CN211902857U

CN211902857U - Air duct pipe and combustor

Info

Publication number: CN211902857U
Application number: CN202020088425.3U
Authority: CN
Inventors: 卿丽纯; 郭方云; 姚学军; 方怡红; 肖久焜
Original assignee: Hunan Shuangda Electromechanical Co ltd
Current assignee: Hunan Shuangda Electromechanical Co ltd
Priority date: 2020-01-15
Filing date: 2020-01-15
Publication date: 2020-11-10
Anticipated expiration: 2030-01-15

Abstract

The utility model provides an air duct pipe and combustor, air duct pipe have air intake and air outlet. An air inlet section is formed at one end of the air inlet, a mixing section is formed at one end of the air outlet, and the inner diameter of the mixing section is larger than that of the air inlet section. The application provides an air duct pipe is greater than the internal diameter of air inlet section through the internal diameter that sets up the mixing section for pressure wind is when passing through the air duct pipe, and wind pressure and wind speed obtain certain reduction at the in-process by air inlet section to mixing section, are favorable to spun fuel and air to mix more fully in the combustor, thereby have improved the combustion efficiency of fuel, and then have improved energy utilization.

Description

Air duct pipe and combustor

Technical Field

The utility model relates to an instant heating type aircraft deicing vehicle field especially relates to an air duct pipe and combustor.

Background

In the field of instant aircraft deicing vehicles, when a heater is used for heating deicing fluid, heat comes from combustion reaction in a combustor. Air is needed for combustion reaction, and heat generated by combustion needs to be transferred to the deicing fluid in the furnace body through pressure wind. The air in the pressure wind is primarily mixed with the atomized oil and the mixed oil-gas mixture is sent into the combustion chamber, so that the sufficient combustion is facilitated, and the heat generated by the combustion is conveyed into the furnace body through the pressure wind.

In the prior art, the oil gas combustion efficiency of a combustor in a heater of an airplane deicing vehicle is low, so that the energy utilization rate is low.

SUMMERY OF THE UTILITY MODEL

In view of the above, embodiments of the present disclosure are directed to an air duct and a combustor, so as to solve the problem of low energy utilization of the combustor.

In order to achieve the above object, an aspect of the embodiments of the present application provides an air duct pipe, which has an air inlet and an air outlet; the one end of air intake is formed with the air inlet section, the one end of air outlet is formed with the mixing section, the internal diameter of mixing the section is greater than the internal diameter of air inlet section.

Further, the air duct pipe comprises a transition section, and the transition section is connected between the air inlet section and the mixing section.

Further, the inner surface of the transition section is a circular table top; and/or the transition section is in circular arc transition with the air inlet section and the mixing section respectively.

Further, the air duct pipe includes a mouth-closing section, the mouth-closing section is formed at one end of the air outlet of the air duct pipe, the mouth-closing section is adjacent to the mixing section, and the inner diameter of the mouth-closing section is smaller than that of the mixing section.

The utility model provides an air duct pipe, through setting up air inlet section and mixing section, and mixing section's internal diameter is greater than the internal diameter of air inlet section to when making pressure wind flow through air duct pipe, it is great at air inlet section internal pressure, and in mixing section, because the increase of air duct pipe internal diameter, the pressure of pressure wind reduces, is favorable to air and fuel to mix fully in mixing section, thereby has improved fuel utilization ratio, has improved the utilization ratio of energy promptly.

On the other hand of the embodiment of this application provides a combustor, including combustion head and combustion chamber, the combustion head include the nozzle and above a wind channel pipe in, the nozzle set up in the air inlet section, the combustion chamber passes through the air outlet with wind channel pipe intercommunication.

Further, the combustion head comprises a flame stabilizing disc, and the flame stabilizing disc is arranged at one end, close to the air outlet, in the air inlet section.

Furthermore, the periphery of the flame stabilizing disc and the inner wall of the air duct pipe are arranged at intervals.

Further, the flame stabilizing disc is provided with exhaust ports distributed along the radial direction.

Further, the opening degree of the exhaust port is increased from the periphery to the center of the flame stabilizing disc.

Further, the burner includes an igniter and a plurality of combustion heads, the igniter being mounted within one of the plurality of combustion heads.

The combustor that this application embodiment provided has same technological effect owing to adopted above-mentioned air duct pipe, no longer gives unnecessary details here.

Drawings

Fig. 1 is a schematic structural diagram of an air duct provided in an embodiment of the present application;

FIG. 2 is a cross-sectional view of one direction of the duct provided by an embodiment of the present application; and

fig. 3 is a schematic structural diagram of a combustor according to an embodiment of the present application.

Description of reference numerals:

11. an air inlet; 12. an air outlet; 13. an air inlet section; 14. a mixing section; 15. a transition section; 16. a mouth-closing section; 10. an air duct pipe; 20. a burner head; 21. a nozzle; 22. a flame stabilizing disc; 221. an exhaust port; 30. a combustion chamber; 40. an igniter; 50. a centrifugal fan.

Detailed Description

It should be noted that, in the present application, technical features in examples and embodiments may be combined with each other without conflict, and the detailed description in the specific embodiment should be understood as an explanation of the gist of the present application and should not be construed as an improper limitation to the present application.

The directional terms used in the description of the present application are used for convenience in describing the present application and for simplicity in description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present application.

In one aspect of the present embodiment, referring to fig. 1 and 2, an air duct 10 is provided, and the air duct 10 has an air inlet 11 and an air outlet 12. An air inlet section 13 is formed at one end of the air inlet 11, a mixing section 14 is formed at one end of the air outlet 12, and the inner diameter of the mixing section 14 is larger than that of the air inlet section 13.

In an embodiment, please refer to fig. 1 to 3, which take an application of the duct 10 in a combustor as an example. The burner comprises a burner head 20, the burner head 20 comprises a nozzle 21 and a duct 10, and the nozzle 21 is arranged in the air intake section 13. The pressure wind output by the centrifugal fan 50 enters the air duct pipe 10 from the air inlet 11, and the wind pressure is larger in the air inlet section 13. After the pressure wind enters the mixing section 14 from the air inlet section 13, the air pressure of the pressure wind is reduced to a certain extent and the wind speed is reduced because the inner diameter of the air inlet section 13 is smaller than that of the mixing section 14. The fuel injected from the nozzle 21 enters the mixing chamber to facilitate thorough mixing of the fuel with the air.

The application provides an air duct pipe 10, the internal diameter through setting up air duct pipe 10 mixing section 14 is greater than the internal diameter of air inlet section 13, make pressure wind through air duct pipe 10, by air inlet section 13 to mixing section 14 in-process, wind pressure and wind speed all obtain certain reduction, thereby be favorable to nozzle 21 and fuel in the combustor to mix fully in mixing section 14, improved the combustion efficiency of fuel, and then improved the utilization ratio of energy.

In one embodiment, referring to fig. 1 and 2, the present application provides a duct 10 including a transition section 15, the transition section 15 being connected between the intake section 13 and the mixing section 14. Through setting up changeover portion 15, prevent that air duct pipe 10 from taking place the sudden change by air inlet section 13 to the in-process internal diameter of mixing section 14, and then prevent that the wind pressure and the wind speed of the pressure wind of the air duct pipe 10 of flowing through from taking place the sudden change, cause the unstability of combustion reaction, influence the performance of combustor.

In one embodiment, referring to fig. 1 and 2, the transition section 15 of the duct 10 is a circular table. The inner surface of the transition section 15 is a circular table surface, so that the inner surface of the air duct pipe 10 is in smooth transition from the air inlet section 13 to the mixing section 14, and thus, the strength of the air duct pipe 10 is improved, and the stability of the air pressure and the air speed of the pressure air flowing through the air duct pipe 10 is further facilitated.

In one embodiment, referring to fig. 1 and 2, the transition section 15 of the duct 10 is in arc transition with the air intake section 13 and the mixing section 14. The smoothness of transition between the transition section 15 and the air inlet section 13 and between the transition section 15 and the mixing section 14 is improved through arc transition, so that the stability of wind pressure and wind speed is improved, and the structural strength of the air duct pipe 10 is improved.

Preferably, the inner surface of the transition section 15 is a circular table surface, and the transition section 15 and the air inlet section 13 and the mixing section 14 are in circular arc transition. This can maximize the stability of the wind pressure and wind speed in the duct pipe 10 and the structural strength of the duct pipe 10.

In one embodiment, referring to fig. 1 and 2, the duct tube 10 provided herein includes a closing section 16, the closing section 16 is formed at one end of the air outlet 12 of the duct tube 10, the closing section 16 is adjacent to the mixing section 14, and an inner diameter of the closing section 16 is smaller than an inner diameter of the mixing section 14. Specifically, the inner diameter of the throat section 16 gradually decreases. After the pressure air is primarily mixed with the fuel in the mixing section 14 through the air duct pipe 10, the pressure air flowing in along the inner wall of the air duct pipe 10 is not completely mixed with the fuel, and by arranging the closing section 16, a part of the pressure air flowing in along the inner wall of the air duct pipe 10 flows back into the mixing section 14 through the closing section 16 in different directions and then flows out of the air duct pipe 10 after being fully mixed with the fuel, so that the air and the fuel are more uniformly mixed.

Preferably, the inner surface of the mouth-piece 16 has an inner arc surface in cross section in the axial direction of the air duct 10, which not only improves the smoothness of the mouth-piece 16, but also facilitates the sufficient mixing of the air and the fuel.

Referring to fig. 3, the burner includes a burner head 20 and a combustion chamber 30, the burner head 20 includes a nozzle 21 and any one of the above-mentioned middle air duct pipes 10, the nozzle 21 is disposed in the air intake section 13, and the combustion chamber 30 is communicated with the air duct pipe 10 through the air outlet 12. Specifically, the pressure wind provided by the centrifugal fan 50 is continuously supplied with air, the nozzle 21 injects fuel, and the fuel is brought into the mixing section 14 by the pressure wind, is sufficiently mixed with the air, and then is sufficiently combusted in the combustion chamber 30. It will be appreciated that the fuel injected by the nozzle 21 may be a gas, such as natural gas, or a liquid, such as fuel oil. Preferably, the fuel sprayed from the nozzle 21 is atomized, and the atomized fuel has smaller molecules, so as to increase the contact area between the fuel and the air, thereby facilitating the full combustion of the fuel.

The combustor provided by the application has the same technical effects due to the adoption of the air duct pipe 10, and the details are not repeated herein.

In an embodiment, referring to fig. 3, in the burner provided by the present application, the burner head 20 includes a flame stabilizing disk 22, and the flame stabilizing disk 22 is disposed at an end of the air intake section 13 close to the air outlet 12. It will be appreciated that the air and fuel are mixed and then enter the combustion chamber 30 for combustion reaction, and the flame stabilizing disc 22 is provided to prevent the flame generated by combustion from spreading into the air duct 10, which may cause adverse effects. Furthermore, the flame stabilizing disc 22 can make the air and the fuel mixed in the mixing section 14 enter the combustion chamber 30 more stably, and prevent the occurrence of undesirable phenomena such as deflagration.

Further, in an embodiment, referring to fig. 3, the present application provides a burner in which the flame stabilizing disk 22 is spaced from the inner wall of the air duct 10. It can be understood that when there is a gap between the periphery of the flame stabilizing disc 22 and the inner wall of the air duct pipe 10, part of the pressure air enters the mixing chamber through the gap along the inner wall of the air duct pipe 10, and the pressure air entering the mixing chamber through the gap has a larger air pressure and a faster air speed, which can effectively reduce the phenomenon that the fuel oil is attached to the inner wall of the air duct pipe 10.

In one embodiment, referring to fig. 3, the present application provides a burner having a flame stabilizing disk 22 with radially disposed exhaust ports 221. Specifically, the pressure wind drives the fuel to flow into the combustion chamber 30 through the exhaust port 221, the fuel and the air can be continuously and stably mixed through the exhaust port 221 and then enter the combustion chamber 30, the stability of the combustion reaction is improved, and the exhaust port 221 is radially distributed along the flame stabilizing disc 22, so that the mixture of the fuel and the air is favorably filled in the combustion chamber 30, and the fuel is combusted more sufficiently and the heat distribution range is wider.

Preferably, in an embodiment, referring to fig. 3, the burner provided by the present application has an opening degree of the exhaust port 221 that is greater from the periphery to the center of the flame stabilizing disc 22. Therefore, when the pressure air passes through the exhaust port 221 of the flame stabilizing disc 22, the pressure air does not enter the combustion chamber 30 along the original direction, but passes through the exhaust port 221, the direction of the pressure air is changed by the flame stabilizing disc 22, and the pressure air flows in different directions, so that the mixture of the fuel and the air flows into the combustion chamber 30 spirally, the mixture of the fuel and the air is more favorably filled in the combustion chamber 30, the heat distribution is more uniform, and the combustion efficiency of the fuel is further improved.

In one embodiment, referring to FIG. 3, the present application provides a burner comprising an igniter 40 and a plurality of burner heads 20, the igniter 40 being mounted within one of the plurality of burner heads 20. The fuel and the air are mixed and then meet the open fire to generate combustion reaction, when the burner is started, in the combustion head 20 provided with the igniter 40, when the fuel and the air are primarily mixed in the mixing section 14, the ignition of the igniter 40 is used for primary combustion, and the fuel and the air are further fully combusted after entering the mixing chamber. In the combustion head 20 without the igniter 40, the fuel and the air are initially mixed in the mixing section 14 and then enter the combustion chamber 30, and the combustion is started when meeting an open flame. Once the burner is turned on, the igniter 40 is turned off.

It can be understood that, by providing a plurality of combustion heads 20, not only the maximum amount of heat that can be provided by the burner can be increased, but also different combustion gears can be achieved by controlling the opening number of the combustion heads 20 and the injection amount of the nozzles 21, so as to control the amount of combustion heat more accurately. Specifically, the amount of ejection from the nozzle 21 may be controlled by controlling the opening degree of the nozzle 21, or by controlling the pressure of the nozzle 21.

The various embodiments/implementations provided herein may be combined with each other without contradiction.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An air duct pipe is characterized in that the air duct pipe is provided with an air inlet and an air outlet;

the one end of air intake is formed with the air inlet section, the one end of air outlet is formed with the mixing section, the internal diameter of mixing the section is greater than the internal diameter of air inlet section.

2. The duct of claim 1, wherein the duct includes a transition section connected between the intake section and the mixing section.

3. The duct tube of claim 2, wherein the inner surface of the transition section is a circular table; and/or the presence of a gas in the gas,

the transition section is respectively in circular arc transition with the air inlet section and the mixing section.

4. The duct pipe according to any one of claims 1 to 3, wherein the duct pipe includes a closed section formed at an end of the outlet of the duct pipe, the closed section being adjacent to the mixing section, the closed section having an inner diameter smaller than an inner diameter of the mixing section.

5. A combustor is characterized by comprising a combustion head and a combustion chamber, wherein the combustion head comprises a nozzle and an air duct pipe as claimed in any one of claims 1 to 4, the nozzle is arranged in the air inlet section, and the combustion chamber is communicated with the air duct pipe through the air outlet.

6. The burner of claim 5, wherein the burner head comprises a flame stabilizing disk disposed at an end of the air intake section proximate the air outlet.

7. The burner of claim 6, wherein the flame stabilizing disk is spaced from the inner wall of the duct tube by a perimeter thereof.

8. The burner of claim 6, wherein the flame stabilizing disk has radially distributed exhaust ports.

9. The burner of claim 8, wherein the opening degree of the exhaust port is increased from the periphery to the center of the flame stabilizing disc.

10. A burner as claimed in any one of claims 5 to 9, wherein said burner comprises an igniter and a plurality of said burner heads, said igniter being mounted in one of said plurality of burner heads.