Electrical machine with rotor shaft cooling channels
AssigneeRolls-Royce Deutschland Ltd & Co KG
InventorsMatthias Manig, Tobias Schumm
Life of this patent
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Abstract
An electrical machine is disclosed that has a stator and a rotor. The rotor, spaced apart radially from the stator, is configured to rotate about a longitudinal axis. An air gap extends between the rotor and the stator. The rotor has a rotor shaft having two end faces and a surface. A plurality of permanent magnets is connected to the rotor shaft and adjoin the air gap. The rotor shaft has, spaced apart radially from the air gap, a plurality of cooling channels that extend in the longitudinal direction between the end faces of the rotor shaft.
Claims20
An electrical machine comprising:
- a stator;
- a rotor spaced apart radially from the stator, wherein the rotor is configured to rotate about a longitudinal axis, and wherein the rotor comprises a rotor shaft having a first end face, a second end face, and a surface;
- a shaped part having integrated fluid channels within the shaped part extending between a first end of the shaped part and a second end of the shaped part, wherein the shaped part is configured to be non-rotating;
- and
- a gap extending between the rotor and the stator,
- wherein permanent magnets are connected to the rotor shaft and adjoin the gap,
- wherein the rotor shaft has, spaced apart radially from the gap, cooling channels extending in a longitudinal direction of the rotor shaft between the first end face and the second end face of the rotor shaft,
- wherein the shaped part is positioned upstream and adjacent to the first end face of the rotor shaft along the longitudinal direction such that an entirety of each integrated fluid channel of the integrated fluid channels within the shaped part is positioned upstream of the first end face and the cooling channels of the rotor shaft, and
- wherein the shaped part is configured to provide fluid flow to the cooling channels of the rotor shaft at the first end face via the integrated fluid channels of the shaped part.
An electrical machine comprising:
- a stator;
- a rotor spaced apart radially from the stator, wherein the rotor is configured to rotate about a longitudinal axis, and wherein the rotor comprises a rotor shaft having a first end face, a second end face, and a surface;
- a shaped part having integrated fluid channels within the shaped part, wherein the shaped part is configured to be non-rotating;
- a gap extending between the rotor and the stator;
- and
- an auxiliary plate arranged on the first end face of the rotor shaft,
- wherein permanent magnets are connected to the rotor shaft and adjoin the gap,
- wherein the rotor shaft has, spaced apart radially from the gap, cooling channels extending in a longitudinal direction of the rotor shaft between the first end face and the second end face of the rotor shaft,
- wherein the shaped part is positioned adjacent to the first end face of the rotor shaft along the longitudinal direction,
- wherein the shaped part is configured to provide fluid flow to the cooling channels of the rotor shaft at the first end face,
- wherein the auxiliary plate is positioned between the shaped part and the first end face of the rotor shaft along the longitudinal direction, and
- wherein the auxiliary plate has fluid channels configured receive the fluid flow from the integrated fluid channels of the shaped part and distribute the fluid flow to the cooling channels of the rotor shaft along the longitudinal direction.
Dependencies are inferred from the claim text.