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Conference paper

Design of Over Center Valves Based on Predictable Performance

In Proceedings of Asme Intl Mechanical Engineering Congress Imece´04 — 2004, pp. 1-7
From

Engineering Design and Product Development, Department of Mechanical Engineering, Technical University of Denmark1

Department of Mechanical Engineering, Technical University of Denmark2

A typical oil hydraulic over center valve system and a time domain simulation model is introduced together with a hypothesis that flow force compensation should reduce the inherent oscillatory behavior of such hydraulic systems. A few results are shown from a parameter study that confirms this assumption and an approach to design over center valve geometries that have negative flow forces is presented with emphasis on predictability.

In conclusion it is made clear that negative flow forces in the over center valve cannot solve the instability problem in general, however, it might very well be a method like lowering the pilot ratio, that can be used to application specific instability problems.

Language: English
Publisher: The American Society of Mechanical Engineers (ASME)
Year: 2004
Pages: 1-7
Proceedings: ASME International Mechanical Engineering Congress IMECE´04
Journal subtitle: Fluid Power Systems and Technolgy
ISBN: 0791841790 and 9780791841792
Types: Conference paper

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