东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2013, Vol. 34 ›› Issue (4): 564-568.DOI: -

• 机械工程 • 上一篇    下一篇

转子系统不对中-碰摩耦合故障的动力学特性

刘杨，太兴宇，赵倩，闻邦椿   

  1. (东北大学机械工程与自动化学院，辽宁沈阳110819)
  • 收稿日期:2012-09-20 修回日期:2012-09-20 出版日期:2013-04-15 发布日期:2013-06-19
  • 通讯作者: 刘杨
  • 作者简介:刘杨(1982-)，男，辽宁沈阳人，东北大学讲师，博士；闻邦椿(1930-)，男，浙江杭州人，东北大学教授，博士生导师，中国科学院院士.
  • 基金资助:
    国家自然科学基金资助项目(51105065)；中央高校基本科研业务费专项资金资助项目(N110203001).

Dynamic Characteristics of MisalignmentRubbing Coupling Fault for Rotor System

LIU Yang， TAI Xingyu， ZHAO Qian， WEN Bangchun   

  1. School of Mechanical Engineering ＆ Automation， Northeastern University， Shenyang 110819， China.
  • Received:2012-09-20 Revised:2012-09-20 Online:2013-04-15 Published:2013-06-19
  • Contact: LIU Yang
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摘要： 针对由于轴承不对中而引起不对中-碰摩耦合故障的转子-轴承系统，建立了双盘不对中-碰摩耦合故障转子系统力学模型和有限元模型.基于非线性有限元方法，使用等效不对中力矩及接触理论研究了不同转速对系统动力学特性的影响.研究结果表明，不对中-碰摩耦合故障常常以碰摩故障特征为主，并且二倍频出现较早及其峰值会急速增大.进一步运用小波基函数对故障信号进行等宽频带的划分，通过对故障转子系统频域响应中二倍频峰值变化趋势的分析研究发现，可将二倍频比例值作为含有不对中故障转子系统故障严重程度的一个判断依据.

关键词: 轴承不对中, 碰摩, 双盘转子, 耦合故障, 故障频带

Abstract: For the misalignmentrubbing coupling fault rotorbearing system caused by misaligned bearing， mechanical and finite element models of dualdisk misalignmentrubbing coupling fault rotorbearing system were established. The equivalent misalignment moment and contact theory were used to study the effect of rotational speed on the dynamics characteristics with the nonlinear finite element method. The results showed that the misalignmentrubbing coupling fault mainly embodied in the rubbing fault， and the frequencydoubled appeared early with the peak increased rapidly. The fault signal was further divided to same width parts with the wavelet basis function， and the change trend of the double frequency peak showed that the double frequency ratio value is a judgment basis for the fault degree of the rotor system containing misalignment fault.

Key words: misaligned bearing, rubbing, dualdisk rotor, coupling fault, fault band

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