Reliability roller bearing

• US 4,384,749 A
• Filed: 06/26/1981
• Issued: 05/24/1983
• Est. Priority Date: 06/26/1981
• Status: Expired due to Fees

• Current Assignee: The United States of America As Represented By The Secretary of Agriculture
• Original Assignee: United States Of America As Represented By The Secretary Of The Air Force
• Inventors: Schaefer, James R.
• Primary Examiner(s): Levy, Stuart S.
• Assistant Examiner(s): Werner, David
• Application Number:
  US06/277,489
• Time in Patent Office: 697 Days
• Field of Search: 308/216, 308/207 R, 308/202, 308/240, 308/244, 308/187
• US Class Current: 384/465
• CPC Class Codes: F16C 19/26 with a single row of rollers
• CPC Class Codes: F16C 2360/23 Gas turbine engines in general F02C
• CPC Class Codes: F16C 33/605 with a separate retaining member, e.g. flange, shoulder, guide ring, secured to a race ring, adjacent to the race surface, so as to abut the end of the rolling elements, e.g. rollers, or the cage
• 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 35/073 between shaft and inner race ring

Abstract

An improved reliability roller bearing having an outer ring; inner ring made up of three separable elements, that is, two guide rails and an inner raceway; a plurality of rollers interposed between the inner ring and the outer ring and a cage for supporting the rollers therebetween. Both guide rails entrap up to 60% of the roller diameter. In addition, the roller bearing incorporates therein a novel lubricant distribution system which is formed within the guide rails. Even distribution of lubricant is obtained by a centrifugally fed weir built into both guide rails.

Claims

1. A roller bearing comprising an outer ring, an inner ring, a plurality of rollers interposed between said inner ring and said outer ring and means interposed between said inner ring and said outer ring for supporting said rollers therebetween;

said inner ring being made of three separable elements in the form of a pair of guide rails and an inner raceway interposed therebetween, each of said guide rails having means formed therein for distributing lubricant to said rollers;

said lubricant distributing means in each of said guide rails being made up of an annular channel formed within an inner face of each of said guide rails and a weir connected to each of said channels, said weir in each of said guide rails being located adjacent said rollers, each of said guide rails having a portion of said inner face situated adjacent said rollers and tapering down to said weir, and a plurality of radially extending slots formed within said guide rails interconnecting said channels to a lubricant source whereby even distribution of said lubricant from said channels is maintained by centrifugal force on said lubricant during bearing operation.

2. A roller bearing as defined in claim 1 wherein said roller supporting means, said guide rails and said inner raceway are made of materials having different hardness.

3. A roller bearing as defined in claim 1 wherein each of said guide rails has a side thereof situated adjacent said rollers, said sides adjacent said rollers being of a predetermined height and said predetermined height being approximately equal to 60% of the diameter of said rollers.

4. A roller bearing as defined in claim 1 wherein said weir has a lip formed thereon.

5. A roller bearing as defined in claim 1 wherein said inner ring has a bore of preselected size so as to matingly engage the outer surface of a shaft, and said lubricant distribution system further comprising a plurality of radial extending holes located within said shaft adjacent said radial extending slots in said guide rails and means situated within said shaft for feeding said lubricant into said radial extending holes.

6. A roller bearing as defined in claim 5 wherein said weir has a lip formed thereon.

7. A roller bearing as defined in claim 6 wherein said lip of said weir is formed concentric with said bore of said inner ring.

8. A roller bearing comprising an outer ring, an inner ring, a plurality of rollers interposed between said inner ring and said outer ring and means interposed between said inner ring and said outer ring for supporting said rollers therebetween;

said inner ring being made of three seperable elements in the form of a pair of guide rails and an inner raceway interposed therebetween, each of said guide rails having means formed therein for distributing lubricant to said rollers;

said lubricant distributing means being made up of

(a) an annular channel formed within an inner face of each of said guide rails, said channel terminating in a weir adjacent said rollers, each of the guide rails having a portion of said inner face situated adjacent said rollers and tapering down to said weir, and a plurality of radially extending slots formed within said guide rails interconnecting said channels to a lubricant source,

(b) annular means interposed between said inner ring of said bearing and a shaft upon which said bearing is mounted for spacing said inner ring from said shaft, said spacing means having means therein for feeding lubricant to said radial slots in said guide rails,

(c) annular means juxtaposed said spacing means for fixedly securing said bearing to said shaft, and said bearing securing means having means therein for storing said lubricant received from said lubricant source and feeding said lubricant to said lubricant feeding means in said spacing means;

whereby even distribution of said lubricant from said channel is maintained by centrifugal force on said lubricant during bearing operation.

9. A roller bearing as defined in claim 8 wherein said lubricant storing means comprises at least one reservoir, said reservoir having an inlet and an outlet, said inlet being formed between said bearing securing means and said shaft and having a preselected outer diameter, said outlet being formed between said bearing securing means and said shaft and having a preselected outer diameter, said preselected outer diameter of said inlet being less than said preselected outer diameter of said outlet.

10. A roller bearing as defined in claim 8 wherein said lubricant feeding means in said spacing means comprises at least one axially extending slot adjacent said shaft and having a preselected outer diameter, said preselected outer diameter of said slot in said spacing means being larger than said preselected diameter of said outlet of said reservoir, and a plurality of radially extending holes formed in said spacing means interconnected to said axially extending slot, said radial holes being aligned axially with said radially extending slots in said guide rails in order to feed lubricant thereto.

11. A roller bearing as defined in claim 8 wherein said lubricant storing means comprises a first reservoir and a second reservoir, said reservoirs being interconnected by a slot formed between said bearing securing means and said shaft, said slot having a preselected outer diameter, said first reservoir having an inlet, said inlet being formed between said bearing securing means and said shaft and having a preselected outer diameter, said preselected outer diameter of said inlet being less than said preselected outer diameter of said slot, said second reservoir having an outlet in the shape of a weir formed between said bearing securing means and said shaft, said outlet having a preselected outer diameter, said preselected outer diameter of said second reservoir being greater than said preselected outer diameter of said slot.

12. A roller bearing as defined in claim 11 wherein said lubricant feeding means in said spacing means comprises at least one axially extending slot adjacent said shaft and having a preselected outer diameter, said preselected outer diameter of said slot in said spacing means being larger than said preselected diameter of said outlet of said reservoir, and a plurality of radially extending holes formed in said spacing means interconnected to said axially extending slot, said radial holes being aligned with said radially extending slots in said guide rails in order to feed lubricant thereto.