电磁阻尼器在线消除转子不平衡振动实验  

Experiment of Online Compensation of Rotor Unbalance Vibration Using Active Magnetic Damping

作　　者：苏奕儒[1] 何立东[1] 黄立权[1] 

机构地区：[1]北京化工大学诊断与自愈工程研究中心,北京100029

出　　处：《振动．测试与诊断》2011年第2期167-170,264,共4页Journal of Vibration,Measurement & Diagnosis

基　　金：国家自然科学基金重点资助项目(编号:50635010)

摘　　要：研究了利用电磁阻尼器在线消除旋转机械运行过程中产生的不平衡振动问题。在分析电磁阻尼器的在线平衡原理基础上,建立了一套电磁阻尼器-转子系统实验台。通过控制两对磁极增益电流的大小及相位,实现了在转子上施加同频的电磁平衡力,达到了消除转子本身不平衡力的目的。研究结果表明,通过对电磁力的相位和大小进行优化控制,可以使2号轴承的水平和垂直方向振动分别降低了69%和55.6%,平衡后两个测量平面的同频振动分量均未超过10μm。实验结果证明,所采用的电磁阻尼器可以在不停机的情况下,对转子进行有效在线平衡,有助于延长转子的稳定运行周期。An active electromagnetic damping was adopted to suppress the unbalanced vibration of rotor online.Based on analysis of the online balancing principle of electromagnetic damping,a damping-rotor test rig was established to investigate the active balancing function of electromagnetic damping.Synchronizing electromagnetic forces were obtained by controlling the gain currents of two sets coils to compensate the original imbalance of the rotor body.The experimental results indicate that,by using the optimized magnitude and the phase of electromagnetic force,it is possible to reduce the vibration peak value of No.2 bearing in horizontal and vertical directions about 69% and 55.6%,respectively,and the vibration peak value of the four measuring points is lower than 10 μm after the automatic balancing process.From this example,it can be concluded that the method can effectively control the vibration induced by the rotor unbalance without shutdown process.

关 键 词：转子 振动 电磁轴承 电磁阻尼器 在线平衡 

分 类 号：TH113.2[机械工程—机械设计及理论] O328[理学—一般力学与力学基础]