Patent ID: 6872003
Filing Date: 2005-03-29
Classification: F01D,F05D,F16C

Abstract:
1. A rolling bearing for a turbomachine to support a first shaft rotatably relative to a second shaft, and comprising: a plurality of rolling elements engaged between an inner annular ring mounted on the second shaft and an outer annular ring mounted on the first shaft, an inside face of said outer ring and an outside face of said inner ring defining between them an annular space; an oil film formed on an annular contact surface between said outer ring and said first shaft and defined laterally by at least two annular sealing rings; at least one duct passing through said inner ring, said duct communicating with an oil feed circuit and opening out into an inner race for said rolling elements in order to lubricate them; and at least one additional duct passing through said inner ring, said additional duct communicating with said oil feed circuit and opening out to the outside of the inner race in order to feed oil through said outer ring to said oil film under the effect of the centrifugal force generated by the rotation of said second shaft; wherein said outer ring includes an annular shoulder projecting radially towards the inside of said annular space, said shoulder including at least one channel opening out substantially in register with said additional duct and opening out into said oil film.