Pump motor
AssigneeMerkle-Korff Industries, Inc.
InventorsBruce Ley, Justin Mumaw, Justin Anteau
Life of this patent
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Abstract
An electric pump motor is provided. The motor includes a stator assembly including a magnetic stator component and an overmolded stator casing sealingly encapsulating the magnetic stator component. A rotor assembly that is rotatable about an axis includes a rotor shaft extending along the axis, a magnetic rotor component, and an overmolded rotor casing fixedly interconnecting the rotor shaft and magnetic rotor component. The rotor shaft is connected to an impeller that imparts a thrust load on the rotor shaft. The rotor and stator assemblies are configured so that the magnetic components induce a solenoid force on the rotor shaft opposite the thrust load.
Claims37
A pump assembly comprising:
- a pump including a rotatable impeller housed within a pump chamber;
- and
- a pump motor including—
- a rotor assembly including a rotor shaft that extends along a rotational axis and is connected to the impeller for rotational movement therewith, with rotation of the impeller imparting a thrust load on the rotor shaft in a first axial direction,
- said rotor assembly including a magnetic rotor component that is fixed to the rotor shaft for rotational movement therewith;
- and
- a stator assembly including a magnetic stator component,
- said magnetic components cooperatively defining a magnetic zero condition, in which magnetic fields generated by the magnetic components exert substantially no axial force on the rotor shaft,
- said rotor and stator assemblies being configured so that the magnetic components are out of the magnetic zero condition during motor operation, with the magnetic fields thereby inducing a solenoid force on the rotor shaft in a second axial direction opposite the first axial direction.
A motor for powering a liquid pump, wherein the pump includes a rotatable impeller housed within a pump chamber, said motor comprising:
- a rotor assembly rotatable about an axis,
- said rotor assembly being connectable to the impeller;
- and
- a stator assembly including a magnetic stator component and an overmolded stator casing sealingly encapsulating the magnetic stator component.
A motor comprising:
- a stator assembly;
- and
- a rotor assembly rotatable about an axis relative to the stator,
- said rotor assembly including—
- a rotor shaft extending along the axis,
- a magnetic rotor component, and
- an overmolded rotor casing fixedly interconnecting the rotor shaft and magnetic rotor component.
Dependencies are inferred from the claim text.