基于恒压液压系统的ZL50装载机节能技术  

Energy-saving technique for loader ZL50 based on constant pressure hydraulic system

作　　者：姚永明[1] 刘顺安[1] 尚涛[1] 陈延礼[1] 周旭辉[1] 

机构地区：[1]吉林大学机械科学与工程学院,长春130022

出　　处：《吉林大学学报（工学版）》2011年第1期117-121,共5页Journal of Jilin University:Engineering and Technology Edition

基　　金：国家自然科学基金项目(50475011);吉林大学'985工程'项目(450022102002)

摘　　要：为解决ZL50装载机油耗高的问题,构建了新的液压系统。首先阐明了恒压液压系统的节能原理,引出一种新型二次调节元件——液压变压器。随后建立液压变压器排量及压力的数学模型,并在液压变压器配流盘控制角-90°～90°内仿真,分析其排量与压力特性。在此基础上构建装载机新的液压系统,分析其工作过程并与原液压系统比较,得出其节能原因。根据装载机各工况下消耗的功率来确定新液压系统主要元件的参数。在主泵转速为0～2200r/min内的仿真表明:新液压系统的装机功率约为原液压系统的43%,节能效果明显。A new hydraulic system was built for the wheel loader ZL50 to save its energy consumption. The energy saving principle of the constant pressure hydraulic system was described and a new secondary regulation component hydraulic transformer（HT） was introduced. A mathematical model was established for the displacement and pressure of the HT, and the simulation was performed for the HT under its port plate control angle -90°-90° to analyze its displacement and pressure characteristics. A new hydraulic system was built on this basis and its working process was analyzed and compared with the original hydraulic system to reveal its energy saving potential. The parameters of the main components of the new hydraulic system were defined by the power consumptions of the loader under different operating conditions. The simulation under main pump speeds 0- 2200 r/min indicates that the installation power of the new system was reduced to 43% of the original system, showing the clear energy-saving benefit.

关 键 词：液压传动与控制 恒压液压系统 液压变压器 二次调节 ZL50装载机 节能 

分 类 号：TH137[机械工程—机械制造及自动化]