Three Lobe Gas Foil Radial Bearings
A technology of air bearings and foils, applied in the direction of bearings, bearing components, shafts and bearings, can solve problems such as improvement
Active Publication Date: 2018-08-10
HUNAN UNIV
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Problems solved by technology
However, in the existing technical solutions, the foil bearings only simply change the wave foil parameters on the basis of the predecessors, and fail to make essential improvements in the bearing structure.
Method used
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[0020] The present invention will be further described below in conjunction with specific embodiments of the present invention. However, it should be understood that the following specific embodiments are only preferred technical solutions of the present invention, and should not be construed as limitations on the present invention.
[0021] Such as figure 1 As shown, the air bearing includes a bearing sleeve 1, a first layer of elastic support foil 2, a second layer of elastic support foil 3 and a top layer of foil 4, the bearing sleeve, the first layer of elastic support foil, the second layer of elastic support foil The second layer of elastic support foil and the top layer of foil are arranged coaxially from outside to inside in turn. The first layer of elastic supporting foil includes several elastic small pieces with tapered size, and the plurality of elastic small pieces are evenly distributed in the first layer of elastic foil, see figure 2 . The second layer of ela...
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The invention discloses a radial elastic air bearing. The bearing is mainly composed of a bearing sleeve, three first-layer elastic supporting foil pieces, three second-layer elastic supporting foil pieces and three top-layer foil pieces. Three circular arcs, divided by three dovetail grooves, on the inner wall of the bearing sleeve is not concentric with the outer wall of the bearing, and the eccentric distance exists. Three uniformly distributed dovetail grooves are formed in the inner wall of the bearing sleeve and are used for fixing the elastic supporting foil pieces and the top-layer foil pieces. During assembly, elastic patches of the first-layer elastic supporting foil pieces stretch out of gaps between elastic patches of the second-layer elastic supporting foil pieces and slender beams. During working, rabbit-ear-shaped parts of the first-layer elastic supporting foil pieces are deformed at first, and when the pressure given by a rotor is increased, the elastic patches of the second-layer elastic supporting foil pieces are deformed. The radial elastic air bearing provides high carrying capacity, stability and rigidity, the carrying capacity, rigidity, stability and other static characteristics of existing gas bearings are comprehensively improved to a certain degree.
Description
technical field [0001] The invention relates to the technical field of air bearings, in particular to a gas foil radial bearing. Background technique [0002] Gas foil bearing is a kind of sliding bearing with gas as lubricant. Its principle is that the fluid forms a thin film under the action of external pressure to support the external load. Compared with traditional air bearings, it uses elastic support elements and its bearing surface is flexible, which makes this bearing have the characteristics of vibration and shock resistance, high stability, excellent start-stop performance and low assembly alignment requirements, and has The advantages of high speed, high precision, high reliability, oil-free lubrication, low friction loss and ability to work in high temperature environment. [0003] The foil air bearing is mainly composed of a bearing sleeve, an elastic support structure and a top layer of foil. The elastic support structure is located between the bearing sleeve ...
Claims
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IPC IPC(8): F16C17/02F16C33/06
CPCF16C17/024F16C33/06
Inventor 冯凯黄明吕鹏张涛
Owner HUNAN UNIV