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Full Length Article | Open Access

Multi-parameter load sensing pump model simulation and flow rate characteristics research

ZongXia JIAOa,c,d,f, Zhenyu WANGa,d, Xiaochao LIUb,c,d,f(), HuJiang WANGe, Pengyuan QIc,d,f, Weizhi QIAOf
School of Automation Science and Electrical Engineering, Beihang University, Beijing 100083, China
State Key Laboratory of Fluid Power and Mechatronic Systems, Zhejiang University, Hangzhou 310027, China
Research Institute for Frontier Science, Beihang University, Beijing, 100083, China
Science and Technology on Aircraft Control Laboratory, Beihang University, Beijing 100083, China
Science and Technology on Vehicle Transmission Laboratory, China North Vehicle Research Institute, Beijing 100072, China
Ningbo Institute of Technology, Beihang University, Ningbo 315800, China

Peer review under responsibility of Editorial Committee of CJA.

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Abstract

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 structure 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 process of the load sensing pump. Moreover, a frequency sweep method is proposed to analyze the frequency 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.

Keywords

Flow rate characteristicsFrequency analysisHydraulicLoad sensing pumpNonlinear

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Chinese Journal of Aeronautics
Volume 35 Issue 12,
December 2022
Pages 296-308
DOI: 10.1016/j.cja.2021.12.007
Cite this article:
JIAO Z, WANG Z, LIU X, et al. Multi-parameter load sensing pump model simulation and flow rate characteristics research. Chinese Journal of Aeronautics, 2022, 35(12): 296-308. https://doi.org/10.1016/j.cja.2021.12.007
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