CN110793399A

CN110793399A - Infrared suppression device

Info

Publication number: CN110793399A
Application number: CN201911086473.7A
Authority: CN
Inventors: 秦伯进; 陈华; 陈靓; 陈乔华; 杨俊�; 林玉煌
Original assignee: Jiangsu Josun Air Conditioner Co Ltd
Current assignee: Jiangsu Josun Air Conditioner Co Ltd
Priority date: 2019-11-08
Filing date: 2019-11-08
Publication date: 2020-02-14

Abstract

The invention relates to an infrared suppression device, wherein the upper part of an exhaust pipe is welded with the lower part of a nozzle, a plurality of upward injection flow channels are uniformly distributed on the circumference of the inner wall of the nozzle, a flow guide cone is arranged in the exhaust pipe and the injection flow channels, the upper part and the lower part of the flow guide cone are mutually communicated and are hollow upper and lower centrums, the circumference of the conical surface of the lower centrum is connected in the exhaust pipe through more than three hollow support wing plates, the inner ends of the hollow support wing plates are communicated with the lower centrum, the outer end of the hollow support wing plates penetrates out of an external opening of the exhaust pipe, the upper centrum extends out of the upper part of the nozzle and is fixedly connected in a mixing pipe through more than three support plates in the circumferential direction of the conical surface, the top end of the upper centrum is opened, a shielding cover higher than the lower. The novel high-efficiency jet-flow type mixing device is simple in structure, large in injection amount, good in pneumatic performance, high in mixing efficiency, low in flow loss, obvious in cooling effect and strong in infrared radiation shielding characteristic.

Description

Infrared suppression device

Technical Field

The invention relates to a combat readiness weapon device, in particular to an infrared suppression device.

Background

In the early seventies, the infrared detection technology enters a practical stage. Infrared detection belongs to a passive detection technology, and has good concealment, so that the infrared detection is widely used for weapon guidance. The guidance mode generally comprises two modes of point source infrared imaging and thermal imaging with wave bands of 3-5 mu m and 8-12 mu m. The point source infrared guidance mainly works in a wave band of 3-5 mu m, and has the advantages of small volume, light weight, low manufacturing cost, high resolution and guidance precision, capability of working at night and under unfavorable meteorological conditions, capability of detecting low-altitude targets and the like; the infrared thermal imaging guidance mainly works in a wave band of 8-12 mu m, and has the advantages of high sensitivity and guidance precision, strong anti-interference capability, capability of realizing 'no matter after transmission', quasi-all-weather work, strong adaptability and the like. However, in any wave band, the power system is a main heat source detected by infrared, and the visible metal area of the exhaust pipe exposed at the chimney part of the exhaust system only occupies about 1-2% of the total area, but the infrared radiation signal is strongest due to high temperature and high position. Therefore, it is urgent to reduce the intensity of infrared radiation and improve the viability of the weapon system.

Disclosure of Invention

Aiming at the problems, the invention provides the infrared suppression device which has the advantages of simple structure, large injection amount, good pneumatic performance, high mixing efficiency, low flow loss, obvious cooling effect and strong infrared radiation shielding characteristic.

The technical scheme adopted by the invention is as follows: an infrared suppression device, characterized by: the device comprises an exhaust pipe, a nozzle, a flow guide cone, a mixing pipe, a shielding cover and a diffusion ring group which are uniformly arranged on the same central axis, wherein the lower part of the nozzle is welded at the upper part of the exhaust pipe, a plurality of upward injection flow channels are uniformly distributed at the circumference of the inner wall of the nozzle, the flow guide cone is arranged in the exhaust pipe and the injection flow channels, the upper part and the lower part of the flow guide cone are mutually communicated and hollow upper and lower centrums, the circumference of the conical surface of the lower centrum is connected in the exhaust pipe through more than three hollow supporting wing plates, the inner end of each hollow supporting wing plate is communicated with the lower centrum, the outer end of each hollow supporting wing plate penetrates out of an external opening of the exhaust pipe, the upper centrum extends out of the upper part of the nozzle and is fixedly connected in the mixing pipe through more than three supporting plates in the circumferential direction of the conical surface, the top end of, the outer opening of the upper end of the shielding cover is fixedly connected with the diffusion ring set through a plurality of rib plates which are uniformly distributed on the circumference.

Further, the lower opening of the mixing pipe is flared outwards.

Furthermore, the middle part of the diversion cone is fixed with the nozzle by a rib plate or round steel in the circumferential direction.

Furthermore, the middle part of the flow guide cone is set to be a smooth drum shape.

Furthermore, a plurality of waist hole groups staggered up and down are axially arranged on the pipe wall of the mixing pipe, and each waist hole group consists of a plurality of horizontal or vertical waist holes uniformly distributed on the circumference.

Furthermore, diffuser ring group includes a plurality of diffuser rings, and the diffuser ring is the cone ring form, and the outer conical surface of next diffuser ring is connected through the gusset of a plurality of circumference equipartitions to the inner conical surface of last diffuser ring, and the lower authority of last diffuser ring is less than the higher authority of next diffuser ring.

Furthermore, the shielding case comprises an upper shielding cylinder, a middle shielding cylinder and a lower shielding cylinder, wherein the upper shielding cylinder and the lower shielding cylinder are in a cone cylinder shape, the middle shielding cylinder is in an inverted cone cylinder shape, and the upper shielding cylinder, the middle shielding cylinder and the lower shielding cylinder are sequentially and vertically connected.

The high-temperature gas exhausted by the weapon equipment exhaust system firstly enters the exhaust pipe and then enters the nozzle, and is divided into a plurality of high-temperature gas flows by the guide cone, due to the injection principle, the turbulent dispersion action of jet flow, the surrounding cold air flow is attracted and enters the mixing pipe together with the high-temperature exhaust, the cold and hot gas is fully mixed, the high-temperature exhaust of the system is reduced, and the cooled mixed gas is exhausted from the upper opening after the pressure of the diffuser ring set is recovered, so that the aim of reducing the exhaust temperature is fulfilled. In addition, the hollow supporting wing plate sucks cold air in a negative pressure mode at the upper opening of the exhaust pipe and sprays the cold air out of the openings at the top ends of the lower cone body and the upper cone body, the cold air around the hollow supporting wing plate is sucked in the diversion cone, between the mixing pipe and the nozzle, between the shielding cover and the mixing pipe and between the diffusion rings of the diffusion ring group under the action of the negative pressure, and cold air films are generated on the inner wall of the diversion cone, the inner wall of the mixing pipe and the inner wall of the diffusion rings, so that the strong infrared radiation of exposed metal is greatly. Because flowing cold air exists between the shielding cover and the mixing pipe, the shielding cover plays a role in shielding heat radiation of the mixing pipe, and compared with a traditional infrared suppressor, the infrared suppressor has the characteristic that the two fluids are mixed without the aid of compression action of other solid machines.

The device mainly reduces the temperature of waste gas discharged by a power system, reduces the target characteristics, and improves the electronic countermeasure capability of multi-batch attack, thereby achieving the purpose of infrared stealth, improving the fighting capacity and the viability of the infrared stealth device, and solving the confusion that a weapon system is easy to be tracked and intercepted by an infrared weapon.

Drawings

FIG. 1 is a schematic view of the structure of the present invention.

In the figure: the device comprises an exhaust pipe 1, a hollow support wing plate 2, a nozzle 3, a jet flow channel 4, a guide cone 5, an upper cone 51, a lower cone 52, a guide cone opening 53, a mixing pipe 6, a flaring 61, a waist hole 62, a shielding cover 7, an upper shielding cylinder 71, a middle shielding cylinder 72, a lower shielding cylinder 73, a diffuser ring group 8 and a diffuser ring 81.

Detailed Description

The following further description is made in conjunction with the accompanying drawings and examples.

As shown in figure 1, an infrared suppression device comprises an exhaust pipe 1, a nozzle 3, a diversion cone 5, a mixing pipe 6, a shielding cover 7 and a diffusion ring group 8 which are all arranged on the same central axis, wherein the upper part of the exhaust pipe 1 is welded with the lower part of the nozzle 3, a plurality of upward injection flow passages 4 are uniformly distributed on the circumference of the inner wall of the nozzle 3, the diversion cone 5 is arranged in the exhaust pipe 1 and the injection flow passages, the upper part and the lower part of the diversion cone are mutually communicated, hollow upper and

lower centrums

51 and 52 are arranged, the conical circumference of the lower centrum 52 is connected in the exhaust pipe through more than three hollow support wing plates 2, the inner end of each hollow support wing plate is communicated with the lower centrum, the outer end penetrates out of an external opening of the exhaust pipe, the upper centrum 51 extends out of the upper part of the nozzle and is fixed in the mixing pipe 6 through more than three support plates in the conical circumferential direction, the, the outer sleeve of the mixing pipe 6 is connected with a shielding cover 7 higher than the lower opening of the mixing pipe, the shielding cover and the mixing pipe are fixed through a plurality of rib plates which are uniformly distributed on the inner circumference of a mutual sleeving gap, a plurality of waist hole groups which are staggered up and down are arranged on the pipe wall of the mixing pipe along the axial direction, each waist hole group consists of a plurality of horizontal or vertical waist holes 62 which are uniformly distributed on the circumference, the shielding cover comprises an upper shielding cylinder 71, a middle shielding cylinder 71, a lower shielding cylinder 72 and a lower shielding cylinder 73, the upper shielding cylinder and the lower shielding cylinder are in a cone shape, the middle shielding cylinder is in an inverted cone shape, the upper shielding cylinder, the middle shielding cylinder and the lower shielding cylinder are sequentially and vertically connected, the outer opening at the upper end of the upper shielding cylinder 71 is fixedly connected with a diffuser ring group 8 through a plurality of rib plates which are uniformly distributed on the circumference, the diffuser ring group 8 comprises a plurality of diffuser rings 81, the diffuser rings are in a cone ring shape, the inner cone. .

In order to further improve the stability, the middle part of the guide cone can be fixed with the nozzle by a rib plate or round steel in the circumferential direction.

In order to further improve the airflow performance, the middle part of the flow guide cone can be set to be in a smooth drum shape.

Claims

1. An infrared suppression device, characterized by: the device comprises an exhaust pipe, a nozzle, a flow guide cone, a mixing pipe, a shielding cover and a diffusion ring group which are uniformly arranged on the same central axis, wherein the lower part of the nozzle is welded at the upper part of the exhaust pipe, a plurality of upward injection flow channels are uniformly distributed at the circumference of the inner wall of the nozzle, the flow guide cone is arranged in the exhaust pipe and the injection flow channels, the upper part and the lower part of the flow guide cone are mutually communicated and hollow upper and lower centrums, the circumference of the conical surface of the lower centrum is connected in the exhaust pipe through more than three hollow supporting wing plates, the inner end of each hollow supporting wing plate is communicated with the lower centrum, the outer end of each hollow supporting wing plate penetrates out of an external opening of the exhaust pipe, the upper centrum extends out of the upper part of the nozzle and is fixedly connected in the mixing pipe through more than three supporting plates in the circumferential direction of the conical surface, the top end of, the outer opening of the upper end of the shielding cover is fixedly connected with the diffusion ring set through a plurality of rib plates which are uniformly distributed on the circumference.

2. An ir suppression apparatus according to claim 1, wherein: and the lower opening of the mixing pipe is flared outwards.

3. An ir suppression apparatus according to claim 1, wherein: the middle part of the diversion cone is fixed with the nozzle in the circumferential direction through a rib plate or round steel.

4. An ir suppression apparatus according to claim 1, wherein: the middle part of the flow guide cone is set to be smooth and drum-shaped.

5. An ir suppression apparatus according to claim 1, wherein: the wall of the mixing pipe is provided with a plurality of waist hole groups staggered up and down along the axial direction, and each waist hole group consists of a plurality of horizontal or vertical waist holes uniformly distributed on the circumference.

6. An ir suppression apparatus according to claim 1, wherein: the diffuser ring group includes a plurality of diffuser rings, and the diffuser ring is the cone ring form, and the outer conical surface of next diffuser ring is connected through the gusset of a plurality of circumference equipartitions to the interior conical surface of last diffuser ring, and the lower level of last diffuser ring is less than the higher authority of next diffuser ring.

7. An ir suppression apparatus according to claim 1, wherein: the shielding cover comprises an upper shielding cylinder, a middle shielding cylinder and a lower shielding cylinder, wherein the upper shielding cylinder and the lower shielding cylinder are in cone shapes, the middle shielding cylinder is in inverted cone shapes, and the upper shielding cylinder, the middle shielding cylinder and the lower shielding cylinder are sequentially and vertically connected.