Generator tail gas infrared characteristic suppression device

Abstract

The invention relates to a generator tail gas infrared characteristic suppression device, and relates to the technical field of infrared characteristic suppression, the generator tail gas infrared characteristic suppression device comprises an inner cylinder, a middle cylinder and an outer cylinder which are coaxially arranged, the inner cylinder is sleeved with the middle cylinder, the inner cylinder is sleeved with the outer cylinder, the upper end of the inner cylinder is arranged outside the middle cylinder, and the lower end of the inner cylinder is arranged outside the outer cylinder. An annular upper cover plate is fixedly connected between the outer side wall of the inner cylinder and the inner side wall of the outer cylinder, the annular upper cover plate blocks a gap between the inner cylinder and the outer cylinder, the middle cylinder is fixedly connected with the outer cylinder, a circular lower cover plate is fixedly connected to the inner wall of the bottom end of the middle cylinder, and the circular lower cover plate is fixedly connected to the inner wall of the bottom end of the middle cylinder. The bottom end of the inner cylinder is arranged above the circular lower cover plate, and the upper end of the outer cylinder is fixedly connected with a cap. The device has the effect of obviously reducing the infrared characteristic generated by the tail gas of the diesel generator.

Description

Technical Field

[0001] The present application relates to the technical field of suppressing infrared characteristics, and in particular to a device for suppressing infrared characteristics of generator exhaust. Background Art

[0002] Diesel generator exhaust is a high-temperature gas. Suppressing and reducing the infrared radiation characteristics of diesel generator exhaust emissions to avoid being detected and tracked by the enemy has become an important aspect of today's national defense system construction.

[0003] The principle of infrared suppression is generally to reduce the infrared signature of diesel generator exhaust by lowering its exhaust temperature. Traditional cooling systems use water spray or condensation heat exchange to reduce exhaust temperature, which requires large amounts of cooling water and has low system reliability. Furthermore, both the water mist generated by water spray heat exchange and the cooling system using condensation systems expose a large amount of heat, resulting in poor suppression of the infrared signature of diesel generator exhaust. Summary of the Invention

[0004] In order to reduce the infrared characteristics generated by diesel generator exhaust, the present application provides a generator exhaust infrared characteristic suppression device.

[0005] The present application provides a generator exhaust infrared characteristic suppression device that adopts the following technical solution: A generator exhaust infrared signature suppression device comprises a coaxially arranged inner cylinder, a middle cylinder and an outer cylinder, wherein the middle cylinder is sleeved on the outside of the inner cylinder, the outer cylinder is sleeved on the outside of the inner cylinder, the upper end of the inner cylinder is placed outside the middle cylinder, an annular upper cover plate is fixedly connected between the outer wall of the inner cylinder and the inner wall of the outer cylinder, the annular upper cover plate blocks the gap between the inner cylinder and the outer cylinder, the middle cylinder is fixedly connected to the outer cylinder, a circular lower cover plate is fixedly connected to the inner wall of the bottom end of the middle cylinder, the bottom end of the inner cylinder is placed above the circular lower cover plate, and a cap is fixedly connected to the upper end of the outer cylinder; The outer wall of the inner cylinder, the inner wall of the middle cylinder, the annular upper cover plate and the circular lower cover plate together enclose an annular swirl mixing chamber; The cap, the circular lower cover plate, the outer wall of the middle tube and the inner wall of the outer tube together enclose an annular air film cooling chamber; Two swirl air inlet channels which are arranged obliquely and are symmetrical along the axis are fixed on the upper part of the outer cylinder, and an exhaust pipe is fixed on the outer cylinder, and the two swirl air inlet channels and the exhaust pipe are both connected to the annular swirl mixing chamber; two cooling air inlet channels which are arranged obliquely and are symmetrical along the axis are fixed on the lower part of the outer cylinder, and the two cooling air inlet channels are both connected to the annular air film cooling chamber, and an air supply device for supplying air to the annular swirl mixing chamber or the annular air film cooling chamber is provided in the swirl air inlet channel and the cooling air inlet channel.

[0006] By adopting the above technical solution, when working, the exhaust gas generated by the diesel generator enters the annular vortex mixing chamber through the exhaust pipe, and then the air supply device is started. The air supply device allows cold air to enter the annular vortex mixing chamber through two vortex air inlet channels to form a cold vortex airflow. Then the diesel generator exhaust gas and the cold vortex airflow are mixed and swirled downward, and at the same time, the precipitated water mist is swirled onto the inner wall of the middle cylinder. When the mixed gas swirls to the bottom of the middle cylinder, it can enter the interior of the inner cylinder, and then pass through the inner cylinder from bottom to top and finally be discharged through the cap.

[0007] At the same time, while the exhaust gas of the diesel generator and the cold cyclone airflow are mixed and rotated, the cold air enters the annular air film cooling chamber through two cooling air inlet channels to form a cold cyclone airflow. The cold cyclone airflow swirls upward while conducting heat transfer with the outer wall of the middle cylinder. In the process of the cold cyclone airflow swirling upward, a layer of cold air film is formed between the middle cylinder and the outer cylinder, which prevents most of the heat on the outside of the middle cylinder from being transferred through heat conduction, so that the temperature of the outer cylinder is always close to the background ambient temperature. Then the cold cyclone airflow can be discharged through the cap, thereby greatly reducing the generation of large-area infrared radiation on the outer wall of the middle cylinder and further reducing the infrared characteristics.

[0008] At the same time, the exhaust gas of the diesel generator is mixed with cold air and cooled and water mist is precipitated, becoming dry air with lower temperature, which greatly reduces the generation of infrared radiation at the cap and significantly reduces the infrared characteristics generated by the exhaust gas of the diesel generator.

[0009] Optionally, the air supply device is configured as a blower.

[0010] By adopting the above technical solution, cold air can be quickly delivered to the annular air film cooling chamber and the annular vortex mixing chamber through the blower, and the flow rate of the cold air can be accelerated to form a cold vortex airflow.

[0011] Optionally, a support tube is provided on the outer tube, one end of the support tube is placed outside the outer tube, and the other end of the support tube passes through the side wall of the outer tube and the side wall of the middle tube and is placed in the middle tube, a cooling tube is fixed in the support tube, one end of the cooling tube is placed outside the outer tube, and the other end of the cooling tube is placed in the middle tube, the exhaust pipe is passed through the cooling tube, the exhaust pipe is coaxially arranged and fixedly connected to the cooling tube, an annular cover is fixed between the end of the cooling tube placed outside the outer tube and the outer side wall of the exhaust pipe, and the cooling tube is fixed on the arc-shaped side wall of the end outside the outer tube and is connected to the cooling intake pipe.

[0012] By adopting the above technical solution, in the process of the diesel generator exhaust gas entering the annular vortex mixing chamber through the exhaust pipe, cold air can be transported to the cooling pipe through the cooling air inlet pipe, and the outer wall of the exhaust pipe is cooled by heat conduction, thereby reducing its infrared characteristics. The cold air and the diesel generator exhaust gas enter the annular vortex mixing chamber, participate in mixing and rotation, and mix with the exhaust gas of the diesel generator.

[0013] Optionally, a drain pipe is passed through and fixedly connected to the center of the circular lower cover plate, and the edge level of the circular lower cover plate is higher than the center level, and a valve is installed on the drain pipe.

[0014] By adopting the above technical solution, the water droplets naturally flowing down the inner wall of the middle tube can be concentrated through the circular lower cover plate. The concentrated water droplets can then be discharged from the drain pipe, reducing the water content of the generator exhaust, reducing the generation of white smoke, and further reducing the generation of infrared characteristics.

[0015] Optionally, the bottom ends of the outer tube and the middle tube are fixed with the same base bracket, and the base bracket includes a support plate, and the four corner ends of the support plate are fixed with vertically arranged support rods, and a reinforcing rod is fixed between two adjacent support rods, and a gasket is fixed to the bottom end of each support rod.

[0016] By adopting the above technical solution, the base bracket is used to support the outer tube and the middle tube, thereby improving the structural strength. At the same time, the height of the support rod can be changed according to the actual use site, and the height of the base bracket can be adjusted to thereby adjust the position of the outer tube.

[0017] Optionally, a triangular shell is provided at the position of the swirl air inlet channel and the position of the cooling air inlet channel. The triangular shell is fixedly connected to the outer cylinder, and a rectangular air inlet corresponding to the swirl air inlet channel or the cooling air inlet channel is opened on the triangular shell.

[0018] By adopting the above technical solution, the triangular shell can support the swirl air intake channel and the cooling air intake channel, thereby enhancing the structural strength.

[0019] Optionally, one or more pairs of symmetrically arranged hanging rings are fixed to the edge side of the cap, and each pair of the hanging rings are symmetrically distributed along the center of the cap.

[0020] By adopting the above technical solution, the structural design of the hanging ring facilitates the transportation and movement of the device, and facilitates the installation and transportation of the device by hand or by lifting.

[0021] Optionally, reinforcement rings are fixedly connected to the outer side walls of the outer tube and the middle tube.

[0022] By adopting the above technical solution, the structural design of the reinforcement ring enhances the structural strength of the outer tube and the middle tube.

[0023] In summary, this application includes at least one of the following beneficial technical effects: 1. After the exhaust gas of the diesel generator is mixed with cold air and cooled and water mist is precipitated, it becomes dry air with lower temperature, which greatly reduces the generation of infrared radiation at the cap and significantly reduces the infrared characteristics generated by the exhaust gas of the diesel generator; 2. As the cold vortex airflow swirls upward, it conducts heat to the outer wall of the middle tube. During this upward vortex, a cold air film is formed between the middle and outer tubes, preventing most of the heat on the outer side of the middle tube from being transferred through heat conduction. This significantly reduces the generation of large-area infrared radiation from the outer wall of the middle tube, further reducing the infrared signature. 3. Cold air can be transported to the cooling pipe through the cooling air intake pipe, and the outer wall of the exhaust pipe is cooled by heat conduction, thereby reducing its infrared characteristics. The cold air and the exhaust gas of the diesel generator enter the annular swirl mixing chamber, participate in mixing and rotation, and mix with the exhaust gas of the diesel generator. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application; Figure 2 This is a schematic structural diagram of the inner cylinder of an embodiment of the present application; Figure 3 Schematic diagram of the structure of the exhaust pipe of an embodiment of the present application.

[0025] In the figure, 1. inner tube; 2. middle tube; 3. outer tube; 4. annular upper cover; 5. circular lower cover; 6. cap; 7. annular swirl mixing chamber; 8. annular air film cooling chamber; 9. swirl air inlet channel; 10. cooling air inlet channel; 11. air supply device; 12. base bracket; 121. support plate; 122. reinforcement rod; 123. gasket; 124. support rod; 13. triangular shell; 131. rectangular air inlet; 14. hanging ring; 15. reinforcement ring; 16. support pipe; 17. cooling pipe; 18. exhaust pipe; 19. annular cover; 20. cooling air inlet pipe; 21. drain pipe; 22. valve; 23. connecting rod; 24. annular lower cover; 25. exhaust cooling chamber. DETAILED DESCRIPTION

[0026] The following is combined with Figure 1 -Attached Figure 3 , further details of this application are given.

[0027] The embodiment of the present application is: a generator exhaust infrared characteristic suppression device, referring to Figure 1 and Figure 2 The invention comprises an inner tube 1 and a middle tube 2 sleeved on the outside of the inner tube 1. The inner tube 1 has openings at both the upper and lower ends, and the inner tube 1 and the middle tube 2 are coaxially arranged. The top end of the inner tube 1 extends beyond the top end of the middle tube 2. An annular upper cover plate 4 is fixedly connected between the top end of the inner side wall of the middle tube 2 and the upper portion of the outer side wall of the inner tube 1, sealing the gap between the inner tube 1 and the outer tube 3.

[0028] A circular lower cover plate 5 is fixedly connected to the lower portion of the inner sidewall of the middle tube 2. This completely blocks the lower end of the middle tube 2. The bottom end of the inner tube 1 is located above the circular lower cover plate 5. A plurality of connecting rods 23 are fixedly connected to the bottom end of the curved outer sidewall of the inner tube 1. These connecting rods 23 are equidistantly arranged around the axis of the inner tube 1. The ends of the connecting rods 23 facing away from the inner tube 1 are fixedly connected to the inner sidewall of the middle tube 2. The inner tube 1 is fixedly connected to the middle tube 2 via these multiple connecting rods 23.

[0029] The outer wall of the inner cylinder 1 , the inner wall of the middle cylinder 2 , the annular upper cover plate 4 and the circular lower cover plate 5 together enclose an annular swirl mixing chamber 7 .

[0030] The outer wall of the middle cylinder 2 is sheathed with an outer cylinder 3, coaxially arranged with the middle cylinder 2. A connecting rod 23, identical to the connecting rod 23 between the inner and middle cylinders 1 and 2, is fixedly connected between the top end of the inner wall of the outer cylinder 3 and the annular upper cover plate 4. An annular lower cover plate 24 is fixedly connected between the bottom end of the inner wall of the outer cylinder 3 and the outer wall of the middle cylinder 2, sealing the gap between the outer and middle cylinders 3 and 2. A cap 6 is fixedly connected to the top end of the outer cylinder 3, which tapers to an open position at the end away from the outer cylinder 3.

[0031] The cap 6 , the annular lower cover plate 24 , the outer side wall of the middle tube 2 and the inner side wall of the outer tube 3 together enclose an annular air film cooling chamber 8 .

[0032] A triangular shell 13 is fixed to the upper portion of the outer cylinder 3. Four triangular shells 13 are provided, each with a rectangular air inlet 131. Two swirl air inlet channels 9 are provided on the outer cylinder 3, arranged obliquely and symmetrically along the axis. These inlet channels correspond one-to-one with and communicate with the rectangular air inlet 131. These two swirl air inlet channels 9 are connected to the annular swirl mixing chamber 7. Two cooling air inlet channels 10 are fixedly connected to the lower portion of the outer cylinder 3, arranged obliquely and symmetrically along the axis. These cooling air inlet channels 10 correspond one-to-one with and communicate with the rectangular air inlet 131. Both cooling air inlet channels 10 are connected to the annular air film cooling chamber 8.

[0033] Reference Figure 1 、 Figure 2 and Figure 3 An exhaust pipe 18 is provided between the two swirl inlet channels 9 for introducing generator exhaust gas into the annular swirl mixing chamber 7. An air supply device 11 is installed within each of the two swirl inlet channels 9 and the two cooling air inlet channels 10 for blowing cool air into the annular swirl mixing chamber 7 or the annular air film cooling chamber 8. In this embodiment, the air supply device 11 is configured as a blower mounted at the rectangular air inlet 131 on the triangular housing 13.

[0034] Generator exhaust enters the annular swirl mixing chamber 7 through exhaust pipe 18. The blower is then activated to introduce cool air into two obliquely arranged swirl inlet channels 9. This cool air then forms a cold swirl flow within the annular swirl mixing chamber 7, rotating around the outside of the inner cylinder 1. During this rotation, the generator exhaust and the cold swirl flow mix thoroughly, exchanging heat and reducing the temperature of the generator exhaust. Simultaneously, the water mist produced by the mixing of the generator exhaust and the cold swirl flow rotates outward onto the inner wall of the middle cylinder 2 under the centrifugal force of the cold swirl flow, forming water droplets that naturally flow down the inner wall of the middle cylinder 2.

[0035] To facilitate the timely discharge of water droplets generated during this process, a drain pipe 21 is installed and secured to the center of the circular lower cover 5. The edge of the circular lower cover 5 is elevated above the center. A valve 22 is installed on drain pipe 21, located beneath the circular lower cover 5. Water droplets can be discharged from drain pipe 21, and regular drainage can be achieved by turning valve 22 on and off. This reduces the moisture content of the generator exhaust, minimizes white smoke, and further minimizes infrared signatures.

[0036] A blower can be used to introduce cold air into the two obliquely arranged cooling air inlet channels 10. The cold air can form a cold vortex airflow rotating around the middle tube 2 in the annular air film cooling chamber 8, isolating the heat radiation and exchange between the outer wall of the middle tube 2 and the outer tube 3, making it difficult for the temperature inside the middle tube 2 to be transferred to the outer tube 3 through heat exchange.

[0037] A support tube 16 is installed on the outer tube 3, with its axis perpendicular to the axis of the outer tube 3. One end of the support tube 16 is located outside the outer tube 3, while the other end passes through the sidewall of the outer tube 3 and the sidewall of the middle tube 2 and is located inside the middle tube 2. A cooling tube 17 is fixedly connected to the support tube 16, coaxially arranged with the support tube 16 and sleeved outside the support tube 16. One end of the cooling tube 17 is located outside the outer tube 3, while the other end is located inside the middle tube 2. An exhaust pipe 18 is installed inside the cooling pipe 17, coaxially arranged with the exhaust pipe 18. An annular cover 19 is fixed between the end of the cooling pipe 17 located outside the outer tube 3 and the outer wall of the exhaust pipe 18 to block the gap between them. The end of the cooling pipe 17 located outside the outer tube 3 is fixedly connected to the curved sidewall and connected to a cooling air intake pipe 20, whose axis is parallel to the axis of the inner tube 1.

[0038] The outer wall of the exhaust pipe 18, the inner wall of the cooling tube 17, and the annular cover 19 form an exhaust cooling chamber 25. When the cold air drawn in by the cooling intake pipe 20 enters the exhaust cooling chamber 25, a cold air film forms between the inner wall of the cooling tube 17 and the outer wall of the exhaust pipe 18. This prevents the temperature of the exhaust pipe 18 from reaching the outer wall of the cooling tube 17 through heat transfer, thereby suppressing the infrared signature at the air inlet of the device. Simultaneously, the exhaust cooling chamber 25 communicates with the annular swirl mixing chamber 7. This cold air film continues to mix within the annular swirl mixing chamber 7, assisting in the cooling process and accelerating the flow rate of the cold air, thus forming a cold swirl flow.

[0039] Reference Figure 1 and Figure 2 The lower end of the outer tube 3 is provided with a base bracket 12, which includes a support plate 121. The bottom ends of the outer tube 3 and the middle tube 2 are fixedly connected to the support plate 121. Vertical support rods 124 are fixed to the ends of the four corners of the support plate 121. Reinforcement rods 122 are fixedly connected between two adjacent support rods 124. A gasket 123 is fixed to the bottom end of each support rod 124.

[0040] In order to facilitate the transportation and movement of the device, one or more pairs of symmetrically arranged hanging rings 14 are fixedly connected to the edge side of the cap 6, and each pair of hanging rings 14 is symmetrically distributed along the center of the cap 6.

[0041] In order to improve the structural strength of the device, reinforcement rings 15 are fixedly connected to the outer wall of the outer tube 3 and the outer wall of the middle tube 2. The reinforcement rings 15 are respectively located at the position of the upper part of the outer tube 3 corresponding to the connecting rod 23, the position of the middle tube 2 corresponding to the connecting rod 23, the position of the middle tube 2 corresponding to the circular lower cover plate 5, and the position of the middle tube 2 corresponding to the annular lower cover plate 24.

[0042] The implementation principle of the embodiment of the present application is: when working, the exhaust gas of the diesel generator will enter the annular vortex mixing chamber 7 through the exhaust pipe 18, and at the same time, the blower is started to allow cold air to enter the annular vortex mixing chamber 7 through the two vortex air inlet channels 9 to form a cold vortex airflow. The exhaust gas of the diesel generator and the cold vortex airflow are mixed and swirled downward, and the precipitated water mist is swirled onto the inner wall of the middle cylinder 2.

[0043] After the mixed gas swirls to the bottom of the middle tube 2, it can enter the interior of the inner tube 1, and then pass through the inner tube 1 from bottom to top and be discharged through the cap 6. The water mist is discharged through the drain pipe 21. At this time, the exhaust gas of the diesel generator is mixed with the cold air and cooled and the water mist is precipitated, becoming dry air with a lower temperature, which greatly reduces the generation of infrared radiation at the cap 6.

[0044] At the same time, in the process of the diesel generator exhaust gas entering the annular vortex mixing chamber 7 through the exhaust pipe 18, cold air is introduced into the cooling pipe 17 through the cooling air inlet pipe 20, and the outer wall of the exhaust pipe 18 is cooled by heat conduction. Then the cold air and the diesel generator exhaust gas enter the annular vortex mixing chamber 7 to participate in mixing and rotation.

[0045] Simultaneously, as the diesel generator exhaust mixes and swirls with the cold vortex airflow, the cold air enters the annular air film cooling chamber 8 through two cooling air inlet passages 10, forming a cold vortex airflow. As the cold vortex airflow swirls upward, it conducts heat to the outer wall of the middle tube 2. During this upward vortex, a cold air film forms between the middle tube 2 and the outer tube 3, reducing the chance of heat being transferred from the outer side of the middle tube 2 through heat conduction. Finally, the cold vortex airflow passes through the connecting rod 23 and is discharged through the cap 6, reducing the generation of large-scale infrared radiation from the outer wall of the middle tube 2.

[0046] The examples of this specific embodiment are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, any equivalent changes made based on the structure, shape, and principle of this application should be included in the scope of protection of this application.

Claims

1. A generator exhaust infrared characteristic suppression device, characterized in that: The invention comprises an inner cylinder (1), a middle cylinder (2) and an outer cylinder (3) which are coaxially arranged, wherein the middle cylinder (2) is sleeved on the outside of the inner cylinder (1), and the outer cylinder (3) is sleeved on the outside of the inner cylinder (1). The upper end of the inner cylinder (1) is placed outside the middle cylinder (2). An annular upper cover plate (4) is fixedly connected between the outer wall of the inner cylinder (1) and the inner wall of the outer cylinder (3). The annular upper cover plate (4) blocks the gap between the inner cylinder (1) and the outer cylinder (3). The middle cylinder (2) is fixedly connected to the outer cylinder (3). A circular lower cover plate (5) is fixedly connected to the inner wall of the bottom end of the middle cylinder (2). The bottom end of the inner cylinder (1) is placed above the circular lower cover plate (5). The upper end of the outer cylinder (3) is fixedly connected to a cap (6). The outer wall of the inner cylinder (1), the inner wall of the middle cylinder (2), the annular upper cover plate (4) and the circular lower cover plate (5) together enclose an annular swirl mixing chamber (7); The cap (6), the circular lower cover plate (5), the outer wall of the middle cylinder (2) and the inner wall of the outer cylinder (3) together enclose an annular air film cooling chamber (8); Two swirl air inlet channels (9) arranged obliquely and symmetrically along the axis are fixed to the upper part of the outer cylinder (3), and a tail gas pipe (18) is fixed to the outer cylinder (3). The two swirl air inlet channels (9) and the tail gas pipe (18) are both connected to the annular swirl mixing chamber (7); two cooling air inlet channels (10) arranged obliquely and symmetrically along the axis are fixed to the lower part of the outer cylinder (3), and the two cooling air inlet channels (10) are both connected to the annular air film cooling chamber (8). An air supply device (11) for supplying air to the annular swirl mixing chamber (7) or the annular air film cooling chamber (8) is provided in the swirl air inlet channel (9) and the cooling air inlet channel (10).

2. The generator exhaust infrared characteristic suppression device according to claim 1, characterized in that: The air supply device (11) is configured as a blower.

3. The generator exhaust infrared characteristic suppression device according to claim 1, characterized in that: A support tube (16) is provided on the outer tube (3), one end of the support tube (16) is placed outside the outer tube (3), the other end of the support tube (16) passes through the side wall of the outer tube (3) and the side wall of the middle tube (2) and is placed in the middle tube (2), a cooling tube (17) is fixedly connected in the support tube (16), one end of the cooling tube (17) is placed outside the outer tube (3), the other end of the cooling tube (17) is placed in the middle tube (2), the tail gas pipe (18) is passed through the cooling tube (17), the tail gas pipe (18) and the cooling tube (17) are coaxially arranged and fixedly connected, an annular cover (19) is fixed between the end of the cooling tube (17) placed outside the outer tube (3) and the outer side wall of the tail gas pipe (18), and the cooling tube (17) is fixedly connected to the arc-shaped side wall of the end of the cooling tube (17) placed outside the outer tube (3) and is connected to a cooling air intake pipe (20).

4. The generator exhaust infrared characteristic suppression device according to claim 1, characterized in that: A drainage pipe (21) is passed through and fixedly connected to the center of the circular lower cover plate (5), and the edge level of the circular lower cover plate (5) is higher than the center level. A valve (22) is installed on the drainage pipe (21).

5. The generator exhaust infrared characteristic suppression device according to claim 1, characterized in that: The bottom ends of the outer tube (3) and the middle tube (2) are fixed with a same base bracket (12), the base bracket (12) comprising a support plate (121), the four corner ends of the support plate (121) being fixed with vertically arranged support rods (124), a reinforcing rod (122) being fixed between two adjacent support rods (124), and a gasket (123) being fixed to the bottom end of each support rod (124).

6. The generator exhaust infrared characteristic suppression device according to claim 1, characterized in that: A triangular shell (13) is provided at the position of the swirl air inlet channel (9) and the position of the cooling air inlet channel (10). The triangular shell (13) is fixedly connected to the outer cylinder (3). A rectangular air inlet (131) corresponding to the swirl air inlet channel (9) or the cooling air inlet channel (10) is provided on the triangular shell (13).

7. The generator exhaust infrared characteristic suppression device according to claim 1, characterized in that: One or more pairs of symmetrically arranged hanging rings (14) are fixed to the edge side of the cap (6), and each pair of the hanging rings (14) is symmetrically distributed along the center of the cap (6).

8. The generator exhaust infrared characteristic suppression device according to claim 1, characterized in that: Reinforcement rings (15) are fixedly connected to the outer side walls of the outer cylinder (3) and the middle cylinder (2).

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