东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2007, Vol. 28 ›› Issue (9): 1313-1316.DOI: -

• 论著 • 上一篇    下一篇

油膜失稳引起的轴承碰摩故障研究

马辉;陈雪莲;王凯;闻邦椿;   

  1. 东北大学机械工程与自动化学院;辽宁省交通高等专科学校信息工程系;辽宁省高速公路管理局;东北大学机械工程与自动化学院 辽宁沈阳110004;辽宁沈阳110122;辽宁沈阳110003;辽宁沈阳110004
  • 收稿日期:2013-06-24 修回日期:2013-06-24 出版日期:2007-09-15 发布日期:2013-06-24
  • 通讯作者: Ma, H.
  • 作者简介:-
  • 基金资助:
    国家自然科学基金资助项目(50535010);;

On the rub-impact fault of bearings due to oil film instability

Ma, Hui (1); Chen, Xue-Lian (2); Wang, Kai (3); Wen, Bang-Chun (1)   

  1. (1) School of Mechanical Engineering and Automation, Northeastern University, Shenyang 110004, China; (2) Department of Information Engineering, Liaoning Communication College, Shenyang 110122, China; (3) Liaoning Province Expressway Management Bureau, Shenyang 110003, China
  • Received:2013-06-24 Revised:2013-06-24 Online:2007-09-15 Published:2013-06-24
  • Contact: Ma, H.
  • About author:-
  • Supported by:
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摘要： 为了研究油膜失稳和转子-轴承碰摩两种单一故障相互作用形成的耦合故障,利用转子实验台模拟油膜失稳引起的轴承碰摩故障,采集发生此故障时转子系统升降速过程的振动信号.利用三维谱振图、重排小波尺度图、频谱图和轴心轨迹图对竖直方向振动信号进行分析,结果表明:重排小波尺度图可以很好地提取轴承碰摩时的时间和频率信息.当转子系统发生二者耦合故障时,油膜失稳占主导地位,油膜失稳引起的碰摩会产生转频和涡动频率的组合频率成分.此外,由于不可公约的组合频率出现,轴心轨迹变得混乱不规则.

关键词: 油膜失稳, 碰摩, 耦合故障, 重排小波尺度图, 故障诊断

Abstract: To investigate systematically the coupling fault caused by the interaction between oil-film instability and rotor-bearing rub-impact, the coupling fault was simulated on a rotor test rig with the vibration signals acquired from rotor's speed up/down. The vibration signals in vertical direction are analyzed by 3D-waterfall spectrum, reassigned wavelet scalograms, amplitude spectrum and axial trajectory. The results show that the reassigned wavelet scalogram can extract well the time and frequency information on the rub-impact fault. When the coupling fault of rub-impact with oil film instability occurs, the oil film instability plays a major role in the rotor system, and the rub-impact caused by oil film instability will result in the two combination frequency components due to rotating and oil whirling. In addition, axial trajectory is found irregular and chaotic because there is no common factors found in the combined frequencies, which make them irreducible.

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