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Document Type and Number:
Japanese Patent JP6906314
Kind Code:
PROBLEM TO BE SOLVED: To prevent leakage more positively at a centrifugal pump seal structure than that of the prior art in which there are provided a liner ring main body, a liner ring case and a liner ring cover to seal a clearance between an outer periphery of a suction port of an impeller and a partition wall and the liner ring main body can be moved in a radial direction and engaged with the impeller to prevent its rotation together with the impeller.SOLUTION: There are provided a liner ring main body 13 having a recess part 13a at its outer peripheral edge part; a liner ring case 14; and a liner ring cover 15 covering the liner ring main body from an upper part in an axial direction. The liner ring case comprises; a side wall part 14a for covering the liner ring main body from below in an axial direction; a cylindrical part 14b formed continuously from an outer peripheral part of the side wall part toward the other axial direction; and a flange part 14c extending out continuously in a radial direction from the other end in the axial direction of the cylindrical part. Either the liner ring case or the liner ring cover is formed with a protrusion part 17 inserted into said recess part.SELECTED DRAWING: Figure 3

Cao Ginharu
Hirotada Nagano
Takayuki Shirasawa
Kazuma Funahara
Nobuaki Utsumi
Application Number:
Publication Date:
July 21, 2021
Filing Date:
January 18, 2017
Export Citation:
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Sanphase Electric Co., Ltd.
International Classes:
F04D29/16; F04D29/08; F16J15/18
Domestic Patent References:
Attorney, Agent or Firm:
Ashikita Tomoharu

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