Friction-wear testing machine capable of realizing variable gravity orientation and testing method

Abstract

The invention discloses a friction-wear testing machine capable of realizing variable gravity orientation and a testing method. A vacuum box is fixedly mounted on a rotating shaft, a support frame is arranged in the vacuum box, and a lever mechanism and a rotating mechanism are mounted on the support frame side by side; an upper test sample and a lower test sample are placed between the lever mechanism and the rotating mechanism from top to bottom; the lever mechanism provides downward press force for the upper test sample during testing, and the rotating mechanism provides rotating torque for the lower test sample during testing; when a driving mechanism drives the rotating shaft to rotate, the vacuum box, the lever mechanism and the rotating mechanism rotate synchronously along with the rotating shaft. During testing, the friction coefficients between test samples are obtained by the aid of the lever mechanism as well as pressure and friction force sensors matched with the lever mechanism. During testing, friction tests of the samples in high-temperature and / or low-temperature alternating complex environments can be simulated by heating and cooling the test samples. The friction-wear testing machine can obtain friction coefficients under different gravity effects and realize variable gravity orientation.

Description

technical field [0001] The invention relates to the field of material friction and wear testing, in particular to a friction and wear testing machine and a testing method with variable gravity orientation. Background technique [0002] In the field of aerospace, space agencies are exposed to environmental conditions such as microgravity, high vacuum, alternating temperature, and particle radiation for a long time. The friction and wear properties of materials under these conditions must be different from those on the ground. However, it is very difficult to realize the space environment, especially the microgravity environment, on the ground. The common methods for simulating microgravity on the ground include the drop tower method and the aircraft parabola method. Although the microgravity environment can be realized, the duration is short and the cost is very high. Therefore, it is difficult to use the above method to explore the effect of gravity on the friction and wear...

AI Technical Summary

Problems solved by technology

[0004] At present, there are relatively few studies centered on exploring the effect of gravity on the friction and wear properties of materials. In the field of aviation, on-orbit testing of materials can be carried out abroad, that is, testing directly in the space environment, but the cost is expensive and the process is cumbersome and lengthy. There are no conditions for on-orbit testing in China

[0005] In the field of automobile engines, the research on the friction and wear properties of cylinder liners and pistons is mostly based on the complete machine test, which is cumbersome to operate, high in cost and takes a long time

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