Mechanically-electrically separated pump

A mechanically-electrically separated pump, comprising:

• a centrifugal pump, having a central axis and comprising a pump casing, an impeller, and a connecting base, wherein a cavity is formed in the pump casing;
• an inlet and an outlet are respectively formed on the pump casing;
• the inlet and the outlet respectively communicate with a center of the cavity and a peripheral side of the cavity;
• an axial portion is formed on a middle of the cavity;
• the central axis passes through a center of the axial portion;
• a center of the impeller has an axial hole and a periphery of the impeller has a plurality of blades;
• the axial hole is rotatably sleeved on the axial portion;
• the impeller is magnetized or induced to generate a plurality of different magnetic domains;
• the connecting base is connected to a side of the pump casing along the central axis;
• and
• an impeller driver, comprising a driver casing and a stator, wherein a connecting portion is formed at an end of the driver casing;
• the connecting portion is detachably connected to the connecting base of the centrifugal pump;
• a stator seat is formed in the driver casing;
• the stator comprises a plurality of stator modules;
• the plurality of stator modules surround the stator seat, are spaced from one another, and are engaged with the stator seat;
• the central axis passes through the center of the impeller and a center of an area surrounded by the plurality of stator modules;
• the impeller is spaced apart and located outside an end of the plurality of stator modules along the central axis, so that the impeller is driven by a magnetic field generated by the plurality of stator modules.