Magnetic bearing
AssigneeNorth American Philips Corporation
InventorMichael P. Goldowsky
Life of this patent
Estimating the term…
Abstract
A bearing has an inner ring of magnetic material having an annular recess in its outer periphery for receiving a first annular permanent magnet ring, and an outer ring having an annular recess in its inner surface for receiving a second permanent magnet ring. The magnet rings are spaced to provide a gap therebetween. The permanent magnet rings are poled in the radial direction, with like poles facing one another. The magnet rings may have inclined surfaces, with greater diameters at one end than at the other, for axial loading, or they may extend straight in the axial direction. The magnet rings may be built up of segment shaped pieces, which may be stacked also in the radial direction.
Claims15
A bearing structure comprising
- an inner cup-shaped ring of magnetic material, having an outer surface and outwardly extending flanges,
- a first permanent magnet ring comprising a plurality of angularly distributed, radially and axially extending segments disposed on said outer surface between said flanges, said ring supporting and restraining said segments and providing a flux return path for said first ring,
- an outer cup-shaped ring of magnetic material, having an inner surface and inwardly extending flanges, and
- a second permanent magnet ring comprising a plurality of angularly distributed, radially and axially extending segments disposed on said inner surface between said inwardly extending flanges, said outer ring supporting and restraining the segments of said second ring and providing a flux return path therefor,
- said first and second rings being spaced from each other to provide a gap therebetween, said magnets being poled perpendicular to the gap with like poles facing one another.
A bearing structure comprising:
- a cup-shaped inner ring having outwardly extending flanges and formed of magnetic material;
- a cup-shaped outer ring having inwardly extending flanges, and formed of magnetic material;
- a first permanent magnet ring disposed on the outer surface of said inner ring between the respective inner ring flanges;
- and
- a second permanent magnet ring disposed on the inner surface of said outer ring between the respective outer ring flanges and spaced from said first magnet ring to provide a gap therebetween, said magnets being poled perpendicularly to the gap with like poles facing one another,
- said inner and outer rings being arranged to provide structural restraint and flux return paths for the respective permanent magnet rings.
Dependencies are inferred from the claim text.