Magnetic drive pump assembly with integrated motor

摘要

Embodiments of the invention provide a pump assembly and a method for assembly the pump assembly. The pump assembly includes a stator assembly, a lower pump housing, an upper pump housing, a rotor assembly, and an isolation cup. The method includes coupling the stator assembly to the lower pump housing, overmolding an overmold material over the stator assembly and the lower pump housing, positioning the isolation cup over the overmold, and positioning the rotor assembly inside the isolation cup. The method further includes placing the upper pump housing over the rotor assembly and coupling the upper pump housing to the lower pump housing.

主权项

1. A pump assembly for pumping a fluid, the pump assembly comprising:
a first pump housing; a second pump housing removably coupled to the first pump housing; a motor assembly including a rotor assembly and a stator assembly, the stator assembly positioned inside the first pump housing, and the rotor assembly including a rotor and an impeller; an overmold covering the stator assembly and an inside portion of the first pump housing; a static shaft and a pair of axially spaced bearings for mounting the rotor assembly on the static shaft for rotation about the static shaft; and an isolation cup positioned inside the first pump housing and coupled to the first pump housing, the rotor assembly positioned inside the isolation cup, wherein the isolation cup is arranged and configured to provide a fluid seal between the overmold and the rotor assembly, wherein the isolation cup includes a groove for holding one of the pair of bearings in a correct position.