JPH03105770U

JPH03105770U -

Info

Publication number: JPH03105770U
Application number: JP1375890U
Authority: JP
Priority date: 1990-02-16
Filing date: 1990-02-16
Publication date: 1991-11-01
Anticipated expiration: 2004-08-10
Also published as: JPH0629560Y2

Description

[Brief explanation of the drawing]

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図は従来例を示す断面図、第
３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……Ｏリング（ガスケツト部）
、５８……スラストリング、６０……スタツドボ
ルト、６２……ナツト、６４……六角穴付きボル
ト（押付ボルト）、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 sectional view showing a conventional example, and Fig. 3 is a sectional view showing the operating state of the shutdown seal in the conventional example. be. 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...O-ring (gasket part)
, 58...Thrust ring, 60...Stud bolt, 62...Nut, 64...Hexagon socket head bolt (pressing bolt), A...Inside the can, B...Atmosphere.

Claims

[Scope of utility model registration request]

A shaft seal housing arranged 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 are connected to a rotating ring airtightly attached to the shaft on the inner circumference of the shaft seal housing. It includes a mechanical seal that is in close contact with the can, and a shutdown seal that is placed inside the can of the mechanical seal. A retainer that is fitted so as to be movable in the axial direction and has a gasket portion on the end face opposite to the inner diameter flange, and a surface that passes through the inner diameter flange and the shaft seal housing in the axial direction and is airtightly partitioned from the inside of the can in the retainer at one end. A stud bolt is fixed to the shaft seal housing and has a nut screwed onto the other end that protrudes from the shaft seal housing, and a stud bolt that passes through the inner diameter flange and the shaft seal housing in the axial direction, is threaded with the inner diameter flange, and has one end in contact with the retainer. A can pressure sealing mechanism comprising a pressing bolt in contact with the retainer and a thrust ring airtightly fixed to the shaft in close opposition to the end surface of the retainer on the side opposite to the inner diameter flange.