High-temperature exhaust leading-out device of high-power engine

Abstract

The invention provides a high-power engine high-temperature exhaust leading-out device which comprises a main exhaust pipe connected with an outer wall and a butt joint pipe connected with an engine to be detected and the main exhaust pipe, and the main exhaust pipe and the butt joint pipe are communicated with each other and form an exhaust pipeline for leading out exhaust gas. The butt joint pipe comprises at least two telescopic hoses, the bottom ends of the telescopic hoses are connected with a smoke exhaust pipe connector of the engine to be detected, and the tops of the telescopic hoses are connected with a main exhaust pipe. The main exhaust pipe comprises a first exhaust pipe body, a second exhaust pipe body, a third exhaust pipe body and an exhaust elbow, and the first exhaust pipe body, the second exhaust pipe body, the third exhaust pipe body and the exhaust elbow are sequentially arranged in the smoke circulation sequence and communicate with one another. Therefore, a smoke exhaust system actively matched with different engine test models is formed.

Description

Technical Field

[0001] This invention relates to the field of exhaust gas emission technology, and more specifically to a high-power engine high-temperature exhaust outlet device. Background Technology

[0002] Indoor bench performance testing of high-power engines is a key step in R&D verification and factory hot testing. In such tests, manufacturers need to invest a lot of manpower and resources to build engine test benches to test the load capacity of high-power engines by simulating the engine's working environment. Since the engine will produce exhaust gas at temperatures up to 600°C, it is necessary to use an independent and professional exhaust pipe (diameter ≥ 500mm) to ensure that the high-temperature exhaust gas is discharged outdoors without leakage.

[0003] However, due to the different power and exhaust parameters of different engine models, the diameter and spatial position of their exhaust pipe interfaces also vary. However, the laboratory usually only equips the exhaust main with a universal interface. This means that when switching test models, the exhaust main must be frequently disassembled and installed, resulting in high workload and low efficiency. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, the present invention proposes a high-power engine high-temperature exhaust outlet device, including a main exhaust pipe connected to the outer wall and a connecting pipe connecting the engine to be tested and the main exhaust pipe. The main exhaust pipe and the connecting pipe are interconnected and form an exhaust pipe for discharging exhaust gas. The connecting pipe includes at least two telescopic hoses, the bottom end of which is connected to the exhaust pipe interface of the engine to be tested, and the top end of which is connected to the main exhaust pipe. The main exhaust pipe includes a first exhaust pipe, a second exhaust pipe, a third exhaust pipe, and an exhaust elbow, which are arranged sequentially and interconnected along the flue gas flow sequence. The bottom of the first exhaust pipe is connected to the top of at least two telescopic hoses, the top of the first exhaust pipe is rotatably connected to the front end of the second exhaust pipe, the end of the second exhaust pipe is connected to the side wall of the third exhaust pipe, the top of the third exhaust pipe is connected to an exhaust elbow, and the end of the third exhaust pipe is rotatably connected to a fixed base. The first exhaust pipe and the second exhaust pipe form a first rotating pair, and the fixed base and the third exhaust pipe form a second rotating pair. The first rotating pair and the second rotating pair cooperate to form a position-adjustable cantilever structure.

[0005] To achieve the above objectives, a smoke exhaust system that actively adapts to different engine test models is formed by the cooperation of the connecting pipe, the first exhaust pipe, the second exhaust pipe, the third exhaust pipe, and the exhaust elbow. Through the cooperation of the first rotating joint and the second rotating joint, the air inlet end of the first exhaust pipe can achieve a large-range flexible positioning in the horizontal plane using polar coordinates. This allows for active, accurate, and rapid adaptation to the different smoke exhaust interface positions of different engine test models, eliminating the need for repeated shutdowns to disassemble and install the large-diameter main pipe, thus improving testing efficiency.

[0006] In addition, the use of at least two flexible hoses in conjunction with the adjustable exhaust pipe provides tolerance for engine docking, reduces the difficulty of operation and the accuracy requirements for alignment, and ensures the structural rigidity and reliability of this application while reducing manufacturing and maintenance costs.

[0007] Furthermore, the second exhaust pipe and the third exhaust pipe are fixedly connected by a rotary cantilever beam, and the two ends of the rotary cantilever beam are respectively provided with a first adjustment component and a second adjustment component to adjust the rotation angle of the second exhaust pipe and the third exhaust pipe.

[0008] Furthermore, the first adjustment component includes a first gear that is arranged around the first exhaust pipe and coaxially fixed with the first exhaust pipe. A mounting base is provided on the rotary cantilever beam. A second gear that meshes with the first gear is rotatably connected to the mounting base. A drive motor that drives the second gear to rotate is also fixed on the mounting base. The structure of the second adjustment component is the same as that of the first adjustment component.

[0009] Furthermore, the mounting base is disposed on a sliding platform, which is slidably connected to the rotary cantilever beam and is equipped with bolts connecting the sliding platform and the rotary cantilever beam.

[0010] Furthermore, the first exhaust pipe is connected to the second exhaust pipe, and the third exhaust pipe is connected to the exhaust elbow via a graphite rotary sealing flange.

[0011] Furthermore, the exhaust elbow is embedded in the wall, and the outlet end of the exhaust elbow extends to the outside of the wall; the outlet end of the exhaust elbow located on the outside of the wall is connected to a vertically arranged tee pipe, and the tee pipe has an upward top opening and a downward bottom opening, with the top opening serving as the main exhaust port.

[0012] Furthermore, an anti-backflow structure is connected to the top of the tee pipe.

[0013] Furthermore, the anti-backflow structure includes a wind deflector located directly above the top opening of the tee pipe; the wind deflector is a streamlined airfoil structure, with its upper curved surface being a convex arc surface with continuously varying curvature, and its lower curved surface being a relatively gentle concave arc surface or a slightly convex arc surface; a transverse connecting rod is fixedly connected to the tail of the wind deflector, and a vertical air guide plate is fixed to the other end of the connecting rod; the wind deflector is connected to the tee pipe through a connecting assembly.

[0014] Furthermore, the connecting assembly includes an I-shaped bracket, the bottom crossbar of the I-shaped bracket is disposed inside the tee pipe and rotatably connected to the tee pipe, the vertical bar of the I-shaped bracket extends out of the top opening of the tee pipe, and the top crossbar of the I-shaped bracket is located inside the wind baffle and fixed to the inner wall of the wind baffle.

[0015] Furthermore, an annular limiting boss is fixed to the inner wall of the tee pipe, and the annular limiting boss is located above the bottom crossbar of the I-shaped bracket.

[0016] In summary, this high-power engine high-temperature exhaust outlet device has the following beneficial effects: This high-power engine high-temperature exhaust outlet device, through the cooperation of the connecting pipe, the first exhaust pipe, the second exhaust pipe, the third exhaust pipe and the exhaust elbow, forms an exhaust system that actively adapts to different engine test models. Through the cooperation of the first rotating joint and the second rotating joint, the air inlet end of the first exhaust pipe can achieve a large range of flexible positioning in the horizontal plane using polar coordinates. This allows it to actively, accurately and quickly adapt to the different exhaust interface positions of different engine test models, eliminating the need for repeated shutdowns to disassemble and install large-diameter main pipes, thus improving testing efficiency.

[0017] The high-power engine high-temperature exhaust outlet device has an upper curved surface with continuously varying curvature on the baffle plate, which is used to accelerate the airflow flowing above it to form a low-pressure zone. The lower curved surface is a relatively gentle concave or slightly convex arc surface, which is opposite to the top opening of the three-way pipe, and is used to guide the exhaust gas to be discharged smoothly. It converts the parallel wind energy into a continuous negative pressure covering the exhaust port, reducing the risk of backflow of external strong winds or the formation of vortices at the top opening of the three-way pipe that affect the air volume. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] The invention will now be further described and explained with reference to the accompanying drawings.

[0020] Figure 1This is a schematic diagram of the overall structure of the preferred embodiment of the present invention; Figure 2 This is a structural schematic diagram illustrating the wind deflector of the preferred embodiment of the present invention; Figure 3 This is the preferred embodiment of the present invention. Figure 2 Enlarged structural diagram at point A in the middle; Figure 4 This is a structural schematic diagram illustrating the air guide plate according to the preferred embodiment of the present invention; Figure 5 This is a schematic diagram illustrating the structure of the annular limiting boss in the preferred embodiment of the present invention.

[0021] Reference numerals: 1. Exterior wall; 2. Main exhaust pipe; 3. Telescopic flexible hose; 4. First exhaust pipe; 5. Second exhaust pipe; 6. Third exhaust pipe; 7. Exhaust elbow; 8. Rotary cantilever beam; 9. First gear; 10. Mounting base; 11. Second gear; 12. Drive motor; 13. Graphite rotary sealing flange; 14. T-pipe; 15. Wind baffle; 16. Connecting rod; 17. Air guide plate; 18. I-beam bracket; 19. Annular limiting boss. Detailed Implementation

[0022] The technical solution of the present invention will be more clearly and completely explained below with reference to the accompanying drawings and through the description of preferred embodiments of the present invention.

[0023] like Figure 1 As shown, the high-power engine high-temperature exhaust outlet device of the preferred embodiment of the present invention includes a main exhaust pipe 2 connected to an outer wall 1 and a connecting pipe connecting the engine to be tested and the main exhaust pipe 2. The main exhaust pipe 2 and the connecting pipe are interconnected and form an exhaust pipe for discharging exhaust gas. The connecting pipe includes at least two flexible hoses 3. The bottom end of the flexible hoses 3 is connected to the exhaust pipe interface of the engine to be tested, and the top end of the flexible hoses 3 is connected to the main exhaust pipe 2. The main exhaust pipe 2 includes a first exhaust pipe 4, a second exhaust pipe 5, and a third exhaust pipe 6, arranged sequentially and interconnected along the exhaust gas flow sequence. Three exhaust pipes 6 and exhaust elbows 7; the bottom of the first exhaust pipe 4 is connected to the top of at least two telescopic hoses 3, the top of the first exhaust pipe 4 is rotatably connected to the front end of the second exhaust pipe 5, the end of the second exhaust pipe 5 is connected to the side wall of the third exhaust pipe 6, the top of the third exhaust pipe 6 is connected to the exhaust elbow 7, and the end of the third exhaust pipe 6 is rotatably connected to a fixed base; the first exhaust pipe 4 and the second exhaust pipe 5 form a first rotating pair, the fixed base and the third exhaust pipe 6 form a second rotating pair, and the first rotating pair and the second rotating pair cooperate to form a position-adjustable cantilever structure.

[0024] By connecting the manifold, the first exhaust pipe 4, the second exhaust pipe 5, the third exhaust pipe 6, and the exhaust elbow 7, a smoke exhaust system that actively adapts to different engine test models is formed. Through the cooperation of the first rotating joint and the second rotating joint, the air inlet end of the first exhaust pipe 4 can achieve a wide range of flexible positioning in the horizontal plane using polar coordinates. This allows for active, accurate, and rapid adaptation to the different smoke exhaust interface positions of different engine test models, eliminating the need for repeated shutdowns to disassemble and install large-diameter main pipes, thus improving testing efficiency.

[0025] In addition, the use of at least two flexible hoses 3 in conjunction with the adjustable exhaust pipe provides tolerance for engine docking, reduces the difficulty of operation and the accuracy requirements for alignment, and ensures the structural rigidity and reliability of this application while reducing manufacturing and maintenance costs.

[0026] The slewing cantilever beam 8 can bear the weight of the connecting pipe, the first exhaust pipe 4, the second exhaust pipe 5, the third exhaust pipe 6 and the exhaust elbow 7, while avoiding the impact of thermal expansion and contraction of the exhaust pipe on the rigidity and strength of the slewing cantilever beam 8.

[0027] The second exhaust pipe 5 and the third exhaust pipe 6 are fixedly connected by a rotary cantilever beam 8, and the two ends of the rotary cantilever beam 8 are respectively provided with a first adjustment component and a second adjustment component to adjust the rotation angle of the second exhaust pipe 5 and the third exhaust pipe 6.

[0028] The first adjustment component includes a first gear 9 that is arranged around the first exhaust pipe 4 and coaxially fixed with the first exhaust pipe 4. A mounting base 10 is provided on the rotary cantilever beam 8. A second gear 11 that meshes with the first gear 9 is rotatably connected to the mounting base 10. A drive motor 12 that drives the second gear 11 to rotate is also fixed on the mounting base 10. The structure of the second adjustment component is the same as that of the first adjustment component.

[0029] Powered by an electric motor, the gear pair consisting of the first gear 9 and the second gear 11 is driven to achieve controllable adjustment of the rotation angle of the first exhaust pipe 4, which improves the retention and stability of the exhaust pipe after adjustment and reduces the risk of leakage caused by position drift.

[0030] Mounting base 10 is mounted on a slide platform, which is slidably connected to the rotary cantilever beam 8 and is equipped with bolts connecting the slide platform and the rotary cantilever beam 8. Mounting base 10 is mounted on the slide platform, and by adjusting the radial position of the motor, the center distance between the two gears is finely adjusted to compensate for the meshing clearance of the first gear 9 and the second gear 11.

[0031] The first exhaust pipe 4, the second exhaust pipe 5, and the third exhaust pipe 6 are all connected to the exhaust elbow 7 via a graphite rotary sealing flange 13. The graphite rotary sealing flange 13 can withstand the high-temperature exhaust gas of the system while providing relative rotational freedom for the two pipe fittings it connects to and maintaining a dynamic seal.

[0032] The flexible hose 3 is a thin-walled metal corrugated pipe. The thin-walled metal corrugated pipe can withstand the high-temperature exhaust gas from the engine, and at the same time has good flexibility and deformation ability, which can compensate for the misalignment between the exhaust pipe and the engine interface.

[0033] The exhaust elbow 7 is embedded in the wall, and the outlet end of the exhaust elbow 7 extends to the outside of the wall; the outlet end of the exhaust elbow 7 located on the outside of the wall is connected to a vertically arranged tee pipe 14, and the tee pipe 14 has an upward top opening and a downward bottom opening, with the top opening serving as the main exhaust port.

[0034] The exhaust elbow 7 is embedded in the wall, absorbing the vibration and torque generated by the movable pipe sections of the first exhaust pipe 4 and the third exhaust pipe 6, thus improving stability and reliability. It is suitable for multi-story factory buildings, reducing exhaust costs. The top opening of the tee pipe 14 is used as the main exhaust port, utilizing the inherent thermal buoyancy effect of high-temperature exhaust gas to provide additional driving force for exhaust gas discharge. In addition, workers can check the internal carbon deposits or foreign objects through the bottom opening of the tee pipe 14 and perform unblocking operations, achieving non-destructive maintenance.

[0035] A backflow prevention structure is connected to the top of the tee pipe 14. The backflow prevention structure includes a wind deflector 15 located directly above the opening at the top of the tee pipe 14; the wind deflector 15 is a streamlined airfoil structure, with its upper curved surface being a convex arc surface with continuously changing curvature, and its lower curved surface being a relatively gentle concave arc surface or a slightly convex arc surface; a horizontal connecting rod 16 is fixedly connected to the tail of the wind deflector 15, and a vertical air guide plate 17 is fixed to the other end of the connecting rod 16; the wind deflector 15 is connected to the tee pipe 14 through a connecting assembly.

[0036] The upper curved surface of the baffle plate 15 is a convex arc surface with continuously changing curvature, which is used to accelerate the airflow flowing above it to form a low-pressure area. The lower curved surface is a relatively gentle concave arc surface or a slightly convex arc surface, which is opposite to the top opening of the three-way pipe 14, and is used to guide the exhaust gas to be discharged smoothly, converting the parallel wind energy into a continuous negative pressure covering the exhaust port, reducing the risk of backflow of external strong winds or the formation of vortices at the top opening of the three-way pipe 14 affecting the air volume.

[0037] The connecting assembly includes an I-shaped bracket 18, the bottom horizontal bar of the I-shaped bracket 18 is disposed inside the tee pipe 14 and is rotatably connected to the tee pipe 14, the vertical bar of the I-shaped bracket 18 extends out of the top opening of the tee pipe 14, and the top horizontal bar of the I-shaped bracket 18 is located inside the wind baffle 15 and is fixed to the inner wall of the wind baffle 15.

[0038] The I-shaped bracket 18 connects the T-pipe 14 and the wind deflector 15 without affecting the rotation of the wind deflector 15. It is suitable for strong winds in different wind directions and enhances the bending, shearing and stability of the wind deflector 15 under strong winds. The top crossbar is hidden inside the wind deflector 15 and fixed, avoiding aerodynamic shape damage caused by the top crossbar being connected to the streamlined airfoil outer surface.

[0039] The inner wall of the tee pipe 14 is fixed with an annular limiting boss 19, which is located outside the bottom crossbar of the I-shaped bracket 18. When the system is subjected to a large upward wind load, the bottom crossbar moves upward and abuts against the anti-detachment ring, reducing the risk of the wind deflector 15 falling off in strong winds.

[0040] In use, the drive motor 12 provides power to control the rotation of the second gear 11 connected to it, which in turn drives the first gear 9 meshing with the second gear 11 to rotate, thereby realizing the rotation of the first exhaust pipe or the third exhaust pipe. This allows the air inlet end of the first exhaust pipe 4 to achieve a wide range of flexible positioning in the horizontal plane using polar coordinates, so that the connecting pipe can actively, accurately and quickly adapt to the different exhaust port positions of different engine test models. The high-temperature exhaust gas generated by the high-power engine passes sequentially through the telescopic hose 3, the first exhaust pipe 4, the second exhaust pipe 5, the third exhaust pipe 6, the exhaust elbow 7, and the tee pipe 14, and is discharged from the outlet of the tee pipe 14. When there is strong wind, and the wind direction deviates from the wind deflector 15, the wind guide 17 is blown to rotate. The rotation of the wind guide 17 drives the connecting rod 16 and the wind guide 17 to rotate until the wind is directly facing the wind deflector 15. The airflow above it is accelerated to form a low-pressure zone, which guides the exhaust gas to be discharged smoothly, reducing the backflow of strong wind or the formation of flow at the outlet position that affects the air volume. At the same time, the size of the wind deflector 15 and the size of the outlet of the three-way pipe 14 reduce the impact of rainwater on the device. Insect screens are provided on the top and bottom openings of the three-way pipe 14.

[0041] The above-described specific embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Various modifications, substitutions, and improvements made by those skilled in the art to the technical solutions of the present invention based on the provided textual description and drawings, without departing from the design concept and spirit of the present invention, should all fall within the scope of protection of the present invention. The scope of protection of the present invention is determined by the claims.

Claims

1. A high-power engine high-temperature exhaust outlet device, characterized in that, It includes a main exhaust pipe (2) connected to the outer wall (1) and a connecting pipe connecting the engine to be tested and the main exhaust pipe (2). The main exhaust pipe (2) and the connecting pipe are interconnected and form an exhaust pipe for discharging exhaust gas. The connecting pipe includes at least two telescopic hoses (3), the bottom end of which is connected to the exhaust pipe interface of the engine to be tested, and the top of which is connected to the main exhaust pipe (2). The main exhaust pipe (2) includes a first exhaust pipe (4), a second exhaust pipe (5), a third exhaust pipe (6) and an exhaust elbow (7) arranged sequentially and interconnected along the flue gas flow sequence. The bottom of the first exhaust pipe (4) is connected to the top of at least two telescopic hoses (3), the top of the first exhaust pipe (4) is rotatably connected to the front end of the second exhaust pipe (5), the end of the second exhaust pipe (5) is connected to the side wall of the third exhaust pipe (6), the top of the third exhaust pipe (6) is connected to the exhaust elbow (7), and the end of the third exhaust pipe (6) is rotatably connected to a fixed base. The first exhaust pipe (4) and the second exhaust pipe (5) form a first rotating pair, and the fixed base and the third exhaust pipe (6) form a second rotating pair. The first rotating pair and the second rotating pair cooperate to form a cantilever structure with adjustable position.

2. The high-power engine high-temperature exhaust outlet device according to claim 1, characterized in that, The second exhaust pipe (5) and the third exhaust pipe (6) are fixedly connected by a rotary cantilever beam (8), and the two ends of the rotary cantilever beam (8) are respectively provided with a first adjustment component and a second adjustment component to adjust the rotation angle of the second exhaust pipe (5) and the third exhaust pipe (6).

3. The high-power engine high-temperature exhaust outlet device according to claim 2, characterized in that, The first adjustment component includes a first gear (9) that is arranged around the first exhaust pipe (4) and coaxially fixed with the first exhaust pipe (4). A mounting seat (10) is provided on the rotary cantilever beam (8). A second gear (11) that meshes with the first gear (9) is rotatably connected to the mounting seat (10). A drive motor (12) that drives the second gear (11) to rotate is also fixed on the mounting seat (10). The structure of the second adjustment component is the same as that of the first adjustment component.

4. The high-power engine high-temperature exhaust outlet device according to claim 3, characterized in that, The mounting base (10) is located on a slide, which is slidably connected to the rotary cantilever beam (8) and is equipped with bolts connecting the slide and the rotary cantilever beam (8).

5. A high-power engine high-temperature exhaust outlet device according to claim 1, characterized in that, The first exhaust pipe (4) and the second exhaust pipe (5), as well as the third exhaust pipe (6) and the exhaust elbow (7), are all connected by a graphite rotary sealing flange (13).

6. The high-power engine high-temperature exhaust outlet device according to claim 1, characterized in that, The exhaust elbow (7) is embedded in the wall, and the outlet end of the exhaust elbow (7) extends to the outside of the wall; The exhaust elbow (7) is connected to a vertically arranged tee pipe (14) at the outlet end on the outside of the wall. The tee pipe (14) has an upward top opening and a downward bottom opening, with the top opening serving as the main exhaust port.

7. A high-power engine high-temperature exhaust outlet device according to claim 6, characterized in that, The top of the tee pipe (14) is connected to an anti-backflow structure.

8. A high-power engine high-temperature exhaust outlet device according to claim 7, characterized in that, The anti-backflow structure includes a windbreak plate (15) located directly above the top opening of the tee pipe (14). The wind deflector (15) is a streamlined airfoil structure. Its upper curved surface is a convex arc surface with continuously changing curvature, and its lower curved surface is a relatively gentle concave arc surface or a slightly convex arc surface. A horizontal connecting rod (16) is fixedly connected to the tail of the wind deflector (15), and a vertical wind guide plate (17) is fixed to the other end of the connecting rod (16). The wind deflector (15) is connected to the tee pipe (14) via a connecting assembly.

9. A high-power engine high-temperature exhaust outlet device according to claim 8, characterized in that, The connecting assembly includes an I-shaped bracket (18), the bottom crossbar of the I-shaped bracket (18) is disposed inside the tee pipe (14) and is rotatably connected to the tee pipe (14), the vertical bar of the I-shaped bracket (18) extends out of the top opening of the tee pipe (14), and the top crossbar of the I-shaped bracket (18) is located inside the wind baffle (15) and is fixed to the inner wall of the wind baffle (15).

10. A high-power engine high-temperature exhaust outlet device according to claim 9, characterized in that, The inner wall of the three-way pipe (14) is fixed with an annular limiting boss (19), and the annular limiting boss (19) is located outside the bottom crossbar of the I-shaped bracket (18).

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