CN114811657A

CN114811657A - Heat insulation structure suitable for pressure fluctuation of burner with air discharged from two sides

Info

Publication number: CN114811657A
Application number: CN202210471025.4A
Authority: CN
Inventors: 丁杰; 赵启扬; 王善金; 王刚; 周杨梓; 周子翔; 余明敏; 刘丹; 武丹; 郑磊
Original assignee: General Designing Institute of Hubei Space Technology Academy
Current assignee: General Designing Institute of Hubei Space Technology Academy
Priority date: 2022-04-28
Filing date: 2022-04-28
Publication date: 2022-07-29
Anticipated expiration: 2042-04-28
Also published as: CN114811657B

Abstract

The utility model relates to an adiabatic structure that fires ware pressure fluctuation suitable for both sides are given vent to anger, this fire ware has a casing, be equipped with a center tube in the casing, its characterized in that, it includes the casing heat insulation layer, the casing heat insulation layer includes outer barrel, interior barrel and cyclic annular articulamentum, the outer wall of outer barrel is used for bonding on the shells inner wall, interior barrel is located the urceolus is internal, the one end of interior barrel with form between the one end of outer barrel and fire a window, just the diameter of interior barrel is greater than the center tube external diameter, the outward flange and the inward flange of cyclic annular articulamentum respectively with outer barrel other end and interior barrel other end are connected, and form the powder column filling space between outer barrel, interior barrel and the cyclic annular articulamentum. The application can solve the problem of debonding of the heat insulating layer of the traditional Chinese medicine column in the related technology.

Description

Heat insulation structure suitable for pressure fluctuation of burner with air discharged from two sides

Technical Field

The application relates to the technical field of gas generators, in particular to a thermal insulation structure suitable for pressure fluctuation of a gas generator with gas discharged from two sides.

Background

The gas generator is usually used as a power device of a solid attitude and orbit control power system, is generally used for providing stable gas working medium for the solid attitude control engine, and is usually paired for use in even numbers.

The traditional fuel gas generator usually has a small combustion surface, and the common fuel column is end surface combustion with a single side and a uniform section, so that large combustion surface combustion with long working time cannot be provided. Under the general condition, the solid attitude control engine is arranged in an annular space of a missile, the space envelope is small, and extremely high requirements are provided for the volume and the mass envelope of the solid attitude control engine. The traditional structure of the gas generator with single-side end face combustion is adopted, the passive quality is high, the space utilization rate is low, and the requirements of future missile weapons on a light-weight efficient solid attitude control engine cannot be met.

The structure of the hair burner with air outlet at two sides is adopted, so that the limitation of the structure of the traditional single-side end face combustion hair burner is effectively avoided. However, the gas is led to each part from the left side or the right side of the central tube by adopting the gas-emitting device with gas outlet at two sides, the pressure of the gas is always fluctuated in the back-and-forth flowing process, and the debonding of the heat-insulating layer of the explosive column is easy to happen.

Disclosure of Invention

The embodiment of the application provides a thermal insulation structure suitable for pressure fluctuation of a hair burner with air discharged from two sides, and aims to solve the problem of debonding of a thermal insulation layer of a traditional Chinese medicine column in the related technology.

The embodiment of the application provides a fire ware pressure fluctuation's adiabatic structure suitable for both sides are given vent to anger, this fire ware has a casing, be equipped with a center tube in the casing, it includes the casing heat insulation layer, the casing heat insulation layer includes:

the outer wall of the outer cylinder body is used for being bonded on the inner wall of the shell;

the inner cylinder body is positioned in the outer cylinder body, a combustion surface window is formed between one end of the inner cylinder body and one end of the outer cylinder body, and the diameter of the inner cylinder body is larger than the outer diameter of the central pipe;

and the outer edge and the inner edge of the annular connecting layer are respectively connected with the other end of the outer cylinder and the other end of the inner cylinder, and a charge column filling space is formed among the outer cylinder, the inner cylinder and the annular connecting layer.

In some embodiments, when the central tube is disposed in the inner cylinder, a second gap formed between the inner cylinder and the central tube is 1-2 mm.

In some embodiments, the included angle α formed by the annular connecting layer and the inner cylinder body is an obtuse angle.

In some embodiments, the included angle α ranges from 100 ° to 145 °.

In some embodiments, an insulating structure for a pressure fluctuation of a burner with two-sided gassing, comprising:

the heat insulation structure further comprises an artificial debonding layer, the artificial debonding layer comprises a first part and a second part which are distributed along the axial direction of the shell and are connected with each other, the first part is bonded on the inner wall of the outer cylinder and is close to the annular connecting layer, and the second part is far away from the annular connecting layer and forms a first gap with the inner wall of the outer cylinder;

an air guide groove is formed in the inner wall of the outer cylinder body and communicated with the first gap.

In some embodiments, the air guide groove extends axially along the housing.

In some embodiments, a projection of the air-guide groove on the surface of the artificial debonding layer is located on the second portion.

In some embodiments, the air guide grooves are multiple and are uniformly distributed along the circumferential direction of the outer cylinder.

In some embodiments, the size of the first gap is 0-0.5 mm, and when the value is 0, the second part is in contact with the inner wall of the outer cylinder body and is not adhered.

In some embodiments, the cross-section of the air guide groove is rectangular or arc-shaped.

The technical scheme who provides this application brings beneficial effect includes:

the application provides a heat insulation structure, the diameter of barrel is greater than the center tube external diameter in it to can form the second clearance between barrel and the center tube in making, in the powder column combustion process, the gas gets into this clearance, can balance the pressure differential of barrel and the heat insulation layer internal and external surface of back head, avoid the interior barrel and the powder column to debond the burning face that arouses and increase the risk.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic diagram of a two-side gassing burner provided in an embodiment of the present application;

FIG. 2 is a schematic view of a housing insulation layer provided by an embodiment of the present application;

FIG. 3 is a diagram of an arrangement of an artificial release layer and a first gap provided by an embodiment of the present application;

FIG. 4 is a schematic view of an air guide slot provided in an embodiment of the present application;

fig. 5 is a schematic diagram of an ignition cartridge provided in an embodiment of the present application.

In the figure: 1. a housing; 2. a shell thermal insulation layer; 20. a gas guide groove; 21. an outer cylinder; 22. an inner cylinder; 220. a combustion face window; 23. an annular connection layer; 24. filling space with the explosive columns; 25. a second gap; 3. manually removing the adhesive layer; 30. a first gap; 4. a central tube; 5. carrying out grain treatment; 6. a top cover; 60. a gas outlet; 61. a top cover heat insulating layer; 7. an ignition cartridge; 70. a cartridge housing; 71. a gas hole; 72. igniting powder; 73. an ignition wire; 74. a gas channel; 75. a sealing film; 8. high temperature resistant filter.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Referring to fig. 1 and 2, an embodiment of the present application provides an adiabatic structure suitable for burner pressure fluctuation of a two-sided gas outlet, the burner is provided with a shell 1, a central tube 4 is arranged in the shell 1, the heat insulation structure comprises a shell heat insulation layer 2, the shell heat insulation layer 2 comprises an outer cylinder 21, an inner cylinder 22 and an annular connecting layer 23, the outer wall of the outer cylinder 21 is adhered to the inner wall of the shell 1, the inner cylinder 22 is positioned in the outer cylinder 21, a burning face window 220 is formed between one end of the inner cylinder 22 and one end of the outer cylinder 21, the diameter of the inner cylinder 22 is larger than the outer diameter of the central tube 4, the outer edge and the inner edge of the annular connecting layer 23 are respectively connected with the other end of the outer cylinder 21 and the other end of the inner cylinder 22, and a grain filling space 24 is formed among the outer cylinder 21, the inner cylinder 22 and the annular connecting layer 23, and the grain 5 can be filled into the grain filling space 24 through the combustion surface window 220.

Fig. 1 shows a hair burner using the above heat insulation structure, wherein both ends of a housing 1 of the hair burner are provided with top covers 6, the inner walls of the top covers 6 are provided with top cover heat insulation layers 61 to protect the top covers 6, the top covers 6 are provided with gas outlets 60, a central tube 4 is arranged in an inner cylinder 22, the central tube 4 is a carbon-carbon central tube, one end of the central tube 4 is communicated with the gas outlet 60 on the side of the end through a high temperature resistant filter 8, and the other end of the central tube is communicated with the gas outlet 60 on the side of the end and a combustion face window 220 through the high temperature resistant filter 8; the ignition cartridge 7 is disposed in the housing 1 and faces the combustion face window 220.

After receiving the ignition command, the ignition cartridge 7 reliably ignites and generates gas, and the gas rapidly guides the annular end surface (e.g., the left annular end surface in fig. 1) of the fuel column 5 through the combustion surface window 220 because the ignition cartridge 7 faces the combustion surface window 220.

The grain 5 is ignited and continuously and stably burns to generate high-temperature and high-pressure gas, after being filtered by the left high-temperature resistant filter 8, a part of the gas can be discharged from the left gas outlet 60, and the other part of the gas enters the central tube 4 and is discharged from the right gas outlet 60 after being filtered by the high-temperature resistant filter 8.

The gas can flow back and forth in the central tube 4, stable high-temperature and high-pressure gas working media are provided for the attitude control engine from two sides, meanwhile, the burner is also used as a part of a gas supply channel or a pipeline, and the gas can be led to each part from the left side or the right side of the central tube.

The diameter of the inner cylinder 22 is larger than the outer diameter of the central tube 4, so that a second gap 25 can be formed between the inner cylinder 22 and the central tube 4, and in the combustion process of the explosive column 5, gas enters the gap, so that the pressure difference between the inner surface and the outer surface of the inner cylinder 22 and the inner surface and the outer surface of the rear end socket heat insulation layer can be balanced, and the risk of combustion surface explosion caused by debonding of the inner cylinder 22 and the explosive column 5 is avoided.

Preferably, when the central tube 4 is disposed in the inner cylinder 22, the size of the second gap 25 formed between the inner cylinder 22 and the central tube 4 is 1-2 mm. The clearance is smaller and is a stagnation area, the temperature of the high-temperature fuel gas is not too high after the high-temperature fuel gas is filled, and the central tube 4 can be effectively protected.

Preferably, the included angle α formed by the annular connecting layer 23 and the inner cylinder 22 is an obtuse angle, and the included angle α ranges from 100 ° to 145 °.

Referring to fig. 3 and 4, in some preferred embodiments, the thermal insulation structure further comprises an artificial release layer 3, wherein the artificial release layer 3 comprises a first part and a second part which are distributed along the axial direction of the shell 1 and are connected with each other, the first part is adhered to the inner wall of the outer cylinder 21 and is close to the annular connecting layer 23, and the second part is far away from the annular connecting layer 23 and forms a first gap 30 with the inner wall of the outer cylinder 21; an air guide groove 20 is formed in the inner wall of the outer cylinder 21, and the air guide groove 20 is communicated with the first gap 30.

In this embodiment, the manual adhesion-removing layer 3 is divided into two parts, one part is the first part that is completely bonded with the outer cylinder 21, and the other part is not bonded with the outer cylinder 21 to form the second part of the first gap 30, and the air guide groove 20 is opened on the inner wall of the outer cylinder 21, and the air guide groove 20 is communicated with the first gap 30, which has the advantages that:

firstly, the existence of the air guide groove enables the stress on the inner side and the outer side of the artificial debonding layer to be balanced rapidly, reduces the interface stress between the explosive column and the artificial debonding layer, and can effectively prevent the interface debonding.

And secondly, when the pressure of the combustion chamber fluctuates continuously, the gas guide groove can adapt to the change of the pressure in real time, so that the pressures of the inner side and the outer side of the artificial debonding layer are balanced, and the integrity of a grain interface is ensured.

The form of air guide groove 20 has the multiple, as an example, for example, adopt spiral, for example again, air guide groove 20 extends along casing 1 axial, on the one hand, can reduce the processing degree of difficulty, and on the other hand is favorable to the gas to get into between the two interfaces of artifical debonding layer 3 and outer barrel 21 to make the inside and outside both sides atress of artifical debonding layer can reach the balance rapidly.

In some preferred embodiments, the first gap 30 has a size of 0 to 0.5mm, and when the value is 0, the second portion is in contact with the inner wall of the outer cylinder 21 and is not adhered. The gap between the second part and the outer cylinder 21 is small and is a stagnation area, so that the temperature of the high-temperature fuel gas is not too high after the high-temperature fuel gas is filled, and the wall surface of the shell can be effectively protected.

The cross-section of the air guide groove 20 may have various forms, such as a rectangular shape as shown in fig. 4, for example, and the four corners of the rectangular shape are chamfered, such as an arc shape.

The air guide grooves 20 are provided in plural and uniformly distributed along the circumference of the outer cylinder 21, for example, there are 12 air guide grooves 20.

The projection of the air guide groove 20 on the surface of the artificial release layer 3 is located on the second portion.

Referring to fig. 5, the ignition cartridge 7 includes a cartridge housing 70, an ignition charge 72 and an ignition wire 73, a charge chamber is disposed inside the cartridge housing 70, a gas hole 71 is further formed on the cartridge housing 70, one end of the gas hole 71 is communicated with the charge chamber, and the other end faces the combustion window 220; ignition charge 72 is stored in the charge storage compartment and ignition wire 73 has one end extending into ignition charge 72 and the other end extending out of cartridge housing 70.

After receiving an ignition instruction, the ignition wire 73 provides ignition current to ignite the ignition charge 72, and high-temperature and high-pressure gas is generated after rapid combustion and is discharged from the gas hole 71 on the end face, so that the charge 5 is ignited through the combustion face window 220. During combustion, cartridge housing 70 itself may also combust.

The cartridge 5 is formed in a ring shape due to the presence of the center tube 4, and for reliable ignition, as shown in fig. 5, the cartridge case 70 is formed in a ring shape with a gas passage 74 formed in the middle thereof in communication with the center tube 4 and the gas discharge port 60, and the powder storage chamber is formed in a ring shape.

The annular and combustible ignition medicine box is adopted, the pressure build-up is fast, the ignition delay time is short, and the end face of the medicine column of the whole igniter can be rapidly and uniformly ignited after ignition.

The ignition medicine box has small structural space, can be directly bonded on the heat insulating layer of the top cover, and has good manufacturability and convenient installation.

The ignition medicine box adopts combustible environment-friendly materials such as celluloid and low-density polyethylene, the main charge adopts a mixed mode of boron-potassium nitrate (or magnesium-polytetrafluoroethylene) and black powder (such as No. 2 small-particle black powder or No. 3 small-particle black powder), and the semiconductor bridge type high-pause-sense detonator is adopted to ignite the main charge, so that the reliability is good, and the long-term storage is convenient.

Referring to fig. 5, a sealing membrane 75 is arranged on the gas hole 71, and the sealing membrane 75 is annular and can seal and protect the ignition charge 72, so that the ignition charge can be stored for a long time.

There are many options for the material of the sealing film 75, and as an example, aluminum foil, or other materials, may be used.

In order to reliably and efficiently ignite the charge 5, as shown in fig. 5, a plurality of gas holes 71 are arranged in an annular array; alternatively, the gas hole 71 extends in an arc shape along the circumferential direction of the cartridge housing 70.

In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An adiabatic structure suitable for pressure fluctuations of a burner that is vented on both sides, the burner having a housing (1), a central tube (4) being provided in the housing (1), characterized in that it comprises a housing insulation layer (2), the housing insulation layer (2) comprising:

the outer cylinder body (21), the outer wall of the outer cylinder body (21) is used for being bonded on the inner wall of the shell (1);

the inner cylinder (22) is positioned in the outer cylinder (21), a combustion surface window (220) is formed between one end of the inner cylinder (22) and one end of the outer cylinder (21), and the diameter of the inner cylinder (22) is larger than the outer diameter of the central pipe (4);

the outer edge and the inner edge of the annular connecting layer (23) are respectively connected with the other end of the outer cylinder body (21) and the other end of the inner cylinder body (22), and a explosive column filling space (24) is formed among the outer cylinder body (21), the inner cylinder body (22) and the annular connecting layer (23).

2. The insulating structure for burner pressure fluctuation suitable for both-side gas discharge according to claim 1, wherein:

when the central tube (4) is arranged in the inner tube body (22), a second gap (25) formed between the inner tube body (22) and the central tube (4) is 1-2 mm.

3. The insulating structure for burner pressure fluctuation suitable for both-side gas discharge according to claim 1, wherein:

the included angle alpha formed by the annular connecting layer (23) and the inner cylinder body (22) is an obtuse angle.

4. The insulating structure for burner pressure fluctuation of a both-side-outlet gas according to claim 3, wherein:

the included angle alpha ranges from 100 degrees to 145 degrees.

5. The insulating structure for burner pressure fluctuation suitable for both-side gas discharge according to claim 1, wherein:

the heat insulation structure further comprises an artificial release layer (3), wherein the artificial release layer (3) comprises a first part and a second part which are distributed along the axial direction of the shell (1) and are connected with each other, the first part is bonded on the inner wall of the outer cylinder body (21) and is close to the annular connecting layer (23), and the second part is far away from the annular connecting layer (23) and forms a first gap (30) with the inner wall of the outer cylinder body (21);

an air guide groove (20) is formed in the inner wall of the outer cylinder body (21), and the air guide groove (20) is communicated with the first gap (30).

6. The insulating structure for burner pressure fluctuation of a both-side-outlet gas according to claim 5, wherein:

the air guide groove (20) extends along the axial direction of the shell (1).

7. The insulating structure for burner pressure fluctuation of a both-side-outlet gas according to claim 5, wherein:

the projection of the air guide groove (20) on the surface of the artificial debonding layer (3) is located on the second part.

8. The insulating structure for burner pressure fluctuation of a both-side-outlet gas according to claim 5, wherein:

the air guide grooves (20) are multiple and are uniformly distributed along the circumferential direction of the outer cylinder body (21).

9. The insulating structure for burner pressure fluctuation of a both-side-outlet gas according to claim 5, wherein:

the size of the first gap (30) is 0-0.5 mm, and when the value is 0, the second part is in contact with the inner wall of the outer cylinder body (21) and is not adhered.

10. The insulating structure for burner pressure fluctuation of a both-side-outlet gas according to claim 5, wherein:

the cross section of the air guide groove (20) is rectangular or arc.