一、前言为了改进性能,提高功率利用率,在现代液压挖掘机中,变量调节系统,获得了最广泛的应用。合理地选择和设计变量方式,无疑是液压挖掘机设计中一个关键问题。本文根据液压挖掘机的现状和发展趋势,介绍几种典型的变量方式。中小型液压挖掘机大多应用两台大小相同的主油泵。所以,下面的讨论,主要针对双泵系统。最后介绍一种适用于大型液压挖掘机的叁泵变量系统。 I. INTRODUCTION In order to improve the performance and improve the power utilization, in the modern hydraulic excavator, the variable regulation system has obtained the most extensive application. Reasonable way to select and design variables is undoubtedly a key issue in hydraulic excavator design. Based on the current situation and development trend of hydraulic excavators, this paper introduces several typical variable methods. Most small and medium size hydraulic excavators use two main pumps of the same size. So, the following discussion, mainly for double pump system. Finally, a three-pump variable system suitable for large hydraulic excavators is introduced.