Title:
ROTARY JOINT
Document Type and Number:
WIPO Patent Application WO/2019/171697
Kind Code:
A1
Abstract:
Provided is a rotary joint in which a seal surface of a mechanical seal forming a fluid passage through which a gas flows can be lubricated using a liquid, even if there is only one fluid passage through which the liquid flows. A rotary joint 1 is provided with a plurality of mechanical seals 7 provided in an axial direction in an annular space A between a case body 2 and a shaft body 5, in order to form a first intermediate flow path 41 joining a first outside flow path 31 and a first inside flow path 61 of a first fluid passage 11 through which a liquid flows, and in order to form a second intermediate flow path 42 joining a second outside flow path 32 and a second inside flow path 62 of a second flow passage 12 through which a gas flows. The first outside flow path 31 and the first inside flow path 61 open at mutually different positions in the axial direction, sandwiching the second intermediate flow path 42, and an opening of the first outside flow path 31 and an opening of the first inside flow path 61 are joined by the first intermediate flow path 41. The first intermediate flow path 41 is formed in such a way that the liquid flowing through the first intermediate flow path 41 lubricates first and second seal surfaces 71a, 72a of the mechanical seals 7 forming the second intermediate flow path 42.
Inventors:
KIKUYAMA YOSHINORI (JP)
SUZUKI OSAMU (JP)
NISHI TAKASHI (JP)
SUZUKI OSAMU (JP)
NISHI TAKASHI (JP)
Application Number:
PCT/JP2018/045701
Publication Date:
September 12, 2019
Filing Date:
December 12, 2018
Export Citation:
Assignee:
NIPPON PILLAR PACKING (JP)
International Classes:
F16J15/34; F16L27/08
Domestic Patent References:
| WO2006061997A1 | 2006-06-15 | |||
| WO2016143480A1 | 2016-09-15 |
Foreign References:
| JP2004019912A | 2004-01-22 |
Attorney, Agent or Firm:
SUNCREST PATENT AND TRADEMARK ATTORNEYS (JP)
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