Rotor for an electric machine
First Claim
1. A rotor for an electric machine, the rotor comprising:
- a rotor shaft and a rotor body non-rotatably mounted to said rotor shaft, said rotor shaft being a hollow shaft at least in sections thereof;
a delivery screw non-rotatably mounted in said hollow shaft and configured to convey a cooling fluid through said hollow shaft in a first direction being an axial direction extending along an axis of said hollow shaft;
said rotor body being formed with at least one cooling channel for the cooling fluid, said at least one cooling channel extending in an axial direction and including an end-face inlet opening and an end-face outlet opening on mutually opposite sides, wherein the cooling fluid conveyed in the first direction through said hollow shaft is at least partially directed through said inlet opening into said cooling channel and then conveyed in a second direction, counter to the first direction, to said outlet opening; and
wherein said hollow shaft and said at least one cooling channel are fluidically connected, via said end-face inlet opening and said end-face outlet opening, to form an autonomously operating closed cooling circuit within the rotor.
1 Assignment
0 Petitions
Accused Products
Abstract
A rotor for an electric machine is formed of a rotor shaft and a rotor body which is non-rotatably mounted on the rotor shaft. At least sections of the rotor shaft are configured as a hollow shaft. A delivery screw is non-rotatably mounted in the hollow shaft for conveying a cooling fluid in a first direction through the hollow shaft. In order to provide an improved cooling of the rotor, the rotor body is formed with at least one cooling channel which extends in the axial direction. The cooling channel has an end-face inlet opening and an end-face outlet opening positioned on the opposite side for the cooling fluid. The cooling fluid conveyed in the first direction through the hollow shaft can be at least partially directed through the inlet opening into the cooling channel and conveyed in a second direction, which is counter to the first direction, to the outlet opening.
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Citations
11 Claims
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1. A rotor for an electric machine, the rotor comprising:
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a rotor shaft and a rotor body non-rotatably mounted to said rotor shaft, said rotor shaft being a hollow shaft at least in sections thereof; a delivery screw non-rotatably mounted in said hollow shaft and configured to convey a cooling fluid through said hollow shaft in a first direction being an axial direction extending along an axis of said hollow shaft; said rotor body being formed with at least one cooling channel for the cooling fluid, said at least one cooling channel extending in an axial direction and including an end-face inlet opening and an end-face outlet opening on mutually opposite sides, wherein the cooling fluid conveyed in the first direction through said hollow shaft is at least partially directed through said inlet opening into said cooling channel and then conveyed in a second direction, counter to the first direction, to said outlet opening; and wherein said hollow shaft and said at least one cooling channel are fluidically connected, via said end-face inlet opening and said end-face outlet opening, to form an autonomously operating closed cooling circuit within the rotor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification