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The effect of round corner on lubrication of high speed cylindrical roller bearings considering skidding

Wei Cao (School of Aeronautics and Astronautics, Sichuan University, Chengdu, China)
Jiaxu Wang (School of Aeronautics and Astronautics, Sichuan University, Chengdu, China and Research Center of Electromechanical Transmission and Delivery Equipment, Chongqing University, Chongqing, China)
Wei Pu (School of Aeronautics and Astronautics, Sichuan University, Chengdu, China)
Ying Zhang (School of Manufacturing Science and Engineering, Sichuan University, Chengdu, China)
Jiqiang Wu (School of Aeronautics and Astronautics, Sichuan University, Chengdu, China)
Si Ren (School of Aeronautics and Astronautics, Sichuan University, Chengdu, China)
Jianbing Long (Guizhou Qunjian Precision Machinery Co., Ltd, Zunyi, China)

Industrial Lubrication and Tribology

ISSN: 0036-8792

Article publication date: 13 November 2017

263

Abstract

Purpose

Previous studies were mainly focused on profile designation of bearing rollers and lubrication performance without considering roller-races skidding. However, the width of round corner, load, rotational speed and some other parameters have significant effects on the roller-races sliding speed. This paper aims to investigate the effect of round corner on lubricating characteristics between the heavily loaded roller and inner race considering skidding and roughness.

Design/methodology/approach

A mixed elastohydrodynamic lubrication (EHL) model which is capable of handling practical cases with 3D machined roughness is combined with the skidding model to investigate the effect of round corner on lubricating characteristics between the heavily loaded roller and inner race.

Findings

The width of round corner and round corner radius have a desirable range under certain operating condition, within which the maximum pressure, stress and maximum flash temperature remain low. The optimized range is sensitive to the operating condition. Roughness and skidding narrow the optimized range of round corner radius. Roughness increases the pressure peak, Mises stress and friction coefficient. At the same time, skidding and roughness have obvious effects on film thickness at the contact center area if the round radius is small.

Research limitations/implications

This paper uses the Harris skidding model that has a relatively bigger error, which is not accurate if the bearing load is less.

Practical implications

This paper unifies the skidding model and mixed EHL model which can be used as a tool for optimization design and lubricating performance analysis of cylindrical roller bearing.

Originality/value

Lubrication analyses for roller bearing are assumed to be pure rolling contact between roller and races in a previous study, which could not reflect the real contact characteristics. The skidding model is merged into a mixed EHL model which can be used as a dynamic tool to analyze the lubricating performance considering the round corner, skidding and roughness.

Keywords

Acknowledgements

Funding: This study was supported by the National Science Foundation of China under Contract No. 51435001, 51375506.

Citation

Cao, W., Wang, J., Pu, W., Zhang, Y., Wu, J., Ren, S. and Long, J. (2017), "The effect of round corner on lubrication of high speed cylindrical roller bearings considering skidding", Industrial Lubrication and Tribology, Vol. 69 No. 6, pp. 833-843. https://doi.org/10.1108/ILT-03-2016-0055

Publisher

:

Emerald Publishing Limited

Copyright © 2017, Emerald Publishing Limited

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