Characteristic analysis of mechanical thermal coupling model for bearing rotor system of high-speed train

Yongqiang LIU, Baosen WANG, Shaopu YANG, Yingying LIAO, Tao GUO

doi:10.1007/s10483-022-2893-5

Applied Mathematics and Mechanics >

2022 , Vol. 43 >Issue 9: 1381 - 1398

DOI: https://doi.org/10.1007/s10483-022-2893-5

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Characteristic analysis of mechanical thermal coupling model for bearing rotor system of high-speed train

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1. School of Mechanical Engineering, Shijiazhuang Tiedao University, Shijiazhuang 050043, China;
2. School of Traffic and Transportation, Shijiazhuang Tiedao University, Shijiazhuang 050043, China;
3. State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures, Shijiazhuang Tiedao University, Shijiazhuang 050043, China;
4. School of Civil Engineering, Shijiazhuang Tiedao University, Shijiazhuang 050043, China;
5. Tangshan Locomotive and Rolling Stock Co., Ltd., China Railway Rolling Stock Corporation, Tangshan 064000, Hebei Province, China

Received date: 2022-04-18

Revised date: 2022-06-07

Online published: 2022-08-31

Supported by

the National Key R&D Program of China (No. 2020YFB2007700), the National Natural Science Foundation of China (Nos. 11790282, 12032017, 12002221, and 11872256), the S&T Program of Hebei Province of China (No. 20310803D), and the Natural Science Foundation of Hebei Province of China (No. A2020210028)

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Abstract

Based on Newton's second law and the thermal network method, a mechanical thermal coupling model of the bearing rotor system of high-speed trains is established to study the interaction between the bearing vibration and temperature. The influence of lubrication on the vibration and temperature characteristics of the system is considered in the model, and the real-time relationship between them is built up by using the transient temperature field model. After considering the lubrication, the bearing outer ring vibration acceleration and node temperature considering grease are lower, which shows the necessity of adding the lubrication model. The corresponding experiments for characteristics of vibration and temperature of the model are respectively conducted. In the envelope spectrum obtained from the simulation signal and the experimental signal, the frequency values corresponding to the peaks are close to the theoretical calculation results, and the error is very small. In the three stages of the temperature characteristic experiment, the node temperature change of the simulation model is consistent with the experiment. The good agreement between simulation and experiments proves the effectiveness of the model. By studying the influence of the bearing angular and fault size on the system node temperature, as well as the change law of bearing lubrication characteristics and temperature, it is found that the worse the working condition is, the higher the temperature is. When the ambient temperature is low, the viscosity of grease increases, and the oil film becomes thicker, which increases the sliding probability of the rolling element, thus affecting the normal operation of the bearing, which explains the phenomenon of frequent bearing faults of high-speed trains in the low-temperature area of Northeast China. Further analysis shows that faults often occur in the early stage of train operation in the low-temperature environment.

Key words： high-speed train; coupling dynamic model; thermal network method; track irregularity (TI); low temperature

Cite this article

Yongqiang LIU, Baosen WANG, Shaopu YANG, Yingying LIAO, Tao GUO . Characteristic analysis of mechanical thermal coupling model for bearing rotor system of high-speed train[J]. Applied Mathematics and Mechanics, 2022 , 43(9) : 1381 -1398 . DOI: 10.1007/s10483-022-2893-5

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