Ultrasonic high-frequency ball wear fatigue test device

Abstract

The invention discloses an ultrasonic high-frequency ball wear fatigue test device. By the use of an ultrasonic loading mode, the ultra-long cycle fatigue lives of different ball test samples can be tested under the action of a wear load, and the ultra-long cycle fatigue performance of a vibration test piece can be tested under the action of a high-frequency vibrating and rolling wear composite load. A positioning screw drives two ball moving devices to oppositely move in the axial direction; a sliding plate drives an ultrasonic loading device to move along the longitudinal direction of a dovetail groove of a supporting plate, so as to precisely determine a relative position of the ball test sample and the longitudinal vibrating test piece; the longitudinal vibrating test piece bear a longitudinal vibrating high-frequency cyclic load and a rolling wear composite load, so that the ultra-long cycle fatigue performances of different vibrating test piece materials under the action of the composite load can be tested; a longitudinal contact position of the longitudinal vibrating test piece and the ball test sample is adjusted to load vibrating friction displacements with different sizes onto the ball test sample; the ball moving device is connected with a ball clamping device, so that an ultrasonic fatigue test on two ball test samples can be realized at one time.

Description

technical field [0001] The invention relates to the technical field of rolling friction contact fatigue life testing, in particular to an ultrasonic high-frequency ball wear fatigue test device for testing the ultra-high-cycle fatigue life of ball wear and the ultra-high-cycle fatigue performance of vibration specimens under the action of rolling wear . Background technique [0002] In the fields of aerospace and railway transportation industries, mechanical structural components are subjected to the combined action of high-frequency vibration cyclic loads and rolling wear cyclic loads for a long time, and these load cycles are as high as 10 9 ~10 11 Week, which belongs to the category of ultra-high cycle, the composite damage caused by this kind of composite load will greatly accelerate the fatigue failure of mechanical structural parts. Therefore, it has become a new research topic to carry out the ultra-high cycle fatigue life test of high-frequency rolling wear samples...

AI Technical Summary

Problems solved by technology

[0003] Bearing is a supporting part of mechanical structure, which has been subjected to high-frequency cyclic load for a long time. Balls are the key components of bearings, and high-frequency rolling wear of balls is the main way of bearing damage. The existing special bearing fatigue test device has high test costs. There are many limiting factors in the test process, and there is no ultra-high cycle fatigue test device for high-frequency wear of balls

Invention patent 201010599535.7 discloses "a bearing roller contact fatigue testing machine and its operation method". High cost of life test time, while only one roller fatigue test can be performed at a time

On the other hand, there is no fatigue test device for testing the fatigue performance of components under the combined load of high-frequency rolling wear for a long time.

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