END SURFACE-CONTACT MECHANICAL SEAL - NIPPON PILLAR PACKING

Title:

END SURFACE-CONTACT MECHANICAL SEAL

Document Type and Number:

WIPO Patent Application WO/2016/143479

Kind Code:

A1

Abstract:

Provided is an end surface-contact mechanical seal that is configured so as seal by means of the relative rotational sliding contact action of sealing end surfaces (5a, 6a) which are opposing end surfaces of a fixed sealing ring (6), which is fixed to a rotating shaft (4), and a movable sealing ring (5), which is held by a seal case (3) so as to be movable in an axial direction, said mechanical seal being provided with a flushing means (8) that discharges a flushing liquid (F) from a flushing passage (81) formed in the seal case (3) toward relative rotational sliding contact portions (5a, 6a) of the sealing rings (5, 6), wherein coating layers (9a, 10a) and (9b, 10b), which comprise a material having a higher thermal conductivity coefficient and hardness than a constituent material of the sealing rings (5, 6), are formed in a series on the surfaces of the sealing rings (5, 6) on portions with which the flushing liquid (F) makes contact and on the sealing end surfaces (5a, 5b), and the relative rotational sliding contact portions (5a, 6a) of the sealing rings (5, 6) are configured to be uniformly and sufficiently cooled by the flushing liquid (F) over the entire perimeter of said portions.

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Inventors:

SAKAKURA HIROYUKI (JP)
TANIGUCHI MEGUMI (JP)

Application Number:

PCT/JP2016/054780

Publication Date:

September 15, 2016

Filing Date:

February 19, 2016

Export Citation:

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Assignee:

NIPPON PILLAR PACKING (JP)

International Classes:

F04B39/00; F16J15/34; F04D29/12

Foreign References:

JP2013130212A	2013-07-04
JPH07269342A	1995-10-17
JPS63132171U	1988-08-30
JP2014529052A	2014-10-30

Other References: