A series variable parameter fuel-rich gas generation device based on solid energetic charge

Abstract

The present invention relates to a series variable parameter fuel-rich gas generating device based on solid energetic charge, comprising: a first gas generator, a second gas generator, a gas collection injection structure, and a flow regulating device; the second gas generator and the gas collection injection structure are coaxially arranged; the gas collection injection structure comprises: a central connecting pipe, a conical distribution member; the conical distribution member is connected to one end of the central connecting pipe, and the hollow distribution cavity of the conical distribution member is connected to the hollow part of the central connecting pipe; a plurality of output holes are arranged at equal intervals on the circumferential side wall of the large diameter end of the conical distribution member; the other end of the central connecting pipe is connected to the second gas generator. The primary fuel-rich gas generated by the first gas generator of the present invention can flush and ablate the solid energetic charge in the second gas generator, so that the process of cracking and generating secondary fuel-rich gas in the second gas generator is decoupled, reducing the design difficulty of the working conditions and structure of the gas generator.

Description

Technical Field

[0001] The invention relates to the technical field of gas generators, and in particular to a series variable-parameter fuel-rich gas generating device based on solid energetic charge. Background Art

[0002] Solid rocket ramjet is a new type of power system for air-breathing high-speed aircraft. Among them, the solid gas generator is an important component of the solid rocket ramjet engine, which has the advantages of continuous and stable combustion after one ignition. The propellant in the solid gas generator is generally an oxygen-poor solid propellant. The oxygen-poor solid propellant produces a primary fuel-rich gas through self-sustaining combustion in the gas generator; then, the primary fuel-rich gas enters the combustion chamber through the nozzle, and is mixed and burned with the air flow compressed through the inlet duct to further release energy; finally, the combustion products are accelerated and discharged through the tail nozzle to generate thrust. As the energy source of the solid rocket ramjet engine, the oxygen-poor solid propellant usually has an oxidant content of more than 30%, and the component characteristics directly affect the specific impulse performance of the engine. In order to further improve the energy characteristics of the oxygen-poor solid propellant in the gas generator and achieve a higher energy specific impulse, the existing technologies mainly include the improvement of the formula of the oxygen-poor solid propellant, the segmented dual-combustion chamber solid fuel ramjet engine scheme, and the common cabin scheme of placing solid energetic grains in the gas generator.

[0003] In the improvement of the formula of oxygen-depleted solid propellant, its energy density is mainly limited by the content ratio of metal powder and oxidizer. Currently, increasing the boron powder content is usually used to improve the propellant energy density, but the increase in boron powder content is limited. At the same time, the oxidizer content cannot be further reduced because when the oxidizer content value drops to a certain critical point, the propellant will not be able to achieve self-sustaining combustion.

[0004] The segmented dual-combustion chamber solid fuel ramjet engine scheme uses a solid propellant with an inner wall paste in the subsonic combustion chamber. Since the propellant does not need to sustain combustion, the main component of the propellant does not contain an oxidizer or contains very little oxidizer. However, due to the recession of the solid propellant combustion surface during the combustion process, the internal surface of the engine changes greatly, and there are problems such as large total pressure loss of the air flow, complex structure, and difficult flow adjustment. Therefore, it has little engineering practical significance.

[0005] The gas generator that adopts the co-chamber scheme of oxygen-depleted solid propellant and solid energetic grain can improve the energy density of the overall fuel. However, during the operation of the gas generator that adopts the co-chamber scheme, the solid energetic grain absorbs heat and decomposes to produce a large amount of low-molecular products, which directly affects the temperature and pressure inside the gas generator, and brings more coupled uncontrollable factors to the stable and controllable combustion of the oxygen-depleted solid propellant in the gas generator. At the same time, the problem of solid energetic grain blockage and clogging the throat may occur, making it difficult to achieve stable operation of the engine. Summary of the invention

[0006] The object of the present invention is to provide a series variable parameter fuel-rich combustion gas generating device based on solid energetic charge to solve the problem of low specific impulse of oxygen-depleted solid propellant fuel of existing solid rocket ramjet engines.

[0007] To achieve the above-mentioned object of the invention, the present invention provides a series variable parameter fuel-rich gas generating device based on solid energetic charge, comprising: a first gas generator, a second gas generator and a gas collection injection structure arranged in series, a flow regulating device arranged on the first gas generator, an oxygen-depleted solid charge arranged in the first gas generator, and a solid energetic charge arranged in the second gas generator;

[0008] A first through hole is provided at one end of the first gas generator connected to the second gas generator;

[0009] The second gas generator and the gas collection and injection structure are coaxially arranged;

[0010] The gas collection and injection structure comprises: a central connecting pipe, a conical distribution member having a hollow distribution cavity;

[0011] The tip of the conical distribution member is connected to one end of the central connecting pipe, and the hollow distribution cavity of the conical distribution member is connected to the hollow part of the central connecting pipe;

[0012] A plurality of output holes communicating with the hollow distribution cavity are evenly spaced on the circumferential side wall of the large diameter end of the conical distribution member;

[0013] The other end of the central connecting pipe is connected to the second gas generator;

[0014] The flow regulating device comprises: a positioning sleeve, a rotating shaft installed in the positioning sleeve, and a slide valve and a servo drive respectively arranged at opposite ends of the rotating shaft;

[0015] The rotating shaft is rollingly connected with the positioning sleeve;

[0016] The slide valve is provided with an adjustment hole penetrating through its body;

[0017] The servo drive controls the swing of the slide valve based on the rotating shaft, so as to adjust the relative position between the regulating hole and the first through hole, so as to control the opening of the first through hole;

[0018] The slide valve comprises: a long strip-shaped slide valve body, and a supporting roller connected to the slide valve body;

[0019] One end of the sliding valve body is connected to the rotating shaft, and the supporting roller is arranged at the other end of the sliding valve body;

[0020] The supporting roller is in rolling contact with the first gas generator.

[0021] According to one aspect of the present invention, the first gas generator comprises: a hollow first shell, a first heat insulating structure arranged inside the first shell, an ignition device, a delivery pipe, a temperature sensor and a pressure sensor;

[0022] The first heat insulation structure is a hollow structure;

[0023] The flow regulating device and the delivery pipe are arranged side by side at the front end of the first shell, wherein the first through hole is located at a position where the delivery pipe is connected to the first shell;

[0024] On the circumferential side surface of the first gas generator, the temperature sensor, the ignition device and the pressure sensor are arranged in sequence and spaced apart;

[0025] The temperature sensor, the ignition device and the pressure sensor are arranged near the front end of the first gas generator and extend into the first heat insulation structure respectively.

[0026] According to one aspect of the present invention, the first shell comprises: a first hollow cylinder with one end open and the other end closed, and a first end cover detachably connected to the open end of the first hollow cylinder;

[0027] The first end cover is provided with a first positioning hole and a second positioning hole;

[0028] The first positioning hole is coaxially arranged with the delivery pipe, and the delivery pipe is detachably connected to the first end cover;

[0029] The flow regulating device is coaxially arranged with the second positioning hole, and the flow regulating device is detachably connected with the first end cover;

[0030] The first heat-insulating structure comprises: a first heat-insulating cylinder with one end open and the other end closed, a first heat-insulating end cover detachably connected to the open end of the first heat-insulating cylinder, and a guide plate detachably mounted on the inner side of the first heat-insulating end cover;

[0031] A hollow cavity is formed between the guide plate and the first heat-insulating end cover;

[0032] The guide plate is provided with a guide hole, and the guide hole is coaxially arranged with the delivery pipe;

[0033] The first through hole passes through the first heat-insulating end cover, and the first heat-insulating end cover is also provided with a second through hole passing through;

[0034] The first via hole and the first positioning hole are arranged coaxially;

[0035] The second via hole is coaxially arranged with the second positioning hole.

[0036] According to one aspect of the present invention, a sealing ring is provided between the rotating shaft and the positioning sleeve;

[0037] The slide valve is located in a hollow cavity formed by the guide plate and the first heat-insulating end cover;

[0038] The supporting roller is in rolling contact with the first heat insulating end cover.

[0039] According to one aspect of the present invention, a rolling support plate for supporting the supporting roller is embedded in the inner side surface of the first heat-insulating end cover.

[0040] According to one aspect of the present invention, the second gas generator comprises: a second shell which is hollow and has openings at both ends, a rectifying orifice plate and a drug-blocking orifice plate arranged in the second shell, and a supporting frame arranged between the rectifying orifice plate and the drug-blocking orifice plate;

[0041] The through holes on the rectifying orifice plate are arranged correspondingly to the through holes on the medicine blocking orifice plate;

[0042] The second shell includes: an intermediate cylinder, a first end cap and a second end cap disposed at opposite ends of the intermediate cylinder, a second heat-insulating cylinder connected to the intermediate cylinder, a first heat-insulating end cap connected to the first end cap, a second heat-insulating end cap connected to the second end cap, a transition pipe connected to the second end cap, and a powder flowmeter disposed on the transition pipe;

[0043] The first end cap is provided with a first opening for connecting with the delivery pipe;

[0044] The second end cover is provided with a second opening;

[0045] Along the direction from the first end cap to the second end cap, the rectifying orifice plate and the drug blocking orifice plate are sequentially arranged at intervals;

[0046] The second opening is coaxially connected to one end of the transition pipe, and the other end of the transition pipe is coaxially connected to the central connecting pipe;

[0047] The radial dimensions of the second heads are gradually increased along the direction approaching the middle cylinder;

[0048] The support skeleton is a topological structure, wherein the support skeleton comprises: a plurality of ring structures and at least one connection structure;

[0049] Along the radial direction of the support frame, a plurality of the annular structures are coaxially and oppositely arranged in sequence;

[0050] The connecting structure is used to connect a plurality of the annular structures.

[0051] According to one aspect of the present invention, the cross-sectional shape of the oxygen-depleted solid charge is matched with the cross-sectional shape of the hollow portion of the first thermal insulation structure;

[0052] The solid energetic charge is provided with a plurality of fuel gas passages axially penetrating the body thereof;

[0053] The gas channel is arranged corresponding to the through holes on the medicine-blocking orifice plate and the rectifying orifice plate; wherein the opening area of ​​the through holes on the rectifying orifice plate is larger than the opening area of ​​the gas channel, and the opening area of ​​the through holes on the medicine-blocking orifice plate is smaller than the opening area of ​​the gas channel;

[0054] The supporting framework is embedded in the solid energetic charge column.

[0055] According to one aspect of the present invention, the first heat-insulating cylinder is a phenolic resin cylinder;

[0056] The first thermal insulation end cover, the second thermal insulation cylinder, the first thermal insulation head, and the second thermal insulation head are respectively made of high-silicon oxide materials;

[0057] The guide plate is a carbon-carbon material plate;

[0058] The sliding valve body, the supporting roller, and the rolling supporting plate are respectively made of molybdenum alloy material.

[0059] According to one aspect of the present invention, the solid energetic charge is made of a polymer solid fuel containing high energy powder;

[0060] The supporting frame is made of ablative material.

[0061] The present invention has the following beneficial effects:

[0062] According to one scheme of the present invention, in the series variable parameter rich fuel gas generating device of the present invention, the primary rich fuel gas generated by the first gas generator can flush and ablate the solid energetic charge in the second gas generator, so that the process of cracking in the second gas generator to generate secondary rich fuel gas is decoupled, thereby reducing the working condition and structural design difficulty of the gas generator.

[0063] According to one solution of the present invention, the solution of the present invention reduces the need for modification of the oxygen-depleted solid propellant in the first gas generator, and avoids the combustion instability of the oxygen-depleted solid propellant caused by the decrease in oxidant content.

[0064] According to one solution of the present invention, the solid energetic charge component in the second gas generator of the present invention has a wide range of proportions, which broadens the characteristic parameters of the secondary fuel-rich gas.

[0065] According to one scheme of the present invention, the present invention can, under the premise of not modifying the oxygen-depleted solid propellant in the first gas generator and meeting the engine operating conditions, by adding a second gas generator, under the flushing and heat exchange of the primary rich fuel gas, the solid energetic charge in the second gas generator endothermically decomposes into small molecular hydrocarbon compounds and high-energy powder particles to generate a secondary rich fuel gas with higher combustible components, which can greatly improve the combustion characteristics of the primary rich fuel gas and effectively enhance the engine fuel performance specific impulse.

[0066] According to one scheme of the present invention, the present invention can flexibly adjust the composition ratio of the solid energetic charge in the second gas generator to conveniently enhance the ability to absorb and exchange heat with the primary fuel-rich gas, thereby significantly reducing the outlet temperature of the secondary fuel-rich gas, while increasing the mass proportion of highly active small molecule hydrocarbon compounds, thereby meeting the demand of the solid rocket rotating detonation ramjet engine for low-temperature small molecule hydrocarbon rich gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0067] Figure 1 is a schematic structural principle diagram of a series variable parameter rich fuel gas generating device according to an embodiment of the present invention;

[0068] Figure 2 is a perspective view schematically showing a series variable parameter rich fuel gas generating device according to an embodiment of the present invention;

[0069] Figure 3 is a three-dimensional cross-sectional view schematically showing a series variable parameter rich fuel gas generating device according to an embodiment of the present invention;

[0070] Figure 4 is a perspective view schematically showing a first end cap according to an embodiment of the present invention;

[0071] Figure 5 is a perspective view schematically showing a first thermal insulation end cap according to an embodiment of the present invention;

[0072] Figure 6 is a perspective view schematically showing a guide plate according to an embodiment of the present invention;

[0073] Figure 7 is a perspective view schematically showing a slide valve according to an embodiment of the present invention;

[0074] Figure 8 is a schematic diagram showing an installation structure of a support roller in a slide valve according to an embodiment of the present invention;

[0075] Fig. 9 is a structural diagram schematically showing a support frame according to an embodiment of the present invention;

[0076] Fig.10 is an end view schematically showing a solid energetic charge column according to an embodiment of the present invention;

[0077] Fig.11 FIG. 1 is a schematic end view of a solid energetic charge according to another embodiment of the present invention.

[0078] Description of Reference Numerals

[0079] 1. First gas generator; 2. Second gas generator; 3. Gas collection injection structure; 4. Flow regulating device; 5. Oxygen-depleted solid charge; 6. Solid energetic charge; 31. Central connecting pipe; 32. Conical distribution member; 32a. Output hole; 11. First shell; 12. First thermal insulation structure; 13. Ignition device; 14. Delivery pipe; 15. Temperature sensor; 16. Pressure sensor; 111. First hollow cylinder; 112. First end cover; 112a. First positioning hole; 112b. Second positioning hole; 121. First thermal insulation cylinder; 122. First thermal insulation end cover; 123. Guide plate; 123a. Guide hole; 122a. First through hole; 122b. Second through hole; 122c. Rolling support plate; 41 , positioning sleeve; 42, rotating shaft; 43, sliding valve; 44, servo drive; 421, sealing ring; 431, sliding valve body; 432, supporting roller; 43a, adjusting hole; 21, second shell; 22, rectifying orifice plate; 23, medicine-blocking orifice plate; 24, supporting skeleton; 211, intermediate cylinder; 212, first head; 213, second head; 214, second thermal insulation cylinder; 215, first thermal insulation head; 216, second thermal insulation head; 217, transition pipe; 218, powder flowmeter; 241, annular structure; 242, connecting structure; 61, gas channel; a, engine shell; b, center body; c, series variable parameter rich-fuel gas generating device; d1, isolation section; d2, combustion chamber; d3, nozzle section. DETAILED DESCRIPTION

[0080] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0081] When describing the embodiments of the present invention, the orientation or positional relationship expressed by the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or positional relationship shown in the relevant drawings and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0082] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments cannot be described one by one here, but the embodiments of the present invention are not therefore limited to the following embodiments.

[0083] Combination Figure 1 , Figure 2 and Figure 3 As shown, according to one embodiment of the present invention, the present invention provides a series variable parameter fuel-rich gas generating device based on solid energetic charge, comprising: a first gas generator 1, a second gas generator 2 and a gas collection injection structure 3 arranged in series in sequence, a flow regulating device 4 arranged on the first gas generator 1, an oxygen-depleted solid charge 5 arranged in the first gas generator 1, and a solid energetic charge 6 arranged in the second gas generator 2; in this embodiment, a first through hole 122a is provided at one end of the first gas generator 1 connected to the second gas generator 2, and the second gas generator 2 and the gas collection injection structure 3 are coaxially arranged. In this embodiment, the gas collection injection structure 3 includes: a central connecting pipe 31 and a conical distribution member 32 having a hollow distribution cavity; wherein the tip of the conical distribution member 32 is coaxially connected to one end of the central connecting pipe 31, and the other end is inclined and extends in a direction away from the central connecting pipe 31, and then, the hollow distribution cavity of the conical distribution member 32 is connected to the hollow part of the central connecting pipe 31; in this embodiment, a plurality of output holes 32a connected to the hollow distribution cavity are evenly spaced on the circumferential side wall of the large diameter end of the conical distribution member 32. In this embodiment, the axial direction of the output hole 32a is consistent with the inclination angle of the hollow distribution cavity. Through the above arrangement, the output airflow of the conical distribution member 32 can be output along a fixed direction flow field, so as to facilitate mixing with other airflows and ensure the stability of the output.

[0084] In this embodiment, the cross-sectional area of ​​the hollow distribution cavity of the conical distribution member 32 gradually decreases in the direction away from the central connecting pipe 31, so as to effectively increase the gas flow rate and reduce particle deposition through the guiding effect of the central cone of the conical distribution member 32 and the contraction cross-sectional design of the hollow distribution cavity, thereby effectively ensuring the stable and reliable gas output.

[0085] In this embodiment, the gas collection injection structure 3 is formed by 3D printing, and a high temperature resistant nano ceramic coating is provided on the side surface inside the gas collection injection structure 3, which can reduce roughness and reduce particle clogging. Further, a high temperature resistant nano ceramic coating can be optionally provided on the inner side surface of the output hole 32a to further reduce the roughness of the inner side of the output hole 32a, so as to achieve stable and smooth airflow output, and further reduce particle clogging.

[0086] In this embodiment, the other end of the central connecting pipe 31 is connected to the second gas generator 2 , wherein the central connecting pipe 31 is also coaxial with the second gas generator 2 .

[0087] Through the above configuration, by setting the gas collection injection structure 3, the secondary fuel-rich gas formed can be gathered and evenly distributed in different directions, so as to achieve uniform output of the secondary fuel-rich gas, so that the present invention has better working performance.

[0088] Combination Figure 1 , Figure 2 and Figure 3 As shown, according to an embodiment of the present invention, the first gas generator 1 includes: a hollow first shell 11, a first heat insulation structure 12 arranged on the inner side of the first shell 11, an ignition device 13, a delivery pipe 14, a temperature sensor 15 and a pressure sensor 16; wherein the first heat insulation structure 12 is a hollow structure; in this embodiment, the flow regulating device 4 and the delivery pipe 14 are arranged side by side at the front end of the first shell 11, wherein the first through hole 122a is located at the position where the delivery pipe 14 is connected to the first shell 11, and the flow regulating device 4 is used to control the opening of the first through hole 122a; further, on the circumferential side of the first gas generator 1, the temperature sensor 15, the ignition device 13 and the pressure sensor 16 are arranged in sequence; in this embodiment, the temperature sensor 15, the ignition device 13 and the pressure sensor 16 are arranged close to the front end of the first gas generator 1, and extend into the first heat insulation structure 12 respectively.

[0089] In this embodiment, the ignition device 13 is composed of a shell thread and a central conductive rod, wherein one end of the central conductive rod is connected to the positive and negative voltage lines respectively, and the other end is connected to the ignition head, which is composed of a resistance wire and a high explosive, and explodes when heated. In this embodiment, high-temperature resistant inorganic glue is poured between the shell thread and the central conductive rod of the ignition device 13 for sealing and insulation, so as to effectively ensure the sealing and pressure resistance in a high temperature environment. Through the above-mentioned configuration, based on the ignition device 13, the ignition of the propellant installed in the first thermal insulation structure 12 can be easily realized.

[0090] Combination Figure 2 , Figure 3 and Figure 4As shown, according to one embodiment of the present invention, the first shell 11 includes: a first hollow cylinder 111 with one end open and the other end closed, and a first end cover 112 detachably connected to the open end of the first hollow cylinder 111; wherein an annular flange is provided on the outer side of the open end of the first hollow cylinder 111, and an annular groove is provided on the side of the annular flange, and correspondingly, an annular flange is also provided on the circumference of the first end cover 112, thereby, the first hollow cylinder 111 and the first end cover 112 can be connected by the flanges, and they can be locked based on the threaded connector to realize the construction of the entire first shell 11. In this embodiment, in order to ensure the sealing of the connection position, a sealing connection can be achieved by providing an annular protrusion on the flange of the first end cover 112 to cooperate with the annular flange, and of course, a high temperature resistant sealing ring can also be provided in the annular groove to further improve the sealing of the connection position.

[0091] In this embodiment, the first end cover 112 is provided with a first positioning hole 112a and a second positioning hole 112b; wherein the first positioning hole 112a is coaxially arranged with the delivery pipe 14, and the delivery pipe 14 is detachably connected to the first end cover 112; the flow regulating device 4 is coaxially arranged with the second positioning hole 112b, and the flow regulating device 4 is detachably connected to the first end cover 112.

[0092] Furthermore, an annular protrusion may be further provided on the outer side of the first end cover 112 corresponding to the first positioning hole 112a and the second positioning hole 112b, thereby conveniently providing a threaded hole, and then the delivery pipe 14 and the flow regulating device 4 may be locked on the corresponding annular protrusion through a threaded connector to achieve reliable installation, and further, a sealing structure may be further provided between the connection positions to ensure the sealing of the connection positions, wherein the sealing structure may be provided as a sealing ring, a protrusion groove structure, etc.

[0093] Combination Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, according to an embodiment of the present invention, the first heat insulation structure 12 comprises: a first heat insulation cylinder 121 with one end open and the other end closed, a first heat insulation end cover 122 detachably connected to the open end of the first heat insulation cylinder 121, and a guide plate 123 detachably mounted on the inner side of the first heat insulation end cover 122; in this embodiment, in order to maintain the stability of the installation, the first heat insulation cylinder 121 is nested with the first hollow cylinder 111 in a shape matching arrangement, and the first heat insulation end cover 122 is nested with the first end cover 112 in a shape matching arrangement, thereby, when the first end cover 112 is connected to the first hollow cylinder 111, the first heat insulation cylinder 121 and the first heat insulation end cover 122 can be stably docked. In this embodiment, in order to ensure the sealing of the connection position, an annular protrusion can be further provided on the first heat insulation end cover 122, thereby realizing a corresponding nesting structure at the position where the first heat insulation cylinder 121 and the first heat insulation end cover 122 are opposite to each other, so as to achieve a corresponding sealing effect.

[0094] In the present embodiment, the first heat-insulating cylinder 121 is made of low-cost phenolic resin (Bakelite) to withstand erosion and ablation during the generation of a fuel-rich gas, thereby ensuring the operating performance of the present invention; wherein the thickness of the first heat-insulating cylinder 121 is determined according to the working time of the first gas generator 1, for example, when the working time is greater than 20s, it is recommended that the thickness be set to be greater than or equal to 4mm; in addition, the first heat-insulating end cover 122 is made of a high-silicon oxide material that is resistant to high temperature and erosion, so as to more fully withstand the erosion and ablation during the generation of a fuel-rich gas, thereby ensuring its stability in use.

[0095] Furthermore, the guide plate 123 is connected to the first insulation end cover 122 by a threaded connector, wherein the outer diameter of the guide plate 123 can be nested with the annular protrusion provided on the first insulation end cover 122 to ensure the positioning and installation of the guide plate 123. In addition, to ensure the installation position of the guide plate 123, a limiting step can be provided on the inner side of the first insulation end cover 122, so that the edge of the guide plate 123 can be pressed against the limiting step to form a hollow cavity between the guide plate 123 and the first insulation end cover 122. In this embodiment, in order to facilitate the reliable connection of the threaded connector, the first insulation end cover 122 can be embedded with a metal sleeve to achieve reliable installation of the threaded connector. In this embodiment, in order to ensure the stability of the guide plate 123 in use, it is made of carbon-carbon high temperature resistant and ablation resistant material.

[0096] In this embodiment, the guide plate 123 is provided with a guide hole 123a, and the guide hole is arranged coaxially with the delivery pipe 14; wherein, along the axial direction of the guide hole 123a, chamfered surfaces or rounded surfaces are respectively provided at the opposite ends of the guide hole 123a, thereby achieving a guiding effect on the primary fuel-rich gas, so that its mainstream can be aligned with the corresponding through holes on the first insulation end cover 122, so as to facilitate the stable and smooth passage of the airflow.

[0097] In this embodiment, the first through hole 122a is set through the first insulation end cover 122, and the first insulation end cover 122 is also provided with a second through hole 122b passing therethrough; wherein the first through hole 122a is coaxially connected to the first positioning hole 112a; and the second through hole 122b is coaxially connected to the second positioning hole 112b.

[0098] Combination Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, according to one embodiment of the present invention, the flow regulating device 4 includes: a positioning sleeve 41, a rotating shaft 42 installed in the positioning sleeve 41, a sliding valve 43 and a servo drive 44 respectively arranged at opposite ends of the rotating shaft 42; wherein, the positioning sleeve 41 can be set as a hollow cylindrical structure, and its end adopts a nesting method to achieve positioning installation with the second positioning hole 112b, so as to effectively ensure the hardcover installation of the relative position. In this embodiment, the size of the second positioning hole 112b is larger than the size of the second through hole 122b, so that if there is a gap between the end of the positioning sleeve 41 and the first heat-insulating end cover 122, a heat-insulating ring can be further filled between the gap to ensure the heat insulation of various positions. In this embodiment, the servo drive 44 is a high-precision stepper motor.

[0099] In this embodiment, the rotating shaft 42 is rollingly connected to the positioning sleeve 41, and a sealing ring 421 is arranged between the rotating shaft 42 and the positioning sleeve 41; wherein, one end of the rotating shaft 42 passes through the second positioning hole 112b and the second through hole 122b to extend into the first thermal insulation structure 12, and in addition, the sliding valve 43 is in a hollow cavity formed by the guide plate 123 and the first thermal insulation end cover 122; thereby, a fixed connection with the sliding valve 43 is achieved through the end of the rotating shaft 42, wherein an interference fit is adopted between the connecting position of the rotating shaft 42 and the sliding valve 43, and a threaded connector is adopted for corresponding locking.

[0100] In this embodiment, the rotating shaft 42 includes: a first rotating shaft portion and a second rotating shaft portion arranged coaxially, wherein the diameter of the first rotating shaft portion is smaller than the diameter of the second rotating shaft portion, wherein the end of the first rotating shaft portion is used to achieve a fixed connection with the sliding valve 43, and the second rotating shaft portion is used to achieve a rotational connection with the positioning sleeve 41 and docking with the servo drive 44.

[0101] In this embodiment, rolling bearings are provided at opposite ends of the second rotating shaft portion along the axial direction of the second rotating shaft portion, and the provided rolling bearings are used to realize the rotation connection with the positioning sleeve 41. Furthermore, the sealing ring 421 is sleeved on the outer side of the second rotating shaft portion to realize the dynamic seal between the second rotating shaft portion and the positioning sleeve 41 during the rotation process; wherein, the sealing ring 421 can be a high temperature resistant and wear resistant sealing ring to ensure the reliability of its working performance.

[0102] In this embodiment, the positioning sleeve 41 is made of metal material, so that the heat on the rotating shaft 42 is transferred to the positioning sleeve 41 through contact with the rolling bearing, so as to cool the rotating shaft 42 and improve the operation stability of the rotating shaft 42. In addition, by further adopting a larger second rotating shaft part, it is easier to increase the absorption and conduction of heat to effectively reduce the impact on the servo drive 44. Further, in order to avoid the impact of heat conduction and gas on the servo drive 44, the gap between the rotating shaft 42 and the first end cover 112, the first heat-insulating end cover 122, and the positioning sleeve 41 should be filled with high-temperature resistant silicone grease. In addition, the length of the rotating shaft 42 should be related to the designed working time of the first gas generator 1. If the working time is less than 100s, the maximum length of the rotating shaft 42 is 120mm to ensure sufficient heat sink to reduce the heating rate of the servo drive 44; otherwise, a cooling mechanism can be further designed to achieve the control of temperature.

[0103] In this embodiment, a heat dissipation transition sleeve can be further arranged between the positioning sleeve 41 and the servo drive 44 to achieve a fixed connection between them, wherein the heat dissipation transition sleeve can be nested with the end of the positioning sleeve 41 in a nested manner, and a threaded connector is used to achieve a fixation between them. Correspondingly, the servo drive 44 also uses a threaded connector to achieve a fixed connection with the heat dissipation transition sleeve. In this embodiment, the rolling bearing arranged at the end of the second shaft portion that is connected to the servo drive 44 can be installed in the heat dissipation transition sleeve; further, by setting the heat dissipation transition sleeve to be made of a metal material with high heat transfer and heat dissipation efficiency, such as a copper material, thus, the heat can be further conducted to the heat dissipation transition sleeve by installing the rolling bearing closest to the servo drive 44 with the heat dissipation transition sleeve, so as to achieve a stage barrier in the heat transfer direction, so as to reduce the impact on the servo drive 44; wherein, in order to effectively improve the heat dissipation efficiency of the heat dissipation transition sleeve, the outer surface of the heat dissipation transition sleeve can be further increased to achieve excellent heat dissipation efficiency and capacity, for example, a heat dissipation fin or other structure is provided.

[0104] In this embodiment, the slide valve 43 is provided with an adjustment hole 43a running through its body; wherein, the servo drive 44 controls the swing of the slide valve 43 based on the rotating shaft 42, and is used to adjust the relative position of the adjustment hole 43a and the first through hole 122a to control the opening of the first through hole 122a; specifically, through the transmission instruction of the preset control system to the servo drive 44, the slide valve 43 is rotated by a certain angle to block or increase the opening area of ​​part of the first through hole 122a, thereby changing the pressure in the first gas generator 1, and then changing the propellant burning rate to control the gas flow rate.

[0105] Combination Figure 3 , Figure 5 , Figure 7 and Figure 8 As shown, according to an embodiment of the present invention, the sliding valve 43 includes: a long sliding valve body 431, and a supporting roller 432 connected to the sliding valve body 431; wherein, one end of the sliding valve body 431 is interconnected with the rotating shaft 42, and the supporting roller 432 is arranged at the other end of the sliding valve body 431; in this embodiment, the supporting roller 432 is in rolling contact with the first insulation end cover 122 of the first gas generator 1, so as to effectively reduce the friction when adjusting the position of the sliding valve 43, and effectively improve the service life of the sliding valve 43.

[0106] In this embodiment, the support roller 432 can be embedded in a side of the sliding valve body 431 adjacent to the first insulation end cover 122, wherein the support roller 432 includes: a rotating shaft portion and a wheel body, wherein the interval between the sliding valve body 431 and the first insulation end cover 122 can be adjusted by adjusting the embedding depth of the rotating shaft portion by limiting the rotating shaft portion in the mounting groove of the sliding valve body 431 to facilitate the reliable rotation of the wheel body.

[0107] In this embodiment, a rolling support plate 122c for supporting the support roller 432 is embedded in the inner side surface of the first insulation end cover 122; wherein, a through hole is provided on the rolling support plate 122c to achieve a coaxial arrangement with the first through hole 122a, so as to improve the operational reliability of the support roller 432 and increase the service life of the first insulation end cover 122.

[0108] In this embodiment, the slide valve body 431, the support roller 432, and the rolling support plate 122c are respectively made of molybdenum alloy material. Through the above arrangement, the stability and reliability of the structure operation process are effectively guaranteed.

[0109] According to one embodiment of the present invention, on the sliding valve body 431, a plurality of adjusting holes 43a can be provided, and the apertures of the plurality of adjusting holes 43a can be provided to be different, and the plurality of adjusting holes 43a are regularly arranged along the swing arc direction of the sliding valve body 431, thereby enabling the sliding valve body 431 of the present invention to realize the control of the opening of the first through hole 122a by a single adjusting hole 43a, and to realize reliable limitation of the gas output directly by switching the adjusting holes 43a of different sizes corresponding to the first through hole 122a.

[0110] like Figure 3 As shown, according to one embodiment of the present invention, a heat-insulating tube is nested inside the delivery tube 14 , wherein the heat-insulating tube can be made of high-silicon oxide material to ensure the high-temperature resistance of the delivery tube 14 .

[0111] Combination Figure 1 and Figure 3 As shown, according to an embodiment of the present invention, the second gas generator 2 includes: a second shell 21 which is hollow and opened at both ends, a rectifying orifice plate 22 and a medicine-blocking orifice plate 23 arranged in the second shell 21, and a supporting frame 24 arranged between the rectifying orifice plate 22 and the medicine-blocking orifice plate 23; in this embodiment, the through holes on the rectifying orifice plate 22 are arranged corresponding to the through holes on the medicine-blocking orifice plate 23; wherein the shapes of the through holes on the rectifying orifice plate 22 and the through holes on the medicine-blocking orifice plate 23 can be set to be consistent or different, for example, the shapes of the through holes can be set as circular holes, regular polygonal holes, etc.

[0112] Combination Figure 1 , Figure 2 and Figure 3As shown, according to an embodiment of the present invention, the second shell 21 includes: an intermediate cylinder 211, a first end cap 212 and a second end cap 213 arranged at opposite ends of the intermediate cylinder 211, a second heat-insulating cylinder 214 connected to the intermediate cylinder 211, a first heat-insulating end cap 215 connected to the first end cap 212, a second heat-insulating end cap 216 connected to the second end cap 213, a transition pipe 217 connected to the second end cap 213, and a powder flow meter 218 arranged on the transition pipe 217; wherein the first end cap 212 is provided with a first opening for connecting with the conveying pipe 14; and the second end cap 213 is provided with a second opening. In this embodiment, along the direction from the first end cap 212 to the second end cap 213, the rectifying orifice plate 22 and the medicine blocking orifice plate 23 are arranged in sequence and spaced apart. In this embodiment, the second thermal insulation cylinder 214, the first thermal insulation head 215, and the second thermal insulation head 216 are respectively made of high-silicon material; wherein the second thermal insulation cylinder 214, the first thermal insulation head 215, and the second thermal insulation head 216 are arranged to be butt-jointed with each other.

[0113] In this embodiment, the second opening is coaxially connected to one end of the transition pipe 217, and the other end of the transition pipe 217 is coaxially connected to the central connecting pipe 31; wherein, threaded connectors can be used to achieve mutual fixation, and a sealing structure (such as a sealing ring, a raised groove structure, etc.) can be further arranged between the connection positions.

[0114] In this embodiment, the powder flow meter 218 can be mounted on the outside of the transition pipe 217 to realize the flow of the secondary fuel-rich gas therein; wherein, the powder flow meter 218 adopts the principle of electrostatic induction, and calculates the gas flow by capturing the weak current signal of the charged particles in the secondary fuel-rich gas flow. Furthermore, in order to ensure the stable operation of the transition pipe 217, a transition pipe insulation sleeve can be further nested on the inner side of the transition pipe 217, wherein the transition pipe insulation sleeve can be made of high-silicon oxide material to ensure its thermal insulation performance. In addition, the transition pipe insulation sleeve is connected to the second thermal insulation head 216 to effectively ensure the thermal insulation effect of the connection position.

[0115] Combination Figure 1 , Figure 2 and Figure 3 As shown, according to an embodiment of the present invention, the radial dimensions of the second head 213 are gradually increased along the direction approaching the middle cylinder 211; specifically, the second head 213 is a conical head.

[0116] like Fig. 9As shown, according to an embodiment of the present invention, the support skeleton 24 is a topological structure; wherein the support skeleton 24 includes: a plurality of annular structures 241 and at least one connecting structure 242; in this embodiment, along the radial direction of the support skeleton 24, the plurality of annular structures 241 are sequentially coaxially and directly oppositely arranged; wherein the connecting structure 242 is used to simultaneously connect the plurality of annular structures 241. For example, the support skeleton 24 includes: three annular structures 241 with different radial dimensions, and the annular structures 241 can be set as a circular ring. The connecting structure 242 can be set as a rectangular plate, and the connecting structure 242 is set as four, wherein each connecting structure 242 is respectively connected to the three annular structures 241 at the same time, and the plurality of connecting structures 242 are sequentially arranged at equal intervals along the circumference of the annular structure 241. Of course, the annular structure 241 can also be set as other numbers, such as two, four, etc., and the connecting structure 242 can also be set as other numbers, such as three, five, etc.

[0117] In this embodiment, a plurality of positioning and connecting holes penetrating the main body of the annular structure 241 may be regularly arranged, and the drug column may be reliably fixed through the arranged positioning and connecting holes, so as to effectively improve the structural stability of the entire drug column.

[0118] Combination Figure 1 and Figure 3 As shown, according to one embodiment of the present invention, the cross-sectional shape of the oxygen-depleted solid charge 5 is matched with the cross-sectional shape of the hollow portion of the first thermal insulation structure 12; in addition, the solid energetic charge 6 is provided with a plurality of gas channels 61 that penetrate the body thereof in the axial direction; wherein the gas channels 61 are provided corresponding to the through holes on the charge retaining orifice plate 23 and the rectifying orifice plate 22. In this embodiment, the cross-sectional shape of the gas channel 61 can be set as a circular hole (see Fig.10 ), regular polygonal holes (see Fig.11 )wait.

[0119] In this embodiment, the opening area of ​​the through hole on the rectifying orifice plate 22 is larger than the opening area of ​​the gas channel 61. Specifically, the edge of the through hole on the rectifying orifice plate 22 away from the solid energetic charge 6 is set to be rounded or chamfered to effectively improve the flow guiding effect on the airflow, which is beneficial to prevent blockage. In addition, the opening area of ​​the through hole on the charge blocking orifice plate 23 is smaller than the opening area of ​​the gas channel 61; specifically, the edge of the through hole on the charge blocking orifice plate 23 close to the solid energetic charge 6 is set to be rounded or chamfered to effectively improve the flow guiding effect on the airflow, which is beneficial to prevent blockage.

[0120] In this embodiment, along the direction from the rectifying orifice plate 22 to the charge-blocking orifice plate 23, the cross section of the gas channel 61 can be set to a contraction cross section, that is, a setting in which the cross-sectional area gradually decreases, so as to effectively enhance the flushing ability of the airflow on the solid energetic charge 6. In addition, since different binder materials used in the solid energetic charge 6 have different combustion surface retreat rates at high temperatures, the number and cross-sectional area of ​​the gas channels 61 can be changed. Generally, when the combustion surface retreat rate is high, the number and cross-sectional area of ​​the gas channels 61 are low.

[0121] In this embodiment, the support skeleton 24 is embedded in the solid energetic charge 6. The support skeleton 24 is arranged near the charge blocking hole plate 23 along the axial direction of the solid energetic charge 6. The support skeleton 24 is arranged to support the solid energetic charge 6, so as to improve the structural stability of the solid energetic charge 6.

[0122] According to one embodiment of the present invention, the solid energetic charge 6 is made of a polymer solid fuel containing high-energy powder; wherein the high-energy powder can be aluminum powder or boron powder, etc., and the polymer solid fuel is made of a material with strong endothermic cracking ability, specifically polymethyl methacrylate (PMMA), polyethylene (PE) or hydroxy-terminated polybutadiene (HTPB). Through the above-mentioned setting, the solid energetic charge 6 is set in a combination of high-energy powder and polymer solid fuel, so that the binder in the solid energetic charge 6 can generate a large amount of low-molecular hydrocarbon compounds after endothermic cracking and carry the energetic metal powder in the charge into the primary fuel-rich gas to generate a second fuel-rich gas. The secondary fuel-rich gas thus generated has the characteristics of low temperature and high content of low-molecular hydrocarbon compounds, high activity and strong explosiveness, and can fully meet the application requirements of the solid rocket rotating detonation ramjet engine.

[0123] According to one embodiment of the present invention, the support skeleton 24 is made of ablative material, wherein the ablative material may be a high molecular polymer, such as resin, nylon, glass fiber reinforced nylon, etc. Through the above configuration, the support skeleton 24 is configured to be ablative, and in the later stage of the operation of the solid energetic charge 6, the support skeleton 24 is exposed and washed and ablated, thereby reducing redundant mass.

[0124] According to the present invention, a primary fuel-rich gas is generated through the stable combustion of the oxygen-depleted solid charge 5 in the first gas generator 1. When the primary fuel-rich gas flows through the second gas generator 2, the surface of the solid energetic charge 6 is washed and ablated by the high-temperature and high-speed primary fuel-rich gas, and the adhesive on the surface of the solid energetic charge 6 absorbs heat and decomposes into low-molecular gaseous products to drive high-energy powder into the primary fuel-rich gas mainstream. Based on the channel between the first gas generator 1 and the second gas generator 2, while achieving the sonic condition, the reaction state in the second gas generator 2 does not affect the working state inside the first gas generator 1. Therefore, the secondary fuel-rich gas of the gas-solid two-phase at the outlet of the second gas generator 2 has a higher energy density, which can enable the ramjet engine to achieve a higher energy specific impulse.

[0125] Combination Figure 1 and Figure 3 As shown, according to one embodiment of the present invention, the present invention provides an engine using the aforementioned series variable parameter rich fuel gas generating device, comprising: an engine housing a, a center body b arranged in the engine housing a, and a series variable parameter rich fuel gas generating device c installed in the center body b. In this embodiment, there is an intake and isolation section d1, a combustion chamber d2, and a nozzle section d3 of the engine spaced apart between the center body b and the engine housing a; wherein, along the axial direction of the engine housing a, the intake and isolation section d1, the combustion chamber d2, and the nozzle section d3 are sequentially connected. In this embodiment, the series variable parameter rich fuel gas generating device c comprises: a first gas generator 1, a second gas generator 2, and a gas collection injection structure 3 arranged in series in sequence, and a flow regulating device 4 arranged on the first gas generator 1; wherein, the second gas generator 2 and the gas collection injection structure 3 are coaxially arranged. In this embodiment, the gas collection injection structure 3 includes: a central connecting pipe 31, a conical distribution member 32 having a hollow distribution cavity; wherein the tip of the conical distribution member 32 is connected to one end of the central connecting pipe 31, and the hollow distribution cavity of the conical distribution member 32 is connected to the hollow part of the central connecting pipe 31; a plurality of output holes 32a connected to the hollow distribution cavity are evenly spaced on the circumferential side wall of the large diameter end of the conical distribution member 32. In this embodiment, the other end of the central connecting pipe 31 is connected to the second gas generator 2; the end of the conical distribution member 32 away from the central connecting pipe 31 is embedded in the side wall of the central body b, and the output holes 32a on the circumferential side wall of the conical distribution member 32 are connected to the combustion chamber d2.

[0126] In addition, the structural setting of the series variable parameter rich fuel gas generating device c is consistent with the above-mentioned method and will not be repeated here.

[0127] In order to further illustrate the present solution, the working principle of the series variable parameter rich fuel gas generating device of the present invention is further described.

[0128] Based on the ignition device 13 provided on the first gas generator 1, the oxygen-poor solid charge 5 in the first gas generator 1 is ignited under a controlled state, so as to generate a primary fuel-rich gas in the first gas generator 1;

[0129] Based on the servo drive 44 in the flow regulating device 4, the position of the slide valve 43 is adjusted to achieve the relative position of the regulating hole 43a on the slide valve 43 and the first through hole 122a on the first gas generator 1, thereby achieving the control of the opening of the first through hole 122a;

[0130] The primary rich fuel gas generated in the first gas generator 1 enters the second gas generator 2 in a controlled manner through the first through hole 122a, the first positioning hole 112a and the delivery pipe 14;

[0131] The surface of the solid energetic charge 6 in the second gas generator 2 is washed and ablated by the primary fuel-rich gas, and the binder on the surface of the solid energetic charge 6 absorbs heat and decomposes into low-molecular gaseous products, driving high-energy powder into the primary fuel-rich gas mainstream to produce secondary fuel-rich gas;

[0132] The secondary rich fuel gas is uniformly output through the transition pipe 217, the central connecting pipe 31, the conical distribution member 32 and the output hole 32a.

[0133] In order to further illustrate the present solution, the control strategy of the series variable parameter rich fuel gas generating device of the present invention is further elaborated.

[0134] In this embodiment, the series variable parameter rich fuel gas generation device of the present invention is based on the temperature sensor 15, the pressure sensor 16, the powder flow meter 218, and the flow regulating device 4, which work in coordination under the control of the control system. The specific control process includes:

[0135] (1) The preset control system receives a specific parameter gas flow adjustment instruction and obtains a rich fuel gas flow after calculation. ;

[0136] (2) Obtain the change of the primary rich fuel gas flow rate according to the primary rich fuel gas flow rate at the current moment ;

[0137] (3) The change in the working pressure of the gas generator is calculated based on the propellant burning rate formula , and then calculate the opening area change of the first via hole 122a ;

[0138] (4) According to the change of the opening area of ​​the first via hole 122a The servo drive 44 actuation angle is calculated by fitting the preset actuation angle curve ;

[0139] (5) Determine whether the internal working pressure of the first gas generator 1 at the new moment is equal to the theoretical required working pressure. If they are equal, proceed to the next step. If they are not equal, add a preset error fluctuation. Re-execution;

[0140] (6) Monitor the secondary rich fuel gas flow rate using the powder flow meter 218 Determine whether the current flow is the required secondary rich fuel gas flow If yes, the execution ends. If no, in a rich fuel gas flow Add error Then a new primary rich fuel gas flow is given again.

[0141] The above contents are merely examples of specific solutions of the present invention. For devices and structures not described in detail therein, it should be understood that they can be implemented by adopting general devices and general methods available in the art.

[0142] The above is only one solution of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A series variable parameter fuel-rich gas generation device based on solid energetic charge, characterized in that: include: A first gas generator (1), a second gas generator (2) and a gas collection injection structure (3) arranged in series, a flow regulating device (4) arranged on the first gas generator (1), an oxygen-depleted solid charge (5) arranged in the first gas generator (1), and a solid energetic charge (6) arranged in the second gas generator (2); A first through hole (122a) is provided at one end of the first gas generator (1) connected to the second gas generator (2); The second gas generator (2) and the gas collection and injection structure (3) are coaxially arranged; The gas collection and injection structure (3) comprises: a central connecting pipe (31), a conical distribution member (32) having a hollow distribution cavity; The tip of the conical distribution piece (32) is connected to one end of the central connecting pipe (31), and the hollow distribution cavity of the conical distribution piece (32) is in communication with the hollow portion of the central connecting pipe (31); A plurality of output holes (32a) in communication with the hollow distribution cavity are arranged at equal intervals on the circumferential side wall of the large diameter end of the conical distribution member (32); The other end of the central connecting pipe (31) is connected to the second gas generator (2); The flow regulating device (4) comprises: a positioning sleeve (41), a rotating shaft (42) installed in the positioning sleeve (41), and a slide valve (43) and a servo drive (44) respectively arranged at opposite ends of the rotating shaft (42); The rotating shaft (42) is rollingly connected to the positioning sleeve (41); The slide valve (43) is provided with an adjustment hole (43a) penetrating the body thereof; The servo drive (44) controls the swing of the slide valve (43) based on the rotating shaft (42), and is used to adjust the relative position of the regulating hole (43a) and the first through hole (122a), so as to control the opening of the first through hole (122a); The sliding valve (43) comprises: a long sliding valve body (431), and a supporting roller (432) connected to the sliding valve body (431); One end of the sliding valve body (431) is connected to the rotating shaft (42), and the supporting roller (432) is arranged at the other end of the sliding valve body (431); The supporting roller (432) is in rolling contact with the first gas generator (1).

2. The device for generating fuel-rich gas with variable parameters in series based on solid energetic charge according to claim 1 is characterized in that: The first gas generator (1) comprises: a hollow first shell (11), a first heat insulation structure (12) arranged inside the first shell (11), an ignition device (13), a delivery pipe (14), a temperature sensor (15) and a pressure sensor (16); The first heat insulation structure (12) is a hollow structure; The flow regulating device (4) and the delivery pipe (14) are arranged side by side at the front end of the first shell (11), wherein the first through hole (122a) is located at a position where the delivery pipe (14) is connected to the first shell (11); On a circumferential side surface of the first gas generator (1), the temperature sensor (15), the ignition device (13) and the pressure sensor (16) are arranged in sequence and spaced apart; The temperature sensor (15), the ignition device (13) and the pressure sensor (16) are arranged close to the front end of the first gas generator (1) and extend into the first heat insulation structure (12) respectively.

3. The device for generating fuel-rich gas with variable parameters in series based on solid energetic charge according to claim 2 is characterized in that: The first shell (11) comprises: a first hollow cylinder (111) with one end open and the other end closed, and a first end cover (112) detachably connected to the open end of the first hollow cylinder (111); The first end cover (112) is provided with a first positioning hole (112a) and a second positioning hole (112b); The first positioning hole (112a) is coaxially arranged with the delivery pipe (14), and the delivery pipe (14) is detachably connected to the first end cover (112); The flow regulating device (4) is coaxially arranged with the second positioning hole (112b), and the flow regulating device (4) is detachably connected to the first end cover (112); The first heat-insulating structure (12) comprises: a first heat-insulating cylinder (121) with one end open and the other end closed, a first heat-insulating end cover (122) detachably connected to the open end of the first heat-insulating cylinder (121), and a guide plate (123) detachably mounted on the inner side of the first heat-insulating end cover (122); A hollow cavity is formed between the guide plate (123) and the first heat-insulating end cover (122); The guide plate (123) is provided with a flow guide hole (123a), and the flow guide hole (123a) is coaxially arranged with the delivery pipe (14); The first through hole (122a) passes through the first heat-insulating end cover (122), and the first heat-insulating end cover (122) is also provided with a second through hole (122b) passing through; The first through hole (122a) and the first positioning hole (112a) are arranged coaxially; The second through hole (122b) and the second positioning hole (112b) are arranged coaxially.

4. The device for generating fuel-rich gas with variable parameters in series based on solid energetic charge according to claim 3 is characterized in that: A sealing ring (421) is provided between the rotating shaft (42) and the positioning sleeve (41); The slide valve (43) is located in a hollow cavity formed by the guide plate (123) and the first heat-insulating end cover (122); The supporting roller (432) is in rolling contact with the first heat insulating end cover (122).

5. The device for generating fuel-rich gas with variable parameters in series based on solid energetic charge according to claim 4 is characterized in that: A rolling support plate (122c) for supporting the support roller (432) is embedded in the inner side surface of the first heat-insulating end cover (122).

6. The device for generating rich fuel gas with variable parameters in series based on solid energetic charge according to claim 5 is characterized in that: The second gas generator (2) comprises: a second shell (21) which is hollow and open at both ends, a rectifying orifice plate (22) and a charge-blocking orifice plate (23) arranged in the second shell (21), and a supporting frame (24) arranged between the rectifying orifice plate (22) and the charge-blocking orifice plate (23); The through holes on the rectifying orifice plate (22) are arranged corresponding to the through holes on the medicine blocking orifice plate (23); The second shell (21) comprises: an intermediate cylinder (211), a first end cap (212) and a second end cap (213) arranged at opposite ends of the intermediate cylinder (211), a second heat-insulating cylinder (214) connected to the intermediate cylinder (211), a first heat-insulating end cap (215) connected to the first end cap (212), a second heat-insulating end cap (216) connected to the second end cap (213), a transition pipe (217) connected to the second end cap (213), and a powder flow meter (218) arranged on the transition pipe (217); The first sealing head (212) is provided with a first opening for connecting to the delivery pipe (14); The second sealing head (213) is provided with a second opening; Along the direction from the first end cap (212) to the second end cap (213), the rectifying orifice plate (22) and the drug blocking orifice plate (23) are sequentially arranged at intervals; The second opening is coaxially connected to one end of the transition pipe (217), and the other end of the transition pipe (217) is coaxially connected to the central connecting pipe (31); The radial dimensions of the second end cap (213) are arranged to gradually increase in a direction approaching the intermediate cylinder (211); The support skeleton (24) is a topological structure, wherein the support skeleton (24) comprises: a plurality of annular structures (241) and at least one connection structure (242); Along the radial direction of the support frame (24), the plurality of annular structures (241) are coaxially and oppositely arranged in sequence; The connection structure (242) is used to connect a plurality of the annular structures (241).

7. The device for generating rich fuel gas with variable parameters in series based on solid energetic charge according to claim 6 is characterized in that: The cross-sectional shape of the oxygen-deficient solid charge (5) is arranged to match the cross-sectional shape of the hollow portion of the first thermal insulation structure (12); The solid energetic charge (6) is provided with a plurality of fuel gas passages (61) penetrating the body thereof in the axial direction; The gas channel (61) is arranged correspondingly to the through holes on the medicine-blocking orifice plate (23) and the rectifying orifice plate (22); wherein the opening area of ​​the through holes on the rectifying orifice plate (22) is larger than the opening area of ​​the gas channel (61), and the opening area of ​​the through holes on the medicine-blocking orifice plate (23) is smaller than the opening area of ​​the gas channel (61); The supporting skeleton (24) is embedded in the solid energetic charge column (6).

8. The device for generating fuel-rich gas with variable parameters in series based on solid energetic charge according to claim 7 is characterized in that: The first heat-insulating cylinder (121) is a phenolic resin cylinder; The first thermal insulation end cover (122), the second thermal insulation cylinder (214), the first thermal insulation sealing head (215), and the second thermal insulation sealing head (216) are respectively made of high-silicon-oxygen material; The guide plate (123) is a carbon-carbon material plate; The sliding valve body (431), the supporting roller (432), and the rolling support plate (122c) are respectively made of molybdenum alloy material.

9. The device for generating rich fuel gas with variable parameters in series based on solid energetic charge according to claim 8, characterized in that: The solid energetic charge (6) is made of a polymer solid fuel containing high-energy powder; The support frame (24) is made of ablative material.

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