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Resonant piezoelectric pump working under power frequency

A resonant and piezoelectric pump technology, which is applied to pumps with flexible working elements, pumps, liquid variable capacitance machines, etc., can solve the problem of low electromechanical conversion efficiency of piezoelectric pumps, reduced service life of piezoelectric vibrators, and unfavorable piezoelectricity. Ceramic output impedance and pump chamber matching, to reduce complexity and cost, improve output capacity, and improve efficiency

Active Publication Date: 2019-08-06
HEFEI UNIV OF TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] When the existing piezoelectric pump is driven at power frequency, it works under quasi-static conditions, which is not conducive to the matching of the piezoelectric ceramic output impedance and the pump cavity, and at the same time, the electromechanical conversion efficiency of the piezoelectric pump driven by resonance is lower.
Working under quasi-static conditions, the piezoelectric vibrator needs to be in direct contact with the transmitted liquid, which reduces the service life of the piezoelectric vibrator

Method used

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  • Resonant piezoelectric pump working under power frequency
  • Resonant piezoelectric pump working under power frequency
  • Resonant piezoelectric pump working under power frequency

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Embodiment Construction

[0051] In order to make the objectives, technical solutions and advantages of the present invention clearer, the following technical solutions in the present invention will be described clearly and completely. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0052] Such as Figure 1-5 As shown, a resonant piezoelectric pump working at a power frequency of the present invention is composed of an excitation system and a pump body. The excitation system is composed of piezoelectric ceramic 1, tuning fork vibrator 2, mass block 3, bolt 5, The connector 6 and the oval connecting piece 7 are composed.

[0053] Such as figure 2 Piezoelectric ceramic 1 is divided into upper piezoelectric ceramic sheet 101 and lower piezoelec...

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Abstract

The invention provides a resonant piezoelectric pump working under the power frequency, and belongs to a piezoelectric resonance device. The resonant piezoelectric pump comprises a vibration excitingsystem consisting of piezoelectric ceramic, a tuning fork vibrator, a mass block, a bolt, a connector and an elliptic connecting piece, and a pump body consisting of an upper pump, an intermediate body, a lower pump body, a pump cavity film, an inlet valve, an outlet valve, a water inlet pipe plate and a water outlet pipe plate. Under driving by a power frequency power supply, the piezoelectric vibrator is bent to deform to generate periodic-changed inertia impact force; and the inertia impact force is acted on the pump cavity film through the connector and the elliptic connecting piece to realize oriented driving of fluids.

Description

Technical field [0001] The invention belongs to the technical field of piezoelectric pumps, and particularly relates to a resonant piezoelectric pump working at a power frequency. Background technique [0002] Piezoelectric pump is a new type of fluid transmission device with piezoelectric vibrator as the driving force source. It has significant advantages, such as small size, low cost, simple structure, and no electromagnetic interference. There is great demand in the fields of chemical analysis, biomedicine, and micro-electromechanical engineering. [0003] When the existing piezoelectric pump is driven at the power frequency, it works in a quasi-static state, which is not conducive to the matching of the output impedance of the piezoelectric ceramics and the pump cavity. At the same time, the electromechanical conversion efficiency of the piezoelectric pump is lower than that of the resonance-driven piezoelectric pump. Working in a quasi-static state, the piezoelectric vibrator...

Claims

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Application Information

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IPC IPC(8): F04B43/04
CPCF04B43/046
Inventor 潘巧生王凯伦冯冲贺良国尹静李伟
Owner HEFEI UNIV OF TECH
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