JPS6424766U

JPS6424766U -

Info

Publication number: JPS6424766U
Application number: JP11899187U
Authority: JP
Priority date: 1987-08-03
Filing date: 1987-08-03
Publication date: 1989-02-10

Description

[Brief explanation of the drawing]

第１図ａ，ｂはこの考案による高圧用密封装置
の第１実施例を示し、第１図ａはピストンの溝内
に収納して密封した状態を示す概略図、第１図ｂ
はバツクアツプリングを示す概略断面図、第２図
ａ，ｂはこの考案による高圧用密封装置の第２実
施例を示し、第２図ａはピストンの溝内に収納し
て密封した状態を示す概略図、第２図ｂはバツク
アツプリングを示す概略断面図、第３図ａ，ｂは
この考案による高圧用密封装置の第３実施例を示
し、第３図ａはピストンの溝内に収納して密封し
た状態を示す概略図、第３図ｂはバツクアツプリ
ングを示す概略断面図、第４図は従来の密封装置
をピストンの溝内に収納した際の破損時を示す概
略図、第５図はピストンの溝とシリンダとの間隙
に対するバツクアツプリングの大きさを示す概略
図である。１，１１……シール部材、２，１２……ピスト
ン、３，１３……シリンダ、４，７，９，１４…
…バツクアツプリング、４ａ，７ａ……湾曲面、
５，１５……溝、５ａ，１５ａ……溝の奥面、８
……凹部、９ａ……テーパー面、ＲＡ，ＲＢ……
半径、Ａ，Ｂ……隙間、Ｗ……バツクアツプリン
グの肉厚、Ｈ……溝深さ。 Figures 1a and 1b show a first embodiment of the high pressure sealing device according to this invention, Figure 1a is a schematic diagram showing the state in which it is housed in the groove of the piston and sealed, Figure 1b
2 is a schematic sectional view showing a back-up spring, FIGS. 2a and 2b show a second embodiment of the high-pressure sealing device according to this invention, and FIG. 2a shows a state where it is housed in a groove of a piston and sealed Schematic diagram, FIG. 2b is a schematic sectional view showing a back-up spring, FIGS. 3a and b show a third embodiment of the high pressure sealing device according to this invention, and FIG. 3b is a schematic sectional view showing the back-up spring; FIG. 4 is a schematic view showing the conventional sealing device when it is damaged when it is housed in the groove of the piston; FIG. 5 is a schematic diagram showing the size of the back-up spring with respect to the gap between the piston groove and the cylinder. 1, 11... Seal member, 2, 12... Piston, 3, 13... Cylinder, 4, 7, 9, 14...
...backup spring, 4a, 7a...curved surface,
5, 15...groove, 5a, 15a...inner surface of groove, 8
...Concavity, 9a...Tapered surface, RA, RB...
Radius, A, B...Gap, W...Backup spring thickness, H...Groove depth.

Claims

[Claims for Utility Model Registration] (1) Backup springs 4, 7, and 9 disposed in a groove 5 formed in one member 2 in order to seal between the members 2 and 3 that move relatively. and a sealing member 1, the sealing member 1 is formed with a curved protrusion on the side that comes into contact with the backup springs 4, 7, and 9.
A high-pressure sealing device characterized in that the sides of the sealing member 1 7 and 9 that come into contact with the curved protrusion are shaped so as to be pressed against the inner surface 5a of the groove 5. (2) The sealing member 1 is an O-ring, and the back-up springs 4, 7 have concave curved surfaces 4a, 7a.
The curved surfaces 4a and 7a of No. 7 are in a curved state that matches the curved state of the abutment surfaces when the seal member 1 is arranged between the relatively movable members 2 and 3. The high pressure sealing device according to item 1. (3) The seal member 1 is an O-ring, and the back-up ring 9 has a tapered surface 9a.
The tapered surface 9a allows the back-up spring 9 to be pressed against the inner surface 5a of the groove 5 when the seal member 1 is pressed. sealing device.