钢球滚子弧面分度凸轮机构弹流润滑分析  

Elastohydrodynamic Lubrication Analysis of Globoidal Indexing Cam with Steel Ball

作　　者：付振山[1,2] 冯显英[1] 李蕾[1] 张成梁[1] 

机构地区：[1]山东大学机械工程学院,济南250061 [2]威海职业学院机电工程系,威海264210

出　　处：《农业机械学报》2011年第6期208-212,共5页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国家自然科学基金资助项目(50875153)

摘　　要：利用Ham rock-Dowson膜厚度公式和点接触中心区油膜计算公式,推导出钢球滚子弧面分度凸轮机构中钢球和凸轮滚道接触油膜厚度的计算公式。利用数值计算方法,比较分析了凸轮在采用修正等速、修正梯形加速度和修正正弦加速度运动规律曲线时,整个分度周期内油膜厚度的变化。讨论了凸轮转速、分度盘负载力矩、钢球直径、凸轮滚道截面半径与分度盘直径比等参数对油膜厚度的影响,为钢球滚子弧面分度凸轮的润滑设计提供了理论依据。Based on Hamrock-Dowson and film thickness calculation formulae,the EHD film thickness formulae of globoidal indexing cam mechanism of steel ball between steel ball and cam raceway were deduced.By using numerical analysis method,film thickness of cams with modified constant velocity motion curve,modified trapezoidal acceleration motion curve and modified sine acceleration motion curve respectively were compared during the entire indexing cycle.The effects of cam speed,load torque on indexing plate,ball diameter,indexing plate diameter,curvature ratio,etc.on film thickness were also discussed.It provided theoretical basis for the lubrication design of globoidal indexing cam of steel ball.

关 键 词：钢球滚子 弧面分度凸轮 弹性流体动力润滑 油膜厚度 润滑状态 

分 类 号：TH112.1[机械工程—机械设计及理论]