Dynamic Model for a Dome-Loaded Pressure Regulator

[+] Author and Article Information
A. Nabi, E. Wacholder

Rafael–Israel Armament Development Authority, P.O. Box 2250, Haifa, 31021, Israel

J. Dayan

Technion–Israel Institute of Technology, Mechanical Engineering Faculty, Haifa, 32000, Israele-mail: merdayan@tx.technion.ac.il

J. Dyn. Sys., Meas., Control 122(2), 290-297 (Dec 17, 1997) (8 pages) doi:10.1115/1.482464 History: Received December 17, 1997
Copyright © 2000 by ASME
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Schematics of gas DLPR and experimental arrangements
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The schematic force diagram and main nomenclature for the DLPR, (a) Forces acting on the poppet and on the control piston, (b) Poppet’s schematic diagram.
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Simulation of regulator reaction to a 60.5 bar step change in command pressure (inlet pressure 122 bar). Run conditions: α=0.8,β=0.4,f=100 N,dc=1.06 mm,d1=d3=4 mm,Fs=3800 N.
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Empirical correlation for the correction factors α and β as function of outlet to inlet pressure ratio assuming α=β
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Regulator response in run no. 2 for command pressure of 60.5 bar and needle valve openings of 1.06 mm. Run 2 conditions: Pνo=60.5 bar,Ps=122 bar,dc=1.06 mm.
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Regulator dynamics at low command pressures of 20 bar for run no. 6. Run 6 conditions: Pνo=20 bar,Ps=114 bar,dc=1.06 mm.
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Dynamic response of the regulator for a dc=2 mm command-orifice diameter
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The effect of changing the size of the equalizing holes (d1=d3=2 mm)
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Cross comparison of the various parameter effects on regulator dynamics as a function of the restriction opening, dc. (a) Dependence of overshoot in poppet movement on dc for different initial spring loading and pressure equalizing holes. (b) Overshoot in outlet pressure, Po, as function of dc for various sizes of the pressure equalizing holes and for different supply pressures. (c) Settling time as a function of dc.
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Effect of variable correction factors α and β (Fig. 4) on the model predictions for conditions in run 2



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