A multi-chamber piezoelectric pump based on pumping unit with double circular piezoelectric unimorph actuators

Research Concerning the Identification of Some Parameters of a Sucker Rod Pumping Unit

Revista de Chimie ◽

10.37358/rc.17.10.5872 ◽

2017 ◽

Vol 68 (10) ◽

pp. 2289-2292

Author(s):

Dorin Badoiu ◽

Georgeta Toma

Keyword(s):

Computer Program ◽

Essential Role ◽

Automated Systems ◽

Maintenance Costs ◽

Motor Torque ◽

Unit Process ◽

Sucker Rod ◽

Pumping Unit

One of the solutions to reduce the production and maintenance costs of the sucker rod pumping installations is to develop automated systems for regulating and controlling their operations. The development of these automated systems requires an attentive modeling of the dynamics of the mechanism of the pumping unit, process in which the identification of the values of the parameters involved in the calculations plays an essential role. The paper presents the manner of determining the values of some parameters of the mechanism of a C-320D-256-100 pumping unit starting from the variation on a cinematic cycle of the motor torque at the crank shaft. Simulations were performed with a computer program developed by the authors, and the experimental records were processed with the program Total Well Management.

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Modeling of Dynamic Loads on the Polished Rod of Pumping Unit in Case of Mulfunction of Rod Pump Operating

Proceedings of the Mavlyutov Institute of Mechanics ◽

10.21662/uim2014.1.018 ◽

2014 ◽

Vol 10 ◽

pp. 95-101

Author(s):

A.S. Topolnikov

Keyword(s):

Multiphase Flow ◽

Satisfactory Agreement ◽

Model Simulation ◽

Theoretical Modeling ◽

Dynamic Loads ◽

Plunger Pump ◽

Proposed Model ◽

Pumping Unit ◽

Polished Rod

The paper presents the results of theoretical modeling of joined movement of pump rods and plunger pump and multiphase flow in a well for determination of dynamic loads on the polished rod of pumping unit. The specificity of the proposed model is the possibility of taking into account for complications in rod pump operating, such as leakage in valve steam, presence of gas and emulsion, incorrect fitting of plunger inside the cylinder pump. The satisfactory agreement of results of the model simulation with filed measurements are obtained.

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Research on a Piezoelectric Pump with Flexible Valves

Applied Sciences ◽

10.3390/app11072909 ◽

2021 ◽

Vol 11 (7) ◽

pp. 2909

Author(s):

Weiqing Huang ◽

Liyi Lai ◽

Zhenlin Chen ◽

Xiaosheng Chen ◽

Zhi Huang ◽

...

Keyword(s):

Flow Rate ◽

Fluid Transport ◽

Smooth Transition ◽

Driving Voltage ◽

Piezoelectric Pump ◽

Venous Valve ◽

Output Pressure ◽

Small Flow ◽

Working Principle ◽

Opening And Closing

Imitating the structure of the venous valve and its characteristics of passive opening and closing with changes in heart pressure, a piezoelectric pump with flexible valves (PPFV) was designed. Firstly, the structure and the working principle of the PPFV were introduced. Then, the flexible valve, the main functional component of the pump, was analyzed theoretically. Finally, an experimental prototype was manufactured and its performance was tested. The research proves that the PPFV can achieve a smooth transition between valved and valveless by only changing the driving signal of the piezoelectric (PZT) vibrator. The results demonstrate that when the driving voltage is 100 V and the frequency is 25 Hz, the experimental flow rate of the PPFV is about 119.61 mL/min, and the output pressure is about 6.16 kPa. This kind of pump can realize the reciprocal conversion of a large flow rate, high output pressure, and a small flow rate, low output pressure under the electronic control signal. Therefore, it can be utilized for fluid transport and pressure transmission at both the macro-level and the micro-level, which belongs to the macro–micro combined component.

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Backstepping Sliding-Mode Control of Piezoelectric Single-Piston Pump-Controlled Actuator

Actuators ◽

10.3390/act10070154 ◽

2021 ◽

Vol 10 (7) ◽

pp. 154

Author(s):

Bin Wang ◽

Pengda Ren ◽

Xinhao Huang

Keyword(s):

Sliding Mode Control ◽

Position Control ◽

Control Method ◽

Sliding Mode ◽

Piezoelectric Pump ◽

Mode Control ◽

Control Precision ◽

Backstepping Sliding Mode Control ◽

Actuator System ◽

The Mathematical Model

A piston piezoelectric (PZT) pump has many advantages for the use of light actuators. How to deal with the contradiction between the intermittent oil supplying and position control precision is essential when designing the controller. In order to accurately control the output of the actuator, a backstepping sliding-mode control method based on the Lyapunov function is introduced, and the controller is designed on the basis of establishing the mathematical model of the system. The simulation results show that, compared with fuzzy PID and ordinary sliding-mode control, backstepping sliding-mode control has a stronger anti-jamming ability and tracking performance, and improves the control accuracy and stability of the piezoelectric pump-controlled actuator system.

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Experiment analysis of high output pressure piezoelectric pump with straight arm wheeled check valve

Journal of Intelligent Material Systems and Structures ◽

10.1177/1045389x20987003 ◽

2021 ◽

pp. 1045389X2098700

Author(s):

Lipeng He ◽

Xiaoqiang Wu ◽

Zheng Zhang ◽

Zhe Wang ◽

Bangcheng Zhang ◽

...

Keyword(s):

Chemical Analysis ◽

Energy Loss ◽

Check Valve ◽

Experimental Results ◽

Piezoelectric Pump ◽

Output Pressure ◽

Pressure Characteristic ◽

Analysis System ◽

Experiment Analysis ◽

High Output

Piezoelectric pumps are applied in many fields, such as chemical analysis system and fluid pumping systems. Piezoelectric pumps with high output pressure can meet the needs of more fields. This article introduces the design and fabrication of a high output pressure piezoelectric pump with straight arm wheeled check valve. In this paper, the influence of straight arm wheeled check valve on the output pressure of piezoelectric pump is deeply discussed from the aspect of energy loss. This study investigated the effect of valve arm number ( N = 2, 3,4, and 5), the valve arm width ( W = 0.8, 1.0, and 1.2 mm), and the valve arm length ( L = 1.92, 2.02, and 2.12 mm) on the output pressure of piezoelectric pump. The output pressure characteristic of straight arm wheeled check valve piezoelectric pump with different valve parameters is obtained by experiment. Experimental results show that when N = 4, W = 1.0 mm, L = 2.02 mm, the output pressure of the straight arm wheeled check valve piezoelectric pump has the best output pressure of 27.41 kPa at 220 V and 85 Hz. This study provides a reference for the further application of piezoelectric pumps in fluid pumping field.

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Improving Output Performance of a Resonant Piezoelectric Pump by Adding Proof Masses to a U-Shaped Piezoelectric Resonator

Micromachines ◽

10.3390/mi12050500 ◽

2021 ◽

Vol 12 (5) ◽

pp. 500

Author(s):

Jian Chen ◽

Wenzhi Gao ◽

Changhai Liu ◽

Liangguo He ◽

Yishan Zeng

Keyword(s):

Flow Rate ◽

Maximum Flow ◽

Working Fluid ◽

Driving Voltage ◽

Piezoelectric Resonator ◽

Piezoelectric Pump ◽

Compact Structure ◽

Output Performance ◽

Volume Efficiency ◽

Working Efficiency

This study proposes the improvement of the output performance of a resonant piezoelectric pump by adding proof masses to the free ends of the prongs of a U-shaped piezoelectric resonator. Simulation analyses show that the out-of-phase resonant frequency of the developed resonator can be tuned more efficiently within a more compact structure to the optimal operating frequency of the check valves by adjusting the thickness of the proof masses, which ensures that both the resonator and the check valves can operate at the best condition in a piezoelectric pump. A separable prototype piezoelectric pump composed of the proposed resonator and two diaphragm pumps was designed and fabricated with outline dimensions of 30 mm × 37 mm × 54 mm. Experimental results demonstrate remarkable improvements in the output performance and working efficiency of the piezoelectric pump. With the working fluid of liquid water and under a sinusoidal driving voltage of 298.5 Vpp, the miniature pump can achieve the maximum flow rate of 2258.9 mL/min with the highest volume efficiency of 77.1% and power consumption of 2.12 W under zero backpressure at 311/312 Hz, and the highest backpressure of 157.3 kPa under zero flow rate at 383 Hz.

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