Effects of Coulomb Friction on Bump Foil Gas Bearing

ZHAO Qi; REN Xionghao; HOU Yu; CHEN Shuangtao; LAI Tianwei

doi:10.7652/xjtuxb202207019

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Effects of Coulomb Friction on Bump Foil Gas Bearing

更新时间：2025-07-09

- Effects of Coulomb Friction on Bump Foil Gas Bearing
- Vol. 56, Issue 7, Pages: 177-183(2022)
- 作者机构：
  
  西安交通大学能源与动力工程学院,西安,710049
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb202207019
  CLC： TH133
- Online First：10 July 2022，
  
  Published：2022
- 稿件说明：
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ZHAO Qi, REN Xionghao, HOU Yu, et al. Effects of Coulomb Friction on Bump Foil Gas Bearing[J]. 2022, 56(7): 177-183.
DOI：

ZHAO Qi, REN Xionghao, HOU Yu, et al. Effects of Coulomb Friction on Bump Foil Gas Bearing[J]. 2022, 56(7): 177-183. DOI： 10.7652/xjtuxb202207019.

摘要

为了深入了解库伦摩擦对波箔气体轴承特性的影响

考虑了波箔片与平箔片间摩擦力以及波箔片与轴承座间摩擦力

通过有限元梁单元模型计算波箔轴承单个波拱的位移

采用能量耗散的方法对波箔轴承的刚度和阻尼特性进行了评价

分析了载荷基准值和载荷波动幅值以及摩擦因数对库伦阻尼耗散能量以及箔片刚度特性的影响规律。研究结果表明:随着载荷基准值和载荷波动幅值增大

库伦阻尼耗散能量明显增加

有助于提高轴承运行的稳定性; 载荷波动幅值增大

波箔轴承刚度先迅速减小然后逐渐趋于稳定; 载荷基准值变化对波箔刚度影响较小

波箔刚度基本不发生变化。载荷由最大值逐渐减小时

波箔拱顶部摩擦力刚开始时仍为滑动摩擦力。进入滞止阶段后

滑动摩擦力逐渐转变为静摩擦力且摩擦力方向逐渐由同向变为反向。箔片轴承设计过程中

应以支撑刚度或阻尼耗散为目标

选择最优的摩擦因数。

Abstract

In this paper

the friction between the bump foil and the flat foil and between the bump foil and the bearing housing is taken into account to evaluate the effects of coulomb friction on bump foil gas bearing. The displacement of a single bump is calculated using the finite element beam model. Thereafter

the stiffness and damping characteristics of the bearing are evaluated through energy dissipation method. The effects of load reference value

load fluctuation amplitude and friction coefficient on energy dissipation and foil stiffness are analyzed. The results indicate that the energy dissipation increases as the reference value and fluctuation amplitude increase

which is conducive to the operating stability. The stiffness grows rapidly and then asymptoticly stabilizes as the amplitude increases. The stiffness basically does not change with the reference value. When the load decreases from the maximum value

the friction at the bump top still remains as sliding friction at the beginning. After entering the hysterias condition

the sliding friction gradually turns into static friction

and the direction of friction changes from the same direction to the opposite direction. In the bearing design process

the optimal friction coefficient should be selected properly based on the principle in favor of support stiffness or energy dissipation.

关键词

Keywords

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