A sealing ring for axial bidirectional sealing

Abstract

This utility model relates to an axial bidirectional sealing ring, comprising an inner ring and an outer ring that are coaxial and nested together, and a rubber ring. The inner ring includes an inner upper ring and an inner lower ring, and the outer ring includes an outer upper ring and an outer lower ring. The lower surface of the inner upper ring, the outer wall surface of the inner lower ring, the inner wall surface of the outer upper ring, and the upper surface of the outer lower ring together form a sealing cavity for accommodating the rubber ring. During assembly, the inner and outer sides of the sealing ring are squeezed by the inner and outer rings respectively, causing the first sealing inclined surface to fit with the third sealing inclined surface, and the second sealing inclined surface to fit with the fourth sealing inclined surface. Two independent sealing barriers with opposite directions are formed between the upper and lower ends of the rubber ring, effectively preventing the medium from communicating or leaking in the vertical direction of the sealing cavity, thus achieving axial bidirectional sealing.

Description

Technical Field

[0001] This utility model relates to the field of sealing equipment technology, specifically to a sealing ring for axial bidirectional sealing. Background Technology

[0002] In mechanical seals, the dynamic sealing between shaft and tubular components has long faced challenges from high pressure, bidirectional media crossflow, and vibration. Traditional O-rings rely on a single compression surface for sealing, making them prone to extrusion failure under high pressure. While lip seals can withstand pressure in one direction, reverse pressure can easily cause the sealing lip to flip and become unstable. This results in existing seals being susceptible to bidirectional media crossflow in the axial direction during use, and their sealing reliability is insufficient under vibration or pressure fluctuations. Utility Model Content

[0003] In view of the shortcomings of the prior art, this utility model provides a sealing ring for axial bidirectional sealing, so as to solve the above-mentioned problems existing in the prior art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A sealing ring for axial bidirectional sealing includes an inner ring and an outer ring that are coaxial and nested together, and a rubber ring disposed between the inner ring and the outer ring. The inner ring includes an upper inner ring located above and an inner lower ring connected below the upper inner ring. The outer ring includes an upper outer ring located above and an lower outer ring connected below the upper outer ring. The outer diameter of the upper inner ring is larger than that of the lower inner ring, and the inner diameter of the upper outer ring is larger than that of the lower outer ring. The lower surface of the upper inner ring, the outer wall surface of the lower inner ring, the inner wall surface of the upper outer ring, and the upper surface of the lower outer ring together form a sealing cavity for accommodating the rubber ring. The upper surface of the rubber ring facing the inner ring and the lower surface facing the outer ring are respectively provided with a first sealing slope and a second sealing slope. The inner side of the lower surface of the upper inner ring is provided with a third sealing slope, and the inner side of the upper surface of the lower outer ring is provided with a fourth sealing slope. During assembly, the inner and outer sides of the sealing ring are squeezed by the inner ring and the outer ring respectively, causing the first sealing slope to fit with the third sealing slope and the second sealing slope to fit with the fourth sealing slope.

[0006] Furthermore, the first sealing slope is parallel to the second sealing slope, the third sealing slope is parallel to the fourth sealing slope, and the inclination angle of the first sealing slope relative to the horizontal plane is smaller than that of the third sealing slope.

[0007] Furthermore, the outer wall of the lower inner ring protrudes outward to form an inner embedded ring, and the inner wall of the upper outer ring protrudes inward to form an outer embedded ring. The inner and outer sidewalls of the rubber ring are respectively provided with a first groove and a second groove. The inner embedded ring is fitted into the first groove, and the outer embedded ring is fitted into the second groove.

[0008] Furthermore, the outer wall surface of the rubber ring is spaced apart from the inner wall of the upper outer ring, forming a first oil storage cavity between the rubber ring and the outer ring; the inner wall surface of the rubber ring is spaced apart from the outer wall of the lower inner ring, forming a second oil storage cavity between the rubber ring and the inner ring.

[0009] Furthermore, the outer circumferential side of the inner upper ring is provided with a first alignment groove, the inner wall of the outer lower ring is provided with a second alignment groove, the upper end of the outer upper ring protrudes inward to form a first alignment protrusion, the lower end of the inner lower ring protrudes outward to form a second alignment protrusion, the first alignment protrusion is embedded in the first alignment groove, and the second alignment protrusion is embedded in the second alignment groove.

[0010] This utility model provides a sealing ring for axial bidirectional sealing. It has the following beneficial effects:

[0011] The tight fit between the first and third sealing bevels, and between the second and fourth sealing bevels, creates two independent, oppositely oriented sealing barriers between the upper and lower ends of the rubber ring. This effectively prevents the medium from communicating or leaking between the two sides in the vertical (axial) direction within the sealing cavity, achieving a bidirectional axial seal. During assembly, the compression applied by the inner and outer rings to the rubber ring not only ensures initial contact of the four sealing bevels but, more importantly, creates pre-compression. When the system experiences mechanical vibration, the pressure further pushes the rubber ring, causing the first sealing bevel to press more tightly against the third sealing bevel, and / or the second sealing bevel to press more tightly against the fourth sealing bevel, creating a self-tightening effect that significantly improves the reliability and pressure resistance of the seal. Attached Figure Description

[0012] Figure 1 This is an exploded view of the structure of this utility model;

[0013] Figure 2 This is a partial cross-sectional view of the present invention.

[0014] Figure 3 for Figure 2 A magnified view of part A in the diagram.

[0015] In the diagram: 1. Inner ring; 11. Inner upper ring; 111. Third sealing bevel; 112. First alignment groove; 12. Inner lower ring; 121. Inner embedded ring; 122. Second alignment protrusion ring; 2. Outer ring; 21. Outer upper ring; 211. Outer embedded ring; 212. First alignment protrusion ring; 22. Outer lower ring; 221. Fourth sealing bevel; 222. Second alignment groove; 3. Rubber ring; 31. First sealing bevel; 32. Second sealing bevel; 33. First groove; 34. Second groove; 4. First oil reservoir; 5. Second oil reservoir; 6. Sealing cavity. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0017] See attached document Figure 1-3 A sealing ring for axial bidirectional sealing includes an inner ring 1 and an outer ring 2 that are coaxial and nested together, and a rubber ring 3 disposed between the inner ring 1 and the outer ring 2. The inner ring 1 includes an upper inner ring 11 located above and an inner lower ring 12 connected below the upper inner ring 11. The outer ring 2 includes an upper outer ring 21 located above and an lower outer ring 22 connected below the upper outer ring 21. The outer diameter of the upper inner ring 11 is larger than that of the lower inner ring 12, and the inner diameter of the upper outer ring 21 is larger than that of the lower outer ring 22. The lower surface of the upper inner ring 11 and the outer wall of the lower inner ring 12 are sealed. The inner wall of the upper outer ring 21 and the upper surface of the lower outer ring 22 together form a sealing cavity 6 to accommodate the rubber ring 3. A first sealing slope 31 and a second sealing slope 32 are respectively provided on the side of the upper surface of the rubber ring 3 facing the inner ring 1 and the side of the lower surface of the rubber ring 3 facing the outer ring 2. A third sealing slope 111 is provided on the inner side of the lower surface of the upper inner ring 11, and a fourth sealing slope 221 is provided on the inner side of the upper surface of the lower outer ring 22. The sealing ring is assembled between the shaft component and the external tubular component to form a mechanical seal. During assembly, the inner and outer sides of the sealing ring are squeezed by the inner ring 1 and the outer ring 2 respectively, causing the first sealing slope 31 to fit against the third sealing slope 111, and the second sealing slope 32 to fit against the fourth sealing slope 221.

[0018] This invention, through the tight fit between the first sealing bevel 31 and the third sealing bevel 111, and the tight fit between the second sealing bevel 32 and the fourth sealing bevel 221, forms two independent, oppositely oriented sealing barriers between the upper and lower ends of the rubber ring 3. This effectively prevents the medium from communicating or leaking in the vertical direction (i.e., axial direction) of the sealing cavity 6, achieving axial bidirectional sealing. Furthermore, during assembly, the squeezing action applied to the rubber ring 3 by the inner ring 1 and the outer ring 2 not only ensures the initial fit of the four sealing bevels but, more importantly, creates pre-compression. When the system experiences mechanical vibration, the pressure further pushes the rubber ring 3, causing the first sealing bevel 31 to press more tightly against the third sealing bevel 111, and / or the second sealing bevel 32 to press more tightly against the fourth sealing bevel 221, creating a self-tightening effect. This significantly improves the reliability and pressure-bearing capacity of the seal, especially under high-pressure conditions.

[0019] In some embodiments, the first sealing slope 31 is parallel to the second sealing slope 32, and the third sealing slope 111 is parallel to the fourth sealing slope 221. The inclination angle of the first sealing slope 31 relative to the horizontal plane is smaller than that of the third sealing slope 111. The small inclination angle design of the first sealing slope 31 makes it easier to generate radial displacement along the third sealing slope 111, efficiently converting axial pressure into radial expansion force, enhancing the sealing surface tightness, and achieving a self-tightening seal.

[0020] In some embodiments, the outer wall of the lower inner ring 12 protrudes outward to form an inner ring 121, and the inner wall of the upper outer ring 21 protrudes inward to form an outer ring 211. The inner and outer walls of the rubber ring 3 are respectively provided with a first groove 33 and a second groove 34. The inner ring 121 is fitted into the first groove 33, and the outer ring 211 is fitted into the second groove 34. This allows the inner and outer sides of the rubber ring 3 to form a precise fit with the inner ring 1 and the outer ring 2, respectively, eliminating the risk of radial misalignment between the rubber ring 3 and the inner and outer rings 1 and 2, and preventing the rubber ring 3 from axially shifting under pressure or vibration, ensuring that the sealing slope is always aligned. The rubber ring 3 directly bears the radial extrusion force of the inner ring 121 and the outer ring 211, making the deformation force act more evenly on the sealing slope.

[0021] In some embodiments, the outer wall of the rubber ring 3 is spaced apart from the inner wall of the outer upper ring 21, forming a first oil reservoir 4 between the rubber ring 3 and the outer ring 2; the inner wall of the rubber ring 3 is spaced apart from the outer wall of the inner lower ring 12, forming a second oil reservoir 5 between the rubber ring 3 and the inner ring 1. The first oil reservoir 4 and the second oil reservoir 5 are filled with lubricating grease, which acts as a flexible damper when pressure fluctuates, reducing instantaneous pressure peaks and minimizing uneven wear of the sealing slope caused by unilateral pressure deformation of the rubber ring 3.

[0022] The inner upper ring 11 has a first alignment groove 112 formed on its outer circumference, and the outer lower ring 22 has a second alignment groove 222 formed on its inner circumference. The upper end of the outer upper ring 21 protrudes inward to form a first alignment protrusion 212, and the lower end of the inner lower ring 12 protrudes outward to form a second alignment protrusion 122. The first alignment protrusion 212 is embedded in the first alignment groove 112, and the second alignment protrusion 122 is embedded in the second alignment groove 222, so that the inner ring 1 and the outer ring 2 can be precisely positioned and assembled.

[0023] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0024] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A sealing ring for axial bidirectional sealing, comprising an inner ring and an outer ring that are coaxial and nested together, and a rubber ring disposed between the inner ring and the outer ring, characterized in that, The inner ring includes an upper inner ring at the top and an inner lower ring connected below the upper inner ring. The outer ring includes an upper outer ring at the top and an lower outer ring connected below the upper outer ring. The outer diameter of the upper inner ring is larger than that of the lower inner ring, and the inner diameter of the upper outer ring is larger than that of the lower outer ring. The lower surface of the upper inner ring, the outer wall surface of the lower inner ring, the inner wall surface of the upper outer ring, and the upper surface of the lower outer ring together form a sealing cavity for accommodating the rubber ring. The upper surface of the rubber ring facing the inner ring and the lower surface facing the outer ring are respectively provided with a first sealing slope and a second sealing slope. The inner side of the lower surface of the upper inner ring is provided with a third sealing slope, and the inner side of the upper surface of the lower outer ring is provided with a fourth sealing slope. During assembly, the inner and outer sides of the sealing ring are squeezed by the inner and outer rings respectively, causing the first sealing slope to fit with the third sealing slope and the second sealing slope to fit with the fourth sealing slope.

2. The sealing ring for axial bidirectional sealing as described in claim 1, characterized in that: The first sealing slope is parallel to the second sealing slope, and the third sealing slope is parallel to the fourth sealing slope. The inclination angle of the first sealing slope relative to the horizontal plane is smaller than that of the third sealing slope.

3. The sealing ring for axial bidirectional sealing as described in claim 1, characterized in that: The outer wall of the lower inner ring protrudes outward to form an inner ring, and the inner wall of the upper outer ring protrudes inward to form an outer ring. The inner and outer walls of the rubber ring are respectively provided with a first groove and a second groove. The inner ring is fitted into the first groove, and the outer ring is fitted into the second groove.

4. The sealing ring for axial bidirectional sealing as described in claim 1, characterized in that: The outer wall of the rubber ring is spaced apart from the inner wall of the upper outer ring, forming a first oil storage cavity between the rubber ring and the outer ring; the inner wall of the rubber ring is spaced apart from the outer wall of the lower inner ring, forming a second oil storage cavity between the rubber ring and the inner ring.

5. The sealing ring for axial bidirectional sealing as described in claim 1, characterized in that: The upper inner ring has a first alignment groove on its outer circumferential side, and the lower outer ring has a second alignment groove on its inner circumferential side. The upper end of the upper outer ring protrudes inward to form a first alignment protrusion, and the lower end of the lower inner ring protrudes outward to form a second alignment protrusion. The first alignment protrusion is embedded in the first alignment groove, and the second alignment protrusion is embedded in the second alignment groove.

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