增压条件下活塞的动压润滑分析  

Analysis on Hydrodynamic Lubrication of Piston in Supercharge Condition

作　　者：余志壮[1] 孟凡明[1] 董光能[1] 谢友柏[1] 

机构地区：[1]西安交通大学机械工程学院,陕西西安710049

出　　处：《润滑与密封》2005年第3期11-12,15,共3页Lubrication Engineering

基　　金：国家自然科学基金资助项目(50175088).

摘　　要：根据流体动力润滑理论与活塞动力学方程建立的分析模型,依据发动机燃气压力的变化,计算了增压前后的活塞裙部最小润滑油膜厚度和摩擦力。结果表明,发动机增压后,主推力边和次推力边的最小润滑油膜厚度分别变小,裙部的摩擦力和摩擦功耗增大。因增压后活塞润滑能力降低,并且摩擦功耗增加,会对整机的可靠性产生影响,这些都应当在增压改进设计时予以重视。The minimum lubrication oil film thickness and the friction force on piston skirt were calculated in the different combustion gas pressures. The establishment of model was based on hydrodynamic lubrication theory and piston dynamics. The results show that the minimum lubrication oil films at the major and minor thrust sides are all diminished, and the friction force as well as friction power consumption are increased in supercharged engine. For the supercharge design causes the deterioration of lubrication circumstances, consequently the reliability of the engine is affected, these should be recognized in the supercharge design.

关 键 词：润滑分析 润滑油膜厚度 动压 压条 摩擦功耗 动力学方程 分析模型 润滑理论 流体动力 燃气压力 活塞裙部 润滑能力 发动机 摩擦力 增压 可靠性 最小 推力 增大 

分 类 号：U464.133.1[机械工程—车辆工程] TK411.9[交通运输工程—载运工具运用工程]