Solid fuel gas generator for ejection and launching device

Abstract

The invention discloses a solid fuel gas generator for ejection. The solid fuel gas generator comprises a shell assembly, an igniter, a powder baffle, a powder column and a throat liner. A through hole I is formed in one end of the shell assembly, and a through hole II is formed in the other end; the throat liner is coaxially arranged in the through hole II; the igniter is connected to the end, where the through hole I is located, of the shell assembly, one end of the igniter is electrically connected with the outside through a lead, and the other end penetrates through the through hole I and extends into the shell assembly. The medicine baffle is located in the shell assembly and arranged on the igniter in a nested mode. The grain fixing mode is simple, the grain is easy to replace, and the grain fixing device has the advantages of being low in cost, safe, reliable, compact in structure and the like.

Description

Technical Field

[0001] The invention belongs to the technical field of solid gas generators, and in particular relates to a solid gas generator for ejection and a launching device. Background Art

[0002] Ejection refers to the process of shooting out an object by elastic force, pressure, etc., or releasing or ejecting an object from a ramp, launcher or other device. Ejection technology is widely used in aerospace, especially in the field of projectile launch. Except for electromagnetic ejection, other ejection methods rely on the working medium to do work to meet the designed ejection index requirements. According to the type of working medium, ejection methods can be divided into gunpowder gas type, gas-steam mixed type, compressed gas type, hydraulic type and supercritical fluid type.

[0003] The gas-fired catapult is a launch tube in which a gas generator is installed. Electric energy is used to stimulate and ignite the ignition charge. The ignition charge ignites the charge to form the pressure of the high-pressure chamber (combustion chamber), quickly generating high-temperature and high-pressure gas. The gas flows to the launch tube (low-pressure chamber) to form pressure. The pressure difference between the launch tube and the outside world generates thrust to drive the piston to move, thereby achieving actuation and allowing the load to reach a predetermined exit speed when it exits the tube.

[0004] Most existing solid fuel gas generators are of the free-loading type, in which the propellant is fixed by gluing or pressing plates. The process of fixing the propellant is cumbersome and it is difficult to remove the propellant, which makes it difficult to replace or increase or decrease the propellant. Summary of the invention

[0005] In view of this, the present invention provides a solid gas generator and a launching device for ejection. The gas generator has a simple way of fixing the propellant and is easy to replace. It has the characteristics of low cost, safety and reliability, and compact structure. The propellant can be quickly replaced or increased or decreased and the throat liner can be replaced according to the working status to achieve different predetermined ejection speeds.

[0006] The present invention is achieved through the following technical solutions:

[0007] A solid gas generator for ejection, comprising: a casing assembly, an igniter, a powder baffle, a powder column and a throat liner;

[0008] One end of the housing component is provided with a through hole I, and the other end is provided with a through hole II; the throat liner is coaxially arranged in the through hole II;

[0009] The igniter is connected to the end of the through hole I of the housing component, one end of the igniter is electrically connected to the outside through a lead, and the other end passes through the through hole I and extends into the housing component;

[0010] The drug baffle is located in the housing assembly and is nested on the igniter;

[0011] The drug blocking plate comprises a cylindrical body, an outward-turned edge I located at one end of the cylindrical body and an outward-turned edge II located at the other end of the cylindrical body; the end where the outward-turned edge I is located faces the end where the through hole II of the shell assembly is located; and a plurality of through holes III are arranged on the outer circumferential surface of the cylindrical body;

[0012] A plurality of positioning holes are arranged on the circumference of the outer edge I, and a plurality of positioning grooves are arranged on the outer circumference of the outer edge II; each positioning groove has a positioning hole opposite to it;

[0013] Several medicine columns are arranged along the circumference between the medicine baffle plate and the shell assembly. One end of each medicine column extends into the positioning hole of the outward turning edge Ⅰ, the middle is located in the corresponding positioning groove, and the other end is against the end of the through hole Ⅰ of the shell assembly.

[0014] Furthermore, the igniter includes a plug seat, a medicine box, a cover, an ignition head and ignition powder;

[0015] A blind hole is provided at one end of the plug seat, and the blind hole is blind hole I;

[0016] The medicine box is a cylindrical structure, the coaxial sealing sleeve at the end where the blind hole I is located is arranged at one end of the medicine box, and the sealing cover is arranged at the other end of the medicine box; a plurality of gas holes are arranged along the circumference on the side wall of the medicine box, and a sealing film is arranged at the gas holes; the plug seat, the medicine box and the sealing cover form a sealed space; the ignition head and the ignition powder are arranged in the aforementioned space;

[0017] The inner bottom of the blind hole I is provided with a lead hole I connected to the outside, one end of the lead is electrically connected to the ignition head, and the other end passes through the lead hole I on the plug seat to be electrically connected to the outside.

[0018] Furthermore, the igniter also includes a plug; a blind hole II is provided at one end of the plug seat opposite to the blind hole I, the plug is provided in the blind hole II, and a lead hole II is provided on the plug opposite to the lead hole I, and the lead of the ignition head passes through the lead hole I and the corresponding lead hole II in sequence, and is electrically connected to the outside;

[0019] The plug is made of elastic material.

[0020] Furthermore, the blind hole I is a stepped hole, including a large diameter hole located at the end of the plug seat and a small diameter hole located inside the large diameter hole. The large diameter hole and the coaxial sealing sleeve are arranged on the medicine box, and sealant is arranged in the small diameter hole.

[0021] Furthermore, the number of the positioning holes is greater than the number of the positioning grooves.

[0022] Furthermore, a sealing film is provided at one end of the throat liner facing the outer side of the shell assembly, and the igniter is sealed and connected to the shell assembly.

[0023] Furthermore, a protective cap is provided at the end of the through hole II of the housing component, and the diameter of the protective cap is larger than the diameter of the through hole II.

[0024] Furthermore, the grain may be a tubular grain and / or a square grain, and may use one or more of a double-base propellant, a modified double-base propellant, and a composite propellant.

[0025] Furthermore, the throat liner is made of alloy steel, and the housing assembly is made of alloy aluminum.

[0026] A launching device for launching a load, based on the solid gas generator for ejection, the launching device comprises the solid gas generator, a piston and a launching tube;

[0027] One end of the launch tube is open and the other end is provided with a through hole IV, the piston is located in the launch tube, one end of the piston is open and the other end is closed; the open end of the piston faces the end where the through hole IV of the launch tube is located; the solid gas generator is sealed and fixedly connected to the launch tube, the end where the through hole I of the solid gas generator is located is located outside the launch tube, the end where the through hole II of the solid gas generator is located passes through the through hole IV and enters the launch tube, and is located in the opening of the piston;

[0028] The load to be fired is located within the firing tube and contacts the outside of the closed end of the piston.

[0029] Beneficial effects:

[0030] (1) The present invention provides a solid fuel gas generator for ejection. By inserting one end of the charge into the positioning hole of the charge baffle plate and abutting the other end against the end of the through hole I of the shell assembly, the charge is axially limited. The charge is then radially limited by the positioning groove of the charge baffle plate to fix the charge. This charge fixing method is simple and easy to replace. It has the characteristics of low cost, safety and reliability, and compact structure. The type of charge can be quickly replaced and the amount of charge can be increased or decreased according to the working state, thereby changing the predetermined ejection speed of the load.

[0031] (2) In the present invention, the number of positioning holes of the drug baffle plate is greater than the number of positioning grooves, which is convenient for providing a flow channel for the gas so that the gas can flow out of the housing assembly.

[0032] (3) In the present invention, a sealing film is provided at one end of the throat liner facing the outer side of the shell assembly, and the igniter is sealed and connected to the shell assembly, thereby forming a sealed combustion chamber in the shell assembly, which is conducive to the combustion of the propellant in the combustion chamber to form high-temperature and high-pressure combustion gas.

[0033] (4) A protective cap is provided at the end where the through hole II of the housing assembly of the present invention is located, which can protect the sealing film of the throat liner and prevent the sealing film from being damaged during transportation and assembly, resulting in sealing failure.

[0034] (5) The igniter of the present invention further comprises a plug, the provision of which can prevent the lead wire of the ignition head from being worn, thereby improving the ignition reliability.

[0035] (6) The throat liner of the present invention is made of alloy steel, and the shell assembly is made of alloy aluminum. The alloy steel is stronger than the alloy aluminum, which can prevent the high-temperature gas from excessively burning the throat liner and affecting the inner diameter of the throat liner, resulting in excessive deviation in the subsequent load exit speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a structural schematic diagram of the gas generator of the present invention;

[0037] Figure 2 Schematic diagram of the drug baffle structure;

[0038] Figure 3 It is a schematic diagram of the igniter structure;

[0039] Figure 4 It is a schematic diagram of the launch system structure;

[0040] Among them, 1-igniter, 2-sealing ring, 3-head, 4-shell, 5-charge column, 6-charge baffle, 7-throat lining, 8-protective cap, 9-plug, 10-plug seat, 11-charge box, 14-cover, 15-solid gas generator, 16-piston, 17-launch tube, 18-load. DETAILED DESCRIPTION

[0041] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0042] Embodiment 1:

[0043] This embodiment provides a solid gas generator for ejection. Figure 1 , including a housing assembly, an igniter 1, a powder baffle 6, a powder column 5 and a throat liner 7;

[0044] One end of the housing assembly is provided with a through hole I, and the other end is provided with a through hole II; the throat liner 7 is coaxially and detachably arranged in the through hole II;

[0045] The igniter 1 is connected to the end of the through hole I of the housing component. One end of the igniter 1 is electrically connected to the outside through a lead wire, and the other end passes through the through hole I and extends into the housing component.

[0046] The drug blocking plate 6 is located in the housing assembly and is nested on the igniter 1;

[0047] See attached Figure 2 The medicine baffle 6 includes a cylindrical body, an outward-turned edge I located at one end of the cylindrical body and an outward-turned edge II located at the other end of the cylindrical body; the end where the outward-turned edge I is located faces the end where the through hole II of the shell assembly is located; and a plurality of through holes III are arranged on the outer circumferential surface of the cylindrical body;

[0048] A plurality of positioning holes are arranged on the circumference of the outer edge I, and a plurality of positioning grooves are arranged on the outer circumference of the outer edge II; each positioning groove has a positioning hole opposite to it;

[0049] A plurality of medicine columns 5 are arranged along the circumference between the medicine baffle plate 6 and the shell assembly, one end of each medicine column 5 extends into the positioning hole of the outer turn edge Ⅰ, the middle is located in the corresponding positioning groove, and the other end is against the end of the through hole Ⅰ of the shell assembly.

[0050] The present embodiment provides a solid fuel gas generator for ejection, in which one end of the charge column 5 is inserted into the positioning hole of the charge baffle plate 6 and the other end is abutted against the end of the through hole I of the outer shell assembly to limit the charge column 5 axially, and then the positioning groove of the charge baffle plate 6 is used to limit the charge column 5 radially, so that the charge column 5 can be fixed. This method of fixing the charge column 5 is simple and easy to replace the charge column 5, and has the characteristics of low cost, safety and reliability, and compact structure. The type of charge column 5 can be quickly replaced and the number of charge columns 5 can be increased or decreased according to the working status, thereby changing the predetermined ejection speed of the load 18.

[0051] In addition, the setting of the throat liner 7 allows the high-temperature and high-pressure combustion gas to be ejected rearwardly, and the predetermined ejection speed of the load 18 can be changed by replacing the throat liner 7.

[0052] Furthermore, the number of the positioning holes is greater than the number of the positioning grooves, so as to provide a flow channel for the gas so that the gas can flow out of the housing assembly.

[0053] A sealing film is provided at one end of the throat liner 7 facing the outer side of the shell assembly; the igniter 1 is sealed and connected to the shell assembly, so that a sealed combustion chamber is formed in the shell assembly, which is conducive to the combustion of the charge 5 in the combustion chamber to form high-temperature and high-pressure combustion gas.

[0054] A protective cap 8 is provided at the end of the through hole II of the housing component. The diameter of the protective cap 8 is larger than the diameter of the through hole II and is used to protect the sealing film of the throat liner 7 to prevent the sealing film from being damaged during transportation and assembly, resulting in sealing failure. Specifically, the protective cap 8 is an elastic rubber part.

[0055] The shell assembly includes a head 3 and a shell 4, one end of the shell 4 is open, and the through hole II is located at the other end of the shell 4; the head 3 includes an integrally formed base plate and an annular boss located on one side of the base plate; the through hole I is located on the base plate and is coaxial with the annular boss; the inner diameter of the annular boss is larger than the inner diameter of the through hole I; the inner wall of the annular boss is sleeved on the open end of the shell 4 and is fixedly connected to the shell 4; the other end of the aforementioned drug column 5 abuts against the end of the through hole I of the shell assembly, that is, the drug column 5 abuts against the base plate. Specifically, the inner wall of the annular boss is connected to the shell 4 by threads, and a sealing ring is provided between the inner wall of the annular boss and the outer wall of the shell 4;

[0056] See attached Figure 3The igniter 1 comprises a plug seat 10, a medicine box 11, a cover 14, an ignition head and ignition powder;

[0057] A blind hole is provided at one end of the plug seat 10, and the blind hole is referred to as blind hole I;

[0058] The medicine box 11 is a cylindrical structure, a coaxial sealing sleeve at the end where the blind hole I is located is arranged at one end of the medicine box 11, and a cover 14 is arranged at the other end of the medicine box 11; a plurality of gas holes are arranged along the circumference on the side wall of the medicine box 11, and a sealing film is arranged at the gas holes, and the plug seat 10, the medicine box 11 and the cover 14 form a sealed space; the ignition head and the ignition powder are both arranged in the aforementioned space; the closed space prevents the moisture contained in the air in the gas generator from causing the ignition powder to become damp during storage, thereby affecting the ignition performance.

[0059] The inner bottom of the blind hole I is provided with a lead hole I connected to the outside, one end of the lead is electrically connected to the ignition head, and the other end passes through the lead hole I on the plug seat 10 to be electrically connected to the outside; the number of the lead holes I is more than one;

[0060] Furthermore, the igniter 1 further comprises a plug 9; the plug 9 is made of elastic material; a blind hole II is arranged at one end of the plug seat 10 opposite to the blind hole I, the plug 9 is arranged in the blind hole II, the plug 9 has a lead hole II arranged opposite to the lead hole I, the lead of the ignition head passes through the lead hole I and the corresponding lead hole II in turn, and is electrically connected to the outside; the setting of the plug 9 can prevent the lead of the ignition head from being worn. In a specific embodiment, the material of the plug 9 is rubber.

[0061] Furthermore, the blind hole I is a stepped hole, including a large diameter hole located at the end of the plug seat 10 and a small diameter hole located inside the large diameter hole. The large diameter hole and the coaxial sealing sleeve are arranged on the medicine box 11, and a sealant is arranged in the small diameter hole.

[0062] Furthermore, the plug seat 10 is a stepped cylindrical structure, including a small diameter section, a large diameter section and a middle diameter section connected in sequence; the middle diameter section and the large diameter hole of the blind hole I are radially opposite; the middle diameter section of the plug seat 10 extends into the through hole I of the substrate and is fixedly connected to the through hole I; the large diameter section is located outside the substrate;

[0063] A coaxial annular groove I is arranged at one end of the middle diameter section located at the large diameter section; an annular groove II is arranged on the outer side of the substrate, which is coaxial with and connected to the through hole I; the annular groove I and the annular groove II are radially butted to form an annular groove III, and a sealing ring 2 is arranged in the annular groove III;

[0064] The step surface formed by the middle diameter section and the large diameter section abuts against the base plate to limit the sealing ring 2.

[0065] In one embodiment, the charge 5 may be in the form of a tubular charge and / or a square charge, and may adopt one or more of pyrotechnic products such as double-base propellants, modified double-base propellants, and composite propellants. The outer surface combustion or the inner surface combustion of the charge 5 may be limited as required.

[0066] In one embodiment, the material of the throat liner 7 is high-strength alloy steel, and the shell 4 and the head 3 are high-strength alloy aluminum. The high-strength alloy steel is stronger than the high-strength alloy aluminum, which prevents the high-temperature combustion gas from excessively burning the throat liner 7 and affecting the inner diameter of the throat liner 7, resulting in excessive deviation in the exit speed of the subsequent load 18.

[0067] Embodiment 2:

[0068] This embodiment is based on Embodiment 1 and provides a launching device for launching a payload 18. Figure 4 The launching device includes the solid gas generator 15, the piston 16 and the launching tube 17 in Example 1;

[0069] One end of the launch tube 17 is open and the other end is provided with a through hole IV. The piston 16 is located in the launch tube 17. One end of the piston 16 is open and the other end is closed. The open end of the piston 16 faces the end where the through hole IV of the launch tube 17 is located. The solid gas generator 15 is sealed and fixedly connected to the launch tube 17. The end where the through hole I of the solid gas generator 15 is located is located outside the launch tube 17. The end where the through hole II of the solid gas generator 15 passes through the through hole IV and enters the launch tube 17, and is located in the opening of the piston 16.

[0070] The load 18 to be launched is located in the launch tube 17 and contacts the outside of the closed end of the piston 16.

[0071] In one embodiment, a plurality of connection holes distributed along the circumference are provided on the base plate of the sealing head 3, and the connection between the sealing head 3 and the launching tube 17 is realized through the connection holes. In a specific embodiment, four connection holes are provided.

[0072] Working principle:

[0073] Before using the solid gas generator 15, it is necessary to separate the short-circuited leads of the ignition head and make an electrical connection with the launch system controller; and make a mechanical connection with the launch tube 17 through the connection hole on the head 3.

[0074] During operation, an ignition signal is generated by the launch system controller and transmitted to the ignition head through a fuse, causing the ignition head to ignite and thus ignite the ignition powder. The generated ignition gas is ejected from the sealed gas hole on the powder box 11, and then contacts the surface of the powder column 5 to ignite the powder column 5. The high-temperature and high-pressure gas generated by the combustion of the powder column 5 is ejected from the throat liner 7 into the launch tube 17 to form pressure. The pressure difference between the launch tube 17 and the outside world generates a thrust to push the piston 16 to move, thereby realizing actuation and making the load 18 reach a predetermined exit speed when it exits the tube.

[0075] In summary, the above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A solid gas generator for catapult, characterized in that: include: Case assembly, igniter, powder baffle, grain and throat liner; One end of the housing component is provided with a through hole I, and the other end is provided with a through hole II; the throat liner is coaxially arranged in the through hole II; The igniter is connected to the end of the through hole I of the housing component, one end of the igniter is electrically connected to the outside through a lead, and the other end passes through the through hole I and extends into the housing component; The drug baffle is located in the housing assembly and is nested on the igniter; The drug blocking plate comprises a cylindrical body, an outward-turned edge I located at one end of the cylindrical body and an outward-turned edge II located at the other end of the cylindrical body; the end where the outward-turned edge I is located faces the end where the through hole II of the shell assembly is located; and a plurality of through holes III are arranged on the outer circumferential surface of the cylindrical body; A plurality of positioning holes are arranged on the circumference of the outer edge I, and a plurality of positioning grooves are arranged on the outer circumference of the outer edge II; each positioning groove has a positioning hole opposite to it; Several medicine columns are arranged along the circumference between the medicine baffle plate and the shell assembly. One end of each medicine column extends into the positioning hole of the outward turning edge Ⅰ, the middle is located in the corresponding positioning groove, and the other end is against the end of the through hole Ⅰ of the shell assembly.

2. A solid gas generator for catapult use as claimed in any one of claim 1, characterized in that: The igniter includes a plug seat, a medicine box, a cover, an ignition head and ignition powder; A blind hole is provided at one end of the plug seat, and the blind hole is blind hole I; The medicine box is a cylindrical structure, the coaxial sealing sleeve at the end where the blind hole I is located is arranged at one end of the medicine box, and the sealing cover is arranged at the other end of the medicine box; a plurality of gas holes are arranged along the circumference on the side wall of the medicine box, and a sealing film is arranged at the gas holes; the plug seat, the medicine box and the sealing cover form a sealed space; the ignition head and the ignition powder are arranged in the aforementioned space; The inner bottom of the blind hole I is provided with a lead hole I connected to the outside, one end of the lead is electrically connected to the ignition head, and the other end passes through the lead hole I on the plug seat to be electrically connected to the outside.

3. A solid gas generator for catapult use as claimed in claim 2, characterized in that: The igniter also includes a plug; a blind hole II is arranged at one end of the plug seat opposite to the blind hole I, the plug is arranged in the blind hole II, and a lead hole II is arranged on the plug opposite to the lead hole I. The lead of the ignition head passes through the lead hole I and the corresponding lead hole II in sequence and is electrically connected to the outside; The plug is made of elastic material.

4. A solid gas generator for catapult use as claimed in claim 2, characterized in that: The blind hole I is a stepped hole, including a large diameter hole located at the end of the plug seat and a small diameter hole located inside the large diameter hole. The large diameter hole and the coaxial sealing sleeve are arranged on the medicine box, and sealant is arranged in the small diameter hole.

5. A solid gas generator for catapult use as claimed in any one of claims 1 to 4, characterized in that: The number of the positioning holes is greater than the number of the positioning grooves.

6. A solid gas generator for catapult use as claimed in any one of claims 1 to 4, characterized in that: A sealing film is arranged at one end of the throat liner facing the outer side of the shell component, and the igniter is sealed and connected with the shell component.

7. A solid gas generator for catapult use as claimed in claim 6, characterized in that: A protective cap is arranged at the end where the through hole II of the housing component is located, and the diameter of the protective cap is larger than the diameter of the through hole II.

8. A solid gas generator for catapult use as claimed in any one of claims 1 to 4, characterized in that: The grain can be a tubular grain and / or a square grain, and can use one or more of a double-base propellant, a modified double-base propellant, and a composite propellant.

9. A solid gas generator for catapult use as claimed in any one of claims 1 to 4, characterized in that: The throat liner is made of alloy steel and the housing assembly is made of alloy aluminum.

10. A launching device for launching a payload, based on a solid gas generator for launching according to any one of claims 1 to 9, characterized in that: The launching device comprises the solid gas generator, a piston and a launching tube; One end of the launch tube is open and the other end is provided with a through hole IV, the piston is located in the launch tube, one end of the piston is open and the other end is closed; the open end of the piston faces the end where the through hole IV of the launch tube is located; the solid gas generator is sealed and fixedly connected to the launch tube, the end where the through hole I of the solid gas generator is located is located outside the launch tube, the end where the through hole II of the solid gas generator is located passes through the through hole IV and enters the launch tube, and is located in the opening of the piston; The load to be fired is located within the firing tube and contacts the outside of the closed end of the piston.

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