小型挖掘机开式节流恒功率控制主泵效率研究

Research on Efficiency Characteristics of Constant Power Controlled Main Pump in Open Throttle System on Mini Excavators

开式节流恒功率控制液压系统在小型液压挖掘机上得到了广泛的应用。按照小型挖掘机实际工况特点,推导建立了开式节流系统主泵的动态数学模型,再结合主泵的p-q曲线,分析得出了主泵输出效率与主泵工作参数之间的特性。

Constant power controlled main pumps have been widely used in the open throttle hydraulic systems on mini hydraulic excavators. According to the characteristics of the actual condition of small excavators, a dynamic mathematical model of main pump in the open throttle system is deduced and established. Combined with the main pump p-q curve analysis, the relational characteristics between the output efficiency and the working parameters of the main pump are revealed in this paper.