A semi-direct drive wind turbine generator set

Abstract

This invention relates to the field of wind power generation technology and discloses a semi-direct-drive wind turbine generator set. The semi-direct-drive wind turbine generator set includes a main shaft system, a gearbox, a generator, and a base. The main shaft system includes a main shaft and a base, with the main shaft rotatably mounted within the base. The gearbox includes a housing, with its front end rigidly connected to the rear end of the base. The generator includes a housing, with its front end rigidly connected to the rear end of the gearbox. The gearbox and generator form an integrated structure. Both the base and the integrated structure are rigidly mounted on the base. The semi-direct-drive wind turbine generator set provided by this invention rigidly connects the housing to the rear end of the base, and then rigidly mounts the base and the integrated system consisting of the gearbox and generator on the base. This allows the base to directly bear the total weight of the main shaft system and the integrated system, thereby preventing the weight of the generator from being directly added to the housing, preventing gearbox vibration, ensuring transmission balance, and improving the safety factor of the transmission chain.

Description

Technical Field

[0001] This invention relates to the field of wind power generation technology, and in particular to a semi-direct drive wind turbine generator set. Background Technology

[0002] Traditional doubly-fed wind turbine gearboxes typically use a torque arm elastic support fixing method, while semi-direct-drive gearboxes are generally integrated with the generator to form an integrated structure, meaning the generator's weight is directly added to the gearbox housing. Because the overall weight increases and the center of gravity shifts rearward after integration, if the traditional torque arm elastic support fixing method is still used, the center of gravity position relative to the elastic support point is a cantilever structure, which can easily lead to gearbox vibration, affecting transmission balance and reducing the safety factor of the drivetrain.

[0003] Therefore, there is an urgent need for a new type of semi-direct drive wind turbine generator to solve the above-mentioned technical problems. Summary of the Invention

[0004] The purpose of this invention is to provide a semi-direct drive wind turbine generator set that avoids the weight of the generator being directly attached to the gearbox housing, prevents gearbox vibration, ensures transmission balance, and improves the safety factor of the entire transmission chain.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A semi-direct-drive wind turbine generator set includes:

[0007] A spindle system, comprising a spindle and a base, wherein the spindle is rotatably disposed within the base;

[0008] A gearbox, including a housing, wherein the front end of the housing is rigidly connected to the rear end of the base;

[0009] A generator includes a housing, the front end of which is rigidly connected to the rear end of a gearbox, and the gearbox and the generator form an integrated structure.

[0010] The base, the seat body and the integrated structure are both rigidly mounted on the base.

[0011] As a preferred embodiment of the semi-direct drive wind turbine generator set, it also includes a flexible coupling, and the gearbox further includes a low-speed transmission module, with the main shaft and the low-speed transmission module being connected by the flexible coupling.

[0012] As a preferred embodiment of the semi-direct drive wind turbine generator set, the flexible coupling is a hydraulic flexible coupling.

[0013] As a preferred embodiment of the semi-direct drive wind turbine generator set, the gearbox is a high-megawatt gearbox.

[0014] As a preferred embodiment of the semi-direct drive wind turbine generator set, the housing is cylindrical.

[0015] As a preferred embodiment of the semi-direct drive wind turbine generator set, the front end of the housing is provided with a housing flange, the rear end of the base is provided with a base flange, and the housing flange and the base flange are rigidly connected.

[0016] As a preferred embodiment of the semi-direct drive wind turbine generator set, the housing flange and the base flange are rigidly connected by bolts.

[0017] As a preferred embodiment of the semi-direct drive wind turbine generator set, the main shaft system further includes a bearing disposed between the main shaft and the mounting body.

[0018] As a preferred embodiment of the semi-direct drive wind turbine generator set, the number of bearings is two.

[0019] As a preferred embodiment of the semi-direct drive wind turbine generator set, it also includes a hub and a wind turbine system, wherein the rear end of the hub is connected to the front end of the main shaft, and the wind turbine system is connected to the hub.

[0020] The beneficial effects of this invention are as follows:

[0021] The semi-direct drive wind turbine generator set provided by this invention rigidly connects the front end of the gearbox housing to the rear end of the base in the main shaft system, and rigidly connects the rear end of the gearbox housing to the front end of the generator housing. Then, the base and the integrated system composed of the gearbox and the generator are rigidly mounted on the base, so that the base directly bears the total weight of the main shaft system, gearbox and generator. This avoids the weight of the generator being directly added to the gearbox housing, prevents gearbox vibration, ensures the balance of transmission, and improves the safety factor of the entire transmission chain. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of the present invention and these drawings without creative effort.

[0023] Figure 1 This is a partial schematic diagram of a semi-direct drive wind turbine generator provided in an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the casing in the semi-direct drive wind turbine generator set provided in an embodiment of the present invention.

[0025] In the picture:

[0026] 1-Spindle system; 11-Spindle; 12-Base; 121-Base flange; 13-Bearing;

[0027] 2-Gearbox; 21-Gearbox housing; 211-Gearbox housing flange; 22-Low-speed stage transmission module;

[0028] 3-Generator; 31-Casing;

[0029] 4-Base;

[0030] 5- Flexible coupling;

[0031] 6-Wheel hub. Detailed Implementation

[0032] To make the technical problems solved by the present invention, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," etc., are used only for descriptive purposes or to distinguish different structures or components, and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions.

[0034] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0035] like Figure 1As shown, this embodiment provides a semi-direct-drive wind turbine generator set, including a main shaft system 1, a gearbox 2, a generator 3, and a base 4. The main shaft system 1 includes a main shaft 11 and a base 12, with the main shaft 11 rotatably mounted within the base 12. The gearbox 2 includes a housing 21, the front end of which is rigidly connected to the rear end of the base 12. The generator 3 includes a housing 31, the front end of which is rigidly connected to the rear end of the gearbox 2. The gearbox 2 and the generator 3 form an integrated structure. Both the base 12 and the integrated structure are rigidly mounted on the base 4.

[0036] The semi-direct drive wind turbine generator set provided in this embodiment rigidly connects the front end of the housing 21 in the gearbox 2 to the rear end of the base 12 in the main shaft system 1, and rigidly connects the rear end of the housing 21 to the front end of the casing 31 in the generator 3. Then, the base 12 and the integrated system consisting of the gearbox 2 and the generator 3 are rigidly mounted on the base 4, allowing the base 4 to directly bear the total weight of the main shaft system 1, gearbox 2, and generator 3. This avoids the weight of the generator 3 being directly added to the housing 21 of the gearbox 2, preventing gearbox 2 vibration, ensuring transmission balance, and improving the safety factor of the entire transmission chain. Furthermore, since the gearbox 2 is fixed to the base 4 via the housing 21, its deformation under load will be more uniform, further increasing the safety factor of the gearbox 2.

[0037] Preferably, the semi-direct drive wind turbine generator set provided in this embodiment further includes a flexible coupling 5, and the gearbox 2 further includes a low-speed transmission module 22. The main shaft 11 and the low-speed transmission module 22 are connected by the flexible coupling 5. By setting the flexible coupling 5, part of the impact load from the main shaft 11 can be offset, and the misalignment between the main shaft and the low-speed transmission module 22 can be compensated. This allows for greater optimization in the design and selection of the main shaft 11. In addition, the weight at the connection between the main shaft 11 and the low-speed transmission module 22 is mainly borne by the base 12. Therefore, the bearings of the low-speed transmission module 22 only bear the weight of the low-speed transmission module 22 itself, which has significant advantages in the selection of the bearings of the low-speed transmission module 22 and cost control. Specifically, in this embodiment, the flexible coupling 5 is a hydraulic flexible coupling.

[0038] Specifically, the gearbox 2 provided in this embodiment is a high-megawatt gearbox. The semi-direct-drive wind turbine generator set provided in this embodiment, through the cooperation of the main shaft system 1, gearbox 2, generator 3, base 4 and flexible coupling 5, forms an external rigid and internal flexible support method. This avoids the impact of the large additional load generated by the high-megawatt gearbox on the life of the low-speed bearing of gearbox 2 and the rigidity of gearbox 2 itself, thereby increasing the safety factor of gearbox 2 and the entire transmission chain, and reducing costs.

[0039] Preferably, in this embodiment, the housing 21 is cylindrical. Compared with the traditional torsion arm elastic support fixing method, the torsion arm does not need to be provided with support blocks when using the external rigid and internal elastic support method. Therefore, the entire housing 21 can be designed as cylindrical to save more cabin space.

[0040] Specifically, such as Figure 1 and Figure 2 As shown, the front end of the housing 21 is provided with a housing flange 211, and the rear end of the base 12 is provided with a base flange 121. The housing flange 211 and the base flange 121 are rigidly connected. Furthermore, the housing flange 211 and the base flange 121 are rigidly connected by bolts.

[0041] Preferably, the spindle system 1 provided in this embodiment further includes a bearing 13, which is disposed between the spindle 11 and the housing 12. Specifically, in this embodiment, there are two bearings 13, which are located at the front end and rear end of the spindle 11, respectively.

[0042] Preferably, the semi-direct drive wind turbine generator set provided in this embodiment further includes a hub 6 and a wind turbine system. The rear end of the hub 6 is connected to the front end of the main shaft 11, and the wind turbine system is connected to the hub 6. That is, the transmission between the wind turbine system and the main shaft 11 is realized through the hub 6.

[0043] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A semi-direct-drive wind turbine generator set, characterized in that, include: A spindle system, comprising a spindle and a base, wherein the spindle is rotatably disposed within the base; A gearbox, including a housing, wherein the front end of the housing is rigidly connected to the rear end of the base; A generator includes a housing, the front end of which is rigidly connected to the rear end of a gearbox, and the gearbox and the generator form an integrated structure. The base, the seat body and the integrated structure are both rigidly mounted on the base, which can prevent the weight of the generator from being directly attached to the gearbox housing; The gearbox further includes a low-speed transmission module, and the main shaft and the low-speed transmission module are connected by the flexible coupling. The main shaft system, the gearbox, the generator, the base, and the flexible coupling work together to form a support system that is rigid on the outside and flexible on the inside.

2. The semi-direct drive wind turbine generator set according to claim 1, characterized in that, The flexible coupling is a hydraulic flexible coupling.

3. The semi-direct drive wind turbine generator set according to any one of claims 1-2, characterized in that, The gearbox is a high-megawatt gearbox.

4. The semi-direct drive wind turbine generator set according to any one of claims 1-2, characterized in that, The box is cylindrical.

5. The semi-direct drive wind turbine generator set according to any one of claims 1-2, characterized in that, The front end of the housing is provided with a housing flange, and the rear end of the base is provided with a base flange, and the housing flange and the base flange are rigidly connected.

6. The semi-direct drive wind turbine generator set according to claim 5, characterized in that, The housing flange and the base flange are rigidly connected by bolts.

7. The semi-direct drive wind turbine generator set according to any one of claims 1-2, characterized in that, The spindle system also includes a bearing disposed between the spindle and the housing.

8. The semi-direct drive wind turbine generator set according to claim 7, characterized in that, The number of bearings is two.

9. The semi-direct drive wind turbine generator set according to any one of claims 1-2, characterized in that, It also includes a hub and a wind turbine system, wherein the rear end of the hub is connected to the front end of the main shaft, and the wind turbine system is connected to the hub.

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