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CN-224230058-U - Ignition device

CN224230058UCN 224230058 UCN224230058 UCN 224230058UCN-224230058-U

Abstract

The utility model discloses an ignition device which comprises an ignition device main body, an atomization nozzle, a high-energy ignition head and a flame guide pipe, wherein the ignition device main body is cylindrical, an ignition cavity is arranged in the ignition device main body, the atomization nozzle comprises a fuel inlet, a first air inlet nozzle, a mixing cavity and a first outlet, the fuel inlet and the first air inlet nozzle are respectively communicated with the mixing cavity, one end of the mixing cavity is communicated with one end of the ignition cavity through the first outlet, the other end of the ignition cavity is communicated with one end of the flame guide pipe, a second outlet is arranged at the other end of the flame guide pipe, the high-energy ignition head is positioned in the ignition cavity, the first outlet is positioned between the first outlet and the flame guide pipe, and a second air inlet nozzle communicated with the ignition cavity is arranged outside the side wall of the ignition device main body. Compared with the prior art, the utility model can stably and reliably ignite the heater even when dealing with ignition scenes with low temperature and low air flow pressure (such as a supersonic wind tunnel in a low Mach number state).

Inventors

  • LI YAO
  • ZHONG BEIJING

Assignees

  • 北京星煜空天科技有限公司

Dates

Publication Date
20260512
Application Date
20250610

Claims (8)

  1. 1. An ignition device is characterized by comprising an ignition device main body, an atomizing nozzle, a high-energy ignition head and a flame guide pipe; The ignition device main body is cylindrical and is internally provided with an ignition cavity; The atomizing nozzle comprises a fuel inlet, a first air inlet nozzle, a mixing cavity and a first outlet, wherein the fuel inlet and the first air inlet nozzle are respectively communicated with the mixing cavity, and the mixing cavity is communicated with one end of the ignition cavity through the first outlet; The other end of the ignition cavity is communicated with one end of the flame guide pipe, and a second outlet is arranged at the other end of the flame guide pipe; The high-energy ignition head is positioned in the ignition cavity, and the first outlet is positioned between the first outlet and the flame guide pipe; and a second air inlet nozzle communicated with the ignition cavity is arranged on the outer side of the side wall of the ignition device main body between the first outlet and the high-energy ignition head.
  2. 2. The ignition device of claim 1, wherein a first through hole is formed in the side wall of the ignition device main body, and the second air inlet nozzle is communicated with the ignition cavity through the first through hole.
  3. 3. The ignition device of claim 2, wherein the first through holes are provided with a plurality of groups, each group comprises a plurality of first through holes distributed along the circumferential direction of the ignition device main body, an annular connecting piece is arranged on the outer side wall of the ignition device main body, an annular cavity is arranged between the connecting piece and the outer side wall of the ignition device main body, one end of the annular cavity is communicated with all the first through holes, and the other end of the annular cavity is communicated with the second air inlet nozzle.
  4. 4. The ignition device of claim 2 or 3, wherein the second air inlet nozzle is provided with a first air passage and a second air passage in sequence, and wherein: The inner diameters of the whole sections of the second air passages are consistent; One end of the first air passage is communicated with one end of the second air passage, and the inner diameter of the first air passage is consistent with that of the second air passage; The inner diameter of the first through hole is far smaller than the inner diameter of the second air passage.
  5. 5. The ignition device of any one of claims 1-3, wherein an outer sleeve is disposed in the mixing chamber, and an inner sleeve is disposed in the outer sleeve; The device comprises an outer sleeve, an ignition cavity, a first channel, a second channel, a first air inlet nozzle, a lower mixing cavity, a second through hole, a first channel and a first outlet, wherein one end of the outer sleeve is provided with the round platform part which divides the mixing cavity into an upper mixing cavity and a lower mixing cavity; One end of the inner sleeve is provided with a convex part protruding out of the top of the round table part, a plurality of third through holes are formed in the convex part along the radial direction, a second channel is arranged in the inner sleeve, and the fuel inlet, the upper mixing cavity, the third through holes, the second channel and the first outlet are sequentially communicated.
  6. 6. An ignition device as defined in any one of claims 1-3, wherein said flame guide tube is sleeved with a sleeve, a gap between said sleeve and said flame guide tube forms a third passage, one end of said third passage is connected with a third air inlet nozzle, and the other end is aligned with said second outlet.
  7. 7. An ignition device according to any one of claims 1-3, wherein the inner diameter of the ignition cavity is larger than the inner diameter of the flame guiding pipe, a constriction is arranged at the joint of the ignition cavity and the flame guiding pipe, the inner diameter of one end of the constriction is consistent with the inner diameter of the ignition cavity, and the inner diameter of the other end of the constriction is consistent with the inner diameter of the flame guiding pipe.
  8. 8. The ignition device of any one of claims 1-3, wherein a pressure test interface is further provided on a sidewall of the ignition device body, the pressure test interface being in communication with the ignition chamber.

Description

Ignition device Technical Field The utility model relates to the technical field of combustion equipment, in particular to an ignition device. Background The supersonic wind tunnel heater, the engine combustion chamber, the aeroengine and other combustion equipment need to be ignited by the ignition device. In the low Mach number state of the supersonic wind tunnel at the present stage, the traditional high-frequency high-energy igniter is difficult to stably and reliably ignite due to low temperature of the heater and low air flow pressure. Disclosure of Invention The utility model provides an ignition device to solve the technical problem that the traditional high-frequency high-energy igniter is difficult to stably and reliably ignite a supersonic wind tunnel in a low Mach number state. The device is mainly applied to the scenes such as low Mach number state ignition of supersonic wind tunnel, CR ramjet engine combustion chamber ignition, aeroengine ignition and the like. In order to achieve the above purpose, the present utility model adopts the following technical scheme. An ignition device comprises an ignition device main body, an atomizing nozzle, a high-energy ignition head and a flame guide pipe; The ignition device main body is cylindrical and is internally provided with an ignition cavity; The atomizing nozzle comprises a fuel inlet, a first air inlet nozzle, a mixing cavity and a first outlet, wherein the fuel inlet and the first air inlet nozzle are respectively communicated with the mixing cavity, and the mixing cavity is communicated with one end of the ignition cavity through the first outlet; The other end of the ignition cavity is communicated with one end of the flame guide pipe, and a second outlet is arranged at the other end of the flame guide pipe; The high-energy ignition head is positioned in the ignition cavity, and the first outlet is positioned between the first outlet and the flame guide pipe; and a second air inlet nozzle communicated with the ignition cavity is arranged on the outer side of the side wall of the ignition device main body between the first outlet and the high-energy ignition head. Through the structure, high-pressure fuel is injected from the fuel inlet, high-pressure gas is injected from the first air inlet nozzle, mixed and atomized in the mixing cavity and sprayed out from the first outlet, the high-pressure gas injected from the second air inlet nozzle in the ignition cavity is hit again to further improve the atomization effect, and the high-energy ignition head is used for igniting the secondarily atomized fuel and then spraying high-pressure high-speed combustion flame into the airflow to be ignited through the flame guide pipe, so that the device can also be used for stably and reliably igniting the heater of the device in an ignition scene (such as a supersonic wind tunnel in a low Mach number state) with low response temperature and low airflow pressure. In some embodiments, a first through hole is formed in the side wall of the ignition device main body, and the second air inlet nozzle is communicated with the ignition cavity through the first through hole. From this, the high-pressure gas that pours into from the second air inlet nozzle further improves the air current injection depth under the entrapment of first through-hole to further improve and hit the effect, fuel atomization effect is better, ensures ignition success rate of ignition, ignition job stabilization. In some embodiments, the first through holes are provided with a plurality of groups, each group comprises a plurality of first through holes distributed along the circumferential direction of the ignition device main body, an annular connecting piece is arranged on the outer side wall of the ignition device main body, an annular connecting cavity is arranged between the connecting piece and the outer side wall of the ignition device main body, one end of the connecting cavity is communicated with all the first through holes, and the other end of the connecting cavity is communicated with the second air inlet nozzle. Therefore, the annular cavity is filled with high-pressure air rapidly, so that the pressure in the annular cavity is consistent, the injection of the high-pressure air by the first through holes of the cloth is ensured to be consistent, the striking force of the fuel in all directions of the circumference is consistent when the fuel flows through the annular cavity, the atomization effect is more uniform, the ignition success rate of the ignition device is ensured, and the operation of the ignition device is stable. In some embodiments, the second air inlet nozzle is sequentially provided with a first air passage and a second air passage, wherein: The inner diameters of the whole sections of the second air passages are consistent; One end of the first air passage is communicated with one end of the second air passage, and the inner diameter of the first air passage is co