JPH0380153U

JPH0380153U -

Info

Publication number: JPH0380153U
Application number: JP14228489U
Authority: JP
Priority date: 1989-12-08
Filing date: 1989-12-08
Publication date: 1991-08-16

Description

[Brief explanation of drawings]

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
ベローズが移動した状態の半裁断面図である。１１Ａ……密封空間側のメカニカルシール、１
１Ｂ……反密封空間側のメカニカルシール、１２
……固定環、１３……カートリツジケース、１４
……コイルスプリング、１５……ベローズ、１８
……回転環、２０Ａ，２０Ｂ……ハウジング端壁
、２１……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 in a moved state. 11A... Mechanical seal on the sealed space side, 1
1B... Mechanical seal on the anti-sealed space side, 12
... Fixed ring, 13 ... Cartridge case, 14
...Coil spring, 15 ...Bellows, 18
... Rotating ring, 20A, 20B ... Housing end wall, 21 ... Shaft, A ... Sealed space, B ... Anti-sealed space, C ... Seal box.

Claims

[Claims for Utility Model Registration] 1. In a double mechanical seal having two sets of mechanical seals arranged in parallel in the axial direction within a seal box of a housing formed between a sealed space and a non-sealed space, both mechanical seals fixed rings are airtightly supported on the housing end walls at both ends of the seal box via a cartridge case, a bellows and a coil spring housed in the cartridge case, and are opposed to each other in the axial direction. A double mechanical seal characterized in that both fixed rings and a rotating ring that slides on both end faces are airtightly fixed to the outer peripheral surface of the shaft. 2. The double mechanical seal according to claim 1, wherein the rear end of the bellows is in contact with the inner wall surface of the rear end of the cartridge case.