摘要
During the operation of magnetic liquid double suspension bearing(MLDSB),due to rotor resonance,assembly error and other factor,the vibration amplitude of the rotor in resonance state exceeds the original design clearance,resulting in the collision damage between the rotor and the stator,the rotor and the casing.This paper presents a method to simulate the influence of different factors on the dynamic characteristics of 5 degrees of freedom(DOF)rotor based on the dynamic model of MLDSB.Firstly,according to the second Lagrange equation,the dynamic equation of 5 DOF rotor is derived,and the mathematical model is established.Then,based on 5 DOF rotor dynamic equation,the rotor transient dynamic equation under collision state is obtained,and the rotor transient collision dynamic simulation model is established.Finally,the key influencing factors of rotor dynamic characteristics are extracted,and the influence mapping relationship of rotor displacement,axis locus and stress distribution under different factors is simulated by using ANSYS Workbench software.The experimental results show that this method can effectively reflect the influence of various factors on the dynamic characteristics of the rotor.This method can provide theoretical reference for the design and control of MLDSB.
作者
刘洪美
LI Shengguo
SUN Chao
SUN Yanan
ZHAO Jianhua
LIU Hongmei;LI Shengguo;SUN Chao;SUN Yanan;ZHAO Jianhua(Shijiazhuang Rail Transit Group Co.Ltd,Shijiazhuang 050011,P.R.China;Shijiazhuang Haishan Industrial Development Co.Ltd,Shijiazhuang 050200,P.R.China;Hebei Provincial Key Laboratory of Heavy Machinery Fluid Power Transmission and Control,Yanshan University,Qinhuangdao 066004,P.R.China)
基金
Supported by the National Natural Science Foundation of China(No.52075468)。