Modelling of an In-Line Bladder-Type Hydraulic Suppressor for Pressure Ripple Reduction in Positive Displacement Pumps

Positive displacement pumps are widely employed for their characteristics, but the pulsating flow they produce is a major and well-known drawback. To reduce the flow ripple produced by the pump, which in turn generates a pressure ripple, many methods have been investigated, from optimising the pump...

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Bibliographic Details
Published inMachines (Basel) Vol. 11; no. 6; p. 620
Main Authors Casoli, Paolo, Vescovini, Carlo Maria, Rundo, Massimo
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.06.2023
Subjects
Bladder
flow ripple
hydraulic accumulator
hydraulic noise suppressor
Hydraulics
Methods
Modelling
Nitrogen
positive displacement pump
Positive displacement pumps
Pressure effects
pressure ripple
Reduction
Reynolds number
Ripples
Unsteady flow
Working conditions
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Summary:Positive displacement pumps are widely employed for their characteristics, but the pulsating flow they produce is a major and well-known drawback. To reduce the flow ripple produced by the pump, which in turn generates a pressure ripple, many methods have been investigated, from optimising the pump geometrical features to the introduction of active and passive systems to the delivery side. A passive system that has demonstrated to be particularly effective is the in-line bladder-type hydraulic pulsation suppressor. This device, consisting of a bladder gas-charged accumulator with a singular geometry, has been the subject of several studies. This paper describes a model based on the lumped parameter method for simulating and predicting the reduction effect on the pressure ripple achieved by the hydraulic suppressor. To validate the model, an experimental study was conducted, which confirmed the good potential of the model proposed thanks to the good agreement between the modelling results and empirical data.
ISSN:2075-1702
2075-1702
DOI:10.3390/machines11060620