A Resonant Piezoelectric Pump Working at 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 matching the output impedance of piezoelectric ceramics with the pump cavity, reducing the service life of piezoelectric vibrators, Problems such as low electromechanical conversion efficiency of piezoelectric pumps

Active Publication Date: 2021-04-09
HEFEI UNIV OF TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A Resonant Piezoelectric Pump Working at Power Frequency
  • A Resonant Piezoelectric Pump Working at Power Frequency
  • A Resonant Piezoelectric Pump Working at Power Frequency

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Embodiment Construction

[0051] In order to make the purpose, technical solutions and advantages of the present invention clearer, the following technical solutions in the present invention are clearly and completely described. Obviously, the described embodiments are some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

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

[0053] Such as figure 2 The piezoelectric ceramic 1 is divided into an upper piezoelectric ceramic sheet 101 and a lower piezoele...

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Abstract

The invention provides a resonant piezoelectric pump working at power frequency, which belongs to piezoelectric resonance devices. It includes an excitation system composed of piezoelectric ceramics, tuning fork vibrator, mass block, bolts, connectors, oval connecting pieces, upper pump body, intermediate body, lower pump body, pump cavity membrane, inlet valve, outlet valve, The pump body is composed of inlet tube plate and outlet tube plate. Driven by a commercial frequency power supply, the piezoelectric vibrator bends and deforms to produce a periodically changing inertial impact force, which acts on the membrane of the pump cavity through the connector and the elliptical connecting piece, thereby realizing the directional drive of the fluid.

Description

technical field [0001] The invention belongs to the technical field of piezoelectric pumps, in particular to a resonant piezoelectric pump working at 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 power frequency, it works under quasi-static conditions, which is not conducive to the matching of the output impedance of piezoelectric ceramics and the pump chamber, and at the same time, the efficiency of electromechanical conversion is lower than that of resonance-driven piezoelectric pumps. Working in quasi-static state, the piezoelectric vibrator needs to be in direct contact ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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