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首页> 外文期刊>Tribology International >Thermal point contact EHL analysis of rolling/sliding contacts with experimental comparison showing anomalous film shapes
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Thermal point contact EHL analysis of rolling/sliding contacts with experimental comparison showing anomalous film shapes

机译：滚动/滑动触点的热点接触EHL分析，并通过实验比较显示异常薄膜形状

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The paper presents an experimental and numerical investigation of non-conformal lubricated contacts in which anomalous film shapes occur. The experiments were concerned with the contact between a steel ball and the plane surface of a glass disc at various slide-roll ratios. A paraffin base mineral oil was used as a lubricant and friction coefficients and film thicknesses were measured. It was found that for slide-roll ratios with the disk moving faster anomalous elastohydrodynamic lubrication (EHL) films were obtained characterized by a "dimple" in the central region of the contact. Numerical thermal-elastohydrodynamic analyses were carried out to simulate both film thickness and friction corresponding to the experimental conditions using Newtonian and Ree-Eyring Theological models. Initial results from this study suggest that neither of these lubricant models predict the correct detailed film shape and the experimental friction at the same time. An alternative lubricant model including both thermal and limiting shear stress effects (wall slippage) is currently under development.
机译：本文提出了一种非常规润滑接触的实验和数值研究，其中出现了异常的薄膜形状。实验涉及钢球与玻璃圆盘的平面在各种滑动比下的接触。使用石蜡基础矿物油作为润滑剂，并测量了摩擦系数和膜厚度。已经发现，对于具有盘移动的更快的滑动比，获得了异常的弹性流体动力润滑（EHL）膜，其特征在于在接触的中心区域中的“凹痕”。进行了数值热弹流体动力学分析，以使用牛顿模型和Ree-Eyring神学模型来模拟与实验条件相对应的薄膜厚度和摩擦。这项研究的初步结果表明，这些润滑剂模型均无法同时预测正确的详细薄膜形状和实验摩擦力。目前正在开发包括热剪切应力效应和极限剪切应力效应（壁滑移）在内的替代润滑剂模型。

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