Exhaust pipe structure

Abstract

The application provides an exhaust pipe structure, which comprises an exhaust manifold having an inlet pipe and an outlet pipe in communication with each other, and further comprises: a partition structure arranged in the outlet pipe to separate the outlet pipe into a first flow channel and a second flow channel; and a split groove arranged at least partially on the partition structure and located at a pipe opening of the outlet pipe, wherein the split groove comprises a first part and a second part connected in sequence, and the width of the first part in the arrangement direction of the first flow channel and the second flow channel is constant along the extension direction of the outlet pipe, and the width of the second part in the arrangement direction of the first flow channel and the second flow channel gradually increases. The problem that the flange forms multiple-point low-cycle fatigue cracks in a short time due to the out-of-synchronization of thermal deformation between the flange and the intermediate partition structure caused by high-temperature exhaust gas, and further causes exhaust pipe leakage, is solved.

Description

Technical Field

[0001] This invention relates to the field of engine technology, and more specifically, to an exhaust pipe structure. Background Technology

[0002] The engine exhaust system is an indispensable component of modern engines. Its main function is to collect and exhaust the high-temperature exhaust gases generated during engine operation, ensuring normal engine operation and environmental protection. As engine performance continues to improve, the temperature of the exhaust gases produced during engine operation also increases, which places higher demands on the reliability of exhaust systems, especially dual-flow exhaust pipes.

[0003] In existing technologies, dual-flow exhaust pipes typically consist of two exhaust channels, a flange, and an intermediate partition. The function of the intermediate partition is to separate the high-temperature exhaust gases from the two channels, preventing them from mixing within the flange area.

[0004] However, this design has a significant drawback in practical applications: the intermediate partition is simultaneously heated by two streams of high-temperature exhaust gases, causing its temperature change rate to be significantly higher than other areas of the flange. Due to the thermal expansion effect caused by temperature changes, the thermal deformation between the intermediate partition and the flange will be asynchronous, resulting in substantial thermal stress. This thermal stress accumulates at the flange opening, easily causing the flange to develop multiple low-cycle fatigue cracks in a short period of time, ultimately leading to exhaust pipe leakage, affecting engine performance, and potentially even damaging the engine, severely impacting user experience and engine lifespan. Summary of the Invention

[0005] The main objective of this invention is to provide an exhaust pipe structure to solve the problem in the prior art where the intermediate partition plate, after being exposed to high-temperature exhaust gas, undergoes asynchronous thermal deformation with the flange, resulting in the flange forming multiple low-cycle fatigue cracks in a short period of time, which in turn leads to exhaust pipe leakage.

[0006] To achieve the above objectives, according to one aspect of the present invention, an exhaust pipe structure is provided, the exhaust pipe structure including an exhaust manifold having an intake pipe and an exhaust pipe communicating with each other, and the exhaust pipe structure further including:

[0007] A baffle structure is installed inside the air outlet pipe to divide the air outlet pipe into a relatively independent first flow channel and a second flow channel;

[0008] The dividing groove is at least partially provided on the partition structure and located at the outlet of the air duct;

[0009] The dividing groove includes a first section and a second section connected in sequence. Along the extension direction of the air outlet pipe, the width of the first section remains unchanged in the arrangement direction of the first flow channel and the second flow channel, while the width of the second section gradually increases in the arrangement direction of the first flow channel and the second flow channel.

[0010] Furthermore, the partition structure includes an intermediate partition plate disposed at the outlet of the air outlet pipe, a dividing groove disposed at the end of the intermediate partition plate away from the air inlet pipe, and the opening of the dividing groove being disposed away from the air inlet pipe.

[0011] Furthermore, the partition structure also includes:

[0012] A baffle is installed on the dividing groove to divide the outlet of the air pipe into a first outlet and a second outlet. The first outlet is connected to the first flow channel, and the second outlet is connected to the second flow channel.

[0013] Furthermore, a fixing groove is provided on the bottom of the dividing groove so as to fix the baffle to the outlet of the air pipe through the fixing groove, so as to divide the outlet of the air pipe into a first outlet and a second outlet.

[0014] Furthermore, the fixing groove is an arc-shaped groove, and the opening of the fixing groove is set away from the dividing groove. The baffle is an arc-shaped plate, and the baffle is fitted with the fixing groove with a clearance so as to fix the baffle through the fixing groove.

[0015] Furthermore, the exhaust pipe structure also includes:

[0016] A flange is installed at the outlet end of the gas outlet pipe;

[0017] At least one unloading groove, at least a portion of which is disposed on the side of the flange away from the outlet pipe, the unloading groove being located above the dividing groove.

[0018] Furthermore, at least one unloading groove is an arc-shaped groove, and the opening of at least one unloading groove is disposed away from the flange;

[0019] The unloading groove is connected to the dividing groove. The intersection of the unloading groove and the dividing groove forms the first unloading edge. The intersection of the unloading groove and the flange forms the second unloading edge. The plane on which the first unloading edge is located on the dividing groove is the first plane. The plane on which the second unloading edge is located on the flange is the second plane. The first plane and the second plane intersect.

[0020] Furthermore, the first unloading edge is an arc-shaped edge, and its opening is positioned away from the exhaust pipe; and / or,

[0021] The second unloading edge is an arc edge, and its opening is set towards the air outlet pipe.

[0022] Furthermore, the exhaust pipe structure also includes a flange, which is located at the outlet end of the exhaust pipe;

[0023] The flange has a length of W along the arrangement direction of the first and second flow channels, and the fixing groove is a semi-circular groove with a radius of R.

[0024] Where R = W / 2.

[0025] Furthermore, the exhaust pipe structure also includes a flange, which is located at the outlet end of the exhaust pipe, and the plane on the side of the flange away from the outlet end of the exhaust pipe is the third plane.

[0026] Along the extension direction of the air outlet pipe, the distance between the bottom of the fixed groove and the third plane is H1;

[0027] Wherein, 1.05R≤H1≤1.30R.

[0028] Furthermore, the exhaust pipe structure also includes a flange, which is installed at the outlet end of the exhaust pipe;

[0029] The width of the first section of the dividing groove along the arrangement direction of the first and second flow channels is W1;

[0030] The width of the flange opening along the arrangement direction of the first and second flow channels is L;

[0031] Among them, 0.8L≤W1≤0.9L.

[0032] Furthermore, the exhaust pipe structure also includes a flange, which is installed at the outlet end of the exhaust pipe;

[0033] The straight-line length of the unloading trough along the arrangement direction of the first and second flow channels is W2;

[0034] The width of the flange opening along the arrangement direction of the first and second flow channels is L;

[0035] Where W2 = 0.2L.

[0036] Furthermore, the exhaust pipe structure also includes a flange, which is located at the outlet end of the exhaust pipe, and the plane on the side of the flange away from the outlet end of the exhaust pipe is the third plane.

[0037] A fixing groove is provided inside the dividing groove;

[0038] The distance between the bottom of the fixed groove and the third plane along the extension direction of the air outlet pipe is H1;

[0039] The length of the unloading groove along the extension of the outlet pipe from the third plane and the second unloading edge is H2;

[0040] Where 0.1H1≤H2≤0.2H1.

[0041] By applying the technical solution of this invention, the design of the first and second sections of the dividing groove, especially the characteristic that the width of the second section gradually increases in the direction of the exhaust pipe extension, can effectively control and disperse the thermal stress caused by high-temperature exhaust gas. The first section ensures a uniform distribution of initial thermal stress, while the design of the gradually increasing width of the second section allows the thermal stress to be gradually released in a wider space, avoiding excessive concentration of thermal stress at a certain point, thereby significantly reducing the risk of fatigue cracks in the flange and diaphragm structure.

[0042] The specific design of the segmented channel, including the connection method between the first and second sections, not only disperses thermal stress but also optimizes the strength and rigidity of the structure. While managing thermal stress, it maintains the integrity and support performance of the exhaust duct structure, preventing structural deformation or damage caused by high temperatures and vibrations.

[0043] By incorporating dividing slots in the partition structure, particularly ensuring precise connection between the first and second sections, assembly accuracy is enhanced, guaranteeing accurate separation of the first and second flow channels. This design reduces assembly errors, strengthens the overall reliability of the exhaust pipe structure, and prevents increased thermal stress and performance degradation caused by improper component alignment.

[0044] The design of the dividing channel ensures controlled exhaust gas flow between the first and second flow channels, effectively preventing exhaust gas mixing. This helps improve thermal management performance, allowing the exhaust gases in the two independent flow channels to flow more independently under high-temperature conditions, reducing the impact of thermal stress on the flow channel separation effect, and improving engine operating efficiency and stability.

[0045] The segmented design reduces thermal stress damage to the baffle structure, lowering maintenance frequency and costs. Simultaneously, this design enhances the safety of the exhaust system, preventing structural failure and high-temperature exhaust gas leakage caused by thermal stress, thus ensuring long-term stable engine operation and user safety.

[0046] This segmented groove design can adapt to the requirements of different engine exhaust systems and has good application potential for exhaust pipes of various sizes and structures. This improves the adaptability and versatility of the technical solution, enabling the effects of thermal stress control and structural strength optimization to be widely applied to different types of engine exhaust manifolds. Attached Figure Description

[0047] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0048] Figure 1 A schematic diagram of the overall structure of the exhaust pipe structure according to an embodiment of this application is shown;

[0049] Figure 2 A schematic diagram of the fixing groove on the exhaust pipe structure according to an embodiment of this application is shown;

[0050] Figure 3 This application shows a schematic diagram illustrating the dimensions of various parts of the exhaust pipe structure according to an embodiment of the present application;

[0051] Figure 4 A schematic diagram of the internal structure of the exhaust pipe structure according to an embodiment of this application is shown;

[0052] Figure 5 A cross-sectional view of an exhaust pipe structure according to an embodiment of this application is shown.

[0053] The above figures include the following reference numerals:

[0054] 10. Exhaust manifold; 101. Intake pipe; 102. Exhaust pipe; 20. Divider groove; 30. Baffle; 40. Fixing groove; 50. Flange; 60. Unloading groove; 601. First unloading edge; 602. Second unloading edge. Detailed Implementation

[0055] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0056] The main objective of this application is to provide an exhaust pipe structure that addresses the above-mentioned problems, including:

[0057] The exhaust manifold 10 has an intake pipe 101 and an exhaust pipe 102 that are interconnected. The exhaust pipe structure also includes:

[0058] A baffle structure is installed inside the air outlet pipe 102 to divide the air outlet pipe 102 into a relatively independent first flow channel and a second flow channel;

[0059] The dividing groove 20 is at least partially provided on the partition structure and located at the opening of the air outlet pipe 102;

[0060] The dividing groove 20 includes a first section and a second section connected in sequence. Along the extension direction of the air outlet pipe 102, the width of the first section remains unchanged in the arrangement direction of the first flow channel and the second flow channel, while the width of the second section gradually increases in the arrangement direction of the first flow channel and the second flow channel.

[0061] like Figure 1As shown, the exhaust pipe structure provided in this application includes an exhaust manifold 10, which has two intake pipes 101 for connecting to two cylinders of the engine. The exhaust manifold 10 also has an exhaust pipe 102 for connecting to a turbocharger. The exhaust pipe structure further includes a baffle structure disposed within the exhaust pipe 102, which divides the exhaust pipe 102 into a first flow channel and a second flow channel. A dividing groove 20 is provided on the baffle structure, which includes a first portion and a second portion, as detailed below. Figure 2 , Figure 3 and Figure 5 As shown, it can be seen that along the extension direction of the exhaust pipe 102, the width of the first portion remains unchanged in the arrangement direction of the first and second flow channels, while the width of the second portion gradually increases in the arrangement direction of the first and second flow channels. The extension direction of the exhaust pipe 102, in... Figure 5 The middle section is in the direction from bottom to top. By setting the dividing groove 20, the unevenness of the thermal stress at the outlet of the exhaust manifold 10 can be reduced, which can prevent the exhaust manifold 10 from cracking and breaking due to uneven thermal stress, thus preventing the leakage of high-temperature exhaust gas from the engine.

[0062] By incorporating a segmented groove 20 with a specific shape on the partition structure—comprising a first segment with a constant width and a second segment with a gradually increasing width—the unevenness of thermal stress at the exhaust manifold 10 inlet can be significantly reduced. This design effectively avoids cracking and rupture at the exhaust manifold 10 inlet caused by uneven thermal stress distribution, thereby greatly reducing the risk of high-temperature exhaust gas leakage from the engine and improving the overall reliability and service life of the exhaust pipe structure.

[0063] Specifically, the first section with a constant width and the second section with a gradually increasing width work together to disperse the thermal stress caused by the high-temperature exhaust gas, reduce the stress concentration area, and prevent the initiation and propagation of cracks.

[0064] By optimizing the size and shape of the dividing groove 20, the structural stability of the exhaust manifold 10 port is enhanced, effectively preventing port deformation and cracking even under harsh operating conditions of long-term exposure to high-temperature exhaust gas and thermal shock.

[0065] Preventing cracks and splits in the manifold openings reduces the need for repairs or replacements of the engine exhaust system due to malfunctions, thereby lowering maintenance costs and increasing user satisfaction.

[0066] This prevents high-temperature exhaust gas leakage, ensures the normal operation of the engine exhaust system, helps maintain engine performance and efficiency, and avoids performance degradation caused by exhaust system failure.

[0067] Furthermore, the partition structure includes an intermediate partition plate disposed at the inlet of the air outlet pipe 102, and a dividing groove 20 disposed at the end of the intermediate partition plate away from the air inlet pipe 101, with the opening of the dividing groove 20 facing away from the air inlet pipe 101. Furthermore, the partition structure also includes:

[0068] A baffle 30 is provided on the dividing groove 20 to divide the outlet of the air pipe 102 into a first outlet and a second outlet. The first outlet is connected to the first flow channel, and the second outlet is connected to the second flow channel.

[0069] like Figure 1 As shown, the baffle structure includes a middle baffle, which is disposed inside the exhaust pipe 102, dividing the exhaust pipe 102 into a relatively independent first flow channel and a second flow channel. Based on the middle baffle, a dividing groove 20 is provided, and a baffle 30 is provided on the dividing groove 20, which can divide the pipe opening of the exhaust pipe 102 into a first pipe opening and a second pipe opening. The first pipe opening is connected to the first flow channel, and the second pipe opening is connected to the second flow channel. Because of the presence of the baffle 30, the high-temperature exhaust gas in the first flow channel and the high-temperature exhaust gas in the second flow channel can be prevented from mixing due to the presence of the dividing groove 20.

[0070] The design of the dividing groove 20 on the intermediate partition plate, combined with the design of the baffle 30, can effectively reduce the unevenness of thermal stress at the outlet of the air pipe 102. The presence of the dividing groove 20 allows the thermal deformation between the intermediate partition plate and the flange 50 to proceed independently, thereby avoiding cracks and ruptures caused by thermal stress concentration.

[0071] The baffle 30 ensures that the exhaust gas in the first flow channel and the second flow channel can flow independently, avoiding the mixing of high-temperature exhaust gas between the flow channels and maintaining the independence of the flow channels. This is crucial for the operation of the dual-flow channel system, especially in cases where two exhaust gases need to be treated independently (such as in a twin-turbocharged system).

[0072] The dividing groove 20 and the baffle 30 work together to improve the structural stability and integrity of the exhaust pipe 102 opening. Even when the engine experiences frequent temperature changes during operation, it can effectively prevent the pipe opening from deforming and cracking, thus extending the service life of the exhaust pipe.

[0073] By eliminating the mixing of high-temperature exhaust gases and reducing thermal stress concentration, this solution not only improves the overall performance of the engine exhaust system but also enhances the system's safety, avoiding engine performance degradation and potential safety hazards caused by system malfunctions (such as exhaust gas leaks).

[0074] Furthermore, a fixing groove 40 is provided on the bottom of the dividing groove 20 so as to fix the baffle 30 to the opening of the air outlet pipe 102 through the fixing groove 40, so as to divide the opening of the air outlet pipe 102 into a first opening and a second opening.

[0075] Furthermore, the fixing groove 40 is an arc-shaped groove, and the opening of the fixing groove 40 is set away from the dividing groove 20. The baffle 30 is an arc-shaped plate, and the baffle 30 is clearance-fitted with the fixing groove 40 so as to fix the baffle 30 through the fixing groove 40.

[0076] Specifically, a fixing groove 40 is provided on the bottom of the dividing groove 20. In this embodiment, the fixing groove 40 is in the shape of a semi-circular groove, such as... Figure 2 and Figure 3 As shown, the opening of the fixed groove 40 is positioned away from the dividing groove 20, and the baffle 30 is disposed inside the fixed groove 40. The side of the baffle 30 closest to the fixed groove 40 is arc-shaped, and the curvature of the arc of the baffle 30 is consistent with the curvature of the fixed groove 40. The baffle 30 can be fitted with the fixed groove 40 with a clearance to fix the baffle 30 in place, so as to prevent the high-temperature exhaust gas in the first flow channel from mixing with the high-temperature exhaust gas in the second flow channel. Furthermore, the clearance fit can prevent the baffle 30 from detaching from the fixed groove 40.

[0077] A semi-circular fixing groove 40 is provided at the bottom of the dividing groove 20 to precisely fix the baffle 30, ensuring its stable position and preventing the mixing of high-temperature exhaust gas between the first and second flow channels. This design not only improves the positioning accuracy of the baffle 30, but also ensures its stability and reliability under harsh operating conditions.

[0078] The gap fit between the baffle 30 and the fixing groove 40 ensures the fixation of the baffle 30 and prevents it from falling off under high temperature and vibration conditions. This design effectively avoids system failure and performance degradation caused by the displacement of the baffle 30.

[0079] The combined design of the dividing groove 20 and the fixed groove 40 helps to optimize the distribution of thermal stress and reduce local stress concentration caused by asynchronous thermal deformation, thereby reducing the risk of pipe mouth cracks and cracking and improving the overall reliability of the exhaust pipe.

[0080] The consistency between the arc edge of the baffle 30 and the arc of the fixing groove 40, as well as the use of clearance fit, work together to enhance the structural stability and integrity. Even when the engine experiences frequent temperature changes during operation, it can ensure that the baffle 30 and the fixing groove 40 fit tightly, avoiding structural fatigue and failure.

[0081] By precisely controlling the flow path of high-temperature exhaust gas, exhaust gas mixing is avoided, ensuring that the dual-flow exhaust system can operate efficiently and safely, which plays an important role in improving engine performance and reducing emissions.

[0082] The detachable design of the baffle 30 and the fixing groove 40 makes it convenient and quick to operate when maintenance or replacement of the baffle is required, reducing maintenance costs and time and improving the maintainability of the entire system.

[0083] Furthermore, the exhaust pipe structure also includes:

[0084] Flange 50 is installed at the outlet end of the air outlet pipe 102;

[0085] At least one unloading groove 60, at least a portion of which is disposed on the side of the flange 50 away from the outlet pipe 102, the unloading groove 60 being located above the dividing groove 20.

[0086] Furthermore, at least one unloading groove 60 is an arc-shaped groove, and the opening of at least one unloading groove 60 is disposed away from the flange 50.

[0087] The unloading groove 60 is connected to the dividing groove 20. The intersection of the unloading groove 60 and the dividing groove 20 forms the first unloading edge 601, and the intersection of the unloading groove 60 and the flange 50 forms the second unloading edge 602. The plane on which the first unloading edge 601 is located on the dividing groove 20 is the first plane, and the plane on which the second unloading edge 602 is located on the flange 50 is the second plane. The first plane and the second plane intersect.

[0088] Furthermore, the first unloading edge 601 is an arc-shaped edge, and its opening is positioned away from the exhaust pipe 102; and / or,

[0089] The second unloading edge 602 is an arc edge, and its opening is set towards the air outlet pipe 102.

[0090] Specifically, the exhaust pipe structure also includes a flange 50 disposed at the outlet end of the exhaust pipe 102, and an unloading groove 60 is provided on the flange 50. In this embodiment, there are two unloading grooves 60, which are respectively disposed opposite to each other on the flange 50, that is, the two unloading grooves 60 are symmetrically arranged. The shape of the unloading groove 60 is as follows: Figure 2 and Figure 3 As shown, the opening of each unloading groove 60 is away from the flange 50 and faces each other. As can be seen from the figure, each unloading groove 60 is located above the dividing groove 20, and each unloading groove 60 is connected to the dividing groove 20. Figure 2 and Figure 3 As shown, a first unloading edge 601 is formed at the intersection of the unloading groove 60 and the dividing groove 20. The first unloading edge 601 is an arc edge, and the opening of the first unloading edge 601 is set away from the air outlet pipe 102. A second unloading edge 602 is formed at the intersection of the unloading groove 60 and the flange 50. The second unloading edge 602 is an arc edge, and the opening of the second unloading edge 602 is set towards the air outlet pipe 102.

[0091] The unloading groove 60 on the flange 50 is connected to the dividing groove 20, and the first unloading edge 601 and the second unloading edge 602 formed are both designed with an arc shape. This structure helps to relieve and disperse thermal stress. The presence of the unloading groove 60 allows the flange 50 to have a larger deformation space during thermal expansion, avoiding stress concentration between the flange 50 and the intermediate partition plate, thereby significantly reducing the risk of flange 50 cracking.

[0092] The interconnected design of the unloading groove 60 and the dividing groove 20, along with the use of the arc-shaped unloading edge, helps control the thermal deformation of the flange 50, ensuring structural stability. This design allows the flange 50 to deform more uniformly at high temperatures, reducing structural damage caused by uneven deformation and improving the durability and reliability of the exhaust pipe.

[0093] The symmetrical arrangement of the two unloading grooves 60 not only optimizes the thermal management capability of the exhaust pipe but also improves the uniformity of heat load distribution. This symmetrical design ensures thermal stress balance on both sides of the flange 50, avoids excessive thermal stress on one side, and enhances the thermal stability and thermal efficiency of the entire exhaust pipe.

[0094] By mitigating the thermal stress on flange 50 and the intermediate partition, the likelihood of cracks and leaks during long-term operation is reduced, thereby decreasing the frequency of maintenance and replacement and lowering maintenance costs. Simultaneously, the enhanced structural stability and thermal management capabilities improve the safety performance of the exhaust pipe, reducing engine performance degradation and safety hazards caused by exhaust system malfunctions.

[0095] Furthermore, the exhaust pipe structure also includes a flange 50, which is located at the outlet end of the exhaust pipe 102;

[0096] The length of flange 50 along the arrangement direction of the first and second flow channels is W, and the fixing groove 40 is a semi-circular groove with a radius of R.

[0097] Where R = W / 2.

[0098] By setting the radius R of the fixing groove 40 to be equal to half the length W of the flange 50 along the first and second flow channels (R = W / 2), the precise matching between the fixing groove 40 and the flange 50 structure is ensured. This design optimizes the fixing of the baffle 30 in the fixing groove 40 and also enhances the overall structural stability of the flange 50.

[0099] The ratio between the radius of the fixing groove 40 and the length of the flange 50 helps manage thermal stress under high-temperature operating conditions, ensuring that the connection between the baffle 30 and the flange 50 does not fail due to thermal expansion. The semi-circular design of the fixing groove 40 allows the baffle 30 to better adapt to thermal deformation, reducing thermal stress concentration and extending the service life of the flange 50.

[0100] The precise matching of the dimensions of the fixed groove 40 and the flange 50 enables the baffle 30 to be positioned more accurately during assembly, improving assembly precision and reducing performance degradation and potential failure risks caused by assembly errors.

[0101] The specific design of the fixing groove 40 simplifies the installation and removal process of the baffle 30, making it easy to maintain or replace the baffle when needed without causing additional damage or complicated operations to the entire flange 50 or exhaust pipe structure, thus reducing maintenance costs and time.

[0102] By optimizing the structural relationship between the fixing groove 40 and the flange 50, the fixation of the baffle 30 is enhanced, preventing the mixing of high-temperature exhaust gases and improving the safety and reliability of the exhaust pipe system. At the same time, it reduces structural damage caused by thermal stress, ensuring the long-term stability and high efficiency of the engine operation.

[0103] For flanges 50 of different sizes, by adjusting the radius R of the fixing groove 40 to always be equal to half the length W of the flange 50, the adaptability and versatility of this technical solution in various exhaust pipe structures are ensured, so that the technical effect can be consistently reflected in different application environments.

[0104] Furthermore, flange 50 is provided at the outlet end of the gas outlet pipe 102, and the plane of flange 50 on the side away from the outlet end of the gas outlet pipe 102 is the third plane.

[0105] Along the extension direction of the air outlet pipe, the distance between the bottom of the fixed groove 40 and the third plane is H1;

[0106] Wherein, 1.05R≤H1≤1.30R.

[0107] like Figure 4 As shown, by setting the distance H1 between the bottom of the fixing groove 40 and the plane (third plane) of the flange 50 away from the outlet pipe 102 to be 1.05 to 1.3 times the radius R of the fixing groove, this design can effectively adapt to thermal deformation under high temperature conditions. The specific range of H1 means that the depth of the fixing groove is deep enough to form sufficient space between the baffle 30 and the flange 50 to accommodate thermal deformation, thereby avoiding stress concentration and potential damage between components caused by thermal expansion.

[0108] The specific ratio between H1 and R helps to distribute thermal stress evenly, preventing cracks and splits at the connection between flange 50 and baffle 30 caused by thermal stress. This not only extends the service life of flange 50 but also improves the overall reliability and stability of the exhaust pipe.

[0109] The depth of the fixing groove 40 is controlled between 1.05R and 1.3R, which ensures that the baffle 30 forms a solid connection with the flange 50 after assembly, while maintaining sufficient structural strength so that it can maintain good working condition even when subjected to high temperature and vibration during engine operation.

[0110] The precise distance between the depth of the fixing groove 40 and the plane of the flange 50 simplifies the assembly process of the baffle 30 and ensures assembly accuracy. During maintenance, this specific design also facilitates the inspection and replacement of the baffle, reducing maintenance difficulty and cost.

[0111] By optimizing the ratio between H1 and R, this technical solution significantly improves the safety of the exhaust pipe system, avoids structural failure and high-temperature exhaust gas leakage caused by thermal stress, and ensures the normal operation of the engine and the safety of the user. Furthermore, flange 50 is installed at the outlet end of the exhaust pipe 102;

[0112] The width of the first section of the dividing groove 20 along the arrangement direction of the first flow channel and the second flow channel is W1;

[0113] The width of the flange opening of flange 50 along the arrangement direction of the first and second flow channels is L;

[0114] Among them, 0.8L≤W1≤0.9L.

[0115] The width W1 of the first section of the dividing groove 20 along the flow channel arrangement direction is set to be 0.8 to 0.9 times the width L of the flange opening along the arrangement direction of the first and second flow channels. This design can effectively disperse the thermal stress in the flow channel. The specific range of W1 ensures that the dividing groove 20 has sufficient width to buffer the thermal expansion effect, avoid the concentration of thermal stress in the flange opening area, and thus reduce the risk of crack initiation and propagation.

[0116] The specific proportional relationship between W1 and L helps maintain the structural strength and rigidity of the flange. The appropriate width of the first section of the dividing groove 20 ensures the dispersion of thermal stress while maintaining the robustness of the flange and preventing structural deformation or damage caused by high temperature and vibration.

[0117] By controlling the width of the first section of the dividing groove 20, more precise control of the exhaust gas flow in the first and second flow channels can be achieved, ensuring that the high-temperature exhaust gas flows independently in its respective flow channels and avoiding the phenomenon of exhaust gas mixing. This is crucial for the efficient operation of the dual-flow exhaust system, especially the turbocharger.

[0118] The width W1 of the dividing slot 20 not only optimizes thermal stress management but also improves accuracy and reliability during assembly. This design ensures proper positioning of the baffle 30 within the dividing slot, reducing performance degradation and failure risks caused by improper assembly.

[0119] The optimized design of the dividing groove 20 helps reduce maintenance needs in the flange area, minimizes structural damage caused by thermal stress, and lowers maintenance costs. Simultaneously, it enhances the safety of the exhaust system, preventing exhaust gas leakage and engine performance degradation caused by flange cracks, thus ensuring user safety and long-term stable engine operation.

[0120] The proportional relationship between W1 and L ensures that this technical solution has good adaptability and versatility for flange openings of different sizes and flow channel arrangements. This design can be widely applied to various dual-flow exhaust systems, improving the practical value and application scope of the technical solution.

[0121] Furthermore, flange 50 is installed at the outlet end of the air outlet pipe 102;

[0122] The straight length of the unloading trough 60 along the arrangement direction of the first and second flow channels is W2;

[0123] The width of the flange opening of flange 50 along the arrangement direction of the first and second flow channels is L;

[0124] Where W2 = 0.2L.

[0125] The setting of W2 to 0.2L allows the unloading groove 60 to form in a specific area of ​​the flange opening, which can effectively absorb and disperse the thermal stress caused by the high-temperature exhaust gas. This precise dimensional control ensures that thermal stress is not excessively concentrated in the critical parts of the flange 50, thereby reducing the possibility of crack formation and propagation and improving the thermal stability of the flange 50.

[0126] The length W2 of the unloading groove 60 accounts for 20% of the flange opening width L. This design achieves optimized control of deformation caused by temperature changes while maintaining the structural strength of the flange 50. The presence of the unloading groove 60 provides the flange 50 with additional deformation space, avoiding structural damage caused by thermal expansion, while maintaining sufficient rigidity to support components such as the turbocharger.

[0127] The specific length design of the unloading groove 60 simplifies the assembly process and ensures precise alignment and a secure connection between the flange 50 and the intensifier. Furthermore, the optimized length of the unloading groove 60 facilitates the evaluation of the flange opening during maintenance or inspection, reducing maintenance difficulty and costs.

[0128] By precisely dimensionalizing the unloading groove 60 on the flange opening, the thermal management performance of the entire exhaust pipe system is improved. The unloading groove 60 guides the rational distribution of thermal stress, reduces the impact of thermal shock on the flange opening, and extends the service life of the exhaust pipe.

[0129] The optimized design of the unloading groove 60 improves the safety of the entire exhaust pipe system, avoiding potential failure risks caused by improper thermal stress management in the flange area. This design is crucial for ensuring safe engine operation and preventing deformation or damage caused by thermal fatigue.

[0130] The design ratio of W2=0.2L allows this technical solution to adapt to flange openings and flow channel arrangements of different sizes, enhancing the adaptability and versatility of the technical solution and enabling the optimization of thermal stress management to be consistently applied to various dual-flow exhaust systems.

[0131] Furthermore, flange 50 is provided at the outlet end of the gas outlet pipe 102, and the plane on the side of flange 50 away from the outlet end of the gas outlet pipe 102 is the third plane.

[0132] A fixing groove 40 is provided inside the dividing groove 20;

[0133] The distance between the bottom of the fixed groove 40 and the third plane along the extension direction of the air outlet pipe 102 is H1;

[0134] The length of the unloading groove 60 along the extension of the outlet pipe 102 between the third plane and the second unloading edge 602 is H2.

[0135] Where 0.1H1≤H2≤0.2H1.

[0136] The setting of H2 between 1 and 0.2 times H1 ensures coordination between the length of the unloading groove 60 and the depth of the fixing groove 40. This design allows for more precise management of thermal stress. The length H2 of the unloading groove 60 is sufficient to cover the depth H1 of the fixing groove 40, but not so long as to affect the overall structure of the flange 50. This effectively disperses the thermal stress caused by the high-temperature exhaust gas, avoids thermal stress concentration in the area of ​​the fixing groove 40, and reduces the risk of crack formation.

[0137] The dimensional relationship between the unloading groove 60 and the fixing groove 40 optimizes the structural stability of the flange 50 while maintaining sufficient strength. H2 is less than or equal to 0.2H1, ensuring that the presence of the unloading groove 60 does not excessively weaken the supporting capacity of the flange 50, thus finding a good balance between structural stability and thermal stress relief.

[0138] The dimensional relationship between the unloading groove 60 and the fixing groove 40 helps improve the accuracy and reliability of the assembly process. Precise control of H2 ensures proper positioning of the baffle within the fixing groove 40, while the design of the unloading groove 60 allows for deformation during thermal expansion, reducing performance degradation and failure risks caused by improper assembly or thermal deformation.

[0139] By optimizing the dimensional relationship between the unloading groove 60 and the fixing groove 40, the maintenance requirements of the flange 50 area are reduced, and structural damage caused by thermal stress is decreased. At the same time, the safety of the exhaust pipe system is enhanced, preventing flange 50 cracks and exhaust leaks caused by thermal fatigue, thus ensuring the long-term stable operation of the engine and the safety of the user.

[0140] The specific proportional relationship between the length H2 of the unloading groove 60 and the depth H1 of the fixing groove 40 improves the thermal management performance of the entire exhaust pipe system. This design makes the thermal stress distribution on the flange 50 more uniform, reduces the impact of thermal shock on the flange 50 structure, and extends the service life of the exhaust pipe.

[0141] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0142] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0143] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms 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, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0144] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0145] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0146] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An exhaust pipe structure, the exhaust pipe structure comprising an exhaust manifold (10), the exhaust manifold (10) having an intake pipe (101) and an exhaust pipe (102) communicating with each other, characterized in that, The exhaust pipe structure also includes: A baffle structure is provided inside the air outlet pipe (102) to divide the air outlet pipe into a relatively independent first flow channel and a second flow channel; A dividing groove (20) is at least partially disposed on the partition structure and located at the opening of the air outlet pipe (102); The dividing groove (20) includes a first part and a second part connected in sequence. Along the extension direction of the air outlet pipe (102), the width of the first part remains unchanged in the arrangement direction of the first flow channel and the second flow channel, while the width of the second part gradually increases in the arrangement direction of the first flow channel and the second flow channel.

2. The exhaust pipe structure according to claim 1, characterized in that, The partition structure includes an intermediate partition disposed at the opening of the air outlet pipe (102), and the dividing groove (20) is disposed at one end of the intermediate partition away from the air inlet pipe (101), and the opening of the dividing groove (20) is disposed away from the air inlet pipe (101).

3. The exhaust pipe structure according to claim 2, characterized in that, The partition structure also includes: A baffle (30) is provided on the dividing groove (20) to divide the outlet of the air pipe (102) into a first outlet and a second outlet. The first outlet is connected to the first flow channel, and the second outlet is connected to the second flow channel.

4. The exhaust pipe structure according to claim 3, characterized in that, A fixing groove (40) is provided on the bottom of the dividing groove (20) so as to fix the baffle (30) at the opening of the air outlet pipe (102) through the fixing groove (40) so as to divide the opening of the air outlet pipe (102) into the first opening and the second opening.

5. The exhaust pipe structure according to claim 4, characterized in that, The fixing groove (40) is an arc-shaped groove, and the opening of the fixing groove (40) is set away from the dividing groove (20). The baffle (30) is an arc-shaped plate, and the baffle (30) is clearance-fitted with the fixing groove (40) to fix the baffle (30) through the fixing groove (40).

6. The exhaust pipe structure according to claim 1, characterized in that, The exhaust pipe structure also includes: A flange (50) is provided at the outlet end of the gas outlet pipe (102); At least one unloading groove (60), at least a portion of said unloading groove (60) is disposed on the side of said flange (50) away from said vent pipe (102), said unloading groove (60) being located above said dividing groove (20).

7. The exhaust pipe structure according to claim 6, characterized in that, At least one of the unloading grooves (60) is an arc-shaped groove, and the opening of at least one of the unloading grooves (60) is disposed away from the flange (50); The unloading groove (60) is connected to the dividing groove (20). The intersection of the unloading groove (60) and the dividing groove (20) forms a first unloading edge (601), and the intersection of the unloading groove (60) and the flange (50) forms a second unloading edge (602). The plane on which the first unloading edge (601) is located on the dividing groove (20) is a first plane, and the plane on which the second unloading edge (602) is located on the flange (50) is a second plane. The first plane and the second plane intersect.

8. The exhaust pipe structure according to claim 7, characterized in that, The first unloading edge (601) is an arc edge, and its opening is disposed away from the air outlet pipe (102); and / or, The second unloading edge (602) is an arc edge, and its opening is set towards the air outlet pipe (102).

9. The exhaust pipe structure according to claim 4, characterized in that, The exhaust pipe structure also includes a flange (50), which is disposed at the outlet end of the exhaust pipe (102); The length of the flange (50) along the arrangement direction of the first flow channel and the second flow channel is W, the fixing groove (40) is a semi-circular groove, and the radius of the fixing groove (40) is R; Where R = W / 2.

10. The exhaust pipe structure according to claim 4, characterized in that, Also includes: A flange (50) is provided at the outlet end of the gas outlet pipe (102), and the plane of the flange (50) on the side away from the outlet end of the gas outlet pipe (102) is a third plane. Along the extension direction of the air outlet pipe, the distance between the bottom of the fixed groove (40) and the third plane is H1; Wherein, 1.05R≤H1≤1.30R.

11. The exhaust pipe structure according to claim 1, characterized in that, Also includes: A flange (50) is provided at the outlet end of the gas outlet pipe (102); The width of the first portion of the dividing groove (20) along the arrangement direction of the first flow channel and the second flow channel is W1; The width of the flange opening of the flange (50) along the arrangement direction of the first flow channel and the second flow channel is L; Among them, 0.8L≤W1≤0.9L.

12. The exhaust pipe structure according to claim 6, characterized in that, Also includes: A flange (50) is provided at the outlet end of the gas outlet pipe (102); The straight length of the unloading groove (60) along the arrangement direction of the first flow channel and the second flow channel is W2; The width of the flange opening of the flange (50) along the arrangement direction of the first flow channel and the second flow channel is L; Where W2 = 0.2L.

13. The exhaust pipe structure according to claim 7, characterized in that, Also includes: Flange (50), the flange (50) is disposed at the outlet end of the gas outlet pipe (102), and the plane of the flange (50) on the side away from the outlet end of the gas outlet pipe (102) is a third plane; A fixing groove (40) is provided inside the dividing groove (20); The distance between the bottom of the fixed groove (40) and the third plane along the extension direction of the air outlet pipe (102) is H1; The length of the unloading groove (60) along the extension of the air outlet pipe (102) from the third plane and the second unloading edge (602) is H2; Where 0.1H1≤H2≤0.2H1.

Images