Dynamics of three stage high speed pulse valve

The structure of a three-stage high-speed pulse valve is introduced, its dynamic performances studied and its influencing factors discussed. The main valve and the secondary valve of the high-speed pulse valve are cone valves. Based on the structural analysis of the valve, the operating principle is investigated. The mathematical model of the dynamic performance of the system is built and simulation analysis is carried out. The action process of the high-speed pulse valve is studied by combining with experimental results, and the key factors influencing its dynamic performances are analyzed. The results indicate that the mode of the main spool action is controlled by the pilot and secondary valves of the high-speed pulse valve one after another, thus achieving a high-speed on-off response and a high flow capacity. The main valve diameter of the high-speed pulse valve is determined by the demand for flow while the secondary valve diameter is determined by the response requirement of the main valve. The response speed of the pilot valve limits the max response speed of the main valve. The volume of the backpressure chamber and the gap between spools need to be reduced. The high-speed pulse valve reaches a large flow area in the instantaneous moment of opening, with a response time less than 10 ms. The relationship between the valve flow area and flow requirement is self-adapted.