Development of a low-voltage piezohydraulic pump for compact hydraulic systems

Valdovinos, John; Carman, Gregory P.

doi:10.1088/0964-1726/24/12/125008

Cited by 19 publications

(9 citation statements)

References 21 publications

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“…The first method is used in the pump design with a large input stroke [ 164 ]. The second one is commonly used in the design with a small to medium input stroke [ 147 , 158 , 165 , 166 , 167 ]. However, a thin diaphragm plate will be deformed permanently after repeated cycles.…”

Section: Hybrid Piezoelectric–hydraulic Systemmentioning

confidence: 99%

Large-Scale Piezoelectric-Based Systems for More Electric Aircraft Applications

Lubecki

Chow

et al. 2021

Micromachines

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A new approach in the development of aircraft and aerospace industry is geared toward increasing use of electric systems. An electromechanical (EM) piezoelectric-based system is one of the potential technologies that can produce a compactable system with a fast response and a high power density. However, piezoelectric materials generate a small strain, of around 0.1–0.2% of the original actuator length, limiting their potential in large-scale applications. This paper reviews the potential amplification mechanisms for piezoelectric-based systems targeting aerospace applications. The concepts, structural designs, and operation conditions of each method are summarized and compared. This review aims to provide a good understanding of piezoelectric-based systems toward selecting suitable designs for potential aerospace applications and an outlook for novel designs in the near future.

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Section: Hybrid Piezoelectric–hydraulic Systemmentioning

confidence: 99%

Large-Scale Piezoelectric-Based Systems for More Electric Aircraft Applications

Lubecki

Chow

et al. 2021

Micromachines

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“…Chen et al [20] proposed a U-shaped vibrator passive valve piezoelectric pump, which could reach 85 kPa when the driving voltage was 300 V pp . Valdovinos and Carman [21] proposed a piezohydraulic pump utilising a 2 g low-voltage piezoelectric stack, which could reach 125 kPa. Zeng et al [22] proposed an umbrella valve piezoelectric pump, which could reach 40.5 kPa when the driving voltage was 90 V. Peng et al [23] proposed a multichamber piezoelectric pump, which could reach 32.47 kPa when the driving voltage was 210 V. By contrast, the valved piezoelectric pump had a higher output pressure.…”

Section: Introductionmentioning

confidence: 99%

Design and investigation of a resonant piezoelectric pump with high output pressure using a displacement-amplifying vibrator

Qing

Diao

et al. 2022

Smart Mater. Struct.

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A resonant piezoelectric pump using a displacement-amplifying vibrator is proposed in this paper to improve the output pressure of the piezoelectric pump. The piezoelectric pump is composed of a displacement-amplifying vibrator and a pump body. The displacement-amplifying vibrator consists of two amplifiers and two piezoelectric stacks. The pump body comprises a piston shaft, an orifice plate, a valve body, check valves and a runner plate. A clearance exists between the piston shaft and the orifice plate. A groove is designed on the piston shaft, and the pump body is sealed by an O-ring. The displacement-amplifying vibrator works in the resonant state, which has a large output amplitude. In this paper, the working principle of the piezoelectric pump is introduced and the influencing factors of output pressure of the piezoelectric pump are theoretically analyzed. The resonant frequency and stiffness of check valves with different thicknesses are simulated and compared, and three displacement amplifiers are designed and simulated. Prototypes of piezoelectric pump are made, and the effect of valve thickness, the diameter of piston shaft, and the displacement-amplifying vibrator is experimentally investigated. The experimental results show that the piezoelectric pump prototype with displacement-amplifying vibrator 3, 10 mm piston shaft and 0.05 mm-thick check valve has the maximum output pressure. Under the driving voltage of 500 Vpp, the maximum output pressure is 4.73 MPa, and the maximum flowrate is 65.7 ml min−1.

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“…However, there is a common backflow problem with valveless piezoelectric pumps, which is one of the biggest drawbacks. Therefore, several scholars have investigated piezoelectric pumps in terms of various structures [23,24] and applications [25][26][27][28]. In 2008, Tanaka et al [29] used polymethyl methacrylate as a substrate and traditional machining technology to manufacture the prototype.…”

Section: Introductionmentioning

confidence: 99%

Valveless Piezoelectric Pump with Reverse Diversion Channel

et al. 2021

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In order to reduce backflow and improve output performance, a valveless piezoelectric pump with a reverse diversion channel was produced. The channel was designed based on the structure of the Tesla valve, which has no moving parts and can produce a high-pressure drop during reverse flow. Therefore, this special flowing channel can reduce the backflow of a valveless piezoelectric pump, which has the characteristic of one-way conduction. This work first revealed the relationship between the main structural parameters of the Tesla valve and the kinetic energy difference of liquid. Then, by using simulation software, the structure was verified to have the characteristics of effective suppression of the backflow of valveless piezoelectric pumps. Through setting multiple simulations, some important parameters that include the optimal height between the straight channels (H), the optimal angle (α) between the straight channel and the inclined channel, as well as the optimal radius (R) of the channel were confirmed. Finally, a series of prototypes were fabricated to test the output performance of this valveless piezoelectric pump. Comparing the experimental results, the optimal parameters of the Tesla valve were determined. The results suggest that when the parameters of the Tesla valve were H = 8 mm, α = 30°, and R = 3.4 mm, the output performance of this piezoelectric pump became best, which had a maximum flow rate of 79.26 mL/min with a piezoelectric actuator diameter of 35 mm, an applied voltage of 350 Vp-p, and a frequency of 28 Hz. The effect of this structure in reducing the return flow can be applied to fields such as agricultural irrigation.

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Development of a low-voltage piezohydraulic pump for compact hydraulic systems

Cited by 19 publications

References 21 publications

Large-Scale Piezoelectric-Based Systems for More Electric Aircraft Applications

Large-Scale Piezoelectric-Based Systems for More Electric Aircraft Applications

Design and investigation of a resonant piezoelectric pump with high output pressure using a displacement-amplifying vibrator

Valveless Piezoelectric Pump with Reverse Diversion Channel

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