含不同粘度指数改进剂基础油的弹流润滑分析  

Elastohydrodynamic Lubrication Analysis of Base Oils with Different Viscosity Index Improver

作　　者：徐志方[1] 刘剑平[2] 徐兵兵[1] 

机构地区：[1]山东理工大学农业工程与食品科学学院,山东省淄博市255049 [2]山东理工大学机械工程学院,山东省淄博市255049

出　　处：《农业装备与车辆工程》2016年第3期14-17,共4页Agricultural Equipment & Vehicle Engineering

基　　金：山东省自然科学基金资助项目(ZR2011EEM008)

摘　　要：分别采用Carreau-Yasuda修正本构方程和WLF方程描述含粘度指数改进剂基础油的剪切稀化特性及粘温关系,研究了在不同工况条件下两组含不同粘度指数改进剂基础油的成膜性能变化规律。结果表明:不同粘度指数改进剂使基础油具有不同的粘温性能和剪切稀化特性。随着速度不断增大,两组润滑油成膜性能差异越大。剪切稀化特性对成膜性能影响占主导因素随着温度不断升高,粘度指数改进剂的粘温性能对基础油成膜性能的影响占主导因素.载荷变化对含不同粘度指数改进剂基础油成膜性能差异的影响不明显。Modified Carreau-Yasuda rheological model was used to describe the shearing thinning behavior and the equation of WLF was used to represent the viscosity-temperature relationship of the base oil containing the viscosity index improver. The changing rules of the lubricating property of two groups of base oil containing different viscosity index improvers under various working conditions were studied. The results show that base oil with different viscosity index improvers has different viscosity-temperature properties and shear-thinning characteristics. As the speed increasing, the film forming property of the two groups of lubricating oil present difference greatly. The shear thinning characteristic is the dominant factor. As the temperature increasing,the viscosity-temperature property of the viscosity index improver becomes the dominant factor affecting the film forming ability of base oil. The load has little effect on the difference of lubricating performance.

关 键 词：粘度指数改进剂 粘温性能 剪切稀化效应 成膜特性 

分 类 号：TH117.2[机械工程—机械设计及理论]