A new type of magnetic pump with coupled mechanical vibration and electromagnetic force

Abstract

There is a demand for intravenous drips for medical sites and for liquid delivery of microfluidic chips in the field of chemical analysis. Furthermore, in these chemical analysis and medical pumps, disposable is often required. In this paper, a new small size pump combining electromagnetic force and mechanical vibration was proposed. The small size pump of vibration type with an outer diameter of 19 mm and a height of 56 mm was prototyped, and the optimum design of the pump shape was carried out. In addition, by attaching an iron plate to the iron core of the electromagnet, a method of increasing the strength of the magnetic field at one pole of the electromagnet without changing the magnetic circuit was suggested. By the generation of an asymmetric magnetic field due to the addition of the iron material, the maximum efficiency of the pump was 10.7 %. This small size pump has a very simple structure and can deliver water to the pumping head exceeding 1000 mm.