Research and Design of a Nearly Non-Friction Pneumatic Jetting Dispenser with Air Floating Structure

In order to reduce the frictional heating of pneumatic dispensers and improve the frequency of pneumatic dispensers, a method of fast driving with near zero frictional pressure based on the principle of air floating is proposed, and a new kind of high frequency pneumatic dispenser with air floating structure is developed. Based on the analysis of the principle of air floating and the mechanism of fluid injection, the mathematical model of the new pneumatic dispenser with near-zero friction have been established. And a series of experiments have been performed, as experimental results corresponded with that of the mathematical model, the reliability of the design calculation was proved. The air floating structure reduced the friction between the piston and cylinder wall, making the steady-state temperature of the pneumatic dispenser significantly lower than that of the traditional pneumatic dispensers, which solved the problem of O-ring wear failure after a long time of work, improved the working efficiency and the dynamic performance of the pneumatic dispenser.