Design and Fabrication of Pneumatically Actuated Valveless Pumps

Abstract

In this study, a valveless pump was successfully designed and fabricated for the purpose of medium transportation. Different from traditional pumps, the newly designed pump utilizes an actuated or a deflected membrane, and it serves as the function of a check valve at the same time. For achieving the valveless property, an inlet or outlet port positioned in an upper- or lower-layer thin membrane was designed to be connected to an entrance or exit channel. Theoretical analysis and numerical simulation were conducted simultaneously to investigate the large deformation characteristics of the membranes and to determine the proper location of the inlet or outlet port on the proposed pump. Then, the valveless pump was fabricated on the basis of the proposed design. In the experiment, the maximum flow rate of the proposed pump exceeded 12.47 mL/min at a driving frequency of 5.0 Hz and driving pressure of 68.95 kPa.

Characterization of a Droplet Containing the Clustered Magnetic Beads Manipulation by Magnetically Actuated Chips

“…These valves can generally be categorized as check valves [ 5 ], flapping valves [ 6 , 7 ], or peristaltic valves [ 8 , 9 ]. In achieving valveless pumping, mechanical micropumps have been successfully developed with simple geometries [ 10 ]. However, these valves with mechanical micropumps can damage and clog the cells or particles in the process of fluid flow [ 11 ].…”

High-Efficiency 3D-Printed Three-Chamber Electromagnetic Peristaltic Micropump

“…Therefore, this paper theoretically analyzes the deformation variable of films through the Timoshenko model. In this model, it is assumed that is the same as in the literature, but is different [ 10 , 11 ]. There is therefore the following formula: …”