Electric fluid pump
AssigneeHitachi Automotive Systems, Ltd.
InventorShigeo KUBA
Life of this patent
Estimating the term…
Abstract
An electric fluid pump includes a rotor including a permanent magnet, and including a radially outer peripheral surface covered by resin. An impeller faces a first axial end side of the rotor. A support shaft is disposed in a hole, wherein the hole extends axially of the rotor and the impeller, and through radially inside of the rotor and the impeller. A plain bearing part is configured to support the rotor and the impeller rotatably with respect to the support shaft. A first groove is formed in the radially outer peripheral surface of the rotor, and extends from the first axial end side of the rotor to a second axial end side of the rotor opposite to the first axial end side.
Claims15
An electric fluid pump comprising:
- a rotor including a permanent magnet, and including a radially outer peripheral surface covered by resin;
- an impeller facing a first axial end side of the rotor;
- a support shaft disposed in a hole, wherein the hole extends axially of the rotor and the impeller, and through radially inside of the rotor and the impeller;
- a plain bearing part configured to support the rotor and the impeller rotatably with respect to the support shaft;
- and
- a first groove formed in the radially outer peripheral surface of the rotor, and extending from the first axial end side of the rotor to a second axial end side of the rotor opposite to the first axial end side.
An electric fluid pump comprising:
- a rotor including a permanent magnet;
- an impeller facing a first axial end side of the rotor;
- a support shaft disposed in a hole, wherein the hole extends axially of the rotor and the impeller, and through radially inside of the rotor and the impeller;
- a plain bearing part configured to support the rotor and the impeller rotatably with respect to the support shaft;
- a first groove formed in a radially outer peripheral surface of the rotor, and extending from the first axial end side of the rotor to a second axial end side of the rotor opposite to the first axial end side;
- and
- a second groove formed in an axial end surface of the second axial end side of the rotor, and extending from a radially inside end side of the rotor to a radially outside end side of the rotor.
An electric fluid pump comprising:
- a rotor configured to be rotationally driven by an electromagnetic force;
- an impeller disposed coaxially with the rotor;
- a support shaft disposed in a hole, and configured to support the rotor and the impeller rotatably through a plain bearing part, wherein the hole extends axially of the rotor and the impeller, and through radially inside of the rotor and the impeller;
- and
- an outflow forcing system configured to force part of fluid by centrifugal force acting on the fluid to flow out to a second axial end side of the impeller and the rotor through a clearance between the support shaft and the hole, wherein the fluid is sucked by rotation of the impeller from a first axial end side of the impeller and the rotor opposite to the second axial end side.
Dependencies are inferred from the claim text.