Patent ID: 9133847
Filing Date: 2015-09-15
Classification: A61M,F04D,F16C,H02K,H02N

Abstract:
1. A disposable magnetically-levitated centrifugal pump comprising a pump head section and a pump section, characterized in that, the pump head section which comprises: a cylindrical rotor, which is made from magnetic material and has a ring-shaped rotor body, the cylindrical rotor having rotor protrusions at upper part and at lower part of internal circumference surface of the ring-shaped rotor body, the protrusions having specified width and protruding toward an inside direction of the ring-shaped rotor body; an impeller which rotates accompanying with rotation of the cylindrical rotor; and a pump head housing which comprises: wherein the pump section comprises: a stator which has: a motor which is coupled to a rotating shaft inserted from the side of another end section of the stator to the side of the one end section, and which drives the torque transmission disc; a displacement sensor which is disposed on the stator and measures displacement in radial directions of the rotor; and a pump housing which comprises the stator, the torque transmission disc, the motor and the displacement sensor, the pump housing being able to accommodate the pump head section in a manner that the pump head section is inserted to and removed from, wherein the stator further comprises an electro-magnet core which has a bottom plate section having a shaft hole going through the rotating shaft at the center, mounting sections which rise parallel to and in the same direction as the rotating shaft from end points of the bottom plate section, and one or a plurality of stator protrusion sections which protrude toward the central axis of the shaft hole on the upper part side of the mounting section, wherein the electro-magnet core is configured to magnetically couple with the lower ring shaped permanent magnet, wherein the electromagnets for magnet bearings are formed by winding a coil around the electro-magnet core, and wherein the torque transmission disc is fixed on the rotating shaft so that the upper ring-shaped permanent magnet is disposed against the rotor in the rotor insertion section and the upper ring-shaped permanent magnet and the lower ring-shaped permanent magnet are at a position between a top of the stator protrusions sections and the bottom plate section, wherein the bottom plate section, the mounting sections and the stator protrusion section are made from magnetic material, wherein the magnetic flux from the electro-magnet core enters the lower ring shaped permanent magnet from the bottom section of the lower ring shaped permanent magnet through the bottom plate section of the electro-magnet core.