Exhaust pipe gasket and engine

Abstract

The utility model provides an exhaust pipe gasket and an engine, and belongs to the technical field of engine exhaust pipe sealing. The exhaust pipe gasket comprises a gasket body, the gasket body comprises a first sealing face and a second sealing face, and at least two sealing parts are formed on at least one of the first sealing face and the second sealing face. The exhaust pipe gasket provided by the utility model is provided with a multi-sealing structure and has a multi-sealing effect, and the risk of gas leakage is effectively reduced.

Description

Technical Field

[0001] This application belongs to the technical field of engine exhaust pipe sealing, and particularly relates to an exhaust pipe gasket and an engine. Background Art

[0002] Exhaust pipe gaskets are widely used in the field of engines. They are usually installed between the exhaust manifold of the engine and the exhaust pipe. The exhaust manifold is the place where the engine exhaust gas first leaves the cylinder head and enters the exhaust system. The exhaust pipe gasket can play a crucial role in ensuring that the high-temperature and high-pressure exhaust gas does not leak from this interface.

[0003] In related technologies, most exhaust pipe gaskets are of a single-seal structure. Due to the harsh service environment of the exhaust pipe gasket, there are negative impacts such as high temperature, high-low temperature shock, large deformation of the sealing system components, and deterioration of the sealing force. After long-term use, the single-seal structure of the exhaust pipe gasket is prone to failure and air leakage problems. Utility Model Content

[0004] To solve at least one aspect of the technical problems in the background art, this application provides an exhaust pipe gasket with a multi-seal structure, having a multi-seal effect and effectively reducing the risk of gas leakage.

[0005] The second aspect of the embodiments of this application provides an engine.

[0006] The technical solution adopted by this application is as follows:

[0007] The first aspect of the embodiments of this application provides an exhaust pipe gasket, including:

[0008] A gasket body, the gasket body includes a first sealing surface and a second sealing surface, and at least two sealing parts are formed on at least one of the first sealing surface and the second sealing surface.

[0009] According to the exhaust pipe gasket provided by the first aspect embodiment of the present application, at least two layers of sealing parts can be formed on the first sealing surface, at least two layers of sealing parts can also be formed on the second sealing surface, and at least two layers of sealing parts can be formed on both the first sealing surface and the second sealing surface at the same time. By setting at least two layers of sealing parts, even if one layer of sealing fails due to reasons such as aging, high temperature, and material creep, the other layer of sealing can still maintain the sealing function, significantly improving the sealing reliability and durability. In harsh environments such as high temperature, high and low temperature shock, and large deformation of the sealing system components, the multi-layer sealing structure can better resist the influence of environmental factors and reduce the air leakage problem caused by the deterioration of the sealing force. Compared with the traditional single sealing structure, the multi-layer sealing structure can more effectively disperse and relieve the sealing pressure, reduce the wave height deterioration of the exhaust pipe gasket, and thus extend the overall service life of the exhaust pipe gasket. In addition, due to the enhanced stability and durability of the exhaust pipe gasket sealing structure, the frequency of replacing the exhaust pipe gasket is reduced, thereby reducing the cost and inconvenience of engine maintenance. In summary, the exhaust pipe gasket provided by the embodiment of the present application significantly improves the sealing performance, enhances the reliability and safety of the product through its unique multi-layer sealing design, while reducing the maintenance cost, improving the engine efficiency and the overall performance of the vehicle.

[0010] According to an embodiment of the present application, the sealing part is a slope structure and / or an arc surface structure formed on the first sealing surface and the second sealing surface.

[0011] According to an embodiment of the present application, a first slope, a first transition surface, and a second slope are sequentially connected on the first sealing surface, and the first transition surface is higher than the first sealing surface.

[0012] According to an embodiment of the present application, a third slope, a second transition surface, a fourth slope, a third transition surface, and a fifth slope are sequentially connected on the second sealing surface;

[0013] The second transition surface is lower than the second sealing surface, and the third transition surface is flush with the second sealing surface.

[0014] According to an embodiment of the present application, the first slope is parallel to the third slope, the first transition surface is parallel to the second transition surface, and the second slope is parallel to the fourth slope.

[0015] According to an embodiment of the present application, the first sealing surface is parallel to the second sealing surface.

[0016] According to an embodiment of the present application, the first sealing surface is non-parallel to the second sealing surface.

[0017] According to an embodiment of the present application, the exhaust pipe gasket includes at least two layers of the gasket body.

[0018] According to an embodiment of the present application, an antioxidant layer is coated on at least one of the first sealing surface and the second sealing surface.

[0019] An embodiment of the second aspect of the present application provides an engine, including the exhaust pipe gasket in any one of the embodiments of the first aspect as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments and descriptions thereof of the present application are used to explain the present application and do not constitute an improper limitation of the present application. In the drawings:

[0021] Figure 1 is a schematic structural diagram of the exhaust pipe gasket provided by the embodiment of the present application.

[0022] Wherein,

[0023] 11. Gasket body; 12. First sealing surface; 13. Second sealing surface; 14. Sealing portion; 15. First slope; 16. First transition surface; 17. Second slope; 18. Third slope; 19. Second transition surface; 20. Fourth slope; 21. Third transition surface; 22. Fifth slope. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] In order to more clearly illustrate the overall concept of the present application, the following will be described in detail by way of examples in conjunction with the drawings of the specification.

[0025] Many specific details are set forth in the following description in order to provide a thorough understanding of the present application. However, the present application may be implemented in other ways different from those described herein. Therefore, the protection scope of the present application is not limited by the specific embodiments disclosed below. It should be noted that, without conflict, the embodiments of the present application and the features in each embodiment may be combined with each other.

[0026] In addition, in the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present application.

[0027] In this application, unless otherwise clearly defined or limited, terms such as "installed", "connected", "linked", "fixed", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, or a communication connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0028] In this application, unless otherwise clearly defined or limited, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0029] As Figure 1 shown, an exhaust pipe gasket provided by an embodiment of the first aspect of this application includes a gasket body 11, the gasket body 11 includes a first sealing surface 12 and a second sealing surface 13, and at least two layers of sealing portions 14 are formed on at least one of the first sealing surface 12 and the second sealing surface 13.

[0030] The first sealing surface 12 and the second sealing surface 13 are two planes where the exhaust pipe gasket contacts two components to be connected (such as an exhaust pipe and an engine exhaust manifold), and the sealing portion 14 is usually in a groove shape or a convex shape. These grooves or protrusions can be continuous or discontinuous, and the depth, width, and shape can vary according to specific application scenarios and sealing requirements.

[0031] The material of the exhaust pipe gasket body 11 needs to be able to withstand high temperature, corrosion, and mechanical stress. Common materials include stainless steel, nickel-based alloys, or metals with special coatings to enhance their heat resistance and corrosion resistance.

[0032] When the exhaust pipe gasket is compressed between two surfaces, the first layer of sealing portion 14 takes effect first, but with the change of time and temperature, even if the first layer of sealing portion 14 begins to deteriorate, the second layer of sealing portion 14 can still maintain the sealing performance, thereby forming redundant sealing protection.

[0033] According to the exhaust pipe gasket provided by the first aspect embodiment of the present application, at least two layers of sealing portions 14 can be formed on the first sealing surface 12, or at least two layers of sealing portions 14 can be formed on the second sealing surface 13, or at least two layers of sealing portions 14 can be formed on both the first sealing surface 12 and the second sealing surface 13. By providing at least two layers of sealing portions 14, even if one layer of sealing fails due to reasons such as aging, high temperature, and material creep, the other layer of sealing can still maintain the sealing function, significantly improving the sealing reliability and durability. In harsh environments such as high temperature, high and low temperature shock, and large deformation of sealing system components, the multi-layer sealing structure can better resist the influence of environmental factors and reduce the air leakage problem caused by the deterioration of sealing force. Compared with the traditional single-sealing structure, the multi-layer sealing structure can more effectively disperse and relieve the sealing pressure, reduce the wave height deterioration of the exhaust pipe gasket, and thus extend the overall service life of the exhaust pipe gasket. In addition, due to the enhanced stability and durability of the exhaust pipe gasket sealing structure, the frequency of replacing the exhaust pipe gasket is reduced, thereby reducing the cost and inconvenience of engine maintenance. In summary, the exhaust pipe gasket provided by the embodiment of the present application significantly improves the sealing performance, enhances the reliability and safety of the product, reduces the maintenance cost, and improves the engine efficiency and the overall performance of the vehicle through its unique multi-layer sealing design.

[0034] In some embodiments of the present application, the sealing portion 14 is a slope structure and / or an arc surface structure formed on the first sealing surface 12 and the second sealing surface 13. The slope structure and the arc surface structure can increase the contact area, so that under the same pressure, the friction force between the sealing portion 14 and the contact surface is greater, thereby improving the tightness and reliability of the seal. Under high temperature and pressure changes, engine components and the exhaust pipe may undergo slight deformation. The slope and arc surface structures can better adapt to this deformation, maintain a good sealing state, and prevent gas leakage. This geometric structure helps to distribute the compression force more evenly on the contact surface, reduce local stress concentration, thereby reducing material fatigue and extending the gasket life. The slope and arc surface structures can enable the gasket to self-adjust to the optimal sealing position during the installation process, and ensure good sealing performance even within the manufacturing tolerance range.

[0035] Furthermore, the slope structure or the arc surface structure can appear alone on the same sealing surface, or the slope structure and the arc surface structure can appear on the same sealing surface at the same time.

[0036] Such as Figure 1As shown, in some embodiments of the present application, a first slope surface 15, a first transition surface 16, and a second slope surface 17 are sequentially formed on the first sealing surface 12, and the first transition surface 16 is higher than the first sealing surface 12. The first slope surface 15 and the second slope surface 17 together constitute a part of the multi-layer sealing structure. They play sealing roles under different pressure and displacement conditions respectively, ensuring sufficient sealing effect at different stages. Even if one of the slope surfaces wears after long-term use, the other slope surface can still continue to provide sealing. The first transition surface 16, the first slope surface 15, and the second slope surface 17 are formed as a convex structure on the first sealing surface 12, and the first transition surface 16 is higher than the first sealing surface 12. When the exhaust pipe gasket is not under pressure, the first transition surface 16 does not directly contact the mating part; when external pressure is applied, the first transition surface 16 first contacts and starts to compress, providing a pre-tightening force for the entire sealing process, which helps to form a preliminary seal at a low pressure state. The engine and the exhaust system will experience thermal expansion and contraction during operation. The height design of the first transition surface 16 can adapt to this deformation and maintain the sealing performance. The design of the first transition surface 16 can also help to improve the heat conduction path and reduce local hot spots.

[0037] As Figure 1 shown, in some embodiments of the present application, a third slope surface 18, a second transition surface 19, a fourth slope surface 20, a third transition surface 21, and a fifth slope surface 22 are sequentially formed on the second sealing surface 13; the second transition surface 19 is lower than the second sealing surface 13, and the third transition surface 21 is flush with the second sealing surface 13. The settings of the third slope surface 18, the fourth slope surface 20, and the fifth slope surface 22 enable the second sealing surface 13 to have a multi-layer sealing effect, greatly improving the reliability of the seal. The second transition surface 19 is lower than the second sealing surface 13. In the initial state, the second transition surface 19 does not directly participate in the sealing, but when the exhaust pipe gasket is compressed, the second transition surface 19 will gradually contact the opposite surface, forming an additional sealing effect, which helps to provide an additional sealing force under uneven pressure conditions and can also adapt to the dimensional changes caused by thermal expansion and contraction. The third transition surface 21 is flush with the second sealing surface 13, ensuring that the third transition surface 21 can maintain close contact with the opposite surface without additional pressure, forming a basic sealing layer. When pressure is applied, the third transition surface 21 can smoothly transition to the fourth slope surface 20 and the fifth slope surface 22, avoiding sudden pressure changes and making the seal more stable.

[0038] As Figure 1As shown, in some embodiments of the present application, the first slope surface 15 is parallel to the third slope surface 18, the first transition surface 16 is parallel to the second transition surface 19, and the second slope surface 17 is parallel to the fourth slope surface 20. The parallel slope surfaces and transition surfaces ensure that when the exhaust pipe gasket is compressed, the pressure can be evenly distributed along the parallel direction, avoiding excessive local stress concentration, thereby reducing material fatigue and damage and extending the service life of the gasket.

[0039] As Figure 1 shown, in some embodiments of the present application, the first sealing surface 12 is parallel to the second sealing surface 13. The parallel design of the first sealing surface 12 and the second sealing surface 13 makes it easier to align the exhaust pipe gasket during installation, ensuring the correct fit of the sealing surface with the contact member without excessive adjustment, thus simplifying the assembly process and reducing the assembly difficulty and error rate.

[0040] In some embodiments of the present application, the first sealing surface 12 is non-parallel to the second sealing surface 13. In some cases, the surfaces of the exhaust pipe or the connecting member may not be completely flat or parallel, and the non-parallel sealing surface design can better adapt to this irregularity, ensuring good sealing effect at all contact points.

[0041] In some embodiments of the present application, the exhaust pipe gasket includes at least two layers of gasket bodies 11. The multiple layers of gasket bodies 11 can provide multiple sealing effects. Even if the performance of a certain layer deteriorates after long-term use, the other layers can still maintain the seal, thus significantly improving the overall sealing reliability and durability. The multi-layer gasket can optimize the heat conduction path through the combination of different materials, help absorb and disperse the heat from the engine, reduce local overheating, and protect the sealing surface from thermal damage. By using gasket bodies 11 of different materials, a corrosion-resistant barrier can be constructed, especially in high-temperature and corrosive gas environments, to extend the service life of the exhaust pipe gasket.

[0042] In some embodiments of the present application, an antioxidant layer is coated on at least one of the first sealing surface 12 and the second sealing surface 13. The exhaust pipe gasket is usually in an environment of high temperature, high pressure and corrosive gas. The antioxidant layer can effectively prevent the metal surface from being oxidized, reduce corrosion, and extend the service life of the gasket. The antioxidant layer has good thermal stability, can withstand high-temperature environments, helps the gasket maintain its physical and chemical properties at high temperatures, and reduces thermal deformation.

[0043] Furthermore, there are various types of antioxidant layers. For metal coatings such as nickel, chromium or molybdenum, the thickness is between 5 and 20 microns; for oxide coatings such as alumina or zirconia, the thickness is between 10 and 50 microns; for ceramic coatings such as silicon nitride or silicon carbide, the thickness is between 20 and 100 microns.

[0044] The second aspect of the present application provides an engine, including the exhaust pipe gasket in any of the embodiments of the first aspect above.

[0045] The engine can be a diesel engine, a gasoline engine, etc. The exhaust pipe gasket is installed between the exhaust manifold and the exhaust pipe of the engine.

[0046] For the engine provided by the second aspect of the present application, an exhaust pipe gasket is provided, and the sealing performance is good. Specifically, the exhaust pipe gasket is a multi-sealing structure, and at least two sealing parts 14 can be formed on the first sealing surface 12, or at least two sealing parts 14 can be formed on the second sealing surface 13, or at least two sealing parts 14 can be formed on both the first sealing surface 12 and the second sealing surface 13 at the same time. By providing at least two sealing parts 14, even if one of the seals fails due to aging, high temperature, material creep, etc., the other seal can still maintain the sealing function, significantly improving the sealing reliability and durability. In harsh environments such as high temperature, high and low temperature shock, and large deformation of the components of the sealing system, the multi-sealing structure can better resist the influence of environmental factors and reduce the air leakage problem caused by the deterioration of the sealing force. Compared with the traditional single-sealing structure, the multi-sealing structure can more effectively disperse and relieve the sealing pressure, reduce the wave height deterioration of the exhaust pipe gasket, and thus extend the overall service life of the exhaust pipe gasket. In addition, due to the enhanced stability and durability of the sealing structure of the exhaust pipe gasket, the frequency of replacing the exhaust pipe gasket is reduced, thereby reducing the cost and inconvenience of engine maintenance.

[0047] What is not described in the present application can be realized by adopting or referring to the existing technology.

[0048] Each embodiment in this specification is described in a progressive manner. The same or similar parts among the embodiments can be referred to each other, and the focus of each embodiment is to illustrate the differences from other embodiments.

[0049] The above are only the embodiments of the present application and are not used to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the scope of the claims of the present application.

Claims

1. An exhaust pipe gasket, characterized in that, Comprising: A gasket body (11), the gasket body (11) comprising a first sealing surface (12) and a second sealing surface (13), and at least two sealing portions (14) being formed on at least one of the first sealing surface (12) and the second sealing surface (13).

2. The exhaust pipe gasket according to claim 1, characterized in that, The sealing portion (14) is a slope structure and / or an arc surface structure formed on the first sealing surface (12) and the second sealing surface (13).

3. The exhaust pipe gasket according to claim 2, characterized in that, A first slope (15), a first transition surface (16) and a second slope (17) are sequentially formed on the first sealing surface (12), and the first transition surface (16) is higher than the first sealing surface (12).

4. The exhaust pipe gasket according to claim 3, characterized in that, A third slope (18), a second transition surface (19), a fourth slope (20), a third transition surface (21) and a fifth slope (22) are sequentially formed on the second sealing surface (13); The second transition surface (19) is lower than the second sealing surface (13), and the third transition surface (21) is flush with the second sealing surface (13).

5. The exhaust pipe gasket according to claim 4, characterized in that, The first slope (15) is parallel to the third slope (18), the first transition surface (16) is parallel to the second transition surface (19), and the second slope (17) is parallel to the fourth slope (20).

6. The exhaust pipe gasket according to any one of claims 1 to 5, characterized in that The first sealing surface (12) is parallel to the second sealing surface (13).

7. The exhaust pipe gasket according to any one of claims 1 to 5, characterized in that, The first sealing surface (12) is non-parallel to the second sealing surface (13).

8. The exhaust pipe gasket according to any one of claims 1 to 5, characterized in that, The exhaust pipe gasket comprises at least two layers of the gasket body (11).

9. The exhaust pipe gasket according to any one of claims 1 to 5, characterized in that, An antioxidant layer is coated on at least one of the first sealing surface (12) and the second sealing surface (13).

10. An engine, characterized in that, Comprising the exhaust pipe gasket according to any one of claims 1 to 9.

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