| 摘要 |
PROBLEM TO BE SOLVED: To provide a pump in which an impeller rotates on a wear-free hydrodynamic bearing and magnetic bearing, and the impeller in contact with only blood within the pump can move the blood from a pump inlet to a pump outlet.SOLUTION: A rotary blood pump includes a casing defining a pumping chamber. The pumping chamber has a blood inlet and a tangential blood outlet. One or more motor stators are provided outside of the pumping chamber. A rotatable impeller is within the pumping chamber and is adapted to cause blood entering the pumping chamber to move to the blood outlet. The impeller has one or more magnetic regions. The impeller is radially constrained by one or more magnetic coupling and is axially constrained by one or more hydrodynamic thrust bearing surfaces 34 on the impeller. |
