With the development needs of high speed and high efficiency of bearing system,the assembly clearance between rotor and stator of magnetic-liquid double suspension bearing(MLDSB)decreases continuously,which leads to frequent rubbing accidents.Considering the coupling faults of rotor eccentricity ratio,rotating speed ratio,the MLDSB and stator rubbing,the"clearance-rubbing"dynamic differential equation of magnetic-liquid double suspension bearing rotor system was established and the rotor dynamic behavior was simulated numerically.The results show that with the eccentricity ratio increases,the rotor has evolved from periodic-1 to periodic-2,periodic-3,quasi-periodic,chaos and so on;the rotor displacement fluctuates violently,which is prone to bifurcation and even cha-os,when the eccentricity ratio ρ changes from 0.28 to 0.4 and the speed ratio w changes from 1.2 to 1.7;the impact force at the rotor bearing and the turntable is the maximum respectively,when the speed ratio is near 1.5 and 1.67.
关键词
磁液双悬浮轴承/间隙-碰摩/动力学行为/分岔与混沌/转子耦合故障
Key words
magnetic-liquid double suspension bearing/clearance-rubbing/dynamic behaviors/bifurcation and chaos/rotor cou-pling fault
维普
万方数据