Axial piston pump grooved slipper analysis by CFD simulation of three-dimensional NVS equation in cylindrical coordinates

Kumar, Sushil; Bergadà, Josep M.; Watton, J.

doi:10.1016/j.compfluid.2008.06.007

Cited by 67 publications

(40 citation statements)

References 28 publications

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“…Ivantysynova and Huang (2005) studied the suction flow condition of a bent axis axial piston pump using CFD, and Rokala, Koskinen, Calonius, and Pietola (2008) analyzed the flow condition both in axial piston pumps and gear pumps using CFD software. Kumar, Bergada, and Watton (2009) conducted research on the static and dynamic characteristics of a piston pump slipper with a groove. In addition, they also built a test rig to compare experimental and CFD results.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the flow dynamics characteristics of an axial piston pump based on the computational fluid dynamics method

Zhang

Hong

et al. 2016

Engineering Applications of Computational Fluid Mechanics

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Fang (2017) Analysis of the flow dynamics characteristics of an axial piston pump based on the computational fluid dynamics method, Engineering Applications of Computational Fluid Mechanics, 11:1, 86-95, DOI: 10.1080/19942060.2015 ABSTRACTTo improve its working performance, the flow ripple characteristics of an axial piston pump were investigated with software which uses computational fluid dynamics (CFD) technology. The simulation accuracy was significantly optimized through the use of the improved compressible fluid model. Flow conditions of the pump were tested using a pump flow ripple test rig, and the simulation results of the CFD model showed good agreement with the experimental data. Additionally, the composition of the flow ripple was analyzed using the improved CFD model, and the results showed that the compression ripple makes up 88% of the flow ripple. The flow dynamics of the piston pump is mainly caused by the pressure difference between the intake and discharge ports of the valve plates and the fluid oil compressibility. ARTICLE HISTORY

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Section: Introductionmentioning

confidence: 99%

Analysis of the flow dynamics characteristics of an axial piston pump based on the computational fluid dynamics method

Zhang

Hong

et al. 2016

Engineering Applications of Computational Fluid Mechanics

View full text Add to dashboard Cite

show abstract

“…The effect of different dimensions and position and rotational speed of grooves on pressure, leakage, torque and force were also simulated. Results show that when modifying groove position, moving the groove towards the slipper inner pocket increases leakage and force acting over the slipper, while when the groove is positioned near the outer boundary of the slipper, decreasing the groove width increases the force on the slipper and decreases the leakage [3].…”

Section: Introductionmentioning

confidence: 96%

Design of Swashplate Axial Piston Machines Having Low Piston Transverse Forces

Elashmawy¹

2015

IJMEA

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Axial piston machine of swashplate type is the common design widely used for many hydraulic applications because of its simplicity, compact design and low cost. However, this simplicity has a negative effect for piston transverse forces which limits machine performance. The main target of this study is to investigate a feasible design of a fixed displacement swashplate contour in order to minimize piston transverse forces. The design should compensate the contact surface mechanism between swasplate and piston end. Piston slipper is replaced by a ball that is rotatably mounted within a ball socket formed at the piston end. The ball runs on a circumferential contour groove formed on the swashplate surface. The sliding friction between swashplate and slipper is replaced by a rolling friction between ball and circumferential runway groove. Primary results show a rough estimation of 30% reduction of piston transverse forces due to the cam action radial forces elimination. This reduction promises to enhance overall machine performance.

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“…While with positioning the groove near the outer slipper boundary, decreasing the groove width increases the slipper force and consequently decreases the leakage [9]. Later on a CFD is developed and enabled to deal with any number of grooves [10].…”

Section: Swashplate-slipper Pairmentioning

confidence: 99%

Computer Aided Design of Axial Piston Machines Having a Roller Piston Bearing

Elashmawy¹

2015

IJMEA

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Swashplate axial piston machines are simple, compact and low price. This simplicity is at the expense of piston transverse forces which limits machine characteristics. The aim of this study is to propose more effective developed design using roller piston bearing. Ball bearing was proposed to reduce transverse forces acting on the piston end of the axial piston machines. The proposed roller bearing design will provide line contact bearing between roller and cam contour compared to point contact of ball bearing arrangement. The roller runs on a flat surface contour formed on the swashplate which is simpler in manufacturing process. The sliding friction between swashplate and slipper is replaced by a rolling friction between roller and runway of cam surface contour. Results show the feasibility of the developed design. The proposed design promises to increase the pressure limitation of the ball bearing arrangement. Parameters such as piston displacement, cam action angle are the same for both roller and ball piston bearing. A comparison analysis was also performed between two alternative cam contours, sinusoidal and linear piston displacement. The selection criterion was based on piston transverse torque. Results show that sinusoidal piston displacement is much better choice than the linear one.

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Axial piston pump grooved slipper analysis by CFD simulation of three-dimensional NVS equation in cylindrical coordinates

Cited by 67 publications

References 28 publications

Analysis of the flow dynamics characteristics of an axial piston pump based on the computational fluid dynamics method

Analysis of the flow dynamics characteristics of an axial piston pump based on the computational fluid dynamics method

Design of Swashplate Axial Piston Machines Having Low Piston Transverse Forces

Computer Aided Design of Axial Piston Machines Having a Roller Piston Bearing

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