Efficient Pressure Control Nozzle - Flapper Mechanism with Isothermal Chamber using Piezoelectric Actuator

This paper is presenting a new nozzle–flapper mechanism with isothermal chamber using piezoelectric actuator to control precisely the pressure. A mathematical simulation has been carried out and the effectiveness of the new design structure is verified by comparing experimental and simulated results. This comparison verifies the influence of isothermal chamber and piezoelectric actuator on the dynamic behavior of the pressure fluctuation in control chamber of the nozzle– flapper mechanism. The experimental data are in good agreement with the simulation results. The developed simulation can be used to design and select important dimensions of NF mechanism such as orificediameters or the nozzles, also to predict static and dynamic behavior of NF mechanism before manufacturing it. This research highlights that the designed structure is a rapid and fast method of controlling pressure, so it can be used to control pressure directly, or it can be used in the pilot stage valve to actuate the main stage of a much bigger pneumatic valve separately.

کلیدواژه ها:

Nozzle- Flapper (NF) Mechanism ، Isothermal Chamber ، Piezoelectric Actuator ، Pressure Control