A combined seal ring for preventing internal leakage

Abstract

The utility model discloses a prevent the combination sealing ring of internal leakage, sealing ring inside is equipped with two interval arc convex strip no.

Description

Technical Field

[0001] This utility model relates to the technical field of combined sealing rings for preventing internal leakage, specifically to a combined sealing ring for preventing internal leakage. Background Technology

[0002] In the application of bidirectional reciprocating hydraulic cylinders, internal leakage often occurs, which uses sealing rings with two flat raised strips on the inner and outer sides. Research has found that when there is a pressure difference on both sides of the piston inside the cylinder, the flat contact of the sealing ring's raised strips is not tight, causing internal leakage; in addition, after a period of use, due to wear, the flat raised strips will also fail to seal properly. Utility Model Content

[0003] The purpose of this invention is to provide a combined sealing ring to prevent internal leakage, thereby solving the problems mentioned in the background art.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0005] This utility model provides a combined sealing ring to prevent internal leakage. The inner side of the sealing ring is provided with two spaced arc-shaped protrusions, and the outer side of the sealing ring is provided with arc-shaped protrusions and two arc-shaped protrusions. The arc-shaped protrusions are located in the middle of the two arc-shaped protrusions and protrude further outward.

[0006] The sealing ring, arc-shaped protrusion one, arc-shaped protrusion two, and arc-shaped protrusion three are fixed together and are all made of rubber.

[0007] As an improvement, the space between the two arc-shaped protrusions is concave, and the space between the arc-shaped protrusions is concave.

[0008] The advantages of this utility model compared with the prior art are as follows: the first, second and third arc-shaped protrusions are all arc-shaped, with a tight sealing line, so that even when there is a pressure difference on both sides of the piston in the cylinder, there will be no sealing failure; the second arc-shaped protrusion that protrudes further outward between the two third arc-shaped protrusions not only improves the sealing performance of the sealing ring, but also increases the applicable range and service life of the sealing ring. Attached Figure Description

[0009] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings listed below are only some structural schematic diagrams of this utility model, and not all of them.

[0010] Figure 1 This is a schematic diagram of the structure of a combined sealing ring for preventing internal leakage according to this utility model.

[0011] Figure 2 This is a diagram showing the usage status of a combined sealing ring for preventing internal leakage according to this utility model.

[0012] Figure label:

[0013] 1. Sealing ring; 2. Arc-shaped convex strip one; 3. Arc-shaped convex strip two; 4. Arc-shaped convex strip three; 5. Oil cylinder; 6. Piston; 7. Stabilizing ring; 8. Support ring. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] In the description of the embodiments of this utility model, it should be noted that if terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" appear, the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0016] Furthermore, the terms "first," "second," and "third" are used only for distinguishing descriptions and should not be interpreted as indicating or implying relative importance. The use of terms such as "horizontal," "vertical," and "suspended" does not imply that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," not that the structure must be perfectly horizontal, but can be slightly tilted.

[0017] In the description of the embodiments of this utility model, the terms "multiple" or "several" refer to at least two.

[0018] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0019] This embodiment is combined with the appendix Figures 1 to 2 This paper provides a detailed description of a combination sealing ring for preventing internal leakage.

[0020] This embodiment provides a combined sealing ring to prevent internal leakage. The inner side of the sealing ring 1 is provided with two spaced arc-shaped protrusions 2, and the outer side of the sealing ring 1 is provided with arc-shaped protrusions 3 and two arc-shaped protrusions 4. The arc-shaped protrusions 3 are located between the two arc-shaped protrusions 4 and protrude further outward.

[0021] The sealing ring 1, arc-shaped protrusion 1 2, arc-shaped protrusion 2 3 and arc-shaped protrusion 3 4 are fixed together and are all made of rubber and are formed by rubber molding.

[0022] The space between the two arc-shaped protrusions 1 and 2 is concave, and the space between the arc-shaped protrusions 2 and 3 and 4 is concave.

[0023] The functions of the recessed area are: 1. During installation and under pressure, the raised strip will deform under compression. The recessed area provides space for deformation, preventing the rubber material from being over-compressed, leading to stress relaxation and permanent deformation, thereby extending the life of the seal. 2. The recessed area provides temporary containment space for the medium scraped off by the raised strip and helps to guide it back to the medium side through capillary action. 3. Pressure acts on the root of the raised strip through the recessed area, pressing it more tightly against the shaft surface to form a self-tightening seal. The higher the pressure, the better the sealing effect. 4. This structure can also better adapt to the dimensional tolerances and deformation of the cavity.

[0024] Main sealing function: The two curved convex lip surfaces form an interference fit, creating two independent contact lines. This constitutes a double sealing barrier, greatly improving the reliability of the seal. Even if one lip is worn or temporarily damaged, the other can still function.

[0025] In specific implementation, such as Figure 1 The sealing ring 1 has a certain interference fit. In use, place the sealing ring 1 into the recess of the piston 6, with the arc-shaped protrusion 2 pressing against the piston 6, and the arc-shaped protrusions 3 and 4 facing outwards. Then, insert the two stabilizing rings 7 into the gaps on either side of the sealing ring 1, and then place the two support rings 8 around the outside of the stabilizing rings 7. Finally, insert the entire ring into the oil cylinder 5, with the arc-shaped protrusions 3 and 4 compressing against the inner wall of the oil cylinder 5, and the arc-shaped protrusion 2 compressing against the piston 6. Figure 2 .

[0026] The present invention and its embodiments have been described above. This description is not restrictive, and the actual scope of protection is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this invention should be included within the scope of protection of this invention. Therefore, the scope of protection of this invention should be determined by the scope of the claims.

Claims

1. A combined sealing ring for preventing internal leakage, characterized in that, The inner side of the sealing ring (1) is provided with two spaced arc-shaped protrusions (2), and the outer side of the sealing ring (1) is provided with arc-shaped protrusions (3) and two arc-shaped protrusions (4). The arc-shaped protrusions (2) are located in the middle of the two arc-shaped protrusions (3) and protrude further outward. The sealing ring (1), the first arc-shaped protrusion (2), the second arc-shaped protrusion (3), and the third arc-shaped protrusion (4) are fixed together and are all made of rubber.

2. The combined sealing ring for preventing internal leakage according to claim 1, characterized in that, The space between the two arc-shaped protrusions (2) is concave, and the space between the arc-shaped protrusions (3) and (4) is concave.

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