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A resonant piezoelectric stack pump based on a two-stage nested rhombus displacement-amplifying vibrator in symmetric-drive mode.

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Title: A resonant piezoelectric stack pump based on a two-stage nested rhombus displacement-amplifying vibrator in symmetric-drive mode.
Authors: Chen, Jian1 (AUTHOR), Feng, Zihan1 (AUTHOR), Jin, Rong1 (AUTHOR), Gao, Wenzhi1 (AUTHOR), Liu, Changhai1 (AUTHOR), Zeng, Yishan1 (AUTHOR), Wang, Jingwu2 (AUTHOR) wangjingwu@tsinghua-hf.edu.cn
Source: Journal of Intelligent Material Systems & Structures. Aug2025, Vol. 36 Issue 14, p949-962. 14p.
Subjects: Piezoelectric actuators, Vibrators, Finite element method, Dynamic loads
Abstract: This paper proposes a resonant piezoelectric stack pump based on a two-stage nested rhombus displacement-amplifying vibrator in symmetric-drive mode. Two rhombus displacement amplifiers are connected in a nested manner to achieve exponential displacement amplification of the piezoelectric stack. Symmetric-drive mode is adopted to minimize the vibrating mass and inertial load in the displacement output direction of the piezoelectric vibrator, thereby improving its resonant frequency. A piezo-actuated two-stage nested rhombus displacement-amplifying vibrator was designed, and its output characteristics in fix-drive mode and symmetric-drive mode were analyzed theoretically and by finite element simulation. Two piezoelectric pumps were designed and fabricated with the same piezoelectric vibrator in fix-drive mode and symmetric-drive mode respectively, and their output performances were tested and compared. Under a sinusoidal driving voltage of 80 V, the piezoelectric pump in fix-drive mode achieved the maximum flow rate of 168.8 ml/min at the resonant frequency of 201 Hz and the maximum backpressure of 7.4 kPa at 203 Hz; while the maximum flow rate and backpressure of the piezoelectric pump in symmetric-drive mode reached 792.2 ml/min and 35.6 kPa at the corresponding resonant frequencies of 660 and 721 Hz. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
Abstract:This paper proposes a resonant piezoelectric stack pump based on a two-stage nested rhombus displacement-amplifying vibrator in symmetric-drive mode. Two rhombus displacement amplifiers are connected in a nested manner to achieve exponential displacement amplification of the piezoelectric stack. Symmetric-drive mode is adopted to minimize the vibrating mass and inertial load in the displacement output direction of the piezoelectric vibrator, thereby improving its resonant frequency. A piezo-actuated two-stage nested rhombus displacement-amplifying vibrator was designed, and its output characteristics in fix-drive mode and symmetric-drive mode were analyzed theoretically and by finite element simulation. Two piezoelectric pumps were designed and fabricated with the same piezoelectric vibrator in fix-drive mode and symmetric-drive mode respectively, and their output performances were tested and compared. Under a sinusoidal driving voltage of 80 V, the piezoelectric pump in fix-drive mode achieved the maximum flow rate of 168.8 ml/min at the resonant frequency of 201 Hz and the maximum backpressure of 7.4 kPa at 203 Hz; while the maximum flow rate and backpressure of the piezoelectric pump in symmetric-drive mode reached 792.2 ml/min and 35.6 kPa at the corresponding resonant frequencies of 660 and 721 Hz. [ABSTRACT FROM AUTHOR]
ISSN:1045389X
DOI:10.1177/1045389X251358931