Thermal point contact EHL analysis of rolling/sliding contacts with experimental comparison showing anomalous film shapes

被引：25

作者：

Carli, M. ^{[1
,2
]}

Sharif, K. J. ^{[1
]}

Ciulli, E. ^{[2
]}

Evans, H. R. ^{[1
]}

Snidle, R. W. ^{[1
]}

机构：

[1] Cardiff Univ, Cardiff Sch Engn, Res Off, Cardiff CF2 3AA, S Glam, Wales

[2] Univ Pisa, DIMNP, I-56126 Pisa, Italy

来源：

TRIBOLOGY INTERNATIONAL | 2009年 / 42卷 / 04期

基金：

英国工程与自然科学研究理事会;

关键词：

Elastohydrodynamic lubrication; Anomalous film thickness; Friction coefficient; Thermal effects; Limiting shear stress; PART; 1; DEFLECTION;

D O I：

10.1016/j.triboint.2008.07.011

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

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. (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：517 / 525

页数：9

共 23 条

[1] RHEOLOGICAL MODEL FOR ELASTOHYDRODYNAMIC CONTACTS BASED ON PRIMARY LABORATORY DATA [J].