拖拉机机电复合无级变速器传动特性研究  

Research on Transmission Characteristics of Tractor Electromechanical Compound Continuously Variable Transmission

作　　者：李光耀 张明柱[1,2] 韩建刚 王建华 Li Guangyao;Zhang Mingzhu;Han Jiangang;Wang Jianhua(College of Mechatronics Engineering,Henan University of Science and Technology,Luoyang 471003,China;Advanced Manufacturing of Mechanical Equipment Henan Collaborative Innovation Center,Luoyang 471003,China;State Key Laboratory of Power System of Tractor,Luoyang 471039,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471039

出　　处：《农机化研究》2022年第5期232-237,共6页Journal of Agricultural Mechanization Research

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

摘　　要：提出一种拖拉机用机电复合无级变速器方案(Electromechanical Compound Continuously Variable Transmission, EMCVT),将发动机动力分流为两路,机械路高效传动大功率,电机路实现无级变速,二路通过双行星排汇流完成高效无级变速传动。分析了传动系统的速比特性、转矩特性和电功率分流特性,发现系统配备小功率电动机即能满足大功率拖拉机的无级变速传动要求。研究了效率特性,结果显示:与液压机械无级变速器(HMCVT)相比,EMCVT的传动效率最大提高了9%,最高效率达到95.6%。对于长期满功率大负载作业的拖拉机,应用机电分流变速传动,无需配备大容量电池和大功率电动机,能够改善拖拉机的结构布局。研究为拖拉机无级变速传动提供了一类高效率、高集成度和低成本的解决方案。A scheme of electromechanical compound continuously variable transmission(EMCVT) for tractors is proposed, which splits the engine power into two circuits, the mechanical circuit efficiently transmits high power, the motor circuit realizes infinitely variable transmission, and the two circuits pass through the dual planetary row.Complete high-efficiency continuously variable transmission.The speed ratio characteristics, torque characteristics and electric power shunt characteristics of the transmission system are analyzed, and it is shown that the system equipped with low-power motors can meet the continuously variable transmission requirements of high-power tractors.The efficiency characteristics are studied, and the results show that compared with the hydromechanical continuously variable transmission(HMCVT), the transmission efficiency of EMCVT is increased by 9% at the maximum, and the maximum efficiency reaches 95.6%. For long-term full-power and high-load tractors, electromechanical shunt variable-speed transmission is used, and there is no need to be equipped with large-capacity batteries and high-power motors, which can improve the structure of the tractor. The research provides a kind of high-efficiency, high-integration and low-cost solutions for tractor’s continuously variable transmission.

关 键 词：机电复合无级变速器 传动特性 传动系统 效率特性 拖拉机 

分 类 号：S219.032.1[农业科学—农业机械化工程] TH139[农业科学—农业工程]