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Development of a peristaltic micro-pump based on PZT bending actuators

: Gall, M.; Thielicke, B.; Huart, A.

Borgmann, H. ; Messe und Ausstellungs-GmbH, Bremen:
Actuator 2006. 10th International Conference on New Actuators & 4th International Exhibition on Smart Actuators and Drive Systems : 14 - 16 June 2006, Bremen, Germany; Conference proceedings
Bremen: Messe Bremen Ges., 2006
ISBN: 3-933339-08-1
International Conference on New Actuators <10, 2006, Bremen>
International Exhibition on Smart Actuators and Drive Systems <4, 2006, Bremen>
Conference Paper
Fraunhofer IWM ()
peristaltic micropump; finite element analysis; Piezoelectric composite; bimorph

This paper reports about the development of a piezoelectric micro-pump working on the peristaltic principle as it is known from the human gut and oesophagus. The proposed driving mechanism is an active tube made of a composite structure of active and passive materials. Our investigations are focusing on two principle applications: an implantable infusion pump for controllable drug dosage and a micro-pump for manufacturing processes in micro systems technology. Specifications include a target dosage of 1 to 15 µl per cycle which is to be realized with an active tube of 25 x 15 x 5 mm3 and a maximum allowable actuation voltage of 60 V. Different compositions of the active tube, using the piezoelectric transverse (d31) or the longitudinal (d33) mode, were numerically investigated and evaluated. On the basis of these results improved materials and material set-ups are proposed. The final objective of the project is the realization of a fully functioning prototype.