Analysis for Hydrodynamic Foil Thrust Bearings Considering Temperature Effects

doi:10.7652/xjtuxb201411006

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Analysis for Hydrodynamic Foil Thrust Bearings Considering Temperature Effects

更新时间：2025-07-09

- Analysis for Hydrodynamic Foil Thrust Bearings Considering Temperature Effects
- Vol. 48, Issue 11, Pages: 32-36(2014)
- 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/xjtuxb201411006
  CLC： TH117.21
- Online First：10 November 2014，
  
  Published：2014
- 稿件说明：
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Analysis for Hydrodynamic Foil Thrust Bearings Considering Temperature Effects[J]. 2014, 48(11): 32-36.
DOI：

Analysis for Hydrodynamic Foil Thrust Bearings Considering Temperature Effects[J]. 2014, 48(11): 32-36. DOI： 10.7652/xjtuxb201411006.

摘要

为了探讨高温、高转速透平机械中影响箔片轴承性能的温度及气膜压力场分布等因素

对以弹性支撑结构刚度为常数的箔片动压止推轴承建立了雷诺方程和能量方程

并对轴承内部的气流速度进行了分析; 通过将气膜的温度、压力以及箔片的变形进行流固热多场耦合

采用有限差分法进行数值计算

得出了内部气膜温度和压力分布

由此分析了轴承结构刚度和轴承数的变化

以及气膜压力、温度和承载力的变化趋势。研究结果表明:支撑结构刚度增大

轴承间气膜的平均压力减小

平均温度上升; 轴承数增大

气膜的平均压力和温度升高。设计气体轴承时弹性支承结构的刚度与转子的转速应予以考虑。

Abstract

To investigate the influences of pressure and temperature distribution of gas film on the performance of foil bearings applied to turbomachineries at high temperature and speed

the Reynolds equation and the energy equation are established for a hydrodynamic foil bearing with constant stiffness of structural support

and gas velocity in the bearing is analyzed. Coupling the fields of temperature

pressure and deformation of top foil

finite difference method(FDM)is adopted to solve the equations

and pressure and temperature distribution of gas film are obtained. In the analysis

the variation tendency of pressure and temperature of gas is obtained with the changed dimensionless stiffness of support structure and bearing number. It is found that when the dimensionless stiffness of the support structure increases

the gas pressure decreases

however

the gas temperature behaves oppositely

and when the bearing number increases

the pressure and temperature of gas increase

thus the dimensionless stiffness of support structure and bearing number ought to be taken into account in gas foil bearing designing.

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references

PENG Z C, KHONSARI M M. A thermohydrodynamic analysis of foil journal bearings[J]. Journal of Tribology, 2006, 128(3): 534-541.

BRUCKNER R J. Simulation and modeling of the hydrodynamic, thermal, and structural behavior of foil thrust bearings[D]. Cleveland, Ohio, USA: Case Western Reserve University, 2004.

虞烈, 戚社苗, 耿海鹏. 可压缩气体润滑与弹性箔片气体轴承技术[M]: 北京: 科学出版社, 2011.

池长青. 气体动静压轴承的动力学及热力学[M]: 北京: 北京航空航天大学出版社, 2008.

SALEHI M, SWANSON E, HESHMAT H. Thermal features of compliant foil bearings: theory and experiments[J]. Journal of Tribology, 2001, 123(3): 566.

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