Magnetisch aufgehängte Pumpe mit Magnetlagervorrichtungen

摘要

In a magnetically levitated pump (1), an impeller-side ferromagnetic body (51) (second ferromagnetic body) provided on a circumferential surface of an impeller (23) facing a casing unit (50) on the side of a position sensor and a casing-side ferromagnetic body (52) (third ferromagnetic body) opposite to the impeller-side ferromagnetic body (51) (second ferromagnetic body) to attract the impeller (23) toward the casing unit (50) on the side of the position sensor are adapted to have opposite portions of mutually different shapes, so that the maximum required attractive force (f2) of an electro-magnet (31) for magnetic bearing is suppressed and length (L5) of the electro-magnet for magnetic bearing is made shorter.