Circumferential film thickness measurement in journal bearings via the ultrasonic technique
Circumferential film thickness measurement in journal bearings via the ultrasonic technique
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DOI：
10.1016/j.triboint.2020.106295
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发表时间：
2020-08-01
影响因子：
6.2
通讯作者：
Dwyer-Joyce, R.
中科院分区：
文献类型：
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作者：
Beamish, S.;Li, X.;Dwyer-Joyce, R.
流体动压轴颈轴承性能的一个关键参数是轴-轴承界面周围润滑层的厚度。在目前的工作中，应用超声波振幅、相变和共振浸入技术，在一系列轴对中、轴错位和停机操作条件下，在定制的轴颈轴承测试平台中获得周向薄膜厚度分布。将薄膜厚度结果与 Raimondi-Boyd 理论预测模型和涡流传感器测量结果进行比较。通过使用在线参考技术，振幅和相位变化模型证明了薄膜的高精度，并且共振浸入技术使得能够在轴承厚膜区域内进行薄膜测量。因此，同时应用这三种方法可以分析轴承圆周周围的润滑油膜。
A key parameter in hydrodynamic journal bearing performance is lubricant layer thickness around the circumference of the shaft-bearing interface. In the present work, the ultrasonic amplitude, phase change and resonant dip techniques are applied to obtain circumferential film thickness profiles in a bespoke journal bearing test platform under a range of shaft-aligned, shaft-misaligned and shut-down operating conditions. Film thickness results are compared against the Raimondi-Boyd theoretical prediction model and eddy current sensor measurements. By using an on-line referencing technique, the amplitude and phase change models demonstrated high accuracy for thin films and the resonant dip technique enabled film measurements within the bearing thick film region. Thus, applying the three methods simultaneously allowed analysis of lubricant films around the bearing circumference.