Bearing system
First Claim
1. A bearing system for a rotating shaft, characterized in that said bearing system includes:
- a full-floating sleeve bearing (14) having a bearing surface adapted to rotatably carry the rotating shaft (20) at one end of the bearing system,an inner race (16a) adapted to be fastened to the rotating shaft at the other end of the bearing system, andan outer race (12) extending axially of the rotating shaft being adapted at said other end of the bearing system to cooperate with the inner race and a plurality of interposed rolling elements (16b) and to form an anti-friction bearing at said other end of the bearing system, the inner surface (12b) of the outer race (12) expanding from said one end to the other end and the outer surface (12a) of the outer race (12) forming an elongated cylindrical bearing surface and radially extending thrust-bearing surfaces (12c, 12d),said sleeve bearing (14) including a passageway (14b) permitting lubricating fluid to be introduced into the bearing system at the bearing surfaces of the sleeve bearing, said lubricating fluid introduced to the sleeve bearing and escaping therefrom being urged by rotation of the outer race to lubricate the rolling elements of the anti-friction rolling bearing.
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Accused Products
Abstract
A bearing system for a high-speed, rotating shaft (20) includes an outer race (12) adapted to be rotatable in its machine support and ( 32) to carry a rolling bearing (16), such as a ball bearing, at one end and further includes a floating sleeve bearing (14) at the other end. The outer race of the system can be adapted to rotate on a film of lubricant at a speed less than one-third, and preferably about one-tenth, that of the rotating shaft. The bearing system can include thrust-bearing surfaces (12c, 12d) at one end of the outer race and surfaces to permit lubrication of the sleeve and rolling bearings. The floating sleeve bearing is free to rotate at speeds of about one-half the speed of the rotating shaft. The system thus can provide very low bearing losses and a long bearing life. Such a system can be particularly adapted to provide an insertable bearing support for the rotating shaft of a turbocharger and to position the sleeve bearing adjacent the turbine (34) and the rolling bearing adjacent the compressor (36).
68 Citations
26 Claims
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1. A bearing system for a rotating shaft, characterized in that said bearing system includes:
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a full-floating sleeve bearing (14) having a bearing surface adapted to rotatably carry the rotating shaft (20) at one end of the bearing system, an inner race (16a) adapted to be fastened to the rotating shaft at the other end of the bearing system, and an outer race (12) extending axially of the rotating shaft being adapted at said other end of the bearing system to cooperate with the inner race and a plurality of interposed rolling elements (16b) and to form an anti-friction bearing at said other end of the bearing system, the inner surface (12b) of the outer race (12) expanding from said one end to the other end and the outer surface (12a) of the outer race (12) forming an elongated cylindrical bearing surface and radially extending thrust-bearing surfaces (12c, 12d), said sleeve bearing (14) including a passageway (14b) permitting lubricating fluid to be introduced into the bearing system at the bearing surfaces of the sleeve bearing, said lubricating fluid introduced to the sleeve bearing and escaping therefrom being urged by rotation of the outer race to lubricate the rolling elements of the anti-friction rolling bearing. - View Dependent Claims (2)
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3. A bearing system for carrying a shaft rotating at high speed within a stationary machine support, characterized in that said bearing system includes:
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a sleeve bearing (14) forming an inner bearing surface to carry the rotating shaft on a film of lubrication, an inner race (16a) adapted to cooperate with a plurality of ball bearings and to be fixed to the rotating shaft (20), a plurality of ball bearings (16b), and an outer race (12) adapted at one end to cooperate with the sleeve bearing (14) and adapted at the other end to cooperate with the ball bearings and inner race to form a ball bearing support for the shaft, the outer race (12) having an outer bearing surface (12a) and radially extending bearing surfaces (12c, 12d) adapted to be rotatably carried on a film of lubrication by the stationary machine support (32) and bear thrust imposed on said shaft, said bearing system being free to move radially in the machine support in response to imbalance and to rotate within the machine support at a fraction of the speed of shaft rotation. - View Dependent Claims (4, 5, 6, 7)
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8. An insertable bearing support system for a high-speed rotating shaft, characterized in that said bearing support system includes:
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a rotatable elongated outer race (12) forming an outer bearing surface including an elongated, axially extending cylindrical bearing surface portion (12a) and a pair of transversely extending, thrust-bearing surfaces (12c, 12d), a sleeve bearing (14) adjacent one end of the outer race (12) to rotatably support the rotating shaft (20) adjacent said one end of the outer race (12), and an inner race (16a) and a plurality of rolling elements (16b) at the other end cooperating with the inner surface (12b) of the outer race (12) to rotatably support the rotating shaft at the other end, said bearing system being thereby adapted to be inserted from one end of said rotating shaft and to provide bearing support at spaced locations on the rotating shaft and thrust bearings. - View Dependent Claims (9)
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10. A bearing system for a rotating shaft, characterized in that said bearing system includes:
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an independent outer race (12) adapted to be rotatable in its support (32) and carried on a film of lubricant and to provide a thrust bearing and a rolling bearing (16,
140) at one end of the outer race, said independent outer race having an elongated cylindrical bearing surface (12a) and radially extending bearing surfaces (12c, 12d), andan independent floating sleeve bearing adapted to cooperate with said rolling bearing and outer race adjacent the other end of the outer race. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A bearing system adapted to carry a shaft rotating at high speed within stationary machine support, characterized in that said bearing system includes:
an elongated outer race (118) carrying a rolling bearing (110,
120) adjacent each end and having radially extending portions forming thrust bearings, said elongated outer race being adapted to rotate within the stationary machine support (130) at a fraction of the speed of the shaft rotation and to move radially in the machine support in response to imbalance.- View Dependent Claims (19)
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20. A bearing system for carrying a rotating shaft within a machine support, characterized in that said bearing system includes:
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first bearing means for providing a bearing support for said rotating shaft at a first location on said shaft; second bearing means for providing a bearing support for said rotating shaft at a second location on said shaft spaced from said first location, said first bearing means comprising a first anti-friction roller bearing means including an inner race engaging said shaft, an outer race, and a plurality of roller bearings interposed between said inner race and said outer race, said outer race extending axially from said first location to adjacent said second location of said rotating shaft, said outer race having an outer bearing surface and radially extending thrust bearing surfaces adapted to be rotatably carried by said machine support, said bearing system being free to rotate within the machine support at a fraction of the speed of shaft rotation. - View Dependent Claims (21, 22, 23, 24, 25, 26)
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Specification