流体润滑条件下复合润滑织构改善缸套表面摩擦性能  

Improvement of friction performance of cylinder liner surface with composite lubrication texture under fluid lubrication condition

作　　者：樊玉杰[1] 郝梦杰 陈俣哲 夏晶 李彬 FAN Yujie;HAO Mengjie;CHEN Yuzhe;XIA Jing;LI Bin(School of Mechanical Engineering,Jiangsu University of Science and Technology,Zhenjiang,Jiangsu 212003,China)

机构地区：[1]江苏科技大学机械工程学院,江苏镇江212003

出　　处：《排灌机械工程学报》2023年第12期1290-1296,共7页Journal of Drainage and Irrigation Machinery Engineering

基　　金：国家自然科学基金资助项目(12202167)。

摘　　要：为了改善缸套表面摩擦性能,以YTRC2110D型柴油机为研究对象,在缸套流体润滑区域进行复合润滑结构设计.基于摩擦试验,探讨了润滑条件下复合润滑结构改善缸套表面的摩擦性能和磨损机理,并找到性能最优的复合润滑结构.结果表明,在流体润滑条件下,复合润滑结构比单一微织构减摩性能更好.相比光滑表面,单一微织构表面平均摩擦系数下降32.86%,磨损质量最多只降低9.6%,磨损表面粗糙度Sa最高只下降了16.57%,分形维数D只上升4.67%.其表面磨损区域主要为浅犁,还伴随着少量的深犁,复合润滑结构表面平均摩擦系数可以下降42.2%,磨损质量最多减少了17.6%,磨损表面粗糙度Sa最高下降26.86%,分形维数D上升8.77%.复合润滑结构接触表面通过动压油膜和二硫化钼转移薄膜共同作用,磨损表面只产生少量浅犁.研究结果为缸套表面摩擦性能的改善提供了理论依据.In order to improve the surface friction performance of the cylinder liner,the YTRC2110D diesel engine was used as the research object,and a composite lubrication structure was designed in the fluid lubrication area of the cylinder liner.Based on friction tests,the friction performance and wear mechanism of the composite lubrication structure responsible for improving the surface of the cy-linder liner under lubrication conditions were discussed,and the composite lubrication structure with the best performance was found.The results show that under fluid lubrication conditions,the composite lubrication structure possesses better friction reduction performance than that of a single micro-texture.Compared with smooth surfaces,the average friction coefficient of a single micro-textured surface decreases by 32.86%,the wear quality only decreases by up to 9.6%,the maximum decrease in surface roughness S a is only 16.57%,and the fractal dimension D increases by only 4.67%.The surface wear area is mainly shallow plowed,accompanied by a small amount of deep plowing.The average friction coefficient of the surface of the composite lubricating structure decreases by 42.2%,the wear quality is reduced by up to 17.6%,the maximum wear surface roughness S a decreases by 26.86%,and the fractal dimension D increases by 8.77%.The contact surface of the composite lubrication structure is affected by the dynamic pressure oil film and the molybdenum disulfide transfer film,and only a small amount of shallow plowing is produced on the worn surface.This provides a theoretical basis for improving the friction performance of the cylinder liner surface.

关 键 词：缸套-活塞环 流体润滑 复合润滑结构 磨损机理 摩擦性能 

分 类 号：TH117[机械工程—机械设计及理论]