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Title:
MECHANICAL SEAL FOR SLURRY FLUID AND ROTARY JOINT FOR SLURRY FLUID USING THE SAME
Document Type and Number:
Japanese Patent JP2016044761
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To realize a superior mechanical seal sealing function capable of positively preventing immersion of slurry fluid into an O-ring filling space and securing the tracking of a movable seal ring.SOLUTION: A fixed tight-seal ring 6 is fixed to a rotary shaft 3 and a base end part 7b of a movable tight-seal ring 7 is fitted and held in an axial movable manner through an O-ring 16 to a tight-seal ring holding part 2b of a case body 2. An extremity end portion 7c of the movable tight-seal ring 7 is provided with an annular seal member 19 arranged in a slurry fluid region A, and an end surface of the slurry fluid region at the tight-seal ring holding part 2b is constituted at a seal surface 2d acting as a circular ring-shaped plane crossing at a right angle with an axis line. The annular seal member 19 forms a shape of rotary body made of resilient material comprising: a main body part 19a fitted and fixed to the extremity end part 7c of the movable tight-seal ring 7; a seal part 19b that can be resiliently deformed in a direction crossing at a right angle with the seal surface 2d and press contacted to it under a state in which it is surface contacted with the seal surface 2d; and a connecting part 19c for connecting both portions 19a, 19b.SELECTED DRAWING: Figure 1

Inventors:
SAKAKURA HIROYUKI
SHIMIZU TAKAYUKI
Application Number:
JP2014169959A
Publication Date:
April 04, 2016
Filing Date:
August 22, 2014
Export Citation:
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Assignee:
NIPPON PILLAR PACKING CO LTD
International Classes:
F16J15/34; F16J15/38
Domestic Patent References:
JP2009197945A2009-09-03
JP2010270834A2010-12-02
JPS49136959U1974-11-26
JPS6391762U1988-06-14
Foreign References:
WO1988004379A11988-06-16
Attorney, Agent or Firm:
三木 久巳