Air bearing

Abstract

The invention provides an air bearing comprising a porous throttle structure, a back structure, a ventilation inlet, a uniform pressure guiding structure, a butterfly spring and a bearing sliding block, wherein the bottom of the uniform pressure guiding structure is connected to the top of the back structure, and the top of the uniform pressure guiding structure is provided with a guide rod; the butterfly spring is located on the guide rod of the uniform pressure guiding structure; the bearing sliding block is located on the butterfly spring, and the bottom of the bearing sliding block is provided with a concave structure corresponding to the guide rod; the sufficient contact between the bottom of the bearing sliding block and the butterfly spring in the stress process is ensured through the concave structure. According to the air bearing provided by the invention, through designing the uniform pressure guiding structure and a flexible structure, uniform pressure distribution of an air film of the air bearing is ensured, and the self-excitation problem of an air hammer of the air bearing is solved; and the bearing stability is improved.

Description

technical field [0001] The invention belongs to the field of ground microgravity simulation test of spacecraft, and in particular relates to an air bearing. Background technique [0002] The micro-low gravity simulation test of a large spacecraft is an essential ground test to ensure its effective operation in orbit. The accuracy of the test equipment will directly affect the accuracy of the spacecraft ground test, thereby affecting the spacecraft's in-orbit performance. [0003] As the key equipment in the process of spacecraft microgravity ground simulation test, the performance of static pressure air bearing will directly affect the accuracy of ground test. In view of the current development trend of large and ultra-large spacecraft with increasing load and higher precision, and the external environment with increasingly complex ground test environment requirements and large test area, traditional static pressure air bearings are faced with large loads and Complex bounda...

AI Technical Summary

Problems solved by technology

In view of the current development trend of large and ultra-large spacecraft with increasing load and higher precision, and the external environment with increasingly complex requirements for ground test environments and large test areas, traditional static pressure air bearings are faced with large loads and Complex boundary conditions, due to the uneven distribution of gas film pressure due to the concentration of loads, combined with the complex test environment, lead to sudden changes in the thickness of the gas film during the operation of the bearing, resulting in the phenomenon of air hammer self-excitation and induced system coupling vibration of ground equipment , which has a great influence on the accuracy of the ground simulation test

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