• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2017, Vol. 53 ›› Issue (17): 103-112.doi: 10.3901/JME.2017.17.103

• 机械动力学 • 上一篇    下一篇

考虑滑移流影响的新型弹性支承微型箔片动压气浮轴承的性能分析

冯凯1, 王乾振1, 李文俊1, 赵雪源1, 张智明2,3   

  1. 1. 湖南大学汽车车身先进设计制造国家重点实验室 长沙 410082;
    2. 同济大学汽车学院 上海 201804;
    3. 同济大学新能源汽车工程中心 上海 201804
  • 收稿日期:2016-05-04 修回日期:2017-01-15 出版日期:2017-09-05 发布日期:2017-09-05
  • 通讯作者: 张智明(通信作者),男,1979年出生,讲师。主要研究方向为燃料电池发动机及关键零部件技术。E-mail:zhangzm@tongji.edu.cn
  • 作者简介:冯凯,男,1982年出生,博士研究生导师。主要研究方向为微型燃气轮机、涡轮增加器、高速空压机等。E-mail:kfeng@hnu.edu.cn
  • 基金资助:
    国家自然科学基金(51575170)和国家科技部科技支撑计划(2015BAG06B01)资助项目

Static and Dynamic Performance Analysis of a Novel Mesoscale Gas Foil Bearings Consider the Effect of Slip Flow

FENG Kai1, WANG Qianzhen1, LI Wenjun1, ZHAO Xueyuan1, ZHANG Zhiming2,3   

  1. 1. State Key Laboratory of Advanced Design and Manufacturing for Vehicle body, Hunan University, Changsha 410082;
    2. School of Automotive Studies, Tongji University, Shanghai 201804;
    3. The Clean Energy Automotive Engineering Center, Tongji University, Shanghai 201804
  • Received:2016-05-04 Revised:2017-01-15 Online:2017-09-05 Published:2017-09-05

摘要: 针对新型弹性支承微型箔片动压轴承的弹性结构,提出了刚度预测模型,并搭载静态刚度测试试验台,验证了计算模型的正确性。通过耦合弹性结构刚度模型和考虑一阶滑移流的雷诺方程,研究了在滑移流影响下的轴承的静、动态特性。发现在定转速下,随着载荷的增加,滑移流对于轴承的偏心率和最小气膜厚度的影响逐渐增大;随着转速的增加轴承刚度逐渐增加,阻尼则逐渐减小;在滑移流影响下轴承刚度减小,阻尼增加。弹性支承结构的厚度和单元个数对于静动态结果影响明显。

关键词: 滑移流, 静动态特性, 微型空气箔片轴承, 有限差分法

Abstract: A stiffness model of the elastic foundation was carried out and a test rig was built to test the stiffness of the elastic layer. The test results confirmed the predictions. Static and dynamic performance of the bearing was predicted by coupling the stiffness model of the elastic foundation and the Reynolds equation which considering first order slip flow. Predictions show that the effects of slip flow become significant as the load increase. Dynamic stiffness coefficients increase as speed increase, whereas dynamic damping coefficients show opposite trend. The dynamic stiffness coefficients decrease when considering the effects of slip flow, while the dynamic damping coefficients increase. Moreover, the thickness and number of the elastic foundation influence the static and dynamic performance significantly.

Key words: FDM, microscale gas foil bearings, slip flow, static and dynamic performance

中图分类号: