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A Piezoelectric Resonance Pump Based on a Flexible Support.

Jiantao Wang1,2, Xiaolong Zhao3, Xiafei Chen4

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Summary

This study introduces a novel piezoelectric resonance pump with a square piezoelectric vibrator and flexible support to enhance volume change. Optimized designs achieved a maximum diaphragm amplitude of 0.43933 mm, improving pump performance.

Keywords:
flexible supportpiezoelectric diaphragm pumppiezoelectric resonance pumpresonancesquare piezoelectric vibrator

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Area of Science:

  • Mechanical Engineering
  • Materials Science
  • Fluid Dynamics

Background:

  • Piezoelectric diaphragm pumps face limitations in performance due to small volume changes.
  • Improving the volume change is crucial for enhancing pump efficiency.

Purpose of the Study:

  • To propose and investigate a novel piezoelectric resonance pump design.
  • To increase the volume change of the pump chamber using a square piezoelectric vibrator with flexible support.
  • To optimize structural parameters for improved flow rate and pressure.

Main Methods:

  • Utilized a square piezoelectric vibrator with flexible support as the pump's driving unit.
  • Separated the pump chamber diaphragm from the driving unit.
  • Employed resonance principles to amplify diaphragm amplitude.
  • Analyzed the working principle and established the motion differential equation of the vibration system.
  • Fabricated and tested prototypes with varying structural parameters.

Main Results:

  • The piezoelectric resonance pump achieved resonance at 236 Hz when pumping air.
  • A peak-to-peak voltage of 220 V resulted in a maximum diaphragm amplitude of 0.43933 mm.
  • Optimized chamber height of 0.25 mm yielded a maximum water output flow rate of 213.5 mL/min.
  • A chamber height of 0.15 mm produced a maximum output pressure of 85.2 kPa.

Conclusions:

  • The proposed piezoelectric resonance pump design effectively increases volume change and improves pump performance.
  • The study demonstrates the potential of resonance principles in amplifying diaphragm amplitude for enhanced piezoelectric pump operation.
  • Optimized structural parameters are critical for achieving maximum flow rate and pressure in piezoelectric diaphragm pumps.