电磁轴承水平转子跌落恢复控制策略研究  

Research on Recovery Strategy for the Horizontal AMB Rotor Drop Process

作　　者：赵宇兰 宫海龙 杨国军[2] 时振刚[2] 陈润年 赵雷[2] Yu-lan Zhao;Hai-long Gong;Guo-jun Yang;Zhen-gang Shi;Run-nian Chen;Lei Zhao(Central Academy,Harbin Electric Corporation;Institute of Nuclear and New Energy Technology,Tsinghua University)

机构地区：[1]哈电集团中央研究院 [2]清华大学核能与新能源技术研究院

出　　处：《风机技术》2020年第3期38-45,共8页Chinese Journal of Turbomachinery

基　　金：黑龙江省博士后基金项目资助(LBH-Z18046);中国博士后科学基金面上资助项目资助(2019M651256)。

摘　　要：为避免电磁轴承失效、过载等事故发生,在转子/电磁轴承系统中安装辅助轴承,为转子提供临时机械辅助支承,并可对转子起到限位的作用。本文建立动态模型对转子跌落动态特性进行研究。该模型可预测转子各自由度的位移及转动,并在考虑转子具有跌落碰撞可能的情况下,设计PID控制策略进行位置恢复控制。该控制策略可在转子受外界剧烈扰动而具有跌落趋势甚至已经发生碰撞的情况下,有效将转子恢复至无接触悬浮状态并避免碰撞进一步恶化的发生。In the case of AMB failures,emergencies,or overload conditions,the auxiliary bearing(AB)is applied as the backup protector to provide temporary mechanical support and displacement constraint for the dropping rotor.A detailed dynamic model is established to reveal the behavior of the dropping rotor.This model is able to describe the rotor displacement and inclination around each axis.Additionally,a PID control system for a magnetic bearing is designed with combination of contact possibilities.The control strategy mentioned in this paper is demonstrated theoretically as being effective in returning a rotor to the contact-free levitation position and avoiding further fierce contacts under several circumstances when external disturbance involved.

关 键 词：主动电磁轴承 辅助轴承 转子跌落 动态特性分析 位置恢复控制 水平转子 

分 类 号：TH133.3[机械工程—机械制造及自动化] TK05[动力工程及工程热物理]