Research on speeds influence on hydrostatic bearings stiffness

摘要：

　　Reynolds equation considering speed is solved using finite element method.Orifice hydrostatic gas bearings pressure distribution, load capacity and stiffness are obtained.Speeds influenced on stiffness is studied.Experiment is conducted on turbine expander.Rotor operates under unbalance masss excitation.By analysis whipping frequencys relation with the natural frequency of rotor-bearing system, stiffness can be calculated.The experiment result shows that bearings stiffness changes with rotors speed.When rotors speed is between 10000-50000 r/min,stiffness increased by 9.6 %.Because gas whirl only happens when rotors speed is above the first critical speed, the method has limited speed range.

关键词： hydrostatic bearing FEM bearings stiffness oscillation vibration

作者: Chen Changting Yang Jinfu Han Dongjiang Tang Changliang

作者单位: Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing, China

会议类型: 国际会议

会议名称: the International Conference Vibroengineering-2014

会议地点: 贵阳

会议语种:英文

页码: 113-118

在线出版日期: 2014-11-07（万方平台首次上网日期，不代表论文的发表时间）