Experimental Study on Nonlinear Dynamic Characteristics of Gas Hybrid Bearing-flexible Rotor System
The paper provides experimental results for rotordynaminc performance of a rotor supported on two gas hybrid bearings with static and dynamic force characteristics.The test results evidence the vital effect of the reasonable feed pressure on rotor start-up responses and substantially higher threshold speeds of rotordynamic instability.As the supply pressure rises,the second mode whip vibration is eliminated,and the amplitude of the first mode whip vibration at varying supply pressure is smaller than than that in a single feed pressure at 0.4MPa.Higher supply pressures also offers larger bearing direct stiffness,so cylindrical,conical whirling and first natural frequency increase with bearing feed pressures.
gas hybrid bearing bearing feed pressure threshold speeds of instability rotor journal orbits bifurcation
Han Dongjiang Yang Jinfu Zhao Chen Chen Changting Zhang Zhanyi
Institute of Engineering Thermophysics,Chinese Academy of Sciences,Beijing,China
国际会议
南京
英文
1-4
2013-08-20（万方平台首次上网日期，不代表论文的发表时间）