Complex thin-wall heat-resistant sports car exhaust manifold stainless steel precision casting
By using high chromium, high nickel stainless steel materials and high-temperature casting molds to manufacture complex thin-walled exhaust manifolds, combined with the design of rubber pads and heat sinks, the problems of traditional exhaust manifolds being easily oxidized, corroded and deformed in high-temperature environments are solved, and a more efficient and stable exhaust system is achieved.
Patent Information
- Application Number
- CN202422334403.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-24
- Publication Date
- 2025-06-10
- Estimated Expiration
- 2034-09-24
AI Technical Summary
Traditional exhaust manifold materials (such as cast iron or ordinary steel) are prone to oxidation, corrosion and deformation in high temperature environments, resulting in insufficient overall life and reliability of the exhaust system, especially in thermal cycles and extreme operating conditions of high-performance sports cars.
Complex thin-walled heat-resistant sports car exhaust manifolds are made of high-chromium and high-nickel stainless steel materials. The stainless steel material is cast through high-temperature casting molds. Combined with the design of rubber pads and heat sinks, the heat resistance and sealing of the material are improved.
It reduces exhaust resistance, improves exhaust uniformity and stability, extends the service life of the exhaust system, and maintains the stability and oxidation resistance of the structure under high temperature conditions.
Smart Images
Figure CN222962949U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a stainless steel precision casting, in particular to a stainless steel precision casting of a complex thin-wall heat-resistant sports car exhaust manifold, belonging to the technical field of engine exhaust manifolds. Background Art
[0002] The exhaust system of a high-performance sports car is an important part of the engine. It not only affects the power output of the engine, but also directly affects the emission performance and fuel economy. The automotive exhaust manifold is an important part of the engine exhaust system. Its main function is to collect the exhaust gases discharged from each cylinder of the engine and guide these exhaust gases to the next part of the exhaust system.
[0003] However, traditional exhaust manifolds are usually made of cast iron or ordinary steel. Although ordinary steel is lighter than cast iron, its high-temperature resistance and oxidation resistance are poor. It is easy to oxidize, corrode and deform in a high-temperature environment, affecting the overall life and reliability of the exhaust system. Especially in the frequent thermal cycles and extreme working conditions of high-performance sports cars, the stability of this material is insufficient, which easily leads to early failure of the exhaust manifold. Summary of the Utility Model
[0004] The purpose of the utility model is to provide a stainless steel precision casting of a complex thin-wall heat-resistant sports car exhaust manifold to solve the above problems. By using high-chromium and high-nickel stainless steel materials, it can reduce the exhaust resistance, improve the exhaust uniformity of each pipeline, enhance the exhaust stability, improve the exhaust efficiency of the vehicle, and thus extend the service life.
[0005] The utility model realizes the above purpose through the following technical solutions. A stainless steel precision casting of a complex thin-wall heat-resistant sports car exhaust manifold includes an exhaust main pipe. The side wall of the exhaust main pipe is fixedly connected with a first intake branch pipe, a second intake branch pipe, a third intake branch pipe and a fourth intake branch pipe. The ends of the first intake branch pipe, the second intake branch pipe, the third intake branch pipe and the fourth intake branch pipe are fixedly connected with the same intake flange. The intake flange is provided with a first groove at the intake ports of the four intake branch pipes, and a first rubber pad is clamped in the first groove. A mixing port is fixedly connected to the exhaust main pipe, and an outlet flange is fixedly connected to the mixing port. The exhaust main pipe, the first intake branch pipe, the second intake branch pipe, the third intake branch pipe, the fourth intake branch pipe, the intake flange, the mixing port and the outlet flange are all cast by an exhaust manifold casting mold, and the casting material is high-chromium and high-nickel stainless steel material.
[0006] Preferably, the first intake branch pipe, the second intake branch pipe, the third intake branch pipe and the fourth intake branch pipe are independent of each other from the intake end to the outlet end. The first intake branch pipe, the second intake branch pipe, the third intake branch pipe and the fourth intake branch pipe are all communicated with the exhaust main pipe, and the exhaust main pipe is communicated with the mixing port and the outlet flange.
[0007] Preferably, the cross-section of the first rubber pad is in an "I" shape structure, and the cross-section of the intake flange at the inlets of the four intake branch pipes is in a "concave" shape structure.
[0008] Preferably, a second groove is formed in the outlet flange, and a second rubber pad is engaged in the second groove.
[0009] Preferably, the second rubber pad abuts against the outlet flange, and one end of the second rubber pad engaged with the second groove is in an "L" shape structure.
[0010] Preferably, a plurality of radiating fins are installed on the exhaust manifold, and the plurality of radiating fins are distributed in a circumferential array.
[0011] Preferably, the exhaust manifold casting mold includes an upper mold and a lower mold, and the upper mold and the lower mold are detachably connected.
[0012] Preferably, the average wall thickness of the exhaust manifold, the first intake branch pipe, the second intake branch pipe, the third intake branch pipe, the fourth intake branch pipe, the intake flange, the mixing port and the outlet flange is less than 4.7 mm, and the thinnest part is 3.6 mm.
[0013] The beneficial effects of the present utility model are as follows: the side wall of the exhaust manifold is fixedly connected with the first intake branch pipe, the second intake branch pipe, the third intake branch pipe and the fourth intake branch pipe, the ends of the first intake branch pipe, the second intake branch pipe, the third intake branch pipe and the fourth intake branch pipe are fixedly connected with the same intake flange, the exhaust manifold is fixedly connected with a mixing port, the mixing port is fixedly connected with an outlet flange, the exhaust manifold, the first intake branch pipe, the second intake branch pipe, the third intake branch pipe, the fourth intake branch pipe, the intake flange, the mixing port and the outlet flange are all cast by the exhaust manifold casting mold, and the casting material is high-chromium and high-nickel stainless steel material; it can reduce the exhaust resistance, improve the exhaust uniformity of each pipeline, enhance the exhaust stability, and improve the exhaust efficiency of the vehicle. Description of the Drawings
[0014] Figure 1 is a schematic diagram of the overall structure of the present utility model;
[0015] Figure 2 is a schematic diagram of the connection structure between the exhaust manifold and the first intake branch pipe of the present utility model;
[0016] Figure 3 is Figure 2 the enlarged schematic diagram of part A shown in
[0017] Figure 4 is a schematic diagram of the connection structure between the mixing port and the outlet flange of the present utility model;
[0018] Figure 5 is Figure 4 a schematic enlarged view of part B shown in the figure;
[0019] Figure 6 is a schematic structural view of an exhaust manifold casting mold.
[0020] In the figure: 1, exhaust manifold; 2, first intake branch pipe; 3, second intake branch pipe; 4, third intake branch pipe; 5, fourth intake branch pipe; 6, intake flange; 7, first rubber pad; 8, first groove; 9, exhaust manifold casting mold; 901, upper mold; 902, lower mold; 10, outlet flange; 11, second groove; 12, second rubber pad; 13, heat sink; 14, mixing port. Specific embodiments
[0021] The technical solution of the present utility model will be further described below in conjunction with the accompanying drawings and through specific embodiments. Among them, the accompanying drawings are only for illustrative purposes, showing only schematic diagrams, not physical diagrams, and should not be construed as a limitation of this patent; in order to better illustrate the embodiments of the present utility model, some components in the accompanying drawings will be omitted, enlarged or reduced, and do not represent the dimensions of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the accompanying drawings may be omitted.
[0022] Please refer to Figures 1-6 as shown in the figure, a complex thin-walled heat-resistant sports car exhaust manifold stainless steel precision casting, including an exhaust manifold 1, the side wall of the exhaust manifold 1 is fixedly connected with a first intake branch pipe 2, a second intake branch pipe 3, a third intake branch pipe 4 and a fourth intake branch pipe 5, the ends of the first intake branch pipe 2, the second intake branch pipe 3, the third intake branch pipe 4 and the fourth intake branch pipe 5 are fixedly connected with the same intake flange 6, the intake flange 6 is provided with a first groove 8 at the intake ports of the four intake branch pipes, a first rubber pad 7 is clamped in the first groove 8, a mixing port 14 is fixedly connected to the exhaust manifold 1, an outlet flange 10 is fixedly connected to the mixing port 14, the exhaust manifold 1, the first intake branch pipe 2, the second intake branch pipe 3, the third intake branch pipe 4, the fourth intake branch pipe 5, the intake flange 6, the mixing port 14 and the outlet flange 10 are all cast by an exhaust manifold casting mold 9, and the casting material is a high-chromium and high-nickel stainless steel material.
[0023] As a technical optimization solution of the utility model, each pipeline of the first intake manifold 2, the second intake manifold 3, the third intake manifold 4 and the fourth intake manifold 5 is independent from the intake end to the outlet end. The first intake manifold 2, the second intake manifold 3, the third intake manifold 4 and the fourth intake manifold 5 are all communicated with the exhaust main pipe 1, and the exhaust main pipe 1 is communicated with the mixing port 14 and the outlet flange 10. Each pipeline of the four intake manifolds is independent from the intake end to the outlet end and is fixedly connected to the exhaust main pipe 1, which can reduce the exhaust resistance, improve the exhaust uniformity of each pipeline, and enhance the exhaust stability.
[0024] As a technical optimization solution of the utility model, the cross-section of the first rubber pad 7 is in an "I" shape structure. The cross-section of the intake flange 6 at the inlets of the four intake manifolds is in a "concave" shape structure. A second groove 11 is formed on the outlet flange 10, and a second rubber pad 12 is engaged in the second groove 11. The second rubber pad 12 abuts against the outlet flange 10, and one end of the second rubber pad 12 engaged with the second groove 11 is in an "L" shape structure, which makes the installation of the first rubber pad 7 and the second rubber pad 12 more firm and stable, thereby making the sealing effect of the connection between the exhaust manifold and the external connection better.
[0025] As a technical optimization solution of the utility model, a plurality of heat dissipation fins 13 are installed on the exhaust main pipe 1, and the plurality of heat dissipation fins 13 are distributed in a circumferential array. The installation of the heat dissipation fins 13 on the exhaust main pipe 1 makes the heat dissipation performance of the exhaust main pipe 1 better, effectively alleviating the problems of deformation, fatigue and material weight of the exhaust manifold caused by high temperature and mechanical stress.
[0026] As a technical optimization solution of the utility model, the exhaust manifold casting mold 9 includes an upper mold 901 and a lower mold 902, and the upper mold 901 and the lower mold 902 are detachably connected. By casting the whole exhaust manifold with the exhaust manifold casting mold 9, the upper mold 901 and the lower mold 902 are detachably spliced, making the casting work more convenient and flexible.
[0027] As a technical optimization solution of the utility model, the average wall thickness of the exhaust main pipe 1, the first intake manifold 2, the second intake manifold 3, the third intake manifold 4, the fourth intake manifold 5, the intake flange 6, the mixing port 14 and the outlet flange 10 is less than 4.7 mm, and the thinnest part is 3.6 mm. A high-temperature resistant and antioxidant coating treatment is applied to the casting surface. The average wall thickness of the exhaust manifold is less than 4.7 mm, and the thinnest part is 3.6 mm to achieve the lightweight of the structure while maintaining high strength and stiffness. A high-temperature resistant and antioxidant coating treatment is applied to the casting surface to further improve the antioxidant performance and thermal fatigue life of the casting under high-temperature conditions.
[0028] When the utility model is in use, firstly, the integral exhaust manifold is cast through the exhaust manifold casting mold 9. The upper mold 901 and the lower mold 902 are detachably spliced, making the casting work more convenient and flexible. When the exhaust manifold is in use, the four first rubber pads 7 are sequentially snapped into the corresponding first grooves 8 on the intake flange 6, then the second rubber pad 12 is snapped into the second groove 11, and then the intake flange 6 is connected to the engine system, so that the intake ports of the four intake branch pipes are respectively connected and conducted with the corresponding engine cylinders. During the installation process, the first rubber pad 7 abuts against the connection part of the cylinder, so that the sealing performance of this connection part is better, and the exhaust gas discharged from the cylinder can enter the intake branch pipe more smoothly. The pipelines of the four intake branch pipes are independent of each other from the intake end to the outlet end, and are all fixedly connected to the exhaust main pipe 1, which can reduce the exhaust resistance, improve the exhaust uniformity of each pipeline, and enhance the exhaust stability. The outlet flange 10 is connected to the catalytic converter intake pipe, and at the same time, the second rubber pad 12 abuts against the connection part of the catalytic converter intake pipe, making the sealing performance of the connection part between the outlet flange 10 and the catalytic converter intake pipe better and enhancing the exhaust stability. The exhaust main pipe 1 is provided with heat dissipation fins 13, making the heat dissipation performance of the exhaust main pipe 1 better, effectively alleviating the problems of deformation, fatigue and material weight of the exhaust manifold caused by high temperature and mechanical stress. The high-chromium and high-nickel stainless steel material is used, which has excellent heat resistance, corrosion resistance and oxidation resistance, and can maintain stable structural performance under high temperature conditions. The average wall thickness of the exhaust manifold is less than 4.7 mm, and the thinnest part is 3.6 mm to achieve the light weight of the structure while maintaining high strength and stiffness. The surface of the casting is subjected to a high-temperature oxidation-resistant coating treatment to further improve the oxidation resistance and thermal fatigue life of the casting under high temperature conditions.
[0029] The above is only the preferred specific embodiment of the utility model, but the protection scope of the utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the utility model, according to the technical solution of the utility model and its inventive concept, makes equivalent substitutions or changes, and should be covered within the protection scope of the utility model.
[0030] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, the element defined by the statement "including a..." does not exclude the existence of other identical elements in the process, method, article or device including the said element.
Claims
1. A complex thin-walled heat-resistant sports car exhaust manifold stainless steel precision casting, comprising an exhaust manifold (1), characterized in that: The side wall of the exhaust manifold (1) is fixedly connected with a first intake branch pipe (2), a second intake branch pipe (3), a third intake branch pipe (4) and a fourth intake branch pipe (5); the ends of the first intake branch pipe (2), the second intake branch pipe (3), the third intake branch pipe (4) and the fourth intake branch pipe (5) are fixedly connected with a same intake flange (6); the intake flange (6) is provided with a first groove (8) at the air inlet of each of the four intake branch pipes; a A first rubber pad (7), a mixing port (14) is fixedly connected to the exhaust manifold (1), an outlet flange (10) is fixedly connected to the mixing port (14), the exhaust manifold (1), the first intake branch pipe (2), the second intake branch pipe (3), the third intake branch pipe (4), the fourth intake branch pipe (5), the intake flange (6), the mixing port (14) and the outlet flange (10) are all cast from an exhaust manifold casting mold (9), and the casting material is a high-chromium and high-nickel stainless steel material.
2. The complex thin-walled heat-resistant sports car exhaust manifold stainless steel precision casting according to claim 1, characterized in that: The first air intake branch pipe (2), the second air intake branch pipe (3), the third air intake branch pipe (4) and the fourth air intake branch pipe (5) are independent of each other from the air intake end to the air outlet end; the first air intake branch pipe (2), the second air intake branch pipe (3), the third air intake branch pipe (4) and the fourth air intake branch pipe (5) are all connected to the exhaust main pipe (1); and the exhaust main pipe (1) is connected to the mixer port (14) and the air outlet flange (10).
3. The complex thin-walled heat-resistant sports car exhaust manifold stainless steel precision casting according to claim 1, characterized in that: The cross section of the first rubber pad (7) is in the shape of an I-shaped structure, and the cross section of the air intake flange (6) located at the inlet of the four air intake branch pipes is in the shape of a concave-shaped structure.
4. The complex thin-walled heat-resistant sports car exhaust manifold stainless steel precision casting according to claim 1, characterized in that: The air outlet flange (10) is provided with a second groove (11), and a second rubber pad (12) is clamped in the second groove (11).
5. The complex thin-walled heat-resistant sports car exhaust manifold stainless steel precision casting according to claim 4, characterized in that: The second rubber pad (12) and the air outlet flange (10) are in contact with each other, and one end of the second rubber pad (12) that is engaged with the second groove (11) is in an "L"-shaped structure.
6. The complex thin-walled heat-resistant sports car exhaust manifold stainless steel precision casting according to claim 1, characterized in that: A plurality of cooling fins (13) are installed on the exhaust manifold (1), and the plurality of cooling fins (13) are distributed in a circular array.
7. The complex thin-walled heat-resistant sports car exhaust manifold stainless steel precision casting according to claim 1, characterized in that: The exhaust manifold casting mold (9) comprises an upper mold (901) and a lower mold (902), and the upper mold (901) and the lower mold (902) are detachably connected.