CN114811657B

CN114811657B - Heat insulation structure suitable for pressure fluctuation of burner with two-side air outlet

Info

Publication number: CN114811657B
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: 2023-06-20
Anticipated expiration: 2042-04-28
Also published as: CN114811657A

Abstract

The utility model relates to a fire and send out heat insulating structure of ware pressure fluctuation suitable for both sides give vent to anger, this fire and send out ware have a casing, be equipped with a center tube in the casing, its characterized in that, including the casing insulating layer, the casing insulating 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 in the urceolus, interior barrel one end with form the fire window between the one end of urceolus, 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 the urceolus other end and interior barrel other end are connected, and form the grain filling space between outer barrel, interior barrel and the cyclic annular articulamentum. The application can solve the problem of debonding of the heat insulation layer of the traditional Chinese medicine column in the related technology.

Description

Heat insulation structure suitable for pressure fluctuation of burner with two-side air outlet

Technical Field

The application relates to the technical field of gas generators, in particular to a heat insulation structure suitable for pressure fluctuation of a gas generator with two-side gas outlet.

Background

The gas generator is generally used as a power device of a solid attitude and orbit control power system, is generally used for providing stable gas working medium for a solid attitude and orbit control engine, and is generally used in pairs in an even number.

The traditional gas generator has smaller burning surface, and the general grain is burned by the end surface with single side and uniform section, so that the large burning surface with long working time can not be provided. In general, the solid attitude control engine is arranged in an annular space of the missile, the space envelope is smaller, and extremely high requirements are put on the volume and the mass envelope of the solid attitude control engine. The traditional single-side end face combustion gas generator structure is adopted, the negative quality is high, the space utilization rate is low, and the requirements of future missile weapons on the light high-efficiency solid attitude control engine can not be met.

The adoption of the burner structure with two air outlets effectively avoids the limitation of the traditional burner structure with a single-side end face. However, by adopting the gas generators with two gas outlets, the gas can be led to each component from the left side or the right side of the central shaft, and the pressure of the gas always fluctuates in the process of flowing back and forth, so that the debonding of the column heat insulation layer is very easy to occur.

Disclosure of Invention

The embodiment of the application provides an adiabatic structure suitable for pressure fluctuation of a burner with two-side air outlet, so as to solve the problem of debonding of a grain insulation layer in the related art.

The embodiment of the application provides a heat insulation structure suitable for pressure fluctuation of a burner with two-sided air outlet, the burner is provided with a shell, a central tube is arranged in the shell and comprises a shell heat insulation layer, and the shell heat insulation layer comprises:

the outer wall of the outer cylinder body is used for being adhered to 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 tube;

the outer edge and the inner edge of the annular connecting layer are respectively connected with the other end of the outer cylinder body and the other end of the inner cylinder body, and a grain filling space is formed among the outer cylinder body, the inner cylinder body 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 is an obtuse angle.

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

In some embodiments, an insulating structure for pressure fluctuation of a burner for two-side gas outlet is characterized in that:

the heat insulation structure further comprises a manual release layer, wherein the manual release 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 adhered to the inner wall of the outer cylinder and is close to the annular connection layer, and the second part is far away from the annular connection 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 the air guide groove is 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 uniformly distributed along the circumferential direction of the outer cylinder body.

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

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

The beneficial effects that technical scheme that this application provided brought include:

the application provides a heat insulation structure, the diameter of its interior barrel is greater than the center tube external diameter to can form the second clearance between barrel and the center tube in making, at the explosive column combustion process, the gas gets into this clearance, can balance the pressure differential of interior barrel and back head heat insulation in-situ surface, avoid interior barrel and explosive column debonding the combustion face that arouses and increase the risk.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

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

FIG. 2 is a schematic view of a thermal insulation layer of a housing according to an embodiment of the present disclosure;

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

FIG. 4 is a schematic diagram of an air guide groove according to an embodiment of the present disclosure;

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 housing insulation layer; 20. an air guide groove; 21. an outer cylinder; 22. an inner cylinder; 220. a combustion face window; 23. an annular connection layer; 24. filling the space with a grain; 25. a second gap; 3. manually releasing the adhesive layer; 30. a first gap; 4. a central tube; 5. a grain; 6. a top cover; 60. a gas outlet; 61. a top cover insulating layer; 7. an ignition cartridge; 70. a cartridge housing; 71. a gas hole; 72. igniting; 73. an ignition wire; 74. a gas passage; 75. a sealing film; 8. a high temperature resistant filter.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of 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 apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present application based on the embodiments herein.

Referring to fig. 1 and 2, the embodiment of the present application provides a heat insulation structure of a burner pressure fluctuation suitable for two-sided air outlet, the burner has a housing 1, a central tube 4 is disposed in the housing 1, the heat insulation structure includes a housing heat insulation layer 2, the housing heat insulation layer 2 includes an outer cylinder 21, an inner cylinder 22 and an annular connection layer 23, the outer wall of the outer cylinder 21 is used for adhering to the inner wall of the housing 1, the inner cylinder 22 is located 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, 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 connection 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 medicine column filling space 24 is formed among the outer cylinder 21, the inner cylinder 22 and the annular connection layer 23, and the medicine column 5 can be filled into the medicine column filling space 24 through the combustion surface window 220.

Fig. 1 shows a burner using the heat insulation structure, wherein two ends of a shell 1 of the burner are respectively provided with a top cover 6, a top cover heat insulation layer 61 is arranged on the inner wall of the top cover 6 to protect the top cover 6, a gas outlet 60 is arranged on the top cover 6, a central tube 4 is arranged in an inner cylinder 22, the central tube 4 adopts a carbon-carbon central tube, one end of the central tube 4 is communicated with the gas outlet 60 on the side where the end is located through a high temperature resistant filter 8, and the other end is communicated with the gas outlet 60 on the side where the end is located and a combustion surface window 220 through the high temperature resistant filter 8; the ignition cartridge 7 is provided in the housing 1 and faces the combustion face window 220.

After the ignition cartridge 7 receives the ignition instruction, it reliably fires and generates the gas, which rapidly ignites the annular end face (e.g., the left annular end face in fig. 1) of the grain 5 through the combustion face window 220 since the ignition cartridge 7 faces the combustion face window 220.

The powder column 5 is ignited and then continuously and stably burnt to generate high-temperature and high-pressure fuel gas, after being filtered by the high-temperature resistant filter 8 on the left side, one part of the fuel gas can be discharged from the fuel gas discharge port 60 on the left side, and the other part of the fuel gas enters the central tube 4 and is discharged from the fuel gas discharge port 60 on the right side after being filtered by the high-temperature resistant filter 8.

The fuel gas can flow back and forth in the central tube 4, stable high-temperature high-pressure fuel gas working medium is provided for the attitude control engine from two sides, meanwhile, the burner is also used as a part of a gas supply channel or pipeline, and the fuel gas can be led to various components 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, fuel gas enters the gap, so that the pressure difference between the inner cylinder 22 and the inner and outer surfaces of the heat insulation layer of the rear seal head can be balanced, and the risk of explosion of the combustion surface 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 second gap 25 formed between the inner cylinder 22 and the central tube 4 is 1-2 mm. The gap is smaller, is a stagnation area, and the temperature of the high-temperature fuel gas after being filled is not too high, so that 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 a manual release layer 3, the manual release layer 3 comprising a first portion and a second portion distributed along the axial direction of the shell 1 and connected to each other, the first portion being bonded to the inner wall of the outer cylinder 21 and being close to the annular connection layer 23, the second portion being distant from the annular connection layer 23 and forming a first gap 30 with the inner wall of the outer cylinder 21; the inner wall of the outer cylinder 21 is provided with an air guide groove 20, and the air guide groove 20 is communicated with the first gap 30.

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

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

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

The air guide groove 20 has various forms, for example, a spiral type is adopted, and for example, the air guide groove 20 extends along the axial direction of the shell 1, so that on one hand, the processing difficulty can be reduced, and on the other hand, the gas can enter between the interface of the manual release layer 3 and the outer cylinder 21, so that the stress on the inner side and the outer side of the manual release layer can be balanced rapidly.

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

The cross section of the air guide groove 20 may take various forms, such as a rectangle as shown in fig. 4, and four corners of the rectangle are chamfered, and further, such as an arc shape.

The number of the air guide grooves 20 is plural, and the air guide grooves 20 are uniformly distributed along the circumferential direction of the outer cylinder 21, for example, 12 air guide grooves are provided.

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

Referring to fig. 5, the ignition cartridge 7 includes a cartridge case 70, an ignition charge 72 and an ignition wire 73, wherein a charge storage chamber is provided in the cartridge case 70, a gas hole 71 is further provided in the cartridge case 70, one end of the gas hole 71 is communicated with the charge storage chamber, and the other end is directed toward a combustion face window 220; the ignition charge 72 is stored in the charge storage chamber, and one end of the ignition wire 73 extends into the ignition charge 72 and the other end extends out of the cartridge housing 70.

Upon receiving the ignition command, the ignition wire 73 supplies an ignition current, ignites the ignition charge 72, rapidly burns to generate high-temperature and high-pressure gas, and is discharged from the gas hole 71 on the end face, thereby igniting the cartridge 5 through the gas face window 220. The cartridge housing 70 itself may also burn during the combustion process.

Due to the presence of the central tube 4, the cartridge 5 is annular, and for reliable ignition, as shown in fig. 5, the cartridge housing 70 is annular, and a gas passage 74 communicating with the central tube 4 and the gas discharge port 60 is formed in the middle thereof, and the powder storage chamber is annular.

The annular and combustible ignition explosive box is adopted, the pressure is built quickly, the ignition delay time is short, and the explosive end face of the whole burner can be ignited quickly and uniformly after ignition.

The ignition cartridge has small structural space, can be directly adhered to the heat insulation layer of the top cover, has good manufacturability and is convenient to install.

The ignition powder box is made of combustible environment-friendly materials such as celluloid and low-density polyethylene, the main powder charge is made of a mixed form 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 main powder charge is ignited by a semiconductor bridge type Gao Du sensitive detonator, so that the ignition powder box is good in reliability and convenient to store for a long time.

Referring to fig. 5, the gas hole 71 is provided with a sealing film 75, and the sealing film 75 is annular, so that the ignition powder 72 can be sealed and protected, and long-term storage is facilitated.

The material of the sealing film 75 is selected from a variety of materials, such as aluminum foil, or other materials.

For reliably and effectively igniting the cartridge 5, as shown in fig. 5, a plurality of gas holes 71 are arranged in an annular array; alternatively, the gas ports 71 extend in an arc along the circumference of the cartridge housing 70.

In the description of the present application, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of description of the present application and simplification of the description, and are not indicative or implying that the apparatus or element in question must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present application. Unless specifically stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

It should be noted that in this 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. Moreover, 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 one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The foregoing is merely a specific embodiment of the application to enable one skilled in the art to understand or practice the 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. A heat insulating structure suitable for pressure fluctuation of a burner with two-sided gas outlet, the burner having a housing (1), a central tube (4) being arranged in the housing (1), characterized in that it comprises a housing heat insulating layer (2), the housing heat insulating layer (2) comprising:

an outer cylinder (21), wherein the outer wall of the outer cylinder (21) is used for being adhered to the inner wall of the shell (1);

an inner cylinder (22), wherein 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 tube (4), so that a second gap (25) is formed between the inner cylinder (22) and the central tube (4);

the annular connecting layer (23), 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 medicine column filling space (24) is formed among the outer cylinder (21), the inner cylinder (22) and the annular connecting layer (23);

the heat insulation structure further comprises a manual release layer (3), wherein the manual 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 connection layer (23), and the second part is far away from the annular connection 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 body (21), and the air guide groove (20) is communicated with the first gap (30).

2. The insulation structure for pressure fluctuation of a burner for two-sided gas discharge according to claim 1, wherein:

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

3. The insulation structure for pressure fluctuation of a burner for two-sided gas discharge according to claim 1, wherein:

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

4. A burner pressure fluctuation insulation structure adapted for two-sided gas outlet as claimed in claim 3, wherein:

the value range of the included angle alpha is 100-145 degrees.

5. The insulation structure for pressure fluctuation of a burner for two-sided gas discharge according to claim 1, wherein:

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

6. The insulation structure for pressure fluctuation of a burner for two-sided gas discharge according to claim 1, wherein:

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

7. The insulation structure for pressure fluctuation of a burner for two-sided gas discharge according to claim 1, wherein:

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

8. The insulation structure for pressure fluctuation of a burner for two-sided gas discharge according to claim 1, wherein:

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

9. The insulation structure for pressure fluctuation of a burner for two-sided gas discharge according to claim 1, wherein:

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