| 摘要 |
A rolling bearing device (32) includes a bearing housing (61) supported on a casing (40) of a turbocharger, and a pair of rolling bearings (10a,10b) mounted within the bearing housing and rotatably supporting a turbine shaft (41). A middle position between the pair of rolling bearings in an axial direction and a central portion of the bearing housing in the axial direction are offset from each other in the axial direction. Each of the rolling bearings includes an inner ring (1), an outer ring (3), an intermediate ring (2) interposed between the inner and outer rings, a row of rolling elements (4) rollably interposed between the inner ring and the intermediate ring, and a row of rolling elements (5) rollably interposed between the intermediate ring and the outer ring. The intermediate ring has a damper function to be very slightly displaced or very slightly deformed elastically so as to damp vibration produced during rotation of the turbine shaft. |
