Resonant type piezoelectric stack pump with sliding valves

Abstract

The invention discloses a resonant type piezoelectric stack pump with sliding valves. The pump comprises a water inlet, a first end cover, the inlet sliding valve, a cymbal-shaped piezoelectric stack,a shell, a middle connecting pipe, a piston, a cylinder with a spiral groove, the outlet sliding valve, a second end cover and a water outlet. The two ends of the shell are sealed through the first end cover and the second end cover. The water inlet is formed in the first end cover, and the water outlet is formed in the second end cover. The inlet sliding valve, the middle connecting pipe, the piston and the outlet sliding valve which are fixedly connected are sequentially arranged in a space defined by the shell and the two end covers. The cymbal-shaped piezoelectric stack is stacked on themiddle connecting pipe in a sleeving manner. One end, away from the water inlet, of the cymbal-shaped piezoelectric stack is attached to the side face of a flange on the middle connecting pipe together, and the other end is attached to the first end cover together. The cymbal-shaped piezoelectric stack drives the piston to do reciprocating motion under driving of alternating voltage. The piezoelectric stack pump has the advantages that working frequency is high, lag of opening and closing of valve ports is avoided, and flow can be controlled precisely.

Description

technical field [0001] The invention belongs to the technical field of piezoelectric pumps, in particular to a resonant piezoelectric stack pump with a slide valve. 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 source, it has the advantages of small size, simple structure, high efficiency, convenient control, no electromagnetic interference, and low energy consumption. . It has been more and more applied and devel...

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 works at high frequency, and cannot be completely closed to generate backflow, the piezoelectric-driven reciprocating pump is used when the check valve is used for flow distribution. The flow bottleneck problem has been unable to meet the occasions that require fast response, high precision and high pressure

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