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首页> 外文会议>29th Leeds-Lyon Symposium on Tribology Sep 3-6, 2002 University of Leeds, UK >Journal Bearing Oil Film Measurement Using Ultrasonic Reflection
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Journal Bearing Oil Film Measurement Using Ultrasonic Reflection

机译：用超声波反射法测量轴颈轴承油膜

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摘要

A wave of ultrasound will reflect from a lubricant film between two bearing components. The response of the film to a sound wave depends on the acoustic and geometrical properties of the oil layer. For thin lubricant films the layer behaves as a spring and the proportion of the wave reflected (or the 'reflection coefficient') is related to the stiffness of the oil layer. This provides a method for determining the film thickness. An ultrasonic transducer has been mounted on the outside of a hydrodynamic journal bearing bush. Pulses are emitted through the bearing bush and reflected back from the oil film. The reflected pulses are picked up by the same transducer and processed to determine the proportion of the wave amplitude reflected. The film thickness has then been calculated from the reflection spectra. The film thickness has been determined for a range of steady state bearing operating conditions and the results compared, qualitatively, with published numerical solutions. The method has been shown to be robust and flexible and demonstrates the potential of an ultrasonic based lubricant film monitoring device.
机译：超声波将从两个轴承组件之间的润滑膜反射。膜对声波的响应取决于油层的声学和几何特性。对于薄润滑膜，该层表现为弹簧，反射波的比例（或“反射系数”）与油层的刚度有关。这提供了确定膜厚度的方法。超声换能器已安装在流体动力学轴颈轴承衬套的外部。脉冲通过轴承衬套发出并从油膜反射回来。反射的脉冲由同一换能器拾取，并进行处理以确定反射波幅度的比例。然后从反射光谱中计算出膜厚度。已经确定了一系列稳态轴承工作条件的膜厚，并将结果与​​公开的数值解进行了定性比较。该方法已显示出鲁棒性和灵活性，并展示了基于超声波的润滑膜监测装置的潜力。

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