载荷对重型车辆发动机活塞环-缸套摩擦学性能的影响  

Influence of Loads on Tribological Property of Heavy Vechicle Engine Piston Ring-cylinder Liner

作　　者：李奇[1] 王宪成[1] 蔡志海[2] 底月兰[2] 何星[1] 

机构地区：[1]装甲兵工程学院机械工程系,北京100072 [2]装甲兵工程学院装备再制造工程系,北京100072

出　　处：《材料工程》2014年第6期56-61,共6页Journal of Materials Engineering

基　　金：国家自然科学基金项目(50901089)

摘　　要：利用SRV实验机模拟重型车辆发动机活塞环-缸套摩擦副的工作状态,测试了静载荷和动载荷条件下摩擦副的摩擦学性能。采用扫描电镜、能谱仪分析了磨痕形貌和化学成分,研究了摩擦副的磨损机制。结果表明:随静载荷的增加,摩擦副的摩擦因数减小,总失重量增加。摩擦副的磨损机理以磨粒磨损为主,在400N条件下活塞环的磨损机理为综合的磨粒磨损和黏着磨损。在低强度和中等强度动载荷条件下,摩擦副的摩擦因数随载荷的变化而呈循环变化,磨损机理以磨粒磨损为主。在高强度动载荷条件下,摩擦副的摩擦因数保持稳定,活塞环的磨损机理是综合的磨粒磨损、黏着磨损、疲劳磨损,缸套的磨损机理是综合的磨粒磨损、黏着磨损。摩擦副的总失重量随动载荷强度的增大而增加。Working conditions of piston ring-cylinder liner mate were simulated by SRV test rig.Friction coefficient and mass loss of mate under different static loads and vibration loads were tested.SEM-EDS were used to analyze wear marks and chemical composition.Wear mechanisms of piston rings-cylinder liners were researched.The results show that friction coefficient of mate decreases and mass loss increases with static load increasing.The main wear mechanism of mate is abrasive wear.The mechanism changes to abrasive wear and adhesion wear under 400N.Friction coefficient of mate appears cyclic change when loads alternate under low and moderate strength.The main wear mechanism of mate is abrasive wear.Friction coefficient of mate keeps stable under high strength.The wear mechanism of piston rings is comprehensive abrasive,adhesion and fatigue wear.The wear mechanism of cylinder liner is comprehensive abrasive,adhesion wear.Mass loss increases with strength of vibration load increasing.

关 键 词：活塞环-缸套 动载荷 静载荷 磨损机理 

分 类 号：TG115.58[金属学及工艺—物理冶金]