Journal-foil air bearing

An air bearing, foil technology, applied in the direction of bearings, bearing components, shafts and bearings, etc., can solve problems such as dynamic instability, achieve the effect of reducing the number, minimizing exposure, and preventing damage

Active Publication Date: 2011-04-06
NEUROS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is to provide a radial foil air bearing structure, which provides a top foil structure to reduce the number of components and minimize the exposure of the fixed part of the top foil, and solve the problem of dynamic instability when the rotor rotates at high speed question
In addition, the purpose

Method used

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Embodiment Construction

[0030] Preferred embodiments of the present invention will now be explained with reference to the accompanying drawings.

[0031] figure 1 A radial foil air bearing 1000 according to a first embodiment of the invention is shown.

[0032] As shown, a bearing housing 10 is provided having a bore 18 in which the rotor 8 is disposed.

[0033] A bump foil is disposed along the inner periphery 188 of the bore 18 of the bearing housing 10, and a top foil is disposed along the top end of the bump foil.

[0034] According to some embodiments of the present invention, at least two bump foils are arranged along the inner circumference of the hole of the bearing housing and are spaced apart from each other. Also, only one top foil is provided. As described below, the top foil is provided by a circumferential foil. However, more than one top foil may be arranged radially on top of each other to increase damping.

[0035] In this embodiment, two bump foils are disposed along the inner ...

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PUM

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Abstract

A journal foil air bearing 5000 according to the present invention is provided with one top foil 300 along an inner periphery of a hole 18 of a bearing housing 10. Bump foils 20c and 20d are installed at the inner periphery of the hole 18 of the bearing housing 10 where they are distanced from each other. Both ends of the top foil 300 form bent portions 308a and 308b and the bent portions 308a and 308b are mounted in a slot 414 of a slot body 40 mounted in a slot 140 provided in the inner periphery of the hole 18 in the bearing housing 10 and the top foil 300 is elastically movable therein.

Description

technical field [0001] The present invention relates to a radial foil air bearing. Background technique [0002] A foil air bearing is a bearing that supports a load by air pressure that enters between the rotor or bearing disc and the foil in contact with it as the rotor rotates at high speed. produced by viscous air. [0003] Among foil air bearings, radial foil air bearings (journal foil air bearings) generate dynamic instability of the rotor-bearing system at high speeds. That is, when the rotor rotates at a high speed, the dynamic characteristics become unstable and some problems such as vibration occur. [0004] Dynamic instability can be caused by unexpected pressure distributions between the rotor and the foil, and can be affected by frictional damping of the foil structure or mass imbalance of the rotor. This dynamic instability is not conducive to the stable operation of the rotor and should be resolved. [0005] Typically, radial foil air bearings consist of o...

Claims

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Application Information

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IPC IPC(8): F16C32/06
CPCF16C17/024F16C17/02F16C43/02F16C27/02F16C32/06
Inventor 金庆秀
Owner NEUROS
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