一种脱涡纵振式压电管道气流俘能器

doi:10.3901/JME.2019.08.024

机械工程学报 ›› 2019, Vol. 55 ›› Issue (8): 24-29.doi: 10.3901/JME.2019.08.024

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一种脱涡纵振式压电管道气流俘能器

王淑云, 富佳伟, 阚君武, 陈松, 张忠华, 梁程

浙江师范大学精密机械与智能结构研究所金华 321004

收稿日期:2018-06-28 修回日期:2018-11-04 出版日期:2019-04-20 发布日期:2019-04-20
通讯作者: 阚君武(通信作者),男,1965年出生,教授,博士研究生导师。主要研究方向为压电驱动器、能量回收与自供电技术、精密机械与微小机械。E-mail:jutkjw@163.com
作者简介:王淑云,女,1965年出生,教授。主要研究方向为工程问题的理论建模、仿真分析及优化。E-mail:jutwsy@163.com
基金资助:
国家自然科学基金（61574128，51877199，51377147，51577173）、浙江省自然科学基金（LY17F010004，LY16F010003）、国家级大学生创新创业训练计划（201810345036）和浙江省新苗人才计划（2018R404041）资助项目。

A Pipe Airflows Piezoelectric Energy Harvester with Longitudinal Vibration Excited by Vortex Shedding

WANG Shuyun, FU Jiawei, KAN Junwu, CHEN Song, ZHANG Zhonghua, LIANG Cheng

Institute of Precision Machinery and Intelligent Structure, Zhejiang Normal University, Jinhua 321004

Received:2018-06-28 Revised:2018-11-04 Online:2019-04-20 Published:2019-04-20

摘要/Abstract

摘要： 为满足管道流体监测系统的自供电需求，针对流速/向恒定、空间有限的管道流环境下压电振子的有效激励问题，提出一种脱涡纵振式压电管道气流俘能器。介绍了其系统构成及工作原理，并进行了理论和试验研究，证明了其结构原理的可行性。研究结果表明：平均阻力随流速/直径比增长呈二次方关系，平均阻力过大时会减小压电振子振幅，平均阻力系数随直径比上升先增加最终达到固定值（6.23）；其他参数确定时，分别存在最佳流速和最佳直径比使输出电压最大，外接电阻为240 kΩ，流速为32 m/s，直径比为0.93时，试验测得最大输出功率为1.25 mW，应根据实际流速范围确定合理的直径比及负载以提高俘能器的输出功率，低流速时适当增大直径比、高流速时适当减小直径比有助于提高发电能力。

关键词: 管道气流, 脱涡, 压电, 自激, 纵振俘能器

Abstract: To meet the demands of pipe flows monitoring system for self-power and solve the problem of effective excitation of a piezoelectric vibrator in a flow-rate/direction constant and space-limited pipe flows environment, a novel pipe airflows piezoelectric energy harvester (PAPEH) with longitudinal vibration excited by vortex shedding is presented. Introduce the system composition and operational principle of the PAPEH, and carry out theoretical and experimental studies. The results show that the average drag has a quadratic relationship with flow rates and diameter ratios, and it reduces the amplitude of the piezoelectric vibrator when it is too large; The average drag factor increases with the diameter ratios and finally stabilize to 6.23; Other parameters are determined, respectively, there is the optimal flow rate and the optimal diameter ratio to maximize the output voltage, when the resistor is 240 kΩ, the flow rate is 32 m/s, the diameter ratio is 0.93, and the output power reaches 1.25 mW. Therefore, improving the output power should determine a reasonable diameter ratio and load based on the actual flow rates range. Proper increase the diameter ratio at low flow rates and reduction in diameter ratio at high flow rates help to increase power generation capacity.

Key words: longitudinal vibration energy harvester, piezoelectric, pipe airflows, self-excited, vortex shedding

中图分类号:

TN384
TM619

王淑云, 富佳伟, 阚君武, 陈松, 张忠华, 梁程. 一种脱涡纵振式压电管道气流俘能器[J]. 机械工程学报, 2019, 55(8): 24-29.

WANG Shuyun, FU Jiawei, KAN Junwu, CHEN Song, ZHANG Zhonghua, LIANG Cheng. A Pipe Airflows Piezoelectric Energy Harvester with Longitudinal Vibration Excited by Vortex Shedding[J]. Journal of Mechanical Engineering, 2019, 55(8): 24-29.

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一种脱涡纵振式压电管道气流俘能器

A Pipe Airflows Piezoelectric Energy Harvester with Longitudinal Vibration Excited by Vortex Shedding

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