生物质燃油对柴油机润滑油成膜性能的影响  

Effect of Emulsified Biomass-Fuel on the Film Formation Behavior of Diesel Engine Lubricating Oil

作　　者：李豹[1] DEARN D Karl 刘一鸣[1] 胡恩柱[1] 徐玉福[1] 胡献国[1] LI Bao DEARN D Karl LIU Yiming HU Enzhu XU Yufu HU Xianguo(Institute of Tribology, Hefei University of Technology, Hefei 230009, China School of Mechanical Engineering, University of Birmingham, Birmingham B15 2TT, UK)

机构地区：[1]合肥工业大学摩擦学研究所,安徽合肥230009 [2]英国伯明翰大学机械工程学院

出　　处：《石油学报（石油加工）》2016年第6期1142-1149,共8页Acta Petrolei Sinica(Petroleum Processing Section)

基　　金：国家自然科学基金项目(51275143;51450110436;51405124)资助

摘　　要：生物质燃油作为化石能源燃料的替代品之一,应用过程中的燃油稀释问题不可避免,研究生物质燃油对发动机润滑油成膜性能的影响极为重要。利用活塞环-缸套摩擦磨损试验机,研究发动机新型代用燃料——生物质燃油对发动机润滑油(CH-4 20W-50)成膜性能的影响。采用扫描电子显微镜及附带的能谱、X射线光电子能谱仪等分析手段对摩擦后的缸套表面形貌、摩擦反应膜组分进行了分析。结果表明,生物质燃油(其质量分数为10%)稀释致使润滑油黏度从24.55mm^2/s下降到14.55mm^2/s,进而引起油膜厚度降低;此外,摩擦诱导缸套表面形成含有ZnO、Fe的氧化物、硫化物、磷酸盐和含氮有机物类物质的摩擦反应膜,其中ZnO、FeS、含氮有机物和磷酸盐起着主要的抗磨减摩功效。燃油的稀释作用及引起摩擦反应膜的组成的变化是生物质燃油对润滑油成膜性能影响的主要原因。As a kind of petroleum fuel alternatives,emulsified biomass fuel（EBF）can be used in a diesel engine.The problem of lubricating oil dilution by diesel engine fuel can＇t be prevented.Research on the effect of EBF on the oil film formation behavior of diesel engine lubricating oil was very important.The friction and wear behaviors of engine lubricating oil（CH-4 20W-50）were investigated as diluted by different contents of EBF by using a cylinder-piston ring tribometer.The surface morphology and composition of oil film on the cylinder liners were analyzed by SEM with EDS and XPS.The results showed that the kinematic viscosity of lubricating oil decreased from24.55mm^2/s to 14.55mm^2/s when diluted by 10% EBF,leading to the decrease of oil film thickness.Besides,the friction induced the formation of tribofilm containing ZnO,iron oxides,sulfides,phosphates,nitrogen-containing chemicals,which was benefit for the anti-friction and anti-wear properties of engine lubricating oil.The mechanism of EBF influence on the oil film formation of lubricating oil was ascribable to its dilution role and then the composition change of tribofilm.

关 键 词：生物质燃油 润滑油 活塞环-缸套 摩擦反应膜 

分 类 号：TK6[动力工程及工程热物理—生物能]