上海交通大学学报

上海交通大学学报（自然版） ›› 2012, Vol. 46 ›› Issue (09): 1503-1508.

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Jeffcott转子-环流耦合系统动力学建模及分析  

 师名林, 王德忠, 张继革   

  1. (上海交通大学 机械与动力工程学院， 上海 200240)
  • 收稿日期:2011-12-16 出版日期:2012-09-28 发布日期:2012-09-28
  • 基金资助:

    国家重点基础研究发展规划（973）项目资助（2009CB724302）

Dynamic Modeling and Analysis of Jeffcott Rotor-Annular Flow Coupled System

 SHI  Ming-Lin, WANG  De-Zhong, ZHANG  Ji-Ge   

  1. (School of Mechanical Engineering, Shanghai Jiaotong University, Shanghai 200240, China)
  • Received:2011-12-16 Online:2012-09-28 Published:2012-09-28

摘要： 基于湍流整体流动理论和摄动分析，建立了Jeffcott转子-环流耦合系统的动力学模型，并以大型屏蔽电机泵转子系统为例，采用复模态分析方法分析了转速、转子偏心和定、转子壁面摩擦效应对转子-环流耦合系统动力学特性的影响.结果表明：环流将导致转子的固有频率大幅下降，并产生模态分叉和跳变；转子偏心将导致转子失稳并使其失稳转速下降；定、转子壁面的摩擦效应能够显著提高转子的失稳转速.
   

关键词: 转子, 环流, 动力学, 复模态分析

Abstract: Based on the turbulent bulk flow theory and perturbation analysis, a dynamic model of Jeffcott rotor-annular flow coupled system was developed. Taking a large-scale canned motor pump rotor system as an example, the effects of rotating speed, rotor eccentricity, and stator and rotor wall frictions on dynamics of the rotor-annular coupled system were investigated using the complex mode analytical method. The analytical results show the annular flow causes the decrease of natural frequency greatly and generates divergence and leap of mode, the rotor eccentricity induces instability of rotor and the decrease of instability speed, and the stator and rotor wall friction effects increase rotor instability speed significantly.

Key words: rotor, annular flow, dynamics, complex mode analysis

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