Effect of unbalanced magnetic pull on the thermal characteristics of traction motor bearing
Industrial Lubrication and Tribology
ISSN: 0036-8792
Article publication date: 22 September 2021
Issue publication date: 7 December 2021
Abstract
Purpose
The purpose of this paper is to analyze the unbalanced magnetic pull (UMP) of the rotor of traction motor and the influence of the UMP on thermal characteristics of traction motor bearing.
Design/methodology/approach
The unbalanced magnetic pull on the rotor with different eccentricity was calculated by Fourier series expansion method. A bearing thermal analysis finite element model considering both the vibration of high-speed train caused by track irregularity and the UMP of traction motor rotor was established. The validity of the model is verified by experimental data obtained from a service high-speed train.
Findings
The results show that thermal failure of bearing subassemblies most likely occurs at contact area between the inner ring and rollers. The UMP of rotor of traction motor has a significant effect on the temperature of the inner ring and roller of the bearing. When the eccentricity is 10%, the temperature can even be increased by about 12°C. Therefore, the UMP of rotor of traction motor must be considered in thermal analysis of traction motor bearing.
Originality/value
In the thermal analysis of the bearing of the traction motor of high-speed train, the UMP of the rotor of the traction motor is considered for the first time
Keywords
Acknowledgements
This research was sponsored by the Research Found of the State Key Laboratory of Rail Transit Engineering Informatization (FSDI) [Grant No. SKLK2018-09], the National Natural Science Foundation of China (Grant No. 51808462), the Applied Basic Research Project of Sichuan Science and Technology Department (Free Exploration Type) (Grant No. 20YYJC3288) and the China Postdoctoral Science Foundation (Grant No. 2018M643520). These supports are gratefully acknowledged. The results and opinions presented are those of the authors and do not necessarily reflect those of the sponsoring agencies.
Citation
Wang, T., Song, D., Zhang, W., Jiang, S. and Wang, Z. (2021), "Effect of unbalanced magnetic pull on the thermal characteristics of traction motor bearing", Industrial Lubrication and Tribology, Vol. 73 No. 9, pp. 1187-1197. https://doi.org/10.1108/ILT-05-2021-0180
Publisher
:Emerald Publishing Limited
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