Sealing and anti-deflection structure of exhaust system

Abstract

The invention 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, and the first exhaust manifold is provided with a male insertion end; the second exhaust manifold is provided with a female insertion end matched with the male insertion end in an inserted mode, and a plurality of positioning grooves are formed in the inner wall of the female insertion end. The double-wave sealing ring is abutted between the male plug end and the female plug end, and the double-wave sealing ring is of an arc-shaped structure with an asymmetric inner wall surface and an asymmetric outer wall surface; the multiple anti-deflection devices and the multiple positioning grooves are arranged in a one-to-one correspondence mode, one ends of the anti-deflection devices are connected with the outer wall face of the double-wave sealing ring, and the other ends of the anti-deflection devices elastically abut against the positioning grooves after extending in the radial direction of the second exhaust manifold. Deflection of the sealing ring in the assembling process and the running process is avoided, and reliability is high.

Description

Technical Field

[0001] The invention relates to the technical field of exhaust manifold devices, and in particular to an exhaust system sealing and anti-deflection structure. Background Art

[0002] In the field of medium and heavy-duty diesel engines, the current engine exhaust manifold mainly adopts a segmented plug-in structure. For the sealing form of the segmented plug-in structure, most of them adopt sealing ring sealing or light tube thermal expansion structure. The light tube thermal expansion structure has extremely strict requirements on the matching clearance of the exhaust manifold, and too small matching clearance can easily cause the exhaust manifold to crack. Therefore, the sealing ring structure is widely used in the field of diesel engines. At present, there are two structures of sealing ring structure. One is a simple open ring structure. The structure is simple, but it is very easy to cause air leakage in the early stage of engine operation, and the air leakage will become more and more obvious with the passage of time. Therefore, this technology has been basically eliminated. The other sealing ring structure is the most commonly 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. The exhaust temperature of the engine can reach 700 degrees and the exhaust pressure can reach 3.5 bar. The exhaust temperature and pre-turbine pressure will also vary greatly under different working conditions. Closed sealing ring structures such as V-rings are prone to ring body deflection during the initial assembly process and during engine operation, causing the interference fit sealing surface between the V-ring and the exhaust manifold to fail, resulting in exhaust system leakage, affecting engine efficiency, and causing engine thermal hazards. In more serious cases, it can cause the engine to catch fire and affect personal safety. Therefore, it is particularly important to solve the problem of sealing ring deflection. Summary of the invention

[0004] The present invention provides an exhaust system sealing and anti-deflection structure, which is used to solve the defect of the closed sealing ring structure in the prior art that the ring body is prone to deflection during the initial assembly process and during the operation of the engine, thereby avoiding the deflection of the sealing ring during the assembly process and the operation process, and having high reliability.

[0005] The present invention provides an exhaust system sealing and anti-deflection structure, comprising: a first exhaust manifold having a male spigot end; A second exhaust manifold, the second exhaust manifold having a female plug end plugged with the male plug end, and a plurality of positioning grooves are provided on the inner wall of the female plug end; A double-wave sealing ring, the double-wave sealing ring abuts between the male plug end and the female plug end, and the double-wave sealing ring is arranged in an asymmetric arc structure with inner and outer wall surfaces; A plurality of anti-deflection devices are provided corresponding to the plurality of positioning grooves one by one, one end of the anti-deflection device is connected to the outer wall surface of the double-wave sealing ring, and the other end extends along the radial direction of the second exhaust manifold and elastically abuts against the positioning groove.

[0006] According to an exhaust system sealing and anti-deflection structure provided by the present invention, the anti-deflection device includes a guide seat, an elastic member, 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 cooperates with the outer pin, the end of the outer pin away from the guide seat is connected to the positioning boss, the positioning boss is abutted against the positioning groove, the elastic member is sleeved on the outer peripheral side of the guide seat and the outer pin, one end of the elastic member is connected to the outer wall surface of the double-wave sealing ring, and the other end is connected to the positioning boss.

[0007] According to an exhaust system sealing and anti-deflection structure provided by the present invention, a support base is provided on the double-wave sealing ring at positions corresponding to the multiple anti-deflection devices, and the guide seat is fixedly connected to the support base.

[0008] According to an exhaust system sealing and anti-deflection structure provided by the present invention, the end of the positioning boss away from one end of the outer pin is an arc structure, and the positioning boss has two opposite sides along the plug-in direction, one side is an anti-deflection positioning plane structure, and the other side is an arc surface and an anti-deflection positioning plane structure.

[0009] According to an exhaust system sealing and anti-deflection structure provided by the present invention, a limiting hole is provided on the side of the outer pin facing the inner pin, and a limiting boss is provided on the end of the inner pin extending into the outer pin, and the limiting boss cooperates with the limiting hole to limit the guiding of the outer pin and the inner pin.

[0010] According to an exhaust system sealing and anti-deflection structure provided by the present invention, a rounded corner structure is provided at the periphery of the notch of the positioning groove.

[0011] According to an exhaust system sealing and anti-deflection structure provided by the present invention, the number of the anti-deflection devices is four, the number of the positioning grooves is four, the four anti-deflection devices are evenly arranged on the outer wall surface of the double-wave sealing ring along the circumference of the double-wave sealing ring, the four positioning grooves are evenly arranged on the inner wall of the female plug end along the circumference of the female plug end, and the corresponding anti-deflection devices and positioning grooves are in the same radial direction.

[0012] According to an exhaust system sealing and anti-deflection structure provided by the present invention, the double-wave sealing ring includes a first abutment section, a connecting section and a second abutment section which are connected in sequence, the first abutment section and the second abutment section are bent toward the second exhaust manifold relative to the connecting section along the plug-in direction, the first abutment section is abutted against the outer wall surface of the male plug end, and the second abutment section is abutted against the inner wall surface of the female plug end.

[0013] According to an exhaust system sealing and anti-deflection structure provided by the present invention, at least two first sealing waves arranged along the plugging direction are provided on the first abutting section, and the first sealing waves are protruding toward the outer wall surface of the male plug end; At least two second sealing waves arranged along the plugging direction are arranged on the second abutting section, and the second sealing waves are protruded toward the inner wall surface of the female plug end.

[0014] According to an exhaust system sealing and anti-deflection structure provided by the present invention, the cross-sections of the first inner flow channel of the first exhaust manifold and the second inner flow channel of the second exhaust manifold are coaxial and are arranged with equal areas.

[0015] The exhaust system sealing and anti-deflection structure provided by the present invention ensures that the sealing ring maintains a stable shape and position when subjected to internal and external pressure by setting the double-wave sealing ring in an asymmetric arc structure on the inner and outer walls, thereby reducing the deflection caused by uneven pressure. The asymmetric design can also provide better sealing performance, because the sealing surface can be adjusted according to the actual pressure distribution; at the same time, multiple anti-deflection devices are set in a one-to-one correspondence with multiple positioning grooves to ensure that each anti-deflection device can be accurately positioned in the corresponding positioning groove, thereby providing uniform support and fixation for the sealing ring in the radial direction, preventing the sealing ring from deflecting during assembly and operation. Among them, one end of the anti-deflection device is connected to the outer wall of the double-wave sealing ring, and the other end is elastically abutted against the positioning groove after extending along the radial direction of the second exhaust manifold, so that the anti-deflection device can 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 the occurrence of deflection. In this way, the present application can avoid deflection of the sealing ring during assembly and operation, improve the reliability of the sealing system, reduce the risk of air leakage caused by deflection of the sealing ring, and thus improve the overall performance and safety of the engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a front view of an exhaust system sealing and anti-deflection structure provided by the present invention.

[0018] Figure 2 It is a left view of an exhaust system sealing and anti-deflection structure provided by the present invention.

[0019] Figure 3 It is a partial enlarged view of an exhaust system sealing and anti-deflection structure provided by the present invention.

[0020] Figure 4 It is a partial enlarged view of the anti-deflection device provided by the present invention.

[0021] Reference numerals: 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 member; 7. Inner pin; 8. Outer pin; 9. Positioning boss. DETAILED DESCRIPTION

[0022] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0023] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and 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 devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limitations on the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0024] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0025] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0026] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. 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 embodiment of the present invention. In this specification, the schematic representations 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 any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0027] Combine the following Figures 1 to 4 , the exhaust system sealing and anti-deflection structure provided by the embodiment of the present invention is described in detail through specific embodiments and their application scenarios.

[0028] In the embodiment of the present invention, 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 a plurality of anti-deflection devices, the first exhaust manifold 1 has a male plug end; the second exhaust manifold 2 has a female plug end which is plugged into the male plug end, and a plurality of positioning grooves 23 are provided on the inner wall of the female plug end; the double-wave sealing ring 3 abuts between the male plug end and the female plug end, and the double-wave sealing ring 3 is arranged in an asymmetric arc structure on the inner and outer wall surfaces; a plurality of anti-deflection devices are arranged in a one-to-one correspondence with a plurality of 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 along the radial direction of the second exhaust manifold 2 and elastically abuts against the positioning groove 23.

[0029] The male plug end of the first exhaust manifold 1 is a part of the exhaust manifold and is used to be plugged and matched with the female plug end of the second exhaust manifold 2. It provides a connection interface so that the two manifolds can be quickly and firmly connected together.

[0030] The second exhaust manifold 2 has a female plug end that is plugged into the male plug end, and a plurality of positioning grooves 23 are provided on the inner wall of the female plug end. The female plug end cooperates with the male plug end of the first exhaust manifold 1 to achieve the connection between the two manifolds. The positioning grooves 23 are used to correspond to the anti-deflection device to ensure that the sealing ring maintains the correct position after assembly to prevent deflection.

[0031] Specifically, the first exhaust manifold 1 is provided with an inner step 11, an outer step 12, and a first inner flow channel 13. A chamfer is provided at the right end face of the outer step 12, and a chamfer is provided at the left end face of the inner step 11. The inner step 11 extends into the inner hole 21, and the outer step 12 extends into the outer hole 22. A chamfer is provided at the right end face of the inner step 11. 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, 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.

[0032] A chamfered 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 a chamfer are provided on the left end face of the second exhaust manifold 2. A chamfer and a chamfer are provided on the left end face of the inner hole 21, which play a guiding role when the first exhaust manifold 1 is assembled. Four positioning grooves 23 evenly distributed at 90° along the circumferential direction are used to position the sealing ring anti-deflection device. The positioning groove 23 is provided with a chamfered structure to facilitate the assembly of the double-wave sealing ring 3 and prevent damage to the sealing ring sealing wave 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 unevenness on the sealing ring.

[0033] A chamfer is provided at the right end face of the outer step 12, and a chamfer is provided at the right end face of the inner step 11, which can improve the convenience of assembly and facilitate the guidance when the exhaust manifold is plugged in. A chamfer structure is provided at the left end face of the inner step 11 to reduce the thermal stress of the exhaust manifold and reduce 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 margin can effectively reduce the risk of thermal cracking of the exhaust manifold and reduce the leakage of the exhaust manifold.

[0034] The double-wave sealing ring 3 is abutted between the male plug end and the female plug end, and is arranged in an asymmetric arc structure with inner and outer wall surfaces. The asymmetric arc structure can adapt to the pressure difference between the exhaust manifolds and maintain the sealing performance. The double-wave design increases the contact area of ​​the sealing surface and improves the sealing effect. When subjected to internal and external pressure, this structure helps to maintain the stability of the sealing ring and reduce deflection.

[0035] Multiple anti-deflection devices are arranged in a one-to-one correspondence with multiple positioning grooves 23, one end of which is connected to the outer wall surface of the double-wave sealing ring 3, and the other end of which elastically abuts against the positioning groove 23 after extending along the radial direction of the second exhaust manifold 2. The main function of the anti-deflection device is to fix the double-wave sealing ring 3 to prevent it from deflecting during assembly and operation. Through elastic cooperation with the positioning groove 23, the anti-deflection device provides radial support for the sealing ring to ensure 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.

[0036] The present application sets the double-wave sealing ring 3 in an asymmetric arc structure on the inner and outer walls to ensure that the sealing ring maintains a stable shape and position when subjected to internal and external pressure, thereby reducing the deflection caused by uneven pressure. The asymmetric design can also provide better sealing performance, because the sealing surface can be adjusted according to the actual pressure distribution; at the same time, multiple anti-deflection devices are set in a one-to-one correspondence with multiple positioning grooves 23 to ensure that each anti-deflection device can be accurately positioned in the corresponding positioning groove 23, thereby providing uniform support and fixation for the sealing ring in the radial direction to prevent the sealing ring from deflecting during assembly and operation. Among them, 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 along the radial direction of the second exhaust manifold 2 and elastically abuts against the positioning groove 23, so that the anti-deflection device can 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 the occurrence of deflection. In this way, the present application can avoid deflection of the sealing ring during assembly and operation, improve the reliability of the sealing system, reduce the risk of air leakage caused by deflection of the sealing ring, and thus improve the overall performance and safety of the engine.

[0037] Reference Figure 3 and Figure 4 According to an exhaust system sealing and anti-deflection structure provided by the present invention, the anti-deflection device includes a guide seat 5, an elastic member 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 cooperates 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, and the positioning boss 9 is abutted against the positioning groove 23. The elastic member 6 is sleeved on the outer peripheral side of the guide seat 5 and the outer pin 8. One end of the elastic member 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.

[0038] It can be understood that the guide seat 5 is fixedly connected to the outer wall surface of the double-wave sealing ring 3. The guide seat 5 provides a stable support point for the anti-deflection device. It is fixed on the outer wall surface of the sealing ring, ensuring the positioning accuracy and stability of the entire anti-deflection device.

[0039] The elastic member 6 is sleeved on the outer peripheral side of the guide seat 5 and the outer pin 8, one end of which 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. The elastic member 6 is a key component in the anti-deflection device, which provides the necessary elastic force to keep the sealing ring in the correct position. During assembly and operation, the elastic member 6 can adapt to a certain displacement while keeping the sealing ring fixed to prevent it from deflecting.

[0040] 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 to cooperate with the outer pin 8. The inner pin 7 plays a role in transmitting force and movement. Its cooperation with the guide seat 5 and the outer pin 8 ensures that the various parts of the anti-deflection device can work together to form a stable support structure.

[0041] 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 guided and matched with the inner pin 7. The outer pin 8 is a bridge connecting the inner pin 7 and the positioning boss 9. It connects the guide seat 5 and the positioning boss 9 by matching with the inner pin 7, forming a movable but controlled mechanical connection.

[0042] The positioning boss 9 is arranged in abutment with the positioning groove 23 and connected with the outer pin 8. The positioning boss 9 is a part of the anti-deflection device for precise positioning. It abuts with the positioning groove 23 of the female plug end of the exhaust manifold to ensure the correct position of the anti-deflection device in the radial direction, thereby preventing the deflection of the sealing ring.

[0043] Reference Figure 3 and Figure 4 According to an exhaust system sealing and anti-deflection structure provided by the present invention, a support base 4 is arranged at the position of the double-wave sealing ring 3 corresponding to multiple anti-deflection devices, and a guide seat 5 is fixedly connected to the support base 4.

[0044] It can be understood that the double wave sealing ring 3 is provided with a support base 4 at positions corresponding to the multiple anti-deflection devices. The support base 4 helps to maintain the shape and position of the double wave sealing ring 3, especially when subjected to internal and external pressures, it can prevent the sealing ring from deforming and deflecting. The cooperation between the support base 4 and the anti-deflection device ensures the correct position of the sealing ring in the exhaust manifold.

[0045] The guide seat 5 is fixedly connected to the support base 4. The fixed connection of the guide seat 5 ensures the correct guidance of the anti-deflection device on the sealing ring, so that the anti-deflection device can be accurately aligned with the positioning groove 23 of the exhaust manifold. Through the 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 to prevent deviation.

[0046] Reference Figure 4According to an exhaust system sealing and anti-deflection structure provided by the present invention, the end of the positioning boss 9 away from one end of the outer pin 8 is an arc structure, and the positioning boss 9 has two opposite sides along the plug-in 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.

[0047] It is understandable that the end of the positioning boss 9 away from the outer pin 8 is an arc structure. The arc structure helps to reduce stress concentration when the positioning boss 9 contacts the positioning groove 23, thereby reducing wear or damage caused by excessive contact pressure. The arc shape makes it easier to insert and remove the positioning boss 9 during assembly and maintenance, improving the convenience of assembly.

[0048] One of the two opposite sides of the positioning boss 9 along the plugging direction is an anti-deflection positioning plane structure. The plane structure provides precise alignment with the exhaust manifold female plug end positioning groove 23, 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 solid support surface, so that the sealing ring remains stable when subjected to internal and external pressure.

[0049] The other side of the positioning boss 9 is an arcuate surface and an anti-deflection positioning plane structure. The arcuate surface can provide a certain elastic compensation, so that the anti-deflection device can adapt to the slight displacement between the exhaust manifold and the sealing ring. At the same time, the arcuate surface helps to evenly distribute the pressure to the entire contact surface of the positioning groove 23, thereby improving the reliability of the seal and reducing local wear.

[0050] Reference Figure 4 According to an 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 on the end of the inner pin 7 extending into the outer pin 8. The limiting boss cooperates with the limiting hole to limit the guiding of the outer pin 8 and the inner pin 7.

[0051] It can be understood that a limiting hole is provided on the side of the outer pin 8 facing the inner pin 7. The limiting hole provides a precise guide path for the inner pin 7, ensuring that the inner pin 7 can be correctly aligned when inserted into the outer pin 8, thereby maintaining the accuracy and stability of the entire anti-deflection device. The limiting hole limits the excessive displacement of the inner pin 7 in the outer pin 8, preventing the anti-deflection device from failing due to excessive movement.

[0052] A limiting boss is provided at one end of the inner pin 7 extending into the outer pin 8. The limiting boss cooperates with the limiting hole of the outer pin 8 to achieve accurate positioning of the inner pin 7 in the outer pin 8, ensuring that the various components of the anti-deflection device can be correctly matched according to the design requirements.

[0053] The cooperation between the limiting boss and the limiting hole limits the relative movement between the inner pin 7 and the outer pin 8, ensuring that when the anti-deflection device is working, the inner pin 7 and the outer pin 8 can move along a predetermined path without excessive displacement.

[0054] Reference Figure 3 and Figure 4 According to an exhaust system sealing and anti-deflection structure provided by the present invention, a chamfered structure is provided at the periphery of the notch of the positioning groove 23 .

[0055] It can be understood that the rounded corner structure of the periphery of the notch of the positioning groove 23 plays multiple roles in the exhaust system sealing and anti-deflection structure, namely, improving assembly convenience, enhancing structural durability, improving sealing performance and optimizing the maintenance process.

[0056] Reference Figure 2 According to an exhaust system sealing and anti-deflection structure provided by the present invention, the number of anti-deflection devices is four, the number of positioning grooves 23 is four, the four anti-deflection devices are evenly arranged on the outer wall surface of the double-wave sealing ring 3 along the circumference of the double-wave sealing ring 3, the four positioning grooves 23 are evenly arranged on the inner wall of the female plug end along the circumference of the female plug end, and the corresponding anti-deflection devices and positioning grooves 23 are in the same radial direction.

[0057] It can be understood that the four anti-deflection devices evenly distributed along the circumference of 90° provided on the double-wave sealing ring 3 cooperate with the four positioning grooves 23 of the second exhaust manifold 2 evenly distributed along the circumference of 90° to achieve multi-directional positioning and avoid the problem of insufficient anti-deflection ability caused by single positioning. In this way, the anti-deflection of the double-wave sealing ring 3 is achieved and the reliability of the anti-deflection is guaranteed. At the same time, the uniform layout also helps to keep the gap between the double-wave sealing ring 3 and the female plug consistent, thereby improving the sealing performance and reducing the risk of leakage.

[0058] Reference Figure 1 According to an exhaust system sealing and anti-deflection structure provided by the present invention, a double-wave sealing ring 3 includes a first abutting section, a connecting section and a second abutting section which are 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 plug-in direction. The first abutting section is abutted against the outer wall surface of the male plug end, and the second abutting section is abutted against the inner wall surface of the female plug end.

[0059] It can be understood that the first abutting section and the second abutting section are bent relative to the connecting section along the plugging direction, so that the two abutting sections can better fit the surfaces of the male plug end and the female plug end. When the male plug end and the female plug end are plugged, the first abutting section tightly abuts against the outer wall surface of the male plug end, and the second abutting section tightly abuts against the inner wall surface of the female plug end, thereby forming two sealing lines and enhancing the sealing effect.

[0060] Reference Figure 1According to an exhaust system sealing and anti-deflection structure provided by the present invention, at least two first sealing waves arranged along the plug-in direction are arranged on the first abutting section, and the first sealing waves are protruded toward the outer wall surface of the male plug end; at least two second sealing waves arranged along the plug-in direction are arranged on the second abutting section, and the second sealing waves are protruded toward the inner wall surface of the female plug end.

[0061] It can be understood that the setting of the first sealing wave and the second sealing wave increases the sealing contact surface, making the seal tighter. The first sealing wave protrudes toward the outer wall surface of the male plug end, and the second sealing wave protrudes toward the inner wall surface of the female plug end, so as to ensure that during the plug-in process, the sealing wave can fit tightly on the corresponding wall surface to form an effective sealing line. Multiple sealing waves are arranged along the plug-in direction to form multiple sealing barriers. Even if one of the sealing waves has a small leak for some reason, the other sealing waves can still maintain the seal, thereby improving the overall sealing reliability.

[0062] Reference Figure 1 The cross sections of 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 and are arranged with equal areas.

[0063] It can be understood that the coaxial and equal-area flow channel design ensures the continuity and consistency of the gas flow when passing through the first exhaust manifold 1 and the second exhaust manifold 2, reduces the resistance loss during the flow process, and thus improves the overall efficiency of the exhaust system. The equal-area setting of the flow channel cross section helps to achieve a uniform distribution of the gas flow rate, which helps to reduce the generation of turbulence and eddies, further reduce the flow resistance, and improve the performance of the exhaust system.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An exhaust system sealing and anti-deflection structure, characterized in that: include: a first exhaust manifold having a male spigot end; A second exhaust manifold, the second exhaust manifold having a female plug end plugged with the male plug end, and a plurality of positioning grooves are provided on the inner wall of the female plug end; A double-wave sealing ring, the double-wave sealing ring abuts between the male plug end and the female plug end, and the double-wave sealing ring is arranged in an asymmetric arc structure with inner and outer wall surfaces; A plurality of anti-deflection devices are provided corresponding to the plurality of positioning grooves one by one, one end of the anti-deflection device is connected to the outer wall surface of the double-wave sealing ring, and the other end extends along the radial direction of the second exhaust manifold and elastically abuts against the positioning groove.

2. The exhaust system sealing and anti-deflection structure according to claim 1, characterized in that: The anti-deflection device includes a guide seat, an elastic member, 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 cooperates with the outer pin. The end of the outer pin away from the guide seat is connected to the positioning boss, and the positioning boss is abutted against the positioning groove. The elastic member is sleeved on the outer peripheral side of the guide seat and the outer pin, one end of the elastic member is connected to the outer wall surface of the double-wave sealing ring, and the other end is connected to the positioning boss.

3. The exhaust system sealing and anti-deflection structure according to claim 2, characterized in that: The double-wave sealing ring is provided with a support base at positions corresponding to the multiple anti-deflection devices, and the guide seat is fixedly connected to the support base.

4. The exhaust system sealing and anti-deflection structure according to claim 2, characterized in that: The end of the positioning boss away from one end of the outer pin is an arc structure, and the positioning boss has two opposite sides along the plug-in 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.

5. The exhaust system sealing and anti-deflection structure according to claim 2, characterized in that: A limiting hole is provided on the side of the outer pin facing the inner pin, and a limiting boss is provided on the end of the inner pin extending into the outer pin. The limiting boss cooperates with the limiting hole to limit the guiding of the outer pin and the inner pin.

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

7. The exhaust system sealing and anti-deflection structure according to any one of claims 1 to 5, characterized in that: The number of the anti-deflection devices is four, and the number of the positioning grooves is four. The four anti-deflection devices are evenly arranged 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 arranged on the inner wall of the female plug end along the circumference of the female plug end. The corresponding anti-deflection devices and positioning grooves are in the same radial direction.

8. The exhaust system sealing and anti-deflection structure according to any one of claims 1 to 5, characterized in that: The double-wave sealing ring includes a first abutment section, a connecting section, and a second abutment section which are connected in sequence. The first abutment section and the second abutment section are bent toward the second exhaust manifold relative to the connecting section along the plug-in direction. The first abutment section is abutted against the outer wall surface of the male plug end, and the second abutment section is abutted against the inner wall surface of the female plug end.

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

10. The exhaust system sealing and anti-deflection structure according to any one of claims 1 to 5, 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 are arranged with equal areas.

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