Separated-type wave foil dynamic pressure gas thrust bearing

Abstract

The invention relates to a separated-type wave foil dynamic pressure gas thrust bearing capable of bearing certain axial load. The separated-type wave foil dynamic pressure gas thrust bearing comprises a bearing chassis, flat foil sheets, wave foil sheets and a gasket, wherein the circle of the bearing chassis is divided into a plurality of parts by clearances along the radius direction; the flat foil sheets and the wave foil sheets are inserted into the clearances; the gasket is inserted into a rectangular groove in the bearing chassis; a screw is screwed in a threaded hole at the rear part of the bearing chassis, and presses the gasket tightly so as to fix the foil sheets; the rigidity of the separated-type foil sheets can be changed along the radius direction and the circumference direction; the rigidity characteristic is beneficial to the adaptation of nonuniform pressure distribution for the bearing caused by velocity differences along the radius direction, so that the pressure can be homogenized, and the foil sheet deformation can be harmonized, and the bearing loading capability can be improved; slits among foil belts can ensure that the foil sheets prevent thermal deformation caused by nonuniform temperature distribution, and also can ensure that the bearing is adaptive to less axial deviation; the foil belts are connected integrally at free ends, and the damage on pressure air membrane surfaces caused by radial deviation of the foil sheets can be prevented.

Description

technical field [0001] The invention relates to a separated corrugated foil dynamic pressure gas thrust bearing capable of bearing a certain axial load, which belongs to the field of gas dynamic pressure lubrication. Background technique [0002] Dynamic pressure gas bearing is a fluid film lubricated bearing with gas as the lubricating medium. Compared with traditional liquid lubricated bearings and rolling bearings, dynamic pressure gas bearing has high speed, low friction, low noise, no pollution, High working precision and high reliability. Its working principle is to form two high-speed relative moving surfaces forming a wedge-shaped gap, and the gas is brought into the wedge-shaped gap under the action of the gas's own viscosity to form a dynamic pressure fluid film that can withstand axial loads. Compared with static pressure gas bearings, The aerodynamic pressure bearing does not require external high-pressure air source equipment, throttles, etc., and the structure...

AI Technical Summary

Problems solved by technology

The rotor system supported by rigid bearings is difficult to meet the requirements of reliability and stability, the bearing processing accuracy and assembly accuracy are high, and the problem of short service life has not been resolved

However, there are relatively few studies on foil aerodynamic thrust bearings, and its types are not as rich as radial bearings, and related theories and applications are relatively lacking.

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