Cross-sectional scheme of electromagnetic diaphragm pump with electromagnet with variable pole area.

Abstract

1- pump body; 2-single-direction valve; 3-diaphragm; 4-spring; 5-electromagnetic coil; 6-ejector pin; 7-the iron core; 8-magnetic isolation ring; 9-the inner armature; 10-the outer armature; 11-sleeve.</p