摘要
介绍了一种基于超磁致伸缩驱动器(GMA)的油膜轴承试验台的工作原理,完成了GMA油膜轴承所支撑转子的轴心轨迹动态控制试验。试验结果表明,选择合适的控制电流和相位差后,该油膜轴承能够动态抑制所支撑转子的工频振动,明显缩小所支撑转子的轴心运动轨迹;对于某控制电流,存在一个能使系统的工频振动幅值最小的最佳相位差;随着控制电流的增大,最佳相位差有增加的趋势。试验结果证实了GMA油膜轴承具有强的轴心轨迹控制功能,能够抑制所支撑转子的振动,具有高的位置精度和旋转精度。
The principles of the testing rig supported by controllable oil-film bearing based on GMA were introduced. Dynamic experiments on rotor center trajectory by use of the controllable bearing were completed, whose results show that, if the appropriate control current and phase difference are adopted and imposed on GMA, the controllable hydrodynamic bearing can restrain the vibration value of rotor working frequency dynamically, and reduce obviously rotor center trajectory. Testing results also show that, for a certain control current, there is an optimal value of phase difference which can minimize the vibration amplitude of rotor working frequency; the optimal value of phase difference has a tendency to become bigger with the increase of control current. It is proved that the controllable journal hydrodynamic bearing with GMA has the strong ability to dynamically control the rotor-center locus and reduces the vibration of the rotor supported by the controllable bearing, with outstanding position and rotation precision.
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2016年第1期41-45,共5页
China Mechanical Engineering
基金
国家自然科学基金-河南人才培养联合基金资助项目(U1404515)
郑州轻工业学院骨干教师资助项目(2013000356)
关键词
油膜轴承
超磁致伸缩驱动器
轴心轨迹
动态试验
振动控制
oil-film bearing
gaint magnetostrictive actuator(GMA)
rotor center trajectory
dynamic testing
vibration control