液压机械无级变速器动态特性的影响因素研究  

Influencing factors for dynamic characteristics of hydro-mechanical continuously variable transmission

作　　者：苑士华[1] 魏超[1] 张银彩[2] 

机构地区：[1]北京理工大学机械与车辆工程学院,北京100081 [2]石家庄铁道学院机械工程分院,石家庄050043

出　　处：《农业工程学报》2008年第2期33-38,共6页Transactions of the Chinese Society of Agricultural Engineering

基　　金：国家“十五”预研支撑项目

摘　　要：为了深入研究液压机械无级变速器的动态特性,建立了液压机械无级变速器的调速模型,并通过分析油液黏度、液压路工作容积以及输出轴负载惯量对调速系统阻尼比、上升时间以及调节时间的影响,揭示了这3个因素对系统动态特性的影响。理论分析与试验结果表明:增大油液黏度或者减小输出轴负载惯量,将使响应速度变快,超调量增大;减小液压路工作容积,将使响应速度变快,超调量减小。因此,减小液压路的工作容积是提高系统综合性能的最好方法。In order to study the dynamic characteristics of hydro-mechanical continuously variable transmission deeply, the speed governing system model of hydro-mechanical continuously variable transmission was built. The influences of oil viscosity, working volume and inertia of output port on damping ratio, rising time and setting time were analyzed, and influencing rules of those three factors on system dynamic characteristics were achieved. The analysis results show that higher oil viscosity or smaller moment of inertia results in faster response speed and larger overshoot, and smaller working volume results in faster response and smaller overshoot. Therefore, decreasing working volume of hydraulic branch is the best way to improve the performance of hydro-mechanical continuously variable transmission. In the end, the conclusion was proved by test.

关 键 词：液压机械无级变速器 动态特性 油液黏度 油路容积 转动惯量 

分 类 号：TH137.3[机械工程—机械制造及自动化]