SEAL STRUCTURE

WIPO Patent Application WO/2018/207316

A1

Provided is a seal structure capable of improving the service life of a seal material. The seal material (10) is disposed in a seal groove (31) formed in a sliding clearance between a shaft (20) and a case (30). The seal material (10) includes an outer circumferential surface (40), a curved inner circumferential surface (41), an installation surface (42), and an upper surface (43). The installation surface (42) has a shape recessed toward the upper surface (43). The upper surface (43) has a shape recessed toward the installation surface (42). In a seal material (10) cross section on a virtual plane which is parallel with a direction perpendicular to a radial direction of the seal material (10) and passes through a center line of the seal material, when the longest length between the installation surface (42) and the upper surface (43) in the direction of extension of the center line of the seal material is H [mm], and the shortest length between the installation surface (42) and the upper surface (43) in the direction of extension of the center line of the seal material is h [mm], the relationship 0.755≦h/H≦0.769 is satisfied.

YAMAMOTO TAKAHIRO (JP)
JING CHAO (JP)
MINAMI MITSURU (JP)
UEDA AKIRA (JP)
NORIDUKI YUKI (JP)

PCT/JP2017/017887

November 15, 2018

May 11, 2017

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NIHON VALQUA KOGYO KK (JP)

F16J15/18; E21B10/22

JP2017036754A	2017-02-16
JP2009541666A	2009-11-26
JP2010084906A	2010-04-15
JP2005036827A	2005-02-10
JP2016075353A	2016-05-12

FUKAMI PATENT OFFICE, P.C. (JP)

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