Hitachi, Ltd.

The Kansai Electric Power Co., Inc.

Koozi Aizawa

Katsutoshi Nii

Kazuhiko Kawaike

Hisao Inoue

Osamu Sugimoto

Ichiro Hitomi

Teiji Horita

An end face mechanical shaft seal for use in a hydraulic machine includes a seal ring assembly detachably secured to a seal casing and having a sealing face which makes a sliding and fluid-tight contact with an annular seat face presented by a flange on the rotor shaft. The seal ring assembly is of a cartridge type which includes a ring casing having an annular groove formed in one end surface thereof and a seal ring partly received in the groove and fixed to the ring casing by an adhesive. Each of the ring casing and the seal ring is constituted by a plurality of arcuate sections or segments which are connected together in the circumferential direction.

End face mechanical shaft seal for use in hydraulic machines and seal

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Hitachi, Japan

Koozi Aizawa