MULTIPLE FLOW PATH ROTARY JOINT

WIPO Patent Application WO/2016/143480

A1

Provided is a multiple flow path rotary joint in which: four or more mechanical seals (3), which seal by means of the relative rotational sliding contact action of opposing end surfaces (31a, 32a) of a static sealing ring (32) provided to a case body (1) and a rotating sealing ring (31) provided to a rotating shaft body (2), are arranged between opposing peripheral surfaces of the case body (1) and rotating shaft body (2), which are connected so as to be rotatable relative to each other; channel connection spaces (4), which are sealed by adjacent mechanical seals (3, 3), are formed; fluid channels (7, 8), which communicate via the channel connection spaces (4), are formed in both bodies (1, 2); and the rotating sealing rings (31, 31) of adjacent mechanical seals (3, 3) are also used in one rotating sealing ring (31A). Therein, coating layers (10a, 10a), which comprise a material having a higher thermal conductivity coefficient and hardness than a constituent material of the rotating sealing ring (31A), are formed on both end surfaces (31a, 31a) of the rotating sealing ring (31A), said surfaces serving a dual purpose.

JP5933917	The rotary joint which has a seal controlled alternatively
JPH1073166	SELF-ADJUSTING SEAL DEVICE

SAKAKURA HIROYUKI (JP)
TANIGUCHI MEGUMI (JP)
OHGA MITSUHARU (JP)

PCT/JP2016/054784

September 15, 2016

February 19, 2016

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NIPPON PILLAR PACKING (JP)

F16J15/34; F16L27/08

WO2011036917A1

2011-03-31

JP2002174379A	2002-06-21
JP2009030665A	2009-02-12
JP2002005380A	2002-01-09

MIKI HISAMI (JP)
Hisami Miki (JP)

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