JPS63178671U

JPS63178671U -

Info

Publication number: JPS63178671U
Application number: JP7124587U
Authority: JP
Priority date: 1987-05-13
Filing date: 1987-05-13
Publication date: 1988-11-18

Description

[Brief explanation of the drawing]

第１図は本考案に係るメカニカルシールの一実
施例を示す半截断面図、第２図は回転密封環の一
実施例を示す側面図、第３図は同背面図、第４図
は付勢部材の一実施例における常態時の形状を示
す正面図、第５図は同高温変形時の形状を示す正
面図、第６図は高温時に凸部に付勢される外力の
方向を一部拡大して示す説明図、第７図は密封端
面がうねり面に変形した状態を示す側面図、第８
図は回転密封環の他の実施例を示す背面図、第９
図は付勢部材の他の実施例おける常態時の形状を
示す斜視図、第１０図は同高温変形時の形状を示
す斜視図、第１１図は高温時に凸部に付勢される
外力の方向を一部拡大して示す説明図である。１…ケーシング、２…回転軸、４…回転密封環
、４Ａ…密封端面、４Ｘ…うねり面、６…静止密
封環、６Ａ…密封端面、１４ａ…１４ｌ…凹部、
１５ａ…１５ｌ…凸部、１６Ａ，１６Ｂ…付勢部
材。 Fig. 1 is a half-cut sectional view showing an embodiment of the mechanical seal according to the present invention, Fig. 2 is a side view showing an embodiment of the rotary seal ring, Fig. 3 is a rear view of the same, and Fig. 4 is a biasing FIG. 5 is a front view showing the shape of an embodiment of the member in normal state, FIG. 5 is a front view showing the shape when deformed at high temperature, and FIG. 6 is a partially enlarged view of the direction of external force applied to the convex portion at high temperature. FIG. 7 is a side view showing a state in which the sealed end surface is transformed into a undulating surface, and FIG.
The figure is a rear view showing another embodiment of the rotary sealing ring, No. 9
10 is a perspective view showing the shape of another example of the biasing member when it is deformed at high temperature. FIG. 11 is a perspective view showing the shape of the biasing member in the normal state. FIG. It is an explanatory view showing a direction partially enlarged. DESCRIPTION OF SYMBOLS 1... Casing, 2... Rotating shaft, 4... Rotating sealing ring, 4A... Sealing end surface, 4X... Waviness surface, 6... Stationary sealing ring, 6A... Sealing end surface, 14a... 14l... Recessed part,
15a...15l...Convex portion, 16A, 16B...Biasing member.

Claims

[Claims for Utility Model Registration] (1) In a mechanical seal in which a stationary sealing ring fixed to a casing and a rotating sealing ring fixed to a rotary shaft so as to be rotatable at the same time are in sliding contact at their sealing end faces, the rear surface of the rotating sealing ring axially uneven portions are formed at predetermined intervals in the circumferential direction, and when a set temperature is exceeded, the convex portions are biased approximately in the circumferential direction to deform the sealed end surface into a circumferentially undulating surface. A mechanical seal characterized in that a biasing member made of a shape memory alloy is assembled. (2) A utility model characterized in that the biasing member made of the shape memory alloy is a linear body that bridges and fixes between the convex portions of a plurality of pairs of adjacent convex portions. A mechanical seal according to registered claim 1. (3) Utility model registration claim 1, characterized in that the biasing member made of the shape memory alloy is an annular body having notched circular parts that fit into recesses at intervals.
Mechanical seal as described in section.