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Civil-Comp Proceedings
ISSN 1759-3433
CCP: 104
PROCEEDINGS OF THE SECOND INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE
Edited by: J. Pombo
Paper 235

Manufacturing Geometry of Bearings and its Dynamic Effect on Reliability of Railway Bearings

W. Chang1,2, L.L. Guo1,5, H. Xi1, X. Zhang1, H.Y. Wang4, S.N. Xu3, L.C. Zeng2, H. Xu1 and F.C. Wang1,2,3

1iBT Group, School of Mechanical Engineering, Xi'an Jiaotong University, China
2Railway & Tribology Centre, School of Mechanical Engineering, Wuhan University of Science & Technology, China
3Dynamic Testing Department, National Centre of Bearing Technology, China
4Bradford Grammar School, United Kingdom
5Institute of Bearing Technology, United Manufacturing Groups (UMG), Yinchuan, China

Full Bibliographic Reference for this paper
W. Chang, L.L. Guo, H. Xi, X. Zhang, H.Y. Wang, S.N. Xu, L.C. Zeng, H. Xu, F.C. Wang, "Manufacturing Geometry of Bearings and its Dynamic Effect on Reliability of Railway Bearings", in J. Pombo, (Editor), "Proceedings of the Second International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Stirlingshire, UK, Paper 235, 2014. doi:10.4203/ccp.104.235
Keywords: railroad car, axle roller bearings, waviness, vibration acceleration, finite element method, contact stress, service life, life factor, reliability.

Summary
The internal contact and vibration of railway bearings under the operating condition due to bearing geometry precision, such as the ring waviness in manufacturing, was analysed. A vibration model of axle bearings due to the different waviness features and the dynamic load under the operating condition was developed. Subsequently, the dynamic contact stress distribution of bearings due to manufacturing geometry was evaluated by the finite element model for the study of axle bearing assembly with the given dynamic contact load. Additionally, the dynamic load and the contact stress distribution on bearings was employed to estimate the service life of axle bearings. It was seen that both the dynamic load of rollers against ring and ring waviness could play a significant role in improving the reliability and the service life of axle bearings. It should be pointed out that the present work in this study was helpful to understand the tribological mechanism and identify the relevant technology of bearing design and manufacturing, as well as its application to railway.

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