离合器摩擦片动静摩擦系数对大马力推土机换挡性能的影响  

Effect of dynamic and static friction coefficients of clutch friction plate on shifting performance of high-horsepower bulldozer

作　　者：王华栋 何登辉 刘澳 张文泽 WANG Huadong;HE Denghui;LIU Ao;ZHANG Wenze

机构地区：[1]长安大学道路施工技术与装备教育部重点实验室,陕西西安710064

出　　处：《现代机械》2024年第1期31-35,共5页Modern Machinery

摘　　要：针对大马力推土机在换挡过程中出现的冲击度过大的问题,提出评价换挡性能的两个指标:冲击度、滑摩功;建立大马力推土机传动系统AMESim和MATLAB联合仿真模型;进而研究变速箱离合器摩擦片动、静摩擦系数对换挡冲击度、滑摩功的影响。结果表明:在一挡起步和二挡降一挡时的换挡冲击最大,在二挡降一挡过程中,随着动摩擦系数的增大,换挡结合时间减小,冲击度、滑摩功也随之增大,当换挡完成时,冲击度幅值减小,滑摩功不随动摩擦系数变化而变化;随着静摩擦系数的增大,换挡冲击度、滑摩功变化不明显。Aiming at the problem that the impact of the high-horsepower bulldozer in the process of shifting is too large,two indexes are put forward to evaluate the shifting performance:impact degree and slipping work.The AMESim and MATLAB co-simulation model of the transmission system of the high-horsepower bulldozer is established.Then the influence of the dynamic and static friction coefficients of the clutch friction plate on the shift impact and slipping work is studied.The results show that the shift impact is the largest when the first gear starts and the second gear drops into the first gear.In the process of the second gear dropping into the first gear,with the increase of the dynamic friction coefficient,the shift combination time decreases,and the impact and slipping work also increase.When the shift is completed,the impact amplitude decreases,and the slipping work does not change with the change of the dynamic friction coefficient.With the increase of the static friction coefficient,the shift impact and slipping work do not change significantly.

关 键 词：AMESIM MATLAB 动摩擦系数 静摩擦系数 冲击度 滑摩功 

分 类 号：TH22[机械工程—机械制造及自动化]