Heavy-load coaxial piston sealing ring

Abstract

The utility model relates to a heavy load coaxial piston sealing ring which comprises a sliding ring and an elastic body, the outer side face of the elastic body is tightly attached to the inner side face of the sliding ring, a groove is formed in the middle of the outer side face of the sliding ring, and lip-shaped protrusions are arranged on the two sides of the groove. The contact area of the elastic body in the heavy-load coaxial piston sealing ring and the wall of the sleeve installed in the sealing ring is increased, the elastic body is not prone to rolling over, the contact area is larger when the elastic body is pressed, and the sealing performance is better under the low-pressure working condition. In a word, the heavy-load coaxial piston sealing ring has the advantages of being good in sealing performance, high in abrasion resistance, long in service life, convenient to install and not prone to deformation.

Description

TECHNICAL FIELD

[0001] The utility model relates to seal ring technical field, in particular to a kind of heavy load coaxial piston seal ring. BACKGROUND

[0002] Seal ring is the circle for sealing effect, common have O type seal ring, matrix seal ring and Y type seal ring.Seal ring is used everywhere in mechanical structure.The existing piston seal ring is usually structured as lip ring, drum ring, cloth combination seal, and its main defects are single structure, single elastomer material, large sliding friction resistance, low service life, poor high pressure resistance and sealing performance. CONTENT OF UTILITY MODEL

[0003] In order to overcome the deficiencies of prior art, the utility model provides a kind of heavy load coaxial piston seal ring, including slip ring and elastomer, the elastomer outside elastomer of elastomer is tightly attached to the slip ring inner side of slip ring, the middle part of the slip ring outer side of slip ring is equipped with recess, the both sides of the recess are equipped with lip-shaped protrusion.

[0004] Preferably, the width of the slip ring is greater than the width of the elastomer.

[0005] Preferably, the cross section of the recess is "V" shaped.

[0006] Preferably, the elastomer outside surface and the slip ring inner side correspondingly are arc surfaces, and the centers of the arc surfaces formed by the elastomer outside surface and the slip ring inner side coincide.

[0007] Preferably, the cross section of the elastomer inside surface of the elastomer is straight line type.

[0008] Preferably, the elastomer is made of NBR material of butadiene rubber.

[0009] Preferably, the slip ring is made of polyurethane material, and the hardness of the slip ring is 95A of shao.

[0010] The utility model relates to a kind of heavy load coaxial piston sealing ring, the elastic body in the heavy load coaxial piston sealing ring and the sleeve wall contact area of being installed in the sealing ring increase, elastic body is not easy to roll, and contact area is larger when elastic body is under pressure, better sealing performance under low pressure working condition;Elastic body provides initial sealing compensation force, and it is more suitable for high pressure sealing;In addition, the wear resistance of the slip ring made of polyurethane material is stronger, and the service life is longer;The elastic body outer side of elastic body is tightly attached to the slip ring inner side of slip ring, so that the slip ring can better protect the elastic body, which is beneficial to improve the service life of the sealing ring, and the sealing effect will also be better;The middle part of the slip ring outer side of slip ring is provided with a groove, and the both sides of the groove are provided with lip-shaped protrusions, which has a double sealing effect and enhances the sealing performance of the sealing ring.In short, the heavy load coaxial piston sealing ring provided by the utility model has better sealing performance, stronger wear resistance, longer service life, is more convenient to install, and is not easy to deform. BRIEF DESCRIPTION OF DRAWINGS

[0011] Fig. 1 It is a structure schematic view of the heavy load coaxial piston sealing ring of the utility model;

[0012] Fig. 2 It is a sectional view of the heavy load coaxial piston sealing ring of the utility model;

[0013] Wherein: 1, slip ring;11, slip ring outer side;12, slip ring inner side;13, groove;14, lip-shaped protrusion;2, elastic body;21, elastic body outer side;22, elastic body inner side. DETAILED DESCRIPTION

[0014] In order to make the technical means, creative features, purposes and effects realized by the utility model easy to understand, the utility model is further described below in combination with specific embodiments, but the following embodiments are only preferred embodiments of the utility model, not all. Based on the embodiments in the embodiments, other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model. Unless otherwise specified, the experimental methods in the following embodiments are all conventional methods, and the materials, reagents and the like used in the following embodiments can be obtained from commercial channels unless otherwise specified.

[0015] Specific embodiment one, such as Figs. 1-2As shown, a heavy load coaxial piston sealing ring, including a slip ring 1 and an elastomer 2, the elastomer outer side surface 21 of the elastomer 2 is close to the slip ring inner side surface 12 of the slip ring 1, the middle part of the slip ring outer side surface 11 of the slip ring 1 is provided with a groove 13, both sides of the groove 13 are provided with a lip-shaped convex 14, the width of the slip ring 1 is greater than the width of the elastomer 2, the cross section of the groove 13 is in the shape of V, the elastomer outer side surface 21 and the slip ring inner side surface 12 correspondingly are arc surfaces, the centers of the arc surfaces formed by the elastomer outer side surface 21 and the slip ring inner side surface 12 coincide, the cross section of the elastomer inner side surface 22 of the elastomer 2 is in the shape of a straight line, the elastomer 2 is made of NBR material, the slip ring 1 is made of polyurethane material, and the hardness of the slip ring 1 is Shore 95A.

[0016] The elastomer 2 in the heavy load coaxial piston sealing ring is in contact with the sleeve wall installed in the sealing ring, the contact area is increased, the elastomer 2 is not easy to roll, the contact area is larger when the elastomer 2 is pressed, and better sealing performance is achieved under low pressure working conditions; the elastomer 2 provides an initial sealing compensation force, and is more suitable for high-pressure sealing; in addition, the slip ring 1 made of polyurethane material has higher wear resistance and longer service life; the elastomer outer side surface 21 of the elastomer 2 is close to the slip ring inner side surface 12 of the slip ring 1, so that the slip ring 1 can better protect the elastomer 2, the service life of the sealing ring is improved, and the sealing effect is better; the middle part of the slip ring outer side surface 11 of the slip ring 1 is provided with a groove 13, both sides of the groove 13 are provided with a lip-shaped convex 14, and the double sealing effect is achieved, and the sealing performance of the sealing ring is enhanced. In short, the heavy load coaxial piston sealing ring has the characteristics of better sealing performance, higher wear resistance, longer service life, easier installation and less deformation.

[0017] In the utility model, unless another definite stipulation and limitation, first feature is on second feature "on" or "under" can include first and second feature direct contact, also can include first and second feature is not direct contact but is through additional feature between them contact. Moreover, first feature is on second feature "on", "above" and "upper side" includes first feature is on second feature directly and obliquely, or only indicates first feature horizontal height is higher than second feature. First feature is on second feature "under", "below" and "lower side" includes first feature is on second feature directly and obliquely, or only indicates first feature horizontal height is less than second feature.

[0018] The basic principle, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only preferred examples of the present application and are not intended to limit the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A heavy-duty coaxial piston seal ring, comprising a slip ring (1) and an elastomer (2), characterized in that: The outer surface (21) of the elastic body (2) is closely attached to the inner surface (12) of the slip ring (1). The outer surface (11) of the slip ring (1) is provided with a groove (13) in the middle, and the groove (13) is provided with lip-shaped protrusions (14) on both sides.

2. The heavy-duty coaxial piston seal ring according to claim 1, characterized in that: The width of the slip ring (1) is greater than the width of the elastic body (2).

3. The heavy-duty coaxial piston seal ring according to claim 1, characterized in that: The cross-section of the groove (13) is "V" shaped.

4. The heavy-duty coaxial piston seal ring according to claim 1, characterized in that: The outer surface (21) of the elastic body corresponds to the inner surface (12) of the slip ring in an arc shape, and the centers of the arc shapes formed by the outer surface (21) of the elastic body and the inner surface (12) of the slip ring coincide.

5. A heavy-duty coaxial piston seal ring according to claim 1, characterized in that: The cross-section of the inner surface (22) of the elastic body (2) is linear.

6. A heavy-duty coaxial piston seal ring according to claim 1, characterized in that: The elastomer (2) is made of nitrile rubber (NBR).

7. A heavy-duty coaxial piston seal ring according to claim 1, characterized in that: The slip ring (1) is made of polyurethane material and has a hardness of Shore 95A.

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