A Study of Flow Force on a Spool Valve

Tanaka, Kazuhiro; Tomioka, Kouki; Shimizu, Fumio; Fuchiwaki, Masaki

doi:10.5739/jfps.42.13

Cited by 2 publications

(3 citation statements)

References 1 publication

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“…In the research reports listed in section I [3][4][5][6][7][8][9][10][11][12] and the textbooks [1,2] on hydraulic control systems, the flow force in servovalves is described to be a symptom that should be reduced as small as possible. However, the degree of the harmful effects of it on the valve performances is not described in detail.…”

Section: Effects Of the Flow Force On The Valve Performances (Simumentioning

confidence: 99%

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Effects of flow force on the characteristics of electrohydraulic servovalves

Istanto

Kim

et al. 2015

2015 International Conference on Automation, Cognitive Science, Optics, Micro Electro-Mechanical System, and Information Techno

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In this study, the effects of flow force applied to the spool in electrohydraulic servovalve on the valve's performances are investigated. First, experiments investigating flow force in an electrohydraulic servovalve is conducted, and various physical parameters of the servovalve are measured. Then, a simulation program for the valve was developed based on the full mathematical model of the servovalve, using the measured physical parameters' values and the experimental results on the flow force. The effects of the flow force on the valve performances are described in detail based on the simulation results.

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Section: Effects Of the Flow Force On The Valve Performances (Simumentioning

confidence: 99%

“…Flow force has been calculated from the mathematics model in [6,7]. Simulation of flow force using computation fluid dynamic, CFD, had been done in [8].…”

Section: Introductionmentioning

confidence: 99%

Effects of flow force on the characteristics of electrohydraulic servovalves

Istanto

Kim

et al. 2015

2015 International Conference on Automation, Cognitive Science, Optics, Micro Electro-Mechanical System, and Information Techno

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“…Usually, the outlet angle is considered to be 90° for the calculation of the steady-state flow-force (hereinafter referred to as flow force) [3]. However, Ye [4] claims that the outlet angle deviates from that value and Schrank [5], Tanaka [6], Lugowski [7], and Non-reviewed paper. SICFP -June Linköping, Sweden…”

Section: Figure 1: Experimental Setup By Von Misesmentioning

confidence: 99%

Analysis of Flow Angles and Flow Velocities in Spool Valves for the Calculation of Steady-State Flow Forces

Bordovsky

Murrenhoff

2017

Linköping Electronic Conference Proceedings

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A detailed analysis of the flow inside valves has become necessary for the optimisation of their static and dynamic performance. For this purpose, the contours of metering edges as well as the shapes of sleeves, respectively of valve blocks, can be modified, resulting in different flow patterns. In addition, the flow velocities and flow angles on defined areas inside valves are needed for the estimation of physical quantities such as flow rates, flow forces, etc.Within this paper, measurements and CFD-simulations of a 2/2-way spool type test valve are analysed regarding flow angles and flow velocities including their distribution on the inlet and outlet areas. Different spool edge geometries are investigated in both flow directions. Furthermore, the impact of a chamfer and a fillet on a spool edge, on the flow angles and the flow velocities are analysed.The analysis results show that the shape of a spool edge influences the flow angles and the flow velocities. Both flow variables are significantly affected by the direction of the fluid flow through the valve. Moreover, considering the same inlet area, an increasing chamfer width, respectively an increasing fillet radius, result both in lower inlet and outlet flow angles.

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A Study of Flow Force on a Spool Valve

Cited by 2 publications

References 1 publication

Effects of flow force on the characteristics of electrohydraulic servovalves

Effects of flow force on the characteristics of electrohydraulic servovalves

Analysis of Flow Angles and Flow Velocities in Spool Valves for the Calculation of Steady-State Flow Forces

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