Crank-slider spool valve for switch-mode circuits

Alexander C. Yudell, Shaun E. Koktavy, James D. Van De Ven

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

A key component of switch-mode hydraulic circuits is a highspeed two-position three-way valve with a variable duty cycle. This paper presents a new valve architecture that consists of two valve spools that are axially driven by crank-slider mechanisms. By phase shifting the two crank links, which are on a common crankshaft, the duty cycle of the valve is adjusted. The two spools split and re-combine flow such that two switching cycles occur per revolution of the crankshaft. Because the spools move in a near-sinusoidal trajectory, the peak spool velocities are achieved at mid-stroke where the valve land transitions across the ports, resulting in short valve transition times. The spool velocity is lower during the remainder of the cycle, reducing viscous friction losses. A dynamic model is constructed of this new valve operating at 120 Hz switching frequency in a switch-mode circuit. The model is used to illustrate design trade-offs and minimize energy losses in the valve. The resulting design solution transitions to the onstate in 5% of the switching period and the combined leakage and viscous friction in the valve dissipate 1.7% of the total power at a pressure of 34.5MPa and volumetric flow rate of 22.8L/min.

Original languageEnglish (US)
Title of host publicationASME/BATH 2015 Symposium on Fluid Power and Motion Control, FPMC 2015
PublisherAmerican Society of Mechanical Engineers
ISBN (Electronic)9780791857236
DOIs
StatePublished - Jan 1 2015
EventASME/BATH 2015 Symposium on Fluid Power and Motion Control, FPMC 2015 - Chicago, United States
Duration: Oct 12 2015Oct 14 2015

Publication series

NameASME/BATH 2015 Symposium on Fluid Power and Motion Control, FPMC 2015

Other

OtherASME/BATH 2015 Symposium on Fluid Power and Motion Control, FPMC 2015
CountryUnited States
CityChicago
Period10/12/1510/14/15

Fingerprint

Reels
Switches
Networks (circuits)
Crankshafts
Friction
Switching frequency
Dynamic models
Energy dissipation
Trajectories
Flow rate
Hydraulics

Cite this

Yudell, A. C., Koktavy, S. E., & Van De Ven, J. D. (2015). Crank-slider spool valve for switch-mode circuits. In ASME/BATH 2015 Symposium on Fluid Power and Motion Control, FPMC 2015 (ASME/BATH 2015 Symposium on Fluid Power and Motion Control, FPMC 2015). American Society of Mechanical Engineers. https://doi.org/10.1115/FPMC2015-9606

Crank-slider spool valve for switch-mode circuits. / Yudell, Alexander C.; Koktavy, Shaun E.; Van De Ven, James D.

ASME/BATH 2015 Symposium on Fluid Power and Motion Control, FPMC 2015. American Society of Mechanical Engineers, 2015. (ASME/BATH 2015 Symposium on Fluid Power and Motion Control, FPMC 2015).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Yudell, AC, Koktavy, SE & Van De Ven, JD 2015, Crank-slider spool valve for switch-mode circuits. in ASME/BATH 2015 Symposium on Fluid Power and Motion Control, FPMC 2015. ASME/BATH 2015 Symposium on Fluid Power and Motion Control, FPMC 2015, American Society of Mechanical Engineers, ASME/BATH 2015 Symposium on Fluid Power and Motion Control, FPMC 2015, Chicago, United States, 10/12/15. https://doi.org/10.1115/FPMC2015-9606
Yudell AC, Koktavy SE, Van De Ven JD. Crank-slider spool valve for switch-mode circuits. In ASME/BATH 2015 Symposium on Fluid Power and Motion Control, FPMC 2015. American Society of Mechanical Engineers. 2015. (ASME/BATH 2015 Symposium on Fluid Power and Motion Control, FPMC 2015). https://doi.org/10.1115/FPMC2015-9606
Yudell, Alexander C. ; Koktavy, Shaun E. ; Van De Ven, James D. / Crank-slider spool valve for switch-mode circuits. ASME/BATH 2015 Symposium on Fluid Power and Motion Control, FPMC 2015. American Society of Mechanical Engineers, 2015. (ASME/BATH 2015 Symposium on Fluid Power and Motion Control, FPMC 2015).
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