极限环境温度对柴油机气缸套磨损的影响  

Impacts of extreme environmental temperature on diesel engine cylinder-liner wear

作　　者：和穆[1] 王宪成[1] 杨莹[1] 王云峰[2] 

机构地区：[1]装甲兵工程学院机械工程系,北京100072 [2]武警北京指挥学院教研部,北京100012

出　　处：《中国工程机械学报》2012年第2期211-215,共5页Chinese Journal of Construction Machinery

基　　金：军队科研计划资助项目

摘　　要：为了研究不同环境温度对柴油机寿命的影响,以某型柴油机为对象,通过模拟极限环境温度下柴油机实际工况,利用受力分析和热平衡计算得到边界条件,基于雷诺方程和改进的Holm-Achard黏着磨损公式建立润滑磨损数值计算模型.经验证上止点附近模型的计算值与实测值误差不超过5%.计算表明,油膜厚度随外界温度升高而逐渐变薄.高温319K时气缸套径向最大磨损深度为41.21μm,低温230 K时为35.8μm.To study the impacts of different environmental temperatures on diesel engine lifecycle, the actual working conditions under extreme environmental temperature are initially simulated for a specific diesel engine. By applying loading analysis and thermal balancing calculation, the boundary conditions are subsequently obtained. Based on the Reynolds equation and improved Holm-Achard sticking wear formula, a lubricating wear calculation model is established. Consequently, the errors between the calculated upper-limit and measured values are lower than 5 %. More specifically, the oil-membrane thickness decreases with increased environmental temperatures,e. g., the high environmental temperature of 319 K results in the maximum cylinder radial wear depth of 42.21 μm, whilst the low environmental temperature of 230 K leads to that of 35.8 μm.

关 键 词：极限温度 活塞环-气缸套 润滑 磨损 

分 类 号：TK421[动力工程及工程热物理—动力机械及工程]