中国工程机械学报

随着我国基础建设需求的飞速增长和节能减排要求的不断提高，市场对液压挖掘机工作性能的要求也越来越高。电液比例多路阀作为挖掘机关键的高端核心零部件，其原理特性对挖掘机整机的工作性能和稳定性有关键影响。目前市场上大部分挖掘机采用的是进口比例多路阀，国内高性能多路阀的技术水平和国外仍有很大差距。本文介绍了挖掘机的工况特点及电液比例多路阀的应用现状，深入分析目前行业广泛应用的多路阀的原理及关键技术，并介绍电液比例多路阀相关技术的研究进展，最后阐述挖掘机电液比例多路阀的发展趋势。

With the rapid growth of national infrastructure demand and the continuous improvement of energy conservation and emission reduction requirements, the requirements for the working performance of hydraulic excavators becomes higher and higher. As the key high-end core component of excavator, the principle and characteristics of electro-hydraulic proportional multiway valve have a key impact on the working performance and stability of excavator. At present, most excavators in the market use imported proportional multi-way valves. There is still a large gap between the technical level of domestic high-performance multi-way valves and foreign countries. Firstly, the working condition characteristics of excavator and the application status of electrohydraulic proportional multi-way valve are introduced. Secondly, the principle and key technology of multi-way valve widely used in the industry are deeply analyzed. Thirdly, the research progress of electro-hydraulic proportional multi-channel valve is introduced. Finally, the development trend of excavator electro-hydraulic proportional multi-way valve is described.