多段式液压机械无级变速器方案设计与特性分析  

Drive Scheme Design and Characteristic Analysis of Multi-range Hydro-mechanical CVT

作　　者：徐立友[1] 周志立[1] 彭巧励[1] 王彬彬[2] 

机构地区：[1]河南科技大学,洛阳471003 [2]中国一拖集团有限公司,洛阳471004

出　　处：《中国机械工程》2012年第21期2641-2645,共5页China Mechanical Engineering

基　　金：河南省重点科技攻关计划资助项目(102102210165);河南省基础与前沿技术研究计划资助项目(122300410245)

摘　　要：针对目前拖拉机多挡有级变速器换挡过程中存在的传动比不连续问题,设计了一种新型多段式液压机械无级变速器。以东方红1302R拖拉机为对象,分析了其无级调速特性、平稳换段条件、转矩特性、液压功率分流比、效率特性及牵引特性。分析研究表明,所设计的液压机械无级变速器具有变速范围宽、传递功率大、效率高、传动平稳等优点,可较好地满足拖拉机复杂多变的作业工况要求。To improve the transmission ratio discontinuity problem during the gear shift process in a multi-gear fixed step ratio transmission of the tractors,a hydro-mechanical CVT for tractors was developed.Taking DFH 1302R tractor as the research object,the stepless speed regulation characteristics,condition of smooth shifting,torque characteristics,power split flow characteristics,efficiency characteristics and tractive characteristics of HMCVT were analyzed.By theoretical analysis,the results show that the designed HMCVT has advantages of wide speed governing range,large power transmission,high drive efficiency and steady transmission,which can meet the requirements of complicated variable working conditions of the tractors.

关 键 词：液压机械传动 无级变速器 传动方案 特性分析 

分 类 号：S219.032.1[农业科学—农业机械化工程] TH137.3[农业科学—农业工程]