SEAL STRUCTURE OF FIXED-SIDE OF ROTARY JOINT

PROBLEM TO BE SOLVED: To provide a seal structure of the fixed-side of a rotary joint capable of preventing contamination caused by oil leakage. SOLUTION: The rotary joint 1 includes a cylindrical upper fixed body 11, a cylindrical lower fixed body 12, and a shaft-like rotor 13 rotatably supported b...

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Bibliographic Details
Main Authors NARUTOMI MASAKI, FURUKAWA YUKICHI, OKAMOTO KAZUNARI
Format Patent
LanguageEnglish
Published 23.10.2008
Subjects
BLASTING
CYLINDERS
ENGINEERING ELEMENTS AND UNITS
GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS
HEATING
JOINTS OR FITTINGS FOR PIPES
LIGHTING
MEANS FOR THERMAL INSULATION IN GENERAL
MECHANICAL ENGINEERING
PIPES
PISTONS
SEALINGS
SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING
THERMAL INSULATION IN GENERAL
WEAPONS
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Summary:PROBLEM TO BE SOLVED: To provide a seal structure of the fixed-side of a rotary joint capable of preventing contamination caused by oil leakage. SOLUTION: The rotary joint 1 includes a cylindrical upper fixed body 11, a cylindrical lower fixed body 12, and a shaft-like rotor 13 rotatably supported by the upper fixed body 11 and lower fixed body 12. The upper fixed body 11 is provided with a nozzle 15 communicating with a fluid flow port 132 on the side of rotation formed on the external peripheral surface of the rotor 13, and a seal portion with the periphery of a fluid flow port on the side of fixation made to serve as a thin-walled partitioning wall is provided at the end of the nozzle 15. Therefor, a clearance between and among the upper fixed body 11, the lower fixed body 12, and the rotor 13 is sealed without using oil. Even if a foreign matter enters the clearance, the foreign matter is prevented from being entering the fluid. COPYRIGHT: (C)2009,JPO&INPIT
Bibliography:Application Number: JP20070097373