Centrifugal fluid pump with failure correction

摘要

A centrifugal fluid pump apparatus (1) includes a control mechanism (6); and a body 5 including a pump section (2) having an impeller (21) rotating inside a housing (20); a rotor (31) having an impeller attraction magnet (33); a motor (34) for rotating the rotor (31); an impeller attraction electromagnet (41) for attracting the impeller (21) thereto; an impeller-position detection sensor (42); and a groove (38) for hydrodynamic bearing provided on an inner surface of the housing (20). The control mechanism (6) has a position sensor output monitoring function (56) or an electromagnet current monitoring function (57), a motor current monitoring function; and an emergency impeller rotation function. The impeller rotation function operates when the sensors (42) or the electromagnet (41) has a failure by using the position sensor output monitoring function (56) or the electromagnet current monitoring function (57) to rotate the impeller (21) by utilizing the groove (38) for hydrodynamic bearing.