高转速工况下箔片气体轴承结构优化  

Structure Optimization of Foil Gas Bearing at High Speed

作　　者：虞启辉[1] 夏莹 赵威凯 余长存 YU Qi-hui;XIA Ying;ZHAO Wei-kai;YU Chang-cun(School of Mechanical Engineering,Inner Mongolia University of Science and Technology,Baotou 014010,China;School of Automation Science and Electrical Engineering,Beihang University,Beijing 100191,China;Hubei Hangjia Magna Seating System Co.,Ltd.,Xiangyang 441057,China)

机构地区：[1]内蒙古科技大学机械工程学院,内蒙古包头014010 [2]北京航空航天大学自动化科学与电气工程学院,北京100191 [3]湖北航嘉麦格纳座椅系统有限公司,湖北襄阳441057

出　　处：《液压气动与密封》2024年第11期8-15,共8页Hydraulics Pneumatics & Seals

基　　金：国家自然科学基金(52065054)。

摘　　要：箔片气体动压轴承是一种利用环境气体作为工作介质的自适应式柔性动压轴承,具有高速、高效、耐高温、长寿命等特点,但箔片气体动压轴承在高转速工况下,轴承稳定性低,易发生结构变形,影响使用寿命。为了提高轴承高速工况下的稳定性,对箔片气体动压轴承的波箔与顶箔进行高转速工况下变形量的仿真分析与实验研究。结果表明,三瓣式箔片气体动压轴承在高转速工况下,轴承会发生晃动而产生形变。为了减小变形量,对其进行结构优化,提出了一种三瓣式箔片气体动压轴承的新型结构。对优化后的结构进行高速工况下变形量仿真分析,结果显示最大变形量由原来的0.348 mm降低到0.344 mm,最大变形量下降了0.989%,证明三瓣式箔片气体动压轴承新型结构可以有效控制波箔片的变形量。Foil gas dynamic pressure bearing is a kind of adaptive flexible dynamic pressure bearing using ambient gas as the working medium,which has the characteristics of high speed,high efficiency,high temperature resistance and long life.However,under the working condition of high speed,the bearing stability is low,and the structural deformation is easy to occur,which affects the service life.In order to improve the stability of the bearing under high speed conditions,the deformation of wave foil and top foil under high speed conditions is simulated and experimentally studied in this paper.The results show that the bearing of three-lobe foil gas dynamic pressure bearing will shake and deform under high speed conditions.In order to reduce the deformation and optimize its structure,a new structure of three-lobe foil gas dynamic pressure bearing was proposed.The simulation analysis of the optimized structure under high-speed conditions shows that the maximum deformation is reduced from 0.348 mm to 0.344 mm,and the maximum deformation is reduced by 0.989%.It is proved that the new structure of three-lobe foil gas dynamic pressure bearing can effectively control the deformation of wave foil.

关 键 词：箔片 气体动压轴承 转速 变形量 

分 类 号：TH138[机械工程—机械制造及自动化]