Working Paper Article Version 1 This version is not peer-reviewed

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

Version 1 : Received: 20 July 2021 / Approved: 21 July 2021 / Online: 21 July 2021 (10:12:28 CEST)

How to cite: Zehetbauer, T.; Plöckinger, A.; Emminger, C.; Çakmak, U.D. Mechanical Design and Performance Analyses of a Rubber-Based Peristaltic Micro-Dosing Pump. Preprints 2021, 2021070480 Zehetbauer, T.; Plöckinger, A.; Emminger, C.; Çakmak, U.D. Mechanical Design and Performance Analyses of a Rubber-Based Peristaltic Micro-Dosing Pump. Preprints 2021, 2021070480

Abstract

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 de-sign (3) was realized, with the fluid’s flexible transport channel formed by a solid cavity and the 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 valida-tions 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, analyti-cal model was derived and validated by characterizing the pump prototype.

Subject Areas

hydraulic pump; micro-dosing; peristaltic; hyper-elasticity; viscoelasticity; holistic design methodology; elastomer compound

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