초록 ▼

The centrifugal blood pump has a pump rotor (15) arranged inside a housing (13) which is closed with the exception of a blood outlet (15′) and a blood inlet (14). The rotatable pump rotor (15) inside the housing (13) is driven by an external drive motor (10) via a magnetic coupling. The magnetic cou

The centrifugal blood pump has a pump rotor (15) arranged inside a housing (13) which is closed with the exception of a blood outlet (15′) and a blood inlet (14). The rotatable pump rotor (15) inside the housing (13) is driven by an external drive motor (10) via a magnetic coupling. The magnetic coupling is provided by thin exterior permanent magnets (21) circumferentially distributed around the rotor (15) on a coupling part (12,20) connected to the external drive motor (10) and correspondingly thin circumferentially distributed permanently magnetized ferromagnetic regions (17,18) of the pump rotor which are coupled with the permanent magnets (21) to form a magnetic field bridge (22) and thus to avoid axially directed tilting or tipping moments. The pump rotor (15) can be additionally stabilized against translational motion in the radial direction by a mechanical bearing device (24) for the rotor which is provided inside an interior space through which blood flows in the pump housing.

대표청구항 ▼

Centrifugal blood pump comprising a housing (13) provided with at least one blood outlet (15′) and at least one blood inlet (14) and closed in a liquid and gas-tight manner except at the at least one blood outlet (15′) and at least one blood inlet (14), a rotatable pump rotor (15) arranged inside th

Centrifugal blood pump comprising a housing (13) provided with at least one blood outlet (15′) and at least one blood inlet (14) and closed in a liquid and gas-tight manner except at the at least one blood outlet (15′) and at least one blood inlet (14), a rotatable pump rotor (15) arranged inside the housing (13) and provided with a number of ferromagnetic regions (17,18) distributed uniformly circumferentially in the pump rotor, an external drive motor (10) outside the housing (13) and means for magnetic coupling of the pump rotor (15) and the drive motor (10) to drive the pump rotor (15) rotatably, wherein said means for magnetic coupling of the pump rotor (15) and the drive motor (10) include a rotational coupling part (12,20) attached to the drive motor (10) to be rotatably driven thereby and arranged outside of the housing (13) and a number of permanent magnets (21) distributed uniformly around a circumference of the rotational coupling part (12,20) so that said pump rotor (15) is driven and rotationally stabilized by action of the permanent magnets (21) mounted on the rotational coupling part (12,20) on the ferromagnetic regions (17,18) of the pump rotor (15), wherein the permanent magnets (21) have a height (hp) in an axial direction of the pump rotor (15) at least approximately equal to a height (hf) of the ferromagnetic regions (17,18) of the pump rotor (15) in the axial direction of the pump rotor.