Electromagnetically Actuated Valveless Micropump in Polymer-Technology
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The 12h Mechatronics Forum Biennial International Conferernce
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n this contribution the design and the implementation of a low-cost and easy-to-manufacture recipro- cating micropump is presented. The pump uses electromagnetic actuation with hydrodynamic nozzle- diffuser valves comprising no moving parts. First, the idea and the principle of membrane-based recipro- cating micropumps are introduced. Then, considerations are discussed how to design the electrodynamic actuator which was devised for applications with planar coils using a neodymium permanent magnet and a highly permeable iron-cobalt alloy core. Furthermore, a theoretical investigation of the nozzle- diffuser valves including an optimization to achieve maximum flow rates is presented. It was possible to find a solution where the optimum opening angle of the diffuser can be expressed as a function only depending on the dimensionless Reynolds number Re. Theoretical results are discussed and compared to experimental data.