Bearing pre-tightening tool for wind power gear box

Abstract

A bearing pre-tightening tool for a wind power gear box comprises a hydraulic cylinder body which is in a circular ring shape as a whole, a circular through hole is formed in the middle of the hydraulic cylinder body, a plurality of bolt holes are distributed in a circle close to the edge of the hydraulic cylinder body, and an annular recess is formed in one side between the bolt holes and the inner edge of the hydraulic cylinder body; the oil pipe connecting device is arranged on one side, away from the annular recess, of the hydraulic cylinder body; and the floating step is integrally in a circular ring shape, is arranged above the annular recess of the hydraulic cylinder body, and is matched with the hydraulic cylinder body to form an annular accommodating space. According to the bearing pre-tightening tool for the wind power gear box, the problems that in the pre-tightening process of existing equipment, the number of times of adjusting assembly parts is large, the steps of installing tools are complex, and bearing pre-tightening is not in place are solved, the time for personnel to adjust the tools can be effectively shortened, certain labor intensity is lowered, the bearing pre-tightening efficiency is improved, and the working efficiency is improved. And the pre-tightening quality of the bearing is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of wind power, in particular to a bearing pre-tightening tool for a wind power gear box. Background Art

[0002] Preload means that after the bearing is installed, a certain amount of pre-deformation is generated between the rolling elements and the raceways so that all the rolling elements are in a uniformly compressed state. Bearing preload has the advantages of improving rotation accuracy, increasing rigidity, and increasing the life of the bearing.

[0003] In the tapered roller bearing structure at a specific position in a wind turbine gearbox, the traditional preloading method usually adopts a fully mechanical press-fitting method, making a step-type pressure plate fixture. By applying a certain amount of pressure, the tapered bearing preloading effect of "face-to-face" installation is achieved (that is, the bearing working clearance is adjusted to the appropriate size). However, under the traditional method, adjusting the fixture is time-consuming and labor-intensive, and the preloading quality cannot be guaranteed. A dynamic preloading method is now proposed to reduce the workload of personnel. As shown in the following figure: a schematic diagram of the traditional preloading method process and a schematic diagram of the dynamic preloading method process, under the traditional method, the assembly parts need to be adjusted many times, and the tools and steps required for installation are complicated, which is inconvenient for personnel to operate. At the same time, because the pressure plate step is fixed, the baffle must be loosened during the bearing preloading process, otherwise the bearing will be damaged. Utility Model Content

[0004] The main purpose of the utility model is to provide a bearing pre-tightening tool for a wind power gearbox, which overcomes the above technical problems.

[0005] In order to achieve the above purpose, the present invention proposes the following technical solutions:

[0006] A bearing pre-tightening tool for a wind power gearbox, comprising:

[0007] The hydraulic cylinder body is annular in shape as a whole, with a circular through hole in the middle, multiple bolt holes distributed around the edge, and an annular recess on one side between the bolt hole and the inner edge of the hydraulic cylinder body;

[0008] An oil pipe connecting device is provided on a side of the hydraulic cylinder body away from the annular recess;

[0009] The floating step is annular in shape as a whole and is arranged above the annular recess of the hydraulic cylinder body, and cooperates with the hydraulic cylinder body to form an annular accommodating space.

[0010] Furthermore, the floating step includes a piston portion and a supporting portion, the piston portion extends into the annular recess, and the supporting portion is connected to the upper portion of the piston portion.

[0011] Furthermore, the oil pipe connecting device and the hydraulic cylinder body are connected in a fixed manner.

[0012] Furthermore, the oil pipe connecting device and the hydraulic cylinder body are connected in a detachable manner.

[0013] Furthermore, the floating step can move up and down relative to the hydraulic cylinder body, and always forms an annular accommodation space with the hydraulic cylinder body during the movement.

[0014] Furthermore, one end of the oil pipe connecting device is connected to the hydraulic cylinder body, and the other end is connected to the hydraulic oil circuit.

[0015] Furthermore, an oil hole is provided at the connection between the hydraulic cylinder body and the oil pipe connecting device, communicating the annular accommodating space with the oil pipe connecting device.

[0016] Furthermore, the bolt hole is connected with a fixing bolt.

[0017] The utility model provides a bearing pre-tightening tool for a wind power gearbox, which solves the problems of frequent assembly component adjustments, complicated installation steps, and insufficient bearing pre-tightening in the existing equipment pre-tightening process. It can effectively reduce the time for personnel to adjust tools, reduce a certain amount of labor intensity, improve the bearing pre-tightening efficiency, and ensure the bearing pre-tightening quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting part of this application are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0019] Figure 1 This is a side structural schematic diagram of a bearing pre-tightening tooling for a wind power gearbox according to the present invention.

[0020] Figure 2 This is a schematic diagram of the bottom structure of a bearing pre-tightening tool for a wind power gearbox according to the present invention.

[0021] Figure 3 This is a schematic diagram of the installation of the preload fixture and preload platform.

[0022] Figure 4 Schematic diagram of the working status of the preload fixture.

[0023] The above drawings include the following reference numerals:

[0024] 1. Hydraulic cylinder body; 2. Oil pipe connection device; 3. Floating step; 4. Bearing outer ring; 5. Drive housing component; 11. Bolt hole; 12. Fixing bolt; 31. Piston part; 32. Support part. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0027] Unless otherwise specifically stated, the relative arrangement of the parts and steps, the numerical expressions and the numerical values ​​set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values ​​should be interpreted as being merely exemplary and not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0028] Reference below Figures 1 to 4 , the utility model is further described:

[0029] A bearing pre-tightening tool for a wind power gearbox, comprising:

[0030] The hydraulic cylinder body 1 is annular in shape as a whole, with a circular through hole in the middle and a plurality of bolt holes 11 distributed around the edge. An annular recess is provided on one side between the bolt holes 11 and the inner edge of the hydraulic cylinder body 1.

[0031] The oil pipe connecting device 2 is arranged on a side of the hydraulic cylinder body 1 away from the annular recess;

[0032] The floating step 3 is annular in shape as a whole and is arranged above the annular recess of the hydraulic cylinder body 1 , and cooperates with the hydraulic cylinder body 1 to form an annular accommodating space.

[0033] In this embodiment, the floating step 3 includes a piston portion 31 and a support portion 32 . The piston portion 31 extends into the annular recess, and the support portion 32 is connected to the upper portion of the piston portion 31 .

[0034] In this embodiment, one end of the oil pipe connecting device 2 is connected to the hydraulic cylinder body 1, and the other end is connected to the hydraulic oil circuit.

[0035] In this embodiment, the floating step 3 can move up and down relative to the hydraulic cylinder body 1 , and always forms an annular accommodation space with the hydraulic cylinder body 1 during the movement.

[0036] In this embodiment, an oil hole is provided at the connection between the hydraulic cylinder body 1 and the oil pipe connecting device 2 , communicating the annular accommodating space with the oil pipe connecting device 2 .

[0037] When pre-tightening the bearing, the oil in the hydraulic oil pipeline is pressed into the accommodating space of the hydraulic cylinder 1 by applying pressure, so that the floating step 3 floats up. The supporting part of the floating step 3 then drives the bearing outer ring 4 to move, adjusting the tightness between the bearing outer ring 4 and the drive housing component 5, thereby achieving bearing pre-tightening.

[0038] In this embodiment, the oil pipe connecting device 2 and the hydraulic cylinder body 1 are connected in a fixed manner.

[0039] In this embodiment, the oil pipe connecting device 2 and the hydraulic cylinder body 1 are connected in a detachable manner.

[0040] The fixed connection can ensure that the oil pipe connecting device 2 and the hydraulic cylinder body 1 are firmly connected and will not loosen during the pre-tightening process, thereby avoiding affecting the pre-tightening effect. At the same time, a good seal is ensured between the oil pipe connecting device 2 and the hydraulic cylinder body 1 to avoid leakage of hydraulic oil.

[0041] The advantage of the detachable link is that when the oil pipe connecting device 2 is damaged, it is convenient for the staff to disassemble it for repair or replacement.

[0042] In this embodiment, the bolt hole 11 is connected with a fixing bolt 12. Before the pre-tightening operation, the disassembly tool is fixed to the disassembly platform by the fixing bolt 12, and then the pre-tightening operation is performed according to the process.

[0043] In the description of the present invention, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0044] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0045] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A bearing preload fixture for a wind turbine gearbox, characterized in that: include: The hydraulic cylinder body (1) is annular in shape as a whole, with a circular through hole provided in the middle portion, a plurality of bolt holes (11) distributed around the edge, and an annular recess provided on one side between the bolt hole (11) and the inner edge of the hydraulic cylinder body (1); An oil pipe connecting device (2) is arranged on a side of the hydraulic cylinder body (1) away from the annular recess; The floating step (3) is annular in shape as a whole and is arranged above the annular recess of the hydraulic cylinder body (1), and cooperates with the hydraulic cylinder body (1) to form an annular accommodation space.

2. A bearing pre-tightening fixture for a wind turbine gearbox according to claim 1, characterized in that: The floating step (3) comprises a piston portion (31) and a support portion (32), wherein the piston portion (31) extends into the annular recess, and the support portion (32) is connected to the upper portion of the piston portion (31).

3. The bearing pre-tightening fixture for a wind turbine gearbox according to claim 1, characterized in that: The oil pipe connecting device (2) and the hydraulic cylinder body (1) are connected in a fixed manner.

4. The bearing pre-tightening fixture for a wind turbine gearbox according to claim 3, characterized in that: The oil pipe connecting device (2) and the hydraulic cylinder body (1) are connected in a detachable manner.

5. The bearing pre-tightening fixture for a wind turbine gearbox according to claim 1, characterized in that: The floating step (3) can move up and down relative to the hydraulic cylinder body (1), and always forms an annular accommodation space with the hydraulic cylinder body (1) during the movement.

6. The bearing pre-tightening fixture for a wind turbine gearbox according to claim 1, characterized in that: One end of the oil pipe connecting device (2) is connected to the hydraulic cylinder body (1), and the other end is connected to the hydraulic oil circuit.

7. The bearing pre-tightening fixture for a wind turbine gearbox according to claim 1, characterized in that: An oil hole is provided at the connection between the hydraulic cylinder body (1) and the oil pipe connecting device (2), communicating the annular accommodating space with the oil pipe connecting device (2).

8. The bearing pre-tightening fixture for a wind turbine gearbox according to claim 1, characterized in that: The bolt hole (11) is connected with a fixing bolt (12).

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