Seal for rollers
AssigneeFAG Kugelfischer Georg Schafer (KGaA)
InventorsLeo Eisenmann, Georg Rudloff
Life of this patent
Estimating the term…
Abstract
A seal arrangement for rollers which permits axial displacement of a roller and its shaft with respect to their supporting bearing. A sealing ring which is generally L-shaped in cross-section has one radial arm of the L mounted on the shaft and against the roller, to provide a seal with respect to the roller. The other arm of the L extends axially away from the roller and has an outer circumferential surface which lies closely adjacent an inner surface of the bearing housing to provide a seal with respect to the housing. Lamellar rings may be provided between the bearing housing and the sealing ring.
Claims9
A sealed bearing arrangement for use with a roller such as a driven roller in a continuous casting plant or the like wherein a shaft rotates with the roller and lengthens a predetermined amount in use under the influence of heat, said bearing arrangement comprising:
- a bearing for supporting the shaft, said bearing having a housing, said roller and shaft being axially movable with respect to said housing, and
- a sealing ring adjacent to the roller which rotates with the roller, the sealing ring having an L-shaped cross-section, said L-shape being formed by
- (i) a first portion which is mounted closely adjacent the roller so as to prevent entry of unwanted material between the sealing ring and the roller, and extends radially outward, away from the axis of the shaft, and
- (ii) means defining a second portion which extends axially and parallel to the axis of the shaft, from a radially outward part of the first portion to a location closely adjacent the bearing housing, so as to prevent entry of unwanted material between the sealing ring and the bearing housing, while permitting axial movement of said sealing ring with respect to said housing, as said shaft lengthens said predetermined amount and thereby moves axially with respect to said housing under the influence of heat.
A sealed roller arrangement comprising:
- (a) a roller,
- (b) a shaft with which the roller rotates,
- (c) a bearing for supporting the shaft, said bearing having a housing, and
- (d) a sealing ring having
- (i) a first portion which is mounted closely adjacent the roller so as to prevent entry of unwanted material between the sealing ring and the roller, and
- (ii) a second portion which extends from the first portion, to a location closely adjacent the bearing housing, so as to prevent entry of unwanted material between the sealing ring and the bearing housing;
- the bearing housing and the second portion of the sealing ring having respective sealing surfaces which are disposed closely adjacent one another;
- the sealing surface of the bearing housing being radially outward of the sealing surface of the sealing ring and said surfaces are generally coaxial, so as to permit relative axial displacement of said two surfaces while preventing entry of such unwanted material, and
- further comprising lamellar rings extending radially between the sealing surfaces of the bearing housing and the sealing ring for further preventing entry of unwanted material.
Dependencies are inferred from the claim text.