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Article

Influence of Fluid Compressibility and Movements of the Swash Plate Axis of Rotation on the Volumetric Efficiency of Axial Piston Pumps

Faculty of Mechanical Engineering and Ship Technology, Gdansk University of Technology, 80-233 Gdansk, Poland
Academic Editor: Wencheng Guo
Energies 2022, 15(1), 298; https://doi.org/10.3390/en15010298
Received: 24 November 2021 / Revised: 23 December 2021 / Accepted: 31 December 2021 / Published: 2 January 2022
This paper describes the design of a swash plate axial piston pump and the theoretical models describing the bulk modulus of aerated and non-aerated fluids. The dead space volume is defined and the influence of this volume and the fluid compressibility on the volumetric efficiency of the pump is considered. A displacement of the swash plate rotation axis is proposed to reduce the dead space volume for small swash plate swing angles. A prototype design of a pump with a displaced axis of rotation of a swash plate with two directions of delivery is presented, in which the capacity is changed by means of a valve follow-up mechanism. Comparative results for a pump with a displaced and a non-displaced swash plate rotation axis are presented, which confirm that displacement of the swash plate rotation axis causes an increase in volumetric efficiency that is apparent for high pressure discharge and small swash plate angles. The determined characteristics were compared with a mathematical model taking into account the compressibility of the fluid in the dead space volume and a satisfactory consistency was obtained. View Full-Text
Keywords: hydraulic pump; axial piston pump; volumetric efficiency; fluid bulk modulus hydraulic pump; axial piston pump; volumetric efficiency; fluid bulk modulus
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MDPI and ACS Style

Załuski, P. Influence of Fluid Compressibility and Movements of the Swash Plate Axis of Rotation on the Volumetric Efficiency of Axial Piston Pumps. Energies 2022, 15, 298. https://doi.org/10.3390/en15010298

AMA Style

Załuski P. Influence of Fluid Compressibility and Movements of the Swash Plate Axis of Rotation on the Volumetric Efficiency of Axial Piston Pumps. Energies. 2022; 15(1):298. https://doi.org/10.3390/en15010298

Chicago/Turabian Style

Załuski, Paweł. 2022. "Influence of Fluid Compressibility and Movements of the Swash Plate Axis of Rotation on the Volumetric Efficiency of Axial Piston Pumps" Energies 15, no. 1: 298. https://doi.org/10.3390/en15010298

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