Wear-resistant sealing ring structure

Abstract

The utility model discloses a kind of wear-resistant sealing ring structures, including main component, the main component includes inner layer sealing body, intermediate elastic buffer layer and annular wear-resistant convex rib.The utility model is provided with annular wear-resistant convex rib in outer layer wear-resistant body outer side wall, greatly promote the wear resistance of sealing ring, by wear-resistant material and annular wear-resistant convex rib structure concentrated friction surface, stress dispersion, significantly reduce wear rate;By opening oil guide hole and oil storage cavity in outer layer wear-resistant body, lubricating medium can be penetrated to annular wear-resistant convex rib and sealing surface contact place to form lubricating film, further reduce friction coefficient, avoid the problem that sealing ring is caused by continuous friction and leads to wear aggravation;By annular wave spring in the intermediate elastic buffer layer is embedded, compensate wear gap, avoid the problem that sealing gap increases and sealing fails due to wear, significantly prolong the overall service life of sealing ring, comprehensively improve the problem that sealing ring wears fast, is easily invalid, maintenance cost is high.

Description

Technical Field

[0001] This utility model relates to the field of sealing technology, specifically to a wear-resistant sealing ring structure. Background Technology

[0002] As a commonly used sealing element, sealing rings are widely used in pipeline connections, mechanical equipment component connections, and other scenarios. Their main function is to prevent media leakage and ensure the normal operation of equipment or pipeline systems.

[0003] Existing sealing rings are prone to wear during long-term use due to continuous friction with contacting components. This is especially true in dynamic sealing scenarios, such as rotary shaft seals and reciprocating motion component seals, where the wear rate of the sealing rings is even faster, leading to decreased sealing performance or even failure. This necessitates frequent replacement of the sealing rings, which not only increases maintenance costs but may also affect the normal operating efficiency of the equipment and cause inconvenience to production. Therefore, a wear-resistant sealing ring structure is proposed. Utility Model Content

[0004] The purpose of this invention is to provide a wear-resistant sealing ring structure to solve one of the problems mentioned in the background art.

[0005] This utility model is implemented by the following technical solution: a wear-resistant sealing ring structure, including a main component, the main component including an inner sealing body, an intermediate elastic buffer layer, an outer wear-resistant body, an annular wave spring, an annular wear-resistant groove and an annular wear-resistant rib, the outer wall of the inner sealing body is fixedly connected to the intermediate elastic buffer layer, the outer wall of the intermediate elastic buffer layer is fixedly connected to the outer wear-resistant body, the annular wave spring is provided inside the intermediate elastic buffer layer, the outer wall of the annular wave spring is attached to the inner wall of the outer wear-resistant body, the inner wall of the annular wave spring is attached to the outer wall of the inner sealing body, the outer wall of the outer wear-resistant body is provided with a plurality of annular wear-resistant grooves, and the inner wall of each of the plurality of annular wear-resistant grooves is fixedly connected to an annular wear-resistant rib.

[0006] As a further preferred embodiment of this technical solution: multiple oil guide holes are evenly distributed around the outer wall of the outer wear-resistant body near the two adjacent annular wear-resistant grooves, and multiple oil storage cavities are provided inside the outer wear-resistant body, with the oil guide holes communicating with the oil storage cavities.

[0007] As a further preferred embodiment of this technical solution: a positioning groove is provided in the middle of the inner sidewall of the inner sealing body, and a positioning ring is fixedly connected to the inner sidewall of the positioning groove.

[0008] As a further preferred embodiment of this technical solution: the material of the annular wave spring is stainless steel, and the wire diameter is 0.3-0.5mm.

[0009] As a further preferred embodiment of this technical solution: the positioning ring is made of PA66+glass fiber, and the inner sidewall of the positioning ring is provided with rounded corners.

[0010] As a further preferred embodiment of this technical solution: the outer wear-resistant body is made of a composite material of polytetrafluoroethylene and carbon fiber, the radial thickness of the outer wear-resistant body is 2-3mm, the number of the annular wear-resistant groove and the annular wear-resistant rib are both 3-5, and the outer wall of the annular wear-resistant rib is provided with an arc-shaped chamfer.

[0011] As a further preferred embodiment of this technical solution, the diameter of the oil storage chamber is 0.5-0.8 mm.

[0012] As a further preferred embodiment of this technical solution: the inner sealing body is made of a blend of nitrile rubber and polyurethane, and the radial thickness of the inner sealing body is 2-3 mm; the intermediate elastic buffer layer is made of hydrogenated nitrile rubber, and the radial thickness of the intermediate elastic buffer layer is 0.8-1.2 mm.

[0013] Advantages of this utility model: 1. This utility model significantly improves the wear resistance of the sealing ring by setting an annular wear-resistant rib on the outer wall of the outer wear-resistant body. By concentrating the friction surface and dispersing stress through the wear-resistant material and the annular wear-resistant rib structure, the wear rate is significantly reduced. 2. By opening oil guide holes and oil storage chambers in the outer wear-resistant body, the lubricating medium can penetrate to the contact point between the annular wear-resistant rib and the sealing surface to form a lubricating film, further reducing the coefficient of friction, avoiding the problem of accelerated wear of the sealing ring due to continuous friction, and delaying the decline in sealing performance. 3. This utility model compensates for wear gaps by embedding an annular wave spring in the intermediate elastic buffer layer, avoiding the problem of increased sealing gaps and sealing failure caused by wear, maintaining long-term sealing reliability, significantly extending the overall service life of the sealing ring, and comprehensively improving the problems of rapid wear, easy failure, and high maintenance costs of the sealing ring. Attached Figure Description

[0014] 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 described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the overall axial cross-section structure of this utility model; Figure 3 This is a schematic diagram of the overall warp cross-section structure of this utility model; Figure 4 This utility model Figure 2 A magnified structural diagram of area A.

[0016] In the diagram: 1. Main component; 11. Inner sealing body; 12. Intermediate elastic buffer layer; 13. Outer wear-resistant body; 14. Annular wave spring; 15. Annular wear-resistant groove; 16. Annular wear-resistant rib; 17. Oil guide hole; 18. Oil storage cavity; 19. Positioning groove; 20. Positioning ring; 21. Rounded corner; 22. Arc-shaped chamfer. Detailed Implementation

[0017] 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.

[0018] Example Please see Figures 1-4 This utility model provides a technical solution: a wear-resistant sealing ring structure, including a main component 1, the main component 1 including an inner sealing body 11, an intermediate elastic buffer layer 12, an outer wear-resistant body 13, an annular wave spring 14, an annular wear-resistant groove 15 and an annular wear-resistant rib 16; An intermediate elastic buffer layer 12 is fixedly connected to the outer wall of the inner sealing body 11. An outer wear-resistant body 13 is fixedly connected to the outer wall of the intermediate elastic buffer layer 12. An annular wave spring 14 is provided inside the intermediate elastic buffer layer 12. The outer wall of the annular wave spring 14 is attached to the inner wall of the outer wear-resistant body 13. The inner wall of the annular wave spring 14 is attached to the outer wall of the inner sealing body 11. Multiple annular wear-resistant grooves 15 are provided on the outer wall of the outer wear-resistant body 13. Annular wear-resistant ribs 16 are fixedly connected to the inner walls of the multiple annular wear-resistant grooves 15. The outer wall of the inner sealing body 11 and the inner wall of the intermediate elastic buffer layer 12 are fixedly connected by a molding process (without gaps at the joint surface to ensure continuous sealing). The outer wall of the intermediate elastic buffer layer 12 and the inner wall of the outer wear-resistant body 13 are also fixed by molding composite (composite pressure 15-20MPa, temperature 160-180℃ to ensure interlayer bonding strength). An annular wave spring 14 is embedded circumferentially inside the intermediate elastic buffer layer 12. The outer wall of the annular wave spring 14 is tightly attached to the inner wall of the outer wear-resistant body 13, and the inner wall of the annular wave spring 14 is tightly attached to the outer wall of the inner sealing body 11. The axial length of the annular wave spring 14 is consistent with the axial thickness of the intermediate elastic buffer layer 12 (ensuring that the annular wave spring 14 is completely wrapped by the buffer layer and has no axial protrusion). The annular wear-resistant rib 16 and the outer wear-resistant body 13 are integrally formed without splicing gaps.

[0019] In this embodiment, specifically: multiple oil guide holes 17 are evenly distributed around the outer wall of the outer wear-resistant body 13 near the two adjacent annular wear-resistant grooves 15, and multiple oil storage cavities 18 are provided inside the outer wear-resistant body 13, with the oil guide holes 17 connected to the oil storage cavities 18. The number of oil guide holes 17 is 6-8, and the oil storage cavity 18 is a cylindrical blind hole. The lubricating oil in the oil storage cavity 18 can penetrate to the surface of the outer wear-resistant body 13 and the annular wear-resistant rib 16 through the oil guide holes 17.

[0020] In this embodiment, specifically: a positioning groove 19 is provided in the middle of the inner sidewall of the inner sealing body 11, and a positioning ring 20 is fixedly connected to the inner sidewall of the positioning groove 19. The axial width of the positioning groove 19 is 1.2-1.5mm, and the radial depth is 1-1.2mm (the distance between the bottom of the groove and the outer wall of the inner sealing body 11 is ≥1mm to avoid insufficient strength of the inner sealing body 11 due to excessive groove depth); the inner wall of the positioning groove 19 is interference-fitted with the outer wall of the positioning ring 20 (interference amount 0.05-0.1mm) to achieve a fixed connection between the positioning ring 20 and the inner sealing body 11.

[0021] In this embodiment, specifically: the material of the annular wave spring 14 is 304 stainless steel, and the wire diameter is 0.3-0.5mm; The wave height (distance between the peak and trough of the waveform) of the annular wave spring 14 is 0.8-1mm, and the wave number is 5-8 waves, ensuring that the elastic force of the annular wave spring 14 is uniformly applied to the outer wear-resistant body 13. The inner diameter of the annular wave spring 14 is consistent with the outer diameter of the inner sealing body 11, and the outer diameter is consistent with the inner diameter of the outer wear-resistant body 13 (ensuring the contact area between the annular wave spring 14 and the inner and outer layers).

[0022] In this embodiment, specifically: the positioning ring 20 is made of PA66+glass fiber, and the inner sidewall of the positioning ring 20 is provided with a rounded corner portion 21; The axial width of the positioning ring 20 is consistent with the axial width of the positioning groove 19. The inner wall of the positioning ring 20 is provided with a rounded corner 21 along its circumference. The radius of the rounded corner 21 is 0.3-0.6mm to prevent the inner wall of the positioning ring 20 from scratching the equipment sealing groove or shaft surface during installation.

[0023] In this embodiment, specifically: the outer wear-resistant body 13 is made of a composite material of polytetrafluoroethylene and carbon fiber, the radial thickness of the outer wear-resistant body 13 is 2-3mm, the number of annular wear-resistant grooves 15 and annular wear-resistant ribs 16 is 3-5, and the outer side wall of the annular wear-resistant ribs 16 is provided with an arc-shaped chamfer 22. The radius of the arc-shaped chamfer 22 is 0.2-0.3mm. The arc-shaped chamfer 22 reduces the stress concentration when the annular wear-resistant rib 16 contacts the sealing surface, thus preventing the annular wear-resistant rib 16 from breaking or aggravating wear.

[0024] In this embodiment, specifically: the diameter of the oil storage cavity 18 is 0.5-0.8 mm; The depth of the oil reservoir 18 shall not exceed 1 / 2 of the radial and axial thickness of the outer wear-resistant body 13, so as to avoid the decrease in strength of the outer wear-resistant body 13 due to the opening of the oil reservoir 18.

[0025] In this embodiment, specifically: the inner sealing body 11 is a blend of nitrile rubber and polyurethane, wherein the polyurethane accounts for 25%-35% by mass, taking into account the oil resistance of nitrile rubber and the wear resistance and elasticity of polyurethane; the radial thickness of the inner sealing body 11 is 2-3mm; the intermediate elastic buffer layer 12 is made of hydrogenated nitrile rubber with a Shore hardness of 65-75A, ensuring elastic recovery capability and being able to withstand 20%-30% compression deformation; the radial thickness of the intermediate elastic buffer layer 12 is 0.8-1.2mm, and its axial thickness is adapted to the axial thickness of the inner sealing body 11 and the outer wear-resistant body 13, ensuring that the overall axial dimension of the sealing ring is uniform.

[0026] In terms of working principle or structural principle, during use, the sealing ring is first embedded into the sealing groove of the equipment. The inner wall of the positioning ring 20 is interference-fitted with the inner wall of the sealing groove to achieve radial positioning of the sealing ring in the sealing groove, thus preventing radial displacement (uneven wear) of the sealing ring during equipment operation. The inner wall of the inner sealing body 11 is in contact with the equipment shaft or sealing surface. Under the pressure generated by the operation of the equipment, the inner sealing body 11 undergoes elastic deformation, tightly fitting the sealing surface to achieve the main sealing function and prevent media leakage. During equipment operation, the annular wear-resistant ribs 16 of the outer wear-resistant body 13 contact the outer wall of the sealing groove (or contact the other sealing surface of the equipment). Since the annular wear-resistant ribs 16 are integrally formed from carbon fiber-PTFE composite material and the ribs highly concentrate the friction surface, the wear rate of the outer wear-resistant body 13 as a whole can be greatly reduced. At the same time, the oil guide hole 17 is connected to the oil storage cavity 18 in the outer wear-resistant body 13. The lubricating medium can penetrate along the oil guide hole 17 to the contact point between the annular wear-resistant ribs 16 and the sealing surface to form a lubricating film, further reducing the coefficient of friction and reducing the wear of the ribs. When the annular wear-resistant rib 16 wears 0.3-0.8mm due to long-term use, the annular wave spring 14 in the intermediate elastic buffer layer 12 releases its elastic force. The outer wall of the annular wave spring 14 pushes the outer wear-resistant body 13 towards the sealing surface, compensating for the wear of the annular wear-resistant rib 16 and ensuring that the outer wear-resistant body 13 always remains in contact with the sealing surface, thus preventing the sealing gap from increasing (leaking risk) due to the wear of the annular wear-resistant rib 16. The elasticity of the intermediate elastic buffer layer 12 itself also assists in the reset of the outer wear-resistant body 13, while buffering the vibration generated during equipment operation (reducing damage to the sealing ring from rigid impacts). Throughout the entire process, the blended material of the inner sealing body 11 ensures the reliability and oil resistance of the main seal, the intermediate elastic buffer layer 12 and the annular wave spring 14 work together to achieve wear compensation, and the annular wear-resistant ribs 16 of the outer wear-resistant body 13, together with the lubrication structure of the oil guide hole 17 and the oil storage cavity 18, improve wear resistance and significantly extend the service life of the sealing ring.

[0027] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A wear-resistant sealing ring structure, characterized in that, It includes a main body component (1), which includes an inner sealing body (11), an intermediate elastic buffer layer (12), an outer wear-resistant body (13), an annular wave spring (14), an annular wear-resistant groove (15), and an annular wear-resistant rib (16). The outer wall of the inner sealing body (11) is fixedly connected to an intermediate elastic buffer layer (12), and the outer wall of the intermediate elastic buffer layer (12) is fixedly connected to an outer wear-resistant body (13). An annular wave spring (14) is provided inside the intermediate elastic buffer layer (12). The outer wall of the annular wave spring (14) is attached to the inner wall of the outer wear-resistant body (13), and the inner wall of the annular wave spring (14) is attached to the outer wall of the inner sealing body (11). The outer wall of the outer wear-resistant body (13) is provided with a plurality of annular wear-resistant grooves (15), and the inner walls of the plurality of annular wear-resistant grooves (15) are fixedly connected with annular wear-resistant ribs (16).

2. The wear-resistant sealing ring structure according to claim 1, characterized in that, The outer wear-resistant body (13) has multiple oil guide holes (17) evenly distributed around the outer wall near the two adjacent annular wear-resistant grooves (15). The outer wear-resistant body (13) has multiple oil storage chambers (18) inside. The oil guide holes (17) are connected to the oil storage chambers (18).

3. The wear-resistant sealing ring structure according to claim 1, characterized in that, The inner sealing body (11) has a positioning groove (19) in the middle of its inner sidewall, and a positioning ring (20) is fixedly connected to the inner sidewall of the positioning groove (19).

4. The wear-resistant sealing ring structure according to claim 1, characterized in that, The annular wave spring (14) is made of stainless steel with a wire diameter of 0.3-0.5 mm.

5. The wear-resistant sealing ring structure according to claim 3, characterized in that, The inner wall of the positioning ring (20) is provided with a rounded corner (21).

6. The wear-resistant sealing ring structure according to claim 1, characterized in that, The outer wear-resistant body (13) has a radial thickness of 2-3 mm. The number of the annular wear-resistant groove (15) and the annular wear-resistant rib (16) are both 3-5. The outer side wall of the annular wear-resistant rib (16) is provided with an arc-shaped chamfer (22).

7. The wear-resistant sealing ring structure according to claim 2, characterized in that, The diameter of the oil storage chamber (18) is 0.5-0.8 mm.

8. The wear-resistant sealing ring structure according to claim 1, characterized in that, The radial thickness of the inner sealing body (11) is 2-3 mm; the intermediate elastic buffer layer (12) is made of hydrogenated nitrile rubber, and the radial thickness of the intermediate elastic buffer layer (12) is 0.8-1.2 mm.

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