Wind power gear box and wind generating set

Abstract

The utility model relates to the technical field of wind power, and provides a wind power gear box and a wind generating set. A box body of the wind power gear box is provided with a torque arm, the torque arm is integrated with an integrally-formed bearing supporting part, and the bearing supporting part comprises a bearing seat part used for supporting a bearing outer ring of a first planet carrier bearing of the wind power gear box in the radial direction; and a bearing cover part supporting the bearing outer ring of the first planet carrier bearing in the axial direction. By means of the design that the bearing supporting part and the torque arm are integrally formed and integrated into an integral component, the compact structure is achieved, the overall strength is improved, deformation and looseness are effectively avoided, stable supporting of the planet carrier bearing is achieved, and stable operation of a wind power gear box and a wind generating set is ensured. Due to the integrated design of the bearing supporting part and the torque arm, the bearing supporting part can properly reduce the size while stably supporting the planet carrier bearing, light weight is facilitated, a connecting piece can be omitted, and therefore the structure of the wind power gear box and the structure of the wind generating set are simplified.

Description

Technical Field

[0001] This utility model relates to the field of wind power technology, specifically to wind turbine gearboxes and wind turbine generator sets. Background Technology

[0002] In wind turbine generator sets, the gearbox is a key transmission component, connecting the wind turbine and the generator to achieve speed increase and torque reduction transmission. Within the gearbox, the planetary carrier plays a crucial role in torque transmission, and it requires planetary carrier bearings for support to ensure stable operation.

[0003] Currently, planetary carrier bearings are supported by bearing housings and bearing covers, which are formed as independent components. During the operation of wind turbine generators, the bearing housings and bearing covers are prone to deformation and loosening due to the forces exerted on the planetary carrier bearings, affecting their stable support.

[0004] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this utility model, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0005] In view of this, the present invention provides a wind turbine gearbox and a wind turbine generator set to solve the problem that the planetary carrier bearing cannot be stably supported.

[0006] According to one aspect of the present invention, a wind turbine gearbox is provided, wherein the gearbox housing is provided with a torque arm, the torque arm is integrated with an integrally formed bearing support portion, the bearing support portion comprising: a bearing seat portion, which radially supports the outer ring of the first planetary carrier bearing of the wind turbine gearbox; and a bearing cover portion, which axially supports the outer ring of the first planetary carrier bearing.

[0007] In some embodiments, the bearing support and the torque arm are formed as an integral cast structure.

[0008] In some embodiments, the housing has a wind turbine side and a generator side facing each other, the bearing support is disposed on the wind turbine side of the housing, and a second planetary carrier bearing is disposed on the generator side of the housing. The first planetary carrier bearing and the second planetary carrier bearing jointly support the planetary carrier of the wind turbine gearbox. The outer ring of the second planetary carrier bearing is supported by an intermediate flange, and a gasket is disposed between the intermediate flange and the outer ring of the second planetary carrier bearing.

[0009] In some embodiments, the first planetary carrier bearing and the second planetary carrier bearing are tapered roller bearings, and the gasket is pressed between the axial end face of the outer ring of the second planetary carrier bearing and the axial end face of the intermediate flange.

[0010] In some embodiments, the gasket is formed as a rigid support gasket, or the gasket is formed as an annular gasket consisting of alternating rigid support regions and elastic compensation regions.

[0011] In some embodiments, the connection area between the bearing support and the body of the torque arm is provided with reinforcing ribs, and / or the connection area is provided with a vibration damping cavity.

[0012] In some embodiments, the bearing cover has a non-uniform wall thickness, wherein the wall thickness of the region of the bearing cover corresponding to the first planetary carrier bearing is greater than the wall thickness of other regions of the bearing cover.

[0013] In some embodiments, the bearing cover and the bearing seat are connected by rounded corners, and the bearing support and the torque arm body are connected by rounded corners, with the rounded corner between the bearing support and the torque arm body being larger than the rounded corner between the bearing cover and the bearing seat.

[0014] According to another aspect of the present invention, a wind turbine generator set is provided, the wind turbine generator set being configured with a wind turbine gearbox as described in any of the above embodiments.

[0015] The beneficial effects of this utility model compared with the prior art include at least the following:

[0016] This invention features a bearing support integrally molded and integrated into the torque arm, forming a single, compact structural design with extremely high overall structural strength. This effectively counteracts the forces exerted by the first planetary carrier bearing of the wind turbine gearbox, preventing deformation and loosening. Within the bearing support, the bearing seat radially supports the outer ring of the first planetary carrier bearing, while the bearing cover axially supports it. The bearing cover and bearing seat respectively bear the axial and radial forces from the first planetary carrier bearing, providing stable support and thus enhancing the stability of the wind turbine gearbox and ensuring stable operation of the wind turbine gearbox and wind turbine generator set. Thanks to the integrated design of the bearing support and torque arm, loosening of the bearing support is prevented, and deformation is minimized. This allows the bearing support to achieve stable support for the first planetary carrier bearing while appropriately reducing its size, lowering costs, and enabling a lightweight design for the wind turbine gearbox and wind turbine generator set. Furthermore, thanks to the integrated design of the bearing housing, bearing cover, and torque arm, bolts and other connecting parts can be eliminated, thereby simplifying the structure of the wind turbine gearbox and reducing manufacturing costs.

[0017] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit the present invention. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments conforming to the present invention and, together with the description, serve to explain the principles of the present invention. It is obvious that the drawings described below are merely some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0019] Figure 1 A partial cross-sectional view of the wind turbine gearbox in an embodiment of this utility model is shown.

[0020] Figure 2 This diagram shows the structure of the second planetary carrier bearing of the wind turbine gearbox in an embodiment of the present invention. Detailed Implementation

[0021] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to make the present invention more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art.

[0022] The accompanying drawings are merely illustrative of the present invention and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar structures, and therefore, repeated descriptions of them will be omitted.

[0023] The use of terms such as "first," "second," and similar words in the specific description does not indicate any order, quantity, or importance, but is merely used to distinguish different components. Terms such as "axial," "radial," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and 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, and therefore should not be construed as a limitation of the present invention. Furthermore, in the description of the present invention, unless otherwise expressly specified and limited, the term "connection" should be interpreted broadly, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, an indirect connection through an intermediate medium, or a connection within two components.

[0024] It should be noted that, unless otherwise specified, the embodiments of this utility model and the features in different embodiments can be combined with each other.

[0025] Figure 1The diagram illustrates a partial cross-sectional view of the wind turbine gearbox in an embodiment of this utility model, with reference to... Figure 1 As shown in the embodiment of the present invention, the wind turbine gearbox has a housing 100 with a torque arm 200, and the torque arm 200 integrates an integrally formed bearing support 220, which includes:

[0026] The bearing housing 221 supports the outer ring 311 of the first planetary carrier bearing 310 of the wind turbine gearbox in the radial direction X.

[0027] The bearing cover 222 supports the outer ring 311 of the first planetary carrier bearing 310 in the axial direction Z.

[0028] The bearing support portion 220 of this invention is integrally formed and integrated into the torque arm 200, making the bearing support portion 220 and the torque arm 200 a single component. This achieves a compact structural design with extremely high overall structural strength, effectively resisting the force from the first planetary carrier bearing 310 and preventing deformation, loosening, and other problems. Specifically, the bearing support portion 220 and the outer ring 311 of the first planetary carrier bearing 310 are interference-fitted in the radial (X) and axial (Z) directions to achieve stable support. Within the bearing support portion 220, the bearing seat portion 221 supports the outer ring 311 of the first planetary carrier bearing 310 in the radial (X) direction, and the bearing cover portion 222 supports the outer ring 311 of the first planetary carrier bearing 310 in the axial (Z) direction. The bearing cover portion 222 and the bearing seat portion 221 respectively bear the axial and radial forces from the first planetary carrier bearing 310, achieving stable support for the first planetary carrier bearing 310, thereby improving the stability of the wind turbine gearbox and ensuring the stable operation of the wind turbine gearbox and wind turbine generator set. Thanks to the integrated design of the bearing support 220 and the torque arm 200, loosening of the bearing support 220 is avoided, and deformation of the bearing support 220 is minimized. This allows the bearing support 220 to provide stable support for the first planetary carrier bearing 310 while appropriately reducing its size, thereby lowering costs and enabling a lightweight design for the wind turbine gearbox and wind turbine generator set. Furthermore, the one-piece molding design of the bearing housing 221, bearing cover 222, and torque arm 200 eliminates the need for bolts and other connecting parts, simplifying the structure of the wind turbine gearbox and reducing manufacturing costs.

[0029] The torque arm 200 and the housing 100 can be integrally formed or fixedly connected by fasteners such as bolts and pins.

[0030] In some embodiments, the bearing support 220 and the torque arm 200 are formed as an integral cast structure. Casting processes can produce parts with complex shapes, such as those containing complex internal cavities; cast structures offer advantages such as high material utilization, high strength, and high hardness. The integral casting structure of the bearing support 220 and the torque arm 200 adapts to the application scenarios of wind turbine gearboxes, providing stable support for the first planetary carrier bearing 310.

[0031] In other embodiments, the bearing support 220 and torque arm 200 may be integrally formed by forging or other suitable processes.

[0032] Figure 2 The diagram illustrates the structure of the second planetary carrier bearing of the wind turbine gearbox in this embodiment of the invention. Figure 1 The magnified structure of region A, combined with Figure 1 and Figure 2 As shown, in some embodiments, the housing 100 has a wind turbine side 100a and a generator side 100b, respectively. A bearing support 220 is provided on the wind turbine side 100a of the housing 100, and a second planetary carrier bearing 320 is provided on the generator side 100b of the housing 100. The first planetary carrier bearing 310 and the second planetary carrier bearing 320 jointly support the planetary carrier 400 of the wind turbine gearbox. The outer ring 321 of the second planetary carrier bearing 320 is supported by an intermediate flange 500, and a gasket 600 is provided between the intermediate flange 500 and the outer ring 321 of the second planetary carrier bearing 320.

[0033] The wind turbine side 100a of the wind turbine gearbox is used to connect with the wind turbine housing of the wind turbine generator set, and the generator side 100b is used to connect with the generator housing of the wind turbine generator set. During the operation of the wind turbine generator set, the wind turbine side 100a bears a large load. Therefore, the bearing support part 220 of the first planetary carrier bearing 310 is designed to be integrally formed with the torque arm 200 to improve the overall rigidity and achieve stable support for the first planetary carrier bearing 310. The outer ring 321 of the second planetary carrier bearing 320 is axially and radially supported by the intermediate flange 500, which can be a rigid support structure fixed to the housing 100. The gasket 600 can be used to adjust the axial clearance and / or radial clearance, thereby adjusting the preload of the second planetary carrier bearing 320 and the first planetary carrier bearing 310, so that the second planetary carrier bearing 320 and the first planetary carrier bearing 310 jointly and stably support the planetary carrier 400. Since the bearing support 220 of the first planetary carrier bearing 310 is integrally formed with the torque arm 200, it is more convenient to adjust the axial clearance and / or radial clearance on the generator side 100b by means of the shim 600.

[0034] In some embodiments, the first planetary carrier bearing 310 and the second planetary carrier bearing 320 are tapered roller bearings. In this case, the gasket 600 can be pressed between the axial end face of the outer ring 321 of the second planetary carrier bearing 320 and the axial end face of the intermediate flange 500 to adjust the axial preload of the tapered roller bearing. This serves to eliminate the internal clearance of the tapered roller bearing and control its stiffness. By properly preloading, the load is evenly distributed, and the bearing and the planetary carrier 400 operate stably.

[0035] The gasket 600 can be formed as a rigid support gasket, for example, made of carbon steel. The thickness of the gasket 600 is set as needed to compensate for the bearing clearance / preload effects that may be caused by temperature rise. In some embodiments, to improve the performance of the gasket 600 and ensure its effectiveness under various operating conditions of the wind turbine gearbox (e.g., high-temperature conditions, vibration conditions, etc.), the gasket 600 can be designed as an annular gasket consisting of alternating rigid support areas and elastic compensation areas. The rigid support areas can be formed of a low-expansion metal (e.g., Invar alloy) to provide rigid support, while the elastic compensation areas can be formed of a highly elastic polymer (e.g., silicone rubber) to provide elastic compensation; the alternation of low-expansion metal and highly elastic polymer offsets clearance changes caused by temperature rise, vibration, and other factors during bearing operation.

[0036] Continue to refer to Figure 1 As shown, in some embodiments, the connection area 200' between the bearing support 220 and the main body of the torque arm 200 is provided with reinforcing ribs, and / or, the connection area 200' is provided with a vibration damping cavity. The structure of the reinforcing ribs and the vibration damping cavity can be configured as needed, and is not specifically shown in the figure. For example, the reinforcing ribs can be strip-shaped ribs to increase the structural strength of the connection area 200'; the vibration damping cavity can be an arc-shaped concave cavity, and damping materials such as silicone rubber can be embedded inside to absorb vibration and improve the dynamic structural stiffness of the connection area 200'. In specific implementation, the reinforcing ribs can be set in the load-bearing functional area of ​​the connection area 200', and the vibration damping cavity can be set in the non-load-bearing functional area of ​​the connection area 200' to achieve a balance between lightweight and stiffness.

[0037] In some embodiments, the bearing cover 222 has a non-uniform wall thickness, wherein the wall thickness of the region of the bearing cover 222 corresponding to the first planetary carrier bearing 310 is greater than the wall thickness of other regions of the bearing cover 222, so as to balance stable support for the first planetary carrier bearing 310 and weight reduction design.

[0038] In some embodiments, the bearing cover 222 and the bearing seat 221, as well as the bearing support 220 and the body of the torque arm 200, are connected by rounded corners, with the rounded corner α between the bearing support 220 and the body of the torque arm 200 being larger than the rounded corner β between the bearing cover 222 and the bearing seat 221. This rounded corner connection avoids stress concentration and optimizes the force transmission path. The larger rounded corner α between the bearing support 220 and the body of the torque arm 200 significantly reduces the stress concentration factor, preventing risks such as breakage between the bearing support 220 and the body of the torque arm 200. The smaller rounded corner β between the bearing cover 222 and the bearing seat 221 accommodates the bearing assembly space, ensuring axial and radial support for the first planetary carrier bearing 310.

[0039] This utility model embodiment also provides a wind turbine generator set, which is equipped with a wind turbine gearbox as described in any of the above embodiments. Utilizing the integrated design of the bearing support 220 and torque arm 200, which are integrally formed into a single component, a compact structure is achieved, improving overall strength and rigidity, effectively preventing deformation and loosening, and providing stable support for the planetary carrier bearing. This, in turn, enhances the stability of the wind turbine gearbox and ensures the stable operation of the wind turbine gearbox and wind turbine generator set. Thanks to the integrated design of the bearing support 220 and torque arm 200, the bearing support 220 can be appropriately reduced in size while providing stable support for the planetary carrier bearing, thereby reducing costs and achieving a lightweight design for the wind turbine gearbox and wind turbine generator set. Furthermore, the integrally formed design eliminates the need for bolts and other connecting parts, simplifying the structure of the wind turbine gearbox and wind turbine generator set and reducing manufacturing costs.

[0040] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. A wind turbine gearbox, the gearbox casing of which is provided with a torque arm, characterised in that, The torque arm is integrated with a bearing support part, which comprises: a bearing seat part supporting a bearing outer ring of a first planetary carrier bearing of the wind power gearbox in a radial direction; a bearing cover part supporting the bearing outer ring of the first planetary carrier bearing in an axial direction.

2. A wind turbine gearbox according to claim 1, characterised in that The bearing support part and the torque arm are formed as an integral cast structure.

3. The wind turbine gearbox of claim 1, wherein, The gearbox has opposite fan sides and generator sides, the bearing support part is arranged at the fan side of the gearbox, and the generator side of the gearbox is provided with a second planetary carrier bearing, the first planetary carrier bearing and the second planetary carrier bearing jointly supporting a planetary carrier of the wind power gearbox. The bearing outer ring of the second planetary carrier bearing is supported by an intermediate flange, and a gasket is arranged between the bearing outer ring of the second planetary carrier bearing and the intermediate flange.

4. A wind turbine gearbox according to claim 3, wherein The first planetary carrier bearing and the second planetary carrier bearing are conical roller bearings, and the gasket is pressed between an axial end surface of the bearing outer ring of the second planetary carrier bearing and an axial end surface of the intermediate flange.

5. A wind turbine gearbox as claimed in claim 3, characterised in that, The gasket is formed as a rigid support gasket, or the gasket is formed as an annular gasket with rigid support zones and elastic compensation zones alternately distributed.

6. The wind turbine gearbox of claim 1, wherein, The connecting area of the bearing support part and the body of the torque arm is provided with a reinforcing rib, and / or the connecting area is provided with a damping cavity.

7. A wind turbine gearbox according to claim 1, wherein The bearing cover part has a non-uniform wall thickness, wherein the wall thickness of the area of the bearing cover part corresponding to the first planetary carrier bearing is greater than the wall thickness of other areas of the bearing cover part.

8. The wind turbine gearbox of claim 1, wherein, The bearing cover part and the bearing seat part are connected by a round corner transition, and the transition round corner between the bearing support part and the body of the torque arm is greater than the transition round corner between the bearing cover part and the bearing seat part.

9. A wind power unit, characterized in that The wind turbine generator is configured with the wind power gearbox according to any one of claims 1-8.

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