润滑油粘度对缸套/活塞环摩擦学性能的影响  

Effect of Lubricant Oil Viscosity on Tribological Behavior of Cylinder Liner/Piston Ring

作　　者：熊春华[1,2] 王成彪[2] 赵巍[1] 徐金龙[1] 

机构地区：[1]中国人民解放军总后勤部油料研究所,北京102300 [2]中国地质大学地质工程学院,北京100083

出　　处：《机械工程师》2011年第6期9-11,共3页Mechanical Engineer

摘　　要：在内燃机实际运行中,润滑油的粘度直接影响到润滑油膜的状态,因而活塞环在缸套中不同位置时的摩擦、润滑状态各不相同。文中以缸套活塞环为研究对象,建立了润滑计算模型,并运用该模型对缸内压力、温度、油膜厚度和摩擦系数进行了分析。结果表明,润滑油膜厚度和摩擦系数随转速改变而发生变化,而剪切稀化导致润滑油粘度减小是引起该变化的主要原因。最后,通过对计算结果的分析,提出了适用于缸套活塞环的润滑油粘度指标。Since the viscosity of lubricant oil directly affects the state of oil film during engine operation,the state of lubrication and friction for the piston ring is variable in different positions.Based on cylinder liner/piston ring as the research object,the lubrication calculation model was established,and the pressure,temperature,oil film thickness and friction coefficient in cylinder liner were analyzed by using this model.The results showed that the oil film thickness and friction coefficient changed with the variation of rotate speed,and the main reason to cause this change was that the shear thinning resulted in the decrease of viscosity of lubricant oil.Finally,through analysis of calculations,viscosity of lubricant oil that was suitable for cylinder liner / piston ring was proposed.

关 键 词：缸套/活塞环 润滑油 粘度 油膜厚度 摩擦系数 

分 类 号：TK428.9[动力工程及工程热物理—动力机械及工程]