Effect of track irregularities of high-speed railways on the thermal characteristics of the traction motor bearing

方位(导航) 振动 运动学 汽车工程 转速 润滑 火车 牵引电动机 热的 牵引(地质) 磁道(磁盘驱动器) 机械工程 球(数学) 结构工程 工程类 计算机科学 声学 物理 地图学 数学 经典力学 人工智能 气象学 地理 数学分析
作者
Tingting Wang,Zhiwei Wang,Dongli Song,Weihua Zhang,Jiayuan Li,Chen De
出处
期刊:Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit [SAGE Publishing]
卷期号:235 (1): 22-34 被引量:19
标识
DOI:10.1177/0954409720902359
摘要

The operating temperature plays a key role in the service reliability of ball bearings used in the traction motor of high-speed trains. Studies on the heat generation and temperature distributions of the bearing under the vehicle vibration environment are critical for designing the high-speed train traction motor bearing and to monitor its operation. In this paper, an SKF friction torque model that considers the inlet shear heating reduction and kinematic replenishment/starvation reduction was used to calculate the power loss of the bearing operating in a high-speed train. A thermal analysis model of the bearing, which takes into account the vehicle vibration due to track irregularities, was developed to study the thermal characteristics of the bearing operating in a high-speed train. Experiments were conducted on a service high-speed train (i.e. CRH380B) to validate the proposed bearing thermal analysis model. The thermal characteristics of the bearing and the influence of key factors on the operating temperature of the bearing under vehicle vibration due to track irregularities were studied with the proposed bearing thermal analysis model. The results show that the thermal failure of the bearing subassemblies most likely occurs at the balls region owing to the highest temperature in that region, compared to the inner and outer raceway of the bearing. The method of applying grease with appropriate kinematic viscosity should be adopted to reduce the power loss of bearing while meeting the lubrication requirement. The vehicle vibration due to track irregularities significantly influences the thermal characteristics of high-speed train motor bearings, which cannot be ignored in the thermal analysis of bearings operating in a high-speed train.
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