摘要
甲醇发动机在运行过程中易发生甲醇稀释现象,严重影响缸套-活塞环摩擦副的润滑性能。以某改装甲醇发动机为研究对象,基于平均雷诺方程构建了织构化缸套-活塞环摩擦副的数值润滑模型。利用MATLAB软件对模型进行求解,通过调整凹坑织构参数,分析了其对润滑稀释条件下缸套-活塞环摩擦副润滑性能的影响。研究结果表明:甲醇稀释会导致润滑油黏度发生变化,破坏摩擦副的油膜生成能力,进而劣化润滑环境,而在活塞环表面设计合理的表面织构可以有效缓解这种负面影响,在特定织构参数下,如凹坑半径为100μm和凹坑深度为5μm时,润滑油平均流体摩擦力最小。
Methanol engines are susceptible to methanol-induced dilution phenomenon during operation,which severely degrades the lubrication performance of the cylinder liner-piston ring friction pair.Taking a modified methanol engine as the research object,a numerical lubrication model for the textured cylinder liner-piston ring friction pair was established based on the average Reynolds equation.The model was solved using MATLAB software.By adjusting the dimple texture parameters,its influence on the lubrication performance of the friction pair was analyzed under diluted lubrication conditions.The research results indicate that methanol dilution changes lubricant viscosity,impairs the oil film formation capability of the friction pair and consequently deteriorates the lubrication environment.However,incorporating appropriate surface textures on the piston ring surface can effectively mitigate this adverse effect.Under specific texture parameters such as a dimple radius of 100μm and a dimple depth of 5μm,the smallest average hydrodynamic friction force of the lubricant can be achieved.
作者
李直
赵雨鹏
陈岩
张喜清
张宏
LI Zhi;ZHAO Yupeng;CHEN Yan;ZHANG Xiqing;ZHANG Hong(School of Vehicle and Transportation Engineering,Taiyuan University of Science and Technology,Taiyuan 030024,China;School of Mechanical Engineering,Taiyuan University of Science and Technology,Taiyuan 030024,China)
出处
《车用发动机》
北大核心
2025年第3期60-67,共8页
Vehicle Engine
基金
国家自然科学基金资助项目(52075355)。
关键词
甲醇发动机
缸套
活塞环
润滑油
稀释
表面织构
润滑特性
methanol engine
cylinder liner
piston ring
lubricating oil
dilution
surface texture
lubrication characteristic
