CN2542890Y

CN2542890Y - Sealing ring

Info

Publication number: CN2542890Y
Application number: CN 02234544
Authority: CN
Inventors: 吴维岳
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-05-08
Filing date: 2002-05-08
Publication date: 2003-04-02
Anticipated expiration: 2012-05-08

Abstract

The utility model relates to a sealing circle, which is made of rubber or flexible compound rubber, wherein, the bottom side face and the two side faces that are connected with the bottom are all plane. When the sealing circle is sleeved inside a dovetail groove, the three side faces can be tightly contacted with the inner wall face of the dovetail groove respectively, so that the sealing circle will not retort and deform in the sliding process, thus exerting a favorable sealing effect.

Description

A kind of seal ring

Technical field

The utility model relates to a kind of seal ring, refers in particular to a kind of seal ring that can torsional deflection in slipping can not bring into play good sealing effect.

Background technique

Existing seal ring (as depicted in figs. 1 and 2) is made by rubber or elasticity synthetic rubber, comprises a ring body 1 ' and a mesopore 2 '.The section of ring body 1 ' is circular, when ring body 1 ' is nested with in the dovetail groove 4 ' at valve 3 ', circular by section at ring body 1 ', therefore in the slipping of valve 3 ', seal ring can because of with the torsional deflection that rubs of valve seat (not shown), can't bring into play good sealing effect.

Summary of the invention

The purpose of this utility model is to provide a kind of seal ring that can torsional deflection can not bring into play good sealing effect.

The purpose of this utility model makes and realizes by following technological means: a kind of seal ring, comprise a ring body and a mesopore, ring body is made by rubber or elasticity synthetic rubber, mesopore is the permeable type that can place for the central shaft of valve, the bottom side of ring body all becomes plane with the bi-side that link to each other with bottom side, and the angle on two planes that link to each other is equal to or greater than 90 °, and the width of bottom side is slightly less than the bottom width of the dovetail groove of valve.These three sides can closely contact with the dovetail groove bottom side of valve and three internal faces of two examples respectively, make seal ring in slipping, though its circular-arc upper-end surface and valve seat friction can not form torsional deflection, can bring into play good sealing effect.

The width of the circular-arc upper-end surface of described a kind of seal ring is equal to or greater than the width of the opening of dovetail groove.The width of the circular-arc upper-end surface of described a kind of seal ring also can be equal to or less than the A/F of dovetail groove.

Advantage of the present utility model is: because the bottom side of seal ring can closely contact with three internal faces of dovetail groove bottom side and both sides respectively with bi-side, when seal ring in slipping, though circular-arc upper-end surface rubs with valve seat, but can not form torsional deflection, can bring into play good sealing effect.

Description of drawings

Fig. 1 is the stereogram of existing seal ring.

Fig. 2 is the sectional drawing of existing seal ring.

Fig. 3 is the enforcement illustration of existing seal ring.

Fig. 4 is the three-dimensional exploded view of the utility model first embodiment's primary component.

Fig. 5 is the utility model first embodiment's a sectional drawing.

Fig. 6 is the utility model first embodiment's a combination section.

Fig. 7 is the utility model second embodiment's a sectional drawing.

Fig. 8 is the utility model second embodiment's a combination section.

Embodiment

Describe structure of the present utility model in detail below in conjunction with accompanying drawing.

As Fig. 4, Fig. 5 with Figure 6 shows that first embodiment of the present utility model, include a ring body 1 and a mesopore 2, wherein: ring body 1 is made by rubber or elasticity synthetic rubber, bottom side 11 all becomes plane with the bi-side 12 that link to each other with this bottom side, and the angle that links to each other between two planes is equal to or greater than 90, and the width of bottom side 11 is slightly less than the bottom width of dovetail groove 32; 13 one-tenth of upper-end surfaces are circular-arc, and the width of upper-end surface 13 is equal to or greater than the open end width of dovetail groove 32, and the section of whole ring body 1 slightly becomes the arched door shape.The identical permeable type that is with existing seal ring of mesopore 2 can place for the central shaft 31 of valve 3.

As shown in Figure 6, when being nested with ring body 1 in the dovetail groove 32 of valve 3, three sides 11 can closely contact with three internal faces of dovetail groove 32 bottom sides and both sides respectively with 12, and make the circular-arc upper-end surface 13 of ring body 1 be exposed to the outer and valve seat (not shown) of dovetail groove 32 to connect airtight.Because three sides 11 can closely contact with three internal faces of dovetail groove 32 bottom sides and both sides respectively with 12, when seal ring in slipping, though circular-arc upper-end surface 13 and valve seat friction can not form torsional deflection, can bring into play good sealing effect.

Be second embodiment of the present utility model as shown in Figure 7 and Figure 8, comprise a ring body 1 and a mesopore 2, different with first embodiment is the change of seal ring shape, and the width of promptly circular-arc upper-end surface 13 is equal to or less than the open end width of dovetail groove 32, makes the section of whole ring body 1 slightly become convex character shape.

As shown in Figure 8, when being nested with ring body 1 in the dovetail groove 32 of valve 3, three sides 11 can closely contact with three internal faces of dovetail groove 32 bottom sides and both sides respectively with 12, and the circular-arc upper-end surface 13 that makes ring body 1 is exposed outside dovetail groove 32 and the valve seat (not shown) connects airtight, because three sides 11 can closely contact with three internal faces of dovetail groove 32 bottom sides and both sides respectively with 12, make seal ring in slipping, though circular-arc upper-end surface 13 rubs with valve seat, but can not form torsional deflection, can bring into play good sealing effect.

Claims

1, a kind of seal ring, comprise a ring body and a mesopore, ring body is made by rubber or elasticity synthetic rubber, mesopore is the permeable type that can place for the central shaft of valve, it is characterized in that: the bottom side of ring body all becomes plane with the bi-side that link to each other with bottom side, and the angle on two planes that link to each other is equal to or greater than 90 °, and the width of bottom side is slightly less than the bottom width of the dovetail groove of valve.

2, a kind of seal ring according to claim 1, it is characterized in that: the width of circular-arc upper-end surface is equal to or greater than the width of the opening of dovetail groove.

3, a kind of seal ring according to claim 1 is characterized in that: the width of circular-arc upper-end surface is equal to or less than the A/F of dovetail groove.