A friction torque testing machine for aerospace bearings under simulated weightlessness

Abstract

A testing machine for simulating the friction moment of a spaceflight bearing under zero gravity mainly comprises an upper cover, a lower cover, a stand column, guide rods, supporting rods, a motor support, a motor, a coupler, a shaft, a bearing cap, an adjusting spacer, an elastic coil, a deep groove ball bearing, an angular contact bearing, a bearing bush A, an upper press sleeve, a bearing bush B, a thrust ball bearing, a sliding sleeve, a moving plate, a manual lifting platform, a lower cover vertical plate, a positioning plate, an electromagnet, a torque sensor, a flat key A, a hollow shaft, a flat key B, a level supporting rod, a sliding block, a flat key C, a guide flat key, an upper cover vertical plate, a bearing pedestal, a feeler gauge spacer, a support, a lever, a cylinder pin, a steel wire, a tray and weights.Compared with other tests for simulating zero weight, according to the testing machine, the established zero gravity time is long, the development cycle is short, and cost is very low.

Description

technical field [0001] The invention relates to a test device for simulating a weightless environment in space for an aerospace bearing. Background technique [0002] The working conditions of aerospace bearings are very demanding, and they need to work frequently under conditions such as weightlessness, extreme temperature, and vacuum. In practical applications at home and abroad, there have been "stuck" phenomena. Extreme conditions such as gravity, extreme temperature and vacuum cause ball bearings with repeated starts and low speeds to fail to start and run poorly. The stuck ball bearing shaft ring cannot rotate relative to the seat ring, and even the failure behavior that the starting friction torque is too large leads to deformation and fracture of the cage. In the current ground simulation test, only extreme temperature and vacuum are tested, and the bearing does not appear "stuck" phenomenon during start-up operation. It can be inferred that the cause of this phenom...

AI Technical Summary

Problems solved by technology

[0002] The working conditions of aerospace bearings are very demanding, and they need to work frequently under conditions such as weightlessness, extreme temperature, and vacuum. In practical applications at home and abroad, there have been "stuck" phenomena. Due to extreme conditions such as gravity, extreme temperature and vacuum, ball bearings with repeated starts and low speeds cannot start and run poorly

The lagging ball bearing shaft ring cannot rotate relative to the seat ring, and even the failure behavior that the starting friction torque is too large leads to deformation and fracture of the cage

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