Bearing friction torque testing mechanism in vacuum environment

Abstract

The invention discloses a bearing friction torque testing mechanism in a vacuum environment. The bearing friction torque testing mechanism comprises a rotating shaft system, a friction force testing mechanism, a friction force arm measuring mechanism and a driving lever mechanism. The driving lever mechanism, the rotating shaft system, the friction force testing mechanism and the friction force arm measuring mechanisms are installed side by side, the rotating shaft system is centered, the driving lever mechanism and the friction force testing mechanism are arranged on two sides, and the friction force arm measuring mechanisms are symmetrically arranged outside the driving lever mechanism and the friction force testing mechanism. In a traditional bearing friction torque test, the radius of a bearing sleeve sleeving a to-be-measured bearing is basically and directly used as a friction arm of the to-be-measured bearing, and errors caused by machining and mounting of the bearing sleeve are not considered, but a set of bearing friction arm measuring mechanism is designed to accurately measure the friction arm of the bearing, errors of test results are reduced, and a higher-precision bearing friction torque test is met.

Description

technical field [0001] The invention relates to the measurement field of bearing friction force and friction force arm in a vacuum environment, and more specifically, relates to a bearing friction torque testing mechanism in a vacuum environment. Background technique [0002] In the life test of aerospace bearings, friction torque is an important test parameter, and the impact of bearing lubrication performance degradation can be most directly reflected in friction torque. The frictional torque of the test bearing is load dependent. In the case of constant load, the friction torque of the bearing before running-in is relatively large. During the running-in process, the friction torque of the bearing gradually decreases, and finally tends to be stable. The bearing is in a working state and the lubrication state is stable. When the bearing is damaged or the lubrication fails, the friction torque of the bearing will increase greatly. It is an effective method to judge whether...

AI Technical Summary

Problems solved by technology

Using the sensor to measure the bearing friction force, and then calculating the bearing friction torque through the product of the bearing friction force and the bearing friction force arm is the main development trend of the bearing life test nowadays, but the existing bearing friction torque testing mechanism still has deficiencies First of all, due to the existence of machining errors and installation errors, there is no effective way to accurately measure the friction arm of the bearing in the high-precision test.

Secondly, because the friction force of the bearing is too small, in the dynamic balance system, the force measuring point will be separated from the force sensor, so that the data of the bearing friction force cannot be obtained

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