带主动磁轴承单盘转子的坠落瞬态响应  

Transient Response of Single Disk Rotor with Active Magnetic Bearings During Rotor Drop

作　　者：方之楚[1,2] L.E.Baret 

机构地区：[1]上海交通大学工程力学系 [2]美国弗吉尼亚大学机械工程系

出　　处：《上海交通大学学报》1996年第7期5-11,共7页Journal of Shanghai Jiaotong University

摘　　要：就磁轴承发生故障时转子坠入备用轴承所产生的非线性瞬态响应，提出了摩擦力的计算模型，从理论上建立了更为精确的运动微分方程．数值积分结果预示，当备用轴承具有很小阻尼或很大阻尼时，会导致系统破坏的逆回旋．为保证系统安全运行。A Coulomb friction model with high accuracy is proposed so that more accurate equations of motion can be established for the transient response of the single disk rotor which drops onto the back up bearing as soon as AMB shuts down. The results of numerical integration predict that there will be backward whirl of the rotor, which may lead to destructive damage of the system if the back up bearing has very light or very high damping. For the purpose of safe rotor operation, the optimum damping range of the back up bearing is computed for various rotor system parameters.

关 键 词：转子系统 磁轴承 备用轴承 摩擦力 瞬态响应 

分 类 号：TH133[机械工程—机械制造及自动化]