The piston seal of rectangle support ring circular arc sealing surface
The utility model belongs to hydraulic pressure, pneumatic seal technical field, relates to a kind of to-and-fro motion piston seal, is specially the piston seal of rectangle support ring circular arc sealing surface.
Existing piston seals common structure and is Y shape circle, cydariform circle, U-shaped envelope, folder cloth combination seal etc., and its major defect is problems such as structure is single, the elastomer material is single, sliding-frictional resistance is big, working life is low, anti-high pressure difference.
Summary of the invention
The utility model is problems such as the structure of piston seal is single in the prior art, sealing material is complementary, pressure stability is poor, working life is short, leakage in order to solve, and a kind of piston seal of rectangle support ring circular arc sealing surface is provided.Such closure size is stablized, is met tolerance, compact structure, anti-ly extrudes damages, wear-resistant, has pressure stability under load, and good, the anti-extrusion performance of axially locating is splendid, high abrasion, the low friction, and no creeping phenomenon, high low pressure sealability are reliable.
The utility model adopts following technological scheme to realize: the piston seal of rectangle support ring circular arc sealing surface, by an elastic ring that plays the sealing booster action, to be placed in the seal ring on the elastic ring and to be positioned at the seal ring two ends and to be placed in cross section, step place, elastic ring two ends be that the support ring of rectangle constitutes, the sealing surface of seal ring (outer round surface of seal ring) is an arc-shaped structure, and the cross section of elastic ring is a T shape.
Main improvement of the present utility model is that all parts adopt unique technology to guarantee the precision and the whole sealing effect of product, and the sealing surface of seal ring adopts arc-shaped structure, and is easy for installation, friction ractor is little; Elastic ring is the T shape sealed member of band groove, the deformation when effectively compensation sealing is along with working conditions change; Bad seals when the design of rectangle support ring prevents high pressure and distortion reduce the wearing and tearing to sealing during to-and-fro motion; The piston seal that constitutes with upper-part has made full use of the characteristic that each parts and material itself are had, and can play the effect of low pressure no leakage, the anti-damage of high pressure along with the variation of operating mode, and have the working life of length.Adopt Sealing described in the utility model to improve the anti-side pressure and the wear resistance of sealing, can bear the sealing medium of low pressure, high pressure for a long time, stop its sealing medium to leak out Seal cage, reduced the to-and-fro motion number of times when frequent seal ring and cylinder body friction produce heating and wearing and tearing, install simple and convenient, easy damaged seal ring not.
The relative prior art of the utility model has following beneficial effect: adopted unique sealing material and geometrical shape, compact structure, monolithic stability, good seal performance, friction factor are little, having good anti-pressure release ability, anti-extruding and working life, is a kind of bidirectional piston sealing that is widely used under the severe duty.
Description of drawings
Fig. 1 is a structural representation of the present utility model
Among the figure: 1, seal ring, 2, support ring, 3, elastic ring
In conjunction with the accompanying drawings embodiment of the present utility model is described further, embodiment is used for illustrating of the present utility model, rather than it is imposed any restrictions.
The piston seal of rectangle support ring circular arc sealing surface, by an elastic ring 3 that plays the sealing booster action, to be placed in the seal ring 1 on the elastic ring 3 and to be positioned at the seal ring two ends and to be placed in cross section, step place, elastic ring two ends be that the support ring 2 of rectangle constitutes, the sealing surface of described seal ring 1 (outer round surface of seal ring) is an arc-shaped structure, and the cross section of elastic ring 3 is a T shape.The size of piston seal can require design, customized according to reality, alternative original sealing configuration under the situation that does not change existing groove, and this structure has advantages such as anti-high pressure, high abrasion, good sealing effect, is used for the heavy-duty machinery industry more.