JPH0243564U - - Google Patents

Description

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本考案の一実施例の使用状態を示す低
温時の半断面図、第２図は板ばねの斜視図、第３
図は同実施例の使用状態を示す高温時の半断面図
、第４図は他の実施例の使用状態を示す半断面図
である。 １……ＰＴＦＥ製リツプ部材、３……内径摺動
部、９……板ばね、９ａ……ばね材、９ｂ……形
状記憶合金、９ｃ……熱膨張率の小さい金属板、
９ｄ……熱膨張率の大きい金属板、１１……内径
部、１２……すり割り、１３……外環、１６……
ハウジング、１７……シヤフト。 Fig. 1 is a half-sectional view at low temperature showing an example of the use of an embodiment of the present invention, Fig. 2 is a perspective view of a leaf spring, and Fig. 3 is a perspective view of a leaf spring.
The figure is a half-sectional view at high temperature showing the usage state of the same embodiment, and FIG. 4 is a half-sectional view showing the usage state of another embodiment. 1... PTFE lip member, 3... Inner diameter sliding part, 9... Leaf spring, 9a... Spring material, 9b... Shape memory alloy, 9c... Metal plate with small coefficient of thermal expansion,
9d...Metal plate with a large coefficient of thermal expansion, 11...Inner diameter part, 12...Slot, 13...Outer ring, 16...
Housing, 17...Shaft.

Claims (1)

【実用新案登録請求の範囲】 １ ハウジングの内周面に嵌め込まれる外環に、
ＰＴＦＥ製リツプ部材の外径部を固定した構造を
有するリツプ型シールにおいて、前記外環に、内
径部が周方向に複数箇所で分割された環状の板ば
ねを、前記リツプ部材の密封対象流体側に位置し
て取着し、この板ばねは、低温雰囲気では前記内
径部が前記リツプ部材の内径摺動部の外周面に圧
接し、高温雰囲気では前記内径部が外径側へ変位
する２方向性の感温差動材からなることを特徴と
するリツプ型シール。 ２ 前記感温差動材は、形状記憶合金を用いたも
のであることを特徴とする請求項１に記載のリツ
プ型シール。 ３ 前記感温差動材は、互いに熱膨張率の異なる
金属板を貼り合わせたものであることを特徴とす
る請求項１に記載のリツプ型シール。[Claims for Utility Model Registration] 1. An outer ring fitted into the inner peripheral surface of the housing,
In a lip type seal having a structure in which the outer diameter part of a PTFE lip member is fixed, an annular leaf spring whose inner diameter part is divided at multiple points in the circumferential direction is attached to the outer ring on the side of the fluid to be sealed of the lip member. The leaf spring has two directions: in a low temperature atmosphere, the inner diameter portion comes into pressure contact with the outer peripheral surface of the inner diameter sliding portion of the lip member, and in a high temperature atmosphere, the inner diameter portion is displaced toward the outer diameter side. A lip-type seal characterized by being made of a thermosensitive differential material. 2. The lip type seal according to claim 1, wherein the temperature-sensitive differential material is made of a shape memory alloy. 3. The lip-type seal according to claim 1, wherein the temperature-sensitive differential material is made by laminating metal plates having different coefficients of thermal expansion.