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Establishment of the thermo-mechanical coupling model of axle box bearings with track irregularity excitation and analysis of its temperature characteristics

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Applied Mathematics and Mechanics(English Edition) 2024年第11期45卷 1965-1986页

作者： Min WANG Shaopu YANG Yongqiang LIU Yanhong CHEN Kai ZHANG State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures Shijiazhuang Tiedao UniversityShijiazhuang050043China School of Traffic and Transportation Shijiazhuang Tiedao UniversityShijiazhuang050043China School of Mechanical Engineering Shijiazhuang Tiedao UniversityShijiazhuang050043China CRRC Tangshan Co. Ltd.Tangshan063000Hebei ProvinceChina China Water Resources Beifang Investigation Designand Research Co.Ltd.Tianjin300222China

As an important component of the running gear of high-speed trains,axle box bearings can cause lubricating grease failure and damage to bearing components under continuous high-temperature operation,which will affect the normal operation of highspeed ***,bearing temperature is one of the key parameters to be monitored in the online monitoring system for *** on the thermal network method,this paper establishes a thermal network model for the axle box bearing,considering the radial thermal deformation of the double-row tapered roller bearing components caused by the oil film characteristics and the temperature variations of the lubricating grease.A thermo-mechanical coupling model for the grease-lubricated double-row tapered roller axle box bearing of high-speed trains with track irregularity excitation is *** correctness of the model is verified using the test bench data,and the temperature of the bearing at different rotational speeds,loads,fault sizes,and ambient temperatures are investigated.

关键词： axle box bearing thermal network method temperature rotational speed

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Analysis of the Temperature Characteristics of High-speed Train bearings Based on a Dynamics Model and Thermal Network Method

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Chinese Journal of Mechanical Engineering 2022年第5期35卷 351-363页

作者： Baosen Wang Yongqiang Liu Bin Zhang Wenqing Huai School of Traffic and Transportation Shijiazhuang Tiedao UniversityShijiazhuang 050043China School of Mechanical Engineering Shijiazhuang Tiedao UniversityShijiazhuang 050043China Department of Electrical Engineering University of South CarolinaColumbia 29201USA Taiyuan Vehicle Depot of Daqin Railway Co. Ltd.Taiyuan 030000China

High-speed trains often use temperature sensors to monitor the motion state of ***,the temperature of bearings can be affected by factors such as weather and ***,it is necessary to analyze in detail the relationship between the bearing temperature and influencing *** this study,a dynamics model of the axle box bearing of high-speed trains is *** model can obtain the contact force between the rollers and raceway and its change law when the bearing contains outer-ring,inner-ring,and rolling-element *** on the model,a thermal network method is introduced to study the temperature field distribution of the axle box bearings of high-speed *** this model,the heat generation,conduction,and dispersion of the isothermal nodes can be *** results show that the temperature of the contact point between the outer-ring raceway and rolling-elements is the *** relationships between the node temperature and the speed,fault type,and fault size are analyzed,finding that the higher the speed,the higher the node *** different fault types,the node temperature first increases and then decreases as the fault size *** effectiveness of the model is demonstrated using the actual temperature data of a high-speed *** study proposes a thermal network model that can predict the temperature of each component of the bearings on a high-speed train under various speed and fault conditions.

关键词： High-speed train axle box bearing Temperature characteristics Thermal network method

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