Lip seal

Abstract

This utility model discloses a generally annular lip seal ring, comprising a first fitting portion and a second fitting portion sequentially arranged in the thickness direction. A first fitting surface is formed on the first fitting portion, and a second fitting surface is formed on the side of the second fitting portion opposite to the first fitting portion. This second fitting surface protrudes radially outward from the first fitting surface. The seal ring of this utility model has a wider contact surface on one side, increasing the contact area with components contacting that side, thereby improving the sealing effect and significantly reducing the probability of leakage.

Description

Technical Field

[0001] This utility model belongs to the field of gasket technology, specifically relating to a lip-shaped sealing ring. Background Technology

[0002] A sealing ring is a component used to improve the airtightness between two contacting parts. Currently, the common cross-sectional shape of sealing rings is circular or elliptical. Even if they are compressed and deformed to a certain extent, their contact area is still limited, the sealing effect is generally poor, and leakage may occur.

[0003] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0004] The purpose of this invention is to provide a lip seal to solve the problem of poor sealing caused by the limited contact area between the seal and the part to be sealed.

[0005] To achieve the above objectives, a specific embodiment of the present invention provides a generally annular lip seal ring, which includes a first fitting portion and a second fitting portion arranged sequentially in the thickness direction. A first fitting surface is formed on the first fitting portion, and a second fitting surface is formed on the side of the second fitting portion opposite to the first fitting portion. The second fitting surface protrudes radially outward from the first fitting surface.

[0006] In one or more embodiments of the present invention, the second mating portion includes a main body portion and an outer lip extending radially outward along the lip-shaped sealing ring, wherein the outer lip and the surface of the main body portion constitute the second mating surface.

[0007] In one or more embodiments of this utility model, the outer lip extends radially outward along the lip-shaped sealing ring while extending in a direction away from the first mating portion.

[0008] In one or more embodiments of the present invention, the second mating surface includes an arcuate surface formed on the outer lip and a plane on the main body connecting the arcuate surface.

[0009] In one or more embodiments of this utility model, the thickness of the outer lip gradually decreases along the outward extending direction.

[0010] In one or more embodiments of the present invention, the second fitting portion further includes an inner lip edge that connects to the main body portion and extends radially inward along the lip-shaped sealing ring.

[0011] In one or more embodiments of the present invention, the first fitting part and the outer lip are connected by an arc-shaped surface, and / or the included angle between the first fitting part and the inner lip is an obtuse angle.

[0012] In one or more embodiments of this utility model, the first bonding surface is provided with a concave ring along the circumference of the first bonding portion.

[0013] In one or more embodiments of this utility model, the cross-section of the concave ring is semi-circular.

[0014] In one or more embodiments of the present invention, the width of the first bonding portion gradually decreases along the direction toward the second bonding portion.

[0015] Compared with the prior art, the sealing ring of this invention has a wider contact surface on one side, which increases the contact area with the component that contacts that side, thereby improving the sealing effect and greatly reducing the probability of leakage. Attached Figure Description

[0016] 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 recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of a lip-shaped sealing ring in one embodiment of the present invention;

[0018] Figure 2 This is a cross-sectional view of a lip seal ring in one embodiment of the present invention;

[0019] Figure 3 This is a partial schematic diagram of the lip-shaped sealing ring in one embodiment of the present invention.

[0020] Explanation of key figure labels:

[0021] 100-Lip seal ring, 10-First mating part, 11-First mating surface, 12-Concave ring, 20-Second mating part, 21-Second mating surface, 211-Arc-shaped surface, 212-Flat surface, 22-Outer lip, 23-Inner lip, 24-Main body. Detailed Implementation

[0022] To enable those skilled in the art to better understand the technical solutions in this disclosure, the technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this disclosure.

[0023] like Figure 1-3 As shown, in one embodiment of the present invention, the lip seal 100 is generally annular in shape. The lip seal 100 includes a first fitting portion 10 and a second fitting portion 20 disposed along the thickness direction of the lip seal 100. A first fitting surface 11 is formed on the first fitting portion 10. The second fitting portion 20 extends along the thickness direction of the lip seal 100 on one side of the first fitting portion 10. The side of the second fitting portion 20 facing away from the first fitting portion 10 is a second fitting surface 21, and the width of the second fitting surface 21 is greater than the width of the first fitting surface 11, that is, the second fitting surface 21 protrudes radially outward more than the first fitting surface 11, forming a lip. When the lip seal 100 is pressed between two components for sealing, the first fitting surface 11 and the second fitting surface 21 are respectively used to fit onto the two components.

[0024] In this embodiment, the lip seal 100 adopts an irregular shape design on both sides in the thickness direction. One side has a wider contact surface, which can cover more of the contact area of ​​the parts that contact that side, thereby improving the sealing effect and greatly reducing the probability of leakage.

[0025] Specifically, the second mating portion 20 includes a main body portion 24 and an outer lip 22 extending radially outward along the lip-shaped sealing ring 100. The outer lip 22 and the surface of the main body portion 24 together form the second mating surface 21. Figure 2 As shown, the outer lip 22 increases the width of the second mating surface 21, expanding the contact area with the contacting component, thereby improving the sealing effect and reducing the probability of leakage.

[0026] Preferably, the outer lip 22 extends outward while also extending in a direction away from the first contact portion 10, therefore the second contact surface 21 is not flat but has a height difference. With this arrangement, when the second contact portion 20 contacts the component on its side, the distal end of the outer lip 21 and the main body of the second contact portion 20 successively abut against the component. Due to the height difference, a gap exists between the second contact surface 21 and the component. During subsequent compression, the air in the gap between the second contact surface 21 and the component surface is squeezed out, and the second contact portion 20 adheres to the surface of the component on its side. By adhering to the surface of one side of the component, the airtightness of the lip seal 100 is further improved, while reducing the probability of accidental loss of the lip seal 100 during component assembly and disassembly.

[0027] In such Figure 2 In the illustrated embodiment, the second bonding surface 21 includes an arcuate surface 211 formed on the outer lip 22 and a flat surface 212 on the main body 24. The arcuate surface 211 and the flat surface 212 enable the second bonding surface 21 to completely adhere to the surface of the component on the side where it is located when the second bonding portion 20 deforms under pressure, without creating gaps, thereby further improving the adhesion effect and airtightness.

[0028] In one embodiment, the thickness of the outer lip 22 gradually decreases along the outward extension direction. The gradually decreasing thickness makes the outer lip 22 more easily deformable, thereby making it easier to attach to the component.

[0029] Preferably, the second mating portion 20 further includes an inner lip 23 that connects to the main body portion 24 and extends radially inward along the lip seal ring 100. The inner lip 23 further increases the width of the second mating surface 21, thereby further improving the airtightness effect.

[0030] like Figure 2 As shown, to facilitate the smooth deformation of the outer lip 22 without pulling on the first fitting portion 10, the first fitting portion 10 and the outer lip 22 are connected by an arc-shaped surface. The inner lip 23 is not easily deformed, so the angle between it and the first fitting portion 10 is an obtuse angle.

[0031] In one embodiment, a concave ring 12 is provided on the first mating surface 11, and the concave ring 12 is arranged circumferentially along the first mating surface 11. After the concave ring 12 is provided, the first mating portion 10 can deform, and the two sides of the concave ring 12 can extend to both sides respectively, thereby increasing the contact area between the first mating portion 10 and the side component, and further improving the overall airtightness of the lip seal ring 100.

[0032] Preferably, the cross-section of the concave ring 12 is semi-circular. Of course, the cross-section of the concave ring 12 can also be set to other shapes, and this embodiment is not limited thereto.

[0033] In one embodiment, the width of the first fitting portion 10 gradually decreases in the direction toward the second fitting portion 20. Similarly, the overall width of the second fitting portion 20 gradually decreases in the direction toward the first fitting portion 10. Therefore, the overall cross-sectional shape of the lip seal ring 100 is approximately hourglass-shaped, with larger ends and a smaller middle. This results in less pulling on the first fitting portion 10 and the second fitting portion 20, making them more prone to deformation.

[0034] It will be apparent to those skilled in the art that this disclosure is not limited to the details of the exemplary embodiments described above, and that this disclosure can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of this disclosure is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this disclosure. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0035] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A lip-shaped sealing ring, generally annular in shape, characterized in that, The lip seal includes the following components arranged sequentially in its thickness direction: A first bonding portion, wherein a first bonding surface is formed on the first bonding portion; The second bonding portion has a second bonding surface formed on the side opposite to the first bonding portion, and the second bonding surface protrudes radially outward from the first bonding surface.

2. The lip seal ring according to claim 1, characterized in that, The second mating portion includes a main body portion and an outer lip extending radially outward along the lip-shaped sealing ring, wherein the outer lip and the surface of the main body portion constitute the second mating surface.

3. The lip seal ring according to claim 2, characterized in that, The outer lip extends radially outward along the lip-shaped sealing ring while also extending in a direction away from the first mating part.

4. The lip seal ring according to claim 3, characterized in that, The second bonding surface includes an arcuate surface formed on the outer lip and a plane on the main body that connects to the arcuate surface.

5. The lip seal ring according to claim 4, characterized in that, The thickness of the outer lip gradually decreases along the outward direction.

6. The lip seal ring according to claim 2, characterized in that, The second fitting portion also includes an inner lip that connects to the main body and extends radially inward along the lip seal ring.

7. The lip seal ring according to claim 6, characterized in that, The first fitting portion and the outer lip are connected by an arc-shaped surface, and / or The angle between the first fitting part and the inner lip edge is an obtuse angle.

8. The lip seal ring according to claim 1, characterized in that, The first bonding surface has a concave ring along the circumference of the first bonding portion.

9. The lip seal ring according to claim 8, characterized in that, The concave ring has a semi-circular cross-section.

10. The lip seal ring according to claim 1, characterized in that, The width of the first bonding portion gradually decreases in the direction toward the second bonding portion.

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