Rolling element bearing
AssigneeAktienbolaget SKF
InventorsJosef Brameshuber, Hubert Friedrich Koettritsch, Gerhard Strohmayr
Life of this patent
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Abstract
A rolling-element bearing includes an inner ring and an outer ring having at least two adjacently disposed raceways for at least two rows of rolling elements. In order to avoid or reduce corrosion on the raceways of the outer ring caused by condensation forming on the outer raceway, the outer ring has at least one radially-outwardly-extending groove in the axial region between its at least two raceways for collecting condensation at a location away from the raceways.
Claims9
A rolling-element bearing, comprising an inner ring and an outer ring, wherein the inner ring and the outer ring have at least two raceways disposed adjacent to one another for at least two rows of rolling elements,
- wherein the outer ring has the at least two raceways for the rolling elements, which raceways are a one-piece-formed part,
- wherein the at least two rows of rolling elements are axially aligned by a cage,
- wherein the outer ring has at least one radially-outwardly-extending groove in the axial region between its at least two raceways for the rolling elements, the radially-outwardly-extending groove configured to collect fluid from within the bearing,
- wherein the cage and the radially-outwardly-extending groove are in facing opposition and define opposite sides of a chamber in which only fluid may be located such that fluid can condensate for collection in the radially-outwardly-extending groove,
- wherein the rolling element bearing is formed as a double row spherical roller bearing or self-aligning ball bearing, so that the raceways of the outer ring lie on an arc that is concave in radial section,
- wherein the groove has a substantially rectangular shape or trapezoidal shape in radial section, wherein a single bore is machined into the outer ring, which bore connects the base of the groove to the outer circumference of the outer ring, and wherein the outer ring has a marking which marks the position of the bore on the circumference of the outer ring.
A rolling-element bearing comprising:
- an inner ring;
- a unitary outer ring having a first raceway and a second raceway disposed axially adjacent to the first raceway, the first and second raceways being configured to support two rows of rolling elements, the unitary outer ring being concave in radial section, and
- a cage axially aligning the two rows of rolling elements, and
- a circumferential groove between the first and second raceways, wherein the circumferential groove is configured to collect fluid from within the bearing,
- wherein the cage and the circumferential groove are in facing opposition and define opposite sides of a chamber in which only fluid may be located such that fluid can condensate for collection in the circumferential groove,
- wherein the rolling element bearing is formed as a double row spherical roller bearing or as a self-aligning ball bearing,
- wherein a single bore extends from an outer surface of the outer ring to the groove, and
- wherein the outer ring includes an indicia marking the position of the bore on the circumference of the outer ring.
Dependencies are inferred from the claim text.