Exhaust turbofan, exhaust device, power system and vehicle

Abstract

The utility model provides an exhaust turbofan, an exhaust device, a power system and a vehicle, the exhaust turbofan is used on the exhaust device of the power system, the turbofan comprises a shell, the shell is provided with an air inlet, an air outlet and an exhaust channel communicated with the air inlet and the air outlet, and the air inlet is suitable for being communicated with an exhaust pipeline of the exhaust device; the first turbofan is rotatably arranged in the exhaust channel; the shell is further provided with an air suction port, the air suction port communicates with the exhaust channel and the external space, and the first turbofan is configured to be suitable for driving air in the external space to enter the exhaust channel through the air suction port. According to the exhaust turbofan, the first turbofan body and the air suction port are arranged, the first turbofan body rotates to drive airflow in external air to enter the exhaust channel from the air suction port, high-temperature tail gas can be cooled, and therefore the heat damage influence of the high-temperature tail gas on components can be reduced, and the service life of the components can be guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of vehicle manufacturing technology, and in particular to an exhaust turbofan, an exhaust device, a power system, and a vehicle. Background Technology

[0002] In existing exhaust turbofan designs, when high-temperature gas flows from the exhaust pipe to the exhaust turbofan, the high temperature of the gas can cause thermal damage to the exhaust pipe and the vehicle's underside structure. This can lead to damage or reduced strength of the exhaust pipe, thus affecting the service life of the components. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention provides an exhaust turbofan that can ensure the service life of components.

[0004] This application also proposes an exhaust device having the aforementioned exhaust turbofan.

[0005] This application also proposes a power system having the above-mentioned exhaust device.

[0006] This application also proposes a vehicle having the aforementioned power system.

[0007] According to a first aspect of the present invention, an exhaust turbofan is used in an exhaust device of a power system, comprising: a housing having an air inlet and an air outlet, and an exhaust passage communicating with the air inlet and the air outlet, the air inlet being adapted to communicate with an exhaust pipe of the exhaust device; a first turbofan rotatably disposed within the exhaust passage; wherein the housing further comprises an air intake, the air intake communicating with the exhaust passage and an external space, and the first turbofan being configured to drive air in the external space through the air intake into the exhaust passage.

[0008] According to the exhaust turbofan of this utility model, by setting a first turbofan and an air intake, the rotation of the first turbofan can drive the airflow in the outside air to enter the exhaust channel from the air intake, which can cool the high-temperature exhaust gas, thereby reducing the thermal damage of the high-temperature exhaust gas to the components and thus ensuring the service life of the components.

[0009] According to some embodiments of the present invention, the first turbofan is configured to rotate under the impetus of airflow entering the exhaust channel from the air inlet.

[0010] According to some embodiments of the present invention, the exhaust turbofan includes: a second turbofan disposed in the exhaust channel, the second turbofan being configured to rotate under the impingement of the airflow entering the exhaust channel through the exhaust pipe, wherein the second turbofan is connected to the first turbofan and is used to drive the first turbofan to rotate.

[0011] According to some optional embodiments of the present invention, the air inlet and the air outlet are respectively arranged on both sides of the housing in a first direction, the exhaust channel extends along the first direction, and the first turbofan and the second turbofan are arranged at intervals in the exhaust channel along the first direction.

[0012] According to some optional embodiments of the present invention, the second turbofan includes a plurality of blades, which are arranged at circumferential intervals along the exhaust channel. In the direction of airflow within the exhaust channel, the angle between the blades and the first direction is less than or equal to 15°.

[0013] According to some embodiments of the present invention, the first turbofan includes a plurality of blades, which are arranged at circumferential intervals along the exhaust channel.

[0014] According to some optional embodiments of the present invention, in the radially outward direction along the first turbofan, the width of the fan blades gradually increases in the circumferential direction of the first turbofan.

[0015] According to some optional embodiments of the present invention, the projection of the fan blade perpendicular to the first direction is formed as a triangular fan shape.

[0016] According to some embodiments of the present invention, the exhaust turbofan further includes: a rotating shaft, the rotating shaft being disposed within the exhaust channel and extending along a first direction, the first turbofan and the second turbofan being sleeved and fixed on the rotating shaft, and arranged at intervals in the first direction.

[0017] According to some optional embodiments of the present invention, the exhaust turbofan includes: a bearing, the bearing being disposed in the housing and located within the exhaust channel, and the rotating shaft being rotatably supported on the bearing.

[0018] According to some embodiments of the present invention, the housing is a cylindrical shape extending along a first direction, the air intake and the air inlet are located on the same side of the housing in the first direction and are arranged at intervals along the radial direction of the housing, and the air intake is located on the outer side of the air inlet in the radial direction of the housing.

[0019] According to some optional embodiments of the present invention, the housing includes: an air inlet pipe, the air inlet pipe passing through the air inlet, one end of the air inlet pipe extending into the exhaust channel, and the air intake port located radially outside the air inlet pipe.

[0020] According to some optional embodiments of the present invention, the first turbofan is disposed near the end of the intake pipe.

[0021] According to some embodiments of the present invention, the housing is a cylindrical shape extending along a first direction. The housing includes a first segment, a second segment, and a third segment connected sequentially along the first direction. In the direction from the first segment to the third segment, the cross-sectional area of ​​the second segment gradually decreases. The air inlet is formed on the end face of the first segment away from the second segment, and the end of the third segment away from the second segment is open to form the air outlet.

[0022] An exhaust device according to a second aspect of the present invention includes: an exhaust pipe; a muffler connected in series to the exhaust pipe; and an exhaust turbofan according to a first aspect of the present invention, wherein the exhaust turbofan is connected in series to the exhaust pipe and located downstream of the muffler, or the exhaust turbofan is connected to the outlet end of the exhaust pipe.

[0023] According to the exhaust device of this utility model, by setting the exhaust turbofan of the first aspect embodiment above, by setting the first turbofan and the intake port, the rotation of the first turbofan can drive the airflow in the outside air to enter the exhaust channel from the intake port, which can cool the high-temperature exhaust gas, thereby reducing the heat damage of the high-temperature exhaust gas to the components, and thus ensuring the service life of the components.

[0024] A power system according to a third aspect of the present invention includes: an engine; and an exhaust device according to a second aspect of the present invention, wherein the inlet end of the exhaust pipe is connected to the exhaust port of the engine.

[0025] According to the power system of this utility model, by setting the exhaust device of the second aspect embodiment above, and setting the exhaust turbofan of the first aspect above on the exhaust device, by setting the first turbofan and the intake port, the rotation of the first turbofan can drive the airflow in the outside air to enter the exhaust channel from the intake port, which can cool down the high temperature exhaust gas, thereby reducing the thermal damage of the high temperature exhaust gas to the components, and thus ensuring the service life of the components.

[0026] The vehicle according to a fourth aspect of the present invention includes a power system according to a third aspect of the present invention.

[0027] According to the exhaust device of this utility model, by setting the power system of the third aspect embodiment above, setting the exhaust device of the second aspect above on the power system, and setting the exhaust turbine fan of the first aspect above on the exhaust device, by setting the first turbine fan and the intake port, the rotation of the first turbine fan can drive the airflow in the outside air to enter the exhaust channel from the intake port, which can cool the high temperature exhaust gas, thereby reducing the heat damage of the high temperature exhaust gas to the components, and thus ensuring the service life of the components.

[0028] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of an exhaust device according to an embodiment of the present utility model;

[0030] Figure 2 It is along Figure 1 Sectional view of line AA in the middle;

[0031] Figure 3 yes Figure 2 A schematic diagram of the first turbofan shown;

[0032] Figure 4 yes Figure 2 A schematic diagram of the second turbofan at one angle shown in the figure;

[0033] Figure 5 yes Figure 4 Another angled schematic diagram of the second turbofan shown.

[0034] Figure label:

[0035] 100. Exhaust turbofan;

[0036] 10. Housing; 11. Air inlet; 12. Air outlet; 13. Exhaust passage; 14. Intake port; 15. Intake pipe;

[0037] 101. First paragraph; 102. Second paragraph; 103. Third paragraph;

[0038] 20. First turbofan; 21. Fan blades;

[0039] 30. Second turbofan; 31. Blade;

[0040] 40. Shaft;

[0041] 50. Bearings;

[0042] 60. Connecting reinforcement bars. Detailed Implementation

[0043] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0044] The following is a reference appendix. Figure 1-5 Description of an exhaust turbofan 100 according to an embodiment of the present invention.

[0045] Reference Figure 1 , Figure 2 and Figure 3 The exhaust turbofan 100 according to an embodiment of the present utility model is used in the exhaust device of a power system and includes: a housing 10 and a first turbofan 20.

[0046] Specifically, the housing 10 has an air inlet 11 and an air outlet 12, and an exhaust passage 13 communicating with the air inlet 11 and the air outlet 12. The air inlet 11 is adapted to communicate with the exhaust pipe of the exhaust device. The first turbofan 20 is rotatably disposed in the exhaust passage 13. The housing 10 also has an air intake 14, which communicates with the exhaust passage 13 and the external space. The first turbofan 20 is configured to drive air in the external space through the air intake 14 into the exhaust passage 13.

[0047] For example, such as Figure 1 , Figure 2 and Figure 3 As shown, the exhaust turbofan 100 can be connected in series at the middle of the exhaust pipe of the exhaust device, or at the end of the exhaust pipe of the exhaust device. The housing 10 extends in the left-right direction. The left end of the housing 10 is provided with an air inlet 11, and the right end of the housing 10 is provided with an air outlet 12. The air inlet 11 is connected to the exhaust pipe of the exhaust device. The housing 10 is provided with an air intake 14, and air from the external space can enter the exhaust channel 13 through the air intake 14. The first turbofan 20 drives the air from the external space to enter the exhaust channel 13 through the air intake 14 by rotation. Preferably, the first turbofan 20 can rotate under the drive of the driving device, or it can rotate under the propulsion of the airflow.

[0048] When the exhaust system is running, the high-temperature exhaust gas from the vehicle flows from the exhaust pipe of the exhaust system to the intake port 11 of the exhaust turbofan 100. Then the exhaust gas flows from the intake port 11 to the exhaust passage 13. At this time, the first turbofan 20 rotates and drives the air in the external space to enter the exhaust passage 13 from the intake port 14. The air in the external space mixes with the high-temperature exhaust gas, thereby reducing the temperature of the high-temperature exhaust gas.

[0049] The exhaust turbofan 100 of this invention, by setting a first turbofan 20 and an intake port 14, allows the rotation of the first turbofan 20 to drive airflow from the outside air into the exhaust passage 13 through the intake port 14. The outside air mixes with the high-temperature exhaust gas in the exhaust passage 13, cooling the exhaust gas and reducing heat damage to the end of the exhaust pipe, thus ensuring the service life of the exhaust pipe. Simultaneously, it reduces heat damage to components near the exhaust pipe at the bottom of the vehicle, ensuring vehicle safety. Furthermore, the entry of outside air into the exhaust passage 13 increases the gas pressure within it, thereby increasing the exhaust gas discharge speed and effectively improving the power output of the power system, ensuring vehicle power. Additionally, the pressurized exhaust mixture can be discharged further away from the exhaust pipe outlet, further mitigating heat damage.

[0050] Furthermore, the structure of this application is simple and can be adapted to vehicles with various power types, such as fuel vehicles or hybrid vehicles. It can be paired with various integrated exhaust forms, thereby improving the versatility of the exhaust turbofan 100.

[0051] According to the embodiment of the present invention, the exhaust turbofan 100, by setting a first turbofan 20 and an air intake 14, the rotation of the first turbofan 20 can drive the airflow in the outside air to enter the exhaust channel 13 from the air intake 14, which can cool the high-temperature exhaust gas, thereby reducing the heat damage of the high-temperature exhaust gas to the components and thus ensuring the service life of the components.

[0052] According to some embodiments of this utility model, refer to Figure 2 and Figure 3 The first turbofan 20 is configured to rotate under the impetus of the airflow entering the exhaust passage 13 from the intake port 11. Thus, the first turbofan 20 rotates by the impetus of the airflow, which is a non-powered structure, thereby reducing energy consumption. At the same time, this structure is simple and has few parts, making it easy to use in mass production.

[0053] For example, such as Figure 2 and Figure 3 As shown, the airflow flows from left to right through the air inlet 11 into the exhaust channel 13. The airflow in the exhaust channel 13 drives the first turbo fan 20 to rotate. The rotation of the first turbo fan 20 causes the air in the external space to enter the exhaust channel 13 from the air inlet 14.

[0054] According to some embodiments of this utility model, refer to Figure 2 and Figure 3The exhaust turbofan 100 includes a second turbofan 30, which is disposed within the exhaust passage 13. The second turbofan 30 is configured to rotate under the influence of airflow entering the exhaust passage 13 from the exhaust pipe. The second turbofan 30 is connected to a first turbofan 20 and drives the first turbofan 20 to rotate. Thus, under the action of the airflow in the exhaust pipe, the airflow drives the second turbofan 30 to rotate, which in turn drives the first turbofan 20 to rotate. The first turbofan 20 draws gas from the external space into the exhaust passage 13 through the intake port 14, thereby cooling and pressurizing the airflow within the exhaust passage 13. The resulting mixed airflow further drives the second turbofan 30 to rotate, causing the second turbofan 30 to drive the first turbofan 20 to rotate at a faster speed. This gradually increases the overall rotational speed, effectively ensuring the vehicle's exhaust speed when operating at high speeds.

[0055] Furthermore, such as Figure 2 and Figure 3 As shown, the airflow drives the second turbofan 30 to rotate, and the kinetic energy of the airflow is converted into the rotational energy of the second turbofan 30. This can consume the energy of the airflow and reduce the noise generated by the contact between the airflow and the second turbofan 30, thereby improving the comfort of the vehicle.

[0056] According to some optional embodiments of the present invention, refer to Figure 1 and Figure 2 The air inlet 11 and the air outlet 12 are respectively arranged on the housing 10 in the first direction (e.g., Figure 2 On both sides of the left and right direction (as shown) Figure 2 (As shown on the left and right sides of the casing 10), the exhaust channel 13 extends along a first direction, and the first turbofan 20 and the second turbofan 30 are arranged at intervals along the first direction within the exhaust channel 13. Thus, the air inlet 11 and the air outlet 12 are arranged reasonably, ensuring that the airflow can be normally discharged from the casing 10. Simultaneously, the reasonable extension direction of the exhaust channel 13 reduces the flow resistance of the airflow, thereby increasing the airflow velocity. Furthermore, the first turbofan 20 and the second turbofan 30 are arranged within the exhaust channel 13, allowing the airflow to convert its kinetic energy into the rotational energy of the second turbofan 30, effectively ensuring that the airflow can drive the second turbofan 30 to rotate.

[0057] For example, such as Figure 1 and Figure 2 As shown, the air inlet 11 is located on the left side of the housing 10, the air outlet 12 is located on the right side of the housing 10, the exhaust channel 13 extends in the left and right direction, and the first turbo fan 20 and the second turbo fan 30 are arranged at intervals in the exhaust channel 13 in the left and right direction.

[0058] According to some optional embodiments of the present invention, refer to Figure 2 , Figure 4and Figure 5 The second turbofan 30 includes multiple blades 31, meaning that the second turbofan 30 may include two, three, four, or more blades 31. These multiple blades 31 are arranged at circumferential intervals along the exhaust channel 13. In the direction of airflow within the exhaust channel 13, the blades 31 are aligned with the first direction (e.g., ...). Figure 2 The included angle (shown in the left and right directions) is less than or equal to 15°.

[0059] Therefore, by limiting the angle between the blade 31 and the first direction, the airflow can flow more closely to the surface of the blade 31, avoiding energy loss caused by boundary layer separation. This ensures that the flow energy of the airflow can be converted into the rotational energy of the second turbofan 30 to the maximum extent, thus ensuring the energy conversion efficiency of the airflow driving the second turbofan 30.

[0060] For example, such as Figure 2 , Figure 4 and Figure 5 As shown, the second turbofan 30 includes multiple blades 31, which are arranged at intervals along the circumference of the exhaust channel 13. The angle between the blades 31 and the left and right directions can be 15°, 14°, 13°, 12°, 11°, 10°, 9°, 8°, 7°, 6°, 5°, 4°, 3°, 2° or 1°.

[0061] According to some optional embodiments of the present invention, refer to Figure 2 and Figure 3 The first turbofan 20 includes multiple blades 21, meaning it can include two, three, four, or more blades 21, arranged circumferentially along the exhaust channel 13. This allows for more refined airflow segmentation, reducing localized airflow separation and resulting in more uniform airflow within the exhaust channel 13, thus reducing turbulence losses. Furthermore, the increased number of blades 21 allows for staged air compression, achieving a higher overall pressure ratio at the same rotational speed, thereby ensuring the velocity of the airflow exiting the exhaust channel 13.

[0062] According to some optional embodiments of the present invention, refer to Figure 2 and Figure 3 In the radially outward direction along the first turbofan 20, the width of the blade 21 gradually increases in the circumferential direction of the first turbofan 20. Therefore, when the engine is running at high speed, the first turbofan 20 can ensure that the airflow from the external space can flow normally through the intake port 14 to the exhaust passage 13.

[0063] When the engine of the power system starts to generate exhaust gas, the high-temperature exhaust gas enters the exhaust passage 13 through the intake port 11. The airflow first impacts the root of the fan blade 21 of the first turbofan 20, such as... Figure 3The inlet cross-sectional view of the first turbofan 20 shown shows that since the surface normal of the radial interior of the blade 21 is basically perpendicular to the airflow direction, i.e. the windward surface is small, the root of the blade 21 will not affect the back pressure of the system, and the airflow impact cannot generate enough thrust to drive the blade 21 to rotate.

[0064] After passing through the first turbofan 20, the airflow flows through the exhaust channel 13 to the second turbofan 30, such as... Figure 4 The inlet cross-sectional view of the second turbofan 30 shown shows that the blades 31 of the second turbofan 30 have a large windward surface. When the high-speed airflow impacts the blades 31, it generates a tangential thrust in the left-right direction, which drives the second turbofan 30 to rotate. The second turbofan 30 drives the first turbofan 20 to rotate. Since the width of the blades 21 gradually increases in the circumferential direction of the first turbofan 20 in the radial outward direction, the first turbofan 20 can drive the gas in the external space from the intake port 14 into the exhaust channel 13, thereby cooling the airflow in the exhaust channel 13.

[0065] According to some optional embodiments of the present invention, refer to Figure 2 and Figure 3 The fan blade 21 is perpendicular to the first direction (e.g. Figure 2 The projection of the fan blade 21 (in the left and right directions) forms a triangular sector shape. Therefore, the triangular sector structure is simple and easy to manufacture, thus improving the manufacturing efficiency of the fan blade 21. At the same time, when the engine is running at high speed, this structure can effectively ensure that the airflow can drive the fan blade 21.

[0066] For example, such as Figure 2 and Figure 3 As shown, in the radial outward direction along the first turbofan 20, the width of the blade 21 gradually increases in the circumferential direction of the first turbofan 20, and the projection of the blade 21 in the direction perpendicular to the left and right is formed into a triangular fan shape.

[0067] According to some embodiments of this utility model, refer to Figure 1 and Figure 2 The exhaust turbofan 100 also includes: a rotating shaft 40, which is disposed within the exhaust passage 13 and along a first direction (e.g., Figure 2 Extending in the left-right direction (as shown), the first turbofan 20 and the second turbofan 30 are both sleeved and fixed on the rotating shaft 40 and arranged at intervals in the first direction. Thus, the first turbofan 20 and the second turbofan 30 are connected by the rotating shaft 40. This transmission structure is simple, low in cost, and easy to use in mass production.

[0068] For example, such as Figure 1 and Figure 2 As shown, the rotating shaft 40 extends in the left and right direction. The first turbo fan 20 and the second turbo fan 30 are both sleeved on the rotating shaft 40. The first turbo fan 20 is located at the left end of the rotating shaft 40, and the second turbo fan 30 is located at the right end of the rotating shaft 40.

[0069] According to some optional embodiments of the present invention, refer to Figure 2 The exhaust turbofan 100 includes a bearing 50, which is disposed in the housing 10 and located within the exhaust channel 13. A rotating shaft 40 is rotatably supported on the bearing 50. Thus, the bearing 50 provides support for the rotating shaft 40, preventing it from wobbling within the exhaust channel 13, thereby ensuring the stability of the first turbofan 20 and the second turbofan 30. Simultaneously, the rotating shaft 40 is fixed to the housing 10 via the bearing 50, further ensuring its stability.

[0070] For example, such as Figure 2 As shown, the bearing 50 is located inside the housing 10. The bearing 50 is fixedly connected to the inner wall of the housing 10 through the connecting rib 60, and the rotating shaft 40 is rotatably supported on the bearing 50.

[0071] According to some embodiments of this utility model, refer to Figure 1 and Figure 2 The housing 10 is along the first direction (e.g.) Figure 2 The cylindrical shape extends in the left-right direction (as shown), with the air intake 14 and air inlet 11 located on the same side of the housing 10 in the first direction (e.g., as shown in the left-right direction). Figure 2 The air intake 14 is located on the left side of the housing 10 shown, and is arranged radially at intervals along the housing 10. The air intake 14 is located on the outer side of the air inlet 11 in the radial direction of the housing 10. Thus, the extension of the housing 10 is parallel to the extension direction of the exhaust channel 13, which facilitates the arrangement of the exhaust channel 13. At the same time, the reasonable position of the air intake 14 can effectively ensure that the air entering the exhaust channel 13 can be fully mixed with the high-temperature exhaust gas, thereby effectively reducing the temperature of the mixed gas in the exhaust channel 13.

[0072] For example, such as Figure 1 and Figure 2 As shown, the housing 10 is a cylindrical shape extending in the left and right direction. The air intake 14 and the air inlet 11 are located on the left side of the housing 10 and are arranged at intervals along the radial direction of the housing 10. The air intake 14 is located on the outer side of the air inlet 11 in the radial direction of the housing 10.

[0073] Furthermore, such as Figure 1 and Figure 2 As shown, the air intake 14 can be located on the left end face of the housing 10 and penetrate the housing 10 in the left-right direction. Alternatively, the air intake 14 can be located on the side of the housing 10 in the circumferential direction and penetrate the housing 10 in the radial direction. Thus, a reasonable opening position can be selected according to actual needs, thereby ensuring that the external air can be fully mixed with the high-temperature exhaust gas.

[0074] According to some optional embodiments of the present invention, refer to Figure 2and Figure 3 The housing 10 includes an intake pipe 15, which passes through an intake port 11. One end of the intake pipe 15 extends into an exhaust passage 13, and an intake port 14 is located radially outside the intake pipe 15. Thus, the intake pipe 15 facilitates the connection between the housing 10 and the muffler, reducing the difficulty of directly connecting the housing 10 and the muffler. Simultaneously, the end of the intake pipe 15 extending into the exhaust passage 13 prevents high-temperature exhaust gas from leaking from the intake port 11.

[0075] For example, such as Figure 2 and Figure 3 As shown, the intake pipe 15 passes through the intake port 11, and the right end of the intake pipe 15 extends into the exhaust channel 13. The intake port 14 is located on the radial outer side of the intake pipe 15 and is located on the side of the housing 10 in the circumferential direction. The intake port 14 penetrates the housing 10 radially.

[0076] According to some optional embodiments of the present invention, refer to Figure 1 and Figure 2 The first turbofan 20 is located at the end near the intake pipe 15 (e.g. Figure 2 The intake pipe 15 shown is located at the left end. Thus, when the high-temperature exhaust gas in the exhaust pipe enters the exhaust channel 13 from the intake pipe 15, when the first turbofan 20 rotates, the outside air can directly mix with the high-temperature exhaust gas at the end of the intake pipe 15, so that the outside air and the high-temperature exhaust gas can be fully mixed, thereby effectively cooling the high-temperature exhaust gas.

[0077] According to some embodiments of this utility model, refer to Figure 1 and Figure 2 The housing 10 is a cylindrical shape extending along a first direction. The housing 10 includes a first segment 101, a second segment 102, and a third segment 103 sequentially connected along the first direction. In the direction from the first segment 101 to the third segment 103, the cross-sectional area of ​​the second segment 102 gradually decreases. An air inlet 11 is formed on the end face of the first segment 101 facing away from the second segment 102 (e.g., ...). Figure 2 On the left end face of the first segment 101 shown, the end of the third segment 103 facing away from the second segment 102 (as shown) Figure 2 The right end of the third segment 103 shown is open to form an air outlet 12.

[0078] In this way, the shell 10 is cylindrical, and without additional processing, it can form an air inlet 11, an air outlet 12, and an exhaust channel 13. At the same time, the air inlet 11 and the air outlet 12 are reasonably positioned, which can facilitate the flow of air in the shell 10. Furthermore, the cross-sectional area of ​​the second section 102 gradually decreases. When the airflow flows from the first section 101 to the third section 103, the airflow velocity can be significantly increased through the cross-sectional contraction, which can effectively increase the thrust of the high-temperature exhaust gas to drive the second turbofan 30 to rotate, thereby ensuring the rotational speed of the second turbofan 30.

[0079] For example, such as Figure 1 and Figure 2 As shown, the housing 10 is a cylindrical shape extending in the left-right direction. The housing 10 includes a first section 101, a second section 102 and a third section 103 connected sequentially in the left-right direction. In the direction from left to right, the cross-sectional area of ​​the second section 102 gradually decreases. The air inlet 11 is formed at the left end of the first section 101 and the air outlet 12 is formed at the right end of the third section 103.

[0080] According to the exhaust device of the second aspect embodiment of the present utility model, referring to... Figure 1 , Figure 2 and Figure 3 It includes: an exhaust pipe, a muffler, and an exhaust turbofan 100 of the first aspect of this embodiment. The muffler is connected in series to the exhaust pipe; the exhaust turbofan 100 is connected in series to the exhaust pipe and located downstream of the muffler, or the exhaust turbofan 100 is connected to the outlet end of the exhaust pipe.

[0081] For example, the exhaust pipe extends along the front-rear direction of the vehicle, the muffler is connected in series on the exhaust pipe, and the exhaust turbofan 100 is connected in series on the exhaust pipe and located downstream of the muffler.

[0082] It should be noted that the exhaust turbofan 100 is connected in series with the exhaust pipe, which can reduce the heat damage to the end of the exhaust pipe caused by high-temperature exhaust gas. The exhaust turbofan 100 is connected to the outlet end of the exhaust pipe, which can reduce the heat damage to the bottom structure of the vehicle caused by high-temperature exhaust gas.

[0083] According to the exhaust device of the present invention, by providing the exhaust turbofan 100 of the first aspect embodiment, and by providing the first turbofan 20 and the intake port 14, the rotation of the first turbofan 20 can drive the airflow in the outside air to enter the exhaust channel 13 from the intake port 14, which can cool the high-temperature exhaust gas, thereby reducing the heat damage of the high-temperature exhaust gas to the components, and thus ensuring the service life of the components.

[0084] According to the power system of the third aspect embodiment of the present utility model, referring to... Figure 1 and Figure 2 It includes an engine and an exhaust device according to the second aspect of this embodiment, wherein the inlet end of the exhaust pipe is connected to the exhaust port of the engine.

[0085] For example, the engine's exhaust gas can be transmitted to the exhaust pipe through the exhaust port, and after passing through the catalytic converter and muffler, the exhaust gas flows to the exhaust turbofan 100.

[0086] According to the power system of the present invention, by providing the exhaust device of the second aspect embodiment, the exhaust turbofan 100 of the first aspect is provided on the exhaust device. By providing the first turbofan 20 and the intake port 14, the rotation of the first turbofan 20 can drive the airflow in the outside air to enter the exhaust channel 13 from the intake port 14, which can cool the high-temperature exhaust gas, thereby reducing the thermal damage of the high-temperature exhaust gas to the components and ensuring the service life of the components.

[0087] The vehicle according to the fourth aspect embodiment of the present utility model, referring to Figure 1 , Figure 2 and Figure 3 This includes the power system described in the third aspect of this embodiment. It should be noted that the vehicle can be a gasoline-powered vehicle or a hybrid vehicle.

[0088] According to the vehicle of the present invention, by providing the power system of the third aspect embodiment, the exhaust device of the second aspect embodiment is provided on the power system, and the exhaust turbofan 100 of the first aspect is provided on the exhaust device. By providing the first turbofan 20 and the intake port 14, the rotation of the first turbofan 20 can drive the airflow in the outside air to enter the exhaust passage 13 from the intake port 14, which can cool the high-temperature exhaust gas, thereby reducing the heat damage of the high-temperature exhaust gas to the components and ensuring the service life of the components.

[0089] The following is in conjunction with the appendix Figure 1-5 Describe a specific embodiment of a vehicle.

[0090] When the vehicle is running, the engine runs and produces high-temperature exhaust gas. The high-temperature exhaust gas flows through the engine's exhaust port to the exhaust pipe of the exhaust system. The high-temperature exhaust gas flows through the exhaust pipe to the muffler on the exhaust pipe. Then, the high-temperature exhaust gas flows from the muffler to the intake pipe 15, and then flows through the intake pipe 15 to the exhaust passage 13.

[0091] If the engine operating power is low, the flow rate of high-temperature exhaust gas is low. The high-temperature exhaust gas passes through the gap between the blades 21 at the radial inner end of the first turbofan 20, and then flows to the right to the second turbofan 30. The high-temperature exhaust gas contacts the blades 31 of the second turbofan 30, driving the second turbofan 30 to rotate. The second turbofan 30 drives the first turbofan 20 to rotate through the rotating shaft 40. The rotation of the first turbofan 20 causes air in the external space to flow into the exhaust channel 13, so that the external air and the high-temperature exhaust gas are fully mixed in the exhaust channel 13 to reduce the temperature of the high-temperature exhaust gas. At the same time, the external air increases the pressure in the exhaust channel 13, and the mixed gas will generate greater thrust on the second turbofan 30, thereby increasing the overall speed of the first turbofan 20 and the second turbofan 30.

[0092] If the engine has a high operating power and a large flow rate of high-temperature exhaust gas, the high-temperature exhaust gas can directly drive the first turbofan 20 and the second turbofan 30 to rotate. If the engine speed continues to increase, the rotation speed of the first turbofan 20 and the second turbofan 30 components will increase with the increase of exhaust gas flow rate, drawing in more ambient temperature air into the passage to mix with the high-temperature exhaust gas and cool it down. Therefore, it can effectively reduce the heat damage of high-temperature exhaust gas to the vehicle.

[0093] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to 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 of this utility model.

[0094] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0095] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0096] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0097] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An exhaust turbofan (100) for use in the exhaust system of a power system, characterized in that, include: The housing (10) has an air inlet (11) and an air outlet (12), and an exhaust passage (13) communicating with the air inlet (11) and the air outlet (12), wherein the air inlet (11) is adapted to communicate with the exhaust pipe of the exhaust device; The first turbofan (20) is rotatably disposed within the exhaust passage (13); The housing (10) is also provided with an air intake (14), which connects the exhaust passage (13) and the external space. The first turbofan (20) is configured to drive air in the external space through the air intake (14) into the exhaust passage (13).

2. The exhaust turbofan (100) according to claim 1, characterized in that, The first turbofan (20) is configured to rotate under the influence of airflow entering the exhaust passage (13) from the air inlet (11).

3. The exhaust turbofan (100) according to claim 1, characterized in that, include: A second turbofan (30) is disposed within the exhaust passage (13) and is configured to rotate under the influence of airflow entering the exhaust passage (13) through the exhaust pipe. The second turbofan (30) is connected to the first turbofan (20) and is used to drive the first turbofan (20) to rotate.

4. The exhaust turbofan (100) according to claim 3, characterized in that, The air inlet (11) and the air outlet (12) are respectively arranged on both sides of the housing (10) in the first direction, the exhaust channel (13) extends along the first direction, and the first turbofan (20) and the second turbofan (30) are arranged at intervals in the exhaust channel (13) along the first direction.

5. The exhaust turbofan (100) according to claim 4, characterized in that, The second turbofan (30) includes a plurality of blades (31) arranged at circumferential intervals along the exhaust passage (13). In the direction of airflow within the exhaust channel (13), the angle between the blade (31) and the first direction is less than or equal to 15°.

6. The exhaust turbofan (100) according to claim 4, characterized in that, The first turbofan (20) includes a plurality of blades (21) arranged at circumferential intervals along the exhaust passage (13).

7. The exhaust turbofan (100) according to claim 6, characterized in that, In the radially outward direction along the first turbofan (20), the width of the blade (21) gradually increases in the circumferential direction of the first turbofan (20).

8. The exhaust turbofan (100) according to claim 7, characterized in that, The fan blade (21) is projected into a triangular fan shape in a direction perpendicular to the first direction.

9. The exhaust turbofan (100) according to claim 3, characterized in that, Also includes: A rotating shaft (40) is disposed in the exhaust channel (13) and extends along a first direction. The first turbofan (20) and the second turbofan (30) are both sleeved and fixed on the rotating shaft (40) and are arranged at intervals in the first direction.

10. The exhaust turbofan (100) according to claim 9, characterized in that, include: The bearing (50) is disposed in the housing (10) and located in the exhaust channel (13), and the shaft (40) is rotatably supported on the bearing (50).

11. The exhaust turbofan (100) according to any one of claims 1-10, characterized in that, The housing (10) is a cylindrical shape extending along a first direction. The air intake (14) and the air inlet (11) are located on the same side of the housing (10) in the first direction and are arranged at radial intervals along the housing (10). The air intake (14) is located on the outer side of the air inlet (11) in the radial direction of the housing (10).

12. The exhaust turbofan (100) according to claim 11, characterized in that, The housing (10) includes an air inlet pipe (15) that passes through the air inlet (11), one end of which extends into the exhaust channel (13), and the air intake (14) is located radially outside the air inlet pipe (15).

13. The exhaust turbofan (100) according to claim 12, characterized in that, The first turbofan (20) is located near one end of the intake pipe (15).

14. The exhaust turbofan (100) according to any one of claims 1-10, characterized in that, The shell (10) is a cylindrical shape extending along a first direction. The shell (10) includes a first segment (101), a second segment (102), and a third segment (103) connected sequentially along the first direction. In the direction from the first segment (101) to the third segment (103), the cross-sectional area of ​​the second segment (102) gradually decreases. The air inlet (11) is formed on the end face of the first segment (101) opposite to the second segment (102), and the end of the third segment (103) opposite to the second segment (102) is open to form the air outlet (12).

15. An exhaust device, characterized in that, include: Exhaust pipe; A muffler, wherein the muffler is connected in series on the exhaust pipe; The exhaust turbofan (100) according to any one of claims 1-14, wherein the exhaust turbofan (100) is connected in series to the exhaust pipe and located downstream of the muffler, or the exhaust turbofan (100) is connected to the outlet end of the exhaust pipe.

16. A power system, characterized in that, include: engine; The exhaust device of claim 15, wherein the inlet end of the exhaust pipe is connected to the exhaust port of the engine.

17. A vehicle, characterized in that, Includes the power system described in claim 16.

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