JPH03118363U

JPH03118363U -

Info

Publication number: JPH03118363U
Application number: JP2713090U
Authority: JP
Priority date: 1990-03-19
Filing date: 1990-03-19
Publication date: 1991-12-06
Anticipated expiration: 2004-07-27
Also published as: JPH0627883Y2

Description

[Brief explanation of drawings]

第１図は本考案缶圧シール機構の一実施例を示
す半裁断面図、第２図は同じくシヤツトダウンシ
ールの作動状態を示す半裁断面図、第３図は同じ
く作用説明図、第４図は従来例を示す断面図、第
５図は同従来例におけるシヤツトダウンシールの
作動状態を示す断面図である。２……缶体、４……内径フランジ、６……軸封
部ハウジング、８……シヤフト、１０……メカニ
カルシール、１８，２０……回転環、３０，３２
……固定環、４４……シヤツトダウンシール、４
６……筒状部、４８……リテーナ、５０，５２…
…Ｏリング、５４……コイルスプリング、５６…
…Ｏリング（ガスケツト部）、６０……スラスト
リング、６４……スタツドボルト、６６……ナツ
ト、Ａ……缶内、Ｂ……大気。 Fig. 1 is a half-cut sectional view showing an embodiment of the can pressure seal mechanism of the present invention, Fig. 2 is a half-cut sectional view showing the operating state of the shutdown seal, Fig. 3 is an explanatory diagram of the operation, and Fig. 4 is a half-cut sectional view showing an embodiment of the can pressure seal mechanism of the present invention. FIG. 5 is a sectional view showing the operating state of the shutdown seal in the conventional example. 2... Can body, 4... Inner diameter flange, 6... Shaft seal housing, 8... Shaft, 10... Mechanical seal, 18, 20... Rotating ring, 30, 32
... Fixed ring, 44 ... Shutdown seal, 4
6... Cylindrical part, 48... Retainer, 50, 52...
...O-ring, 54...Coil spring, 56...
...O ring (gasket part), 60... Thrust ring, 64... Stud bolt, 66... Nut, A... Inside the can, B... Atmosphere.

Claims

[Scope of Claim for Utility Model Registration] 1. A shaft seal housing disposed on the end face facing the atmosphere side of the inner diameter flange on the can body side, and a fixed ring airtightly attached to the housing attached to the shaft on the inner periphery of the shaft seal housing. It includes a mechanical seal that is in close contact with a rotating ring that is airtightly mounted, and a shutdown seal that is arranged inside the can of this mechanical seal, and this shutdown seal has a projection on the end face of the inner diameter flange that faces the inside of the can. A retainer is fitted airtightly and movably in the axial direction into the cylindrical part provided, and has a gasket part on the end face opposite to the inner diameter flange, and a retainer that passes through the inner diameter flange and the shaft seal housing in the axial direction, and one end is the retainer. a stud bolt fixed to a surface airtightly partitioned from inside the can and having a nut screwed to the other end protruding from the shaft seal housing; a spring interposed in a compressed state between the inner diameter flange and the retainer;
A can pressure sealing mechanism comprising a thrust ring airtightly fixed to a shaft in close opposition to the end surface of the retainer on the side opposite to the inner diameter flange. 2. The can pressure sealing mechanism according to claim 1, wherein the gasket portion provided on the end surface of the retainer on the side opposite to the inner diameter flange is located on the outer diameter side of the outer peripheral surface of the cylindrical portion.