CN202301916U

CN202301916U - Combined seal ring for CST hole

Info

Publication number: CN202301916U
Application number: CN201120412458XU
Authority: CN
Inventors: 尤建清
Original assignee: TAICANG MINGYU SEAL CO Ltd
Current assignee: TAICANG MINGYU SEAL CO Ltd
Priority date: 2011-10-26
Filing date: 2011-10-26
Publication date: 2012-07-04
Anticipated expiration: 2021-10-26

Abstract

The utility model relates to a combined seal ring for a CST hole, which comprises a T-shaped elastic rubber body, a seal ring arranged at the upper portion of the T-shaped elastic rubber body and a retainer ring arranged at the right-angle position of the T-shaped elastic rubber body, wherein the T-shaped elastic rubber body, the seal ring and the retainer ring are in matched connection with each other. The limitations that anti-leakage and anti-extrusion performance is poor and the requirement for piston gaps is large when an existing seal piece is under heavy load are changed, and the service life is prolonged under the condition that the seal effect is improved.

Description

CST uses combined seal ring in the hole

Technical field

The utility model relates to the Sealing field, is specifically related to the combined seal ring of piston in liquid, the Pneumatic Transmission and cylinder body.

Background technique

Along with domestic economy constantly develops; The national life level improves constantly; The industrial automatization of numerous domestic industrial and mining enterprise further improves; And sealed product performer key player in industrial automation, the quality of sealed product quality plays key effect aspect the fluid dynamic transmission in industrial automation.Particularly in concerning the national great type equipment of national economy, stable, the quality of sealed product performance reliable and to the tolerance of various flowing mediums all is very important.Simultaneously, in the great at home type key equipment, adopt the Sealing of developed countries import; Not only cost an arm and a leg; And the arrival cycle is long, during the apparatus maintenance transformation, causes heavy losses to enterprise, causes severe contamination to environment; Destroy natural, ecological, and imported product can not be dealt with problems sometimes.

At present, maximum Sealing of using on the market is an O type circle, and it produces prestressing force by the extrusion-deformation of when assembling and reaches sealing effect.Its feature is: simple in structure, withstand voltage height, volume are little.But because wearing and tearing are big in the movement process, be in deformation state for a long time, be prone to produce permanent deformation forfeiture elasticity, operating life is short.Though mostly adopt combining form now, be basic resilient support promptly with 0 type circle, add the seal ring of a material that usefulness is wear-resisting, corrosion resistant is lit up in 0 type circle outer ring, with the purpose that realizes increasing the service life.But, be that the combined seal ring that base growth is got up can not keep good sealing effect the long period equally with 0 type circle owing to keep away the deadly defect that produces permanent deformation in the unavoidable use as 0 RunddichtringO of basic resilient support.So adopt the liquid of this type sealing technique, pneumatic cylinder shorter working life.

Summary of the invention

Goal of the invention: the purpose of the utility model is to overcome the deficiency of above-mentioned prior art, provides a kind of and has good anti-shackle ability, anti-extrudes with wear-resisting property, is particularly suitable for the combined seal ring of long running situation.

Technological scheme: in order to solve the problems of the technologies described above; The described combined seal ring of the utility model, it comprises T shape elastic gel, is located at the seal ring on this T shape elastic gel top; And the back-up ring that is arranged on place, said T shape elastic gel right angle, the connection of working in coordination between them.

Both sides, said T shape elastic gel bottom are provided with chamfering.

The length of said seal ring is slightly larger than the length of that section of said T shape elastic gel top.

Said back-up ring and place, T shape elastic gel right angle leave the gap.

Said T shape elastic gel is a nitrile butadiene rubber.

Said seal ring is a teflon.

Said back-up ring is nylon or polyoxymethylene.

Beneficial effect: the utility model compared with prior art, its remarkable advantage is: adopt the seal ring of combining form, changed former Sealing under heavy duty; Anti-reveal anti-extrude relatively poor; The piston clearance is required bigger limitation, under the situation that improves sealing effect, also improved working life.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Wherein:

1, T shape elastic gel; 2, seal ring; 3, back-up ring; 4, chamfering.

Embodiment

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

As shown in Figure 1, the described combined seal ring of the utility model, it comprises T shape elastic gel 1, is located at the seal ring 2 on this T shape elastic gel 1 top, and the back-up ring 3 that is arranged on place, said T shape elastic gel 1 right angle, the connection of working in coordination between them; Both sides, said T shape elastic gel 1 bottom are provided with chamfering 4; The length of said seal ring 2 is slightly larger than the length of said T shape elastic gel 1 that section of top; Said back-up ring 3 leaves the gap with place, T shape elastic gel 1 right angle; Said T shape elastic gel 1 is a nitrile butadiene rubber; Said seal ring 2 is filled polytetrafluoroethylenes; Said back-up ring 3 is nylon or polyoxymethylene.The utility model has good anti-shackle ability, anti-extrudes with wear-resisting property well under the high pressure heavy duty, be particularly suitable for the situation of long stroke, adapts to bigger piston clearance.The utility model adopts the seal ring of combining form, has changed former Sealing under heavy duty, and anti-the leakage anti-ly extruded relatively poorly, and the piston clearance is required bigger limitation, under the situation that improves sealing effect, also improved working life.

The utility model does not relate to all identical with the existing technology existing technology that maybe can adopt of part to be realized.

Claims

1.CST combined seal ring is used in the hole; It is characterized in that: it comprises T shape elastic gel (1); Be located at the seal ring (2) on this T shape elastic gel (1) top, and the back-up ring (3) that is arranged on said T shape elastic gel (1) place, right angle, the connection of working in coordination between them.

2. CST according to claim 1 uses combined seal ring in the hole, it is characterized in that: said T shape elastic gel (1) both sides, bottom are provided with chamfering (4).

3. CST according to claim 1 uses combined seal ring in the hole, it is characterized in that: the length of said seal ring (2) is slightly larger than the length of that section of said T shape elastic gel (1) top.

4. CST according to claim 1 uses combined seal ring in the hole, it is characterized in that: said back-up ring (3) leaves the gap with T shape elastic gel (1) place, right angle.

5. CST according to claim 1 uses combined seal ring in the hole, it is characterized in that: said T shape elastic gel (1) is a nitrile butadiene rubber.

6. CST according to claim 1 uses combined seal ring in the hole, it is characterized in that: said seal ring (2) is a teflon.

7. CST according to claim 1 uses combined seal ring in the hole, it is characterized in that: said back-up ring (3) is nylon or polyoxymethylene.