Static pressure air floatation thrust bearing based on multi-ring belt exhaust

Abstract

The invention discloses a static pressure air floatation thrust bearing based on multi-ring exhaust, and belongs to the technical field of gas bearings and gas lubrication. According to the static pressure air floatation thrust bearing, through a combined type flow control structure of small hole throttling at an air film inlet and porous throttling at an exhaust inlet, the effect of homogenizing pressure is achieved while it is guaranteed that the air flow is not lost, and the rigidity of the bearing is improved; small hole throttling is adopted in a throttler in the thrust bearing, diffusion flow of the throttler is guided in three different modes, namely first-stage pressure equalizing, second-stage pressure equalizing and porous ring pressure control, and the adjustable composite diffusion flow can improve the bearing capacity and rigidity of the bearing; according to the multi-ring exhaust structure in the thrust bearing, a gas film far away from a natural pressure boundary has a stable and adjustable pressure boundary, so that the static pressure gas thrust bearing has better self-adaptability and can adapt to various gas supply conditions and variable loads, the bearing, rigidity and stability of the static pressure gas bearing are considered, and the purpose that one shaft has multiple purposes is achieved.

Description

technical field [0001] The invention relates to an air-floating thrust bearing, in particular to a static pressure air-floating thrust bearing based on multi-ring exhaust gas. 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", patent CN201110070094.6 "double-cylindrical porous gas static pressure electric spindle", CN201410635802.X "a double hemispherical porous gas bearing with...

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Problems solved by technology

[0007] The purpose of the present invention is to solve the problems existing in the above-mentioned prior art that the porous material is easy to block and affect the performance of the bearing and the problem that the load and stability are difficult to balance due to the uncontrollable outlet pressure. Hydrostatic Air Thrust Bearings

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