CFD Analysis of a Pressure Compensator for Variable Displacement Pumps

Rundo, Massimo; Fresia, Paola

doi:10.14264/44f591d

Cited by 2 publications

(1 citation statement)

References 10 publications

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“…The CFD model of the valve was built with the commercial software FloEFD 2019.1 embedded in SolidEdge ® . The same tool has been successfully used by the authors for the simulation of a small control valve of a displacement control [17]. FloEFD discretizes the governing equations with the finite volume method and automatically recognizes as fluid volume the enclosed region of the CAD geometry, hence it is necessary to close all open ports by means of "lids".…”

Section: Simulation Models 41 Cfd Modelmentioning

confidence: 99%

CFD Simulation of a Post-Compensated Load Sensing Directional Control Valve

Fresia

Rundo

2021

E3S Web Conf.

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The paper presents the CFD model of a load sensing directional control valve. The model was validated experimentally in terms of pressure drop and flow force at different positions of the spool. The spool position was imposed manually by means of a micrometric screw and a load cell was used for measuring the flow force. The CFD model was developed with the CAD-embedded tool FloEFD®. The model has been proved to be very reliable in estimating the pressure drop, moreover quite good results were obtained also in the evaluation of the flow force. The CFD simulations were used to tune the coefficients of a lumped parameter model of the valve, so that such a model can be efficiently used for the simulation of an entire hydraulic circuit. Moreover, the CFD model has been used as design tool for attenuating the detrimental effect of the flow force. In particular, the width of the land upstream of the metering edge has an influence on the resultant force on the spool. If was found that it is possible to significantly reduce the flow force at maximum opening with a relatively small increment of the pressure drop across the valve.

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Section: Simulation Models 41 Cfd Modelmentioning

confidence: 99%

CFD Simulation of a Post-Compensated Load Sensing Directional Control Valve

Fresia

Rundo

2021

E3S Web Conf.

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Lumped parameter model and experimental tests on a pressure limiter for variable displacement pumps

Fresia

Rundo

2020

E3S Web Conf.

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The paper presents the lumped parameter model of a pressure limiter for axial piston pumps developed in the Simcenter Amesim® environment. The control includes both the absolute and differential (load sensing) pressure limiter in a single body. The continuous position valve was tested experimentally alone on a test rig in order to estimate the discharge coefficients required for tuning the model. The tests were performed at imposed positions of the spool and the corresponding modulated pressure and control flow through the valve were measured. A contactless transducer was used for measuring with a very high accuracy the spool position. The influence of the bleed orifice on the pressure gain was also measured experimentally. It was found that the discharge coefficients have a significant influence on the hydraulic characteristic of the valve with also a consequence on the dynamic behavior of the entire displacement control.

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CFD Analysis of a Pressure Compensator for Variable Displacement Pumps

Cited by 2 publications

References 10 publications

CFD Simulation of a Post-Compensated Load Sensing Directional Control Valve

CFD Simulation of a Post-Compensated Load Sensing Directional Control Valve

Lumped parameter model and experimental tests on a pressure limiter for variable displacement pumps

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