The Design , Fabrication and Test of PZT-Actuated Micro-Ejector with Multiple Nozzles

• Main Authors: HSUN TSUNG CHANG, 張琮勛
• Other Authors: Chiang ho Cheng
• Format: Others
• Language: zh-TW
• Published: 2005
• Online Access: http://ndltd.ncl.edu.tw/handle/47731069435718570065

碩士 === 大葉大學 === 機械工程研究所碩士班 === 93 === The paper aims at the design, fabrication and test of a micro-ejector applied to the flush cleaning of the toilet. The micro-ejector ejects once multiple droplets of condensed cleanser diluted with water near the tube outlet. The low cost and mass production are considered under development stage. The size of cleaning module will be more compact due to the implantation of micro-ejector. The key components of the micro-ejector include an annular PZT actuator and a nickel plate. The nickel is electroformed with multiple nozzles. The PZT actuator is attached to the nickel plate and those nozzles are arranged around the annular centre.a When PZT actuator is actuated, the extension difference between two layers make the nickel plate bend and vibrate, and impact of chamber liquid result in droplets ejection from those nozzles. The finite element software, ANSYS, will be utilized for the static and modal analysis of the composite plate. The simulating results will be verified by experiments. The testing instruments include laser vibrometer and impedence analyzer for displacement and resonant frequency measurement respectively. Also, micro-ejector prototypes for experiment are assembled to observe the droplet generation and ejection.