F - Mech Eng,Light,Heat,Weapons – 16 – C
Patent
F - Mech Eng,Light,Heat,Weapons
16
C
80/43, 308/1.6
F16C 33/66 (2006.01) B21B 31/07 (2006.01) F16C 13/02 (2006.01) F16C 21/00 (2006.01) F16C 32/06 (2006.01)
Patent
CA 1092631
ABSTRACT OF THE DISCLOSURE An oil film bearing for a roll neck in a rolling mill, wherein a sleeve with a tapered bore is mounted on a tapered section of the roll neck for rotation therewith, the sleeve being journalled in a non-rotatable bushing contained in a bearing chock. During rolling, a film of high pressure oil is maintained hydrodynamically between the sleeve and bushing at the bearing load zone. In order to provide lubrication at the roll neck/ sleeve interface, a portion of the hydrodynamic oil is bled from the sleeve/bushing interface via holes extending radially through the sleeve into a plurality of longitudinal primary grooves in the sleeve bore. This conventional arrangement is improved by the addition of a plurality of secondary grooves in the sleeve bore. Oil is forced from the primary grooves into the secondary grooves via connecting grooves in the sleeve bore. The inter- connected primary, secondary and connecting grooves form a plurality of discrete circumferentially isolated groove networks which are sequentially charged with high pressure oil as each rotates through the bearing load zone. The connecting grooves create a pressure differential which opposes reverse flow of oil from the secondary grooves into the primary grooves as a result of centrifugal force acting on the groove networks rotating through the unloaded zone of the bearing.
312185
Fetherstonhaugh & Co.
Morgan Construction Company
LandOfFree
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