Air bearing

Abstract

The invention provides an air bearing. The air bearing comprises a bearing body and a pressure equalizing gasket; the bearing body is made of a silicon carbide material; an inlaying hole is formed inthe top of the bearing body; the pressure equalizing gasket is arranged in the inlaying hole and is matched with the inlaying hole in size; ventilation channels communicating with one another are formed in the bearing body; air inlets communicating with the ventilation channels are formed in the side of the bearing body; vent holes communicating with the ventilation channels are formed in the bottom of the bearing body; and an assembling hole is formed in the pressure equalizing gasket. The bearing body is made of the silicon carbide material and has the excellent characteristics of high oxidation resistance, high wear resistance, high hardness, high thermal stability, high high-temperature strength, small thermal expansion coefficient, high thermal conductivity, thermal shock resistance,chemical corrosion resistance and the like, the pressure equalizing gasket is made of a low-expansion alloy mostly, the excellent characteristics of the silicon carbide material are fully utilized, the defect of high brittleness of silicon carbide is overcome, and the air bearing can work in the severe environments such as high temperatures, large temperature differences and the like.

Description

technical field [0001] The invention relates to the field of bearings in mechanical components, in particular to an air bearing. Background technique [0002] Air bearings, also called air bearings, are mechanical components that use an air film to support loads or reduce friction. As a new type of sliding bearing, air bearing has four advantages of high speed, high precision, low power consumption and long life. It has important applications in the fields of precision and ultra-precision engineering, micro-engineering, space technology, aerospace medical equipment and nuclear energy engineering. [0003] With the development of science and technology, especially the high development of energy and space technology, it is often required that materials must have superior properties such as high temperature resistance, corrosion resistance, and wear resistance before they can be used in harsh working environments. The rigidity of silicon carbide is twice that of ordinary carb...

AI Technical Summary

Problems solved by technology

However, the silicon carbide material has low hardness, high brittleness, and is not easy to be processed. If it is improperly designed, it will easily cause instability, small bearing capacity, and low rigidity, which will cause air bearings to be easily worn during operation and have a short service life.

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