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US 10,122,228 B2Granted
Sleeve for an electrical machine
AssigneeROLLS-ROYCE plc
InventorsEllis F H Chong, Martyn A. Jones, Geraint W. Jewell
Life of this patent
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Abstract
A sleeve for retaining magnets around a rotor of an electrical machine. The sleeve is cylindrical and hollow, having axial length and having radial thickness between its inner surface and outer surface. The sleeve defines a plurality of axially spaced, circumferentially extending grooves. Each groove has radial depth which is less than the radial thickness of the sleeve.
Claims17
A sleeve for retaining magnets around a rotor of an electrical machine, the sleeve comprising:
- a body that is cylindrical and hollow, the body having an inner surface and an outer surface, the body having an axial length and a radial thickness between the inner surface and the outer surface;
- and
- a first plurality of axially spaced, circumferentially extending grooves formed in the inner surface of the body, each groove of the first plurality of grooves having a radial depth less than the radial thickness of the sleeve and extending circumferentially through less than 360°.
Dependencies are inferred from the claim text.