汽车自动传动液的成膜特性分析  

Film-forming Characteristics of Automatic Transmission Fluid

作　　者：刘焕宝[1] 刘剑平[1] 杜乐瑶 

机构地区：[1]山东理工大学农业工程学院,山东淄博255049

出　　处：《润滑与密封》2014年第6期91-94,共4页Lubrication Engineering

摘　　要：在变速箱齿轮高速运动情况下,有时会因为干摩擦发生严重的磨损现象,需对不同工况下的自动传动液成膜特性进行分析。利用新型纳米膜厚侧量仪测量轿车自动传动液在不同工况条件下的干涉图像,分析其成膜特性,通过计算得到膜厚曲线并与Hamrock-Dowson理论预测值进行比较。结果表明:在不同的卷吸速度和载荷下,自动传动液的实际成膜能力始终超过Hamrock-Dowson理论预测结果,但在高速情况下,传动液弹流中心膜厚的实测值开始符合Hamrock-Dowson理论值的变化趋势。对经典弹流润滑油膜厚度公式进行修正,提出修正的弹流中心膜厚计算公式。The transmission gear sometimes occur serious wear at high speed conditions because of dry friction, so it is necessary toanalyze the film-forming properties of automatic transmission fluid at different conditions. The interferometer images of automatic transmis-sion fluid at different load and entrainment velocity were measured with a new nano film thickness measurement instrument, and the film-forming properties were analyzed. The film thickness of automatic transmission fluid was calculated, and the calculated results were com-pared with the theoretical results. The results show that the actual film-forming ability of automatic transmission fluid exceeds the Hamrock-Dowson theoretical prediction result at different entrainment velocity and load. But under high entrainment velocity, the variation tendencyof the actual testing central film thickness is basically the same as Hamrock-Dowson theoretical prediction result. By correcting the classicalelastohydrodynamie lubrication oil film thickness formula, a elastohydrodynamie lubrication central film thickness formula was put forward.

关 键 词：汽车自动传动液 弹流润滑 成膜特性 

分 类 号：TH117.2[机械工程—机械设计及理论]