牵引齿轮传动比对电机轴承温升和换热的影响  

The Effect of Traction Gear Ratio on Temperature Rise and Heat Transfer for Motor Bearing

作　　者：刘军强 LIU Junqiang(Daban Locomotive Depot,China Railway Hohhot Group Co.,Ltd.,Chifeng 025150 Inner Mongolia,China)

机构地区：[1]中国铁路呼和浩特局集团有限公司大板机务段,内蒙古赤峰025150

出　　处：《铁道机车车辆》2022年第6期66-71,共6页Railway Locomotive & Car

摘　　要：该研究分别针对传动比为2.6、3.0、4.5的DF_(4D)型客运(货转客)机车,综合分析了同一区段、同一客运车次的机车走行部车载装置监测温度、柴油机转数、柴油机输出功率、机车速度等相关数据。为降低运行中热惯性对采集数据的影响,将上述采集数据转化为时均值,计算了上述3类传动比对应的机车速度、牵引电机输入功率、轴承温升时均值。结果表明,当机车速度为81.5 km/h、柴油机转速为800 r/min、牵引电机单台通风机通风量为4.5 m^(3)/s时,牵引齿轮传动比从2.6变为4.5,输出端轴承黏性耗散引发的温升提高4.8℃,黏性耗散热量增加了2倍,电机转子转速升高,强化了轴承与冷却空气的换热,对流换热强度提高1.78倍。In this study,for DF_(4D) passenger locomotives(freight locomotive transformed passenger locomotive)with transmission ratios of 2.6,3.0 and 4.5,the monitoring temperature,diesel engine revolution,diesel output power,locomotive speed and other relevant data of locomotive running gear in the same section and the same passenger train number are comprehensively analyzed.In order to reduce the influence of thermal inertia on the collected data during operation,the time-average values of the collected data were converted and the average values of locomotive speed,traction motor input power and bearing temperature rise corresponding to the above three types of transmission ratios were calculated.Results show that when the locomotive speed is 81.5 km/h,the diesel engine rotating speed of 800 r/min,traction motor single fan ventilation rate is 4.5 m3/s,the traction gear ratio from 2.6 to 4.5,the output end bearing viscous dissipation caused by temperature increased by 4.8℃,viscous dissipation heat tripled,motor rotor speed increases,strengthened the bearing of the heat transfer and cooling air,convective heat transfer intensity increased by 1.78 times.

关 键 词：DF_(4D)型机车 牵引电机 齿轮传动比 轴承温升 热平衡 对流换热 

分 类 号：U262.46[机械工程—车辆工程]