Research on Dynamics of Magnetic Bearing Rotor Drop on Back-up Bearings

doi:10.3969/j.issn.1004-132X.2022.20.002

Abstract

Abstract: The studies of the nonlinear dynamics of the protective bearing-rotor system in the past 30 years were reviewed. Firstly， The development history of the local collision model was sorted out. the development of the system structure model from the two aspects of the rotor and the back-up bearing was summarized， and the characteristics of each model were given . Secondly， the main reason for back-up bearing—rotor system damage—backward whirl was analyzed. Then the relationship between the drop response results and the system structure and parameters was expoualded from three aspects of rotor structure， bearing structure and bearing parameters. Finally， some general guidelines for the design and selection of back-up bearings structure and parameters were summarized， and some issues which was worth further study were pointed out.

Key words: back-up bearing, backward whirl, nonlinear dynamics, rotor/stator rubbing

摘要： 调研了保护轴承-转子系统非线性动力学研究领域内近30年来的代表性成果。首先，梳理了局部碰撞模型的发展历史，分别从转子和保护轴承两方面对系统结构模型的发展进行了综述，并给出了各模型的特点；接着，从跌落响应形态切入，重点分析了保护轴承-转子系统损伤的最主要原因——后向涡动；然后，从转子结构、轴承结构和轴承参数三个方面，分析了跌落响应结果与系统结构及接触参数的关系；最后，通过总结归纳，给出了保护轴承结构和参数设计选用的通用准则，并提出了后续值得深入研究的几点问题。

关键词: 保护轴承, 后向涡动, 非线性动力学, 转子/定子碰摩

CLC Number:

TH133

WANG Junshui, JIA Xiangyu, ZHANG Kai, XU Yang. Research on Dynamics of Magnetic Bearing Rotor Drop on Back-up Bearings[J]. China Mechanical Engineering, 2022, 33(20): 2403-2413，2419.

汪军水, 贾翔宇, 张剀, 徐旸. 磁轴承转子跌落在保护轴承上的动力学研究[J]. 中国机械工程, 2022, 33(20): 2403-2413，2419.

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