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首页> 外文会议>29th Leeds-Lyon Symposium on Tribology Sep 3-6, 2002 University of Leeds, UK >In situ pressure measurements in an elastohydrodynamically lubricated point contact using Raman microspectrometry. Comparison with numerical calculations
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In situ pressure measurements in an elastohydrodynamically lubricated point contact using Raman microspectrometry. Comparison with numerical calculations

机译：使用拉曼显微光谱法在弹性流体动力润滑点接触中进行原位压力测量。与数值计算的比较

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摘要

Raman microspectrometry has been applied to in situ pressure measurements in an elastohydrodynamically lubricated (EHL) point contact. An experimental set-up coupling a Raman spectrometer and an elastohydrodynamic ball on disc test rig has been developed. Pressure profiles and maps have been recorded under pure rolling conditions for a wide range of applied loads, rolling speeds and lubricant temperatures. The measured pressure profiles are compared quantitatively with numerical solutions of the isothermal EHL point contact problem. The good agreement obtained allows a validation of both the measurement method and the experimental set-up. Discrepancies between the experimental and the numerical profiles observed at high rolling speeds are attributed to inlet shear heating of the lubricant. The corresponding temperature rise is estimated. The evolution of the film thickness with speed is studied and the transition from isothermal to thermal regime is pointed out.
机译：拉曼光谱已应用于弹性流体动力润滑（EHL）点接触中的原位压力测量。已经开发了在圆盘试验台上耦合拉曼光谱仪和弹性流体动力学球的实验装置。在纯轧制条件下，已记录了各种应用载荷，轧制速度和润滑剂温度下的压力曲线和曲线图。将测得的压力曲线与等温EHL点接触问题的数值解进行定量比较。获得的良好协议可以验证测量方法和实验设置。在高轧制速度下观察到的实验曲线和数值曲线之间的差异归因于润滑剂的入口剪切加热。估计相应的温度上升。研究了膜厚度随速度的变化，指出了从等温到热态的转变。

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