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.
出处
《上海交通大学学报》
EI
CAS
CSCD
北大核心
1996年第7期5-11,共7页
Journal of Shanghai Jiaotong University
关键词
转子系统
磁轴承
备用轴承
摩擦力
瞬态响应
rotor system
magnetic bearing
back up bearing
friction
non linear transient response
optimal damping coefficient