机车轴箱轴承温升和对流换热特性研究  

Research on characteristics of temperature rise and convective heat transfer for locomotive axle box bearings

作　　者：刘军强 LIU Junqiang(Daban Locomotive Depot,Chifeng 025150,China)

机构地区：[1]大板机务段,内蒙古赤峰025150

出　　处：《铁道机车与动车》2021年第9期12-16,I0001,共6页Railway Locomotive and Motor Car

基　　金：中国铁路呼和浩特局集团有限公司科技研究开发计划项目(2021D002)。

摘　　要：机车轴箱轴承温升由热源和散热两方面决定,其温升与机车速度密切相关。应用集总参数法建立了轴箱轴承温升模型,并将模型计算结果与实测温升数据进行了对比分析。实测温升数据是同一时刻12个测点数据的均值。温升模型中对流换热系数h与机车速度v关联式选取了两种计算方法。结果表明,机车速度较为稳定时,第一种计算结果较实测数据偏高;第二种较实测数据偏低。The temperature rise of the axle box bearing in a locomotive is determined by two aspects of heat source and heat dissipation,and the temperature rise is closely related to the locomotive speed. The lumped parameter method is used to establish the axle box bearing temperature rise model, and the calculation results of the model are compared with the measured temperature rise data. The measured temperature rise data are the average values of the 12 measuring points at the same time. In the temperature rise model,two calculation methods are selected for the correlation between the convective heat transfer coefficient and the locomotive speed. The results show that when the locomotive speed is relatively stable,the first calculation result is higher than the measured data;the second calculation result is lower than the measured data.

关 键 词：DF4D型机车 轴箱轴承 轴温 轴承温升 热平衡 对流换热 

分 类 号：U260.331.1[机械工程—车辆工程]