凸轮-挺柱热弹流润滑的挤压效应分析  

Numerical Analysis of Squeeze Effect on the Lubrication of Cam/Tappet Pair

作　　者：常秋英[1] 高凯[1] 杨沛然[2] 

机构地区：[1]北京交通大学机械与电子控制工程学院,北京100044 [2]青岛理工大学,山东青岛266033

出　　处：《北京理工大学学报》2016年第11期1127-1130,共4页Transactions of Beijing Institute of Technology

基　　金：国家自然科学基金资助项目(51075026);国家部委预研项目(62501036025)

摘　　要：在凸轮-挺柱热弹流润滑仿真平台上研究了挤压效应对润滑油膜厚度、接触应力、润滑油温度和摩擦因数的影响.通过对比瞬态热弹流(TTEHL)仿真结果和准稳态热弹流(QTEHL)仿真结果发现,挤压效应使得膜厚、接触应力、温度和摩擦因数在相位上滞后于准稳态仿真结果,在凸轮-挺柱的一个工作周期内,挤压效应仅仅在几个工况突变点对上述参数的大小有明显影响,尤其是在卷吸速度为0的两个位置,挤压效应对接触应力、油膜温度和摩擦因数影响最为显著.Squeeze effects on the lubrication behaviour of cam-tappet were investigated with a thermal elasto hydrodynamic lubrication（TEHL）simulator numerically.Comparing transient TEHL（TTEHL）simulation results with quasi-steady TEHL（QTEHL）simulation results,it is shown that the changes of film thickness,pressure,temperature and friction coefficient calculated from TTEHL model has a time lag from that of quasi-steady model.During an operating cycle of cam-tappet,only at the points with radical alteration of operating condition does the squeeze have significant effects on the tribological parameters,especially at the zero entrainment velocity points the effects are most remarkable.

关 键 词：凸轮 挤压效应 热弹性流体动力润滑 摩擦因数 

分 类 号：TK407.9[动力工程及工程热物理—动力机械及工程]