Development of a piezoelectric pump using hinge-lever amplification mechanism

Abstract

This paper presents the design, fabrication, and tests of a piezoelectric pump using hinge-lever amplification mechanism. The proposed hinge-lever amplification mechanism consists of a base frame, a lever with contact steel ball, and a multilayer piezoelectric actuator. The lever is in contact with the piezoelectric actuator through hinged steel ball. The extended piezoelectric actuator pushes the contact steel ball; therefore, a small displacement of piezoelectric actuator can be amplified through the movement of the lever. The amplified displacement of 683 μm was measured at the applied voltage of 100 V. These results show the fact that the proposed hinge-lever mechanism can be obtained the amplification ratio of up to ten times. The piezoelectric pump using hinge-lever amplification mechanism was fabricated and pumping performance was experimentally investigated. The pump achieved no-load flow rate, maximum output pressure of 600 ml/min and 6.8 kPa, respectively, at the applied voltage of 100 V and driving frequency of 250 Hz.

Performance evaluation and comparison of a serial–parallel hybrid multichamber piezoelectric pump

“…In recent years, micropumps have been developing rapidly with extensive potential applications in the fields of biological instruments (Amirouche et al, 2009; Yang et al, 2016), medical treatment (Iverson and Garimella, 2008; Ma et al, 2015), lab-on-a-chip (LOC) devices (Pan and Wang, 2016; Zhang and Eitel, 2013), drug delivery systems (Tandon et al, 2016; Tsai and Sue, 2007), micro total analysis systems (µTAS; Iijima et al, 2017; Zhang and Eitel, 2013), and electronics cooling (Bayomy et al, 2016; De Lima et al, 2009; Ham et al, 2009). There have been a great number of micropump operating mechanisms to control the precise fluid from micro-scale to macro-scale (Amirouche et al, 2009; Tandon et al, 2016; Tsai and Sue, 2007).…”

“…The valve could simultaneously meet high pressure (300 kPa) and large stroke(20–30 µm) requirements. Using a hinge-lever amplification mechanism, Ham et al (2009) developed a piezoelectric pump with the maximum output flow rate and pressure of 600 mL/min and 6.8 kPa, respectively. Through a newly developed piezoelectric folded vibrator, Wang et al (2014a) presented a high-flow-rate piezoelectric pump with the maximum flow rate of 118 mL/min and the maximum backpressure of 22.5 kPa.…”

Structure design and experimental study on single-bimorph double-acting check-valve piezoelectric pump

“…For example, Ham et al 9 used a hinge-lever amplification mechanism to enlarge the volumetric variation of the pump chamber, which enhanced the flow rate of the pump. Kan et al 10,11 improved the performance of the pump by connecting two or more SCCP pumps to form multi-chamber serial-connection PZT pumps.…”

“…For example, Ham et al. 9 used a hinge-lever amplification mechanism to enlarge the volumetric variation of the pump chamber, which enhanced the flow rate of the pump. Kan et al.…”

“…More recently, some researchers focused on improving the output performances of SCCP pumps to satisfy some applications where more flow rates and higher pumping pressure were needed. For example, Ham et al 9 used a hinge-lever amplification mechanism to enlarge the volumetric variation of the pump chamber, which enhanced the flow rate of the pump. Kan et al 10,11 improved the performance of the pump by connecting two or more SCCP pumps to form multi-chamber serial-connection PZT pumps.…”