极寒条件下重型柴油机润滑油箱加热管路传热性能试验研究  

Experimental study on heat transfer performance of heating pipeline of heavyduty diesel engine's lubricant tank under extreme cold condition

作　　者：乔增鑫 孙晓霞[2,3] 沈丽丽 郑思宇 魏名山 QIAO Zengxin;SUN Xiaoxia;SHEN Lili;ZHENG Siyu;WEI Mingshan(School of Mechanical Engineering,Beijing Institute of Technology,Beijing 100081,China;China North Vehicle Research Institute,Beijing 100072,China;Chinese Scholar Tree Ridge State Key Laboratory,Beijing 100072,China;School of Mechanical and Electrical Engineering,China University of Mining and Technology-Beijing,Beijing 100083,China)

机构地区：[1]北京理工大学机械与车辆学院,北京100081 [2]中国北方车辆研究所,北京100072 [3]先进越野系统技术全国重点实验室,北京100072 [4]中国矿业大学(北京)机电工程学院,北京100083

出　　处：《工程设计学报》2025年第1期121-131,共11页Chinese Journal of Engineering Design

基　　金：国家国防科技工业局基础产品创新计划车用动力科研专项。

摘　　要：为了探究极寒条件下某款重型柴油机润滑油箱加热管路在预热阶段的传热性能,搭建了润滑油箱加热管路传热性能试验平台。研究了在润滑油预热过程中油箱内润滑油的温度变化规律,并调整冷却液进口温度、体积流量和润滑油初始温度等工况参数,分析不同工况对润滑油温度变化的影响。试验结果表明:当润滑油初始温度为-50℃时,其高黏度特性使得在预热过程中油箱内的温度分布十分不均匀,只有较少测温点的温度上升明显;提高冷却液进口温度和体积流量都会增大平均换热功率,特别是冷却液进口温度的提高对增大平均换热功率具有更加显著的作用;提高润滑油初始温度分别至-40、-30、-20℃,则平均换热功率呈先增大后减小的趋势,当润滑油初始温度为-40℃时,平均换热功率最大。研究结果为优化润滑油预热策略、改进润滑油箱加热管路的结构提供了参考。In order to investigate the heat transfer performance of heating pipeline of a heavy-duty diesel engine's lubricant tank during the preheating stage under extremely cold conditions,a test platform for heat transfer performance of the heating pipeline of lubricant tank was constructed.The temperature variation law of the lubricant in the tank during the preheating process was studied,the working parameters such as coolant inlet temperature,volume flow rate and lubricant initial temperature were adjusted,and the effects of different working conditions on the lubricant temperature variation were analyzed.The test results showed that when the lubricant initial temperature was-50℃,its high viscosity led to a very uneven temperature distribution inside the tank during preheating with only a few temperature measuring points showing a significant increase.Increasing the inlet temperature and volume flow rate of the coolant both increased the average heat transfer power,especially the increase of coolant inlet temperature had a more significant effect on the increase of average heat transfer power.When the lubricant initial temperature to-40,-30 and-20°C respectively,the average heat transfer power increased first and then decreased,and when the lubricant initial temperature was-40℃,the average heat transfer power was maximum.The research results provide a reference for optimizing the lubricant preheating strategy and improving the structure of heating pipeline of the lubricant tank.

关 键 词：极寒条件 冷起动 润滑油预热 黏度 

分 类 号：TK427[动力工程及工程热物理—动力机械及工程]