The Open Mechanical Engineering Journal

2015, 9 : 156-159
Published online 2015 February 27. DOI: 10.2174/1874155X01509010156
Publisher ID: TOMEJ-9-156

Film Stiffness Analysis for Angular Contact Ball Bearings Considering Thermal Effect

Chun L. Lei , Zhi Y. Rui , Qin Wu , Jun F. Guo and Li N. Ren
Key Laboratory of Digital Manufacturing Technology and Application, The Ministry of Education, Lanzhou University of Technology, 287 Langongping Road, Qi Li He, Lanzhou, Postcard: 730050, China.

ABSTRACT

In order to more accurately calculate the film stiffness of angular contact ball bearing, it is necessary to establish the film stiffness calculation model that is consistent with reality. The frictional heat exists in high-speed ball bearings, and can impact on oil film thickness and stiffness. The calculation model of film stiffness of an angular contact ball bearing taking account of the effects of viscous heating was proposed based on the elastohydrodynamic lubrication theory. The central film thickness and film stiffness have been determined. An example was calculated with this derived equation and the result was compared with that given in other literatures. The calculation results show that the central film thickness decreases and the film stiffness increases when friction heating are considered.

Keywords:

Ball bearing, Elastohydrodynamic lubrication, Film stiffness, Heat effects.