Rolling/sliding contact fatigue test device

Abstract

The invention relates to a rolling / sliding contact fatigue test device and belongs to the technical field of composition and structures of mechanical products. The device comprises a base, a frequency modulation motor, a roller shaft, a test piece, a driven shaft, an air source device of a cylinder and a pneumatic system, a control element and an auxiliary element, wherein the roller shaft is driven by the motor to rotate; the test piece is arranged at one end of the driven shaft and contacts the roller; the other end of the driven shaft is connected with the cylinder; the test piece can be replaced into a flat-face piece or a roller assembly according to needs; when the flat-face test piece is selected, radiuses or rotating speeds of different roller test pieces are adopted, and rolling / sliding contact in different slip frequencies can be formed; and moreover, the rotating speed of the roller can be controlled by regulating the rotating speed of the motor, different contact pressures can be generated by regulating the pressure of the cylinder, and finally, the testing device can be used for rolling / sliding contact fatigue test of materials of different slip frequencies, different rotating speeds and different loads.

Description

technical field [0001] The invention relates to a material contact fatigue test device of a roller element, which belongs to the technical field of composition and structure of mechanical products. Background technique [0002] Contact fatigue widely exists on the surfaces of two components that are in repeated contact with each other, such as gears, bearings, cams, and rails. After a certain number of cycles of cyclic contact stress, these parts will peel off small pieces on the local area of ​​the working surface, forming pits or pits, which will cause noise, wear, vibration and temperature rise during work, resulting in failure , so the contact fatigue performance is an important technical index of materials for these key parts. Due to the complexity of the contact fatigue failure mechanism and the limitations of theoretical research, the contact fatigue test is undoubtedly an effective way to evaluate this index. Since the contact characteristics of components such as ...

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Problems solved by technology

Commonly used testing machines in China also include 4-ball testing machine, 5-ball testing machine, ball and V-ring testing machine, thrust plate testing machine, etc. These testing machines are designed to simulate the working principle of bearing contact fatigue, so the equipment The overall structure is complex, and the rolling and sliding state of the bearing during the test cannot be controlled

[0004] Fatigue properties of materials are the basis of product fatigue design. Carrying out corresponding material fatigue tests according to the contact conditions of parts can grasp the fatigue performance of products. There are no reports available for rolling / sliding contact fatigue tests of materials. device

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