MECHANICAL SEAL DEVICE - EAGLE IND CO LTD

Title:

MECHANICAL SEAL DEVICE

Document Type and Number:

WIPO Patent Application WO/2007/055156

Kind Code:

A1

Abstract:

A mechanical seal device comprising a stationary side sliding ring (10), a rotating side sliding ring (20) capable of rotating and sliding in firm contact with the stationary side sliding ring (10), and an O-ring (30) interposed between the inner hole of the rotating side sliding ring (20) and a rotating shaft (200). The mechanical seal device further includes an annular ring member (60a) having a gas permeability lower than that of the O-ring (30). The ring member (60a) is installed in the inner hole of the rotating side sliding ring (20) so as to be adjacent to the O-ring (30) on the atmosphere side, and fulfills the requirement of the following conditional expression (1). In the conditional expression (1), (D1) is the diameter of the rotating shaft (200), (D2) is the inner diameter of the ring member (60a), and (D3) is the inner diameter of a portion of the inner hole of the rotating side sliding ring (20), which portion is located closer to the atmosphere side than the ring member (60a). D1 < D2 < D3 ... Expression (1)

Inventors:

NAKAHARA NOBUO (JP)

Application Number:

PCT/JP2006/322008

Publication Date:

May 18, 2007

Filing Date:

November 02, 2006

Export Citation:

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Assignee:

EAGLE IND CO LTD (JP)
NAKAHARA NOBUO (JP)

International Classes:

F16J15/34

Foreign References:

JP2000193099A	2000-07-14
JP2002156042A	2002-05-31
JPS6173964U	1986-05-19
JPS4813742A
JP2006177500A	2006-07-06
JP2001221344A	2001-08-17
JPS6173964U	1986-05-19
US3655205A	1972-04-11

Other References: