Electronic fluid pump with an encapsulated stator assembly
AssigneeEngineered Machined Products, Inc.
InventorsMark Bader, Michael P. Lasecki, Steven Shiverski, Kenneth A. DeGrave, Jeremy S. Carlson
Life of this patent
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Abstract
A fluid pump includes a pump housing having a housing cavity with an inlet and an outlet. An encapsulated stator assembly is positioned within the housing cavity and at least partially defines a fluid passage from the inlet to the outlet. A polymeric capsule member encloses and seals the encapsulated stator assembly, protecting the motor from, and providing heat transfer to, the working fluid. A stator provides a magnetic field which drives a rotor assembly. The rotor assembly rotates an impeller for pumping fluid from the inlet to the outlet.
Claims21
A fluid pump, comprising:
- a housing having a housing cavity therein with an inlet and an outlet;
- an impeller rotatably positioned at the inlet and having an impeller axis;
- an encapsulated stator assembly enclosed and sealed by a polymeric capsule member, the polymeric capsule member defining a rotor cavity having an opening, and orienting motor power leads with substantial circumferential symmetry around the impeller axis, the encapsulated stator assembly including a plurality of steel laminations, a plurality of copper windings, and a plurality of motor power leads;
- a rotor assembly rotatably located inside the rotor cavity and connected to the impeller for rotating the impeller for pumping fluid through the passage from the inlet to the outlet;
- and
- a seal cartridge assembly positioned within the opening for sealing the rotor assembly within the rotor cavity.
A fluid pump, comprising:
- a housing having a housing cavity therein with an inlet and an outlet;
- an encapsulated stator assembly enclosed and sealed by a polymeric capsule member, the polymeric capsule member being separate from the housing and enclosing the stator assembly in such a way as to provide substantial contact with outer peripheral surfaces of the stator assembly, thereby minimizing voids therebetween and facilitating conductive heat transfer between the stator assembly and the capsule member, wherein the polymeric capsule member defines a rotor cavity having an opening;
- and
- wherein an outer wall of the polymeric capsule member has a plurality of diffuser vanes molded integrally thereon, the diffuser vanes being separate from the housing.
A fluid pump, comprising:
- a housing having a housing cavity therein with an inlet and an outlet;
- an encapsulated stator assembly enclosed and sealed by a polymeric capsule member;
- wherein the encapsulated stator assembly contains a plurality of motor power leads encased in the polymeric capsule member, and having exposed ends, the motor power leads being at least partially within the fluid flow path;
- and
- a circuit board assembly positioned near the outlet and interfacing with the ends of the motor power leads.
A fluid pump, comprising:
- a housing having a housing cavity therein with an inlet and an outlet;
- an impeller rotatably positioned at the inlet and having an impeller axis;
- an encapsulated stator assembly enclosed and sealed by a polymeric capsule member, the polymeric capsule member defining a rotor cavity having an opening, and orienting motor power leads with substantial circumferential symmetry around the impeller axis, the encapsulated stator assembly including a plurality of steel laminations, a plurality of copper windings, and a plurality of motor power leads;
- and
- wherein the polymeric capsule member comprises a thermally conductive, electrically insulative material.
Dependencies are inferred from the claim text.