Fretting wear test device and wear calculation method for rolling bearing

Abstract

According to the fretting wear test device and the wear calculation method for a rolling bearing, the real rolling bearing serves as a test object, a piezoelectric ceramic actuator serves as a power source, high-frequency telescopic fretting of the actuator is achieved through the lever principle, the high-frequency telescopic fretting is transmitted to a torsion shaft through a power connecting piece, torsion fretting of an inner raceway of the bearing is promoted, a tangential, rolling and twisting compound fretting mode between the bearing circumferential rolling body and the bearing innerand outer raceways is further obtained, a measuring point is set at a proper position of the torsion shaft, the fretting wear is solved by using a measuring instrument and substituted into an Archardmodel to obtain a wear coefficient, and finally, a fretting wear estimation model suitable for the in-service working condition and structural characteristics of the rolling bearing can be obtained. Compared with the prior art, the method has the advantages that the complex in-service working condition of fretting wear of the rolling bearing is reproduced, the method has the characteristics of large output, high frequency and high precision, and meanwhile, the method can be used for multi-aspect and batched fretting wear tests and can also be used for measuring the fretting wear coefficient ofthe bearing.

Description

technical field [0001] The invention relates to the technical field of mechanical wear, in particular to a fretting wear test device and a wear calculation method for rolling bearings. Background technique [0002] Fretting is an extremely small movement between two contacting surfaces, usually on the order of microns. These contact surfaces are usually static on a macroscopic scale, but imperceptible small reciprocating motions occur at the actual contact. According to the direction of relative motion between contact bodies, fretting wear is divided into four basic operation modes, namely: tangential type, radial type, rolling type and twisting type. Among them, tangential fretting is also called translational fretting, which is the most common fretting mode and the most commonly used form in fretting experiments. The repeated action of fretting wear on small parts will cause friction and wear on the contact surface, and then initiate fatigue cracks, reduce local fatigue ...

AI Technical Summary

Problems solved by technology

However, for the bearings in the clutch structural components, this scheme is quite different from the real working conditions of rolling bearings, and it is difficult to realize its high-frequency compound micro-motion form

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