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Vibration mechanism analysis for cylindrical roller bearings with single/multi defects and compound faults

机译：单/多缺陷和复合故障的圆柱滚子轴承振动机理分析

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摘要

The generation of defects has a great influence on the vibration characteristic of roller bearings. Thus, it is very important to analyze the vibration mechanism of bearings with different kinds of defects by dynamic models which can make systematic descriptions of truly dynamic behavior. In this paper, dynamic models are developed based on the model proposed by Gupta to investigate the vibration mechanism of cylindrical roller bearings with localized defects. The inner raceway and rollers have five degrees of freedom (DOFs) in the model to better describe the complex dynamic behavior of bearings. Gyroscopic moment, centrifugal force and lubrication traction/slip between roller/raceway, roller/cage, cage/ raceway are completely included. Moreover, modeling methods of single defect, multi-defects and compound faults are introduced with the consideration of additional deflection and the change of contact force direction caused by defects. The differential equations used to describe the motions of bearing components are solved by the fourth order Runge-Kutta-Fehlberg scheme with step-changing criterion. Vibration responses of bearings with single defect, multi-defects and compound faults are simulated by the models and analyzed in both time domain and frequency domain. Experiments have been carried out on bearing test rig. The validity of models built in the paper is proved by comparing the simulation results with experiments. In addition, fruitful vibration responses are discovered and proposed, which will provide strong theoretical supports for fault diagnosis of cylindrical roller bearings.
机译：缺陷的产生对滚子轴承的振动特性产生了很大的影响。因此，通过动态模型分析具有不同种类缺陷的轴承的振动机制非常重要，这可以制定真正的动态行为的系统描述。在本文中，基于GUPTA提出的模型开发了动态模型，以研究圆柱形滚子轴承具有局部缺陷的振动机理。内滚道和滚筒在模型中有五个自由度（DOF）以更好地描述轴承的复杂动态行为。陀螺仪的时刻，离心力和润滑牵引牵引/滑动辊/滚道，滚轮/笼子，笼子/滚道之间。此外，考虑到额外的偏转和由缺陷引起的接触力方向的变化，引入了单缺陷，多缺陷和复合故障的建模方法。用于描述轴承部件动作的微分方程由具有阶跃改变标准的第四阶跑搏器-Fehlberg方案来解决。模型模拟了单缺陷，多缺陷和复合故障的轴承的振动响应，并在时间域和频域中进行分析。实验已经在轴承试验台上进行。通过将模拟结果与实验进行比较，证明了本文内置的模型的有效性。此外，发现并提出了富有成效的振动响应，这将为圆柱滚子轴承的故障诊断提供强大的理论支持。

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  • 来源
    《Mechanical systems and signal processing》 |2020年第10期|106903.1-106903.26|共26页
  • 作者

    Hongrui Cao; Shuaiming Su; Xin Jing; Denghui Li;

  • 作者单位

    School of Mechanical Engineering Xi'an Jiaotong University Xi'an 710049 PR China State Key Laboratory for Manufacturing Systems Engineering Xi'an Jiaotong University Xi'an 710049 PR China;

    School of Mechanical Engineering Xi'an Jiaotong University Xi'an 710049 PR China;

    School of Mechanical Engineering Xi'an Jiaotong University Xi'an 710049 PR China;

    School of Mechanical Engineering Xi'an Jiaotong University Xi'an 710049 PR China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Dynamic modeling; Cylindrical roller bearing; Localized defect; Compound faults;

    机译：动态建模;圆柱滚子轴承;局部缺陷;复合缺陷;

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