Special-shaped sealing structure

Abstract

The utility model discloses a special-shaped sealing structure, and relates to the technical field of vehicle engineering. The sealing piece is connected between an exhaust pipe and an engine and comprises a sealing piece body. A fluid hole is formed in the center of the sealing element body and is correspondingly communicated with an exhaust hole of the exhaust pipe to form a fluid channel through which airflow passes; mounting holes for mounting exhaust pipe flange bolts are respectively formed in two sides of the sealing element body; the sealing piece body is provided with a sealing part which is at least partially arranged in a protruding mode along the periphery of the fluid hole. The sealing part comprises a first sealing part and a second sealing part; the first sealing part is close to the mounting hole, the second sealing part is far away from the mounting hole, the first sealing part is lower than the second sealing part, and the first sealing part is wider than the second sealing part.

Description

Technical Field

[0001] The utility model belongs to the technical field of vehicle engineering, and particularly relates to a special-shaped sealing structure. Background Art

[0002] With the continuous escalation of emission regulations and the increasing intensity of engine enhancements, heat loads and exhaust pressures have significantly increased, posing a severe challenge to high-temperature seals. Gaskets, as a key component of high-temperature seals, can cause gas leakage if they fail, leading to gasket and cylinder head erosion and resulting in engine power loss.

[0003] The exhaust pipe flange bolts are unevenly distributed, resulting in different deformation amounts at different parts of the exhaust pipe flange. The deformation of the exhaust pipe will cause the gasket layers to rub against each other, and the sealing force will decrease after rubbing. The more layers there are, the higher the risk, which will further lead to an increase in leakage. As the heat load and power density continue to increase, the uneven distribution of multi-layer gaskets and bolts will aggravate the risk of gasket leakage. Utility Model Content

[0004] The utility model provides a special-shaped sealing structure to solve the problem that the exhaust pipe flange bolts are unevenly distributed, resulting in different deformation amounts of the exhaust pipe flange. The deformation of the exhaust pipe will cause the gasket layers to rub against each other, and the sealing force will decrease after rubbing. The more layers there are, the higher the risk, which will further lead to an increase in leakage.

[0005] The technical solution adopted by this utility model is:

[0006] A special-shaped sealing structure is connected between an exhaust pipe and an engine, and includes a sealing body; a fluid hole is provided at the center of the sealing body, and the fluid hole is connected to the exhaust hole of the exhaust pipe to form a fluid channel for airflow; mounting holes for mounting exhaust pipe flange bolts are respectively provided on both sides of the sealing body; the sealing body has a sealing portion that is at least partially raised along the circumference of the fluid hole; the sealing portion includes a first sealing portion and a second sealing portion; the first sealing portion is close to the mounting hole, and the second sealing portion is away from the mounting hole, the height of the first sealing portion is lower than the height of the second sealing portion, and the width of the first sealing portion is greater than the width of the second sealing portion.

[0007] A special-shaped sealing structure of the utility model also has the following additional technical features:

[0008] The first sealing portion includes a first sealing segment and a second sealing segment; one side of the first sealing segment is connected to the sealing body, and the other side of the first sealing segment is connected to the second sealing segment; the height of the second sealing segment is higher than that of the first sealing segment.

[0009] The first sealing segment and the second sealing segment are planar structures, and the first sealing segment is obliquely connected to one side of the second sealing segment; or, the first sealing segment is a planar structure, and the second sealing segment is an arc surface structure; or, the first sealing segment is a planar structure, and the second sealing segment is a broken line segment structure.

[0010] The first sealing portion further includes a third sealing segment; the third sealing segment is connected to a side of the second sealing segment facing the fluid hole.

[0011] When the first sealing segment is a planar structure and the second sealing segment is an arc surface or a broken line segment structure, the third sealing segment and the first sealing segment are symmetrically arranged on both sides of the second sealing segment, and the angle between the third sealing segment and the second sealing segment is an obtuse angle.

[0012] The second sealing portion includes a first sealing transition section and a second sealing transition section; one side of the first sealing transition section is connected to the sealing element body, and the other side of the first sealing transition section is connected to the second sealing transition section; the height of the second sealing transition section is higher than the height of the first sealing transition section.

[0013] The height of the second sealing transition section is higher than that of the second sealing section, and the width of the second sealing transition section is smaller than that of the second sealing section.

[0014] The second sealing portion further includes a third sealing transition section; the third sealing transition section is connected to a side of the second sealing transition section facing the fluid hole.

[0015] A special-shaped sealing structure also includes a third sealing part; the third sealing part is arranged opposite to the first sealing part; the third sealing part includes a first sealing structure segment and a second sealing structure segment; one side of the first sealing structure segment is connected to the sealing body, and the other side of the first sealing structure segment is connected to the second sealing structure segment; the height of the second sealing structure segment is higher than the height of the first sealing structure segment.

[0016] A special-shaped sealing structure also includes a fourth sealing portion; the fourth sealing portion is arranged opposite to the second sealing portion; the fourth sealing portion includes a first sealing connection segment and a second sealing connection segment; one side of the first sealing connection segment is connected to the sealing element body, and the other side of the first sealing connection segment is connected to the second sealing connection segment; the height of the second sealing connection segment is higher than the height of the first sealing connection segment.

[0017] Due to the adoption of the above technical solution, the beneficial effects achieved by the utility model are as follows:

[0018] 1. The present application discloses a special-shaped sealing structure connected between an exhaust pipe and an engine. The exhaust pipe is connected to the engine via the sealing structure. The sealing structure includes a sealing body; a fluid hole is formed in the center of the sealing body, and the fluid hole is connected to the exhaust hole of the exhaust pipe to form a fluid channel for airflow; mounting holes for mounting exhaust pipe flange bolts are respectively formed on both sides of the sealing body; the exhaust pipe flange bolts pass through the mounting holes of the sealing body to connect the exhaust pipe to the engine. Specifically,

[0019] The seal body includes a sealing portion that is at least partially raised along the circumference of the fluid port. The sealing portion includes a first sealing portion and a second sealing portion. The first sealing portion is located proximate to the mounting hole, while the second sealing portion is located distally from the mounting hole. The first and second sealing portions have different structural designs. Since the first sealing portion is located proximate to the mounting hole, it is closer to the exhaust pipe flange bolts, which can provide a greater axial force. Therefore, the sealing force provided to the connection between the exhaust pipe and the engine needs to be increased. However, since the second sealing portion is located distally from the mounting hole, i.e., distally from the exhaust pipe flange bolts, the axial force provided by the exhaust pipe flange bolts is smaller, which requires a reduced sealing force to the connection between the exhaust pipe and the engine. Therefore, in areas subject to greater sealing force, the height of the first sealing portion is designed to be lower, while the width of the first sealing portion is designed to be wider. Therefore, the height of the first sealing portion is lower than the height of the second sealing portion, while the width of the first sealing portion is greater than the width of the second sealing portion. This achieves adaptation to different sealing forces at different locations, thereby achieving more uniform force distribution between the first and second sealing portions of the seal body and preventing deformation at different locations.

[0020] The present application sets a first sealing part and a second sealing part on the circumference of the sealing body to achieve different sealing structures on the sealing body. The width and height of the first sealing part and the second sealing part are different to adapt to the size of the sealing force at different positions to avoid deformation. The traditional method is to prevent deformation by increasing the number of gaskets, but the increase in the number of gaskets will not only lead to the risk of air leakage, but also cause the exhaust pipe flange bolts to be unable to provide sufficient axial force, thereby reducing the sealing reliability. Therefore, the present application does not need to increase the number of gaskets to increase the sealing force, can effectively improve the sealing reliability performance, enhance user experience, avoid deformation of the sealing structure caused by uneven distribution of the exhaust pipe flange bolts, further ensure that the sealing structure is subjected to uniform force, and further improve the ability of the sealing structure to resist deformation.

[0021] 2. As a preferred embodiment of the present invention, the first sealing portion includes a first sealing segment and a second sealing segment; one side of the first sealing segment is connected to the sealing body, and the other side of the first sealing segment is connected to the second sealing segment; the height of the second sealing segment is higher than the height of the first sealing segment.

[0022] By designing the first sealing part as a multi-section structure including a first sealing section and a second sealing section, the area of ​​the first sealing part can be increased, thereby increasing the sealing area and reducing the deformation area; and the second sealing section is closer to the fluid hole than the first sealing section, and is higher than the first sealing section. Compared with the first sealing section, the second sealing section is highly protruding, thereby further enhancing the sealing performance and anti-side leakage performance. The protruding second sealing section can be more tightly connected to the exhaust pipe flange, thereby reducing leakage and enhancing the sealing effect; it can also further improve safety and reliability.

[0023] 3. As a preferred embodiment of the present invention, the first sealing segment and the second sealing segment are planar structures, and the first sealing segment is obliquely connected to one side of the second sealing segment; or, the first sealing segment is a planar structure, and the second sealing segment is an arc surface structure; or, the first sealing segment is a planar structure, and the second sealing segment is a broken line segment structure.

[0024] The first sealing section and the second sealing section adopt a planar structure, which is conducive to contact and connection with the exhaust pipe flange; since the sealing body is a planar structure, the first sealing section is connected between the second sealing section and the sealing body, and the second sealing section is higher than the first sealing section, so the first sealing section is inclined to the second sealing section; in addition, the first sealing section can also adopt a planar structure and the second sealing section can adopt an arc surface structure; in addition, the first sealing section can also be a planar structure and the second sealing section can be a broken line segment structure.

[0025] 4. As a preferred embodiment of the present invention, the first sealing portion further includes a third sealing segment; the third sealing segment is connected to a side of the second sealing segment facing the fluid hole.

[0026] In order to further increase the sealing area of ​​the first sealing portion and increase the contact area between the first sealing portion and the exhaust pipe flange, the first sealing portion may also include a third sealing segment, and the third sealing segment is connected to the side of the second sealing segment facing the fluid hole. The first sealing segment, the second sealing segment and the third sealing segment fit tightly with the exhaust pipe flange to reduce leakage, enhance the sealing effect, and further improve reliability.

[0027] 5. As a preferred embodiment of the present invention, when the first sealing segment is a planar structure and the second sealing segment is an arc surface or a broken line segment structure, the third sealing segment and the first sealing segment are symmetrically arranged on both sides of the second sealing segment, and the angle between the third sealing segment and the second sealing segment is an obtuse angle.

[0028] The third sealing segment and the first sealing segment are symmetrically arranged to improve force uniformity, increase the fitting area with the exhaust pipe flange, thereby enhancing the sealing effect and preventing side leakage. The third sealing segment and the second sealing segment are arranged at an obtuse angle. Since the third sealing segment and the first sealing segment are symmetrically arranged, the first sealing segment and the second sealing segment are arranged at an obtuse angle, thereby achieving the second sealing segment protruding from the first sealing segment and the third sealing segment, so that the second sealing segment can fit tightly with the exhaust pipe flange, enhancing the sealing performance between the exhaust pipe flange, thereby improving the sealing effect of the entire sealing structure and improving reliability and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0030] Figure 1 This is an overall structural diagram of a special-shaped sealing structure according to one embodiment of the present invention;

[0031] Figure 2 This is a structural diagram of a first sealing portion in a first embodiment of a special-shaped sealing structure in one embodiment of the present utility model;

[0032] Figure 3 This is a structural diagram of a first sealing portion in a second embodiment of a special-shaped sealing structure in one embodiment of the present utility model;

[0033] Figure 4 This is a structural diagram of a first sealing portion in a third embodiment of a special-shaped sealing structure in one embodiment of the present utility model;

[0034] In the figure,

[0035] 1. Seal body; 2. First sealing part; 3. Second sealing part; 4. Third sealing part; 5. Fourth sealing part; 6. First sealing section; 7. Second sealing section; 8. Third sealing section; 9. First section; 10. Second section; 11. Third section; 12. Mounting hole; 13. Fluid hole; h - height of the second sealing section; w - width of the second sealing section. DETAILED DESCRIPTION

[0036] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0037] In addition, in the description of the present invention, it should be understood that the terms "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 cannot be understood as a limitation on the present invention.

[0038] In this utility model, unless otherwise expressly specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0039] In the present invention, unless otherwise clearly specified and limited, the first feature "above" or "below" the second feature may 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 with reference to the terms "implementation method", "embodiment", "one embodiment", "example" or "specific example" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. 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 may be combined in an appropriate manner in any one or more embodiments or examples.

[0040] In order to more clearly illustrate the overall concept of the present invention, a detailed description is given below in combination with the accompanying drawings by way of examples.

[0041] The utility model relates to a special-shaped sealing structure, such as Figure 1-4 As shown, it is connected between the exhaust pipe and the engine, and includes a sealing body 1; a fluid hole 13 is opened in the center of the sealing body 1, and the fluid hole 13 is connected with the exhaust hole of the exhaust pipe to form a fluid channel for airflow; mounting holes 12 for mounting exhaust pipe flange bolts are respectively opened on both sides of the sealing body; the sealing body 1 has a sealing portion that is at least partially raised along the circumference of the fluid hole 13; the sealing portion includes a first sealing portion 2 and a second sealing portion 3; the first sealing portion 2 is close to the mounting hole 12, and the second sealing portion 3 is far away from the mounting hole 12, the height of the first sealing portion 2 is lower than the height of the second sealing portion 3, and the width of the first sealing portion 2 is greater than the width of the second sealing portion 3.

[0042] The exhaust pipe flange bolts are connected to the engine through the mounting hole 12 of the seal body 1. Specifically, the seal body 1 has a sealing portion that is at least partially raised along the circumference of the fluid hole 13; the sealing portion includes a first sealing portion 2 and a second sealing portion 3; the first sealing portion 2 is close to the mounting hole 12, and the second sealing portion 3 is far away from the mounting hole 12. The structural designs of the first sealing portion 2 and the second sealing portion 3 are different. Since the first sealing portion 2 is close to the mounting hole 12, the first sealing portion 2 is closer to the exhaust pipe flange bolts, and the axial force that the exhaust pipe flange bolts can provide is greater, so the sealing force provided for the connection between the exhaust pipe and the engine needs to be increased; and the second sealing portion 3 is far away from the mounting hole 12, that is, the second sealing portion 3 is far away from the mounting hole 12. Exhaust pipe flange bolts, therefore the axial force that the exhaust pipe flange bolts can provide is small, and the sealing force provided for the connection between the exhaust pipe and the engine needs to be reduced. Therefore, the height of the first sealing part 2 in the area subject to greater sealing force is designed to be lower, and the width of the first sealing part 2 is designed to be wider. Therefore, the height of the first sealing part 2 is lower than the height of the second sealing part 3, and the width of the first sealing part 2 is greater than the width of the second sealing part 3, so as to adapt to different sealing forces at different positions, so as to achieve more uniform force between the first sealing part 2 and the second sealing part 3 of the seal body 1, and avoid deformation at different positions.

[0043] The present application sets a first sealing portion 2 and a second sealing portion 3 around the circumference of the seal body 1, thereby achieving different sealing structures on the seal body 1. The width and height of the first sealing portion 2 and the second sealing portion 3 are different to adapt to the magnitude of the sealing force at different positions and avoid deformation. The traditional method is to prevent deformation by increasing the number of gaskets, but the increase in the number of gaskets not only leads to the risk of air leakage, but also causes the exhaust pipe flange bolts to be unable to provide sufficient axial force, thereby reducing the sealing reliability. Therefore, the present application does not need to increase the number of gaskets to improve the sealing force, can effectively improve the sealing reliability, enhance the user experience, avoid the deformation of the sealing structure caused by the uneven distribution of the exhaust pipe flange bolts, further ensure the uniform force of the sealing structure, and further improve the ability of the sealing structure to resist deformation.

[0044] As a preferred embodiment, the first sealing portion 2 includes a first sealing segment 6 and a second sealing segment 7; one side of the first sealing segment 6 is connected to the sealing body 1, and the other side of the first sealing segment 6 is connected to the second sealing segment 7; the height of the second sealing segment 7 is higher than the height of the first sealing segment 6.

[0045] By designing the first sealing portion 2 as a multi-section structure including a first sealing segment 6 and a second sealing segment 7, the area of ​​the first sealing portion 2 can be increased, thereby increasing the sealing area and reducing the deformation area; and the second sealing segment 7 is closer to the fluid hole 13 than the first sealing segment 6, and the height h of the second sealing segment is higher than the height of the first sealing segment 6. Compared with the first sealing segment 6, the second sealing segment 7 is highly protruding, thereby further enhancing the sealing performance and anti-side leakage performance. The protruding second sealing segment 7 can be more tightly connected to the exhaust pipe flange, thereby reducing leakage and enhancing the sealing effect; it can also further improve safety and reliability.

[0046] Moreover, under high temperature and high pressure, the sealing structure may be deformed or ruptured due to internal pressure. Setting the height h of the second sealing section 7 higher than the height of the first sealing section 6 can withstand the internal pressure, maintain the overall integrity of the sealing structure, and prevent leakage.

[0047] The structural arrangement of the first sealing segment 6, the second sealing segment 7 and the third sealing segment 8 is not limited by the present application and can adopt any of the following embodiments:

[0048] Embodiment 1: The first sealing segment 6 and the second sealing segment 7 are planar structures, and the first sealing segment 6 is obliquely connected to one side of the second sealing segment 7 .

[0049] The first sealing segment 6 and the second sealing segment 7 are planar structures, facilitating contact and connection with the exhaust pipe flange. Since the seal body 1 is planar and the first sealing segment 6 is connected between the second sealing segment 7 and the seal body 1, and the second sealing segment 7 is taller than the first sealing segment 6, the first sealing segment 6 is arranged obliquely relative to the second sealing segment 7. Preferably, the height h of the second sealing segment 7 is in the range of 0.3-0.7 mm, and the width w of the second sealing segment 7 is in the range of 2-4 mm.

[0050] Embodiment 2: The first sealing section 6 is a planar structure, and the second sealing section 7 is a curved structure.

[0051] The first sealing segment 6 may also adopt a planar structure, and the second sealing segment 7 may adopt a curved structure, with the width direction of the first sealing segment 6 being perpendicular to the axis direction of the second sealing segment 7. Preferably, the height h of the second sealing segment 7 is in the range of 0.2-0.5 mm, and the width w of the second sealing segment 7 is in the range of 2-4 mm.

[0052] Embodiment 3: The first sealing segment 6 is a planar structure, and the second sealing segment 7 is a zigzag segment structure. The second sealing segment 7 comprises a first segment 9, a second segment 10, and a third segment 11, which are connected in sequence. The first segment 9 is connected to the first sealing segment 6, the second segment 10 is connected to one side of the first segment 9, and the third segment 11 is connected to the other side of the second segment 10. The first and third segments 9, 11 are symmetrically arranged on either side of the second segment 10, with the first and third segments 9, 11 being arranged at an angle, while the second segment 10 is arranged horizontally. Preferably, the height h of the second sealing segment 7 ranges from 0.2 to 0.5 mm, and the width w of the second sealing segment 7 ranges from 2 to 4 mm.

[0053] Furthermore, the first sealing portion 2 further includes a third sealing segment 8 ; the third sealing segment 8 is connected to a side of the second sealing segment 7 facing the fluid hole 13 .

[0054] In order to further increase the sealing area of ​​the first sealing portion 2 and the contact area between the first sealing portion 2 and the exhaust pipe flange, the first sealing portion 2 may also include a third sealing segment 8. The third sealing segment 8 is connected to the side of the second sealing segment 7 facing the fluid hole 13. The first sealing segment 6, the second sealing segment 7 and the third sealing segment 8 fit tightly with the exhaust pipe flange to reduce leakage, enhance the sealing effect, and further improve reliability.

[0055] When the first sealing segment 6 adopts a planar structure and the second sealing segment 7 adopts a broken line segment structure, the third sealing segment 8 is connected to one side of the third segment 11 .

[0056] Furthermore, when the first sealing segment 6 adopts a planar structure and the second sealing segment 7 adopts an arc surface structure, or when the first sealing segment 6 adopts a planar structure and the second sealing segment 7 adopts a broken line segment structure, preferably, the third sealing segment 8 and the first sealing segment 6 are symmetrically arranged on both sides of the second sealing segment 7, and the angle between the third sealing segment 8 and the first sealing segment 6 is an obtuse angle.

[0057] The third sealing segment 8 and the first sealing segment 6 are symmetrically arranged to improve the uniformity of force and increase the fitting area with the exhaust pipe flange, thereby enhancing the sealing effect and preventing side leakage. The third sealing segment 8 and the second sealing segment 7 are arranged at an obtuse angle. Since the third sealing segment 8 and the first sealing segment 6 are symmetrically arranged, the first sealing segment 6 and the second sealing segment 7 are arranged at an obtuse angle, thereby achieving the second sealing segment 7 protruding from the first sealing segment 6 and the third sealing segment 8, so that the second sealing segment 7 can fit tightly with the exhaust pipe flange, enhancing the sealing performance between the exhaust pipe flange, thereby improving the sealing effect of the entire sealing structure and improving reliability and safety.

[0058] In addition, the first sealing portion 2 may further include a fourth sealing segment connected to one side of the third sealing segment 8 .

[0059] As a preferred embodiment, the second sealing portion 3 includes a first sealing transition section and a second sealing transition section; one side of the first sealing transition section is connected to the sealing body 1, and the other side of the first sealing transition section is connected to the second sealing transition section; the height of the second sealing transition section is higher than the height of the first sealing transition section.

[0060] By designing the second sealing portion 3 as a multi-section structure including a first sealing transition section and a second sealing transition section, the area of ​​the second sealing portion 3 can be increased, thereby increasing the sealing area and reducing the deformation area; and the second sealing transition section is closer to the fluid hole 13 than the first sealing transition section, and is higher than the first sealing transition section. Compared with the first sealing transition section, the second sealing transition section is highly protruding, thereby further enhancing the sealing performance and anti-side leakage performance. The protruding second sealing transition section can be more tightly connected to the exhaust pipe flange, thereby reducing leakage and enhancing the sealing effect; it can also further improve safety and reliability.

[0061] As a preferred embodiment, the height of the second sealing transition section is higher than the height of the second sealing section 7 , and the width of the second sealing transition section is smaller than the width of the second sealing section 7 .

[0062] The second sealing part 3 and the first sealing part 2 surround the circumference of the fluid hole 13, but the positions of the first sealing part 2 and the second sealing part 3 are different. The first sealing part 2 is close to the mounting hole 12, and the axial force provided by the exhaust pipe flange bolts is large, so the sealing force provided by the first sealing part 2 needs to be increased, so the width of the first sealing part 2 is designed to be wide and the height is designed to be short; while the second sealing part 3 is far away from the mounting hole 12, the axial force provided by the exhaust pipe flange bolts is small, and the sealing force provided by the required second sealing part 3 is small, so the width of the second sealing part 3 is designed to be narrow and the height is designed to be high. Therefore, the height of the second sealing section 7 of the first sealing part 2 is smaller than the height of the second sealing transition section of the second sealing part 3, and the width of the second sealing section 7 of the first sealing part 2 is larger than the width of the second sealing transition section of the second sealing part 3, so as to improve the sealing force and make the force of the sealing structure more uniform, reduce deformation, prevent leakage, enhance the sealing effect, and improve safety and reliability.

[0063] As a preferred embodiment, the second sealing portion 3 further includes a third sealing transition section; the third sealing transition section is connected to a side of the second sealing transition section facing the fluid hole 13 .

[0064] In order to further increase the sealing area of ​​the second sealing portion 3 and the contact area between the second sealing portion 3 and the exhaust pipe flange, the second sealing portion 3 may also include a third sealing transition section, and the third sealing transition section is connected to the side of the second sealing transition section facing the fluid hole 13. The first sealing transition section, the second sealing transition section and the third sealing transition section are tightly fitted with the exhaust pipe flange to reduce leakage, enhance the sealing effect, and further improve reliability.

[0065] The structural arrangement of the first sealing transition section, the second sealing transition section, and the third sealing transition section is not limited by the present application and may adopt any of the following embodiments:

[0066] Embodiment 1: The first sealing transition section and the second sealing transition section are planar structures, and the first sealing transition section is obliquely connected to one side of the second sealing transition section.

[0067] The first and second sealing transition sections adopt a planar structure, facilitating contact and connection with the exhaust pipe flange. Since the seal body 1 is a planar structure, the first sealing transition section connects between the second sealing transition section and the seal body 1. The second sealing transition section is taller than the first sealing transition section, so the first sealing transition section is tilted relative to the second sealing transition section. Preferably, the height of the second sealing transition section ranges from 0.3 to 0.7 mm, and the width of the second sealing transition section ranges from 2 to 4 mm.

[0068] Embodiment 2: The first sealing transition section has a planar structure, and the second sealing transition section has a curved structure.

[0069] The first sealing transition section can also adopt a planar structure, and the second sealing transition section can adopt a curved surface structure. The width direction of the first sealing transition section is perpendicular to the axis direction of the second sealing transition section. Preferably, the height of the second sealing transition section ranges from 0.2 to 0.5 mm; the width of the second sealing transition section ranges from 2 to 4 mm.

[0070] Embodiment 3: The first sealing transition section has a planar structure, and the second sealing transition section has a zigzag structure. The second sealing transition section includes a first section 9, a second section 10, and a third section 11, which are sequentially connected. The first section 9 is connected to the first sealing transition section, the second section 10 is connected to one side of the first section 9, and the third section 11 is connected to the other side of the second section 10. The first section 9 and the third section 11 are symmetrically connected to either side of the second section 10, the first section 9 and the third section 11 are arranged at an angle, and the second section 10 is arranged horizontally. Preferably, the height of the second sealing transition section ranges from 0.2 to 0.5 mm, and the width of the second sealing transition section ranges from 2 to 4 mm.

[0071] A special-shaped sealing structure also includes a third sealing part 4; the third sealing part 4 is arranged opposite to the first sealing part 2; the third sealing part 4 includes a first sealing structure segment and a second sealing structure segment; one side of the first sealing structure segment is connected to the sealing body 1, and the other side of the first sealing structure segment is connected to the second sealing structure segment; the height of the second sealing structure segment is higher than the height of the first sealing structure segment.

[0072] By designing the third sealing part 4 as a multi-section structure including a first sealing structure segment and a second sealing structure segment, the area of ​​the third sealing part 4 can be increased, thereby increasing the sealing area and reducing the deformation area; and the second sealing structure segment is closer to the fluid hole 13 than the first sealing structure segment, and is higher than the first sealing structure segment. Compared with the first sealing structure segment, the second sealing structure segment is highly protruding, thereby further enhancing the sealing performance and anti-side leakage performance. The protruding second sealing structure segment can be more tightly connected to the exhaust pipe flange, thereby reducing leakage and enhancing the sealing effect; it can also further improve safety and reliability.

[0073] Furthermore, the third sealing portion 4 further includes a third sealing structure segment, which is connected to a side of the second sealing structure segment facing the fluid hole 13 .

[0074] In order to further increase the sealing area of ​​the third sealing part 4 and increase the contact area between the third sealing part 4 and the exhaust pipe flange, the third sealing part 4 can also include a third sealing structure segment, and the third sealing structure segment is connected to the side of the second sealing structure segment facing the fluid hole 13. The first sealing structure segment, the second sealing structure segment and the third sealing structure segment are tightly fitted with the exhaust pipe flange to reduce leakage, enhance the sealing effect, and further improve reliability.

[0075] The structural arrangement of the first sealing structure segment, the second sealing structure segment, and the third sealing structure segment is not limited by the present application and can adopt any of the following implementations:

[0076] Embodiment 1: The first sealing structure segment and the second sealing structure segment are planar structures, and the first sealing structure segment is obliquely connected to one side of the second sealing structure segment.

[0077] The first and second sealing segments are flat, facilitating contact and connection with the exhaust pipe flange. Since the seal body 1 is flat, the first sealing segment is connected between the second sealing segment and the seal body 1. The second sealing segment is taller than the first, so the first sealing segment is tilted relative to the second. Preferably, the second sealing segment has a height range of 0.5-0.8 mm and a width range of 1.5-3 mm.

[0078] Embodiment 2: The first sealing structure segment is a planar structure, and the second sealing structure segment is a curved structure.

[0079] The first sealing structure segment can also adopt a flat structure, and the second sealing structure segment can adopt a curved structure. The width direction of the first sealing structure segment is perpendicular to the axis direction of the second sealing structure segment. Preferably, the height range of the second sealing structure segment is 0.3-0.6mm; the width range of the second sealing structure segment is 1.5-3mm.

[0080] Embodiment 3: The first sealing structure segment is a planar structure, and the second sealing structure segment is a broken line segment structure. The second sealing structure segment includes a first segment 9, a second segment 10, and a third segment 11, which are connected in sequence. The first segment 9 is connected to the first sealing structure segment, the second segment 10 is connected to one side of the first segment 9, and the third segment 11 is connected to the other side of the second segment 10. The first segment 9 and the third segment 11 are symmetrically connected to the second segment 10 on either side. The first segment 9 and the third segment 11 are arranged at an angle, and the second segment 10 is arranged horizontally. Preferably, the height of the second sealing structure segment ranges from 0.3 to 0.6 mm, and the width of the second sealing structure segment ranges from 1.5 to 3 mm.

[0081] A special-shaped sealing structure also includes a fourth sealing portion 5; the fourth sealing portion 5 is arranged opposite to the second sealing portion 3; the fourth sealing portion 5 includes a first sealing connection segment and a second sealing connection segment; one side of the first sealing connection segment is connected to the sealing body 1, and the other side of the first sealing connection segment is connected to the second sealing connection segment; the height of the second sealing connection segment is higher than the height of the first sealing connection segment.

[0082] The fourth sealing portion 5 is disposed opposite the second sealing portion 3, and the mounting hole 12 is disposed on both sides of the seal body 1. The first sealing portion 2 and the third sealing portion 4 are disposed opposite each other, with the first sealing portion 2 being close to the mounting hole 12, the third sealing portion 4 being close to the mounting hole 12, the second sealing portion 3 being distant from the mounting hole 12, and the fourth sealing portion 5 being distant from the mounting hole 12. By designing the fourth sealing portion 5 as a multi-segment structure comprising a first sealing connection segment and a second sealing connection segment, the area of ​​the fourth sealing portion 5 can be increased, thereby increasing the sealing area and reducing the deformation area. Furthermore, the second sealing connection segment is closer to the fluid hole 13 and taller than the first sealing connection segment, and is more protruding than the first sealing connection segment, thereby further enhancing the sealing performance and the side leakage prevention performance. The protruding second sealing structure segment can be more tightly connected to the exhaust pipe flange, thereby reducing leakage and enhancing the sealing effect. This can also further improve safety and reliability.

[0083] Furthermore, the fourth sealing portion 5 further includes a third sealing connection section, which is connected to a side of the second sealing connection section facing the fluid hole 13 .

[0084] In order to further increase the sealing area of ​​the fourth sealing part 5 and increase the contact area between the fourth sealing part 5 and the exhaust pipe flange, the fourth sealing part 5 can also include a third sealing connection section, and the third sealing connection section is connected to the side of the second sealing connection section facing the fluid hole 13. The first sealing connection section, the second sealing connection section and the third sealing connection section are tightly fitted with the exhaust pipe flange to reduce leakage, enhance the sealing effect, and further improve reliability.

[0085] The structural arrangement of the first sealing connection section, the second sealing connection section, and the third sealing connection section is not limited by the present application and can adopt any of the following embodiments:

[0086] Embodiment 1: The first sealing connection section and the second sealing connection section are planar structures, and the first sealing connection section is obliquely connected to one side of the second sealing connection section.

[0087] The first and second sealing sections are flat, facilitating contact and connection with the exhaust pipe flange. Since the seal body 1 is flat, the first sealing section connects between the second sealing section and the seal body 1. The second sealing section is taller than the first, so the first sealing section is tilted relative to the second. Preferably, the height of the second sealing section ranges from 0.5 to 0.8 mm, and the width ranges from 1.5 to 3 mm.

[0088] Embodiment 2: The first sealing connection section has a planar structure, and the second sealing connection section has a curved structure.

[0089] The first sealing connection section can also adopt a flat structure, and the second sealing connection section can adopt a curved structure. The width direction of the first sealing connection section is perpendicular to the axis direction of the second sealing connection section. Preferably, the height range of the second sealing connection section is 0.3-0.6mm; the width range of the second sealing connection section is 0.2-0.5mm.

[0090] Embodiment 3: The first sealing connection segment has a planar structure, and the second sealing connection segment has a broken line structure. The second sealing connection segment includes a first segment 9, a second segment 10, and a third segment 11, which are connected in sequence. The first segment 9 is connected to one side of the first sealing connection segment at an angle, the second segment 10 is connected to the other side of the first segment 9 horizontally, and the third segment 11 is symmetrically arranged with the first segment 9 and connected to the other side of the second segment 10. Preferably, the height of the second sealing connection segment ranges from 0.3 to 0.6 mm, and the width of the second sealing connection segment ranges from 0.2 to 0.5 mm.

[0091] like Figure 1As shown, in this application, mounting holes 12 are respectively provided on the top and bottom sides of the seal body 1. Two mounting holes 12 are provided on the top side for installing exhaust pipe flange bolts, and one mounting hole 12 is provided on the bottom side for installing exhaust pipe flange bolts; a fluid hole 13 is provided in the middle of the seal body 1, and the fluid hole 13 can be connected to the exhaust pipe to form a fluid channel for airflow, and the first sealing portion 2, the second sealing portion 3 and the third sealing portion 4 described below and the fourth sealing portion 5 described below of this application are respectively arranged around the circumference of the fluid hole 13, as shown in FIG. Figure 1 As shown, the first sealing portion 2 is arranged near the top side; the third sealing portion 4 is arranged opposite to the first sealing portion 2 and is arranged near the bottom side; the second sealing portion 3 is arranged between the first sealing portion 2 and the third sealing portion 4 away from the mounting hole 12, and is located on the left side of the figure; the fourth sealing portion 5 is arranged between the first sealing portion 2 and the third sealing portion 4 away from the mounting hole 12, and is located on the right side of the figure; the first sealing portion 2, the second sealing portion 3, the third sealing portion 4 and the fourth sealing portion 5 are arranged around the fluid hole 13, and the first sealing portion 2, the second sealing portion 3, the third sealing portion 4 and the fourth sealing portion 5 can be connected in a ring shape in sequence around the fluid hole 13, or can be arranged in a partial area of ​​the circle around the fluid hole 13.

[0092] It should be noted that the first sealing part 2 and the third sealing part 4 are close to the mounting hole 12, so the axial force they are subjected to is relatively large, and the sealing force required to be provided by the first sealing part 2 and the third sealing part 4 is large, so the width of the first sealing part 2 and / or the third sealing part 4 is greater than the width of the second sealing part 3, and the height of the first sealing part 2 and / or the third sealing part 4 is less than the height of the second sealing part 3. In addition, the width of the first sealing part 2 and / or the third sealing part 4 is greater than the width of the fourth sealing part 5, and the height of the first sealing part 2 and / or the third sealing part 4 is less than the height of the fourth sealing part 5.

[0093] The pressure distribution of the exhaust pipe flange bolts is inversely proportional to the height of the first sealing part 2, the second sealing part 3, the third sealing part 4 and the fourth sealing part 5, and is directly proportional to the width of the first sealing part 2, the second sealing part 3, the third sealing part 4 and the fourth sealing part 5. Therefore, when the pressure of the exhaust pipe flange bolts is large, the sealing force provided by the first sealing part 2, the second sealing part 3, the third sealing part 4 and the fourth sealing part 5 is required to be large. In order to ensure uniform force, the height of the first sealing part 2, the second sealing part 3, the third sealing part 4 and the fourth sealing part 5 is designed to be low; when the pressure of the exhaust pipe flange bolts is large, the sealing force provided by the first sealing part 2, the second sealing part 3, the third sealing part 4 and the fourth sealing part 5 is required to be large. In order to ensure uniform force, the width of the first sealing part 2, the second sealing part 3, the third sealing part 4 and the fourth sealing part 5 is designed to be wide.

[0094] In addition, if the axial force provided by the exhaust pipe flange bolts is large, but the exhaust pipe is slightly deformed by heat, the sealing force provided by the first sealing part 2 and the third sealing part 4 is required to be small. Therefore, at this time, the width of the first sealing part 2 and the third sealing part 4 is appropriately increased, while the height of the first sealing part 2 and the third sealing part 4 is appropriately reduced.

[0095] In addition, if the axial force provided by the exhaust pipe flange bolts is small, and the exhaust pipe is greatly deformed by heat, the sealing force provided by the second sealing part 3 and the fourth sealing part 5 needs to be large, so at this time the width of the second sealing part 3 and the fourth sealing part 5 needs to be narrowed, and the height needs to be increased; if the axial force provided by the exhaust pipe flange bolts is small, and the exhaust pipe is greatly deformed by heat, the sealing force provided by the second sealing part 3 and the fourth sealing part 5 needs to be small, so at this time the width of the second sealing part 3 and the fourth sealing part 5 needs to be increased, and the height of the second sealing part 3 and the fourth sealing part 5 needs to be reduced.

[0096] Anything not described in this utility model can be achieved by adopting or drawing on existing technologies.

[0097] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on the differences from other embodiments.

[0098] The above description is merely an embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of the claims of the present invention.

Claims

1. A special-shaped sealing structure connected between the exhaust pipe and the engine, characterized in that: The invention comprises a sealing body (1); a fluid hole (13) is provided at the center of the sealing body (1); the fluid hole (13) is correspondingly connected to the exhaust hole of the exhaust pipe to form a fluid channel for airflow; and mounting holes (12) for mounting exhaust pipe flange bolts are respectively provided on both sides of the sealing body (1); The sealing body (1) has a sealing portion that is at least partially raised along the circumference of the fluid hole (13); the sealing portion includes a first sealing portion (2) and a second sealing portion (3); the first sealing portion (2) is close to the mounting hole (12), the second sealing portion (3) is far from the mounting hole (12), the height of the first sealing portion (2) is lower than the height of the second sealing portion (3), and the width of the first sealing portion (2) is greater than the width of the second sealing portion (3).

2. The special-shaped sealing structure according to claim 1, characterized in that: The first sealing portion (2) comprises a first sealing segment (6) and a second sealing segment (7); one side of the first sealing segment (6) is connected to the sealing element body (1), and the other side of the first sealing segment (6) is connected to the second sealing segment (7); the height of the second sealing segment (7) is higher than the height of the first sealing segment (6).

3. The special-shaped sealing structure according to claim 2, characterized in that: The first sealing segment (6) and the second sealing segment (7) are planar structures, and the first sealing segment (6) is obliquely connected to one side of the second sealing segment (7); or, the first sealing segment (6) is a planar structure, and the second sealing segment (7) is an arcuate structure; or, the first sealing segment (6) is a planar structure, and the second sealing segment (7) is a broken line segment structure.

4. The special-shaped sealing structure according to claim 2, characterized in that: The first sealing portion (2) further comprises a third sealing segment (8); the third sealing segment (8) is connected to a side of the second sealing segment (7) facing the fluid hole (13).

5. The special-shaped sealing structure according to claim 4, characterized in that: When the first sealing segment (6) is in a planar structure and the second sealing segment (7) is in an arcuate or broken line segment structure, the third sealing segment (8) and the first sealing segment (6) are symmetrically arranged on both sides of the second sealing segment (7), and the angle between the third sealing segment (8) and the second sealing segment (7) is an obtuse angle.

6. The special-shaped sealing structure according to claim 2, characterized in that: The second sealing portion (3) comprises a first sealing transition section and a second sealing transition section; one side of the first sealing transition section is connected to the sealing element body (1), and the other side of the first sealing transition section is connected to the second sealing transition section; the height of the second sealing transition section is higher than the height of the first sealing transition section.

7. The special-shaped sealing structure according to claim 6, characterized in that: The height of the second sealing transition section is higher than the height of the second sealing section (7), and the width of the second sealing transition section is smaller than the width of the second sealing section (7).

8. The special-shaped sealing structure according to claim 6, characterized in that: The second sealing portion (3) further comprises a third sealing transition section; the third sealing transition section is connected to a side of the second sealing transition section facing the fluid hole (13).

9. The special-shaped sealing structure according to claim 1, characterized in that: The invention also includes a third sealing portion (4); the third sealing portion (4) is arranged opposite to the first sealing portion (2); the third sealing portion (4) includes a first sealing structure segment and a second sealing structure segment; one side of the first sealing structure segment is connected to the sealing element body (1), and the other side of the first sealing structure segment is connected to the second sealing structure segment; the height of the second sealing structure segment is higher than the height of the first sealing structure segment.

10. The special-shaped sealing structure according to claim 1, characterized in that: The invention also includes a fourth sealing portion (5); the fourth sealing portion (5) is arranged opposite to the second sealing portion (3); the fourth sealing portion (5) includes a first sealing connection section and a second sealing connection section; one side of the first sealing connection section is connected to the sealing element body (1), and the other side of the first sealing connection section is connected to the second sealing connection section; the height of the second sealing connection section is higher than the height of the first sealing connection section.

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