Exhaust supercharging system and engine
By embedding the middle partition plate of the exhaust pipe inside the turbocharger flange and installing an outer partition plate of the turbocharger, the problem of low-cycle fatigue cracks caused by asynchronous thermal deformation of the exhaust pipe is solved, thereby improving the reliability of the exhaust pipe and the performance of the engine.
Patent Information
- Application Number
- CN202520111660.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-17
- Publication Date
- 2025-11-18
- Estimated Expiration
- 2035-01-17
AI Technical Summary
The exhaust pipe is prone to low-cycle fatigue cracks due to asynchronous thermal deformation between the intermediate partition and the turbocharger flange, which in turn leads to exhaust pipe leakage and a decrease in engine performance.
The middle partition of the exhaust pipe is recessed into the flange of the turbocharger, and an outer partition of the turbocharger is installed on the turbocharger to connect with the middle partition to form a partition assembly, which separates the exhaust gas flow path and eliminates thermal stress.
It reduces the probability of low-cycle fatigue cracks in the exhaust pipe, prevents air leakage, and improves the reliability of the exhaust pipe and engine performance.
Smart Images
Figure CN223562906U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of engine structure, more particularly, to an exhaust supercharging system and an engine. BACKGROUND
[0002] In order to ensure more sufficient fuel combustion and increase the output power of the engine, a supercharger is generally configured for the engine at present, the supercharger generally includes a turbine and a compressor, the exhaust gas discharged by the engine is introduced into the supercharger, and the energy of the exhaust gas is used to drive the turbine to rotate, so that the compressor coaxial with the turbine is driven to realize supercharging.
[0003] At present, the exhaust pipe connected with the supercharger is a double-flow exhaust pipe, which is divided into two exhaust gas flow channels by an intermediate partition plate. The exhaust pipe supercharger flange opening is connected with the supercharger, so that the exhaust gas of the exhaust pipe can enter the supercharger through the exhaust gas flow channels.
[0004] With the increasing demand for performance improvement of engine products, the thermal load of the exhaust system continues to increase, and the exhaust gas temperature is getting higher and higher. The high-temperature exhaust gas generated by the engine flows out through the two exhaust gas flow channels of the exhaust pipe. The temperature change speed of the intermediate partition plate is significantly higher than that of the rest of the supercharger flange opening due to the heating action of the two high-temperature exhaust gases at the same time. The thermal deformation between the intermediate partition plate and the supercharger flange opening is out of sync, causing a large thermal stress in the transition area of the intermediate partition plate and the supercharger flange opening, which is prone to low-cycle fatigue cracks, causing exhaust pipe leakage and engine performance degradation and other problems.
[0005] Therefore, how to reduce the probability of low-cycle fatigue cracks in the exhaust pipe and prevent exhaust pipe leakage and engine performance degradation and other problems is a problem to be solved by those skilled in the art. CONTENT OF THE UTILITY MODEL
[0006] Therefore, the purpose of the present application is to provide an exhaust supercharging system to reduce the probability of low-cycle fatigue cracks in the exhaust pipe and prevent exhaust pipe leakage and engine performance degradation and other problems.
[0007] Another purpose of the present application is to provide an engine with the above-mentioned exhaust supercharging system.
[0008] To achieve the above-mentioned purpose, the present application provides the following technical solutions:
[0009] The first aspect of the present application provides an exhaust supercharging system, comprising an exhaust pipe and a supercharger;
[0010] The exhaust pipe is divided into a plurality of exhaust gas flow channels by an intermediate partition plate, and the exhaust pipe has a supercharger flange opening, and the intermediate partition plate is recessed in the end face of the supercharger flange opening;
[0011] The supercharger has a flange opening on the exhaust side in communication with the supercharger flange opening, and the supercharger outer partition plate is arranged to extend into the supercharger flange opening to abut the intermediate partition plate.
[0012] In a possible implementation, one side of the intermediate partition plate facing the supercharger flange opening is formed with a recessed groove, and the supercharger outer partition plate is embedded in the recessed groove to block the recessed groove.
[0013] In a possible implementation, one side surface of the recessed groove facing the supercharger flange opening is a concave arc surface, and one side surface of the supercharger outer partition plate facing the recessed groove is a convex arc surface matched with the concave arc surface.
[0014] In a possible implementation, the radius of the concave arc surface is R, and the radius of the convex arc surface is R0, and R>R0.
[0015] In a possible implementation, the difference between the radius R of the concave arc surface and the radius R0 of the convex arc surface is 0.1mm-0.2mm.
[0016] In a possible implementation, one side surface of the recessed groove facing the supercharger flange opening is a first abutting surface, and one side surface of the supercharger outer partition plate facing the recessed groove is a second abutting surface abutting with the first abutting surface.
[0017] The first abutting surface and the second abutting surface each include a plurality of surface portions connected in sequence.
[0018] In a possible implementation, the surface portions in the first abutting surface and the second abutting surface include at least arc surface portions; or the surface portions in the first abutting surface and the second abutting surface include at least plane portions.
[0019] In a possible implementation, the supercharger outer partition plate is arranged on a flange end surface of the exhaust side flange opening and is integrally cast with the flange of the exhaust side flange opening.
[0020] In a possible implementation, the exhaust pipe and the supercharger are connected by fasteners; and / or,
[0021] A sealing gasket is arranged between the supercharger flange opening and the exhaust side flange opening.
[0022] The exhaust gas supercharging system provided in the application removes part of the intermediate partition plate based on the original exhaust pipe, so that the intermediate partition plate is recessed into the end face of the supercharger flange opening. In order to realize the separation of the exhaust gas flow channel, the supercharger outer partition plate is arranged on the supercharger. After the exhaust pipe is connected with the supercharger, the supercharger outer partition plate is inserted into the supercharger flange opening and is in butt joint with the intermediate partition plate, so as to compensate for the missing part of the intermediate partition plate, so that each exhaust gas flow channel of the exhaust pipe can be separated by the partition plate assembly composed of the intermediate partition plate and the supercharger outer partition plate.
[0023] In the application, part of the intermediate partition plate close to the supercharger flange opening is removed, so that the rapid temperature change of the intermediate partition plate no longer affects the flange of the supercharger flange opening, the thermal stress generated due to the out-of-sync deformation between the two is eliminated, the probability of low cycle fatigue cracks of the exhaust pipe is reduced, and the problems such as exhaust pipe leakage and engine performance decline are prevented. The supercharger outer partition plate integrated on the supercharger can cooperate with the remaining part of the intermediate partition plate to ensure the separation of the exhaust gas flow channel, and the reliability of the exhaust pipe is improved.
[0024] The second aspect of the application provides an engine comprising the exhaust gas supercharging system according to any one of the above.
[0025] The engine provided in the application has the above-mentioned exhaust gas supercharging system, and therefore has all the technical effects of the exhaust gas supercharging system, which will not be described herein again. BRIEF DESCRIPTION OF DRAWINGS
[0026] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the drawings needed in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can also be obtained by those skilled in the art without creative labor.
[0027] Figure 1 It is a structural schematic diagram of a traditional exhaust pipe;
[0028] Figure 2 It is an exhaust gas flow diagram of a traditional exhaust pipe;
[0029] Figure 3 It is a partial sectional view of the exhaust gas supercharging system disclosed in the embodiment of the application;
[0030] Figure 4 It is a structural schematic diagram of the exhaust pipe disclosed in the embodiment of the application;
[0031] Figure 5 It is a partial sectional view of the exhaust pipe disclosed in the embodiment of the application;
[0032] Figure 6This is a schematic diagram of the turbocharger disclosed in the embodiments of this application.
[0033] The meanings of the various reference numerals in the figure are as follows:
[0034] 100 - Exhaust pipe;
[0035] 111 - First pair of interfaces; 112 - First exhaust gas interface; 113 - First flow channel;
[0036] 121 - Second pair of interfaces; 122 - Second exhaust gas interface; 123 - Second flow channel;
[0037] 131-Intensifier flange; 132-Intermediate partition plate; 133-Inner groove;
[0038] 200 - Turbocharger; 201 - Exhaust gas side flange; 202 - Turbocharger outer diaphragm;
[0039] 300 - Sealing gasket;
[0040] 400 - Fasteners. Detailed Implementation
[0041] The core of this application is to provide an exhaust supercharging system to reduce the probability of low-cycle fatigue cracks in the exhaust pipe and prevent problems such as exhaust pipe leakage and engine performance degradation.
[0042] Another core aspect of this application is to provide an engine having the aforementioned exhaust supercharging system.
[0043] Hereinafter, embodiments will be described with reference to the accompanying drawings. Furthermore, the embodiments shown below do not limit the scope of the application as described in the claims. Additionally, the complete composition represented in the embodiments below is not limited to what is necessary as the solution to the application described in the claims. It should be noted that, for ease of description, only the parts relevant to the application are shown in the drawings. Unless otherwise specified, the embodiments and features described in this application can be combined with each other.
[0044] Taking a six-cylinder engine as an example, its exhaust manifold generally consists of three sections. For ease of understanding, these three exhaust sections are defined according to their positions as the left exhaust pipe (not shown in the diagram), the middle exhaust pipe (…), and the… Figure 1 The exhaust pipe shown is the middle exhaust pipe) and the right exhaust pipe (not shown in the figure).
[0045] like Figure 1 and Figure 2As shown, the middle partition plate 132 of the middle exhaust pipe (hereinafter referred to as the exhaust pipe) divides the exhaust pipe into two flow channels (a first flow channel 113 and a second flow channel 123). The exhaust pipe generally comprises a first pair of interfaces 111 and a second pair of interfaces 121, the first pair of interfaces 111 being in communication with the first flow channel 113, and the second pair of interfaces 121 being in communication with the second flow channel 123, and the first pair of interfaces 111 and the second pair of interfaces 121 are respectively used to communicate with the left exhaust pipe and the right exhaust pipe.
[0046] The exhaust pipe is also provided with two exhaust interfaces (a first exhaust interface 112 and a second exhaust interface 122), and the first exhaust interface 112 and the second exhaust interface 122 are respectively used to communicate with the exhaust manifold of the engine cylinder. The left exhaust pipe and the right exhaust pipe are also provided with exhaust interfaces in communication with the corresponding exhaust manifold.
[0047] The exhaust pipe is also provided with a supercharger flange 131 for communicating with the supercharger, so that the exhaust gas in the exhaust pipe can enter the supercharger through the supercharger flange 131 to achieve the effect of supercharging. The middle partition plate 132 extends to the end face of the supercharger flange 131. Since the middle partition plate 132 simultaneously bears the heating action of the two high-temperature exhaust gases, the temperature change speed of the middle partition plate 132 is significantly higher than that of the remaining area of the supercharger flange 131, and the thermal deformation between the middle partition plate 132 and the supercharger flange 131 is not synchronized, causing a large thermal stress in the transition area where the middle partition plate 132 and the supercharger flange 131 are connected, and low-cycle fatigue cracks are prone to occur.
[0048] Based on this, the exhaust supercharging system disclosed by the embodiments of the present application is used to reduce the probability of low-cycle fatigue cracks in the exhaust pipe 100 and prevent problems such as exhaust pipe 100 leakage and engine performance decline.
[0049] As shown in Figure 3 , the exhaust supercharging system disclosed by the embodiments of the present application comprises an exhaust pipe 100 and a supercharger 200. As shown in Figure 4 and Figure 5 , the exhaust pipe 100 is divided into a plurality of exhaust flow channels by a middle partition plate. It should be noted that generally there are only two exhaust flow channels, and only one middle partition plate is needed to divide the cavity inside the exhaust pipe 100 into two parts, so that exhaust gases from different sources flow through the two exhaust flow channels. If there is a need to divide the exhaust pipe 100 into more exhaust flow channels, the number of middle partition plates can be increased accordingly to increase the number of exhaust flow channels.
[0050] The exhaust pipe 100 has a supercharger flange 131, and the intermediate partition plate is recessed into the end face of the supercharger flange 131. It can be understood that the intermediate partition plate has a defective part compared with the traditional structure, so that the intermediate partition plate cannot extend to the end face of the supercharger flange 131. The size of the intermediate partition plate recessed into the end face of the supercharger flange 131 can be adjusted according to the needs of those skilled in the art.
[0051] In addition, the intermediate partition plate with a defective part can be integrally cast with other structures of the exhaust pipe 100, or a complete intermediate partition plate can be integrally cast with other structures of the exhaust pipe 100, and then the corresponding part of the intermediate partition plate is removed by machining, so that the intermediate partition plate is recessed into the end face of the supercharger flange 131. In this embodiment, the forming method of the intermediate partition plate recessed into the end face of the supercharger flange 131 is not limited.
[0052] The structure of the supercharger 200 is shown in Figure 6 The supercharger 200 has a waste gas side flange 201 connected to the supercharger flange 131, and the waste gas side flange 201 is provided with a supercharger outer partition plate 202 extending into the supercharger flange 131 to abut the intermediate partition plate. Those skilled in the art can understand that the defective part of the intermediate partition plate of the exhaust pipe 100 is arranged at the supercharger flange 131 of the supercharger 200, so that after the supercharger 200 is connected to the exhaust pipe 100, that is, after the supercharger flange 131 is connected to the waste gas side flange 201, the supercharger outer partition plate 202 will extend into the supercharger flange 131 and abut on the intermediate partition plate, thereby serving as the defective part of the intermediate partition plate, and ensuring that the waste gas flow channel is always separated without being affected by the defective intermediate partition plate.
[0053] Although the supercharger outer partition plate 202 extends into the supercharger flange 131 and is also heated by the high-temperature waste gas, the temperature change speed of the supercharger outer partition plate 202 is higher than that of the flange of the supercharger flange 131. However, the supercharger outer partition plate 202 is different from the intermediate partition plate of the exhaust pipe 100, both sides of the intermediate partition plate are connected to the inner wall of the cavity of the exhaust pipe 100, which is restricted by the inner wall of the cavity of the exhaust pipe 100 and cannot release stress by deformation, thereby causing low-cycle fatigue cracks. In order to extend into the supercharger flange 131, the supercharger outer partition plate 202 must be located outside the supercharger flange 131, that is, even if the supercharger outer partition plate 202 has thermal stress, it is not too restricted by the flange of the supercharger flange 131, and can deform itself to offset the thermal stress, thereby reducing the risk of low-cycle fatigue cracks in the connection area of the supercharger outer partition plate 202.
[0054] In summary, the exhaust supercharging system disclosed in the embodiments of the present application removes part of the intermediate partition plate based on the original exhaust pipe, so that the intermediate partition plate is recessed in the end face of the supercharger flange opening 131. In order to realize the separation of the exhaust flow channel, the supercharger outer partition plate 202 is arranged on the supercharger. After the exhaust pipe 100 is connected with the supercharger 200, the supercharger outer partition plate 202 is inserted into the supercharger flange opening 131 and is butted against the intermediate partition plate, so as to compensate for the missing part of the intermediate partition plate, and the exhaust flow channels of the exhaust pipe 100 can be separated by the partition plate assembly composed of the intermediate partition plate and the supercharger outer partition plate 202.
[0055] In the embodiments of the present application, part of the intermediate partition plate close to the supercharger flange opening 131 is removed, so that the rapid temperature change of the intermediate partition plate no longer affects the flange of the supercharger flange opening 131, the thermal stress generated by the out-of-sync deformation between the two is eliminated, the probability of low-cycle fatigue cracks of the exhaust pipe 100 is reduced, and the problems such as exhaust leakage of the exhaust pipe 100 and performance degradation of the engine are prevented. The supercharger outer partition plate 202 integrated on the supercharger 200 can cooperate with the remaining part of the intermediate partition plate to ensure the separation of the exhaust flow channel and improve the reliability of the exhaust pipe 100.
[0056] In a specific embodiment of the present application, the side of the intermediate partition plate facing the supercharger flange opening 131 is formed with a recessed groove 133, and the supercharger outer partition plate 202 is embedded in the recessed groove 133 to block the recessed groove 133. It should be noted that the external contour shape of the supercharger outer partition plate 202 should be designed according to the internal contour shape of the recessed groove 133, so that the supercharger outer partition plate 202 can block the recessed groove 133 after being inserted into the recessed groove 133.
[0057] Further, the side surface of the recessed groove 133 facing the supercharger flange opening 131 is an inner concave arc surface, and the side surface of the supercharger outer partition plate 202 facing the recessed groove 133 is an outer convex arc surface matched with the inner concave arc surface. After the supercharger 200 is connected with the exhaust pipe 100, the supercharger outer partition plate 202 will extend into the supercharger flange opening 131. Finally, the outer convex arc surface of the supercharger outer partition plate 202 is attached to the inner concave arc surface of the intermediate partition plate, so as to compensate for the missing part of the intermediate partition plate.
[0058] In the embodiments, the butt joint surface of the supercharger outer partition plate 202 and the intermediate partition plate is designed as an arc surface, which has low sensitivity to machining errors. Even if there is a slight machining error, it will not significantly affect the butt joint of the supercharger outer partition plate 202 and the intermediate partition plate.
[0059] The radius of the inner concave arc surface is R, and the radius of the outer convex arc surface is R0. In order to ensure that the outer partition plate 202 of the supercharger does not appear the phenomenon that the outer convex arc surface cannot be attached to the inner concave arc surface after extending into the flange opening 131 of the supercharger, in the embodiment, R > R0. That is, the inner concave arc surface has a relatively large radius, so that the outer partition plate 202 of the supercharger cannot be stuck by the opening side of the inward recessed groove 133, and it is ensured that the farthest end of the outer convex arc surface can be attached to the farthest end of the inner concave arc surface (the farthest end is only the most downstream in the insertion direction).
[0060] In the embodiment, the difference between the radius R of the inner concave arc surface and the radius R0 of the outer convex arc surface is 0.1 mm to 0.2 mm. That is, the radius R of the inner concave arc surface is slightly larger than the radius R0 of the outer convex arc surface, so that under the premise of ensuring that the farthest end of the outer convex arc surface can be attached to the farthest end of the inner concave arc surface, the inner concave arc surface and the outer convex arc surface are prevented from being attached not tightly and having a large gap. Since the outer convex arc surface of the outer partition plate 202 of the supercharger is located outside the flange opening 201 of the exhaust gas side, it is easier to machine. In order to ensure the accurate attachment of the inner concave arc surface and the outer convex arc surface, the outer convex arc surface of the outer partition plate 202 of the supercharger can be machined to ensure the installation precision requirement. Considering the manufacturing tolerance and the sealing of the exhaust gas flow channels on both sides, it is recommended that R0 = R - (0.1 mm to 0.2 mm).
[0061] In a specific embodiment of the present application, for the convenience of understanding, the side surface of the inward recessed groove 133 facing the supercharger flange opening 131 is defined as a first abutting surface, and the side surface of the outer partition plate 202 of the supercharger facing the inward recessed groove 133 is defined as a second abutting surface abutting with the first abutting surface. The first abutting surface can be the inner concave arc surface in the previous embodiment, and the second abutting surface can be the outer convex arc surface in the previous embodiment. That is, the first abutting surface and the second abutting surface can only include one surface, for example, can only include a cylindrical surface (such as the inner concave arc surface and the outer convex arc surface in the previous embodiment), can only include a plane, and of course can only include other curved surfaces except arc surfaces and flat surfaces.
[0062] In addition, the first abutting surface and the second abutting surface can also include multiple surface parts connected in sequence. That is, the first abutting surface and the second abutting surface include multiple surface parts, and each surface part is connected in sequence to form a structure in which the first abutting surface and the second abutting surface cooperate with each other.
[0063] Further, the surface parts in the first abutting surface and the second abutting surface at least include arc surface parts; of course, the surface parts in the first abutting surface and the second abutting surface can also at least include flat surface parts. For example, the first abutting surface can include an inner concave arc surface section and first flat surface sections located at both ends of the inner concave arc surface section, and correspondingly, the second abutting surface includes an outer convex arc surface section matched with the inner concave arc surface section and a second flat surface section attached to the first flat surface section.
[0064] It should be noted that the first abutting surface and the second abutting surface can also only include multiple arc segments with different radii. For example, a middle arc segment located in the middle and side arc segments located on both sides of the middle arc segment. In order to facilitate installation, the diameter of the middle arc segment can be designed to be smaller than the diameter of the side arc segment. The transition between the middle arc segment and the side arc segment can be smoothly transitioned through a transition arc.
[0065] The first abutting surface and the second abutting surface can also only include multiple plane segments with different angles. For example, a middle plane segment located in the middle and side plane segments located on both sides of the middle plane segment. In order to facilitate installation, the two side plane segments can be extended outward from both sides of the middle plane segment, so that the side plane segments form an obtuse angle with the middle plane segment, ensuring that the inner recess 133 forms a larger opening to facilitate the insertion of the outer partition plate 202 of the supercharger. The transition between the middle plane segment and the side plane segment can be smoothly transitioned through a transition arc.
[0066] The specific form of the first abutting surface and the second abutting surface of the present embodiment is not limited, and can include a plane segment, or only an arc segment, or both a plane segment and an arc segment, or multiple plane segments or multiple arc segments, as long as it can form the concave-convex cooperation between the outer partition plate 202 of the supercharger and the inner recess 133.
[0067] In a specific embodiment of the present application, the outer partition plate 202 of the supercharger is arranged on the flange end surface of the exhaust flange opening 201, and is integrally cast with the flange of the exhaust flange opening 201. If the supercharger 200 is a double-flow supercharger, the supercharger has a supercharger inner partition plate in the volute, which divides the volute into two flow channels. The outer partition plate 202 of the supercharger can be connected with the supercharger inner partition plate, and the two exhaust flow channels in the exhaust pipe 100 are in one-to-one correspondence with the two exhaust flow channels of the supercharger 200.
[0068] The exhaust pipe 100 and the supercharger 200 are connected by fasteners 400. The flange of the exhaust flange opening 201 is provided with first fastener holes, and the flange of the supercharger flange opening 131 is provided with second fastener holes. After the exhaust flange opening 201 and the supercharger flange opening 131 are abutted, each first fastener hole is in one-to-one correspondence with each second fastener hole, and then fastened by the fastener 400.
[0069] Figure 6 In the scheme shown, the flange of the exhaust flange opening 201 is provided with one first fastener hole at each of the four corners, a total of four first fastener holes. The four first fastener holes form a rectangle, and the outer partition plate 202 of the supercharger is arranged in the middle of the flange in the length direction. The four first fastener holes are arranged symmetrically on both sides of the outer partition plate 202 of the supercharger.
[0070] It should be understood by those skilled in the art that the specific number of the first fastener holes is not limited to four, and those skilled in the art can set the number of the first fastener holes and the arrangement position of the first fastener holes according to the needs.
[0071] In order to ensure the sealing performance of the abutment of the supercharger flange opening 131 and the exhaust gas side flange opening 201, and prevent exhaust gas from leaking through the abutment of the supercharger flange opening 131 and the exhaust gas side flange opening 201, in the embodiment, a sealing gasket 300 is arranged between the supercharger flange opening 131 and the exhaust gas side flange opening 201.
[0072] In order to ensure the sealing effect of the sealing gasket 300, the sealing gasket 300 needs to have a certain area, that is, the sealing gasket 300 needs to have a large width, which will inevitably cover the first fastener hole and the second fastener hole. In order to enable the fastener 400 to be fastened, a third fastener hole communicating with the first fastener hole and the second fastener hole needs to be arranged at the corresponding position of the sealing gasket 300. The fastener passes through the first fastener hole, the second fastener hole and the third fastener hole at the same time and is then fixed.
[0073] The thickness of the sealing gasket 300 can be set according to the matching relationship between the supercharger outer partition plate 202 and the recessed groove 133. When the size of the supercharger outer partition plate 202 and the recessed groove 133 causes a gap between them, a thinner sealing gasket 300 can be selected to reduce the gap. When the size of the supercharger outer partition plate 202 and the recessed groove 133 causes the abutment of them, but there is a gap between the supercharger flange opening 131 and the exhaust gas side flange opening 201 and they cannot be abutted, a thicker sealing gasket 300 can be selected to compensate for the gap between the supercharger flange opening 131 and the exhaust gas side flange opening 201.
[0074] The embodiment of the application further discloses an engine comprising the exhaust supercharging system disclosed in the above embodiment. The engine disclosed in the embodiment of the application has all the technical effects of the exhaust supercharging system, which will not be described herein again.
[0075] As shown in the present application and claims, unless the context clearly indicates otherwise, the words "one", "an", "a", and / or "the" do not mean a single number, but also include plural. Generally, the terms "comprise" and "include" only indicate the inclusion of the steps and elements explicitly identified, and these steps and elements do not constitute an exclusive list, and the method or device can also include other steps or elements. The element defined by the statement "comprises one" does not exclude the presence of another identical element in the process, method, product or device comprising the element.
[0076] In the description of the present application, the words such as setting, installing, connecting and the like should be understood in a broad sense unless otherwise explicitly defined, and the specific meanings of the above words in the present application can be reasonably determined by those skilled in the art in combination with the specific content of the technical solutions.
[0077] The various embodiments are described in the present specification in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be mutually referred to.
[0078] The principles and implementation modes of the present application are described by applying specific examples herein, and the above description of the examples is only for helping to understand the method of the present application and its core idea. It should be pointed out that, for those skilled in the art, without departing from the principles of the present application, some improvements and modifications can be made to the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.
Claims
1. An exhaust boosting system, characterized in that, Includes an exhaust pipe (100) and a turbocharger (200); The exhaust pipe (100) is divided into multiple exhaust gas channels by a middle partition, and the exhaust pipe (100) has a turbocharger flange (131), with the middle partition recessed within the end face of the turbocharger flange (131). The turbocharger (200) has an exhaust gas side flange (201) that is connected to the turbocharger flange (131). The exhaust gas side flange (201) is provided with an outer turbocharger partition (202) that extends into the turbocharger flange (131) to connect with the intermediate partition.
2. The exhaust booster system as described in claim 1, characterized in that, An indentation (133) is formed on the side of the intermediate partition facing the turbocharger flange (131), and the turbocharger outer partition (202) is embedded in the indentation (133) to seal the indentation (133).
3. The exhaust booster system as described in claim 2, characterized in that, The surface of the recessed groove (133) facing the turbocharger flange (131) is a concave arc surface, and the surface of the turbocharger outer partition plate (202) facing the recessed groove (133) is a convex arc surface that matches the concave arc surface.
4. The exhaust booster system as described in claim 3, characterized in that, If the radius of the concave arc surface is R and the radius of the convex arc surface is R0, then R > R0.
5. The exhaust booster system as described in claim 4, characterized in that, The difference between the radius R of the concave arc surface and the radius R0 of the convex arc surface is 0.1mm~0.2mm.
6. The exhaust booster system as described in claim 2, characterized in that, The surface of the recessed groove (133) facing the turbocharger flange (131) is the first mating surface, and the surface of the turbocharger outer partition plate (202) facing the recessed groove (133) is the second mating surface that abuts against the first mating surface. Both the first mating surface and the second mating surface include multiple surface segments connected in sequence.
7. The exhaust booster system as described in claim 6, characterized in that, The surface portion of the first mating surface and the second mating surface includes at least an arcuate portion; or, the surface portion of the first mating surface and the second mating surface includes at least a planar portion.
8. The exhaust booster system according to any one of claims 1-7, characterized in that, The turbocharger outer partition (202) is disposed on the flange end face of the exhaust gas side flange (201) and is integrally cast with the flange of the exhaust gas side flange (201).
9. The exhaust booster system according to any one of claims 1-7, characterized in that, The exhaust pipe (100) and the turbocharger (200) are connected by fasteners (400); and / or, A sealing gasket (300) is provided between the turbocharger flange (131) and the exhaust gas side flange (201).
10. An engine, characterized in that, Includes the exhaust booster system as described in any one of claims 1-9.