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首页> 外文期刊>Mechanical systems and signal processing >Analytical and experimental investigation of vibration characteristics induced by tribofilm-asperity interactions in hydrodynamic journal bearings
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Analytical and experimental investigation of vibration characteristics induced by tribofilm-asperity interactions in hydrodynamic journal bearings

机译：呋喃代酯轴承型相互作用诱导抗振动特性的分析与实验研究

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摘要

Vibration analysis is an effective approach to condition monitoring of hydrodynamic journal bearings. However, the analysis is largely based on the understanding of asperity-asperity interactions due to severe wears in the late phase of bearing lifetime. It often provides very tight leading time for maintenance actions. Aiming at developing effective techniques for early wear monitoring, this paper investigates the excitation mechanisms and contributions of Tribofilm-Asperity Interaction (TAI) that occurs in the hydrodynamic lubrication regime of journal bearings. Analytical expressions for the microscopic pressure fluctuations with respect to the surface topography are derived using the perturbation techniques. The Spatial Power Spectral Density (SPSD), a feature of the non-Gaussian roughness surfaces for early wear, is used to analyse the microscopic pressure fluctuations. The effect of the SPSD and operating conditions on the random excitation are evaluated through numerical simulations. The bandwidth of such random excitation depends on the SPSD of dynamic asperities and rotational speeds simultaneously. The excitation intensity increases when the standard deviation or correlation length of the surface parameters increases. These agree well with the measurements for wide bearing conditions including different degrees of wears. This new efficient analysis and insightful findings provide new understanding for characterising noisy vibration signals for early wear monitoring of journal bearings.
机译：振动分析是一种有效的方法监测流体动力学轴承的方法。然而，分析主要基于对轴承寿命后期阶段的严重磨损引起的对抑制性的相互作用的理解。它通常提供非常紧密的维护行动的前期时间。旨在开发有效的早期磨损监测技术，本文研究了杂志轴承率（TAI）在轴颈轴承的流体动力学润滑制度中发生的杂波机制和贡献。使用扰动技术导出关于表面形貌的微观压力波动的分析表达。空间功率谱密度（SPSD），用于早期磨损的非高斯粗糙度表面的特征，用于分析微观压力波动。通过数值模拟评估SPSD和操作条件对随机激励的影响。这种随机励磁的带宽取决于动态粗糙度的SPSD和同时的转速。当表面参数的标准偏差或相关长度增加时，激发强度增加。这些与宽轴承条件的测量结果很好，包括不同程度的磨损。这种新的高效分析和富有洞察力的发现提供了新的理解，用于表征嘈杂的振动信号，用于期刊轴承的早期磨损监测。

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  • 来源
    《Mechanical systems and signal processing》 |2021年第3期|107227.1-107227.20|共20页
  • 作者

    Jiaojiao Ma; Hao Zhang; Shan Lou; Fulei Chu; Zhanqun Shi; Fengshou Gu; Andrew D. Ball;

  • 作者单位

    School of Mechanical Engineering Hebei University of Technology Tianjin 300401 China Centre for Efficiency and Performance Engineering University of Huddersfield Queensgate Huddersfield HD1 3DH UK;

    School of Mechanical Engineering Hebei University of Technology Tianjin 300401 China;

    EPSRC Future Metrology Hub University of Huddersfield Queensgate Huddersfield HD1 3DH UK;

    Department of Precision Instruments and Mechanology Tsinghua University Beijing 100084 China;

    School of Mechanical Engineering Hebei University of Technology Tianjin 300401 China;

    Centre for Efficiency and Performance Engineering University of Huddersfield Queensgate Huddersfield HD1 3DH UK;

    Centre for Efficiency and Performance Engineering University of Huddersfield Queensgate Huddersfield HD1 3DH UK;

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

    Journal bearings; Early wear monitoring; Tribofilm-asperity interaction; Surface topography; Resonant vibration;

    机译：轴承轴承;早期磨损监测;Tribofilm-asperity互动;表面形貌;共振振动;

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