Pressure compensation using flow forces in a multi-section proportional directional control valve

Lisowski, E.; Filo, Grzegorz; Rajda, Janusz

doi:10.1016/j.enconman.2015.07.038

Cited by 58 publications

(39 citation statements)

References 17 publications

(22 reference statements)

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“…Earlier studies conducted by the authors of this article also concerned the CFD flow analysis of a solenoid-operated directional spool control valve [18] as well as a multi-section proportional directional control valve [19]. This article presents the results of further studies which concern the possibility of increasing the range of linear flow regulation.…”

Section: Introductionmentioning

confidence: 94%

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CFD analysis of the characteristics of a proportional flow control valve with an innovative opening shape

Lisowski

Filo

2016

Energy Conversion and Management

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Section: Introductionmentioning

confidence: 94%

“…to calculate the values of the flow forces acting on the spool. In earlier studies, this method has been used for pressure compensation in a multi-section proportional directional control valve [19]. The jet angle was calculated on the basis of the velocity distribution for each of the considered spool positions.…”

Section: Throttle Valve Jet Anglementioning

confidence: 99%

CFD analysis of the characteristics of a proportional flow control valve with an innovative opening shape

Lisowski

Filo

2016

Energy Conversion and Management

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“…In valves with complex geometry, jet angles are obtained based on the velocity vector field distribution from CFD simulation. Since the jet angle of the fluid is the function of spool position and does not depend on pressure difference (Lisowski et al, 2015), the arbitrary configuration of boundary conditions during CFD can be used in order to estimate the jet angle versus the spool angular position. It is noteworthy, that the jet angle in the considered rotary spool design highly depends on the location of a sink channel since it defines the direction of the fluid flow from the throttling orifices.…”

Section: Theoretical Analysismentioning

confidence: 99%

“…17. The method was used in a number of studies considering jet angles evaluation in flow control valves in order to determine flow forces acting on the valve's regulating elements (Lisowski and Filo, 2016), (Lisowski et al, 2015), (Amirante et al, 2007), (Wang et al, 2016). Distribution of the velocity vectors of the flow has been extracted from the series of spool positions.…”

mentioning

confidence: 99%

Evaluation of steady flow torques and pressure losses in a rotary flow control valve by means of computational fluid dynamics

Okhotnikov

Noroozi

Sewell

et al. 2017

International Journal of Heat and Fluid Flow

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In this paper, a novel design of a rotary hydraulic flow control valve has been presented for high flow rate fluid power systems. High flow rates in these systems account for substantial flow forces acting on the throttling elements of the valves and cause the application of mechanically sophisticated multi-staged servo valves for flow regulation. The suggested design enables utilisation of single-stage valves in power hydraulics operating at high flow rates regimes. A spool driver and auxiliary mechanisms of the proposed valve design were discussed and selection criteria were suggested. Analytical expressions for metering characteristics as well as steady flow torques have been derived. Computational fluid dynamics (CFD) analysis of steady state flow regimes was conducted to evaluate the hydraulic behaviour of the proposed valve. This study represents a special case of an independent metering concept applied to the design of power hydraulic systems with direct proportional valve control operating at flow rates above 150 litres per minute. The result gained using parametric CFD simulations predicted the induced torque and the pressure drops due to a steady flow. Magnitudes of these values prove that by minimising the number of spool's mobile metering surfaces it is possible to reduce the flow-generated forces in the new generation of hydraulic valves proposed in this study. Calculation of the flow jet angles was analytically verified by measuring the deflection of the velocity vector using flow velocity field distribution, obtained during visualisation of the results of CFD simulations. The derived calculation formulas can predict metering characteristics, values of steady flow torques and jet angles for the specified design and geometry of the suggested valve. The proposed novel structure of the flow control valve promises to attain improved controllability, reliability and efficiency of the hydraulic control units of heavy mobile machinery operating at high flow rates regimes.

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“…Modelling and simulation of pressure control valves is not an easy task even in case of the simplest structure valve. Modeling of these valves may be performed on many ways, using mathematical model which consists of equation of motion and general purpose simulation tool (Lisowski et al, 2015) or by the use of computational fluid dynamics (CFD) or by combining both tools. One of the unknown factor during modelling of pressure control valve are flow forces which are difficult to evaluate or predict during fluid flow.…”

Section: Introductionmentioning

confidence: 99%

Simulations of Safety Vales for Fluid Power Systems

Domagała

Momeni

Fabiś-Domagała

et al. 2019

System Safety: Human - Technical Facility - Environment

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Hydraulic power systems are widely used in heavy machinery. Safety of such a systems have a major importance due to the fact that any failure may cause environmental contamination or serious injury. One of the component which protects hydraulic drive systems against excessive rising of working pressure is a safety valve which aim is to maintain pressure in the systems below acceptable level. Pressure control valves which plays important role in a hydraulic systems may have very simple or complex structure. Even in case of the simplest structure of such valve modeling is not an easy task. The new quality in designing hydraulic valves bring CFD method and FSI (Fluid Structure Interaction) methods.

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Pressure compensation using flow forces in a multi-section proportional directional control valve

Cited by 58 publications

References 17 publications

CFD analysis of the characteristics of a proportional flow control valve with an innovative opening shape

CFD analysis of the characteristics of a proportional flow control valve with an innovative opening shape

Evaluation of steady flow torques and pressure losses in a rotary flow control valve by means of computational fluid dynamics

Simulations of Safety Vales for Fluid Power Systems

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