Characteristics of delivery pressure in the axial piston pump with combination of variable displacement and variable speed

Huang, Jiahai; Yan, Zheng; Quan, Long; Yuan, Liang; Gao, Youshan

doi:10.1177/0959651815578967

Cited by 18 publications

(21 citation statements)

References 19 publications

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“…Oil outlet those obtained by simulation, which may be attributed to the hydraulic system affecting the results of pressure ripple [29]. From the above analysis, the following summary can be made: The prototype pump has high volumetric efficiency and power density.…”

Section: Oil Inletmentioning

confidence: 95%

Study of flow ripple characteristics in an innovative two-dimensional fuel piston pump

Shentu

Ruan

Qian

et al. 2019

J Braz. Soc. Mech. Sci. Eng.

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To meet the requirements of fuel pumps with high efficiency, high power density, and low flow ripple for modern advanced aircraft, we hereby propose a two-dimensional piston pump (called 2D pump). A single piston with both rotary and linear motions is used to combine the flow distributing and volumetric varying functions together. The leakage spots are reduced to the clearance between the piston and the cylinder. As the radial force of the piston is balanced, a small piston clearance is selected to reduce leakage. Furthermore, a 2D tandem pump formed by two 2D pump units connected in series was introduced to eliminate the geometric flow ripple. The flow ripple characteristics were studied through analytical techniques, CFD numerical methods, and experiments. The results show that the flow ripple of 2D pump obtained by the measured pressure wave is 6.3%, while the pump has a high volumetric efficiency of up to 96% within a speed range of 1000-8000 r/min, indicating that reducing the leakage increases the average actual flow and reduces the flow ripple. Therefore, the proposed 2D pump is suitable for modern advanced aircraft.

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Section: Oil Inletmentioning

confidence: 95%

Study of flow ripple characteristics in an innovative two-dimensional fuel piston pump

Shentu

Ruan

Qian

et al. 2019

J Braz. Soc. Mech. Sci. Eng.

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“…For the instantaneous cylinder pressure, pki with respect to the angular position of the cylinder block, φ, with φ = ω•t and dφ = ω•dt, is given by Reference [12,13] …”

Section: The Mathematical Model Of Vappmentioning

confidence: 99%

Simulation Analysis and Experiment of Variable-Displacement Asymmetric Axial Piston Pump

et al. 2017

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Abstract:The variable displacement pump control system has greater energy-saving advantages and application prospects than the valve control system. However, the variable displacement pump control of differential cylinder is not concurrent with the existing technologies. The asymmetric pump-controlled cylinder is, therefore, used to balance the unequal volume flow through a single rod cylinder in closed-circuit system. This is considered to be an effective method. Nevertheless, the asymmetric axial piston pump (AAPP) is a constant displacement pump. In this study, variable-displacement asymmetric axial piston pump (VAPP) is investigated according to the same principle used in investigating AAPP. This study, therefore, aims at investigating the characteristics of VAPP. The variable-displacement output of VAPP is implemented by controlling the swash plate angle with angle feedback control circuit, which is composed of a servo proportional valve and an angular displacement sensor. The angular displacement sensor is connected to the swash plate. The simulation model of VAPP, which is set up through the ITI-SimulationX simulation platform, is used to predict VAPP's characteristics. The purpose of implementing the experiment is to verify the theoretical results. Both the simulation and the experiment results demonstrated that the swash plate angle is controlled by a variable mechanism; when the swash plate angle increases, the flow of Port B and Port T increases while the response speed of Port B and Port T also accelerates. When the swash plate angle is constant, the flow of Port B and Port T increases along with the increase of pump speed, although the pressure-response speed of Port B is faster than that of Port T. Consequently, the flow pulsation of Port B and Port T tends to decrease gradually along with the increase of pump speed.

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“…In recent years, Huang et al. 25 numerically and experimentally investigated the pressure ripple characteristics of the variable displacement pump under different swash plate angles and rotational speeds. For the purpose of decreasing the pressure gradient of an axial piston pump, Shi et al.…”

Section: Introductionmentioning

confidence: 99%

Effect analysis of silencing grooves on pressure and vibration characteristics of seawater axial piston pump

Yin

Nie

Hou

et al. 2016

Proceedings of the Institution of Mechanical Engineers, Part C:

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Seawater axial piston pump is a critical power component in seawater fluid power system. As the properties of high bulk modulus and low viscosity of seawater, the pressure and vibration characteristics of the seawater axial piston pump will be getting poorer than the traditional oil pump. In this study, the pressure, flow, and vibration characteristics for a seawater axial piston pump are investigated. The three-dimensional computational fluid dynamics simulations for the port plate with non-grooved, U-shaped, and triangle-based pyramid silencing groove designs have been conducted over a range of operating conditions, which consider the fluid compressibility effect and cavitation damage. Measurements of pressure ripple and pump vibration are carried out at various loading conditions to verify the results of simulation. The experiment turned out that the well-designed port plate can mitigate both pressure ripples as well as vibrations of the pump. This research will lay the foundation for the further development of a low fluid noise seawater axial piston pump.

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Characteristics of delivery pressure in the axial piston pump with combination of variable displacement and variable speed

Cited by 18 publications

References 19 publications

Study of flow ripple characteristics in an innovative two-dimensional fuel piston pump

Study of flow ripple characteristics in an innovative two-dimensional fuel piston pump

Simulation Analysis and Experiment of Variable-Displacement Asymmetric Axial Piston Pump

Effect analysis of silencing grooves on pressure and vibration characteristics of seawater axial piston pump

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