Thermohydrodynamic lubrication analysis of micro gas bearing with journal misalignment

Yao WU; Wenjun XI; Caili ZHANG; Jujiang CAO; Lihua YANG

doi:10.13224/j.cnki.jasp.20210209

Chinese

您当前的位置：

首页 >

文章列表页 >

Thermohydrodynamic lubrication analysis of micro gas bearing with journal misalignment

Power Transimission | 更新时间：2025-03-14

- Thermohydrodynamic lubrication analysis of micro gas bearing with journal misalignment
- Journal of Aerospace Power Vol. 37, Issue 9, Pages: 1979-1991(2022)
- 作者机构：
  
  1.陕西科技大学机电工程学院，西安 710021
  2.施耐德（西安）创新技术有限公司低压事业部，西安 710075
  3.西安交通大学航天航空学院，西安 710049
- 作者简介：
- 基金信息：
- DOI：10.13224/j.cnki.jasp.20210209
  CLC：
- 稿件说明：
移动端阅览
Yao WU, Wenjun XI, Caili ZHANG, et al. Thermohydrodynamic lubrication analysis of micro gas bearing with journal misalignment[J]. Journal of Aerospace Power, 2022, 37(9): 1979-1991.
DOI：

Yao WU, Wenjun XI, Caili ZHANG, et al. Thermohydrodynamic lubrication analysis of micro gas bearing with journal misalignment[J]. Journal of Aerospace Power, 2022, 37(9): 1979-1991. DOI： 10.13224/j.cnki.jasp.20210209.

摘要

基于能量守恒原理推导计入气体稀薄效应的修正能量方程及其有限差分表达式，并通过偏导数法和有限差分法联立求解修正Reynolds方程、修正能量方程、气体黏温关系和气膜厚度方程，详细研究了微型气体轴承静动态性能随结构参数、轴颈倾斜方位角和黏温热效应的变化规律。结果表明：气膜热效应提高了微型气体轴承的承载能力、摩擦因数和动态刚度系数，而降低了直接阻尼系数，轴颈倾斜误差对微型气体轴承的静、动态性能均产生不利影响，计算结果可为提高微型气体动压轴承⁃转子系统的稳定性提供重要理论依据。

Abstract

Due to the ultra‑thin gas film of microbearing and various loads caused by the high‑speed rotation of micro rotor，the effects of gas rarefaction，viscosity‑temperature relation and journal misalignment on the lubrication characteristics of micro gas bearing cannot be neglected.The modified energy equation and its finite difference expression considering rarefaction effect were derived based on the energy conversation，and the modified Reynolds equation，modified energy equation，gas viscosity‑temperature relationship and film thickness equation were solved simultaneously by partial derivative method and finite difference method.The influences of structural parameters，misalignment angle and thermal effect on static and dynamic performance of microbearings were investigated in detail.Results showed that the load capacity，friction coefficient and dynamic stiffness coefficient of gas microbearing were improved by the gas film temperature，while the direct damping coefficient was reduced.The journal misalignment had an adverse influence on the static and dynamic performance of microbearing.Therefore，the results can provide an important theoretical basis for improving the stability of gas microbearing‑rotor system in microfluidic devices.

关键词

Keywords

references

燕震雷 , 伍林 . 稀薄效应对可倾瓦动压气体轴承性能的影响 [J]. 航空动力学报 , 2020 , 35 （ 7 ）: 1496 ⁃ 1505 .

YAN Zhenlei , WU Lin . Effect of rarefied effect on the performance of tilting pad dynamic pressure gas bearings [J]. Journal of Aerospace Power , 2020 , 35 （ 7 ）: 1496 ⁃ 1505 . （in Chinese）

EZZAT H A , ROHDE S M . A Study of the thermohydrodynamic performance of finite slider bearings [J]. Journal of Tribology , 1973 , 95 （ 3 ）: 298 ⁃ 307 .

MAJUMDAR B C . The thermohydrodynamic solution of oil journal bearings [J]. Wear , 1975 , 31 （ 2 ）: 287 ⁃ 294 .

ZHANG S , BOGY D B . A heat transfer model for thermal fluctuations in a thin slider/disk air bearing [J]. International Journal of Heat & Mass Transfer , 1999 , 42 （ 10 ）: 1791 ⁃ 1800 .

BOUYER J , FILLON M . Improvement of the THD performance of a misaligned plain journal bearing [J]. Journal of Tribology , 2003 , 125 （ 2 ）: 334 ⁃ 342 .

MICHAUD P , SOUCHET D , BONNEAU D . Thermohydrodynamic lubrication analysis for a dynamically loaded journal bearing [J]. Proceedings of the Institution of Mechanical Engineers:Part J Journal of Engineering Tribology , 2007 , 221 （ 1 ）: 49 ⁃ 61 .

JANG J Y , KHONSARI M M . On the behavior of misaligned journal bearings based on mass⁃conservative thermohydrodynamic analysis [J]. Journal of Tribology , 2010 , 132 （ 1 ）: 1 ⁃ 13 .

BAI S , PENG X , MENG Y , et al . Modeling of gas thermal effect based on energy equipartition principle [J]. Tribology transactions , 2012 , 55 （ 6 ）: 752 ⁃ 761 .

黎伟 , 汪久根 , 洪玉芳，等 . 考虑轴颈偏斜的多瓦径向滑动轴承热流体动力润滑分析 [J]. 润滑与密封 , 2012 , 37 （ 11 ）: 1 ⁃ 4 .

LI Wei , WANG Jiugen , HONG Yufang , et al . Thermo⁃elastohydrodynamic lubrication analysis on multi⁃tilting⁃pad journal bearing with misalignment [J]. Lubrication Engineering , 2012 , 37 （ 11 ）: 1 ⁃ 4 . （in Chinese）

ŞEN S , DARICI S . Transient conjugate heat transfer in a circular microchannel involving rarefaction,viscous dissipation and axial conduction effects [J]. Applied Thermal Engineering , 2017 , 111 : 855 ⁃ 862 .

LINJAMAA A , LEHTOVAARA A , LARSSON R , et al . Modelling and analysis of elastic and thermal deformations of a hybrid journal bearing [J]. Tribology International , 2018 , 118 : 451 ⁃ 457 .

YANG J , PALAZZOLO A . Three⁃dimensional thermo⁃elasto⁃hydrodynamic computational fluid dynamics model of a tilting pad journal bearing:Part Ⅰ static response [J]. Journal of Tribology , 2019 , 141 （ 6 ）: 061702.1 ⁃ 061702.21 .

YANG J , PALAZZOLO A . Three⁃dimensional thermo⁃elasto⁃hydrodynamic computational fluid dynamics model of a tilting pad journal bearing:Part Ⅱ dynamic response [J]. Journal of Tribology , 2019 , 141 （ 6 ）: 061703.1 ⁃ 061703.16 .

LI L , ZHANG D , XIE Y . Effect of misalignment on the dynamic characteristic of MEMS gas bearing considering rarefaction effect [J]. Tribology International , 2019 , 139 : 22 ⁃ 35 .

DUWENSEE M . Numerical and experimental investigations of the head/disk interface [M]. San Diego : University of California , 2007 .

FATU A , HAJJAM M , BONNEAU D . A new model of thermoelastohydrodynamic lubrication in dynamically loaded journal bearings [J]. Journal of Tribology , 2006 , 128 （ 1 ）: 53 ⁃ 54 .

YANG L , LI H , YU L . Dynamic stiffness and damping coefficients of aerodynamic tilting⁃pad journal bearings [J]. Tribology International , 2007 , 40 （ 9 ）: 1399 ⁃ 1410 .

戚社苗 , 耿海鹏 , 虞烈 . 动压气体轴承的动态刚度和动态阻尼系数 [J]. 机械工程学报 , 2007 （ 5 ）: 91 ⁃ 98 .

QI Shemiao , GENG Haipeng , YU Lie . Dynamic stiffness and dynamic damping coefficients of aerodynamic bearings [J]. Chinese Journal of Mechanical Engineering , 2007 （ 5 ）: 91 ⁃ 98 . （in Chinese）

吴垚 , 杨利花 , 徐腾飞，等 . 气体动压径向轴承超薄气膜润滑动特性分析 [J]. 振动工程学报 , 2019 , 32 （ 5 ）: 908 ⁃ 917 .

WU Yao , YANG Lihua , XU Tengfei , et al . Analysis on dynamic characteristics of the ultra⁃thin gas film lubrication in cylindrical gas journal bearing [J]. Journal of Vibration Engineering , 2019 , 32 （ 5 ）: 908 ⁃ 917 . （in Chinese）

ORR D J . Macro⁃scale investigation of high speed gas bearings for MEMS devices [D]. Cambridge : Massachusetts Institute of Technology , 2000 .

LEE Y B , KWAK H D , KIM C H , et al . Numerical prediction of slip flow effect on gas‑lubricated journal bearings for MEMS/MST⁃based micro⁃rotating machinery [J]. Tribology international , 2005 , 38 （ 2 ）: 89 ⁃ 96 .

Views

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Lubrication characteristics in contact state of journal bearings inside aero gear pump

与发动机匹配的旁路式双喉道气动矢量喷管数值模拟研究

基于三维接触摩擦单元的套齿连接解析建模研究

组合式弹性金属密封泄漏特性实验研究与结构优化

基于自适应MOMEDA滚动轴承故障特征提取方法

Related Author

ZHU Jiaxing

LI Huacong

FU Jiangfeng

Related Institution

No data

AI问答

Postal code：100079
Tel：（010）53879206 Email：tmw@bjxintong.com.cn
Technical support is provided by Beijing Founder electronics co., LTD 京ICP备09082226号-64 京公网安备11010602201714号
It is recommended to read the content of this site in Chrome&IE9+. Please switch to extreme mode in browser 360.
Cookies We use cookies to help provide and enhance our service and tailor content. By continuing, you agree to the use of cookies.

⁰