초록 ▼

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

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).

대표청구항 ▼

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 shaf

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, 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.