Influence on Journal Bearing Considering Wall-Slip in EHL

2018 5th International Conference on Advanced Composite Materials and Manufacturing Engineering

Zhou, Yabo^1 ; Wang, Youqiang^1 ; Zhao, Jingjing^1

School of Mechanical Engineering, Qingdao University of Technology, Qingdao, China^1

关键词: Contact interface;    Friction coefficients;    Limiting shear stress;    Limiting values;    Lubrication state;    Oil film thickness;    Pressure profiles;    Sliding regions;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/394/4/042042/pdf
DOI  :  10.1088/1757-899X/394/4/042042

来源: IOP

【 摘 要 】

Based on the line contact Elastohydrodynamic model and the limiting shear stress model of the journal bearing, the limiting shear stress at the contact interface of bearing, shaft and lubricant is discussed. And the effects of limiting shear stress on the film thickness, the pressure profile and friction coefficient are analyzed. The effect of wall-slip on elastohydrodynamic lubrication of journal bearings is discussed when the shear stress at the interface of solids and liquids reaches its limiting value. The results show that different wall-slip types will produce different lubrication states and the wall-slip of shaft interface will increase the oil film thickness in the sliding region. On the contrary, the wall-slip of the bearing interface will decrease the oil film thickness. The friction coefficient will decrease when the wall-slip occurs and the degree is greater at the interface of shaft than bearing.