Title:
SHAFT SEAL
Document Type and Number:
WIPO Patent Application WO/2023/106140
Kind Code:
A1
Abstract:
Provided is a shaft seal that exhibits excellent seal-ability and has low torque characteristics. A shaft seal 11 which is an annular shaft seal bonded to the outer circumferential surface of a rotary shaft to seal a sealed fluid. A gap between the rotary shaft and a housing having the shaft seal 11 fitted therein is divided into a high-pressure side and a low-pressure side by the shaft seal 11. The shaft seal 11 is provided with a seal lip 12 which extends toward the high pressure-side and slides with respect to the rotary shaft. The seal lip 12 has recessed grooves 15 in the vicinity of a part that makes contact with the inner circumferential surface 12a which slides with respect to the rotary shaft. The recessed grooves 15 are formed so as to extend in the axial direction of the the shaft seal 11. When the total length of the seal lip 12 is defined as 100%, the recessed grooves 15 are formed starting from a point located 5%-30% from a tip 12b of the seal lip 12 toward the other end.
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| JPH08166065 | SHAFT SEALING DEVICE |
Inventors:
YASUDA KEN (JP)
TAKAHASHI YOSHIHIRO (JP)
TAKAHASHI YOSHIHIRO (JP)
Application Number:
PCT/JP2022/043609
Publication Date:
June 15, 2023
Filing Date:
November 25, 2022
Export Citation:
Assignee:
NTN TOYO BEARING CO LTD (JP)
International Classes:
F16J15/3236; F04C27/00; F16J15/18
Domestic Patent References:
| WO2021117601A1 | 2021-06-17 |
Foreign References:
| JP2009216198A | 2009-09-24 | |||
| JPH02136858U | 1990-11-15 | |||
| JP2021156314A | 2021-10-07 | |||
| JP2015004414A | 2015-01-08 |
Attorney, Agent or Firm:
WAKI Hikaru et al. (JP)
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