Torque shaft bearing attached with DLC (Diamond Like Carbon) coating

Abstract

The utility model relates to the technical field of gas turbine equipment, and discloses a torque shaft bearing attached with a DLC (diamond-like carbon) coating, which comprises a rolling body and a bearing mounting seat, a shaft hole is arranged on the rolling body in a penetrating manner, the side wall of the rolling body is provided with the DLC coating, and the rolling body is arranged in the bearing mounting seat. The torque shaft bearing is convenient to install and assemble and can stably operate for a long time, and the using effect of the torque shaft bearing is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of gas turbine equipment, in particular to a torque shaft bearing with a DLC coating. Background Art

[0002] The front and rear spherical plain bearings of the gas generator's torque shaft rotate and oscillate during operation. Without grease or oil, these bearings exhibit dry friction. Due to the torque shaft's long-term operation, the bearings and actuating rings are susceptible to wear. Increased friction can cause abnormal changes in intake airflow, leading to surge.

[0003] Currently, torque shaft bearings in gas turbines are often made of high-strength, high-wear-resistant materials, and the surface of the parts is treated with corrosion-resistant treatment. However, wear still occurs during operation. Analysis of the causes reveals that the torque shaft bearings are subjected to complex operating conditions of high friction and small relative vibrations for a long time. The direct contact between the sliding surfaces and insufficient lubrication lead to the accumulation of impurities on the bearing mating surfaces. With increasing service life, the wear of the torque shaft bearings becomes increasingly severe, ultimately requiring maintenance and replacement, which not only increases maintenance costs but also increases the labor intensity of the personnel. Therefore, a torque shaft bearing is needed to solve this problem. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model develops a torque shaft bearing with a DLC coating. The utility model is convenient for installation and assembly and can operate stably for a long time, thereby effectively improving the use effect of the torque shaft bearing.

[0005] The technical solution of the utility model to solve the technical problem is: a torque shaft bearing with a DLC coating, including a rolling body and a bearing mounting seat, an axial hole is penetrated by the rolling body, a DLC coating is provided on the side wall of the rolling body, and the rolling body is arranged in the bearing mounting seat.

[0006] As an optimization, the rolling element is drum-shaped, with the diameter at both ends being smaller than the diameter in the middle. This drum-shaped rolling element is more convenient during design and assembly, and the flat surfaces at both ends help workers press the rolling element onto the torque shaft.

[0007] As an optimization, a mounting plate is provided at one end of the bearing mounting seat, which can be connected to the base.

[0008] As an optimization, the mounting plate is provided with a plurality of bolt holes. By providing the bolt holes, it can be connected to the base by mounting bolts.

[0009] As an optimization, the mounting plate is provided with a plurality of threaded holes, which allow bolts to be screwed in during disassembly to eject the bearing mounting seat.

[0010] As an optimization, the bearing mount is a split type, comprising a first and second identical body, both of which have spherical surfaces on their inner sides that mate with the rolling element. The first and second bodies facilitate assembly and mating with the rolling element.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] By providing rolling elements and bearing mounts, a torque shaft bearing can be easily assembled. The bearing mounts prevent the rolling elements from dislodging and allow the rolling elements to deflect at a certain angle. The shaft holes provide for mounting the torque shaft. The DLC coating enhances the surface hardness of the rolling elements without further grinding, reduces the coefficient of friction on the rolling element surface, and provides them with improved wear and scratch resistance without compromising the fatigue performance of the base metal. This utility model facilitates installation and assembly while ensuring long-term stable operation, effectively improving the performance of the torque shaft bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a cross-sectional view of an embodiment of the present invention.

[0014] Figure 2 This is a structural schematic diagram of a bearing mounting seat in an embodiment of the present invention.

[0015] In the figure: 1. Rolling element; 2. Bearing mounting seat; 3. Shaft hole; 4. DLC coating; 5. Mounting plate; 6. Bolt hole; 7. Threaded hole; 8. Base; 9. Torque shaft;

[0016] 21. First seat; 22. Second seat. DETAILED DESCRIPTION

[0017] In order to clearly illustrate the technical features of this solution, the present invention is described in detail below through specific implementation methods and in conjunction with the accompanying drawings.

[0018] Example 1

[0019] Figure 1 and Figure 2 An embodiment of the present invention is as follows: Figure 1 and Figure 2 As shown, a torque shaft bearing with a DLC coating includes a rolling element 1 and a bearing mounting seat 2. An axial hole 3 is provided through the rolling element 1, and a DLC coating 4 is provided on the side wall of the rolling element 1. The DLC coating 4 is in the form of a thin film, and the thickness of the DLC coating 4 is 2um to 6um. The DLC coating 4 is attached to the surface of the rolling element 1 by a vapor deposition method, and the rolling element 1 is arranged in the bearing mounting seat 2.

[0020] By arranging the rolling element 1 and the bearing mounting seat 2, a torque shaft bearing can be formed. The bearing mounting seat 2 can prevent the rolling element 1 from falling out and can allow the rolling element 1 to deflect at a certain angle; by arranging the shaft hole 3, the torque shaft 9 can be installed; by arranging the DLC coating 4, the surface hardness of the rolling element 1 can be enhanced without further grinding processing, and the friction coefficient of the surface of the rolling element 1 can be reduced, providing the rolling element 1 with better wear resistance and scratch resistance, while not reducing the fatigue performance of the base metal.

[0021] like Figure 1 As shown, the rolling element 1 is drum-shaped, with arc-shaped sidewalls. The diameters at both ends of the rolling element 1 are smaller than the diameter in the middle, and the diameter of the shaft hole 3 is smaller than the diameters at both ends of the rolling element 1. The drum-shaped rolling element 1 is more convenient during design and assembly, and the flat surfaces at both ends help workers press the rolling element 1 onto the torque shaft 9.

[0022] like Figure 1 and Figure 2 As shown, one end of the bearing mounting seat 2 is provided with a mounting plate 5. By providing the mounting plate 5, it can be connected to the base 8.

[0023] like Figure 2 As shown, the mounting plate 5 is provided with a plurality of groups of bolt holes 6. By providing the bolt holes 6, it can be connected to the base 8 by mounting bolts.

[0024] like Figure 2 As shown, the mounting plate 5 is provided with a plurality of threaded holes 7. By providing the threaded holes 7, bolts can be screwed in during the disassembly process, and the bolts abut against the base 8 to eject the bearing mounting seat 2.

[0025] like Figure 1 and Figure 2 As shown, the bearing mount 2 is a split bearing mount, comprising a first seat 21 and a second seat 22 that are identical. The inner sides of the first seat 21 and the second seat 22 are both provided with spherical surfaces that mate with the rolling element 1. The provision of the first seat 21 and the second seat 22 facilitates assembly with the rolling element 1 without damaging the DLC coating 4 during assembly.

[0026] During use, the DLC coating 4 is attached to the surface of the rolling element 1 by vapor deposition. Then, pressure is applied to the end face of one end of the rolling element 1, and the rolling element 1 is pressed onto the torque shaft 9. The first seat body 21 and the second seat body 22 are then respectively installed on both sides of the rolling element 1. Finally, the bearing mounting seat 2 is installed on the base 8. The mounting bolts are passed through the bolt holes 6 and the corresponding bolt holes of the base 8 and connected with the nuts to complete the installation. During disassembly, the mounting bolts and nuts are removed, and the bolts are screwed into the threaded holes 7. The bolts abut against the base 8, thereby smoothly ejecting the bearing mounting seat 2. This utility model is not only convenient for installation and assembly, but also can operate stably for a long time, effectively improving the use effect of the torque shaft bearing.

[0027] The descriptions of the orientation or relative position relationship of the structure in the present invention, such as the orientation or relative position relationship indicated by "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., are based on the orientation or position 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 structure referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

Claims

1. A torque shaft bearing with a DLC coating, comprising a rolling element (1), characterized in that: It also includes a bearing mounting seat (2), an axial hole (3) is provided through the rolling body (1), a DLC coating (4) is provided on the side wall of the rolling body (1), and the rolling body (1) is arranged in the bearing mounting seat (2).

2. The torque shaft bearing with a DLC coating according to claim 1, characterized in that: The rolling body (1) is in a drum shape, and the diameters at both ends of the rolling body (1) are smaller than the diameter at the middle.

3. The torque shaft bearing with a DLC coating according to claim 2, characterized in that: One end of the bearing mounting seat (2) is provided with a mounting plate (5).

4. The torque shaft bearing with a DLC coating according to claim 3, characterized in that: A plurality of groups of bolt holes (6) are provided on the mounting plate (5).

5. The torque shaft bearing with a DLC coating according to claim 4, characterized in that: A plurality of groups of threaded holes (7) are provided on the mounting plate (5).

6. The torque shaft bearing with a DLC coating according to any one of claims 1 to 5, characterized in that: The bearing mounting seat (2) comprises a first seat body (21) and a second seat body (22) which are completely identical. The inner sides of the first seat body (21) and the second seat body (22) are both provided with a spherical surface which matches the rolling body (1).

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