离合器带排转矩对液压机械无级变速器效率的影响分析  

Analysis of the Influence of Clutch Drag Torque on the Efficiency of Hydro-mechanical Continuously Variable Transmission

作　　者：柴蓉 张明柱[1,2] 王建华 贾方 Chai Rong;Zhang Mingzhu;Wang Jianhua;Jia Fang(School of Mechanical and Electronically Engineering,Henan University of Science and Technology,Luoyang 471003,China;Collaborative Innovation Center of Machinery Equipment Advanced Manufacturing of Henan Province,Luoyang 471003,China;State Key Laboratory of Power System of Tractor,Luoyang 471003,China)

机构地区：[1]河南科技大学机电工程学院,河南洛阳471003 [2]机械装备先进制造河南省协同创新中心,河南洛阳471003 [3]拖拉机动力系统国家重点实验室,河南洛阳471003

出　　处：《机械传动》2022年第4期63-67,94,共6页Journal of Mechanical Transmission

基　　金：国家自然科学基金(51375145);拖拉机动力系统国家重点实验室开放课题(SKT2019001、SKT2021005);河南省重大科技专项(191110213300)。

摘　　要：为研究多离合器对液压机械无级变速器(Hydro-mechanical continuously variable transmission,HMCVT)传动效率的影响,针对变速器中包含多个湿式摩擦离合器构成闭式回路的结构特征,分析了离合器带排转矩对液压机械无级变速器效率特性的影响。通过对影响传动效率的离合器分离阶段所产生的带排转矩的分析与计算,建立了闭式回路中离合器分离阶段的动力传递计算模型,推导出闭式传动中离合器带排转矩造成的功率损失计算公式,进而推导出传动系总效率的计算方法,通过实例计算表明了HMCVT中的多个摩擦离合器的带排损失对其传动效率的影响较大。In order to study the influence of multiple clutches on the transmission efficiency of a hydromechanical continuously variable transmission(HMCVT),the structure characteristics of a closed loop consisting of multiple wet friction clutches in the transmission are investigated.The influence of clutch drag torque on the efficiency characteristics of hydro-mechanical CVT is analyzed.By analysis and calculation of the drag torque generated in the clutch disengagement stage,which affects the transmission efficiency,a calculation model for power transmission in the clutch disengagement stage in a closed loop is established,a calculation formula for power loss caused by clutch drag torque in closed transmission is deduced and a calculation method for the total efficiency of the transmission system is further derived.The calculation results show that the band and row loss of multiple friction clutches in HMCVT has a great influence on its transmission efficiency.

关 键 词：液压机械无级变速器 离合器 带排转矩 效率特性 

分 类 号：TH137.5[机械工程—机械制造及自动化]