High damping foil dynamic pressure gas bearing filled with metal particles

A technology of dynamic pressure gas bearings and gas bearings, which is applied in sliding contact bearings, rotating bearings, bearings, etc., can solve the problems of easy instability and low damping of foil dynamic pressure gas bearings, and solve the problems of poor reliability and damping The effect of increasing the value and increasing the stiffness

Active Publication Date: 2013-03-06
HUNAN UNIV
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Problems solved by technology

This structure can solve the problem of low damping and easy insta

Method used

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  • High damping foil dynamic pressure gas bearing filled with metal particles
  • High damping foil dynamic pressure gas bearing filled with metal particles
  • High damping foil dynamic pressure gas bearing filled with metal particles

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[0014] The present invention will be described in further detail below in conjunction with the accompanying drawings and examples.

[0015] figure 1 A schematic diagram of a foil dynamic radial gas bearing is shown. In radial bearings, the sleeve foil is formed by folding a piece of foil in half and then curling to form a cylindrical shell structure. The open end is the fixed end, and the folded part is the free end. The opening is connected with an elastic foil and the other end is sealed, and its shape is as figure 2 As shown in middle b; the elastic foil is wave-shaped, and the distance between the peak and the trough is exactly equal to the thickness of the gap in the casing of the foil casing. There is a short flat foil at the fixed end to connect with the foil, and its shape is as follows figure 2 Shown in a. The elastic foils are just able to be contained in the housing cavity of the sleeve foil, and they are welded together on the bearing sleeve at the open end of...

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Abstract

The present invention relates to a high damping foil dynamic pressure gas bearing filled with high temperature resistance metal particles, wherein a base structure comprises sleeve foil and an elastic foil bearing substrate. The gas bearing is characterized in that high temperature resistance metal particles are filled into a position between foils or a gap of the foil and are sealed, the metal particles produce friction during bearing working, and energy of vibration impact is absorbed so as to increase bearing damping. Compared with the existing foil gas bearing structure, the gas bearing of the present invention has the following characteristics that: the gap inside the foil is completely utilized, filling of the metal particles into the gap is adopted to improve bearing damping so as to solve the problem of easy instability of the gas bearing during high-speed operation to a certain degree and improve reliability of the gas bearing.

Description

technical field [0001] The invention relates to a gas bearing, in particular to a high-damping foil dynamic pressure gas bearing in which metal particles are arranged in the gaps of the foil. Background technique [0002] Gas bearings have the advantages of high speed, high precision, high temperature resistance, small friction loss, and long life. After rapid development in recent decades, gas bearings have been widely used in high-speed bearings, high-precision bearings and other fields. At present, various types of gas bearings have been developed, mainly divided into dynamic pressure type and static pressure type. In the dynamic pressure type, there are various structures such as foil type, herringbone groove type and side tilting tile type. Among them, the foil gas bearing has been widely concerned and researched due to its excellent performance. In the foil gas bearing, the foil is the main supporting structure, which should have a certain stiffness and damping, so t...

Claims

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Application Information

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IPC IPC(8): F16C17/12
Inventor 冯凯谢永强
Owner HUNAN UNIV
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