NDLI: Experimental Methods for Measuring the Viscous Friction Coefficient in Hydraulic Spool Valves

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Experimental Methods for Measuring the Viscous Friction Coefficient in Hydraulic Spool Valves

Content Provider	MDPI
Author	Rundo, Massimo Casoli, Paolo Lettini, Antonio
Copyright Year	2021
Description	In hydraulic components, nonlinearities are responsible for critical behaviors that make it difficult to realize a reliable mathematical model for numerical simulation. With particular reference to hydraulic spool valves, the viscous friction coefficient between the sliding and the fixed body is an unknown parameter that is normally set a posteriori in order to obtain a good agreement with the experimental data. In this paper, two different methodologies to characterize experimentally the viscous friction coefficient in a hydraulic component with spool are presented. The two approaches are significantly different and are both based on experimental tests; they were developed in two distinct laboratories in different periods of time and applied to the same flow compensator of a pump displacement control. One of the procedures was carried out at the Fluid Power Research Laboratory of the Politecnico di Torino, while the other approach was developed at the University of Parma. Both the proposed methods reached similar outcomes; moreover, neither method requires the installation of a spool displacement transducer that can significantly affect the results.
Starting Page	7174
e-ISSN	20711050
DOI	10.3390/su13137174
Journal	Sustainability
Issue Number	13
Volume Number	13
Language	English
Publisher	MDPI
Publisher Date	2021-06-25
Access Restriction	Open
Subject Keyword	Sustainability Mechanical Engineering Hydraulic Spool Valve Viscous Friction Load Sensing Control
Content Type	Text
Resource Type	Article

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