Fluid pump

Patent metadata

Field	Value
Publication number	US-11078904-B2
Application number	US-201615569708-A
Country	US
Kind code	B2
Filing date	Apr 28, 2016
Priority date	Apr 28, 2015
Publication date	Aug 3, 2021
Grant date	Aug 3, 2021

Abstract

The invention relates to a fluid pump, driven by means of an electric motor, which is coupled to a pump rotor of the fluid pump, wherein the electric motor is an axial-flux electric motor, the electric-motor rotor of which is also the pump rotor, and the pump rotor and the electric-motor rotor are accommodated in a common housing, in which the pump rotor and the electric-motor rotor rotate while integrated as combination rotor in a disk shape, wherein the common housing has a fluid inlet and a fluid outlet to the combination rotor. The invention further relates to a production method for such a fluid pump.

First claim

The invention claimed is:

1. A fluid pump, driven by an electric motor which is coupled to a combination rotor serving as a pump rotor of the fluid pump, wherein the electric motor is an axial flux electric motor, in which the combination rotor also serves as an electric motor rotor for the axial flux electric motor, and the combination rotor serving as the pump rotor and the electric motor rotor is accommodated in a common housing in which the pump rotor and the electric motor rotor rotate in an integrated fashion in a shape of a disk as the combination rotor, wherein the common housing has a fluid inflow and a fluid outflow to and from the combination rotor; and in that a first stator of the axial flux electric motor surrounds the combination rotor on a first end side, and a second stator of the axial flux electric motor surrounds the combination rotor on a second end side, opposite the first end side, of the common housing; wherein a first set of cores of the first stator and a second set of cores of the second stator lie opposite one another, offset in a circumferential direction with respect to one another and axis-parallel with respect to a rotational axis of the combination rotor and wherein such offset results in the cores being non-coaxial among the first and second sets.

2. The fluid pump as claimed in claim 1 , wherein a pump chamber and magnets or soft-magnetic elements of the axial flux electric motor, which are oriented axially with respect to the rotational axis of the combination rotor, are arranged extending from said rotational axis when viewed in a radial direction.

3. The fluid pump as claimed in claim 1 , wherein in the combination rotor, a multiplicity of axially oriented magnets or soft-magnetic elements are distributed along a circumference of the combination rotor.

4. The fluid pump as claimed in claim 1 , wherein at least one of the first and second stator of the axial flux electric motor is arranged at the first or the second end sides with respect to the combination rotor, wherein the cores of the at least one of the first and second stator, which are oriented axis-parallel with respect to the rotational axis of the combination rotor, have at least partially a soft-magnetic material.

5. The fluid pump as claimed in claim 4 , wherein the common housing has a nonmagnetic material, at least in a region between the combination rotor and the cores of at least one of the first and second stator.

6. The fluid pump as claimed in claim 1 , wherein a pump chamber is closed off in the common housing, and the fluid inflow and/or the fluid outflow to and from the pump chamber occurs axially along the rotational axis through the axial flux electric motor.

7. The fluid pump as claimed in claim 1 , wherein the combination rotor has a co-rotating pump wheel which rotates with the combination rotor, wherein a shaft of the combination rotor is arranged and mounted inside the common housing.

8. The fluid pump as claimed in claim 1 , wherein the combination rotor rotates about a rotational axis in the common housing, wherein a co-rotating pump wheel which rotates, with the combination rotor is seated on the rotational axis.

9. The fluid pump as claimed in claim 1 , wherein a first and a second shaft end of a shaft or of the rotational axis of the combination rotor respectively end in the common housing.

10. A method for manufacturing a fluid pump, having the following steps:
manufacturing a combination rotor as a pump rotor and an electric motor rotor of a disk design with axial arrangement of magnets or soft-magnetic elements in the combination rotor; wherein a first stator of an axial flux electric motor surrounds the combination rotor on a first end side, and a second stator of the axial flux electric motor surrounds the combination rotor on a second end side, opposite the first end side, of a common housing; wherein a first set of cores of the first stator and a second set of cores of the second stator lie opposite one another, offset in a circumferential direction with respect to one another and axis-parallel with respect to a rotational axis of the combination rotor and wherein such offset results in the cores being non-coaxial among the first and second sets,
insertion of the combination rotor into an outer ring,
insertion of a shaft or axle,
lateral attachment of at least one side wall to the outer ring to provide fluid-tight sealing of the combination rotor accommodating an end of the shaft or axle in the at least one side wall,
lateral attachment of at least one of the first or second stator of the axial flux electric motor to the at least one side wall in order to drive the combination rotor in the common housing by at least the outer ring and the at least one side wall, wherein the cores of the first and second stator are arranged axis-parallel with respect to the rotational axis of the combination rotor.

11. The method as claimed in claim 10 , wherein the cores of the first or second stator are pressed and manufactured from a soft-magnetic material.

Assignees

• Gkn Sinter Metals Engineering Gmbh

Inventors

• Bornemann Nils
• Tiller Stefan
• Casellas Antonio
• Aydin Ümit

Classifications

• F04C15/008 Primary

  Prime movers · CPC title

• F04C2/102 Primary

  the two members rotating simultaneously around their respective axes · CPC title

• F04C2240/40

  Electric motor · CPC title