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首页> 外文期刊>Journal of Failure Analysis and Prevention >Investigation on Axial Displacement Fault Mechanism Based on Dynamic Characteristic Coefficients Identification of Tilting-Pad Thrust Bearing
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Investigation on Axial Displacement Fault Mechanism Based on Dynamic Characteristic Coefficients Identification of Tilting-Pad Thrust Bearing

机译：基于动态特性系数识别倾斜垫推力轴承轴向位移故障机理的研究

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摘要

To prevent the thrust bearing damage faults, the thrust bearing pad temperature and the static axial displacement variation are usually monitored and cared about, but axial vibration caused by axial dynamic excitation can also result in the severe rubbing. An electric oil pump system with overflow valve is designed on a similar industrial centrifugal compressor test-rig to apply the axial low-frequency excitation from 3 to 7?Hz, and the axial and radial vibration response amplitudes are analyzed. Then, the stiffness and damping coefficients of tilting-pad thrust bearing (TPTB) are identified by instrumental variable filter (IVF) algorithm to reveal the mechanism of TPTB dynamic characteristics affecting axial vibration. Finally, a fault case about surge and the rubbing of thrust bearing is studied. Compared with axial vibration, radial vibration does not directly correlate to axial excitation, and the axial frequency spectrum is an effective method to diagnose axial displacement faults; the static axial load, the dynamic excitation amplitude and the excitation frequency all exert influence on thrust bearing dynamic characteristics and axial vibration response. The research results can guide the design of thrust bearings and help to diagnose the axial displacement faults, while the test device and method can be used to measure the static and dynamic characteristics of thrust bearings.
机译：为了防止推力轴承损坏断层，通常监测和关心推力轴承焊盘温度和静态轴向位移变化，但由轴向动态励磁引起的轴向振动也可能导致严重的摩擦。具有溢流阀的电动油泵系统采用类似的工业离心压缩机试验台设计，以施加3至7Ω·赫兹的轴向低频激发，分析轴向和径向振动响应幅度。然后，通过仪器可变滤波器（IVF）算法识别倾斜焊盘推力轴承（TPTB）的刚度和阻尼系数，以揭示影响轴向振动的TPTB动态特性的机制。最后，研究了关于浪涌和推力轴承摩擦的故障情况。与轴向振动相比，径向振动与轴向激发直接相关，轴向频谱是诊断轴向位移断层的有效方法;静态轴向载荷，动态励磁幅度和励磁频率都对推力轴承动态特性和轴向振动响应产生影响。研究结果可以指导推力轴承的设计并帮助诊断轴向位移故障，而测试装置和方法可用于测量推力轴承的静态和动态特性。

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  • 作者

    Binbin Liu; Weimin Wang; Ya Zhang; Xing Shao; Weibo Li;

  • 作者单位

    Beijing Key Laboratory of Health Monitoring Control and Fault Self-recovery for High-end Machinery Beijing University of Chemical Technology;

    Beijing Key Laboratory of Health Monitoring Control and Fault Self-recovery for High-end Machinery Beijing University of Chemical Technology;

    Beijing Key Laboratory of Health Monitoring Control and Fault Self-recovery for High-end Machinery Beijing University of Chemical Technology;

    Beijing Key Laboratory of Health Monitoring Control and Fault Self-recovery for High-end Machinery Beijing University of Chemical Technology;

    Beijing Key Laboratory of Health Monitoring Control and Fault Self-recovery for High-end Machinery Beijing University of Chemical Technology;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 工程材料学;
  • 关键词

    Axial displacement fault; IVF algorithm; Thrust bearing; Dynamic characteristics;

    机译：轴向位移故障;IVF算法;推力轴承;动态特征;

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