Title:
ROLLING BEARING FOR AIR TURBINE
Document Type and Number:
WIPO Patent Application WO/2021/132687
Kind Code:
A1
Abstract:
A rolling bearing (1) is provided with: an outer ring (10); an inner ring (20); a plurality of rolling bodies (3); and a seal member (30) that is provided to an axial one end part of a bearing internal space (S) between the outer ring (10) and the inner ring (20) and that is formed from an elastic body without a core metal. In the seal member (30), the outer circumferential part is fixed by a retaining ring (40) to a groove part (13) that is formed on the inner circumferential surface of the outer ring (10) in the axial one end part, and the inner circumferential part is configured to be elastically variable. The axial one end part having the seal member (30) provided therein is located on the opposite side to an inlet of compressed air to be supplied to the bearing internal space (S). The seal member (30) is provided with an inclination part (33) that is inclined, on the inner diameter side, toward the axial one end part side. The seal member (30) satisfies 0.25≤Skn/Skt≤2.5 where Skn represents a radial length from an inclination start portion (P) on the axial inside of the inclination part (33) to the outermost diameter position of a contact portion of the inner ring (20) with an outer circumferential surface (21) and Skt represents the thickness of the inclination part (33) in the inclination direction. Accordingly, when compressed air has been supplied, the seal member can be in non-contact with the outer circumferential surface of the inner ring with even a small amount of compressed air.
Inventors:
OYAMA TAKUYA (JP)
SUZUKI HIRONORI (JP)
SUZUKI HIRONORI (JP)
Application Number:
PCT/JP2020/049025
Publication Date:
July 01, 2021
Filing Date:
December 25, 2020
Export Citation:
Assignee:
NSK LTD (JP)
International Classes:
F16C19/06; F16C19/16; F16C33/78; F16J15/3204; F16J15/3268
Foreign References:
| JP2017211076A | 2017-11-30 | |||
| JP2016072040A | 2016-05-09 | |||
| JP2017211076A | 2017-11-30 | |||
| JP2019238706A | 2019-12-27 | |||
| JP2019238707A | 2019-12-27 |
Other References:
See also references of EP 4083453A4
Attorney, Agent or Firm:
EIKOH PATENT FIRM, P.C. (JP)
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