Solid fuel gas generator for cold ejection

Abstract

The present application belongs to the field of gas generator, and relates to a solid gas generator for cold missile launching, which comprises a generator shell, an ignition device and a low-temperature high-pressure mixed working medium generating assembly; the ignition device is arranged in the interior of the generator shell; the low-temperature high-pressure mixed working medium generating assembly is tangentially arranged on the side wall of the generator shell and is in communication with the interior of the generator shell. The present application provides a solid gas generator for cold missile launching, which can reduce the missile launching working time, reduce fluctuation and improve the charge area ratio.

Description

Technical Field

[0001] This invention belongs to the field of gas generators, and relates to a solid gas generator, and more particularly to a solid gas generator for cold ejection. Background Technology

[0002] Missile launch methods can be categorized into hot launch and cold ejection based on their propulsion systems. Hot launch involves the missile using its own engine to generate thrust and leave the launch pad. During launch, a large amount of high-temperature, high-pressure exhaust gas is emitted, which ablates the launch platform and deflector. Cold ejection, on the other hand, relies on external force to launch the missile from the launch tube, eliminating the need to consider the erosion and scouring effects of the exhaust gas on the launch device, or the gas flow handling. Because of its higher safety, adaptability, and reliability, cold ejection is becoming increasingly widespread.

[0003] During the cold launch process, changes in the operating state of the gas generator directly affect the missile's thrust, which in turn affects its acceleration, velocity, and flight trajectory. Specifically, when the gas generator thrust changes too rapidly, the missile experiences excessive instantaneous pressure, and its control system cannot adjust in time to adapt to this rapid change. Simultaneously, the missile's acceleration increases, leading to a rise in velocity and altering its flight trajectory. Conversely, when the gas generator thrust changes too slowly, the missile's exit acceleration decreases, affecting its target arrival time and accuracy. Therefore, the operational stability of the gas generator is crucial for the success of missile launches and for achieving precise strikes.

[0004] Utility model patent CN215057795U discloses a solid gas generator. This utility model patent is a safe, reliable, compact, high-pressure, and fast-response multi-nozzle high-pressure solid gas generator for catapult launches. However, it lacks thermal protection measures, limiting the temperature of the gas generated. Invention patent CN109236497B discloses a lateral force solid gas generator suitable for portable missile control systems. Its propellant charge is fixed in the combustion chamber by an ignition bracket and a baffle plate. However, in this invention patent, the propellant charge is small and does not meet the requirements for dense missile launches. The paper "Design and Simulation of Gas Generator Based on Annular Combustion Chamber Structure" (Modern Defense Technology) (10.3969 / j.issn.1009-086x.2023.05.016) discloses a gas generator with an annular combustion chamber structure. The main structural components include a diffuser, an intake cone, a combustion chamber casing, a swirler, a centrifugal nozzle, and an ignition device. This gas generator can meet the requirements of long-term operation, miniaturization, high efficiency (high-temperature gas source), and fast start-up (high-energy ignition), but it is suitable for aero engines and cannot be used for cold catapults. Summary of the Invention

[0005] In order to solve the above-mentioned technical problems in the background art, the present invention provides a solid gas generator for cold ejection that can reduce missile ejection working time, reduce fluctuation amount, and improve the charge surface ratio.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A solid gas generator for cold ejection is characterized in that: the solid gas generator for cold ejection includes a generator housing, an ignition device, and a low-temperature high-pressure mixed working fluid generating assembly; the ignition device is located inside the generator housing; the low-temperature high-pressure mixed working fluid generating assembly is tangentially disposed on the side wall of the generator housing and communicates with the interior of the generator housing.

[0008] Preferably, the low-temperature high-pressure mixed working fluid generating components used in this invention are multiple sets, and the structure of each set of low-temperature high-pressure mixed working fluid generating components is exactly the same; the generator housing is cylindrical in shape; and the axial direction of each set of low-temperature high-pressure mixed working fluid generating components is tangent to the side wall of the generator housing.

[0009] Preferably, the low-temperature high-pressure mixed working fluid generating assembly used in this invention includes a nozzle, a cooler, an adapter, a nozzle clamping screw, and a nut; the adapter is a hollow cylindrical structure; the adapter includes an adapter inlet and an adapter outlet; the cooler is fitted onto the adapter along the axial direction of the adapter by a nut; a cavity is provided between the cooler and the adapter; the cavity is filled with a cooling medium; the nozzle is installed at the adapter inlet of the adapter by a nozzle clamping screw; the adapter is tangentially installed on the side wall of the generator housing; the interior of the generator housing is connected to the adapter outlet of the adapter through the nozzle.

[0010] Preferably, the cooler used in this invention includes a cooler base and a cooler housing; the cooler housing is fitted onto the adapter along the axial direction of the adapter; a cavity is provided between the cooler housing and the adapter; the cooler housing is mounted on the adapter via the cooler base; a nut is fitted onto the outside of the cooler base and pressed against it; an internal guide hole is provided on the side wall of the adapter; a guide hole and a water spray hole are provided on the cooler housing; a diaphragm is provided on the guide hole; the diaphragm is mounted on the guide hole by a retaining spring; a sealing film is provided on the water spray hole; the spray pipe communicates with the adapter outlet through the adapter inlet; the spray pipe communicates with the adapter outlet through the internal guide hole, the diaphragm, the guide hole, the sealing film, and the water spray hole.

[0011] Preferably, the ignition device used in this invention includes an ignition assembly and a gas generator assembly connected to the ignition assembly.

[0012] Preferably, the gas generating agent assembly used in this invention includes a charging bracket, gas generating agent pellets, and a support rod; the charging bracket is generally sheet-like; the charging bracket includes a top charging bracket and a bottom charging bracket; the structure of the top charging bracket is exactly the same as that of the bottom charging bracket; the top charging bracket is connected to the bottom charging bracket via the support rod and forms a frame structure; the gas generating agent pellets are in multiple sets, and the multiple sets of gas generating agent pellets are arranged parallel to each other along the axial direction of the frame structure; the ignition assembly is connected to the gas generating agent pellets; a first fixing screw is provided at the bottom of the bottom charging bracket; the bottom charging bracket is fixed inside the generator housing by the first fixing screw.

[0013] Preferably, the propellant support used in this invention is provided with annular positioning recesses; there are multiple annular positioning recesses, which are evenly distributed on the propellant support; the number of annular positioning recesses is the same as the number of gas generating agent columns; the gas generating agent columns are embedded in the annular positioning recesses; the annular positioning recesses are provided with support openings that penetrate the propellant support along the thickness direction of the propellant support; the ignition assembly is connected to the gas generating agent columns through the support openings.

[0014] Preferably, the ignition assembly used in this invention includes an ignition box and an ignition disc placed inside the ignition box; a through hole is provided on the side wall of the ignition box; the ignition disc is connected to the propellant column through the through hole and the bracket opening; a boss is provided on the top of the ignition box; the ignition box is fixedly installed in the generator housing by the boss.

[0015] Preferably, the generator housing used in this invention includes an end cap and a base threadedly connected to the end cap; the base is integrally U-shaped; the ignition cartridge is fixedly mounted on the end cap by a boss; the bottom charge support is fixed in the U-shaped cavity of the base by a first fixing screw; threaded mounting holes are provided on the side wall of the base; the low-temperature high-pressure mixed working fluid generating assembly is tangentially mounted on the side wall of the generator housing through the threaded mounting holes; and external threads are provided at the bottom of the base.

[0016] Preferably, the end cap used in this invention includes a cover plate body, a first extension section, and a second extension section; the first extension section is generally annular and is fixedly disposed at the bottom of the cover plate body; the second extension section is generally annular and is fixedly disposed at the top of the cover plate body; the first extension section is threadedly connected to the base; the ignition powder box is fixedly disposed at the bottom of the cover plate body by a boss.

[0017] The beneficial effects of this invention are:

[0018] This invention provides a solid fuel generator for cold ejection, comprising a generator housing, an ignition device, and a low-temperature, high-pressure mixed working fluid generating assembly. The ignition device is located inside the generator housing. The low-temperature, high-pressure mixed working fluid generating assembly is tangentially disposed on the side wall of the generator housing and communicates with the interior of the generator housing. This invention primarily supplements a gas power source with a cooler system. During ejection, the gas generated by the gas generator mixes with the coolant to form a mixed working fluid that propels the isolator. The coolant absorbs heat during vaporization, thereby significantly reducing the temperature of the mixed working fluid, improving the working environment of the ejection tube, and lowering the requirements for the thermal protection of the isolator. This invention employs multiple tubular propellant grains with internally burning surfaces as the propellant type for the gas generator. This propellant type has the advantages of a large combustion area and a high surface area ratio during combustion. On the one hand, it allows the gas to fully contact oxygen during combustion, thereby improving combustion efficiency and generating sufficient gas flow to propel the missile. On the other hand, the surface area-enhancing combustion method with internal combustion ensures a stable pressure curve in the combustion chamber, i.e., stable thrust, which improves pressurization efficiency and allows for a rapid and uniform increase in pressure within the launch tube, thus facilitating the missile's successful launch. This invention uses multiple nozzles evenly distributed on the annular outer wall. The nozzles are fixed to mounting holes by nozzle screws, with internal threads corresponding to the external threads of the nozzle screws. By evenly distributing the nozzles on the annular outer wall, the working propellant generated in the combustion chamber can be effectively discharged to the launch tube area. This layout makes the gas generator structure more compact, thereby reducing the overall size and weight. The 45° clockwise rotation of the nozzles allows for thorough mixing of the gas swirl with air, reducing the gas temperature and creating a uniform flow field distribution, thus improving the operational stability of the gas generator. Traditional gas generators typically require long combustion chambers to ensure thorough mixing and cooling of the gas. The multi-nozzle design of this invention allows for faster gas exhaust from the combustion chamber, significantly shortening its length. Furthermore, because the lateral nozzles are evenly distributed on the annular outer wall, the exhaust gas is more evenly distributed throughout the launch tube area, avoiding direct contact with the missile body and reducing thermal damage, thus improving the stability and reliability of the ejection process. The multi-nozzle design also allows for faster gas exhaust from the combustion chamber, reducing its residence time. This helps lower the pressure within the combustion chamber, thereby improving combustion efficiency. The high-temperature, high-pressure gas generated during operation is ejected from the nozzles and exchanges heat with cooling water in the cooler, producing a lower-pressure and higher-temperature gas-vapor mixture. This mixture expands and performs work within the ejection tube, driving the isolator to ensure safe missile ejection. This not only optimizes the ignition and combustion process of the gas generator, ensuring rapid and uniform combustion, but also reduces the need for thermal protection of the isolator through efficient heat exchange, improving the working environment. At the same time, ease of maintenance was also taken into consideration, which improved the safety and reliability of the device.In summary, the solid gas generator for cold ejection provided by this invention has advantages such as compact structure, shortened combustion chamber length, improved flow field uniformity, and improved combustion efficiency. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the solid gas generator for cold ejection provided by the present invention;

[0020] Figure 2 This is a top view of the solid gas generator (excluding end caps) for cold ejection provided by the present invention.

[0021] Figure 3 This is a top view of the solid gas generator (including end cap) for cold ejection provided by the present invention;

[0022] Figure 4 This is a three-dimensional structural schematic diagram of the solid gas generator for cold ejection provided by the present invention;

[0023] Figure 5 This is a schematic diagram of the end cap structure used in this invention;

[0024] Figure 6 This is a schematic diagram of the structure of the ignition assembly used in this invention;

[0025] Figure 7 This is a schematic diagram of the base used in this invention;

[0026] Figure 8 This is a schematic diagram of the structure of the gas generator assembly used in this invention;

[0027] Figure 9 This is a schematic diagram of the structure of the drug loading support used in this invention;

[0028] Figure 10 This is a schematic diagram of the low-temperature, high-pressure mixed working fluid generating component used in this invention;

[0029] Figure 11 This is a cross-sectional view of the adapter used in this invention;

[0030] Figure 12 This is a schematic diagram of the cooler used in this invention.

[0031] in:

[0032] 1-End cap; 11-First extension section; 12-Cover plate body; 13-Second extension section; 2-Ignition assembly; 20-Ignition disc; 21-Ignition powder box; 22-Boss; 23-Through hole; 3-Base; 33-Cylindrical groove; 34-Internal thread; 35-Threaded mounting hole; 36-External thread; 4-Gas generator assembly; 41-Powder holder; 411-Bearing opening; 412-First fixing screw; 42-Gas generator powder column; 43-Support rod; 431 - Second fixing screw; 44- Annular positioning recess; 5- Low temperature and high pressure mixed working fluid generating component; 51- Nozzle; 52- Cooler; 521- Cooler seat; 522- Flow guide hole; 523- Diaphragm; 524- Snap ring; 525- Adapter housing; 526- Water spray hole; 527- Sealing membrane; 528- Cooler housing; 53- Adapter; 531- Thread; 533- Internal flow guide hole; 534- Fixing groove; 54- Nozzle clamping screw; 55- Nut. Detailed Implementation

[0033] See Figure 1 , Figure 2 , Figure 3 as well as Figure 4 The present invention provides a solid gas generator for cold ejection, including a generator housing, an ignition device, and a low-temperature high-pressure mixed working fluid generating assembly 5; the ignition device is placed inside the generator housing; the low-temperature high-pressure mixed working fluid generating assembly 5 is tangentially disposed on the side wall of the generator housing and communicates with the inside of the generator housing.

[0034] Among them, see Figure 2 , Figure 3 , Figure 4 as well as Figure 7 The low-temperature high-pressure mixed working fluid generating components 5 used in this invention are multiple sets, and each set of low-temperature high-pressure mixed working fluid generating components 5 has the same structure; the generator housing is cylindrical in shape; the axial direction of each set of low-temperature high-pressure mixed working fluid generating components 5 is tangent to the side wall of the generator housing. For example, the tangency can be at an angle of 45°, that is, multiple nozzles with clockwise rotating annular outer wall can be evenly distributed.

[0035] See Figure 10 The low-temperature, high-pressure mixed working fluid generating assembly 5 used in this invention includes a nozzle 51, a cooler 52, an adapter 53, a nozzle clamping screw 54, and a nut 55; see also Figure 12The adapter 53 is a hollow cylindrical structure, including an adapter inlet and an adapter outlet. The cooler 52 is axially mounted on the adapter 53 via a nut 55. A cavity exists between the cooler 52 and the adapter 53, filled with a cooling medium, such as cooling water. The nozzle 51 is positioned at the adapter inlet of the adapter 53 via a nozzle clamping screw 54. The adapter 53 is tangentially mounted on the side wall of the generator housing. The generator housing is connected to the adapter outlet of the adapter 53 via the nozzle 51. The cryogenic high-pressure mixed working fluid generating assembly 5 is evenly fixed to the side of the base 3 via clamping screws 54, and externally fitted with nuts 55 to apply pre-tightening force to the cryogenic high-pressure mixed working fluid generating assembly and simultaneously seal the gas generator housing. Variable, four threaded mounting holes 35 are used to fix nozzles 51 with different throat diameters to meet different ejection technical requirements. The throat liner of nozzle 51 uses carbon / carbon composite material, which is composed of carbon fiber as reinforcement and deposited carbon as matrix. It has good resistance to ablation, thermal shock and mechanical impact. The convergent and divergent sections adopt a high-silica / phenolic and carbon / phenolic composite molding structure. The thermal protection material is high-silica / phenolic resin, which has low density and thermal conductivity, excellent heat absorption capacity, ablation resistance and thermal stability. It is also inexpensive and has excellent high-temperature performance.

[0036] See Figure 11 The adapter 53 used in this invention includes a cooler seat 521 and an adapter housing 525; the adapter housing 525 is fitted onto the adapter 53 along the axial direction of the adapter 53; a cavity is provided between the cooler housing 528 and the adapter 53; the cooler housing 528 is mounted on the adapter 53 through the cooler seat 521; a nut 55 is fitted onto the outside of the cooler seat 521 and pressed onto the cooler seat 521; an internal guide hole 533 is provided on the side wall of the adapter 53; in addition, the adapter 53 also includes a thread 531, a nut 532 and a fixing groove 534, wherein the fixing groove 534 is used to fix the cooler housing 528, and the internal guide hole 533 is aligned with the guide hole 522 for the inlet and outlet of water in the cooler 52.

[0037] See Figure 12The cooler housing 528 is provided with guide holes 522 and spray holes 526; a diaphragm 523 is provided on the guide holes 522; the diaphragm 523 is mounted on the guide holes 522 by a retaining spring 524; a sealing membrane 527 is provided on the spray holes 526; the spray pipe 51 is connected to the outlet of the adapter seat through the inlet of the adapter seat; the spray pipe 51 is connected to the outlet of the adapter seat through the internal guide holes 533, the diaphragm 523, the guide holes 522, the sealing membrane 527, and the spray holes 526. O-rings are provided between the cooler base 521 and the cooler housing 525, and between the cooler base 521 and the base 3. For example, there are 10 guide holes 522, the diaphragm 523 is used to seal the water in the chamber, and the retaining spring 524 is used to install and fix the diaphragm 523.

[0038] The cooling principle of this invention is as follows: The low-temperature, high-pressure mixed working fluid generating component 5 is fixed in the threaded mounting hole 35 by the nozzle screw 54, and a cooler 52 is provided externally; the nozzle 51 is a Laval nozzle. The high-temperature, high-pressure, and high-speed gas generated by the combustion of the propellant column 4 flows through the nozzle 51 and enters the cooler 52. A portion of the high-temperature, high-pressure gas flows into the guide hole 522, ruptures the diaphragm 523, and squeezes the cooling water in the cooler 52. When the cooling water pressure reaches a critical value, it ruptures the sealing film 527 and is sprayed out in the spray hole 526 as small water droplets, mixing with the gas. During the process of being heated and vaporized by the high-temperature gas, the water droplets absorb a large amount of heat from the high-temperature gas, thus cooling the high-temperature gas. The mixed working fluid composed of gas, water vapor, and air propels the missile with a stable acceleration inside the launch tube, thereby causing it to eject from the launch tube at a predetermined speed. During ejection, the gas generated by the gas generator mixes with the coolant to form a working fluid that propels the isolator. The coolant absorbs heat during vaporization, significantly lowering the temperature of the working fluid mixture, improving the ejection tube's working environment, and reducing the thermal protection requirements for the isolator. This invention uses multiple tubular propellant grains with internally burning surfaces as the propellant type for the gas generator. This propellant type has the advantages of a large combustion area and high surface area ratio during combustion. On the one hand, it allows the gas to fully contact oxygen during combustion, thereby improving combustion efficiency and generating sufficient gas pressure and temperature to propel the missile. On the other hand, the surface area-enhancing combustion method with internal combustion ensures a stable pressure curve in the combustion chamber, i.e., stable thrust, which improves pressurization efficiency and allows for a rapid and uniform increase in pressure within the ejection tube, thus facilitating the missile's successful ejection. The gas generator of this invention employs multiple nozzles evenly distributed on an annular outer wall. The nozzles are fixed to mounting holes by nozzle screws, with internal threads corresponding to the external threads of the nozzle screws. By evenly distributing the nozzles on the annular outer wall, the working fluid generated in the combustion chamber can be effectively discharged into the launch tube area. This layout makes the gas generator more compact, thus reducing its overall size and weight. The 45° clockwise rotation of the nozzle arrangement allows the gas swirl to mix thoroughly with the air, reducing the gas temperature and creating a uniform flow field distribution, thereby improving the operational stability of the gas generator.

[0039] The ignition device includes an ignition assembly 2 and a gas generating agent assembly 4 connected to the ignition assembly 2. See also... Figure 8 as well as Figure 9The propellant generator assembly 4 provided by this invention includes a propellant holder 41, propellant pellets 42, and a support rod 43. The propellant holder 41 has an overall sheet-like structure and includes a top-level propellant holder and a bottom-level propellant holder. The structure of the top-level propellant holder is exactly the same as that of the bottom-level propellant holder. The top-level propellant holder is connected to the bottom-level propellant holder through the support rod 43 and forms a frame structure. There are multiple sets of propellant pellets 42, which are arranged parallel to each other along the axial direction of the frame structure. The ignition assembly 2 is connected to the propellant pellets 42. A first fixing screw 412 is provided at the bottom of the bottom-level propellant holder. The bottom-level propellant holder is fixed inside the generator housing by the first fixing screw 412. For example, the support rod 43 passes through the bracket openings 411 on the propellant holders at both ends of the propellant pellet 4. By tightening the support rod 43, the propellant holders on both sides can be squeezed, thereby pressing the propellant pellet. Several annular positioning recesses 44 are evenly distributed on the end face of the propellant holder for positioning the propellant pellet 4. The drug loading bracket 41 is mainly installed and connected by the second fixing screw 431 and the support rod 43.

[0040] The propellant support 41 is provided with annular positioning recesses 44; there are multiple annular positioning recesses 44, which are evenly distributed on the propellant support 41; the number of annular positioning recesses 44 is the same as the number of gas generating agent columns 42; the gas generating agent columns 42 are embedded in the annular positioning recesses 44; the annular positioning recesses 44 are provided with support openings 411 that penetrate the propellant support 41 along the thickness direction of the propellant support 41; the ignition assembly 2 is connected to the gas generating agent columns 42 through the support openings 411. The outer wall and end face of the gas generating agent column 42 are covered with a flame-retardant layer, and the position of the inner hole corresponds to the vent hole 411 provided on the end face of the propellant support 41; the column adopts an enlarged combustion method. For example, there are 19 gas generating agent columns 42 in total, all of which adopt the enlarged combustion method, and the outer wall and end face are covered with a flame-retardant layer.

[0041] See Figure 6The ignition assembly 2 used in this invention includes an ignition cartridge 21 and an ignition disc 20 placed inside the ignition cartridge 21. Through holes 23 are provided on the end face and side walls of the ignition cartridge 21. The ignition disc 20 is connected to the propellant column 42 through the through holes 23 and the bracket opening 411. A boss 22 is provided on the top of the ignition cartridge 21. The ignition cartridge 21 is fixedly installed in the generator housing by the boss 22. For example, the ignition cartridge 21 is a cylindrical cavity with a boss 22 at one end. When the ignition disc is ignited, the generated high-temperature gas can be quickly transferred to the propellant column, achieving rapid ignition. Multiple through holes on the end face and side walls of the ignition cartridge allow for a more uniform distribution of the heat released after ignition, thereby promoting uniform combustion of the propellant column. This design meets the requirements of a compact gas generator structure, reducing the overall size and weight. Furthermore, the threaded connection between the ignition cartridge and the end cap ensures secure installation and easy disassembly and assembly. When the ignition disc 20 inside the ignition cartridge 21 is ignited, the combustion gases enter the generator housing through the through-hole 23, releasing heat to ignite the propellant grain 42. The ignition disc 20 can use large-particle black powder. At launch, the launch control console activates the ignition circuit, igniting the ignition disc 20 sealed inside the ignition cartridge 21. As the ignition disc 20 burns, it generates high-temperature gases that ignite the propellant grain 42 inside the generator.

[0042] See Figure 4 , Figure 5 as well as Figure 7 The generator housing provided by the present invention includes an end cap 1 and a base 3 threadedly connected to the end cap 1; the base 3 is U-shaped in shape; the ignition cartridge 21 is fixedly mounted on the end cap 1 by a boss 22; the bottom charge support is fixed in the U-shaped cavity of the base 3 by a first fixing screw 412; threaded mounting holes 35 are provided on the side wall of the base 3; the low-temperature high-pressure mixed working fluid generating assembly 5 is tangentially mounted on the side wall of the generator housing through the threaded mounting holes 35; and the bottom of the base 3 is provided with an external thread 36. For example, the base 3 has uniformly distributed cylindrical grooves 33 inside, four uniformly distributed threaded mounting holes 35 on the annular outer wall for nozzle mounting, and an internal thread 34 on the top side. The distribution positions of the grooves 33 correspond to the first fixing screws 412 on the charge support 41, and the grooves 33 have threaded holes that connect to the first fixing screws 412 to install the charge support 41. The threaded mounting hole 35 has an internal thread that corresponds to the external thread of the nozzle pressure screw 54. The internal thread 34 is connected to the first extension section 11 at the lower part of the end cover 1. The gas generator can be fixedly installed at the bottom of the launch tube via the circumferential external thread 36 of the base 3, and is aligned with the axis of the launch tube. Optionally, the top of the gas generator base 3 has a pre-drilled thread 34 for connection with the end cover 1. After removing the top cover 1, different propellant charge 42s and charge holders 41 can be replaced.

[0043] Please continue reading Figure 5 The end cap 1 used in this invention includes a cover plate body 12, a first extension section 11, and a second extension section 13. The first extension section 11 is generally annular and is fixedly disposed at the bottom of the cover plate body 12. The first extension section 11 is provided with threads to limit the lateral displacement of the end cap 1 and to play a limiting role. The second extension section 13 is generally annular and is fixedly disposed at the top of the cover plate body 12. The first extension section 11 is threadedly connected to the base 3 to play a fixing and sealing role. The ignition powder box 21 is fixedly disposed at the bottom of the cover plate body 12 by a boss 22.

Claims

1. A solid fuel generator for cold ejection, characterized in that: The solid gas generator for cold ejection includes a generator housing, an ignition device, and a low-temperature, high-pressure mixed working fluid generating assembly (5); the ignition device is located inside the generator housing; the low-temperature, high-pressure mixed working fluid generating assembly (5) is tangentially arranged on the side wall of the generator housing and communicates with the inside of the generator housing; there are multiple sets of low-temperature, high-pressure mixed working fluid generating assemblies (5), and the structure of each set of low-temperature, high-pressure mixed working fluid generating assemblies (5) is exactly the same; the generator housing is cylindrical in shape; the axial direction of each set of low-temperature, high-pressure mixed working fluid generating assemblies (5) is tangent to the side wall of the generator housing; The low-temperature high-pressure mixed working fluid generating assembly (5) includes a nozzle (51), a cooler (52), an adapter (53), a nozzle clamping screw (54), and a nut (55); the adapter (53) is a hollow cylindrical structure; the adapter (53) includes an adapter inlet and an adapter outlet; the cooler (52) is mounted on the adapter (53) along the axial direction of the adapter (53) by the nut (55); a cavity is provided between the cooler (52) and the adapter (53); the cavity is filled with a cooling medium; the nozzle (51) is set at the adapter inlet of the adapter (53) by the nozzle clamping screw (54); the adapter (53) is tangentially set on the side wall of the generator housing; the inside of the generator housing is connected to the adapter outlet of the adapter (53) through the nozzle (51).

2. The solid fuel generator for cold catapult launch according to claim 1, characterized in that: The cooler (52) includes a cooler base (521) and a cooler housing (525); the cooler housing (525) is fitted onto the adapter (53) along the axial direction of the adapter (53); a cavity is provided between the cooler housing (525) and the adapter (53); the cooler housing (525) is mounted on the adapter (53) via the cooler base (521); the nut (55) is fitted onto the outside of the cooler base (521) and pressed onto the cooler base (521); an internal guide hole (533) is provided on the side wall of the adapter (53); the cooler The housing (525) is provided with a flow guide hole (522) and a water spray hole (526); a diaphragm (523) is provided on the flow guide hole (522); the diaphragm (523) is set on the flow guide hole (522) by a retaining ring (524); a sealing film (527) is provided on the water spray hole (526); the nozzle (51) is connected to the outlet of the adapter through the inlet of the adapter; the nozzle (51) is connected to the outlet of the adapter through the internal flow guide hole (533), the diaphragm (523), the flow guide hole (522), the sealing film (527) and the water spray hole (526).

3. The solid fuel generator for cold catapult launch according to claim 1 or 2, characterized in that: The ignition device includes an ignition assembly (2) and a gas generator assembly (4) connected to the ignition assembly (2).

4. The solid fuel generator for cold catapult launch according to claim 3, characterized in that: The gas generating agent assembly (4) includes a charging bracket (41), gas generating agent columns (42), and a support rod (43); the charging bracket (41) is generally in the form of a sheet structure; the charging bracket (41) includes a top charging bracket and a bottom charging bracket; the structure of the top charging bracket is exactly the same as that of the bottom charging bracket; the top charging bracket is connected to the bottom charging bracket through the support rod (43) and forms a frame structure; the gas generating agent columns (42) are in multiple sets, and the multiple sets of gas generating agent columns (42) are arranged in parallel along the axial direction of the frame structure in the frame structure; the ignition assembly (2) is connected to the gas generating agent columns (42); the bottom of the bottom charging bracket is provided with a first fixing screw (412); the bottom charging bracket is fixed inside the generator housing by the first fixing screw (412).

5. The solid fuel generator for cold catapult launch according to claim 4, characterized in that: The propellant support (41) is provided with an annular positioning recess (44); there are multiple annular positioning recesses (44), which are evenly distributed on the propellant support (41); the number of annular positioning recesses (44) is the same as the number of gas generating agent columns (42); the gas generating agent columns (42) are embedded in the annular positioning recesses (44); the annular positioning recesses (44) are provided with a support opening (411) that penetrates the propellant support (41) along the thickness direction of the propellant support (41); the ignition assembly (2) is connected to the gas generating agent column (42) through the support opening (411).

6. The solid fuel generator for cold catapult launch according to claim 5, characterized in that: The ignition assembly (2) includes an ignition cartridge (21) and an ignition disc (20) placed inside the ignition cartridge (21); the side wall and / or end of the ignition cartridge (21) are provided with through holes (23); the ignition disc (20) is connected to the gas generator propellant column (42) through the through holes (23) and the bracket opening (411); the top of the ignition cartridge (21) is provided with a boss (22); the ignition cartridge (21) is fixedly installed in the generator housing by the boss (22).

7. The solid gas generator for cold catapult launch according to claim 6, characterized in that: The generator housing includes an end cap (1) and a base (3) threadedly connected to the end cap (1); the base (3) is U-shaped in whole; the ignition box (21) is fixedly mounted on the end cap (1) by a boss (22); the bottom loading bracket is fixed in the U-shaped cavity of the base (3) by a first fixing screw (412); the side wall of the base (3) is provided with a threaded mounting hole (35); the low temperature high pressure mixed working fluid generating component (5) is tangentially mounted on the side wall of the generator housing through the threaded mounting hole (35); the bottom of the base (3) is provided with an external thread (36).

8. The solid gas generator for cold catapult launch according to claim 7, characterized in that: The end cap (1) includes a cover plate body (12), a first extension section (11) and a second extension section (13); the first extension section (11) is generally annular and is fixedly disposed at the bottom of the cover plate body (12); the second extension section (13) is generally annular and is fixedly disposed at the top of the cover plate body (12); the first extension section (11) is threadedly connected to the base (3); the ignition powder box (21) is fixedly disposed at the bottom of the cover plate body (12) by a boss (22).

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