JPH0373765U

JPH0373765U -

Info

Publication number: JPH0373765U
Application number: JP13439989U
Authority: JP
Priority date: 1989-11-21
Filing date: 1989-11-21
Publication date: 1991-07-24

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例を示す断面図、第２
図は従来構造を示す半裁断面図、第３図は同じく
ベロー型パツキンが移動した状態の半裁断面図で
ある。１Ａ……密封空間側のメカニカルシール、１Ｂ
……反密封空間側のメカニカルシール、２……固
定環、４……回転環、５……ベロー型パツキン、
７……ドライブリング、７ａ……後端面、９Ａ，
９Ｂ……ハウジング端壁、１０……シヤフト、Ａ
……密封空間、Ｂ……反密封空間、Ｃ……シール
ボツクス。 Fig. 1 is a sectional view showing one embodiment of the present invention;
The figure is a half-cut sectional view showing a conventional structure, and FIG. 3 is a half-cut sectional view showing the bellows-type packing in a moved state. 1A... Mechanical seal on the sealed space side, 1B
...Mechanical seal on the anti-sealed space side, 2... Fixed ring, 4... Rotating ring, 5... Bellows type packing,
7... Drive ring, 7a... Rear end surface, 9A,
9B... Housing end wall, 10... Shaft, A
...Sealed space, B...Anti-sealed space, C...Seal box.

Claims

[Scope of utility model registration request]

There are two sets of mechanical seals arranged in parallel in the axial direction in the seal box of the housing formed between the sealed space and the non-sealed space, and the fixed rings of both mechanical seals are attached to the housing end walls at both ends of the seal box. The rotary rings of both mechanical seals are fitted airtightly into the shaft, while the rotary rings of both mechanical seals are in sliding contact with the axially opposing end surfaces of the fixed rings. In mechanical seals, the drive ring is made by tightening and fixing the bellows-type gaskets of both mechanical seals to the outer circumferential surface of the shaft.
A double mechanical seal characterized by its rear end faces abutting each other.