变刚度支承下电磁轴承-转子系统振动特性研究  

Research on Vibration Characteristics of Magnetic Suspension Bearing-Rotor System Under Variable Supporting Stiffness

作　　者：魏子航 宋春生 李俊[1] 李民辉 WEI Zihang;SONG Chunsheng;LI Jun;LI Minhui(School of Mechanical & Electronic Engineering,WuHan University of Technology,Wuhan 430070,China;Hubei Provincial Engineering Technology Research Center for Magnetic Suspension,Wuhan 430070,China)

机构地区：[1]武汉理工大学机电工程学院,武汉430070 [2]湖北省磁悬浮工程技术研究中心,武汉430070

出　　处：《轴承》2022年第3期15-22,共8页Bearing

基　　金：国家重点研发计划资助项目(2018YFB2000103);深圳市科技计划资助项目(JCYJ20190809150603586);国家自然科学基金资助项目(51879209)。

摘　　要：旋转机械在运转过程中会在同频或倍频的扰动下产生转子振动,而电磁轴承具有刚度、阻尼可调的优势,能为抑制转子振动提供一种研究思路。以电磁轴承-转子系统为研究对象,验证了PID控制参数与等效刚度之间的关系,并分析控制参数对等效刚度的影响;将电磁轴承支承下刚性转子、柔性转子模型结合有限元分析软件进行对比分析,研究等效刚度对转子系统模态的影响;研究了电磁轴承支承下的振动传递特性,基于电磁轴承-柔性转子模型计算了力传递率,利用有限元软件通过谐响应分析计算了加速度响应,分析结果表明可以通过调节电磁轴承刚度,改变固有频率以减小振动。During operation of rotating machinery,rotor vibration will occur under the disturbance of same frequency or frequency doubling,and AMB has the advantages of adjustable stiffness and damping,which can provide a research idea to suppress rotor vibration.Taking AMB-rotor system as a research object,the relationship between PID control parameters and equivalent stiffness is verified,and the effect of control parameters on equivalent stiffness is analyzed.The rigid rotor and flexible rotor models supported by AMB are compared and analyzed with finite element analysis software to study the effect of equivalent stiffness on modal of rotor system.The characteristic of vibration transmission of AMB are studied,the force transfer rate is calculated based on AMB-flexible rotor model,and the acceleration response is calculated by using finite element software through harmonic response analysis.The analysis results show that the natural frequency can be changed by adjusting stiffness of AMB to reduce the vibration.

关 键 词：滑动轴承 磁力轴承 转子系统 振动 刚度 动力学模型 

分 类 号：TH133.31[机械工程—机械制造及自动化] TP273.2[自动化与计算机技术—检测技术与自动化装置]