An electromagnetically shielded high-temperature exhaust device

Abstract

The present application provides an electromagnetic shielding high-temperature exhaust device, including a mobile ejector, a front ejector, an electromagnetic shielding and isolation device, a rear ejector, and an exhaust pipe. The mobile ejector is movably arranged at the engine nozzle, and is used to collect and adjust the collection and ejection effect of the engine exhaust and discharge the exhaust into the front ejector; the front end of the front ejector is connected with the mobile ejector, and is used to eject the exhaust discharged by the mobile ejector, and the outer peripheral wall of the front ejector is provided with a cooling device and an external shielding device; the front end of the electromagnetic shielding and isolation device is connected with the rear end of the front ejector, and the rear end is connected with the front end of the rear ejector, and is used to realize electromagnetic shielding and isolation between the exhaust channel inside the front ejector and the external environment; the exhaust pipe is connected with the rear end of the rear ejector. The present application can realize electromagnetic shielding and isolation, and meet the needs of conducting electromagnetic compatibility tests of aircraft engines.

Description

Technical Field

[0001] The present application relates to the technical field of aircraft engine whole machine testing, and in particular, to an electromagnetic shielding high-temperature exhaust device. Background Art

[0002] When an aircraft engine is tested as a whole, the engine inhales a large amount of air through the air intake duct, which is pressurized in the compressor and then enters the combustion chamber to mix with the fuel for combustion, and then generates a large amount of high-temperature and high-speed exhaust gas that is discharged from the engine tail nozzle. The high-temperature exhaust device is used to collect all the high-temperature and high-speed exhaust gas generated during the whole-machine test of the aircraft engine, and finally discharges it to the external environment through the exhaust tower.

[0003] The high-temperature exhaust device usually consists of a mobile ejector and an exhaust pipe. The mobile ejector is installed near the rear end of the engine tail nozzle. The mobile ejector can adjust the axial distance between it and the engine tail nozzle section, thereby adjusting the collection and ejection effect of the high-temperature exhaust device on the engine exhaust. The exhaust pipe is nested and installed on the rear end of the mobile ejector. The other end is directly connected to the test bench exhaust tower, which can collect all the airflow discharged through the mobile ejector and discharge it into the test bench exhaust tower, and finally discharge all the exhaust to the external environment through the test bench exhaust tower.

[0004] The existing high-temperature exhaust device can meet the exhaust requirements of conventional whole-machine testing of aircraft engines. However, the existing high-temperature exhaust device contains a large-size exhaust channel directly connected to the external environment and has no corresponding electromagnetic shielding and isolation device. It does not have the functions of electromagnetic shielding and isolation and cannot meet the use requirements of aircraft engines for conducting whole-machine electromagnetic compatibility testing. Summary of the invention

[0005] The present application provides an electromagnetic shielding high-temperature exhaust device, which aims to solve the technical problem that the existing high-temperature exhaust device cannot meet the use requirements of aircraft engines for conducting whole-machine electromagnetic compatibility tests.

[0006] The technical solution adopted by the present invention is as follows:

[0007] An electromagnetic shielding high-temperature exhaust device comprises a movable ejector tube, a front ejector tube, an electromagnetic shielding and isolation device, a rear ejector tube, and an exhaust tube, wherein:

[0008] The movable ejector tube is movably arranged at the engine nozzle, and is used to collect and adjust the collection and ejection effect of the engine exhaust and discharge the exhaust into the front ejector tube;

[0009] The front end of the front ejector tube is sleeved with the mobile ejector tube and is used to eject the exhaust gas discharged from the mobile ejector tube. The outer peripheral wall of the front ejector tube is provided with a cooling device and an outer shielding device.

[0010] The front end of the electromagnetic shielding and isolation device is connected to the rear end of the front ejector tube, and the rear end is connected to the front end of the rear ejector tube, so as to realize electromagnetic shielding and isolation between the exhaust passage inside the front ejector tube and the external environment;

[0011] The exhaust pipe is sleeved with the rear end of the rear ejector pipe and is used to discharge the exhaust gas to the exhaust tower of the test bench and the external environment.

[0012] Furthermore, the electromagnetic shielding and isolation device is a cutoff waveguide tube, and both ends of the cutoff waveguide tube are connected to the front ejector tube and the rear ejector tube respectively through a first bolt and a third bolt.

[0013] Furthermore, the cooling device comprises:

[0014] A water spray ring is arranged on the inner wall of the front ejector tube. The water spray ring is connected with the high-pressure cooling water pipe. At the same time, an atomizing nozzle is arranged on the inner side of the water spray ring. The cooling water is atomized and sprayed into the front ejector tube through the high-pressure cooling water pipe and the atomizing nozzle of the water spray ring, and is directly mixed with the high-temperature and high-speed exhaust gas discharged from the engine to cool the high-temperature exhaust gas.

[0015] Furthermore, the cooling device further comprises:

[0016] The water-cooled wall is arranged on the outer wall of the front ejector tube. A cooling water supply pipe and a cooling water return pipe are respectively connected to both ends of the water-cooled wall. The cooling water circulates through the cooling water supply pipe, the water-cooled wall and the cooling water return pipe to cool the water-cooled wall and the shell of the front ejector tube.

[0017] Furthermore, the outer shielding device comprises:

[0018] A darkroom shielding plate, fixedly mounted on the outer shell of the front ejector tube;

[0019] The shielding shell is coaxially arranged on the outer side of the shell of the front ejector tube at a certain interval. The front end of the shielding shell is fixedly connected to the darkroom shielding plate by a second bolt, and the rear end is fixedly connected to the rear end of the front ejector tube and the front end of the electromagnetic shielding and isolation device by a first bolt.

[0020] Furthermore, it also includes a support frame, which is arranged below the front ejector tube, the electromagnetic shielding and isolation device, and the rear ejector tube to provide supporting force for the brackets respectively arranged on the outer walls of the front ejector tube and the rear ejector tube.

[0021] Furthermore, it also includes:

[0022] A water receiving tray is installed on the support frame and is used to collect spray cooling water leaking from the gap between the mounting contact surfaces of the front ejector tube and the rear ejector tube on both sides of the electromagnetic shielding and isolation device. The water receiving tray is also provided with a drain pipe.

[0023] Furthermore, a second slide rail is provided on the support frame, and a second pulley which reciprocates along the second slide rail is provided at the lower end of the bracket located on the outer wall of the rear ejector tube.

[0024] Furthermore, a first slide rail is arranged on the inner wall of the front end of the front ejector tube, and a first pulley which reciprocates along the first slide rail is arranged on the outer wall of the rear end of the movable ejector tube.

[0025] Furthermore, a third slide rail is arranged on the inner wall of the exhaust pipe, and a third pulley which reciprocates along the third slide rail is arranged on the rear end outer wall of the rear ejector pipe.

[0026] Compared with the prior art, this application has the following beneficial effects:

[0027] The present application provides an electromagnetic shielding high-temperature exhaust device, comprising a movable ejector tube, a front ejector tube, an electromagnetic shielding and isolation device, a rear ejector tube, and an exhaust tube, wherein: the movable ejector tube is movably arranged at the engine nozzle, and is used to collect and adjust the collection and ejection effect of the engine exhaust and discharge the exhaust into the front ejector tube; the front end of the front ejector tube is sleeved with the movable ejector tube, and is used to eject the exhaust discharged by the movable ejector tube, and the front ejector tube is provided with a cooling device and an external shielding device; the front end of the electromagnetic shielding and isolation device is connected to the rear end of the front ejector tube, and the rear end is connected to the front end of the rear ejector tube, and is used to achieve electromagnetic shielding and isolation between the exhaust channel inside the front ejector tube and the external environment; the exhaust tube is sleeved with the rear end of the rear ejector tube, and is used to discharge the exhaust into the exhaust tower of the test bench and the external environment. The present application installs electromagnetic shielding and isolation units at the end and outside of the ejector tube, which can achieve electromagnetic shielding and isolation between the exhaust channel inside the exhaust device and the external environment, so that the exhaust device meets the requirements of conducting whole-machine electromagnetic compatibility tests on aircraft engines; the front ejector tube is provided with a cooling device to cool the high-temperature exhaust gas discharged by the engine and the outer wall of the ejector tube, so as to prevent the high-temperature exhaust gas and heat from having adverse effects on the electromagnetic shielding and isolation device and the external shielding device structure.

[0028] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0030] Figure 1This is a schematic diagram of the overall structure of the electromagnetic shielding high-temperature exhaust device of the preferred embodiment of the present application.

[0031] In the figure: 1. movable ejector tube; 2. front ejector tube; 3. first pulley; 4. first slide rail; 5. water spray ring; 6. high-pressure cooling water pipe; 7. water-cooled wall; 8. cooling water supply pipe; 9. cooling water return pipe; 10. first bolt; 11. electromagnetic shielding and isolation device; 12. shielding shell; 13. darkroom shielding plate; 14. second bolt; 15. bracket; 16. support frame; 17. third bolt; 18. rear ejector tube; 19. exhaust pipe; 20. second pulley; 21. third pulley; 22. second slide rail; 23. third slide rail; 24. water receiving tray; 25. drain pipe. DETAILED DESCRIPTION

[0032] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0033] Reference Figure 1 The preferred embodiment of the present invention provides an electromagnetic shielding high-temperature exhaust device, comprising a movable ejector tube 1, a front ejector tube 2, an electromagnetic shielding and isolation device 11, a rear ejector tube 18, and an exhaust tube 19, wherein:

[0034] The movable ejector tube 1 is movably arranged at the engine nozzle, and is used to collect and adjust the collection and ejection effect of the engine exhaust and discharge the exhaust into the front ejector tube 2;

[0035] The front end of the front ejector tube 2 is connected with the mobile ejector tube 1 and is used to eject the exhaust gas discharged from the mobile ejector tube 1. The outer peripheral wall of the front ejector tube 2 is provided with a cooling device and an external shielding device.

[0036] The front end of the electromagnetic shielding and isolation device 11 is connected to the rear end of the front ejector tube 2, and the rear end is connected to the front end of the rear ejector tube 18, so as to realize electromagnetic shielding and isolation between the exhaust passage inside the front ejector tube 2 and the external environment;

[0037] The exhaust pipe 19 is connected with the rear end of the rear ejector pipe 18 to discharge the exhaust gas to the exhaust tower of the test bench and the external environment.

[0038] The present embodiment provides an electromagnetic shielding high-temperature exhaust device, comprising a mobile ejector tube 1, a front ejector tube 2, an electromagnetic shielding and isolation device 11, a rear ejector tube 18, and an exhaust tube 19, wherein: the mobile ejector tube 1 is movably arranged at the engine nozzle, and is used to collect and adjust the collection and ejection effect of the engine exhaust and discharge the exhaust into the front ejector tube 2; the front end of the front ejector tube 2 is sleeved with the mobile ejector tube 1, and is used to eject the exhaust gas discharged by the mobile ejector tube 1, and the front ejector tube 2 is provided with a cooling device and an external shielding device; the front end of the electromagnetic shielding and isolation device 11 is connected to the rear end of the front ejector tube 2, and the rear end is connected to the front end of the rear ejector tube 18, and is used to achieve electromagnetic shielding and isolation between the exhaust channel inside the front ejector tube 2 and the external environment; the exhaust tube 19 is sleeved with the rear end of the rear ejector tube 18, and is used to discharge the exhaust gas to the exhaust tower of the test bench and the external environment. In this embodiment, an electromagnetic shielding and isolation device 11 and an external shielding device are installed at the end and outside of the front ejector tube 2, which can achieve electromagnetic shielding and isolation between the exhaust channel inside the exhaust device and the external environment, so that the exhaust device meets the needs of conducting electromagnetic compatibility tests of the entire aircraft engine; at the same time, due to the high exhaust temperature of the engine, if no treatment is performed, it will directly lead to the electromagnetic shielding and isolation device 11 and the external shielding device being unable to perform their functions due to the high temperature. Therefore, in this embodiment, a cooling device is provided in the front ejector tube 2 to cool down the high-temperature exhaust gas discharged by the engine and the outer wall of the ejector tube, so as to prevent the high-temperature exhaust gas and heat from having an adverse effect on the structure of the electromagnetic shielding and isolation device 11 and the external shielding device, thereby ensuring that the electromagnetic shielding and isolation functions can be achieved, and ensuring the stability, reliability and durability of the electromagnetic shielding and isolation functions.

[0039] In a preferred embodiment of the present application, the electromagnetic shielding and isolation device 11 is a cutoff waveguide tube, and both ends of the cutoff waveguide tube are connected to the front ejector tube 2 and the rear ejector tube 18 respectively through a first bolt 10 and a third bolt 17 .

[0040] This embodiment uses a cutoff waveguide as an electromagnetic shielding and isolation device 11. According to the waveguide theory, the cutoff waveguide has a cutoff frequency, namely, a cutoff waveguide. When the signal frequency is higher than the cutoff frequency, the cutoff waveguide is conductive, and the electromagnetic wave is cut off or attenuated and cannot be transmitted, which is similar to the frequency characteristics of a high-pass filter. Using this principle, a cutoff waveguide relative to a certain frequency can be designed so that the frequency of the interference signal falls within the cutoff region of the waveguide, so that the interference signal cannot pass through the waveguide. In other words, the waveguide has the effect of electromagnetic shielding, and the waveguide working in the cutoff region becomes a cutoff waveguide. This embodiment uses the characteristics of the cutoff waveguide to achieve axial electromagnetic shielding and isolation between the exhaust channel inside the exhaust device and the external environment, so that the exhaust device meets the requirements of the aircraft engine to carry out electromagnetic compatibility testing of the whole machine.

[0041] In a preferred embodiment of the present application, the outer shielding device comprises:

[0042] A darkroom shielding plate 13 is fixedly mounted on the outer shell of the front ejector tube 2;

[0043] The shielding shell 12 is coaxially arranged on the outer side of the shell of the front ejection tube 2 at a certain interval. The front end of the shielding shell 12 is fixedly connected to the darkroom shielding plate 13 by a second bolt 14, and the rear end is fixedly connected to the rear end of the front ejection tube 2 and the front end of the electromagnetic shielding and isolation device 11 by a first bolt 10.

[0044] In this embodiment, the external shielding device includes a darkroom shielding plate 13 and a shielding shell 12. By arranging the darkroom shielding plate 13 and the shielding shell 12 in coordination with each other, radial electromagnetic shielding and isolation can be further achieved between the exhaust channel inside the exhaust device and the external environment, so that the exhaust device meets the requirements of conducting electromagnetic compatibility tests of the entire aircraft engine.

[0045] In a preferred embodiment of the present application, the cooling device comprises:

[0046] A water spray ring 5 is arranged on the inner wall of the front ejector tube 2. The water spray ring 5 is connected to the high-pressure cooling water pipe 6. At the same time, an atomizing nozzle is arranged on the inner side of the water spray ring 5. The cooling water is atomized and sprayed into the front ejector tube 2 through the high-pressure cooling water pipe 6 and the atomizing nozzle of the water spray ring 5, and is directly mixed with the high-temperature and high-speed exhaust gas discharged from the engine to cool the high-temperature exhaust gas.

[0047] In the present embodiment, the high-temperature and high-speed exhaust gas generated by the engine is collected by the mobile ejector tube 1 and is discharged into the front ejector tube 2 with a certain ejection effect. The high-temperature and high-speed exhaust gas entering the front ejector tube 2 is mixed and cooled by the atomized cooling water sprayed by the water spray ring 5 so that it reaches the temperature that the cutoff waveguide tube can withstand, thereby achieving the effect of directly cooling the high-temperature exhaust gas, preventing the high-temperature exhaust gas discharged by the engine from being directly discharged into the cutoff waveguide tube and damaging it, and ensuring that the cutoff waveguide tube can realize the electromagnetic shielding function. The cooled exhaust gas is then discharged into the exhaust pipe 19 through the cutoff waveguide tube and the rear ejector tube 18, and finally discharged into the exhaust tower of the test bench and the external environment through the exhaust pipe 19.

[0048] In a preferred embodiment of the present application, the cooling device further comprises:

[0049] The water-cooled wall 7 is arranged on the outer wall of the front ejector tube 2. The two ends of the water-cooled wall 7 are respectively connected with a cooling water supply pipe 8 and a cooling water return pipe 9. The cooling water circulates through the cooling water supply pipe 8, the water-cooled wall 7 and the cooling water return pipe 9 to cool the water-cooled wall 7 and the shell of the front ejector tube 2.

[0050] In this embodiment, since the cutoff waveguide and the shielding shell 12 are not resistant to high temperatures, although in the aforementioned embodiment, the water spray ring 5 is sprayed into the front ejector tube 2 by the atomizing nozzle, and the high-temperature high-speed exhaust gas discharged by the engine is directly mixed to cool the high-temperature exhaust gas, but since the front ejector tube 2 itself is also a heat conductor, part of the heat will be directly conducted to the cutoff waveguide and the shielding shell 12 through the front ejector tube 2 during the test. For this reason, in this embodiment, a water-cooled wall 7 is arranged on the outer wall of the middle section of the front ejector tube 2, and the two ends of the water-cooled wall 7 are respectively connected with a cooling water supply pipe 8 and Cooling water return pipe 9, cooling water circulates through cooling water supply pipe 8, water-cooled wall 7 and cooling water return pipe 9 and water-cools water-cooled wall 7 and the middle shell of front ejector tube 2 to prevent high temperature of the front shell of front ejector tube 2 from being directly transmitted to the rear shell of front ejector tube 2 and affecting the cutoff waveguide tube and shielding shell 12. It can be seen that in the middle section of front ejector tube 2, water spray ring 5 and water-cooled wall 7 are used to cool the exhaust gas in front ejector tube 2 and the outer shell of front ejector tube 2 at the same time, ensuring that high temperature will not be transmitted to the cutoff waveguide tube and shielding shell 12 in all directions, and the cooling effect is better, more comprehensive and more reliable.

[0051] In a preferred embodiment of the present application, the electromagnetic shielding high-temperature exhaust device also includes a support frame 16, which is arranged below the front ejector tube 2, the electromagnetic shielding and isolation device 11, and the rear ejector tube 18, to provide support force for the brackets 15 respectively arranged on the outer walls of the front ejector tube 2 and the rear ejector tube 18, thereby ensuring the temperature resistance and safety of the device operation.

[0052] In a preferred embodiment of the present application, the electromagnetic shielding high-temperature exhaust device also includes a water receiving tray 24, which is installed on the support frame 16 and is used to collect spray cooling water leaked from the gap between the contact surfaces of the front ejector 2 and the rear ejector 18 on both sides of the electromagnetic shielding and isolation device 11. The water receiving tray 24 is also provided with a drain pipe 25 for easy drainage.

[0053] In the present embodiment, since the atomized water is sprayed into the front ejector tube 2 through the atomizing nozzle of the water spray ring 5, and the high-temperature high-speed exhaust gas is directly mixed with the high-temperature and high-speed exhaust gas discharged by the engine to cool the high-temperature exhaust gas, during the test, a certain amount of cooling water will inevitably continue to accumulate in the exhaust device. In order to facilitate drainage, in the present embodiment, a gap is set between the cooling water from both sides of the electromagnetic shielding and isolation device 11 and the mounting contact surface of the front ejector tube 2 and the rear ejector tube 18. The cooling water leaks out from the gap and finally falls into the water receiving tray 24 arranged below and is collected, so as to avoid the cooling water flowing everywhere and affecting the safe operation of the test. When a certain amount is collected, it can be discharged to the wastewater collection point through the drain pipe 25, or used for other purposes, or injected into the water spray ring 5 and the water-cooled wall 7 as cooling water again after treatment.

[0054] In a preferred embodiment of the present application, a second slide rail 22 is provided on the support frame 16, and a second pulley 20 that reciprocates along the second slide rail 22 is provided at the lower end of the bracket 15 located on the outer wall of the rear ejector tube 18; a third slide rail 23 is provided on the inner wall of the exhaust tube 19, and a third pulley 21 that reciprocates along the third slide rail 23 is provided on the rear end outer wall of the rear ejector tube 18.

[0055] In this embodiment, a second slide rail 22 and a third pulley 21 are respectively provided at the front and rear ends of the rear ejector tube 18. When the bolt 17 is removed, the rear ejector tube 18 can be easily pushed to move left and right, so that the rear ejector tube 18 is conveniently installed, disassembled and adjusted.

[0056] In a preferred embodiment of the present application, a first slide rail 4 is provided on the front inner wall of the front ejection tube 2 , and a first pulley 3 that reciprocates along the first slide rail 4 is provided on the rear outer wall of the movable ejection tube 1 .

[0057] During the test, the mobile ejector tube 1 needs to be moved to adjust the collection and ejection effect of the exhaust device on the engine exhaust, and in order to reduce the movement resistance, the present embodiment sets a first pulley 3 under the outer wall at the rear end of the mobile ejector tube 1. At the same time, a first slide rail 4 is correspondingly set on the inner wall under the front end of the front ejector tube 2. The first pulley 3 can slide along the first slide rail 4, and the mobile ejector tube 1 can be pushed to move it left and right, so as to adjust the collection and ejection effect of the exhaust device on the engine exhaust, and it is convenient to install, disassemble and adjust the mobile ejector tube 1.

[0058] The electromagnetic shielding high-temperature exhaust device of the present invention has been processed, installed and debugged and is currently in use. Its cutoff waveguide tube is convenient for loading and unloading and maintenance. The exhaust device's functions of collecting engine exhaust and producing an ejection effect, cooling the engine exhaust and the outer wall of the ejector tube, and the exhaust device's electromagnetic shielding and isolation functions can all meet the design and use requirements.

[0059] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An electromagnetic shielding high temperature exhaust device, characterized in that: It comprises a movable ejector tube (1), a front ejector tube (2), an electromagnetic shielding and isolation device (11), a rear ejector tube (18), and an exhaust tube (19), wherein: The movable ejector tube (1) is movably arranged at the engine nozzle, and is used to collect and adjust the collection and ejection effect of the engine exhaust and discharge the exhaust into the front ejector tube (2); The front end of the front ejector tube (2) is sleeved with the mobile ejector tube (1) and is used to eject the exhaust gas discharged from the mobile ejector tube (1); the outer peripheral wall of the front ejector tube (2) is provided with a cooling device and an outer shielding device; The front end of the electromagnetic shielding and isolation device (11) is connected to the rear end of the front ejector tube (2), and the rear end is connected to the front end of the rear ejector tube (18), so as to realize electromagnetic shielding and isolation between the exhaust passage inside the front ejector tube (2) and the external environment; The exhaust pipe (19) is sleeved with the rear end of the rear ejector pipe (18) and is used to discharge the exhaust gas to the exhaust tower of the test bench and the external environment; The cooling device further comprises: a water-cooled wall (7) arranged on the outer wall of the front ejector tube (2), and the two ends of the water-cooled wall (7) are respectively connected with a cooling water supply pipe (8) and a cooling water return pipe (9), and the cooling water circulates through the cooling water supply pipe (8), the water-cooled wall (7) and the cooling water return pipe (9) to cool the water-cooled wall (7) and the shell of the front ejector tube (2); The external shielding device comprises: a darkroom shielding plate (13) fixedly mounted on the outer shell of the front ejector tube (2); a shielding shell (12) coaxially arranged at a certain interval on the outer shell of the front ejector tube (2); the front end of the shielding shell (12) is fixedly connected to the darkroom shielding plate (13) via a second bolt (14), and the rear end is fixedly connected to the rear end of the front ejector tube (2) and the front end of the electromagnetic shielding and isolation device (11) via a first bolt (10).

2. The electromagnetic shielding high temperature exhaust device according to claim 1, characterized in that: The electromagnetic shielding and isolation device (11) is a cutoff waveguide tube, and the two ends of the cutoff waveguide tube are respectively connected to the front ejector tube (2) and the rear ejector tube (18) through a first bolt (10) and a third bolt (17).

3. The electromagnetic shielding high temperature exhaust device according to claim 1, characterized in that: The cooling device comprises: A water spray ring (5) is arranged on the inner wall of the front ejector tube (2). The water spray ring (5) is connected to the high-pressure cooling water pipe (6). At the same time, an atomizing nozzle is arranged on the inner side of the water spray ring (5). Cooling water is atomized and sprayed into the front ejector tube (2) through the high-pressure cooling water pipe (6) and the atomizing nozzle of the water spray ring (5). The cooling water is directly mixed with the high-temperature and high-speed exhaust gas discharged by the engine to cool the high-temperature exhaust gas.

4. The electromagnetic shielding high temperature exhaust device according to claim 1, characterized in that: It also includes a support frame (16), which is arranged below the front ejector tube (2), the electromagnetic shielding and isolation device (11), and the rear ejector tube (18) to provide support force for the brackets (15) respectively arranged on the outer walls of the front ejector tube (2) and the rear ejector tube (18).

5. The electromagnetic shielding high temperature exhaust device according to claim 4, characterized in that: Also includes: A water receiving tray (24) is installed on the support frame (16) and is used to collect spray cooling water leaking from the gap between the mounting contact surfaces of the front ejector tube (2) and the rear ejector tube (18) on both sides of the electromagnetic shielding and isolation device (11). The water receiving tray (24) is also provided with a drainage pipe (25).

6. The electromagnetic shielding high temperature exhaust device according to claim 5, characterized in that: The support frame (16) is provided with a second slide rail (22), and the lower end of the bracket (15) located on the outer wall of the rear ejector tube (18) is provided with a second pulley (20) that reciprocates along the second slide rail (22).

7. The electromagnetic shielding high temperature exhaust device according to claim 1, characterized in that: A first slide rail (4) is arranged on the front inner wall of the front ejection cylinder (2), and a first pulley (3) which reciprocates along the first slide rail (4) is arranged on the rear outer wall of the movable ejection cylinder (1).

8. The electromagnetic shielding high temperature exhaust device according to claim 1, characterized in that: A third slide rail (23) is arranged on the inner wall of the exhaust pipe (19), and a third pulley (21) which reciprocates along the third slide rail (23) is arranged on the rear end outer wall of the rear ejector pipe (18).

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