Load sensing pumps have been widely used in diverse hydraulic systems.Studies show that structural parameters have undeniable impacts on the characteristics and efficiency of the load sensing pump.The main purpose of this article is to study the influence of load sensing pump struc-ture parameters on flow characteristics.In the present study,a nonlinear multi-parameter model is proposed for this type of pump.In this model,different parameters,including spool clearance,spool covering amount,internal leakage are considered to reflect the displacement adjustment pro-cess of the load sensing pump.Moreover,a frequency sweep method is proposed to analyze the fre-quency domain of the nonlinear mathematical model.An experiment rig was built to study the influence of key structural parameters on the dynamic follow-up characteristics of the pump flow.The obtained results show that the diameter of the orifice d can significantly affect the working characteristics of the pump.It is found that a large diameter of the orifice d can improve the phase following ability of the system,while a small diameter of the orifice d can reduce the bypass flow rate and increase the amplitude following ability.This paper provides a new consideration to study the dynamic follow-up characteristics of the load sensing pump.

ZongXia JIAO;Zhenyu WANG;Xiaochao LIU;HuJiang WANG;Pengyuan QI;Weizhi QIAO

School of Automation Science and Electrical Engineering,Beihang University,Beijing 100083,China;Research Institute for Frontier Science,Beihang University,Beijing,100083,China;Science and Technology on Aircraft Control Laboratory,Beihang University,Beijing 100083,China;Ningbo Institute of Technology,Beihang University,Ningbo 315800,China;State Key Laboratory of Fluid Power and Mechatronic Systems,Zhejiang University,Hangzhou 310027,China;Science and Technology on Vehicle Transmission Laboratory,China North Vehicle Research Institute,Beijing 100072,China

中国航空学报（英文版）

[1]ZongXia JIAO;Zhenyu WANG;Xiaochao LIU;HuJiang WANG;Pengyuan QI;Weizhi QIAO-.Multi-parameter load sensing pump model simulation and flow rate characteristics research)[J].中国航空学报（英文版）,2022(12):296-308

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