Patent ID: 11953057
Assignee: NSK LTD.
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F | IPC F

Claim 0:
1. A rolling bearing for an air turbine comprising:
an outer ring;
an inner ring;
a plurality of rolling bodies rollably disposed between the outer ring and the inner ring; and
a substantially annular seal member provided in one axial end portion of a bearing internal space between the outer ring and the inner ring and made of an elastic body without a core metal, wherein
an outer peripheral portion of the seal member is fixed by a retaining ring to a groove portion formed on an inner peripheral surface of the outer ring in the one axial end portion and an inner peripheral portion of the seal member is elastically deformable,
the one axial end portion is on a side opposite to an inlet of compressed air supplied to the bearing internal space,
the seal member includes an inclined portion inclined toward one axial end portion side on an inner diameter side, and
the seal member satisfies 0.25≤Skn/Skt≤2.5 when Skn is a radial length from an inclination start part of the inclined portion on an inside in an axial direction to an outermost diameter position of a part of contact of the seal member with an outer peripheral surface of the inner ring and Skt is a thickness of the inclined portion in a direction perpendicular to an inclination direction.