Insulated bearing ring
AssigneeGeneral Electric Company
InventorsHarikiran Murikipudi, Vijayakumar Tumma
Life of this patent
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Abstract
An insulated bearing, a dynamoelectric machine including the insulated bearing, and a method of forming the insulated bearing are disclosed. In an embodiment, the bearing includes an outer ring, an inner ring disposed within the outer ring and concentric therewith. An insulating ring is disposed between the inner ring and the outer ring, and includes an outer circumferential serration extending radially outward from an outer surface of the insulating ring, and an inner circumferential serration extending radially inward from an inner surface of the insulating ring. These serrations mate with features of respective surfaces of the outer and inner rings.
Claims20
A bearing ring comprising:
- an outer ring having an inner circumferential channel disposed on a radially inward surface thereof;
- an inner ring disposed within the outer ring and concentric therewith, the inner ring having an outer circumferential channel disposed on a radially outward surface thereof;
- and
- an insulating ring disposed between the inner ring and the outer ring, wherein the insulating ring includes:
- an outer circumferential serration extending radially outward from an outer surface of the insulating ring, and
- an inner circumferential serration extending radially inward from an inner surface of the insulating ring,
- wherein the outer circumferential channel and the inner circumferential serration are mating features, and
- wherein the inner circumferential channel and the outer circumferential serration are mating features.
A dynamoelectric machine comprising:
- a rotor;
- and
- a stator at least partially surrounding the rotor,
- wherein the rotor includes:
- a first end shield disposed on a first axial end of the rotor, and a second end shield disposed on a second axial end of the rotor;
- a bearing disposed axially outboard of each of the first end shield and the second end shield, wherein the bearing includes:
- an outer ring having an inner circumferential channel disposed on a radially inward surface thereof;
- an inner ring disposed within the outer ring and concentric therewith, the inner ring having an outer circumferential channel disposed on a radially outward surface thereof;
- and
- an insulating ring disposed between the inner ring and the outer ring,
- wherein at least one of the first end shield and the second end shield are electrically insulated from the bearing disposed axially outward thereof.
A method for forming an insulated bearing, the method comprising:
- providing an outer ring having a first diameter and an inner circumferential channel disposed on a radially inward surface thereof;
- providing an inner ring having a second diameter and an outer circumferential channel disposed on a radially outward surface thereof,
- wherein the second diameter is smaller than the first diameter;
- inserting the inner ring into the outer ring such that the inner ring and the outer ring are substantially concentric;
- and
- injecting an insulating material into an annular space between the inner ring and the outer ring.
Dependencies are inferred from the claim text.