JPH0367767U

JPH0367767U -

Info

Publication number: JPH0367767U
Application number: JP12399789U
Authority: JP
Priority date: 1989-10-25
Filing date: 1989-10-25
Publication date: 1991-07-02

Description

[Brief explanation of drawings]

第１図は本考案ＰＴＦＥベローズ型メカニカル
シールの第一実施例を示す半裁断面図、第２図は
嵌合リングの変形例を示す要部断面図、第３図は
他の実施例を示す半裁断面図、第４図は従来のＰ
ＴＦＥベローズ型メカニカルシールを示す半裁断
面図、第５図は内周側圧力によるＰＴＦＥベロー
ズの変形状態を示す説明図である。４……シヤフト、５……シールリング、１０…
…ＰＴＦＥベローズ、１３……蛇腹状本体部分、
１３１，１３２……山部、１３３，１３４……谷
部、１４，１６，１７……嵌合リング、Ａ……密
封対象流体、δ……隙間。 Fig. 1 is a half-cut sectional view showing the first embodiment of the PTFE bellows type mechanical seal of the present invention, Fig. 2 is a sectional view of main parts showing a modified example of the fitting ring, and Fig. 3 is a half-cut sectional view showing another embodiment. The cross-sectional view, Figure 4, shows the conventional P
FIG. 5 is a half-cut sectional view showing a TFE bellows type mechanical seal, and is an explanatory view showing a deformed state of the PTFE bellows due to pressure on the inner peripheral side. 4...Shaft, 5...Seal ring, 10...
...PTFE bellows, 13...bellow-shaped main body part,
131, 132... Peak portion, 133, 134... Valley portion, 14, 16, 17... Fitting ring, A... Fluid to be sealed, δ... Gap.

Claims

[Claims for Utility Model Registration] 1 A PTFE bellows is airtightly joined between a seal ring and a rotating side or stationary side that supports this seal ring, and the fluid to be sealed is connected to the inner periphery of the seal ring sliding surface. In the mechanical seal existing in the space communicating with the side, a fitting ring divided in the circumferential direction and having a substantially trapezoidal cross section corresponding to the trough is inserted into the trough located at both ends of the bellows-shaped main body portion of the PTFE bellows. A PTFE bellows type mechanical seal that is loosely fitted through a gap. (2) A PTFE bellows is airtightly joined between the seal ring and the rotating side or stationary side that supports this seal ring, and the fluid to be sealed is in a space that communicates with the inner peripheral side of the seal ring sliding surface. In existing mechanical seals, a fitting ring is attached to the outer periphery of the bellows-shaped main body of the PTFE bellows, and the fitting ring is divided in the circumferential direction, and the inner peripheral surface has a continuous uneven shape corresponding to the outer surface of each peak and valley of the bellows-like main body. PTFE is characterized by being loosely fitted through a gap.
Bellows type mechanical seal.