Tool for machining shaft sleeve of wind power gear box on horizontal lathe

Abstract

The utility model provides a tool for machining a shaft sleeve of a wind power gear box on a horizontal lathe. The tool is characterized in that more than three threaded holes are uniformly distributed on the circumference of a tool sleeve; the shaft sleeve is sleeved outside the tool sleeve; the tool bolt is arranged in a threaded mode and penetrates through a threaded hole in the circumference of the tool sleeve, the bolt head of the tool bolt is located outside the tool sleeve, and the bolt tail of the tool bolt is located inside the tool sleeve. The bolt head of the tool bolt makes contact with an inner hole of the shaft sleeve. And the tool sleeve is clamped and fixed by the machine tool clamping jaw. During machining, the shaft sleeve is stressed more uniformly, the dimensional accuracy of the outer circle of the shaft sleeve is higher, no taper exists, and the tool is high in universality.

Description

Technical Field

[0001] This utility model relates to the field of wind turbine gearbox maintenance tooling, specifically a tooling for machining wind turbine gearbox bushings on a horizontal lathe. Background Technology

[0002] Due to its advantages such as being pollution-free and having low construction costs, wind power generation has experienced rapid development in recent years.

[0003] The bushing in a wind turbine gearbox is a crucial mechanical component. As the most critical part of wind power equipment, the maintenance quality of the gearbox is extremely important. After a wind turbine gearbox is taken off the rack for maintenance, the gearbox needs to be disassembled and the bearing holes inspected. Due to the long operating time, the bearing holes may show wear. Simply scrapping the gearbox would increase maintenance costs. Therefore, for worn bearing holes, we typically enlarge the original bearing holes, install a bushing, and then machine the inner hole of the bushing to the original required dimensions. This ensures the correct inner diameter of the bearing hole in the gearbox. The outer diameter of the bushing is very important. The accuracy of the bushing's dimensions directly affects its installation and use. Usually, when the bushing is machined on a horizontal lathe, it is directly supported by the machine tool's chuck. Since the bushing has a certain width, the chuck can only support one side of the bushing. The inner hole of the bushing cannot be evenly stressed. After the bushing is machined, the side supported by the machine tool's chuck and the side not supported by the chuck have a large difference in size.

[0004] The technical solution of existing technology 1 is as follows:

[0005] The bushing is placed directly onto a horizontal lathe and its outer diameter is precision machined.

[0006] The disadvantages of existing technology 1 are:

[0007] For bushings with a relatively large width, directly supporting them with the chucks of a horizontal machine tool can only hold one side of the bushing. Since the bushing is a thin-walled part, if the machine tool's chucks only hold one side, it is easy to cause uneven stress on the bushing. After the bushing is machined and the chucks are released, the stress is released, which will cause the outer circle of the bushing to have a certain taper, thus affecting the outer circle dimension of the bushing. Utility Model Content

[0008] This utility model provides a tooling for machining wind turbine gearbox bushings on a horizontal lathe. Its purpose is to overcome the shortcomings of the prior art, so that the bushing is subjected to more uniform force during machining, the outer diameter of the bushing is more accurate and has no taper, and the tooling has strong versatility.

[0009] The technical solution adopted by this utility model to solve its technical problem is:

[0010] The tooling for machining wind turbine gearbox bushings on a horizontal lathe is characterized by:

[0011] The tooling sleeve has three or more threaded holes evenly distributed around its circumference; the bushing is fitted outside the tooling sleeve; the tooling bolt is screwed and passes through the threaded holes on the circumference of the tooling sleeve, with the bolt head outside the tooling sleeve and the bolt tail inside the tooling sleeve; the bolt head of the tooling bolt contacts the inner hole of the bushing; the machine tool jaws clamp and fix the tooling sleeve.

[0012] The tooling sleeve has four threaded holes evenly distributed around its circumference.

[0013] The head of the tooling bolt is round.

[0014] The tooling bolts contact the middle area of ​​the bushing.

[0015] The tooling sleeve is held in place by the machine tool's ejector pin on the opposite side of the machine tool's chuck.

[0016] The advantages of this utility model are:

[0017] 1) Using this tooling can effectively solve the problem of tapered outer diameter of bushings caused by directly placing them on a horizontal lathe for machining.

[0018] 2) This fixture uses four evenly distributed fixture bolts installed at the shaft diameter to contact the inner hole of the bushing. The extension length of the bolts is controlled by tightening the bolts, making it suitable for bushings with different inner diameters. This makes the fixture more versatile.

[0019] 3) The tooling structure is simple and easy to process and manufacture;

[0020] 4) The fixing method is simple and does not require other workpiece clamping fixtures. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Figure 1 This is a simplified diagram showing the installation position of auxiliary tooling used when machining the outer diameter of the bushing;

[0023] Figure 2 for Figure 1 A-direction view. Detailed Implementation

[0024] To more clearly illustrate the technical solution of this utility model, the accompanying drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other embodiments can be obtained based on these drawings without creative effort. To facilitate understanding of this utility model, a more detailed description of this utility model will be provided below in conjunction with the accompanying drawings and specific embodiments.

[0025] It should be noted that when an element is described as being "fixed to" another element, it can be directly on the other element, or one or more intermediate elements may exist between them. When an element is described as being "connected to" another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them. The terms "upper," "lower," "inner," "outer," "bottom," etc., used in this specification indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and 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, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] like Figure 1 , Figure 2 As shown:

[0027] This utility model is a tooling for machining wind turbine gearbox bushings on a horizontal lathe.

[0028] The bushings 1 used in wind turbine gearboxes are all thin-walled parts. In the existing technology, one end of the bushing 4 is fixed directly by the lathe jaws 7, and the other side of the bushing 1 is not subjected to force, making the bushing 1 very easy to deform.

[0029] The tooling sleeve 2 is a tubular steel component with a certain wall thickness. Four threaded holes 21 are evenly machined in the circumference of the tooling sleeve 2. The tooling round head bolt 3 is screwed in with a wrench and passed through the pre-machined threaded holes 21 in the circumference of the tooling sleeve 2. The bolt head 31 of the tooling round head bolt 3 is located outside the tooling sleeve 2, and the bolt tail 32 of the tooling round head bolt 3 is located inside the tooling sleeve 2.

[0030] This utility model uses a total of four tooling round head bolts 3.

[0031] The bushing 1 is fitted over the tooling sleeve 2. Based on the inner diameter of the bushing 1, the extension length of the tooling round head bolt 3 beyond the tooling sleeve 2 is adjusted to control the contact between the bolt head 31 of the tooling round head bolt 3 and the inner diameter of the bushing 1. The bolt head 31 of the tooling round head bolt 3 used here is round. Since the inner diameter 11 of the bushing 1 is arc-shaped, this ensures better contact between the bolt head 31 of the tooling round head bolt 3 and the inner diameter 11 of the bushing 1. Furthermore, controlling the contact between the tooling round head bolt 3 and the middle area of ​​the bushing 1 ensures more even force distribution on both sides of the bushing 1. Four evenly distributed tooling round head bolts 3 form four-point contact, resulting in more even force distribution. In addition, when turning the tooling round head bolt 3, the force must be controlled; the contact between the tooling round head bolt 3 and the inner diameter of the bushing 1 should not be too tight, as excessive force can also cause deformation of the bushing 1.

[0032] The tooling sleeve 2 is much wider than the bushing 1. Through this tooling, the machine tool chuck 7 directly clamps and fixes the tooling sleeve 2, thus avoiding the risk of deformation caused by directly clamping the workpiece bushing 1. In addition, since the tooling sleeve 2 is relatively long, the other side of the tooling sleeve 2 can be supported by the machine tool's ejector pin.

[0033] Use a lathe tool 8 to precision machine the outer diameter of the bushing 1.

[0034] The existing wind turbine gearbox bushings are directly machined on a horizontal lathe. Based on the bushing's inner bore, the chucks on the horizontal lathe are adjusted. To prevent the bushing from moving during machining, the chucks apply considerable force to fix the bushing, which can easily lead to excessive stress on one side of the bushing. As a result, after machining, the outer diameter of the bushing develops a certain taper due to the release of stress, thus affecting the bushing's performance.

[0035] This fixture uses a single, integral sleeve-type tooling. The sleeve can be directly installed into the inner hole of the bushing for fixation. Four bolts are evenly distributed around the circumference of the sleeve. By adjusting the extension length of the bolts, the contact between the bolts and the inner hole of the bushing can be controlled to achieve the most suitable position, forming a four-point contact fixation for more stable clamping. Furthermore, the bolt extension length is adjustable, making this fixture applicable to the machining of bushings with different inner diameters, thus enhancing its versatility.

[0036] The various embodiments described in this specification are presented in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. The above description of the disclosed embodiments enables those skilled in the art to implement or use this invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this invention. Therefore, this invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A tooling for machining wind turbine gearbox bushings on a horizontal lathe, characterized in that: The tooling sleeve has three or more threaded holes evenly distributed around its circumference; the bushing is fitted outside the tooling sleeve; the tooling bolt is screwed in and passes through the threaded holes on the circumference of the tooling sleeve, with the bolt head outside the tooling sleeve and the bolt tail inside the tooling sleeve; the bolt head of the tooling bolt contacts the inner hole of the bushing; the machine tool jaws clamp and fix the tooling sleeve.

2. The tooling for machining the wind turbine gearbox bushing on a horizontal lathe as described in claim 1, characterized in that: The tooling sleeve has four threaded holes evenly distributed around its circumference.

3. The tooling for machining the wind turbine gearbox bushing on a horizontal lathe as described in claim 1, characterized in that: The head of the tooling bolt is round.

4. The tooling for machining the wind turbine gearbox bushing on a horizontal lathe as described in claim 1, characterized in that: The tooling bolts contact the middle area of ​​the bushing.

5. The tooling for machining the wind turbine gearbox bushing on a horizontal lathe as described in claim 1, characterized in that: The tooling sleeve is held in place by the machine tool's ejector pin on the opposite side of the machine tool's chuck.

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