串联式拖拉机液压功率分流无级变速箱的设计  

Design of Series Hydrostatic Power Split Tractor Transmission

作　　者：曹允莲 赵业慧 杨延强[1] 于镇伟 张婷婷 王光明[1,2] Cao Yunlian;Zhao Yehui;Yang Yanqiang;Yu Zhenwei;Zhang Tingting;Wang Guangming(College of Mechanical and Electronic Engineering,Shandong Agricultural University,Tai′an 271018,China;Shandong Provincial Key Laboratory of Horticultural Machineries and Equipment,Tai′an 271018,China)

机构地区：[1]山东农业大学机械与电子工程学院,山东泰安271018 [2]山东省园艺机械与装备重点实验室,山东泰安271018

出　　处：《农机化研究》2023年第1期250-255,共6页Journal of Agricultural Mechanization Research

基　　金：山东省自然科学基金项目(ZR2020QE163);山东省重点研发计划项目(2018GNC112008)。

摘　　要：为了在小功率拖拉机及其农业机械上实现无级调速,设计了一种串联式液压功率分流无级变速箱。首先,对无级变速箱的传动方案进行了介绍;其次,详细阐述了变速箱的参数设计和结构设计流程;再次,构建了该液压功率分流无级变速箱与静液压无级变速箱的效率计算模型,并通过试验获取了模型的关键参数;最后,根据效率模型的计算结果,对两种无级变速箱的传动效率和调速特性进行了比较。研究结果表明:所设计的无级变速箱不仅结构简单、成本可控,且具有较之于静液压无级变速箱更佳的效率特性。研究所得结论可为我国中小功率无级变速拖拉机和农业作业机械的研制提供理论依据和方法支撑。In order to realize stepless speed regulation on small power tractors and agricultural machinery,a novel hydrostatic power split CVT was designed in this study.Firstly,the transmission scheme of the CVT was introduced.Secondly,the design process of the transmission parameter and structure were elaborated.Thirdly,the efficiency calculation model of the hydrostatic power split CVT and the hydrostatic CVT was constructed,and the key parameters of the model were obtained through experiments.Finally,according to the calculation results of the simulation model,the efficiency and speed regulation characteristics of the two CVTs were compared.The results showed that the designed power split transmission is not only has simple structure and controllable cost,but also has better efficiency characteristic than hydrostatic CVT.The conclusions of this study can provide theoretical and methodological support for the development of medium and small power CVT tractors and agricultural machinery in China.

关 键 词：拖拉机 无级变速箱 行星排 功率分流 传动效率 

分 类 号：S219.032.1[农业科学—农业机械化工程]