• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2021, Vol. 57 ›› Issue (12): 258-266,284.doi: 10.3901/JME.2021.12.258

• 交叉与前沿 • 上一篇    下一篇

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非对称泵控装载机动臂特性研究

王翔宇, 张红娟, 杨敬, 葛磊, 郝云晓, 权龙   

  1. 太原理工大学新型传感器及智能教育部实验室 太原 030024
  • 收稿日期:2020-09-20 修回日期:2021-03-08 出版日期:2021-08-31 发布日期:2021-08-31
  • 通讯作者: 权龙(通信作者),男,1959年出生,博士,教授,博士研究生导师。主要研究方向为电液伺服及比例控制技术。E-mail:quanlong@tyut.edu.cn
  • 作者简介:王翔宇,男,1992年出生,博士研究生。主要研究方向为电液控制系统,工程机械节能。E-mail:1411909069@qq.com
  • 基金资助:
    国家自然科学基金(51775363),NSFC-山西煤基低碳联合基金(U1910211)和山西省重点研发计划(201803D421040)资助项目

Research on the Characteristics of Wheel Loader Boom Driven by the Asymmetric Pump Controlled System

WANG Xiangyu, ZHANG Hongjuan, YANG Jing, GE Lei, HAO Yunxiao, QUAN Long   

  1. Key Lab of Advanced Transducers and Intelligent Control System of Ministry of Education, Taiyuan University of Technology, Taiyuan 030024
  • Received:2020-09-20 Revised:2021-03-08 Online:2021-08-31 Published:2021-08-31

摘要: 装载机通常采用阀控液压系统驱动动臂升降,上升过程积累了大量的动臂重力势能,在下降过程中经液压系统节流口节流作用耗散到环境中,频繁的升降过程产生了大量节流和溢流损耗,造成了系统发热与能量浪费。为消除液压系统的溢流与节流损失,提出采用闭式泵控原理驱动动臂单出杆液压缸;为平衡液压系统中单出杆液压缸的不对称流量和回收利用动臂的重力势能,提出含有三个配流窗口的非对称泵为闭式泵控液压系统供油。在非对称泵中,其中一个配流窗口与蓄能器相连,动臂下降阶段用于回收动臂重力势能,上升阶段与另外一个配流窗口共同为液压缸无杆腔供油,第三个配流窗口则与液压缸有杆腔相连。研究中,分析所提系统的工作原理,建立联合仿真模型,构建所提系统的试验平台,对所提系统的工作和能耗特性进行试验研究。试验结果表明,所提系统可平衡由闭式泵控单出杆液压缸造成的非对称流量,并实现动臂重力势能的回收,与原有阀控系统相比,最高可降低系统能耗47.19%。

关键词: 非对称泵, 闭式泵控, 能量回收, 装载机动臂

Abstract: The valve controlled hydraulic system is usually used to drive the boom hydraulic cylinder of wheel loader to complete the frequent lifting and falling action, which produces a lot of throttling and overflow losses. Moreover, the gravity potential accumulated by the boom in the lifting process is dissipated into the environment through the throttling effect of the orifice in the falling process, resulting in the system heating and energy waste. In order to eliminate the overflow and throttling loss of the system, the closed loop pump controlled hydraulic system is adopted to drive the boom single-rod hydraulic cylinder. And, to balance the flow asymmetry caused by the area difference of the single-rod hydraulic cylinder and recycle the gravity potential energy of the boom, the asymmetry pump with three ports is used for driving the hydraulic system. In the asymmetry pump, the first oil port is connected with the rod chamber of the hydraulic cylinder, the second port is connected with the rodless chamber of the hydraulic cylinder, and the third oil port is connected with the accumulator, which is used to recover the gravity potential energy of the boom during the falling stage. In the research, according to the working principle of the proposed system, a co-simulation model is established to verify the feasibility of the proposed system. Then the test platform of the proposed system is constructed, and the work and energy consumption characteristics of the system are studied. The experimental results show that, in the working process, the flow matching between supply and demand flow of single-rod hydraulic cylinder can be achieved by the proposed system. And, compared with the original valve controlled system, the energy consumption can be reduced by 47.19%.

Key words: flow self-balancing pump, closed loop pump controlled, energy recovery, wheel loader lifting device

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