Development of large flow rate, robust, passive micro check valves for compact piezoelectrically actuated pumps

Li, Bo; Chen, Quanfang; Lee, Dong-Gi; Woolman, Jason L.; Carman, Gregory P.

doi:10.1016/j.sna.2004.06.029

Cited by 76 publications

(63 citation statements)

References 12 publications

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“…There are no available commercial miniature hydraulic pump products 24,25 to satisfy the above specifications. The maximum flow quantity of piezoelectric pump in the study by Li et al 26 is up to 1.08 L min…”

Section: Design Of Shdsmentioning

confidence: 86%

Driving performance of underwater long-arm hydraulic manipulator system for small autonomous underwater vehicle and its positioning accuracy

Yang

Wang

Yao

2017

International Journal of Advanced Robotic Systems

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A novel underwater long-arm manipulator (ULAM) and its improved small-flow hydraulic driving system (SHDS) are presented in this article for small autonomous underwater vehicle (AUV). In the process of manipulator design, a joint driving device consisting of linear hydraulic cylinder, three-bar linkage, and four-bar linkage mechanism is developed to allow the manipulator to be folded. Since the manipulator is much long, a small joint angle deviation would result in a large end-effector's position deviation. To solve the problem, a small-flow hydraulic driving device with circulation in closed loop is proposed. And in the long-arm manipulator, the cross-sectional area of manipulator is small. So the diameter of hydraulic pipeline installed inside the manipulator is limited, but the pipeline should also be long enough. In this case, it is common to cause large pressure loss in hydraulic system. And, rather than oil, water is selected as the hydraulic medium due to the low viscosity. In the hydraulic system design, a scheme with circulation in closed loop and improved sealing structure (consisting of O-ring and Glyd-ring) are developed to reduce the internal leakage and maintain a good endeffector's precision. In addition, the compressibility of water is relatively large, and it would bring bad impact on endeffector's precision. In this case, the vacuum-treated water is used and it has a good performance in the high-pressure condition. But in the low-pressure condition, the problem is still serious. In order to solve the problem, based on the "vacuum treatment," a pre-pressurization pressure treatment is added for the vacuum-treated water. All the improved ways are verified by experiment results. Finally, the end-effector's positioning experiment and trajectory tracking experiment are conducted on manipulator and small AUV, so as to verify the effectiveness and feasibility of the ULAM.

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Section: Design Of Shdsmentioning

confidence: 86%

Driving performance of underwater long-arm hydraulic manipulator system for small autonomous underwater vehicle and its positioning accuracy

Yang

Wang

Yao

2017

International Journal of Advanced Robotic Systems

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“…This type of valves present a more complicated manufacturing process, however they are claimed to support great values of pressure. In fact, [33] discusses the tendency of flap valves to fail under extreme high pressures and the convenience of having four contact points with the pump structure instead of one which is the case of the flap-valve. The author presents a micro-pump actuated by a piezoelectric stack supporting 350 PSI at 10 kHz.…”

Section: Reciprocating Micro-pumps With Check Valvesmentioning

confidence: 99%

A global assessment of piezoelectric actuated micro-pumps

Yves

Razek

2010

Eur. Phys. J. Appl. Phys.

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Abstract. This article provides an extensive outlook of different types of piezoelectric actuated micropumps published in the literature recently. We start by reminding the reader about the conventional operating parameters used to quantify the capabilities of these devices. After this introductory stage, we describe and classify the most prominent micro-pump's geometries found with piezoelectric actuation. At this point we identify the parameters given previously for each pump in order to establish a subsequent discussion in which the trends of different families are compared. Specific attention is given to the particularities of each case namely: flow rates and backpressures.

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“…Several research studies have been conducted on the design of high frequency valves in piezohydraulic pumps with the goal of increasing pump power output [15][16][17][18]. While some researchers have shown that increasing the bandwidth of the valve can potentially increase power output, the resonant characteristics of the working fluid and external hydraulic components also have a significant impact on pump performance.…”

Section: Introductionmentioning

confidence: 99%

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

Valdovinos

Carman

2015

Smart Mater. Struct.

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Frequency-leveraged electrohydraulic and piezohydraulic pumps represent an alternative technology to traditional electromagnetic motors. The development of a 45 cm 3 piezohydraulic pump utilizing a 2 g low-voltage piezoelectric stack is presented. The piezohydraulic pump flow rate and performance were measured and compared to existing pumps in the literature. The flow rate produced by piezohydraulic pump was a non-linear function of pump operational frequency showing multiple peaks. These flow rate peaks were a function of accumulator size and hydraulic line resonance. The piezohydraulic pump was capable of producing a 125 kPa stall pressure, 186 mL/min no-load flow rate, and 0.14 W of power. This pump constitutes one of the two miniature piezohydraulic pumps capable of outputting useful mechanical work. In addition, these results demonstrate that the external hydraulic lines and hydraulic accumulators have a significant effect on the flow and power output of this technology.

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Development of large flow rate, robust, passive micro check valves for compact piezoelectrically actuated pumps

Cited by 76 publications

References 12 publications

Driving performance of underwater long-arm hydraulic manipulator system for small autonomous underwater vehicle and its positioning accuracy

Driving performance of underwater long-arm hydraulic manipulator system for small autonomous underwater vehicle and its positioning accuracy

A global assessment of piezoelectric actuated micro-pumps

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

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