Exhaust system seal and anti-deflection structure

Abstract

The application relates to the technical field of exhaust manifold devices, and provides an exhaust system sealing and anti-deflection structure which comprises a first exhaust manifold, a second exhaust manifold, a double-wave sealing ring and a plurality of anti-deflection devices, the first exhaust manifold is provided with a male plug end; the second exhaust manifold is provided with a female plug end which is matched with the male plug end in a plug-in mode, a plurality of positioning grooves are arranged on the inner wall of the female plug end; the double-wave sealing ring is abutted between the male plug end and the female plug end, the double-wave sealing ring is arranged in an asymmetric arc structure of inner and outer wall surfaces; a plurality of the anti-deflection devices are arranged in one-to-one correspondence with a plurality of the positioning grooves, one end of the anti-deflection device is connected with the outer wall surface of the double-wave sealing ring, and the other end of the anti-deflection device is elastically abutted in the positioning groove after extending along the radial direction of the second exhaust manifold. The application can avoid the deflection of the sealing ring in the assembly process and the running process, and has high reliability.

Description

Technical Field

[0001] This invention relates to the field of exhaust manifold device technology, and in particular to an exhaust system sealing and anti-deflection structure. Background Technology

[0002] In the field of medium and heavy-duty diesel engines, the exhaust manifold currently mainly adopts a segmented plug-in structure. For the sealing of this segmented plug-in structure, most methods employ sealing rings or a bare tube thermal expansion structure. The bare tube thermal expansion structure places extremely strict requirements on the fit clearance of the exhaust manifold; too small a fit clearance can easily cause the exhaust manifold to crack. Therefore, sealing ring structures are more commonly used in diesel engines. Currently, there are two types of sealing ring structures: one is a simple open ring structure, which is simple in structure but prone to leakage during the initial operation of the engine, and the leakage becomes increasingly noticeable over time; therefore, this technology has been largely phased out. The other type of sealing ring structure is the most widely used closed sealing ring structure, such as the V-ring. This structure has an interference fit with the exhaust manifold, which can greatly reduce the initial leakage.

[0003] Most engines use turbocharging technology, with exhaust gas temperatures reaching 700 degrees Celsius and exhaust gas pressures reaching 3.5 bar. Exhaust temperatures and turbine inlet pressures can vary significantly under different operating conditions. During initial assembly and engine operation, closed sealing ring structures such as V-rings are prone to ring deflection, causing the interference fit between the V-ring and the exhaust manifold to fail. This leads to exhaust system leakage, affecting engine efficiency, causing engine thermal hazards, and in more serious cases, engine fire, endangering personal safety. Therefore, solving the sealing ring deflection problem is particularly important. Summary of the Invention

[0004] This invention provides a sealing and anti-deflection structure for an exhaust system, which solves the defect of existing closed sealing ring structures that are prone to ring deflection during initial assembly and engine operation. This invention avoids deflection of the sealing ring during assembly and operation, and achieves high reliability.

[0005] This invention provides a sealing and anti-deflection structure for an exhaust system, comprising:

[0006] A first exhaust manifold, the first exhaust manifold having a male connector;

[0007] The second exhaust manifold has a female plug that is inserted into the male plug, and the inner wall of the female plug has a plurality of positioning grooves.

[0008] A double-wave sealing ring, wherein the double-wave sealing ring abuts between the male end and the female end, and the double-wave sealing ring is configured with an asymmetrical arc-shaped structure on the inner and outer walls;

[0009] Multiple anti-deflection devices are provided, and each of the multiple anti-deflection devices is correspondingly arranged with a positioning groove. One end of each anti-deflection device is connected to the outer wall surface of the double-wave sealing ring, and the other end extends radially along the second exhaust manifold and elastically abuts against the positioning groove.

[0010] According to the present invention, a sealing and anti-deflection structure for an exhaust system is provided. The anti-deflection device includes a guide seat, an elastic element, an inner pin, an outer pin, and a positioning boss. The guide seat is fixedly connected to the outer wall surface of the double-wave sealing ring. One end of the inner pin is fixedly connected to the guide seat, and the other end extends into the outer pin and engages with it. The end of the outer pin away from the guide seat is connected to the positioning boss. The positioning boss abuts against the positioning groove. The elastic element is sleeved on the outer periphery of the guide seat and the outer pin. One end of the elastic element is connected to the outer wall surface of the double-wave sealing ring, and the other end is connected to the positioning boss.

[0011] According to the present invention, a sealing and anti-deflection structure for an exhaust system is provided, wherein the double-wave sealing ring is provided with a support base corresponding to the position of the plurality of anti-deflection devices, and the guide seat is fixedly connected to the support base.

[0012] According to the present invention, the end of the positioning boss away from the outer pin is an arc structure. The two opposite sides of the positioning boss along the insertion direction are, on one side, an anti-deflection positioning plane structure, and on the other side, an arc surface and an anti-deflection positioning plane structure.

[0013] According to the present invention, a sealing and anti-deflection structure for an exhaust system is provided, wherein a limiting hole is provided on the side of the outer pin facing the inner pin, and a limiting boss is provided at the end of the inner pin that extends into the outer pin. The limiting boss cooperates with the limiting hole to guide and limit the movement of the outer pin and the inner pin.

[0014] According to the present invention, a sealing and anti-deflection structure for an exhaust system is provided, wherein the periphery of the positioning groove is provided with a rounded corner structure.

[0015] According to the present invention, an exhaust system sealing and anti-deflection structure is provided, wherein the number of anti-deflection devices is four, the number of positioning grooves is four, the four anti-deflection devices are evenly distributed on the outer wall surface of the double-wave sealing ring along the circumference of the double-wave sealing ring, and the four positioning grooves are evenly distributed on the inner wall of the female insertion end along the circumference of the female insertion end, and the corresponding anti-deflection devices and positioning grooves are in the same radial direction.

[0016] According to the present invention, a sealing and anti-deflection structure for an exhaust system is provided, wherein the double-wave sealing ring includes a first abutting section, a connecting section and a second abutting section connected in sequence. The first abutting section and the second abutting section are bent toward the second exhaust manifold relative to the connecting section along the insertion direction. The first abutting section abuts against the outer wall surface of the male insertion end and the second abutting section abuts against the inner wall surface of the female insertion end.

[0017] According to the present invention, a sealing and anti-deflection structure for an exhaust system is provided, wherein at least two first sealing waves are provided on the first abutting section, and the first sealing waves protrude toward the outer wall surface of the male plug end;

[0018] At least two second sealing waves are provided on the second abutting section, arranged along the insertion direction, and the second sealing waves protrude toward the inner wall surface of the female insertion end.

[0019] According to the present invention, the first inner flow channel of the first exhaust manifold and the second inner flow channel of the second exhaust manifold are coaxial in cross-section and have the same area.

[0020] The exhaust system sealing and anti-deflection structure provided by this invention uses an asymmetrical arc-shaped structure for the inner and outer walls of the double-wave sealing ring. This ensures that the sealing ring maintains a stable shape and position under internal and external pressure, reducing deflection caused by uneven pressure. The asymmetrical design also provides better sealing performance because the sealing surface can be adjusted according to the actual pressure distribution. Simultaneously, multiple anti-deflection devices are correspondingly arranged with multiple positioning grooves to ensure that each anti-deflection device is accurately positioned in its respective groove, thereby providing uniform support and fixation for the sealing ring in the radial direction and preventing deflection during assembly and operation. One end of the anti-deflection device is connected to the outer wall of the double-wave sealing ring, and the other end extends radially along the second exhaust manifold and elastically abuts against the positioning groove. This allows the anti-deflection device to form an elastic support between the sealing ring and the exhaust manifold, effectively limiting the radial and axial movement of the sealing ring and preventing deflection. Thus, this application can prevent the sealing ring from deflecting during assembly and operation, improve the reliability of the sealing system, reduce the risk of air leakage caused by the deflection of the sealing ring, and thereby improve the overall performance and safety of the engine. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in this invention 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 some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is a front view of an exhaust system sealing and anti-deflection structure provided by the present invention.

[0023] Figure 2 This is a left view of an exhaust system sealing and anti-deflection structure provided by the present invention.

[0024] Figure 3 This is a partially enlarged view of an exhaust system sealing and anti-deflection structure provided by the present invention.

[0025] Figure 4 This is a partial enlarged view of the anti-deflection device provided by the present invention.

[0026] Figure label:

[0027] 1. First exhaust manifold; 11. Inner step; 12. Outer step; 13. First inner flow channel; 2. Second exhaust manifold; 21. Inner hole; 22. Outer hole; 23. Positioning groove; 24. Second inner flow channel; 3. Double wave sealing ring; 4. Support base; 5. Guide seat; 6. Elastic element; 7. Inner pin; 8. Outer pin; 9. Positioning boss. Detailed Implementation

[0028] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0029] In the description of the embodiments of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention based on the specific circumstances.

[0031] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0032] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0033] The following is combined Figures 1 to 4 The exhaust system sealing and anti-deflection structure provided in this invention will be described in detail through specific embodiments and application scenarios.

[0034] In embodiments of the present invention, such as Figure 1 As shown, the exhaust system sealing and anti-deflection structure includes a first exhaust manifold 1, a second exhaust manifold 2, a double-wave sealing ring 3, and multiple anti-deflection devices. The first exhaust manifold 1 has a male connector; the second exhaust manifold 2 has a female connector that engages with the male connector, and the inner wall of the female connector has multiple positioning grooves 23; the double-wave sealing ring 3 abuts between the male connector and the female connector, and the double-wave sealing ring 3 has an asymmetrical arc-shaped structure with inner and outer wall surfaces; multiple anti-deflection devices are arranged one-to-one with multiple positioning grooves 23, one end of the anti-deflection device is connected to the outer wall surface of the double-wave sealing ring 3, and the other end extends radially along the second exhaust manifold 2 and elastically abuts against the positioning groove 23.

[0035] The male connector of the first exhaust manifold 1, which is part of the exhaust manifold, is used to connect and mate with the female connector of the second exhaust manifold 2. It provides a connection interface that allows the two manifolds to be quickly and securely connected together.

[0036] The second exhaust manifold 2 has a female connector that mates with the male connector. The inner wall of the female connector has multiple positioning grooves 23. The female connector mates with the male connector of the first exhaust manifold 1, connecting the two manifolds. The positioning grooves 23 correspond to the anti-deflection device, ensuring the sealing ring remains in the correct position after assembly and preventing deflection.

[0037] Specifically, the first exhaust manifold 1 is provided with an inner step 11, an outer step 12, and a first inner flow channel 13. The outer step 12 has a chamfer on its right end face, and the inner step 11 has a rounded corner on its left end face. The inner step 11 extends into the inner hole 21, and the outer step 12 extends into the outer hole 22. The inner step 11 has a chamfer on its right end face. There is a certain expansion margin between the right end face of the inner step 11 and the right end face of the inner hole 21, and there is a certain expansion margin between the inner step 11 and the inner hole 21, and between the outer step 12 and the outer hole 22.

[0038] A rounded corner structure is provided at the junction of the left end face of the inner hole 21 and the right end face of the outer hole 22 to reduce thermal stress. A chamfer and rounded corner are provided on the left end face of the second exhaust manifold 2, and a chamfer and rounded corner are provided on the left end face of the inner hole 21. These serve as guides during the assembly of the first exhaust manifold 1. Four 90° circumferentially distributed positioning grooves 23 are used to position the anti-deflection device of the sealing ring. The positioning grooves 23 are provided with rounded corner structures to facilitate the assembly of the double-wave sealing ring 3 and prevent damage to the sealing wave of the sealing ring during assembly. The first inner flow channel 13 and the second inner flow channel 24 have coaxial cross sections and equal areas, which can effectively improve the exhaust gas flow capacity and reduce the impact of airflow non-uniformity on the sealing ring.

[0039] A chamfer is provided on the right end face of the outer step 12, and a chamfer is also provided on the right end face of the inner step 11. This improves the ease of assembly and facilitates guidance when inserting the exhaust manifold. A rounded corner structure is provided on the left end face of the inner step 11 to reduce thermal stress in the exhaust manifold and lower the risk of cracking. A certain expansion margin is provided between the right end face of the inner step 11 and the right end face of the inner hole 21, which can effectively reduce the risk of thermal cracking of the exhaust manifold. A certain expansion margin is provided between the inner step 11 and the inner hole 21, and a certain expansion margin is provided between the outer step 12 and the outer hole 22. Reasonable expansion margins effectively reduce the risk of thermal cracking of the exhaust manifold and reduce the leakage of the exhaust manifold.

[0040] The double-wave sealing ring 3 abuts between the male and female ends, featuring an asymmetrical arc-shaped structure on its inner and outer walls. This asymmetrical arc-shaped structure adapts to the pressure difference between the exhaust manifolds, maintaining sealing performance. The double-wave design increases the contact area of ​​the sealing surfaces, improving the sealing effect. Under internal and external pressure, this structure helps maintain the stability of the sealing ring and reduces deflection.

[0041] Multiple anti-deflection devices are correspondingly installed with multiple positioning grooves 23. One end of each device connects to the outer wall of the double-wave sealing ring 3, and the other end extends radially along the second exhaust manifold 2 and elastically abuts against the positioning groove 23. The main function of the anti-deflection devices is to fix the double-wave sealing ring 3 and prevent it from deflecting during assembly and operation. Through elastic cooperation with the positioning grooves 23, the anti-deflection devices provide radial support for the sealing ring, ensuring that the sealing ring remains in the correct position. At the same time, a certain degree of elastic displacement is allowed to accommodate assembly tolerances and thermal expansion.

[0042] This application employs an asymmetrical arc-shaped structure for the inner and outer walls of the double-wave sealing ring 3 to ensure that the sealing ring maintains a stable shape and position under internal and external pressure, reducing deflection caused by uneven pressure. The asymmetrical design also provides better sealing performance because the sealing surface can be adjusted according to the actual pressure distribution. Simultaneously, multiple anti-deflection devices are correspondingly arranged with multiple positioning grooves 23 to ensure that each anti-deflection device is accurately positioned in its respective groove 23, thereby providing uniform support and fixation for the sealing ring in the radial direction and preventing deflection during assembly and operation. One end of the anti-deflection device is connected to the outer wall of the double-wave sealing ring 3, and the other end extends radially along the second exhaust manifold 2 and elastically abuts against the positioning groove 23. This allows the anti-deflection device to form an elastic support between the sealing ring and the exhaust manifold, effectively limiting the radial and axial movement of the sealing ring and preventing deflection. Thus, this application can prevent the sealing ring from deflecting during assembly and operation, improve the reliability of the sealing system, reduce the risk of air leakage caused by the deflection of the sealing ring, and thereby improve the overall performance and safety of the engine.

[0043] Reference Figure 3 and Figure 4 According to the present invention, an exhaust system sealing and anti-deflection structure is provided. The anti-deflection device includes a guide seat 5, an elastic element 6, an inner pin 7, an outer pin 8, and a positioning boss 9. The guide seat 5 is fixedly connected to the outer wall surface of the double-wave sealing ring 3. One end of the inner pin 7 is fixedly connected to the guide seat 5, and the other end extends into the outer pin 8 and engages with the outer pin 8. The end of the outer pin 8 away from the guide seat 5 is connected to the positioning boss 9. The positioning boss 9 is abutted against the positioning groove 23. The elastic element 6 is sleeved on the outer periphery of the guide seat 5 and the outer pin 8. One end of the elastic element 6 is connected to the outer wall surface of the double-wave sealing ring 3, and the other end is connected to the positioning boss 9.

[0044] Understandably, the guide seat 5 is fixedly connected to the outer wall of the double-wave sealing ring 3. The guide seat 5 provides a stable support point for the anti-deflection device. It is fixed to the outer wall of the sealing ring, ensuring the positioning accuracy and stability of the entire anti-deflection device.

[0045] The elastic element 6 is sleeved on the outer periphery of the guide seat 5 and the outer pin 8, with one end connected to the outer wall surface of the double-wave sealing ring 3 and the other end connected to the positioning boss 9. The elastic element 6 is a key component in the anti-deflection device, providing the necessary elasticity to keep the sealing ring in the correct position. During assembly and operation, the elastic element 6 can adapt to a certain displacement while maintaining the fixation of the sealing ring and preventing its deflection.

[0046] One end of the inner pin 7 is fixedly connected to the guide seat 5, and the other end extends into the outer pin 8 and engages with it. The inner pin 7 serves to transmit force and motion. Its cooperation with the guide seat 5 and the outer pin 8 ensures that all parts of the anti-deflection device can work together to form a stable support structure.

[0047] One end of the outer pin 8, away from the guide seat 5, is connected to the positioning boss 9, and the other end is engaged with the inner pin 7. The outer pin 8 is the bridge connecting the inner pin 7 and the positioning boss 9. Through its engagement with the inner pin 7, it connects the guide seat 5 and the positioning boss 9, forming a movable but controlled mechanical connection.

[0048] The positioning boss 9 abuts against the positioning groove 23 and connects to the outer pin 8. The positioning boss 9 is the part used for precise positioning in the anti-deflection device. It abuts against the positioning groove 23 of the exhaust manifold female plug end, ensuring the correct radial position of the anti-deflection device, thereby preventing the sealing ring from deflecting.

[0049] Reference Figure 3 and Figure 4 According to the exhaust system sealing and anti-deflection structure provided by the present invention, the double wave sealing ring 3 is provided with a support base 4 at the position of multiple anti-deflection devices, and the guide seat 5 is fixedly connected to the support base 4.

[0050] Understandably, the double-wave sealing ring 3 is equipped with support bases 4 at the locations corresponding to multiple anti-deflection devices. The support bases 4 help maintain the shape and position of the double-wave sealing ring 3, especially under internal and external pressure, preventing deformation and deflection of the sealing ring. The cooperation between the support bases 4 and the anti-deflection devices ensures the correct position of the sealing ring in the exhaust manifold.

[0051] The guide seat 5 is fixedly connected to the support base 4. This fixed connection ensures the correct guidance of the anti-deflection device on the sealing ring, allowing the anti-deflection device to accurately align with the positioning groove 23 of the exhaust manifold. Through this fixed connection, the support base 4 and the guide seat 5 work together to maintain the alignment of the sealing ring and the anti-deflection device during assembly and operation, preventing misalignment.

[0052] Reference Figure 4According to the exhaust system sealing and anti-deflection structure provided by the present invention, the end of the positioning boss 9 away from the outer pin 8 is an arc structure. The positioning boss 9 has two opposite sides along the insertion direction, one side of which is an anti-deflection positioning plane structure and the other side is an arc surface and an anti-deflection positioning plane structure.

[0053] Understandably, the end of the locating boss 9 furthest from the outer pin 8 is rounded. This rounded structure helps reduce stress concentration when the locating boss 9 contacts the locating groove 23, thereby reducing wear or damage caused by excessive contact pressure. The rounded shape also makes it easier to insert and remove the locating boss 9 during assembly and maintenance, improving assembly convenience.

[0054] One of the opposite sides of the positioning boss 9 along the insertion direction is an anti-deflection positioning plane structure. The plane structure provides precise alignment with the positioning groove 23 of the exhaust manifold female connector, ensuring the stability of the anti-deflection device and the accurate position of the sealing ring. The plane structure helps prevent the sealing ring from deflecting in the axial and radial directions because it provides a robust support surface, allowing the sealing ring to remain stable under internal and external pressure.

[0055] The other side of the positioning boss 9 is an arc-shaped surface and an anti-deflection positioning plane structure. The arc-shaped surface can provide a certain degree of elastic compensation, allowing the anti-deflection device to adapt to the small displacement between the exhaust manifold and the sealing ring. At the same time, the arc-shaped surface helps to distribute the pressure evenly across the entire contact surface of the positioning groove 23, thereby improving the reliability of the seal and reducing local wear.

[0056] Reference Figure 4 According to the exhaust system sealing and anti-deflection structure provided by the present invention, a limiting hole is provided on the side of the outer pin 8 facing the inner pin 7, and a limiting boss is provided at the end of the inner pin 7 that extends into the outer pin 8. The limiting boss cooperates with the limiting hole to guide and limit the movement of the outer pin 8 and the inner pin 7.

[0057] Understandably, a limiting hole is provided on the side of the outer pin 8 facing the inner pin 7. This limiting hole provides a precise guide path for the inner pin 7, ensuring proper alignment when inserted into the outer pin 8, thus maintaining the accuracy and stability of the entire anti-deflection device. The limiting hole restricts excessive displacement of the inner pin 7 within the outer pin 8, preventing failure of the anti-deflection device due to excessive movement.

[0058] A limiting boss is provided at one end of the inner pin 7 that extends into the outer pin 8. The limiting boss cooperates with the limiting hole of the outer pin 8 to achieve precise positioning of the inner pin 7 within the outer pin 8, ensuring that all components of the anti-deflection device can be correctly matched according to design requirements.

[0059] The engagement of the limiting boss and the limiting hole restricts the relative movement between the inner pin 7 and the outer pin 8, ensuring that the inner pin 7 and the outer pin 8 can move along a predetermined path without excessive displacement when the anti-deflection device is in operation.

[0060] Reference Figure 3 and Figure 4 According to the exhaust system sealing and anti-deflection structure provided by the present invention, the periphery of the groove opening of the positioning groove 23 is provided with a rounded corner structure.

[0061] Understandably, the rounded corner structure around the locating groove 23 plays multiple roles in improving assembly convenience, enhancing structural durability, improving sealing performance, and optimizing the maintenance process in the exhaust system sealing and anti-deflection structure.

[0062] Reference Figure 2 According to the present invention, an exhaust system sealing and anti-deflection structure is provided, wherein the number of anti-deflection devices is four, the number of positioning grooves 23 is four, the four anti-deflection devices are evenly distributed on the outer wall surface of the double wave sealing ring 3 along the circumference of the double wave sealing ring 3, and the four positioning grooves 23 are evenly distributed on the inner wall of the female insertion end along the circumference of the female insertion end, and the corresponding anti-deflection devices and positioning grooves 23 are located in the same radial direction.

[0063] Understandably, the four anti-deflection devices evenly distributed 90° circumferentially on the double-wave sealing ring 3, in conjunction with the four positioning grooves 23 of the second exhaust manifold 2 evenly distributed 90° circumferentially, achieve multi-directional positioning, avoiding the problem of insufficient anti-deflection capability caused by single positioning. This achieves anti-deflection of the double-wave sealing ring 3 and ensures its reliability. Simultaneously, the uniform layout also helps maintain a consistent gap between the double-wave sealing ring 3 and the female insertion end, thereby improving sealing performance and reducing the risk of leakage.

[0064] Reference Figure 1 According to the exhaust system sealing and anti-deflection structure provided by the present invention, the double-wave sealing ring 3 includes a first abutting section, a connecting section and a second abutting section connected in sequence. The first abutting section and the second abutting section are bent toward the second exhaust manifold 2 relative to the connecting section along the insertion direction. The first abutting section abuts against the outer wall surface of the male insertion end and the second abutting section abuts against the inner wall surface of the female insertion end.

[0065] Understandably, the first and second abutting sections are bent relative to the connecting section along the insertion direction, allowing them to better fit the surfaces of the male and female terminals. When the male and female terminals are inserted, the first abutting section abuts tightly against the outer wall of the male terminal, and the second abutting section abuts tightly against the inner wall of the female terminal, thus forming two sealing lines and enhancing the sealing effect.

[0066] Reference Figure 1According to the exhaust system sealing and anti-deflection structure provided by the present invention, at least two first sealing waves are provided on the first abutting section along the insertion direction, and the first sealing waves protrude toward the outer wall surface of the male end; at least two second sealing waves are provided on the second abutting section along the insertion direction, and the second sealing waves protrude toward the inner wall surface of the female end.

[0067] Understandably, the inclusion of the first and second sealing waves increases the sealing contact surface, resulting in a tighter seal. The first sealing wave protrudes towards the outer wall of the male connector, while the second sealing wave protrudes towards the inner wall of the female connector. This ensures that during insertion, the sealing waves adhere tightly to their respective wall surfaces, forming an effective sealing line. Multiple sealing waves arranged along the insertion direction create multiple sealing barriers. Even if one sealing wave experiences a minor leak for some reason, the others can still maintain a seal, thus improving overall sealing reliability.

[0068] Reference Figure 1 The first inner flow channel 13 of the first exhaust manifold 1 and the second inner flow channel 24 of the second exhaust manifold 2 are coaxial in cross-section and have the same area.

[0069] Understandably, the coaxial and equal-area flow channel design ensures the continuity and consistency of gas flow as it passes through the first exhaust manifold 1 and the second exhaust manifold 2, reducing resistance losses during the flow process and thus improving the overall efficiency of the exhaust system. The equal-area configuration of the flow channel cross-section helps achieve a uniform distribution of gas velocity, which helps reduce the generation of turbulence and eddies, further reducing flow resistance and improving the performance of the exhaust system.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A sealing and anti-deflection structure for an exhaust system, characterized in that, include: A first exhaust manifold, the first exhaust manifold having a male connector; The second exhaust manifold has a female plug that is inserted into the male plug, and the inner wall of the female plug has a plurality of positioning grooves. A double-wave sealing ring, wherein the double-wave sealing ring abuts between the male end and the female end, and the double-wave sealing ring is configured with an asymmetrical arc-shaped structure on the inner and outer walls; Multiple anti-deflection devices are provided, and each of the multiple anti-deflection devices is correspondingly arranged with a positioning groove. One end of each anti-deflection device is connected to the outer wall surface of the double-wave sealing ring, and the other end extends radially along the second exhaust manifold and elastically abuts against the positioning groove. The anti-deflection device includes a guide seat, an elastic element, an inner pin, an outer pin, and a positioning boss. The guide seat is fixedly connected to the outer wall surface of the double-wave sealing ring. One end of the inner pin is fixedly connected to the guide seat, and the other end extends into the outer pin and engages with it. The end of the outer pin away from the guide seat is connected to the positioning boss. The positioning boss abuts against the positioning groove. The elastic element is sleeved on the outer periphery of the guide seat and the outer pin. One end of the elastic element is connected to the outer wall surface of the double-wave sealing ring, and the other end is connected to the positioning boss.

2. The exhaust system sealing and anti-deflection structure according to claim 1, characterized in that, The double-wave sealing ring is provided with a support base corresponding to the position of the plurality of anti-deflection devices, and the guide seat is fixedly connected to the support base.

3. The exhaust system sealing and anti-deflection structure according to claim 1, characterized in that, The end of the positioning boss away from the outer pin has an arc structure. The two opposite sides of the positioning boss along the insertion direction have an anti-deflection positioning plane structure on one side and an arc surface and an anti-deflection positioning plane structure on the other side.

4. The exhaust system sealing and anti-deflection structure according to claim 1, characterized in that, The outer pin has a limiting hole on the side facing the inner pin, and the inner pin has a limiting boss at the end that extends into the outer pin. The limiting boss cooperates with the limiting hole to guide and limit the movement of the outer pin and the inner pin.

5. The exhaust system sealing and anti-deflection structure according to any one of claims 1-4, characterized in that, The periphery of the positioning groove is provided with a rounded corner structure.

6. The exhaust system sealing and anti-deflection structure according to any one of claims 1-4, characterized in that, The number of anti-deflection devices is four, and the number of positioning grooves is four. The four anti-deflection devices are evenly distributed on the outer wall surface of the double-wave sealing ring along the circumference of the double-wave sealing ring, and the four positioning grooves are evenly distributed on the inner wall of the female plug along the circumference of the female plug end. The corresponding anti-deflection devices and positioning grooves are in the same radial direction.

7. The exhaust system sealing and anti-deflection structure according to any one of claims 1-4, characterized in that, The double-wave sealing ring includes a first abutting section, a connecting section, and a second abutting section connected in sequence. The first abutting section and the second abutting section are bent relative to the connecting section towards the second exhaust manifold along the insertion direction. The first abutting section abuts against the outer wall surface of the male plug end, and the second abutting section abuts against the inner wall surface of the female plug end.

8. The exhaust system sealing and anti-deflection structure according to claim 7, characterized in that, At least two first sealing waves are provided on the first abutting section, arranged along the insertion direction, and the first sealing waves protrude toward the outer wall surface of the male end; At least two second sealing waves are provided on the second abutting section, arranged along the insertion direction, and the second sealing waves protrude toward the inner wall surface of the female insertion end.

9. The exhaust system sealing and anti-deflection structure according to any one of claims 1-4, characterized in that, The first inner flow channel of the first exhaust manifold and the second inner flow channel of the second exhaust manifold are coaxial in cross-section and have the same area.

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