摘要
随着轴承系统高转速、高效率的发展需求,磁液双悬浮轴承转子与静子的装配间隙不断减小,导致碰摩事故经常发生。综合考虑转子偏心比、转速比、磁液双悬浮轴承与静子碰摩等多种耦合故障,建立磁液双悬浮轴承转子系统“间隙-碰摩”动力学方程,数值模拟转子运行规律。研究结果表明:随着偏心比的增加,转子由周期1运行演化出周期2、周期3、拟周期、混沌等多种运行规律;当偏心比ρ∈(0.28~0.4)及转速比w∈(1.2~1.7)时,转子位移波动剧烈,在此区域内转子极易发生分岔甚至混沌,且在碰摩区间内,转速比在1.5、1.67附近时,转子轴承处与转盘处碰撞力分别出现最大值。
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 chaos,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.
作者
闫伟东
赵建华
马立勇
郑永杰
刘稀瑶
YAN Weidong;ZHAO Jianhua;MA Liyong;ZHENG Yongjie;LIU Xiyao(School of Mechanical Engineering,Hebei University of Architecture,Zhangjiakou Hebei 075000,China;Hebei Provincial Key Laboratory of Heavy Machinery Fluid Power Transmission and Control,Yanshan University,Qinhuangdao Hebei 066004,China;State Key Laboratory of Crane Technology,Yanshan University,Qinhuangdao Hebei 066004,China;Civil Air Defense Command Information Security Center,Zhangjiakou Hebei 075000,China)
出处
《机床与液压》
北大核心
2024年第11期177-183,共7页
Machine Tool & Hydraulics
基金
国家自然科学基金面上项目(52075468)
河北省自然科学基金面上项目(E2020203052)
中央引导地方科技发展资金项目(自由探索类基础研究)(236Z1901G)
燕山大学基础创新科研培育项目(2021LGZD003)。
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
magnetic-liquid double suspension bearing
clearance-rubbing
dynamic behaviors
bifurcation and chaos
rotor cou-
