Pump for conveying fluid from suction region in discharge region, has two concentric rows of magnets or two concentrically arranged ring magnets, and piston element that comprises two permanent magnets held at distance from each other

摘要

The pump (1) has a housing (4) and a rotor (6), which is driven by a drive element (7). A piston element is arranged in a bore (8) of the rotor. Two concentric rows of magnets or two concentrically arranged ring magnets (10,11) are arranged in the housing. The piston element comprises two permanent magnets, which are held at a predetermined distance from each other. The magnets or the ring magnets exert magnetic force of attraction on the piston element. The permanent magnets are held at a distance by a distance piece that is made of soft iron.