Title:
SHAFT AND SEAL STRUCTURE
Document Type and Number:
WIPO Patent Application WO/2017/094779
Kind Code:
A1
Abstract:
Provided are a shaft and a seal structure with which it is possible to reduce sliding resistance of a seal ring regardless of friction over time on a side surface of the seal ring. This shaft 200 rotates relative to a housing 300, and the outer peripheral side of the shaft is provided with an annular groove 210 into which is fitted a resin seal ring 400 for sealing an annular gap between the housing 300 and the seal ring 400 and maintaining pressure of a fluid to be sealed; wherein a side wall surface 213 against which the seal ring 400 slides in the annular groove 210 is made of metal, and formed in the side wall surface 213 is a dynamic pressure generation groove 220 for generating dynamic pressure by means of the fluid to be sealed, which is guided in during relative rotation.
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Inventors:
SAKUMA KATSUYOSHI (JP)
Application Number:
PCT/JP2016/085560
Publication Date:
June 08, 2017
Filing Date:
November 30, 2016
Export Citation:
Assignee:
NOK CORP (JP)
International Classes:
F16J15/18; F16J15/48
Foreign References:
| JP2007182959A | 2007-07-19 | |||
| JP2015175474A | 2015-10-05 |
Other References:
See also references of EP 3385577A4
Attorney, Agent or Firm:
SERA, Kazunobu et al. (JP)
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