A thrust surface floating gas static pressure bearing

Abstract

The invention discloses a gas static pressure bearing with a floating thrust surface. The gas static pressure bearing comprises a bearing body, a bearing lining, a floating thrust surface body and an elastic plate, wherein the bearing body sleeves the bearing lining; one end of the bearing body is connected with one end of the elastic plate in a sealing manner; the other end of the elastic plate is connected with the floating thrust surface body in the sealing manner; the elastic plate and the floating thrust body are connected with one end, in the axial direction, of the bearing body in sequence; a plurality of gas holes which are communicated in a matched manner are formed in the bearing body, the elastic plate and the floating thrust body; the elastic plate is made of an elastic material. According to the technical scheme, the thrust surface is changed to be in a floating type structure, so that a gas film clearance between the gas bearing and a shaft body is uniform, eccentric force of the bearing is reduced, and the axial bearing capacity of the gas bearing is greatly improved; and therefore, the gas bearing can be used for bearing a high axial load and achieving the high flow and the high rotating speed.

Description

technical field

[0001] The invention belongs to the technical field of machinery and relates to a thrust surface floating gas static pressure bearing applied to a gas bearing. Background technique

[0002] Gas bearings have the advantages of low friction, low power consumption, low gas consumption, no pollution, low noise, simple structure and convenient operation, and are widely used in high-speed turbo expanders. Since the gas is continuously exhausted from the outer edge of the bearing into the atmosphere, the gas has no boundary lubrication capability. In high-speed operation, the linear velocity is usually up to 100 m / s. If the load of the gas bearing exceeds the specified value, direct contact with solids will occur immediately and it will be stuck. Therefore, at present, the gas bearing can only be used for turboexpanders with small flow rates. And if figure 1 and figure 2 As shown in , a gas bearing with a fixed thrust surface 10 and an oblique gas hole 11 is gen...

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