Rudolf Scheidl, Christoph Gradl, Andreas Plöckinger,
"The Cushioning Groove for Solenoid Switching Valves - Concept and Theoretical Analysis"
, in The Japan Fluid Power System Society, in JFPS International Journal of Fluid Power System, Vol. (accepted for publication), 12-2014, ISSN: 1881-5286
The Cushioning Groove for Solenoid Switching Valves - Concept and Theoretical Analysis
Sprache des Titels:
A proper cushioning of the spool and armature of a switching valve at the end stops is important for a high lifetime and a low impact sound. Squeeze gap concepts are often employed. Oil between two basically parallel surfaces, which come into contact and which form the mechanical end stop, provides an excellent damping mechanism. But this oil film may exhibit high stiction forces, which cause a high response delay or even a total failure of the valve, unless cavitation in the oil film limits the stiction force. A new cushioning concept based on a notched groove is presented in this paper. Its basic functional principle is studied by compact mathematical models. The basic differences to squeeze gap cushioning are worked out and basic dimensioning rules are derived. This concept overcomes the stiction force problem fully.
Sprache der Kurzfassung:
JFPS International Journal of Fluid Power System
(accepted for publication)
Anzahl der Seiten:
Aufsatz / Paper in sonstiger referierter Fachzeitschrift