泵阀双源协同驱动多执行器系统特性研究  

Characteristics of Pump and Valve Dual-Source Collaborative Driving Multi-Actuator System

作　　者：梁涛[1] 张晓刚[1] 权龙[1] 赵二辉 LIANG Tao;ZHANG Xiaogang;QUAN Long;ZHAO Erhui(Key Lab of Advanced Transducers and Intelligent Control System of Ministry of Education and Shanxi Province, Taiyuan University of Technology, Taiyuan 030024, China)

机构地区：[1]太原理工大学新型传感器与智能控制教育部和山西省重点试验室,太原030024

出　　处：《西安交通大学学报》2022年第3期1-11,共11页Journal of Xi'an Jiaotong University

基　　金：国家自然科学基金资助项目(52075358,51775363)。

摘　　要：针对工程机械等多执行器复合作业装备中阀控系统节流损失严重、泵控系统装机功率过大的问题,提出一种泵阀双源协同驱动多执行器系统。首先对不同系统能效机理进行理论分析,明确了载荷差异造成阀控系统大量节流损失的根本原因是各执行器驱动腔压力不同。在此基础上,设计了基于所提系统的极低压损控制策略。然后,借助SimulationX仿真软件,建立了37 t液压挖掘机仿真模型,通过试验验证了模型的准确性,并进一步建立了泵阀双源协同驱动和电液流量匹配系统液压挖掘机联合仿真模型。最后,分析对比动臂和铲斗空载复合动作工况下,所提系统与电液流量匹配系统的运行特性和能量特性。结果表明:与电液流量匹配系统相比,所提系统显著改善了重载执行器响应滞后现象,提升了系统运行平稳性,同时大幅降低了载荷差异造成的轻载执行器回路压力损失,整机节流损失和能耗分别降低了67.2%和39.8%。本研究可为降低多执行器复合作业装备节流损失提供全新的解决方案。In the multi-actuator compound operation equipment such as engineering machinery,the throttling loss of the valve-controlled system is serious and the installed power of the pump-controlled system is too large.Therefore,a pump and valve dual-source collaborative driving multi-actuator system(PVDS)is proposed.Firstly,the energy efficiency mechanism of different systems is analyzed theoretically,and it is identified that the essential cause of the large throttling loss of the valve-controlled system due to load difference is the different pressures of actuator driving chambers.Based on this,a extremely low-pressure loss control strategy based on the proposed system is designed.Then,simulation model of a 37 t excavator is established by SimulationX,and its accuracy is verified by experiments.Furthermore,co-simulation models of the hydraulic excavator with the PVDS and electro-hydraulic flow matching system are established.Finally,under the no-load condition of combined action of boom and bucket,the operation performance and energy characteristics of the proposed system and the electro-hydraulic flow matching system are analyzed and compared.The results show that compared with the electro-hydraulic flow matching system,the proposed system significantly improves the response lag of the heavy-load actuator and the stability of the system.Meanwhile,the pressure loss of the light-load actuator caused by load difference is greatly reduced,the throttling loss and energy consumption of the whole system are reduced by 67.2%and 39.8%,respectively.This research can provide a new solution to the reduction of the throttling loss of multi-actuator compound operation equipment.

关 键 词：阀控系统 泵控系统 工程机械 多执行器载荷差异 节能 

分 类 号：TH137[机械工程—机械制造及自动化]