Artificial heart pump equipped with hydrodynamic bearing

An artificial heart pump includes a casing ( 4, 15 ) having a blood inflow port ( 5 ) in its upper part, a blood outflow port ( 6 ) in its side surface part and a plurality of electromagnets ( 22 ) on its inner peripheral surface; a fixed shaft ( 17 ) projecting from the bottom surface of the casing and having thrust receptacles ( 18, 16 ) at its upper and lower end parts ( 12, 10 ), respectively; an impeller section ( 2 ) having a blood inflow section ( 3 ) in its center part and a blood outflow section ( 9 ) in its side surface part; an impeller support member ( 7 ) supporting the impeller section from below and having on its outer peripheral surface a plurality of permanent magnets ( 2 ) and in its center a hole part fitted on the fixed shaft to rotatably support the impeller section within the casing; a radial hydrodynamic bearing part formed between the inner peripheral surface of the hole part of the impeller support member and the outer peripheral surface of the fixed shaft; and thrust hydrodynamic bearings formed between the upper and lower end faces of the impeller support member and the thrust receptacles at the upper and lower end parts of the fixed shaft, respectively, whereby the impeller member is supported without contacting either the casing or the fixed shaft and rotates stably.