• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2016, Vol. 52 ›› Issue (3): 86-92.doi: 10.3901/JME.2016.03.086

• 摩擦学 • 上一篇    下一篇

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基于拟动力学的航空发动机主轴滚子轴承热弹流润滑分析

史修江,  王黎钦   

  1. 哈尔滨工业大学机电工程学院  哈尔滨  150001
  • 收稿日期:2015-02-01 修回日期:2015-08-10 出版日期:2016-02-05 发布日期:2016-02-05
  • 通讯作者: 王黎钦,男,1964年出生,博士,教授,博士研究生导师。主要研究方向为航空宇航摩擦学与高性能滚动轴承。 E-mail:lqwang@hit.edu.cn
  • 作者简介:史修江,男,1989年出生,博士研究生。主要研究方向为航空发动机主轴承动力学与摩擦学耦合分析。 E-mail:shixiujiang@163.com
  • 基金资助:
    国家重点基础研究发展计划(973计划,2013CB632305)和国家自然科学基金(51373186)资助项目

TEHL Analysis of Aero-engine Mainshaft Roller Bearing Based on Quasi-dynamics

SHI Xiujiang,  WANG Liqin   

  1. School of Mechatronics Engineering, Harbin Institute of Technology, Harbin 150001
  • Received:2015-02-01 Revised:2015-08-10 Online:2016-02-05 Published:2016-02-05

摘要: 以D1842926航空发动机主轴滚子轴承典型工况为算例,基于拟动力学分析结果,获得滚动体与套圈之间的接触微区运动和受力状态,分别用Hamrock-Dowson(H-D)拟合公式,Wilson-Sheu(W-S)热修正公式和热弹流数值法得到最小膜厚,并与试验测试数据进行了对比,结果表明,H-D最小膜厚误差非常大,W-S热修正最小膜厚比H-D误差要小,但误差仍在40%以上,文中数值结果与试验数据较为一致,误差10%以内;对比不同速度下三种算法的最小膜厚分布,低速时三者较为一致,随着速度的提高,H-D最小膜厚误差越来越大,而W-S最小膜厚在速度增大到一定程度后反而降低;随着径向载荷的增大,润滑膜压力增大,膜厚减小,两端的压力略高于中间;随着转速增大,润滑膜膜厚增大,压力基本没有变化。

关键词: 航空发动机主轴滚子轴承, 拟动力学, 热弹流, 载荷, 转速, 最小膜厚

Abstract: Taking type D1842926 aero-engine mainshaft roller bearing under typical operating conditions as cases, based on quasi-dynamic results, the motion and force at micro-contact region are obtained, and the minimum film thickness(MFT) are calculated with H-D formula, W-S formula and thermal elastohydrodynamic lubrication (TEHL) analysis, the MFT of the 3 algorithms are compared with testing results, which indicate H-D MFT have a large error, though the error of W-S MFT is smaller than that with H-D formula, the error is still above 40%, the numerical analysis results show a well agreement with testing data and the error is within10%. The MFT under different velocities are compared with 3 algorithms, which show well agreements under low velocity, but the error of H-D MFT becomes larger with the increasing velocity, and W-S MFT become smaller as the velocity reaches a certain value; The global film pressure increase and the thickness decrease with the increase of radial load, the pressure in both ends are a little higher than that in the middle; The film thickness increase with the increase of velocity, but the pressure keep unchanged.

Key words: aero-engine mainshaft roller bearing, load, minimum film thickness, quasi-dynamics, TEHL, velocity

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