装载机定变量液压系统能效提升研究  

Study on Energy Efficiency Improvement of Fixed-variable Displacement Hydraulic System for Loader

作　　者：丁卫 王宜前 高名乾 李固 朱庆轩 DING Wei;WANG Yi-qian;GAO Ming-qian;LI Gu;ZHU Qing-xuan(Liuzhou Liugong Hydraulic Parts Co.,Ltd.,Liuzhou 545006,China)

机构地区：[1]柳州柳工液压件有限公司,广西柳州545006

出　　处：《液压气动与密封》2022年第8期59-62,共4页Hydraulics Pneumatics & Seals

摘　　要：现装载机主流工作液压系统主要为开中心定变量液压系统与全变量液压系统。开中心定变量液压系统,仅在整机纯运输工况下,工作在变量模式。一旦工作装置动作即转变为常规的开中心定量液压系统,此时液压系统将存在较大的节流损失。全变量液压系统在两工作装置复合动作时,低负载侧同样存在较大的节流损失。该文提出的闭中位定变量液压系统,整机工作装置单动作工况,工作模式等效于变量液压系统,全程无节流损失。整机工作装置复合动作工况,由于采用双进油口布置,双泵独立向各自控制的工作装置供油。液压系统工作过程中,无全变量液压系统存在的低负载侧的节流损失。At present,the main working hydraulic systems of loaders are open center fixed-variable hydraulic system and full variable hydraulic system.The open center fixed-variable hydraulic system works in variable mode only under the pure transportation condition.Once the working device acts,it will change to the conventional open center quantitative hydraulic system,and there will be a large throttling loss in the hydraulic system.When the two working devices of the full variable hydraulic system act in combination,there is also a large throttling loss at the low load side.The closed center position fixed-variable hydraulic system proposed in this paper,when the working device operates under single action working condition,the working mode is equivalent to the variable hydraulic system,and there is no throttling loss in the whole process.Under the compound action working condition of the working device,since the double oil inlet arrangement is adopted,the two pumps supply oil to the working devices controlled by each other independently.During the operation of the hydraulic system,there is no throttling loss at the low load side of the full variable hydraulic system.

关 键 词：液压系统能效 闭中位定变量液压系统 节流损失 研究 

分 类 号：TH137[机械工程—机械制造及自动化]