CN2451818Y - Self-tightening ectodynamic sealing ring - Google Patents

Abstract

The utility model relates to a self-tightening ectodynamic sealing ring with long service life. The utility model comprises a circle of circular elastic sealing pad at the inner side and a circle of sealing ring at the outer side. The middle of a circle of circular wall body of the sealing pad is provided with a circle of hollow cavity and a concave groove with an inner side opening in the hollow cavity. An outer side wall of a circle of circular wall body of the sealing pad is fixedly connected with an inner side wall of the sealing ring.

Description

The outer dynamic seal ring of 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 outer 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: the outer dynamic seal ring of a kind of self tightening comprises an inboard circle cyclic spring sealing gasket; Its characteristics are: it also comprises a circle seal ring in the outside; Have a circle cavity and this cavity groove of opening to the inside in the middle part of the annular wall body of one circle of sealing gasket; The outer side wall of the annular wall body of one circle of sealing gasket is fixedlyed connected with the seal ring madial wall.

Because the outer hand hay cutter of the utility model is a circle cyclic spring sealing gasket for seal ring, inboard; Have groove on the annular wall body of sealing gasket to inner opening, liquid or gas enter in the groove 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 outer side wall play seal action, changed and traditional utilized elastomeric resiliently deformable and produce the principle that pressure seals, solved because elastomer degradation near sealed, compressive strain increases, flexibility decrease and cause the problem of leakage; Because the cyclic spring 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 self tightening working life of dynamic seal ring outward.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, drum type, V-type, U type and Glais ring, 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.

The outer dynamic seal ring of a kind of self tightening as shown in Figure 1 and Figure 2, comprises an inboard circle cyclic spring sealing gasket 2, a circle seal ring 3 of outer hand hay cutter; Have a circle cavity and this cavity C connected in star 1 of opening to the inside in the middle part of the annular wall body of one circle of sealing gasket, groove 1 also can adopt V-type groove or U type groove; Fixedly connected with common method with seal ring 1 madial wall in the outside 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, cyclic spring sealing gasket 2 madial walls, upper side wall and lower wall are close to hand hay cutter wall in the groove, seal ring 3 outer side walls are close to sealed, liquid or gas enter in the groove 1 on the sealing gasket by liquid line 4 or gas pipeline, by liquid or gas are pressurizeed, make sealing gasket 2 madial walls, upper side wall and lower wall be close to the groove madial wall, sealing gasket 2 outer side walls pressurize to seal ring, make the seal ring outer side 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 elongation be compensated by the cyclic spring sealing gasket, make the utility model still can play seal action.

Claims (2)

1, the outer dynamic seal ring of a kind of self tightening comprises an inboard circle cyclic spring sealing gasket (2); It is characterized in that: it also comprises a circle seal ring (3) in the outside; Have a circle cavity and this cavity groove of opening (1) to the inside in the middle part of the annular wall body of one circle of sealing gasket (2); The outer side wall of the annular wall body of one circle of sealing gasket (2) is fixedlyed connected with seal ring (3) madial wall.

2, the outer dynamic seal ring of a kind of self tightening, it is characterized in that: the groove (1) of the opening to the inside on the described sealing gasket (2) is a C type groove.

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