Journal of South China University of Technology(Natural Science) >

2023 , Vol. 51 >Issue 9: 44 - 55

DOI: https://doi.org/10.12141/j.issn.1000-565X.220651

Mechanical Engineering

Influence of Oil Characteristics on Flow Pulsation of Axial Piston Pump of Large Displacement Under Solid-Liquid-Temperature Coupling

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  • 1.College of Mechaniacal and Electrical Engineering，Central South University，Changsha 410083，Hunan，China
    2.China Railway Engineering Equipment Group Co. ，Ltd. ，Zhengzhou 450016，Henan，China
    3.China Railway Construction Heavy Industry Corporation Limited，Changsha 410100，Hunan，China
夏毅敏（1967-），男，博士，教授，主要从事大型掘进装备设计及液压驱动与控制研究。E-mail:xiaymj@csu.edu.cn

Received date: 2022-10-09

  Online published: 2023-03-30

Supported by

the National Key R&D Program of China(2020YFB2007101);the Major of Science and Technology in Hunan Province-top 10 Key Technology Projects(2021GK1070)

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Abstract

In the working process of large-scale construction machinery such as excavators and shield machines, due to the complex working conditions and changeable environment, the hydraulic system power component axial piston pump of large displacement has greater hydraulic impact than the conventional piston pump, and it causes greater flow pulsation and pressure pulsation. In order to reduce the flow and pressure pulsation of axial piston pump of large displacement under excavation, shield and other working conditions, reduce the impact damage of oil medium on downstream components, and provide theoretical guidance for selecting oil medium methods, this paper built a mathematical model of oil dynamic viscosity, density and bulk elastic modulus based on the influence of temperature field. On this basis, a mathematical model of piston pump with solid-liquid-temperature coupling was established. ADAMS and AMESim software were used to complete the joint simulation of 750 mL/r piston pump under the coupling of solid-liquid-temperature, and the variation law of flow pulsation and pressure pulsation of piston pump under different temperature was obtained. The influence of oil temperature on the pressure pulsation of the piston pump was investigated by the whole pump test, and the correctness of the solid-liquid-temperature coupling simulation model of the 750 mL/r piston pump was verified. According to the three characteristics of oil, the orthogonal test method and the single factor analysis method were used to consider their influence degree and influence law on the flow pulsation rate of the piston pump, respectively. The results show that the outlet flow pulsation and pressure pulsation of the piston pump increase with the increase of temperature. Under the set condition, the influence of oil bulk modulus on flow pulsation rate is 97.19%, the density is 2.03%, and the dynamic viscosity is 0.78%. In order to reduce the influence of oil characteristics on the pulsation rate of piston pump outlet, hydraulic oil with larger bulk modulus and smaller density should be selected.

Key words： axial piston pump; oil characteristics; flow pulsation; dynamics; temperature field

Cite this article

XIA Yimin, LI Zhenghui, TAN Shunhui, et al. . Influence of Oil Characteristics on Flow Pulsation of Axial Piston Pump of Large Displacement Under Solid-Liquid-Temperature Coupling[J]. Journal of South China University of Technology(Natural Science), 2023 , 51(9) : 44 -55 . DOI: 10.12141/j.issn.1000-565X.220651

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