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Face Rub-Impact Monitoring of a Dry Gas Seal Using Acoustic Emission

机译：利用声发射监测干气密封件的端面摩擦影响

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摘要

Face rub-impact of a dry gas seal was investigated using acoustic emission (AE) technology. A force applicator was designed and mounted on the seal test rig to provide controlled misalignment and thus induce rub-impact of the seal faces. Two types of AE sensor were mounted at different positions on the seal. For the PICO AE sensor mounted directly on the seal ring, the root mean square (RMS) of the original AE signal was sensitive to face rub-impact of the seal. When force was applied, the AE RMS of the PICO sensor gave a distinct periodic waveform with a period consistent with the rotational period above an initial noise signal. The magnitude and shape of the waveform changed as the applied force increased. For the R15α AE sensor mounted on the housing of the seal, no obvious changes could be found from the RMS of the original AE signal synchronously obtained during loading. Two kinds of signal processing methods were tried to eliminate noise. After band-pass filtering, the RMS of the AE signals of the R15α sensor indicated face rub-impact when the misalignment was relatively large. The empirical mode decomposition method using masking signals was found to be more effective than band-pass filtering in eliminating the noise but took much more computational time. The results indicate that the AE technology is a potentially effective tool in monitoring and investigating face rub-impact of dry gas seals.
机译：使用声发射（AE）技术研究了干气密封件的表面摩擦影响。设计了一个力施加器并将其安装在密封测试装置上，以提供可控的未对准并因此引起密封面的摩擦冲击。两种类型的AE传感器安装在密封件上的不同位置。对于直接安装在密封环上的PICO AE传感器，原始AE信号的均方根（RMS）对密封件的端面摩擦影响敏感。当施加力时，PICO传感器的AE RMS会给出明显的周期性波形，其周期与高于初始噪声信号的旋转周期一致。波形的大小和形状随作用力的增加而变化。对于安装在密封件外壳上的R15αAE传感器，从加载过程中同步获取的原始AE信号的RMS值中找不到明显的变化。尝试了两种信号处理方法来消除噪声。经过带通滤波后，当未对准程度相对较大时，R15α传感器的AE信号的RMS表示面部受到摩擦。发现使用掩蔽信号的经验模式分解方法在消除噪声方面比带通滤波更有效，但需要更多的计算时间。结果表明，AE技术是监测和调查干气密封件表面摩擦影响的潜在有效工具。

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  • 来源
    《Tribology Letters》 |2013年第2期|253-259|共7页
  • 作者

    Weifeng Huang; Youbin Lin; Ying Liu; Xiangfeng Liu; Zhi Gao; Yuming Wang;

  • 作者单位

    State Key Laboratory of Tribology Tsinghua University">(1);

    State Key Laboratory of Tribology Tsinghua University">(1);

    State Key Laboratory of Tribology Tsinghua University">(1);

    State Key Laboratory of Tribology Tsinghua University">(1);

    State Key Laboratory of Tribology Tsinghua University">(1);

    State Key Laboratory of Tribology Tsinghua University">(1);

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

    Dry gas seal; Acoustic emission; Rub-impact; Monitoring;

    机译：干气密封;声发射;摩擦影响监控方式;

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