Title:
ROTARY JOINT FOR LOW-TEMPERATURE APPLICATION
Document Type and Number:
WIPO Patent Application WO/2010/140627
Kind Code:
A1
Abstract:
A small-sized lightweight rotary joint for low-temperature application.
A rotary joint for low-temperature application comprises: a housing (2); a non-rotation refrigerant pipe (3) provided within the housing (2) and having one end connected to the outside refrigerant source and the other end communicated with a portion to be cooled within a rotary machine; a rotatable rotation member (4) provided within the housing (2), having the refrigerant pipe (3) loosely inserted therethrough, and having one end affixed to the rotation section of the rotary machine; and a cylindrical relative rotation member (5) coaxial with both the refrigerant pipe (3) and the rotation member (4), having an affixed-side member (5a) affixed to the inner surface of the housing (2), and having a rotation-side member (5b) disposed so as to be rotatable inside the affixed-side member (5a). The affixed-side member (5a) is connected to the refrigerant pipe (3) through a refrigerant-pipe extension section (3a), and the rotation-side member (5b) is connected to the rotation member (4) through a rotation-member extension section (4a). The space (7) between the refrigerant pipe (3) and the rotation member (4) and the space (8) between the refrigerant-pipe extension section (3a) and the rotation-member extension section (4a) form a refrigerant region. A seal member (10) is provided between the affixed-side member (5a) and the rotation-side member (5b). A vacuum chamber and a pressure chamber are defined within the housing (2) by the peripheral wall of the refrigerant pipe (3), the refrigerant-pipe extension section (3a), and the affixed-side member (5a) of the relative rotation member (5).
Inventors:
IZUMI MITSURU (JP)
MIKI MOTOHIRO (JP)
KITANO MASAHIRO (JP)
MIKI MOTOHIRO (JP)
KITANO MASAHIRO (JP)
Application Number:
PCT/JP2010/059365
Publication Date:
December 09, 2010
Filing Date:
June 02, 2010
Export Citation:
Assignee:
UNIV TOKYO NAT UNIV CORP (JP)
KITANO SEIKI CO LTD (JP)
IZUMI MITSURU (JP)
MIKI MOTOHIRO (JP)
KITANO MASAHIRO (JP)
KITANO SEIKI CO LTD (JP)
IZUMI MITSURU (JP)
MIKI MOTOHIRO (JP)
KITANO MASAHIRO (JP)
International Classes:
F16L27/08; F16C19/08; F16J15/43
Domestic Patent References:
WO2006080280A1 | 2006-08-03 |
Foreign References:
JPH0851767A | 1996-02-20 | |||
JP2003065477A | 2003-03-05 | |||
JP2006095616A | 2006-04-13 |
Other References:
See also references of EP 2439438A4
Attorney, Agent or Firm:
KATSUNUMA, Hirohito et al. (JP)
Katsunuma Hirohito (JP)
Katsunuma Hirohito (JP)
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