考虑时变效应的织构缸套润滑性能分析及试验研究  

Analysis and Experimental Research on Lubrication Performance of Textured Cylinder Liners Considering Time-dependent Effects

作　　者：王林森 王海霞 纪敬虎[2] 尤凤翔 刘庆升 王槐生 李东亚[1] WANG Linsen;WANG Haixia;JI Jinghu;YOU Fengxiang;LIU Qingsheng;WANG Huaisheng;LI Dongya(School of Engineering,Applied Technology College of Soochow University,Suzhou Jiangsu 215325,China;School of Mechanical Engineering,Jiangsu University,Zhenjiang Jiangsu 212013,China;School of Mechanical and Electrical Engineering,Soochow University,Suzhou Jiangsu 215021,China)

机构地区：[1]苏州大学应用技术学院工学院,江苏苏州215325 [2]江苏大学机械工程学院,江苏镇江212013 [3]苏州大学机电工程学院,江苏苏州215021

出　　处：《润滑与密封》2024年第5期71-77,共7页Lubrication Engineering

基　　金：江苏省自然科学基金项目(BK20220500);江苏省自然科学基金面上项目(BK20201201);苏州大学应用技术学院第四批教学改革研究项目(JG202311)。

摘　　要：内燃机缸孔内的时变效应和气压变化对活塞环受力影响不可忽略,而织构形貌参数对发动机油耗性能的影响也有待深入研究。为此,构建考虑时变效应和缸内气体压力变化的织构化缸套-活塞环摩擦副的流体动压润滑模型,采用多重网格法求解模型获得润滑油膜压力分布规律,进而获得缸套-活塞环间的最小油膜厚度和摩擦力,并针对装配织构缸套的发动机开展台架试验。计算结果表明:缸内气体压力变化影响活塞环径向受力,时变效应使缸套-活塞环受挤压效应的影响;织构化缸套能够增加润滑油膜厚度、减少摩擦力,当微凹坑深度为4~7μm,织构面积密度较小如为5%、10%时,能够获得较佳的最小油膜厚度与摩擦力值。台架试验表明,与原发动机相比,装配织构缸套的发动机油耗性能明显改善,在中高转速下燃油耗降幅较为显著,油耗最大下降14.5%,而24 h机油耗减少26.48%。The time-dependent effect and pressure changes in combustion chamber cannot be ignored,and the influence of texture morphology parameters on engine fuel consumption performance also needs further research.The hydrodynamic lubrication model of cylinder liner-piston ring with micro-pits texture was established.The multigrid method was used to solve the model to obtain the distribution law of lubrication oil film pressure,and then the minimum oil film thickness and the friction force between the cylinder liner-piston ring were obtained.Bench test was conducted on the engines with tex-tured cylinder liners.The calculation results show that the change of gas pressure affects the radial force of the piston ring,and the extrusion effect affects the cylinder liner-piston ring under the time-varying effects.Textured cylinder liners can increase lubricant film thickness and reduce friction force.When the depth of micro-pits is from 4μm to 7μm and the tex-ture area density is small,such as 5%or 10%,the optimal minimum oil film thickness and friction force value can be achieved.By the engine bench test,it is found that compared with the original engine,the oil consumption of the engine with textured cylinder liner shows a declining trend.The reduction in fuel consumption is more significant at medium and high speeds,with a maximum reduction of 14.5%in fuel consumption and a 26.48%reduction in 24-hour engine oil consumption.

关 键 词：表面织构 缸套-活塞环 润滑性能 台架试验 油耗 

分 类 号：TH117[机械工程—机械设计及理论]