor.

Further, the drive train further comprises a gear box arranged between the main shaft and the steering transmission mechanism.

Further, the rotor is arranged outside the tower.

Further, the rotor is arranged inside the tower.

Further, the upper end of the tower constitutes the stator, and the rotor is mounted on the upper end of the tower.

Further, the rotor is rotatably mounted to the tower by a rotor support bearing.

Further, the drive chain comprises a drive chain bracket rotatably mounted to the top end of the tower through a yaw bearing.

Further, the drive chain further comprises a bearing seat arranged on the drive chain support, and the main shaft is rotatably arranged in the bearing seat through a main bearing.

The wind generating set of the embodiment of the application is characterized in that the stator of the generator is formed by a part of the tower, so that the original tower can be used as the stator structure of the generator, materials are fully utilized, and the material utilization rate is improved.

Moreover, the wind generating set of the embodiment of the application can convert the torque of the wind wheel to be consistent with the torque direction of the generator by adopting the steering transmission mechanism, so that the rotation axis of the generator can be arranged to be coincident with the central axis of the tower, the whole yaw moment of inertia can be reduced, and the yaw torque can be reduced. In addition, because the stator of the generator is combined with the tower, the cable can be connected with the stator, and the cable can not rotate when the head of the wind generating set rotates, so that the problem of cable twisting and cable releasing can be avoided during design, and the design is simplified.

Drawings

Fig. 1 is a schematic perspective view of a wind turbine generator system according to an embodiment of the present application.

FIG. 2 is a schematic cross-sectional view of a wind turbine generator system according to one embodiment of the present application.

FIG. 3 is a schematic cross-sectional view of a wind turbine generator system according to another embodiment of the present application.

FIG. 4 is a schematic cross-sectional view of a wind turbine generator system according to yet another embodiment of the present application.

FIG. 5 is a schematic cross-sectional view of a wind turbine generator system according to yet another embodiment of the present application.

Detailed Description

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus consistent with some aspects of the present application as detailed in the accompanying claims.

The terminology used in the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs. The terms "first," "second," and the like in the description and in the claims, are not used for any order, quantity, or importance, but are used for distinguishing between different elements. Likewise, the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. "plurality" or "plurality" means two or more. Unless otherwise indicated, the terms "front," "rear," "lower," and/or "upper" and the like are merely for convenience of description and are not limited to one location or one spatial orientation. The word "comprising" or "comprises", and the like, means that elements or items appearing before "comprising" or "comprising" are encompassed by the element or item recited after "comprising" or "comprising" and equivalents thereof, and that other elements or items are not excluded. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any or all possible combinations of one or more of the associated listed items.

The embodiment of the application provides a wind generating set. Fig. 1 discloses a perspective view of a wind power generation set 100 according to an embodiment of the present application, and fig. 2 discloses a cross-sectional view of a wind power generation set 100 according to an embodiment of the present application. As shown in fig. 1 and 2, a wind power generation set 100 according to an embodiment of the present application includes a wind wheel 110, a drive train 120, a generator 130, and a tower 140. The generator 130 includes a rotor 131 and a stator, wherein the stator is formed by a portion of the tower 140. The rotational axis of the generator 130 coincides with the central axis of the tower 140. Wind wheel 110 may be drivingly connected to rotor 131 by drive train 120. The drive chain 120 includes a main shaft 121 and a steering transmission mechanism. The wind wheel 110 is installed at one end of the main shaft 121, the rotation axis of the wind wheel 110 forms a certain angle with the central axis of the tower 140, and the steering transmission mechanism can be used for transforming the rotation direction of the main shaft 121 to the rotation direction of the rotor 131.

The rotor 131 may be rotatably mounted to the tower 140 by a rotor support bearing 133. In some embodiments, the upper end of the tower 140 constitutes a stator, and the rotor 131 is mounted at the upper end of the tower 140. The wind generating set 100 can enable the production station and the use station of the generator 130 to be consistent, so that the reversing requirement of the component in the manufacturing process can be reduced, and the error in the manufacturing process is small, and the error is not easy to be brought into the actual operation of the component. Moreover, the stress condition of the generator 130 is better, and the air gap can be reduced, so that the cost can be reduced.

According to the wind generating set 100, the stator of the generator 130 is overlapped with the tower barrel 140, and the stator is formed by a part of the tower barrel 140, so that the original tower barrel 140 can be used as a stator structure of the generator 130, materials are fully utilized, and the material utilization rate is improved.

Moreover, by adopting the steering transmission mechanism, the wind generating set 100 of the embodiment of the application can convert the torque of the wind wheel to be consistent with the torque direction of the generator, so that the rotation axis of the generator 130 can be arranged to be coincident with the central axis of the tower 140, thereby reducing the yaw moment of inertia and reducing the yaw torque. In addition, since the stator of the generator 130 is combined with the tower 140, the cable can be connected with the stator, and the cable can not rotate when the nose of the wind generating set 100 rotates, so that the problem of cable twisting and cable untwisting can not be considered even in design, and the design is simplified.

The drive chain 120 includes a drive chain bracket 124, the drive chain bracket 124 being rotatably mounted to the top end of the tower 140 by yaw bearings 150. The drive chain 120 further includes bearing blocks 125 provided on the drive chain bracket 124, and in one embodiment, a pair of bearing blocks 125 are provided at intervals along the length direction of the main shaft 121, and main bearings (not numbered) are provided in the bearing blocks 125, through which the main shaft 121 can be rotatably installed in the bearing blocks 125.

In some embodiments, the steering gear of the present application may include intermeshing bevel gear pairs 122. The bevel gear may be, for example, a spiral bevel gear. The present application may shift torque direction by bevel gear pair 122. Bevel gears are commonly used for transmission between two shafts at an angle of around 90 degrees. In the embodiment of the present application, when the bevel gear pair 122 is applied to the wind generating set 100, the torque generated by the wind wheel 110 may be converted to be consistent with the central axis of the tower 140, that is, the direction of the torque of the generator 130. Moreover, bevel gears (particularly spiral bevel gears) can efficiently transmit torque and accommodate drive chain deformations.

In the embodiment shown in fig. 2, the rotor 131 is disposed outside the tower 140, and the rotor 131 may be rotatably mounted outside the tower 140 by a rotor support bearing 133. Bevel gear pair 122 is disposed between main shaft 121 and rotor 131 of generator 130. Bevel gear pair 122 may provide a gear ratio such that the rotational speed of rotor 110 matches the rotational speed of rotor 131 of generator 130. One of the bevel gear pairs 122 is engaged with the main shaft 121, for example, one of the bevel gear pairs 122 may be installed at the other end of the main shaft 121, and the other of the bevel gear pairs 122 is engaged with the rotation shaft of the rotor 131. Thus, the rotation direction of the main shaft 121 can be adjusted to coincide with the rotation direction of the rotor 131 by the bevel gear pair 122.

The wind generating set 100 of the embodiment of the application adopts the external rotor direct-drive structure, so that the whole arrangement is more convenient, the traditional structure is changed minimally, and the maintenance can be performed from the outer side of the tower 140.

When the wind wheel 110 rotates, the rotation of the wind wheel 110 can drive the main shaft 121 to rotate, and the rotation of the main shaft 121 further drives the bevel gear pair 122 to rotate, so as to drive the rotor 131 of the generator 130 to rotate.

FIG. 3 discloses a schematic cross-sectional view of a wind power unit 100 according to another embodiment of the present application. As shown in fig. 3, the rotor 131 is disposed inside the tower 140, and the rotor 131 may be rotatably mounted inside the tower 140 through a rotor support bearing 133. Bevel gear pair 122 is disposed between main shaft 121 and rotor 131 of generator 130. One of the bevel gear pairs 122 is engaged with the main shaft 121, for example, one of the bevel gear pairs 122 may be mounted by a mounting flange at a position where the main shaft 121 is located between a pair of bearing blocks 125, and the other of the bevel gear pairs 122 is engaged with the rotation shaft of the rotor 131.

The wind generating set 100 of the embodiment of the application adopts the built-in rotor direct-drive structure, so that the whole arrangement is more convenient, the traditional structure is changed minimally, and the maintenance can be performed from the inside of the tower 140.

FIG. 4 discloses a schematic cross-sectional view of a wind power unit 100 according to a further embodiment of the present application. As shown in fig. 4, the rotor 131 is disposed inside the tower 140, and the rotor 131 may be rotatably mounted inside the tower 140 through a rotor support bearing 133. When the bevel gear pair 122 cannot provide a high gear ratio to meet the match between the rotational speed of the rotor 110 and the rotational speed of the rotor 131 of the generator 130, the drive train 120 of the wind turbine 100 of the present application may further comprise a gear box 123, the gear box 123 being arranged between the main shaft 121 and the steering gear. For example, a gear box 123 is provided between the main shaft 121 and the bevel gear pair 122. A gear case 123 is provided at the other end of the main shaft 121. One of the bevel gear pairs 122 mates with the output shaft 1230 of the gearbox 123, and the other of the bevel gear pairs 122 mates with the rotating shaft of the rotor 131. In one embodiment, the gearbox 123 is a step-up gearbox 123, thereby achieving speed-up.

The wind generating set 100 of the embodiment of the present application is a rotor built-in semi-direct-drive structure, and maintenance can be performed from the inside of the tower 140.

When the wind wheel 110 rotates, the rotation of the wind wheel 110 can drive the main shaft 121 to rotate, the rotation of the main shaft 121 drives the gear box 123 to rotate, and then drives the output shaft 1230 to rotate, and the rotation of the output shaft 1230 further drives the bevel gear pair 122 to rotate, so that the rotor 131 of the generator 130 can be driven to rotate.

FIG. 5 discloses a schematic cross-sectional view of a wind power unit 100 according to yet another embodiment of the present application. As shown in fig. 5, the rotor 131 is disposed at the outer side of the tower 140, and the rotor 131 may be rotatably installed at the outer side of the tower 140 through a rotor support bearing 133. In the present embodiment, the drive train 120 of the wind turbine 100 of the present application may further include a gear box 123, the gear box 123 being disposed between the main shaft 121 and the steering gear. For example, a gear box 123 is provided between the main shaft 121 and the bevel gear pair 122. A gear case 123 is provided at the other end of the main shaft 121. One of the bevel gear pairs 122 mates with the output shaft 1230 of the gearbox 123, and the other of the bevel gear pairs 122 mates with the rotating shaft of the rotor 131. In one embodiment, the gearbox 123 is a step-up gearbox 123, thereby achieving speed-up.

The wind generating set 100 of the embodiment of the present application is a rotor external semi-direct-drive structure, and maintenance can be performed from the outer side of the tower 140.

The wind generating set 100 provided by the embodiment of the application can improve the material utilization rate, reduce the yaw torque and simplify the design.

The foregoing description of the preferred embodiments of the present utility model is not intended to limit the utility model to the precise form disclosed, and any modifications, equivalents, improvements and alternatives falling within the spirit and principles of the present utility model are intended to be included within the scope of the present utility model.

Claims

1. A wind generating set, characterized in that: the wind wheel is connected to the rotor through transmission of the driving chain, the driving chain comprises a main shaft and a steering transmission mechanism, the wind wheel is installed at one end of the main shaft, the rotation axis of the wind wheel and the central axis of the tower are in a certain angle, and the steering transmission mechanism is used for changing the rotation direction of the main shaft to the rotation direction of the rotor.

2. The wind turbine of claim 1, wherein: the steering gear includes a pair of intermeshing bevel gears.

3. The wind turbine of claim 2, wherein: one of the bevel gear pairs is engaged with the main shaft, and the other of the bevel gear pairs is engaged with the rotating shaft of the rotor.

4. Wind power plant according to claim 1 or 2, characterized in that: the drive chain further comprises a gear box arranged between the main shaft and the steering transmission mechanism.

5. The wind turbine of claim 1, wherein: the rotor is arranged outside the tower.

6. The wind turbine of claim 1, wherein: the rotor is arranged inside the tower.

7. Wind power plant according to claim 5 or 6, wherein: the upper end of the tower tube forms the stator, and the rotor is arranged at the upper end of the tower tube.

8. The wind turbine of claim 1, wherein: the rotor is rotatably mounted to the tower by a rotor support bearing.

9. The wind turbine of claim 1, wherein: the drive chain comprises a drive chain support which is rotatably mounted at the top end of the tower through a yaw bearing.

10. The wind turbine of claim 9, wherein: the driving chain further comprises a bearing seat arranged on the driving chain support, and the main shaft is rotatably arranged in the bearing seat through a main bearing.