Magnetically engaged pump

A magnetically engaged gear pump comprising

• a gear pump housing;
• a rotatable magnetic drive assembly disposed in the gear pump housing and having an axial recess;
• a cylindrical canister including at least a portion of the canister disposed within the axial recess of the rotatable magnetic drive assembly, and being in sealing engagement with the gear pump housing;
• a rotatable driven magnet assembly including magnets disposed substantially within the cylindrical canister in magnetic engagement with the rotatable magnetic drive assembly;
• a pump rotor rotatable with the rotatable driven magnet assembly;
• a shaft concentrically positioned within the rotatable driven magnet assembly;
• a rotatable carrier disposed about the shaft, the rotatable carrier including a radial attachment flange fixable to the rotatable driven magnet assembly and being axially removable through the pump rotor from the rotatable driven magnet assembly, a bore through the rotatable carrier receiving the shaft;
• at least one plain bushing in the bore of the rotatable carrier;
• at least one thrust bushing on the rotatable carrier about the bore;
• a rotatable gear wheel being mounted in the gear pump housing and engaging the rotor.

A magnetically engaged pump comprising

• a pump housing including a shaft in the housing;
• a magnetic coupling in the pump housing including a rotatable magnetic drive, a rotatable driven magnet assembly inwardly of the rotatable magnetic drive and a cylindrical canister extending between the rotatable magnetic drive and the rotatable driven magnet assembly, the rotatable driven magnet assembly having a concentric cavity;
• a pump rotor engaged with the rotatable driven magnet assembly and including an axial passage;
• a carrier including a bore rotatably disposed about the shaft, a thrust bushing radially outwardly of the bore on an end of the carrier and at least one plain bushing in the bore bearing on the shaft, the carrier being within the concentric cavity and fitting through the axial passage for removal from the pump with the pump rotor engaged with the rotatable driven magnet assembly and the rotatable driven magnet assembly magnetically engaged with the rotatable magnetic drive, the at least one plain bushing and the thrust bushing being separable from the carrier.