高速列车轴箱轴承动力学行为及温度分析
耿自林1,宋冬利*,1,张卫华1,谢名源2
(1.西南交通大学 牵引动力国家重点实验室,四川 成都 610031;2.上海铁路局 高铁运维技术中心,上海 201812)
摘要:为探究高速动车组运行过程中轴箱轴承的动力学响应和轴箱内部温度分布,以某型高速动车组为例,建立了车辆轨道耦合动力学模型及双列圆锥滚子动力学模型。通过车辆动力学模型分析了实测轨道谱激励下轴箱轴承的受载情况和振动工况,并以此作为输入分析轴承动力行为,基于摩擦生热理论计算了轴承内各接触部位的摩擦功耗。在热源计算的基础上建立了轴箱单元的热网格模型以求解轴箱内部各节点的温度分布。研究结果表明,车轮多边形会使轴箱轴承保持架质心运动变得杂乱且伴随着很强的冲击,滚动体与内外圈的接触应力也随之增大。轴箱内部温度最高部位为滚动体和内圈挡边接触区,车轮多边形化对轴箱轴承温升几乎无影响,但对轴承保持架冲击较大,会影响轴箱轴承的使用寿命。轴承的外圈故障会使轴承温度显著升高,而内圈故障对轴承温升的影响则相对较小。
关键词:轴承动力学、热源计算、轴箱轴承、热网格法、温度分布
中图分类号:U238 文献标志码:A doi:10.3969/j.issn.1006-0316.2020.11.009
文章编号:1006-0316 (2020) 11-0054-09
Dynamic and Temperature Analysis of Axle Box Bearing of High-speed Train
GENG Zilin1,SONG Dongli1,ZHANG Weihua1,XIE Mingyuan2
( 1.State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, China; 2.Operation and Maintenance of High-speed Railway Technical Center, Shanghai Railway Bureau, Shanghai 201812, China )
Abstract:A vehicle-track coupled dynamics model and a double-row tapered roller bearing dynamics model of a certain type of high speed EMU is built to study the dynamic behavior and internal temperature distribution of the axle box bearing. Forces applied to the axle box and the vibration condition of the bearing is analyzed according to the vehicle dynamic model under measured track spectrum excitation, which is chosen as the input of bearing dynamic analysis. And the friction loss is calculated based on theory of friction heat generation. And then the internal temperature distribution of the axle box is obtained through a thermal network model. The results show that wheel polygonalization makes the mass center movement of the cage disordered and accompanied by strong impact, and the contact pressure between the rollers and raceways increases as well. And it is found that the highest temperature is recorded at the contact region between the rollers and inner rib. And wheel polygonalization hardly has any effect on temperature rising of the axle box bearing, while it brings great impact to the cage, which will no doubt shorten the bearing's useful life. Outer raceway fault increases bearing temperature significantly while inner raceway fault has a relatively smaller effect on it.
Key words:bearing dynamics;heat generation;axle box bearing;thermal network method;temperature distribution
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收稿日期:2020-04-02
基金项目:中国铁路总公司“动车组PHM总体技术研究”课题(K2018J018)
作者简介:耿自林(1992-),男,湖北黄冈人,硕士研究生,主要研究方向为车辆系统动力学;通讯作者:宋冬利(1971-),女,贵州铜仁人,硕士导师,主要研究方向为动车组健康管理(PHM),E-mail:sdl.cds@163.com。
 

 

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