Sealless integral-motor pump with regenerative impeller disk

A fluid pump comprising at least one stage, each said stage comprising:

• a housing having two axial endwalls and a radial sidewall, an inlet port, a discharge port, and a circumferential groove providing a fluid passage extending from said inlet port to said discharge port, said groove being interrupted between a downstream side of said discharge port and an upstream side of said inlet port;
• a shaft supported between the endwalls of said housing;
• a rotatable regenerative rotor disk mounted on said shaft and having a plurality of substantially radially oriented impeller vanes situated about the periphery thereof and extending into said fluid passage groove, said rotor disk having a plurality of permanent magnets embedded in a circular locus about said shaft, said magnets being sealed from pumped fluid;
• motor windings encased in each of said endwalls adjacent the permanent magnets of said rotor;
• and
• means for controlling a flow of electricity through said motor windings to rotatably drive said rotor disk.

A fluid pump comprising:

• a housing having two axially opposed endwalls, each said endwall having a circular recess bounded by a circumferentially extending fluid passage groove such that, when butted together, said recesses form a pumping chamber and said grooves form a fluid passage extending between at least one inlet port and one discharge port, said fluid passage having an interruption at an upstream edge of said inlet port and a downstream edge of said discharge port;
• a circular regenerative rotor disk within the pumping chamber between said housing endwalls, said rotor disk having a plurality of substantially radially extending impeller vanes arrayed about its periphery, and a plurality of permanent magnets embedded in a circular locus about the center of said rotor disk, said magnets being sealed against contact with pumped fluid;
• motor windings encased in each of said housing endwalls and sealed against contact with said pumped fluid for acting with said permanent magnets to rotatably drive said rotor disk;
• means for providing electric power to said motor windings;
• and
• means for rotatably supporting said rotor disk in said housing.