基于AMESim的液压机械无级变速器建模与仿真

Modeling and simulation of hydro-mechanical continuously variable transmission based on AMESim

液压机械连续无级传动将机械传动和液压传动综合运用,传动效率高,且能实现大功率无级传动。针对提出的液压机械无级传动方案,分析了其速比特性,表明该传动方案能够实现较大调速范围的无级传动。利用AMEsim软件建立了发动机、液压机械无级变速器以及负载的物理模型,仿真分析了液压机械无级变速器的调速特性、输出转矩特性以及纯液压段起步加速特性。仿真结果表明:设计的HMCVT传动方案能够实现预期的无级调速特性,各工作段速比呈等比式增长,符合设计要求,且能够在较短时间内完成起步加速。

Hydro-mechanical stepless transmission combines mechanical transmission and hydraulic transmission. It has high transmission efficiency and can realize high-power variable transmission. Aiming at the proposed hydro-mechanical stepless transmission scheme,the speed ratio characteristic is analyzed,which is shown that the transmission scheme can realize stepless transmission in the wider speed range. The physical models of the engine,HMCVT and the load are established by AMEsim. The speed characteristics,output torque characteristics and the acceleration characteristics of the HMCVT are simulated. The results show that： the designed HMCVT transmission scheme can achieve the expected stepless speed regulation characteristics,and the speed ratio of each working section increases in proportion,and the starting acceleration can be completed in a relatively short time,which meets the design requirements.