The Combination of Micro Diaphragm Pumps and Flow Sensors for Single Stroke Based Liquid Flow Control

Jenke, Christoph; Rubio, Jaume Pallejà; Kibler, S.; Häfner, Johannes; Richter, M.; Kutter, Christoph

doi:10.3390/s17040755

Cited by 24 publications

(11 citation statements)

References 46 publications

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“…Other research activities pursue the application of smart (soft) electroactive materials [9,10] in peristaltic pumps. Furthermore, the combination of (micro)pumps with flow sensors is shown by Jenke et al [11] and others to ensure closed loop controlled micro-dosing. However, the degree of complexity is increasing by the implementation of the additional sensors.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Design and Performance Analyses of a Rubber-Based Peristaltic Micro-Dosing Pump

et al. 2021

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Low pressure fluid transport (1) applications often require low and precise volumetric flow rates (2) including low leakage to reduce additional costly and complex sensors. A peristaltic pump design (3) was realized, with the fluid’s flexible transport channel formed by a solid cavity and a wobbling plate comprising a rigid and a soft layer (4). In operation, the wobbling plate is driven externally by an electric motor, hence, the soft layer is contracted and unloaded (5) during pump-cycles transporting fluid from low to high pressure sides. A thorough characterization of the pump system is required to design and dimension the components of the peristaltic pump. To capture all these parameters and their dependencies on various operation-states, often complex and long-lasting dynamic 3D FE-simulations are required. We present, here, a holistic design methodology (6) including analytical as well as numerical calculations, and experimental validations for a peristaltic pump with certain specifications of flow-rate range, maximum pressures, and temperatures. An experimental material selection process is established and material data of candidate materials (7) (liquid silicone rubber, acrylonitrile rubber, thermoplastic-elastomer) are directly applied to predict the required drive torque. For the prediction, a semi-physical, analytical model was derived and validated by characterizing the pump prototype.

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Section: Introductionmentioning

confidence: 99%

Mechanical Design and Performance Analyses of a Rubber-Based Peristaltic Micro-Dosing Pump

et al. 2021

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“…Piezoelectric pumps have the advantages of simple structure, high driving strength, easy miniaturization, no magnetic influence and low noise [ 1 , 2 , 3 , 4 , 5 ], etc. They can be applied to biomedical [ 6 , 7 , 8 ], microelectromechanical systems [ 9 , 10 ] and fuel cells [ 11 , 12 ]. However, the current output performance of piezoelectric pumps is generally low, which limits their application in many fields.…”

Section: Introductionmentioning

confidence: 99%

Research on Inlet and Outlet Structure Optimization to Improve the Performance of Piezoelectric Pump

Zhao

Wang

et al. 2020

Micromachines

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As piezoelectric pumps are used in more fields, they are gradually failing to meet the application requirements due to their low output performance. Therefore, improving the output performance of piezoelectric pumps helps to expand their applications. This paper argued that the dynamic load of liquid in the inlet and outlet pipelines was an important factor that weakened the performance of piezoelectric pumps. Therefore, in order to reduce the dynamic load, it was proposed to replace the conventional piezoelectric pump inlet and outlet by an elastic inlet and outlet. After introducing the structure and working principle of elastic inlet and outlet, the mechanism of reducing the dynamic load by elastic inlet and outlet was analyzed. Then, the influence of the elastic cavity height on the performance of the piezoelectric pump was studied from both fluid simulation and theoretical analysis. Finally, several prototypes were made. The effectiveness of the elastic inlet and outlet on improving the performance of the prototype and the effect of the elastic cavity height on the performance of the prototype were tested, respectively. The test results showed that the elastic inlet and outlet effectively improved the flow rate and output backpressure without increasing the maximum output backpressure. The maximum flow rate of the pump system without load was increased by 36%. In addition, the elastic cavity height adversely affected the flow rate and output backpressure of the prototypes, but had no effect on the maximum output backpressure. In summary, the elastic inlet and outlet can effectively increase the output performance of the piezoelectric pump, but the design height should be appropriately reduced.

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“…Piezoelectric pumps can be used in many fields (e.g., medicine, MEMS and fuel cells) for their advantages of simple structure, high actuation strength, easy miniaturization, no magnetic influence and low noise [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 ]. In recent years, with the continuous expansion of the application field of piezoelectric pumps, many new application fields that require piezoelectric pumps to have higher output performance have appeared.…”

Section: Introductionmentioning

confidence: 99%

A Theoretical and Experimental Study of a Piezoelectric Pump with Two Elastic Chambers

Zhao

Guo

2020

Sensors

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The paper is a continuation of our work on the dynamic load in piezoelectric pumps. In the study, the dynamic load of liquid in the pipelines was proposed as a key factor that limits the output performance of piezoelectric pumps. To decrease the dynamic load, a piezoelectric pump with two elastic chambers was proposed in our previous published work. In this paper, the performance and key parameters of the piezoelectric pump with two elastic chambers were studied through theoretical analyses and experimental tests. After establishing the mathematical model of the piezoelectric pump with two elastic chambers, the paper theoretically analyzed the performance of the pump and the effect of different structural parameters on the performance. Then prototypes with a range of structural parameters were developed and tested. As revealed from the test results, the elastic chamber effectively decreased the dynamic load of the liquid in the pipelines and the flow rate of the prototype with two elastic chambers was higher than that of the prototype with one or no elastic chamber. However, the elastic chamber did not lead to the increase in the maximum output backpressure of the prototype. Adopting an elastic diaphragm exhibiting a smaller stiffness or a larger diameter could help decrease the dynamic load of the liquid. The elastic chamber more significantly impacted the flow rate of the piezoelectric pump with long pipelines. The pump chamber height had a significant effect on the output performance of the piezoelectric pump with two elastic chambers, which is consistent with the conventional piezoelectric pump. At the height of 0.2 mm, the flow rate of the prototype with two elastic chambers was peaked at 7.7 mL/min; at the height of 0.05 mm, the output backpressure reached the highest of 28.2 kPa. The dynamic load could decrease the amplitude of the piezoelectric vibrator, whereas the prototype with two elastic chambers could effectively reduce the impact of dynamic load on the piezoelectric vibrator. The flow rate decreased almost linearly with the backpressure. Under the same backpressure, the flow rate of the prototype with two elastic chambers was higher than that of the prototype without elastic chamber, and the flow rate difference between the two prototypes gradually decreased with the backpressure.

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The Combination of Micro Diaphragm Pumps and Flow Sensors for Single Stroke Based Liquid Flow Control

Cited by 24 publications

References 46 publications

Mechanical Design and Performance Analyses of a Rubber-Based Peristaltic Micro-Dosing Pump

Mechanical Design and Performance Analyses of a Rubber-Based Peristaltic Micro-Dosing Pump

Research on Inlet and Outlet Structure Optimization to Improve the Performance of Piezoelectric Pump

A Theoretical and Experimental Study of a Piezoelectric Pump with Two Elastic Chambers

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