Title:
ROLLING BEARING FOR AIR TURBINE
Document Type and Number:
WIPO Patent Application WO/2021/132688
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. (1)≤Ts/Sct≤(10) is satisfied where Ts represents a circumferential gap of the retaining ring (40) when the seal member (30) and the retaining ring (40) are mounted to the groove part (13) of the outer ring (10), and Sct represents the axial thickness of a portion in contact with the retaining ring (40) of the seal member (30). Accordingly, when the compressed air is supplied, the seal member is suppressed from floating due to the circumferential gap formed between both circumferential end parts of the retaining ring, and the seal member is suppressed from coming out from the groove part of the outer ring.
Inventors:
OYAMA TAKUYA (JP)
SUZUKI HIRONORI (JP)
SUZUKI HIRONORI (JP)
Application Number:
PCT/JP2020/049026
Publication Date:
July 01, 2021
Filing Date:
December 25, 2020
Export Citation:
Assignee:
NSK LTD (JP)
International Classes:
F16C19/06; F16C19/16; F16C33/78; F16J15/18; F16J15/3268
Foreign References:
| JP2017211076A | 2017-11-30 | |||
| JP2018013230A | 2018-01-25 | |||
| JP2017211076A | 2017-11-30 | |||
| JP2019238708A | 2019-12-27 | |||
| JP2019238709A | 2019-12-27 |
Other References:
See also references of EP 4083454A4
Attorney, Agent or Firm:
EIKOH PATENT FIRM, P.C. (JP)
Download PDF:
Previous Patent: ROLLING BEARING FOR AIR TURBINE
Next Patent: BRAZING MATERIAL APPLYING METHOD AND METHOD FOR MANUFACTURING BRAZING METAL MEMBER
Next Patent: BRAZING MATERIAL APPLYING METHOD AND METHOD FOR MANUFACTURING BRAZING METAL MEMBER