Its pump cover, pump chamber, inlet tube and outlet tube, and the cymbal grille are shaped by 3D printing photosensitive resin material.
Then, the piezoelectric vibrator, pump chamber, and diffuser and nozzle were packaged together in turn to form a valveless piezoelectric micro-pump with cone-shaped tubes.
A separate unit of series-connected structure, including a group of flow tubes, piezoelectric vibrator and pump chamber, still exhibits phenomenon of vibration, and the flow in the lower level of separate unit vibrates and shocks more severely than that in the upper level.
The motor in the pump unit is supposed to follow a sine wave with amplitude up to 9 mm to alternatingly empty the left and right pump chamber.
Table 2 Geometrical parameters of vibrator mm Parameter name Diameter of PZT d 1 Thickness of PZT h 1 Diameter of copper d 2 Thickness of copper h 2 Value 25 0.2 50 0.2 Table 3 Geometrical parameters of pump chamber, diaphragm and grille mm Parameter name Diaphragm thickness h 3 Grille thickness h 4 Chamber diameter d 3 Chamber depth h 5 Value 0.2 0.2 40.2.5.
Each pump chamber was covered with a piezoelectric vibrator.
Under the pressure difference between inside and outside of the pump chamber, the fluid in the inlet tube will flow into the pump chamber via grille and diaphragm.
Under the pressure difference between inside and outside of the pump chamber, the fluid near the outlet tube will flow out of the pump chamber via the valve.
They share a same pump chamber and a same driving source.
The experimental procedure begins by loading CO2 into the syringe pump chamber.
(1) Suppose that the piezoelectric oscillator is bounded on the pump chamber.
