CN2451817Y

CN2451817Y - Self-tightening endodynamic seal ring

Info

Publication number: CN2451817Y
Application number: CN 00256947
Authority: CN
Inventors: 李波; 孙冬梅
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-12-05
Filing date: 2000-12-05
Publication date: 2001-10-03
Anticipated expiration: 2010-12-05

Abstract

The utility model relates to a self-tightening endodynamic seal ring with long service life. The utility model comprises a circle of circular elastic seal pad at the outer side and a circle of seal ring at the inner side. A circle of concave groove with a downward opening is arranged on a circle of circular wall body of the seal pad. The inner side of a circle of circular wall body of the seal pad is fixedly connected with the outer side wall of the seal ring.

Description

Dynamic seal ring in the self tightening

The utility model relates to a kind of seal ring.

The seal ring that uses has Y type, V-type cyclic spring seal ring at present.This seal ring is because self elastomer is easily aging, and compressive strain increases makes flexibility decrease, and causes poorly sealedly, produces and leaks; Because this seal ring directly contacts with sealed, when work, seal ring with sealed between be a kind of dynamic sealing, this seal ring causes leakage easily owing to easily being worn, so this seal ring weak point in working life.

The purpose of this utility model provides a kind of interior dynamic seal ring of self tightening of long service life.

For realizing the purpose of this utility model, the technical solution adopted in the utility model is: dynamic seal ring in a kind of self tightening, a circle cyclic spring sealing gasket that comprises the outside, have the groove of a circle on the annular wall body of one circle of sealing gasket under shed, its characteristics are: dynamic seal ring also comprises an inboard circle seal ring in this self tightening, fixedlys connected with the seal ring outer side wall in the inboard of the annular wall body of a circle of sealing gasket.

Because hand hay cutter is seal ring in the utility model, the outside is the elastic sealing gasket that has groove of a circle annular, liquid or gas enter in the open recess of sealing gasket by liquid line or gas pipeline, by liquid or gas are pressurizeed, sealing gasket is pressurizeed to the seal ring sidewall, thereby make the seal ring madial wall play seal action near sealed, changed and traditional utilized elastomeric resiliently deformable and produce the principle that pressure seals, solved because elastomer degradation, compressive strain increases, flexibility decrease and cause the problem of leakage; Because elastic seal ring does not directly contact sealed, it between seal ring and the seal ring static seal, be motive sealing between seal ring and sealed, solved the leakage that is worn and causes owing to elastic seal ring, thereby prolonged the working life of the interior dynamic seal ring of self tightening.The utility model can be used for the hydraulic pressure under the various occasions or the sealing of vapour pressure oil cylinder and pipeline telescopic compensator, can replace various seal rings such as Y type, flower bud type, V-type, U type, is widely used in every profession and trades such as machinery, mine, oil, chemical industry.

The utility model will be further described below in conjunction with accompanying drawing.

Fig. 1 is a kind of sectional view of the present utility model;

Fig. 2 is the worm's eye view of Fig. 1;

Fig. 3 is a kind of scheme of installation of the present utility model.

Dynamic seal ring in a kind of self tightening as shown in Figure 1 and Figure 2, encloses a circle seal ring 1 of common cyclic spring sealing gasket 2, interior hand hay cutter one outside comprising; Have the common Y type groove 3 of a circle under shed on the annular wall body of one circle of sealing gasket, groove 3 also can adopt common V-type groove or common U type groove; Fixedly connected with common method with seal ring 1 outer side wall in the inboard of the annular wall body of one circle of sealing gasket 2; Seal ring is made by teflon and filling-modified thing thereof or metal spring sheet.

As shown in Figure 3, a kind of the utility model is installed in the fixing groove, external sidewall of the annular wall of cyclic spring sealing gasket 2 and upper side wall are close to hand hay cutter wall in the groove, the seal ring madial wall is close to sealed, liquid or gas enter in the open recess 3 of sealing gasket by liquid line 4 or gas pipeline, by liquid or gas are pressurizeed, make the external sidewall of annular wall and the upper side wall of sealing gasket 2 be close to the groove madial wall, 2 pairs of seal ring pressurizations of sealing gasket, make the seal ring madial wall near sealed, thereby make the utility model play seal action.Because very little teflon and the filling-modified thing thereof of friction ractor made seal ring, increased wear-resisting property of the present utility model greatly, even seal ring is worn, because the pressure of system itself, can the seal ring compression be compensated by elastic sealing gasket, make the utility model still can play seal action.

Claims

1, dynamic seal ring in a kind of self tightening, a circle cyclic spring sealing gasket (2) that comprises the outside, have the groove (3) of a circle on the annular wall body of one circle of sealing gasket (2) under shed, it is characterized in that: dynamic seal ring also comprises an inboard circle seal ring (1) in this self tightening, fixedlys connected with seal ring (1) outer side wall in the inboard of the annular wall body of a circle of sealing gasket (2).

2, dynamic seal ring in a kind of self tightening, it is characterized in that: the groove under shed on the described sealing gasket (2) (3) is a Y type groove.