A Foil Gas Bearing with Beam-Like Structure and Circumferentially Distributed Wave Foils
A technology of gas bearings and bearings, which is applied in the direction of rotating bearings, bearings, bearing components, etc., can solve the problems of large deformation, unfavorable bearing capacity, and low rigidity of gas bearing support foils, etc., to improve rigidity distribution and improve reliability Poor performance, the effect of improving the bearing capacity
Active Publication Date: 2015-09-30
HUNAN UNIV
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Problems solved by technology
This structure can to a certain extent solve the problem of low rigidity in the middle of the support foil of the gas bearing and excessive deformation during operation, which is not conducive to improving the bearing capacity of the bearing.
Method used
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Embodiment Construction
[0015] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0016] figure 1 It is a schematic diagram of the overall structure of the radial elastic foil gas dynamic pressure bearing. Radial elastic foil gas bearing consists of four parts: bearing sleeve 1, elastic support structure, foil fixing ring 2 and top foil 6, wherein the elastic support structure is composed of main support foil 4 and auxiliary support foil 5. The resilient support structure and the top foil together form the resilient support surface of the foil gas bearing.
[0017] figure 2 It is a schematic diagram of the main supporting foil and important shape parameters. Its total length is L, the width at both ends is B, and the length of the middle part with the largest width is A. The size of L is equal to the axial length of the bearing sleeve, and the length of section A accounts for five of L. Between one-third and on...
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The invention relates to a radial elastic foil gas bearing, in particular to an aero dynamic bearing in a similar beam structure and with bump foil distributed peripherally. The novel foil aero bearing comprises a bearing sleeve, an elastic support structure, top foil and a foil fixing device. The elastic support structure consists of support foil in two different shapes and formed by pressing metal foil, and wavelike bulges of the elastic support structure are distributed in a peripheral direction. One pressed main support foil is in a shape with two short sides and wide middle; similar beam structure of the main foil allows the rigidity in the middle of the bearing to be higher, and the other auxiliary foil can be filled in gaps between the main foil and provides auxiliary support for the end part of the bearing. The axial rigidity characteristic of the bearing can be changed conveniently by changing parameters such as change rules of heights, shapes and widths of the bulges of the foil in an axial direction, the deformation at the middle part of the bearing is reduced, and the carrying capacity of the bearing is improved.
Description
technical field [0001] The invention relates to a radial elastic foil gas bearing, more specifically, it relates to a gas dynamic pressure bearing with a beam-like structure and wave foils distributed along the circumference. Background technique [0002] Foil gas bearing is a self-acting elastically supported gas dynamic pressure bearing. It is composed of bearing sleeve, elastic support foil and top foil etc. Compared with ordinary rotor bearings, it has a series of advantages such as high speed, good precision, high reliability, no oil lubrication, small friction loss, and can work in high temperature environment. Foil gas bearings have broad application prospects in aerospace, national defense and military industries, including new-generation fighter jets, high-temperature gas turbines, cruise missiles, and ultra-low temperature cooling systems. At the same time, elastic foil bearing technology is also one of the core technologies of micro gas turbines for distributed ...
Claims
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IPC IPC(8): F16C27/02F16C33/06
CPCF16C17/024F16C27/02
Inventor 冯凯赵雪源郭志阳
Owner HUNAN UNIV