Air floatation thrust bearing based on axial dense ball suction loading

Abstract

The invention discloses an air floatation thrust bearing based on axial dense ball suction loading, and belongs to the technical field of gas bearings and gas lubrication. The device comprises an air floating shaft, an air floating sleeve, a thrust plate and a suction loading device, wherein the air floating shaft is in a T shape, the air floating shaft and the thrust plate are installed on the two sides of the air floating sleeve, and a steel ball in a retainer is located between the air floating shaft and the air floating sleeve so that the air floating shaft and the air floating sleeve can be in interference fit. The rotation precision is improved by utilizing the air bearing, the radial run-out of the bearing is reduced, and meanwhile, the axial bearing, the rigidity and the overall stability of the main shaft are improved by utilizing a dense ball shaft system. According to the invention, the dense ball shaft system is combined with an air floatation bearing technology, and the air floatation thrust bearing based on axial dense ball suction loading is provided, so that the purpose of considering both the bearing precision and the load bearing is achieved.

Description

technical field [0001] The invention relates to an air-floating thrust bearing, in particular to an air-floating thrust bearing based on axial dense ball absorption. Background technique [0002] Due to its significant advantages such as long life, high precision, low power consumption, good damping characteristics, wide speed range and easy processing, static pressure air bearings are widely used in precision and ultra-precision engineering, micro-engineering, space technology, aerospace medical equipment and nuclear energy. It has important applications in engineering and other fields. For this reason, many scholars have conducted continuous research on it in order to realize the optimization and improvement of bearing performance. [0003] Patent CN200810209792.8 "a porous gas static pressure thrust bearing" and patent CN201810910337.4 "a vacuum adsorption type porous gas static pressure thrust bearing" both describe air bearings made of porous materials. To a certain e...

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Problems solved by technology

[0007] The purpose of the present invention is to solve the problem of high precision but often poor load-carrying performance of the air bearing technology existing in the above-mentioned prior art, and combine the dense ball bearing system with the air bearing technology to reduce the radial runout of the bearing, and at the same time use the dense ball The shaft system improves the axial load and rigidity, achieving the goal of bearing precision and load bearing

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