Bearing assembly

• US 4,345,799 A
• Filed: 02/11/1981
• Issued: 08/24/1982
• Est. Priority Date: 04/08/1980
• Status: Expired due to Term

• Current Assignee: Rolls-Royce PLC (Rolls-Royce Holdings Plc)
• Original Assignee: Rolls-Royce PLC (Rolls-Royce Holdings Plc)
• Inventors: Crofts, Brian
• Primary Examiner(s): Footland, Lenard A.
• Application Number:
  US06/233,372
• Time in Patent Office: 559 Days
• Field of Search: 308/187, 308/201, 308/217, 308/215, 308/188, 308/189 R, 308/218
• US Class Current: 384/470
• CPC Class Codes: F16C 19/06 with a single row or balls
• CPC Class Codes: F16C 2360/23 Gas turbine engines
• CPC Class Codes: F16C 33/3843 formed as one-piece cages, i.e. monoblock cages
• CPC Class Codes: F16C 33/6651 in recesses or cavities provided in retainers, races or rolling elements
• CPC Class Codes: F16C 33/6677 from radial inside, e.g. via a passage through the shaft and/or inner ring
• CPC Class Codes: F16C 33/6681 Details of distribution or circulation inside the bearing, e.g. grooves on the cage or passages in the rolling elements

Abstract

A rolling element bearing comprises two bearing races between which is disposed a cage including rolling elements, the radially innermost cylindrical surface of the cage including oil reservoirs and the inner race including lips which during operation of the bearing contact the oil within the reservoirs whereby the speed of the cage is adapted to be controlled by the inner race.

Claims

1. A rolling element bearing comprising a radially inner bearing race, a radially outer bearing race and a plurality of rolling elements arranged within a bearing cage situated between the two races, the radially innermost cylindrical surface of the cage including at least one oil reservoir consisting of an annular recess, the radially outermost cylindrical surface of the innermost race including at least one radially extending lip arranged adjacent to at least one reservoir, and which lip during rotation of the bearing contacts the oil within the reservoir whereby the cage speed is adapted to be controlled by the inner race.

2. A rolling element bearing as claimed in claim 1 in which the bearing cage includes two oil reservoirs both of which are located within the innermost cylindrical surface of the cage on either side of the array of rolling element bearings.

3. A rolling element bearing as claimed in claim 1 in which the radially innermost bearing race includes two radially extending lips each of which is arranged adjacent to one of the oil reservoirs.

4. A rolling element bearing as claimed in claim 1 in which axially extending oil transfer grooves are provided within the radially innermost cylindrical surface of the cage such that oil may be supplied to one of the reservoirs and then transferred to the other reservoir through the transfer grooves.

5. A rolling element bearing as claimed in claim 1 in which oil is continuously supplied to at least one reservoir from which it is subsequently passed to lubricate the bearing.

6. A rolling element bearing as claimed in claim 1 for use in supporting a gas turbine engine main shaft.