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An elastic foil gas bearing with bolted and adjusted preload

An elastic foil and gas bearing technology, which is applied to shafts and bearings, rotating bearings, bearings, etc., can solve the problems of failure, elastic foil gas bearing wear, elastic foil gas bearing failure, etc., and achieves low cost, The effect of high precision and simple structure

Inactive Publication Date: 2015-08-05
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the fixing problem between the top foil and the bottom arch foil in the elastic foil gas bearing, it is easy to be dragged out by the rotor forcibly during take-off and shutdown, causing the elastic foil gas bearing to fail
Increasing the preload of the elastic foil gas bearing can improve the load capacity of the elastic foil gas bearing, but it is more likely to cause wear and failure of the elastic foil gas bearing

Method used

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  • An elastic foil gas bearing with bolted and adjusted preload
  • An elastic foil gas bearing with bolted and adjusted preload
  • An elastic foil gas bearing with bolted and adjusted preload

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Embodiment Construction

[0028] The structural principle and working principle of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0029] see figure 1 , 2 , 3, 4, 5, 6 and 7, an elastic foil gas bearing fixed by bolts and adjusted for preload, including a shaft 1, and the second curved surface 14 of the periodically uniformly distributed top layer foil 2 is attached to the shaft 1 On the journal 9, the arch foil 19 of the bottom arch foil 3 is supported under the first curved surface 12 of the top layer foil 2, and the first arc surface 18 of the bottom arch foil 3 is attached to the second arc surface of the bearing seat 6 28 and the third arc surface 34 of the second gasket 7, the first plane 10 of the fixed top layer foil 2 and the second plane 16 of the bottom arch foil 3 are sequentially pasted on the first gasket 4, the first chamfer 11 of the fixed top layer foil 2, the second chamfer 17 of the bottom arch foil 3 and the third ch...

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Abstract

The invention discloses an elastic foil gas bearing utilizing a bolt to fix and adjust pre-tightening. The elastic foil gas bearing comprises a shaft, wherein top foils are periodically and uniformly distributed and attached on the shaft neck of the shaft, bottom arch foils are supported below the top foils and attached on a bearing seat, a fixed top foil and a fixed bottom arch foil are attached on a first gasket in sequence, the top foils are in a multi-tile periodical overlapping structure and form a curved surface, a second gasket is attached inside the bearing seat, and a second screw is supported against the second gasket and is attached on the top foils above the bottom arch foils, thus forming the elastic foil gas bearing. The elastic foil gas bearing disclosed by the invention can bear a higher bearing capacity and a self-adaptive deformability, and has the characteristics of simple structure, adjustable pre-tightening and high accuracy.

Description

technical field [0001] The invention belongs to the technical field of oil-free lubricating bearings, in particular to an elastic foil gas bearing fixed by bolts and adjusted for preload. Background technique [0002] The elastic foil gas bearing has good self-adaptability, and can run for a long time under high temperature, high speed and high pollution conditions. It does not need auxiliary devices such as oil supply or control system, so the structure is simple. Due to the fixing problem between the top foil and the bottom arch foil in the elastic foil gas bearing, it is easy to be forcibly dragged out by the rotor during take-off and shutdown, resulting in the failure of the elastic foil gas bearing. Increasing the preload of the elastic foil gas bearing can improve the bearing capacity of the elastic foil gas bearing, but it is more likely to cause wear and failure of the elastic foil gas bearing. Contents of the invention [0003] In order to overcome the deficienci...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16C27/02
CPCF16C43/02F16C17/024
Inventor 耿海鹏杨柏松刘俊里戚社苗丁春华孙岩桦虞烈
Owner XI AN JIAOTONG UNIV
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