"Development of a Fast Low-cost Switching Valve for Big Flow Rates"
, in E C Macià, M K Shahin: Proceedings of the 3rd FPNI-PhD Symposium on Fluid Power, Terrassa, Spain, 2004, Seite(n) 599-606, 7-2004, ISBN: 84-609-1354-6
Development of a Fast Low-cost Switching Valve for Big Flow Rates
Sprache des Titels:
Proceedings of the 3rd FPNI-PhD Symposium on Fluid Power, Terrassa, Spain, 2004
Advancements of hydraulic systems are necessary to keep them competitive with other drive systems.
Two major topics for further improvements in hydraulics are energy efficiency and cost reduction. High accuracy and fast systems, for instance for fast and precise positioning tasks, mostly can only be realized by the use of servo valves. Such valves are costly and, moreover, their working is based on the resistance principle, which causes considerable losses. A promising method to achieve the mentioned goals is the use of fast, high flow rate and low-cost switching valves. Former investigations showed that switching valves with flow rates of about 100 l/min at 5 bar, switching times of 1ms and a price of about 100€ in fullproduction run can meet these requirements. Commercial switching valves do not fulfill such demands.
We developed a switching valve which fulfills the mentioned requirements on switching time, flow rate,
and which has the potential to achieve a low price in full-production run. The valve spool is driven by a
solenoid via a special transmission. The high flow rate was realized by a simple arrangement of several metering edges. In the course of its development we solved problems of unstable centered spool position.
Its quite simple configuration is the main ingredient for a low prize in full-production run.