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Title:
ROTARY JOINT
Document Type and Number:
Japanese Patent JP2020106052
Kind Code:
A
Abstract:
To provide a rotary joint which can be suppressed in the elongation of a total length in an axial direction even if the number of ports is increased.SOLUTION: Each mechanical device 7 of a rotary joint 1 has a first shaft-side sealing the 71 and a second shaft-side sealing ring 72 which are attached to a shaft body 5, and a first case-side sealing ring 73 and a second case-side sealing ring 74 which are attached to a case 2. A first communication flow passage 41 for partitioning an annular space A, and connecting a first outside flow passage 31 and a first inside flow passage 61 is formed between the first side-side sealing ring 71 and a first slide portion 77 of the first case-side sealing ring 73, and the second shaft-side sealing ring 72 and a second slide portion 78 of the second case-side sealing ring 74. A second communication flow passage 42 for partitioning the annular space A, and connecting a second outside flow passage 32 and a second inside flow passage 62 is formed between the first slide portion 77 at one side in an axial direction, and the second slide portion 78 at the other side in the axial direction out of the mechanical seal devices 7 which adjoin each other in the axial direction.SELECTED DRAWING: Figure 2

Inventors:
SUZUKI OSAMU
OKUNISHI YASUYUKI
MATSUI SHUHEI
ISHIJIMA MASANAO
Application Number:
JP2018243016A
Publication Date:
July 09, 2020
Filing Date:
December 26, 2018
Export Citation:
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Assignee:
NIPPON PILLAR PACKING
International Classes:
F16L27/08; F16L39/04; F16L39/06
Attorney, Agent or Firm:
Sancrest International Patent Office



 
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