大功率拖拉机HMCVT的参数优化设计  

Parameter optimization design of high-power tractor HMCVT

作　　者：夏长高[1] 刘磊 XIA Changgao;LIU Lei(School of Automotive and Traffic Engineering,Jiangsu University,Zhenjiang 212013,China)

机构地区：[1]江苏大学汽车与交通工程学院,江苏镇江212013

出　　处：《重庆理工大学学报（自然科学）》2024年第5期179-186,共8页Journal of Chongqing University of Technology：Natural Science

基　　金：苏北科研专项-先导性项目(SZ-YC202165)。

摘　　要：基于大功率拖拉机设计了一种新型的高传动效率和大变速范围的液压机械无级变速器(HMCVT),采用基于惩罚函数的遗传算法,对变速器的传动系统参数进行优化设计。通过Matlab软件对液压机械无级变速器的无级变速特性、转矩特性、功率分流比特性进行仿真分析,验证所设计的传动参数的合理性。此外,通过啮合功率法对系统总传动效率进行计算,进一步验证所设计的传动参数的合理性。结果表明:该液压机械无级变速器方案能够满足大功率拖拉机无级变速调速特性,且各区段有较大范围的速度区间和较高的传动效率,变速器各工作段的传动效率都能达到80%以上。Hydraulic Mechanical Continuously Variable Transmission(HMCVT)is a composite transmission that combines hydraulic continuously variable transmission and mechanical continuously variable transmission.This paper designs a new type of hydraulic mechanical continuously variable transmission based on high-power tractors.To design a hydraulic mechanical continuously variable transmission with high transmission efficiency and large transmission range,a genetic algorithm based on penalty function is proposed to optimize the transmission system parameters of the transmission.Through the simulation and analysis of the continuously variable characteristics,torque characteristics,and power split bit characteristics of a hydraulic mechanical continuously variable transmission using Matlab software,the rationality of the designed transmission parameters is verified.Moreover,the total transmission efficiency of the system is calculated by employing the meshing power method to further verify the rationality of the designed transmission parameters.Our results show the hydraulic mechanical continuously variable transmission scheme meets the characteristics of high-power tractor continuously variable speed regulation,and wide speed ranges and high transmission efficiency in each section are achieved.The efficiency of each working section of the transmission exceeds 80%.

关 键 词：液压机械无级变速器 特性分析 惩罚函数 改进遗传算法 参数优化 

分 类 号：S219[农业科学—农业机械化工程]