Performance Analysis of a Two-Stage Electrohydraulic Servovalve in Centrifugal Force Field

[+] Author and Article Information
Y. B. He, P. S. K. Chua, G. H. Lim

School of Mechanical Production Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore

J. Fluids Eng 125(1), 166-170 (Jan 22, 2003) (5 pages) doi:10.1115/1.1516573 History: Received January 23, 2001; Revised May 29, 2002; Online January 22, 2003
Copyright © 2003 by ASME
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Configuration principium drawing of a two-stage electrohydraulic servovalve. 1: flexure tube, 2: nozzle, 3: feedback spring, 4: inlet orifice, 5: spool, 6: magnet, 7: armature, 8: polepiece.
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Sketch of the double nozzle flapper valve. 1: nozzle, 2: flapper, 3: nozzle.
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Torque and forces on the armature/flapper assembly
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Sketch of an electrohydraulic test stand on a centrifuge. 1: centrifuge spindle, 2: counterweight, 3: rotary joints, 4: return line, 5: electrohydraulic servovalve, 6: test stand, 7: hydraulic actuator, 8: in line, 9: centrifuge arm, 10: hydraulic pump, 11: oil tank
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Experimental data and calculated results of double nozzle-flapper valves




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