A Piezoelectric Pump Based on Resonant Differential Displacement Amplification

Abstract

The invention discloses a piezoelectric pump based on resonance differential displacement amplification, which includes a housing, the two ends of the housing are sealed by a front end cover and a rear end cover, fluid flows in from the front end cover side, and flows out from the rear end cover side; In the space enclosed by the body and two end covers, the first piezoelectric actuator, piston, spring and piston cylinder form the first spring mass damping system, driven by the first piezoelectric actuator, the first spring mass is forced to The damping system generates resonance; the second piezoelectric actuator, transducer, piston cylinder and piston form a second spring mass damping system, driven by the second piezoelectric actuator, the transducer is forced to resonate, and the transducer Drive the piston cylinder nested in it to reciprocate; the first piezoelectric actuator and the second piezoelectric actuator have the same driving voltage frequency, and the phase difference of the driving voltage is zero, so that the vibration frequency of the piston and the piston cylinder is consistent, resulting in resonance Differential displacement amplification. The invention has compact structure, is suitable for high-frequency working occasions, has high output pressure, large flow rate and low energy consumption.

Description

technical field [0001] The invention belongs to the technical field of piezoelectric pumps, in particular to a piezoelectric pump based on resonance differential displacement amplification. Background technique [0002] With the rapid development of piezoelectric smart materials, piezoelectric pumps, as key components in the fluid delivery process, have attracted increasing attention since the 1970s. The piezoelectric pump is a new type of fluid pump that uses the inverse piezoelectric effect of piezoelectric ceramics to deform the piezoelectric vibrator, and then the volume change of the pump chamber is generated by the deformation to achieve fluid output. Because the piezoelectric pump has no motor and no rotating parts in the working process, and only uses piezoelectric ceramics as its power drive source, it has the advantages of small size, simple structure, high efficiency, convenient control, no electromagnetic interference, and low energy consumption. , has been more...

AI Technical Summary

Problems solved by technology

However, due to the small deformation of a single piezoelectric ceramic piece, and the ordinary check valve will lag behind when the piezoelectric pump is working at high frequency, and cannot be completely closed to generate backflow. The flow bottleneck problem has been unable to meet the occasions that require fast response, large flow, high precision and high pressure

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