低频弯振超声雾化喷头压电振子基频的预测模型

针对现有基于郎之万夹心振子的低频超声雾化喷头驱动电压高、工作效率低、电路和喷头发热严重、体积较大难以生成超细雾滴等缺点,研发了一种低频弯振超声雾化喷头,该喷头的核心工作部件是轴对称复合弯振压电振子。为了研究轴对称复合弯振压电振子关键结构参数对其基频的影响,在ANSYS平台上,建立了轴对称复合弯振压电振子的虚拟试验系统。采用正交试验设计方法,对试验结果进行了极差分析和回归分析,建立了试验指标轴对称复合弯振压电振子基频与压电陶瓷的外径、内径、厚度及金属圆片直径的回归数学模型。极差分析和回归分析结果表明：压电陶瓷的外径、内径及金属圆片直径对轴对称复合弯振压电振子基频的影响极显著;压电陶瓷厚度对轴对称...

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Bibliographic Details
Published in农业工程学报 Vol. 31; no. 4; pp. 55 - 62
Main Author 高建民 滕悦
Format Journal Article
LanguageChinese
Published 江苏大学现代农业装备与技术省部共建教育部重点实验室/江苏省重点实验室,镇江,212013 2015
Subjects
压电振子
喷头
喷雾
基频
有限元法
正交设计法
超声雾化
composite fundamental frequency
ultrasonic nozzle
orthogonal design
spraying
piezoelectric actuator
喷雾
有限元法
nozzle
正交设计法
finite element method
压电振子
超声雾化
喷头
基频
Online AccessGet full text
ISSN1002-6819
DOI10.3969/j.issn.1002-6819.2015.04.008

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Summary:针对现有基于郎之万夹心振子的低频超声雾化喷头驱动电压高、工作效率低、电路和喷头发热严重、体积较大难以生成超细雾滴等缺点,研发了一种低频弯振超声雾化喷头,该喷头的核心工作部件是轴对称复合弯振压电振子。为了研究轴对称复合弯振压电振子关键结构参数对其基频的影响,在ANSYS平台上,建立了轴对称复合弯振压电振子的虚拟试验系统。采用正交试验设计方法,对试验结果进行了极差分析和回归分析,建立了试验指标轴对称复合弯振压电振子基频与压电陶瓷的外径、内径、厚度及金属圆片直径的回归数学模型。极差分析和回归分析结果表明：压电陶瓷的外径、内径及金属圆片直径对轴对称复合弯振压电振子基频的影响极显著;压电陶瓷厚度对轴对称复合弯振压电振子基频的影响显著;各影响因素对低频弯振超声雾化喷头基频的影响主次顺序依次为压电陶瓷外径、压电陶瓷内径、金属圆片直径、压电陶瓷厚度。轴对称复合弯振压电振子物理样机的基频测试试验结果和回归数学模型预测结果对比表明该回归模型的预测误差基本在5%以内,从而验证了回归模型预测的精准性。该回归模型为轴对称复合弯振压电振子结构参数的优化设计提供了较为实用的数学模型。
Bibliography:11-2047/S
Gao Jianmin, Teng Yue （Key Laboratory of Modem Agricultural Equipment and Technology, Ministry of Education ＆ Jiangsu Province, Jiangsu University, Zhenjiang 212013, China）
nozzle; spraying; piezoelectric actuator; composite fundamental frequency; ultrasonic nozzle; orthogonal design; finite element method
Ultrasonic atomization had been paid so much attention as a new spraying technique recently. With such advantages as small droplets, uniform size distribution, high roundness, large atomization quantity and low liquid delivery pressure, ultrasonic atomization is widely used in aeroponic, agricultural humidifying fields, reagents atomization treatment, semiconductor etching and so on. According to different the working frequency, the current ultrasonic atomizer mainly includes high-frequency（working frequency is greater than 1 MHz） and low-frequency（working frequency is in the range between 20 k Hz and 100 kH z）. Application of high-frequency ultrasonic atomizer was highly limited for such disadvantag
ISSN:1002-6819
DOI:10.3969/j.issn.1002-6819.2015.04.008