Design and development of a piezoelectric-hydraulic hybrid actuator with quarter-wavelength tubes

Zhang, Jun Jian; Qian, Min; Pan, Qiaosheng; Feng, Zhihua

doi:10.1088/1361-665x/acfc0b

Cited by 3 publications

(1 citation statement)

References 35 publications

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“…Piezoelectric pump is a typical and common type micropump, which utilizes the inverse piezoelectric effect of piezoelectric materials to generate mechanical deformation with the Depending on the used piezoelectric driving elements, piezoelectric pumps can be divided into piezoelectric sheet pumps [9,10] and piezoelectric stack pumps [11,12]. Piezoelectric sheet vibrators can produce large vibrating displacement, but have small driving force and low resonant frequency; so they are usually used to drive flow-type piezoelectric pumps for the purpose of transporting fluid.…”

Section: Introductionmentioning

confidence: 99%

Development of an inertia-driven resonant piezoelectric stack pump based on the flexible support structure

Chen,

Jin,

Gao

et al. 2024

Smart Mater. Struct.

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This paper proposes an inertia-driven resonant piezoelectric stack pump based on a flexible support structure to solve the problem that the piezoelectric stack cannot effectively drive the diaphragm pump to transport liquid due to too small output displacement and too high resonant frequency when one end is fixed. Under the inertial force generated by the vibration of the piezoelectric stack’s mass center during its deformation, the whole piezoelectric stack will vibrate with the flexible support structure; and a large displacement and inertial force can be achieved to drive the pump at the resonant frequency. Piezoelectric pumps are designed with a diaphragm pump and a piezoelectric stack based on the flexible support structure. The piezoelectric vibrator includes a piezoelectric stack, a preloading component and a flexible support plate. A fixed support plate and three flexible support plates with different stiffnesses were fabricated and assembled with the same piezoelectric stack and diaphragm pump respectively to construct four piezoelectric pump prototypes with different resonant frequencies. The temperature rise characteristics of the piezoelectric stack were experimentally studied to determine the safe range of the driving voltage and frequency. Then the output performances of the piezoelectric pumps were tested. Under a sinusoidal driving voltage of 100 Vpp, the piezoelectric pump based on the fixed support structure cannot pump water, while the piezoelectric pumps based on the flexible support structure achieved the maximum flow rates of 89.0 ml/min, 123.4 ml/min and 197.4 ml/min at the resonant frequencies of 262 Hz, 297 Hz and 354 Hz, and the maximum backpressures of 4.4 kPa, 7.5 kPa and 11.0 kPa at 266 Hz, 309 Hz and 365 Hz.

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Section: Introductionmentioning

confidence: 99%

Development of an inertia-driven resonant piezoelectric stack pump based on the flexible support structure

Chen,

Jin,

Gao

et al. 2024

Smart Mater. Struct.

View full text Add to dashboard Cite

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Design and research of a piezoelectric-hydraulic hybrid actuation system with a half-wave resonator

Zhang,

Qian,

Feng

2024

Journal of Intelligent Material Systems and Structures

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A novel piezoelectric-hydraulic hybrid actuation system with a half-wave resonator is proposed in this paper to generate high-frequency, high-pressure liquid flow and mechanical output through liquid resonance. The new hybrid actuator is similar to the traditional hybrid actuator, with the main difference being the pump chamber itself. The length of the specially designed pump chamber is greater than that of the traditional pump chamber, which facilitates resonance by virtue of the compliance and inertia of the liquid. Once the excitation frequency approaches the resonant frequency of the liquid in the pump chamber, the pressure in the pump chamber will be higher than that under quasi-static conditions, and the output of the hybrid actuator will benefit from it. The compositional structure and working principle of the new hybrid actuator are presented, and its output performance is experimentally studied. When the voltage is 400 Vp-p and the frequency is approximately 2.44 kHz, the actuator can output a maximum no-load velocity of 5.4 mm/s and a maximum blocking force of 181 N. This strategy verifies the feasibility of using liquid resonance for actuation and realizes high-frequency excitation of the hybrid actuator, which also provides a reference for future research on high-frequency hybrid actuators.

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Design and Testing of a Multi-Cylinder Piezopump for Hydraulic Actuation

Sell,

Sciatti,

Plummer

et al. 2024

Energies

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Hydraulic actuation systems are widely used in industries such as aerospace, the marine industry, off-highway vehicles, and manufacturing. There has been a shift from the hydraulic distribution of power from a centralized supply to electrical power distribution, to reduce the maintenance requirements and weight and improve the efficiency. However, hydraulic actuators have many advantages, such as power density, durability, and controllability, so the ability to convert electrical to hydraulic power locally to drive an actuator is important. Traditional hydraulic pumps are inefficient and unsuitable for low-power applications, making piezopumps a promising alternative for the conversion of electrical to hydraulic power in the sub-100 W range. Currently, the use of piezopumps is limited by their maximum power (typically a few watts or less) and low flows. This paper details the design, simulation, and testing of a multi-cylinder piezopump designed to push the envelope of the power output. The simulation results demonstrate that pumps with two or three cylinders show increasing benefits in terms of hydraulic and electrical performance due to the reduced flow and current ripple compared to a single-cylinder pump. The experimental results from a two-cylinder pump confirm this, and the effect of the phase relationship between the drive signals is investigated in detail. The experimental pump has fast-acting disc-style reed non-return valves, allowing piezostack drive frequencies of up to 1.4 kHz to be used. Custom power electronics tailored to the pump are developed. These features are critical in demonstrating the potential for multi-cylinder piezopumps to play an important role as a future actuation solution.

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Design and development of a piezoelectric-hydraulic hybrid actuator with quarter-wavelength tubes

Cited by 3 publications

References 35 publications

Development of an inertia-driven resonant piezoelectric stack pump based on the flexible support structure

Development of an inertia-driven resonant piezoelectric stack pump based on the flexible support structure

Design and research of a piezoelectric-hydraulic hybrid actuation system with a half-wave resonator

Design and Testing of a Multi-Cylinder Piezopump for Hydraulic Actuation

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