装载机工作装置液压系统热特性  

Hydraulic system thermal characteristics of loader working device

作　　者：张钦国[1] 秦四成[1] 马润达 杨立光[2] 郗元[1] 刘晋侨 

机构地区：[1]吉林大学机械科学与工程学院,长春130022 [2]水利部长春机械研究所,长春130012 [3]西安交通大学机械工程学院,西安710049

出　　处：《吉林大学学报（工学版）》2016年第3期811-817,共7页Journal of Jilin University:Engineering and Technology Edition

基　　金：国家科技支撑计划项目(2013BAF07B04)

摘　　要：根据主要元件的产热和散热特征,建立液压系统热平衡数学模型。基于ADAMS和AMESim软件建立了装载机工作装置的动力学仿真模型和热液压系统联合仿真模型。仿真结果表明:由各种阀的功率损失而产生的热量约占总产热量的40%,是系统主要的产热源;液压油通过散热器前、后的温差约为10℃,散热器散热功率较低;环境温度越高热平衡温度越高。为了增大散热量,将风扇由机械驱动改为温控液压驱动,同时并联温控节流阀,结构改进后系统散热效率明显提高,热平衡温度满足工作要求,研究结果对装载机整车热管理系统的结构优化和控制策略的制定提供了指导。A heat balance mathematical model of the hydraulic system of loader was established according to the heat generation and heat dissipation characteristics of the main components.Dynamic simulation model of the working equipment and thermal system co-simulation model were built based on ADAMS and AMESim software.Simulation results show that all kinds of valve power losses generate the greatest amount of heat,which accounts for about 40% of the total heat generation.The temperature difference of hydraulic oil before and after the radiator is about 10°C,but the radiator cooling efficiency is low. The thermal equilibrium temperature increases with the ambient temperature.The hydraulic temperature control is adopted to drive the fan instead of mechanical driving,and the temperature control throttle valve is in parallel with the radiator in order to increase the cooling efficiency.The thermal equilibrium temperature of the improved system meets the working requirements.The results of this research can provide guidance for structural optimization and establishing control strategy of the loader vehicle thermal management system.

关 键 词：流体传动与控制 液压系统 热平衡计算 机-液联合仿真 散热系统优化 

分 类 号：TH137[机械工程—机械制造及自动化]