Self-pressurized valve and jet integrated engine

Abstract

The present application relates to the technical field of aerospace engine, in particular to a self-pressurized valve and injection integrated engine, comprising: an engine shell, a main valve assembly, a main gas-oxygen flow channel, a first sub gas-oxygen flow channel, a second sub gas-oxygen flow channel, a kerosene flow channel, a combustion nozzle, a solenoid valve and a combustor assembly. In the working process of the engine, only the on-off of high-pressure gas controlled by the solenoid valve is needed to control the start-up and shutdown of the engine, and the engine supply system does not need to carry an additional high-pressure control gas cylinder; at the same time, the extrusion and injection of the oxidant and fuel can be completed by using the propellant tank pressure of the engine, thereby reducing the complexity and structural mass of the whole engine.

Description

Technical Field

[0001] This invention relates to the field of aerospace engine technology, specifically to a self-pressurized valve-injection integrated engine. Background Technology

[0002] Currently, most dual-element attitude control engines or low-thrust liquid aerospace engines, both domestically and internationally, employ a squeeze-type supply system. This system uses high-pressure inert gas to pressurize the propellant tank, and then, in conjunction with the opening and closing of valves in the downstream oxidizer and fuel lines, forces the propellant into the combustion chamber for co-combustion.

[0003] While existing technologies have a simple logic, the entire system contains numerous components and requires additional high-pressure gas cylinders besides the propellant tank. Furthermore, the number of valves that need to be controlled during engine startup is large, and the startup sequence is complex. To simplify the engine supply system, reduce internal components, lighten the structural weight, improve the response speed of attitude control engines or low-thrust liquid aerospace engines, and simplify engine startup and shutdown control, it is necessary to further innovate the design of the engine thrust chamber head, optimize the valve structure, simplify the startup and shutdown sequence, and design a new type of engine that is simple in system design, compact in structure, lightweight, fast in response, and easy to control.

[0004] Therefore, there is a need to provide a self-boosting valve injection integrated engine to solve the above problems. Summary of the Invention

[0005] To simplify the engine supply system, reduce internal components, lighten structural weight, improve the response speed of attitude control engines or low-thrust liquid aerospace engines, and simplify engine start-up and shutdown control, this invention provides a self-pressurized valve-injection integrated engine to solve existing problems.

[0006] The present invention provides a self-boosting valve-injection integrated engine, which adopts the following technical solution, including:

[0007] The engine housing has a kerosene reservoir and a valve chamber, wherein the valve chamber includes an oxygen valve chamber and a kerosene valve chamber that are connected to each other.

[0008] The main valve assembly is slidably disposed in the valve chamber. The oxygen valve chamber of the valve chamber is provided with an elastic component for resetting the main valve assembly, and a fuel passage is provided along its axial direction.

[0009] Kerosene flow channel, which connects the kerosene storage tank and the kerosene valve chamber;

[0010] The main oxygen flow channel is located on the engine housing between the kerosene tank and the oxygen valve chamber. Its inlet is used to connect to the oxygen tank via an oxygen connector, and its outlet is connected to the oxygen valve chamber. The main oxygen flow channel is connected to a first sub-oxygen flow channel, a second sub-oxygen flow channel, and a third sub-oxygen flow channel. The first sub-oxygen flow channel connects the kerosene tank and the oxygen valve chamber and delivers oxygen to the kerosene tank to force kerosene into the kerosene flow channel. One end of the second sub-oxygen flow channel is connected to the main oxygen flow channel, and the other end is connected to the oxygen valve chamber. The third sub-oxygen flow channel is used to connect to the fuel passage of the main valve assembly.

[0011] The combustion nozzle is located inside the kerosene valve chamber, with its inlet connected to the outlet of the kerosene flow channel, and is used to atomize and spray out the kerosene.

[0012] The solenoid valve, located on the engine housing, is used to control the opening and closing of the second sub-oxygen flow channel;

[0013] And the burner assembly, which is located at the outlet of the kerosene valve chamber;

[0014] When the control solenoid valve opens, the high-pressure oxygen from the main oxygen flow channel enters the oxygen valve chamber from the second sub-oxygen flow channel, causing the main valve assembly to be pressurized. The elastic component compresses the main valve assembly to open, and the high-pressure oxygen sequentially enters the fuel passage of the main valve assembly through the main oxygen flow channel and the third sub-oxygen flow channel and is ejected. At the same time, the high-pressure oxygen enters the kerosene storage tank through the first sub-oxygen flow channel. Under the pressure of the kerosene storage tank, the kerosene enters the kerosene valve chamber from the kerosene flow channel and is atomized by the combustion nozzle before being ejected. The atomized kerosene mixes with the oxygen ejected from the fuel passage and burns in the burner assembly to generate thrust.

[0015] A further technical solution of the present invention includes a main valve assembly comprising:

[0016] The oxygen valve core and the kerosene valve core are slidably disposed within the oxygen valve cavity and the kerosene valve core is slidably disposed within the kerosene valve cavity. The oxygen valve core and the kerosene valve core are connected by a guide post, and the end of the kerosene valve core opposite to the oxygen valve core is connected to the guide post. The guide rod is slidably disposed within the connecting hole between the kerosene valve cavity and the oxygen valve cavity. The opposite end faces of the oxygen valve core and the kerosene valve core and the outer peripheral surface of the guide rod form an annular guide groove. The guide rod is slidably disposed at the connecting hole between the kerosene valve cavity and the burner assembly. The gas flow channel passes through the oxygen valve core, the guide post, the kerosene valve core and the guide rod in sequence.

[0017] The support column is located in the groove at the end of the oxygen valve core away from the kerosene valve core. A gas-oxygen sealing structure is provided between the end of the support column away from the oxygen valve core and the outlet of the third sub-gas-oxygen flow channel. A gas inlet for connecting the gas flow channel is provided radially.

[0018] An annular support ear is provided radially at the end of the oxygen valve core away from the kerosene valve core. A reset assembly is provided between the side of the mounting base facing the kerosene valve cavity and the inner wall of the oxygen valve cavity. A pressure action cavity is formed between the side of the annular support ear away from the reset assembly and the inner wall of the oxygen valve cavity. The pressure action cavity is connected to the second sub-oxygen flow channel.

[0019] And a kerosene sealing structure, which is located between the end face of the kerosene valve core and the connecting hole between the oxygen valve chamber and the kerosene valve chamber.

[0020] A further technical solution of the present invention includes an elastic component comprising a spring, which is sleeved on the oxygen valve core between the annular support ear and the inner wall of the oxygen valve cavity.

[0021] A further technical solution of the present invention is that a kerosene collecting chamber is provided on the engine housing, wherein the outlet of the kerosene flow channel is connected to the kerosene collecting chamber, and the kerosene collecting chamber is connected to the annular guide groove through the outlet channel.

[0022] In a further technical solution of the present invention, both the gas-oxygen sealing structure and the kerosene sealing structure adopt a cone-to-cone sealing structure, a spherical-to-cone sealing structure, or an end-face sealing structure.

[0023] A further technical solution of the present invention is that an electromagnetic valve seal is provided on the output end of the electromagnetic valve, and the electromagnetic valve seal is used to block the connection between the first sub-oxygen flow channel and the pressure action chamber.

[0024] A further technical solution of the present invention includes a burner assembly comprising:

[0025] The combustion chamber, whose inlet is connected to the outlet of the kerosene valve chamber in the engine housing;

[0026] And the spark plug, which is located on one side of the combustion chamber, with its ignition end located inside the combustion chamber.

[0027] A further technical solution of the present invention includes a guide cylinder concentric with the guide post inside the kerosene valve cavity. The guide post is sleeved inside the guide cylinder. One end of the guide cylinder is connected to the gas passage of the guide post, and the other end of the guide cylinder is connected to the communication hole between the kerosene valve cavity and the burner assembly. An annular kerosene groove is formed between the outer wall of the guide cylinder and the inner wall of the kerosene valve cavity. The combustion nozzle is arranged radially in the guide cylinder and is used to atomize the kerosene in the annular kerosene groove and spray it into the guide cylinder.

[0028] In a further technical solution of the present invention, the combustion nozzle adopts a tangential hole.

[0029] A further technical solution of the present invention is that the kerosene storage tank adopts a membrane box storage tank, the first sub-oxygen flow channel is connected to the gas chamber of the membrane box storage tank, and the membrane box is filled with kerosene. In this case, after the oxygen enters the gas chamber of the kerosene storage tank through the first sub-oxygen flow channel, the membrane box is squeezed under the action of the oxygen pressure, and the kerosene in the membrane box is squeezed into the kerosene flow channel.

[0030] The beneficial effects of this invention are:

[0031] This invention integrates valves and injectors through optimized structural design. During engine operation, the engine only requires a solenoid valve to control the flow of high-pressure gas to start and shut down; the engine supply system does not need to carry an additional high-pressure control gas cylinder. Simultaneously, the pressure in the engine's propellant tank is sufficient for the compression and injection of oxidizer and fuel. This solves the problem of the complexity, weight, and numerous control valves inherent in traditional low-thrust liquid aerospace engines or attitude control propulsion systems, which require independent supply systems and high-pressure gas cylinders. The engine designed in this invention features a simple, compact, and lightweight structure with fast response and easy control. Its head structure and supply system are significantly different from all existing low-thrust liquid aerospace engines. Future applications in aerospace propulsion systems can greatly simplify attitude control propulsion systems and improve aerospace performance.

[0032] Secondly, this invention does not require external gas cylinders to provide external control gas. It can complete the extrusion injection of bicomponent propellants by relying solely on the medium pressure of its own propellant. The self-pressurized system does not require an external gas source, which greatly simplifies the overall engine system and reduces the overall system complexity and structural weight. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the main valve assembly of a self-boosting valve-injection integrated engine in an embodiment of the present invention when it is closed;

[0035] Figure 2 This is a schematic diagram showing the state of the main valve assembly of a self-boosting valve-injection integrated engine when it is open, according to an embodiment of the present invention.

[0036] Figure 3 for Figure 2 A structural diagram of the main valve assembly, engine housing, and solenoid valve in the engine;

[0037] Figure 4 for Figure 3 A schematic diagram of the main valve assembly in the diagram;

[0038] Figure 5This is a system block diagram of a self-boosting valve-injection integrated engine according to an embodiment of the present invention;

[0039] Figure 6 This is a schematic diagram of the sealing structure in an embodiment of the present invention.

[0040] In the diagram: 1. Kerosene tank; 2. Engine housing; 3. Solenoid valve; 4. Main valve assembly; 5. Spark plug; 6. Combustion chamber; 21. Main oxygen flow channel; 22. First sub-oxygen flow channel; 23. Pressure action chamber; 24. Kerosene flow channel; 25. Kerosene collection chamber; 26. Tangential hole; 27. Second sub-oxygen flow channel; 28. Intake passage; 29. ​​Third sub-oxygen flow channel; 31. Solenoid valve seal; 41. Oxygen sealing structure; 42. Support column; 43. Combustion flow channel; 44. Oxygen valve core; 45. Guide column; 46. Kerosene valve core; 47. Guide column; 441. Annular support lug; 461. Kerosene sealing structure. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] An embodiment of the self-boosting valve-injection integrated engine of the present invention, such as... Figure 1 , Figure 2 , Figure 3 and Figure 5As shown, it includes: an engine housing 2, a main valve assembly 4, a main oxygen flow channel 21, a first sub-oxygen flow channel 22, a second sub-oxygen flow channel 27, a kerosene flow channel 24, a combustion nozzle, a solenoid valve 3, and a burner assembly; the engine housing 2 is provided with a kerosene reservoir 1 and a valve chamber, wherein the valve chamber includes a connected oxygen valve chamber and a kerosene valve chamber; the main valve assembly 4 is slidably disposed in the valve chamber, and the oxygen valve chamber is provided with an elastic component for resetting the main valve assembly 4, and a fuel passage is provided along the axial direction of the main valve assembly 4; the main oxygen flow channel 21 is disposed in the kerosene reservoir 1 and... On the engine housing 2 between the oxygen valve chamber and the gas-oxygen flow channel 21, the inlet of the main oxygen flow channel 21 is used to connect to the oxygen storage tank via an oxygen nozzle, and the outlet of the main oxygen flow channel 21 is connected to the oxygen valve chamber; the kerosene flow channel 24 is used to connect the kerosene storage tank 1 and the kerosene valve chamber; the outlet of the main oxygen flow channel 21 is connected to a first sub-oxygen flow channel 22, a second sub-oxygen flow channel 27, and a third sub-oxygen flow channel; the first sub-oxygen flow channel 22 is used to connect the kerosene storage tank 1 and the oxygen valve chamber, and is used to deliver oxygen to the kerosene storage tank 1 to squeeze the kerosene in the kerosene storage tank 1 into the kerosene flow channel 24; the second One end of the second sub-oxygen flow channel 27 is connected to the main oxygen flow channel 21, and the other end of the second sub-oxygen flow channel 27 is connected to the oxygen valve chamber; the third sub-oxygen flow channel is used to connect to the fuel passage of the main valve assembly 4; the combustion nozzle is located in the kerosene valve chamber, and the inlet of the combustion nozzle is connected to the outlet of the kerosene flow channel 24, and the combustion nozzle is used to atomize and spray kerosene; the solenoid valve 3 is located on the engine housing 2, and the solenoid valve 3 is used to control the opening and closing of the second sub-oxygen flow channel 27, and the burner assembly is located at the outlet of the kerosene valve chamber; wherein, controlling the opening of the solenoid valve 7, the main oxygen flow channel 21... High-pressure oxygen gas enters the oxygen valve chamber through the second sub-oxygen gas flow channel 27, causing the main valve assembly 4 to be pressurized. At this time, the elastic component compresses the main valve assembly 4 to open, and the high-pressure oxygen gas sequentially enters the fuel passage of the main valve assembly 4 through the main oxygen flow channel 21 and the third sub-oxygen gas flow channel and is ejected. At the same time, the high-pressure oxygen gas enters the kerosene storage tank 1 through the first sub-oxygen gas flow channel 22. Under the pressure of the kerosene storage tank 1, the kerosene enters the kerosene valve chamber through the kerosene flow channel 24 and is atomized by the combustion nozzle and then ejected. The atomized kerosene mixes with the oxygen gas ejected from the fuel passage and burns in the burner assembly to generate thrust.

[0043] For example, such as Figure 1 , Figure 3 and Figure 4As shown, in one specific embodiment, the main valve assembly includes: an oxygen valve core 44, a kerosene valve core 46, a support column 42, an annular support lug 441, and a kerosene sealing structure 461; the oxygen valve core 44 and the kerosene valve core 46 are slidably disposed in the oxygen valve cavity, and the kerosene valve core 44 and the kerosene valve core 46 are slidably disposed in the kerosene valve cavity, and are connected by a guide column 45. A guide column 47 is connected to the end of the kerosene valve core 46 facing away from the oxygen valve core 44; wherein, a guide rod is slidably disposed in the connecting hole between the kerosene valve cavity and the oxygen valve cavity, and an annular guide groove is formed on the opposite end faces of the oxygen valve core 44 and the kerosene valve core 46 and the outer peripheral surface of the guide rod; the guide rod 47 is slidably disposed at the connecting hole between the kerosene valve cavity and the burner assembly, and the gas flow channel sequentially passes through the oxygen valve core 44, the guide column, the kerosene valve core 46, and the guide rod. A rod 47; a support column 42 is disposed in the groove of the oxygen valve core 44 away from the kerosene valve core 46. A gas-oxygen sealing structure 41 is provided between the end of the support column 42 away from the oxygen valve core 44 and the outlet of the third sub-oxygen flow channel 29. A gas inlet 421 for connecting the gas flow channel 43 is provided radially on the support column 42. An annular support ear 441 is disposed radially on the end of the oxygen valve core 44 away from the kerosene valve core 46. A reset assembly is provided between the mounting base 441 facing the kerosene valve cavity and the inner wall of the oxygen valve cavity. A pressure chamber 23 is formed between the side of the annular support ear 411 away from the reset assembly and the inner wall of the oxygen valve cavity. The pressure chamber 23 is connected to the second sub-oxygen flow channel 27 through the air inlet channel 28. A kerosene sealing structure 461 is disposed between the end face of the kerosene valve core 46 and the connecting hole of the oxygen valve cavity and the kerosene valve cavity.

[0044] In this embodiment, the reset component uses a reset spring. The reset spring is sleeved between the oxygen valve core 44 on the side of the mounting base 441 facing the kerosene valve cavity and the inner wall of the oxygen valve cavity. One end of the reset spring is connected to the side of the mounting base 441 facing the kerosene valve cavity, and the other end of the reset spring is connected to the inner wall of the oxygen valve cavity.

[0045] Among them, such as Figure 1 , Figure 3 and Figure 4 As shown, in this embodiment, a guide cylinder concentric with the guide post 47 is provided inside the kerosene valve cavity. The guide post 47 is sleeved inside the guide cylinder. One end of the guide cylinder is connected to the gas passage of the guide post 47, and the other end of the guide cylinder is connected to the communication hole between the kerosene valve cavity and the burner assembly. An annular kerosene groove is formed between the outer wall of the guide cylinder and the inner wall of the kerosene valve cavity. The combustion nozzle is arranged radially in the guide cylinder and is used to atomize the kerosene in the annular kerosene groove and spray it into the guide cylinder. In this embodiment, the combustion nozzle adopts a tangential hole 26.

[0046] Among them, both the oxygen sealing structure 41 and the kerosene sealing structure 461 adopt a conical-to-conical sealing structure, a spherical-to-conical sealing structure, or an end-face sealing structure. For example... Figure 6As shown, Figure 6 middle Figure 6 'a' represents a cone-to-cone sealing structure. Figure 6 b is a spherical-to-conical sealing structure. In this embodiment, it adopts... Figure 1 The end-face sealing structure shown.

[0047] Among them, such as Figure 1 , Figure 2 and Figure 3 As shown, in this embodiment, a solenoid valve seal 31 is provided on the output end of the solenoid valve 3. The solenoid valve seal 31 is used to block the air intake channel 28 between the first sub-oxygen flow channel 22 and the pressure action chamber 23.

[0048] For example, such as Figure 1 and Figure 2 As shown, in one specific embodiment, in order to make the kerosene flow rate into the kerosene valve chamber more stable, this embodiment provides a kerosene collecting chamber 25 on the engine housing 2, wherein the outlet of the kerosene flow channel 24 is connected to the kerosene collecting chamber 25, and the kerosene collecting chamber 25 is connected to the annular guide groove through the outlet channel.

[0049] For example, in one specific embodiment, the burner assembly includes: a combustion chamber 6 and a spark plug 5, the inlet of the combustion chamber 6 being connected to the outlet of the kerosene valve chamber of the engine housing 2; the spark plug 5 is disposed on one side of the combustion chamber 6, and the ignition end of the spark plug 5 is located inside the combustion chamber 6.

[0050] For example, in one specific embodiment, the kerosene storage tank 1 is a membrane box storage tank. The gas chamber of the membrane box storage tank is connected to the first sub-oxygen flow channel 22. The membrane box of the membrane box storage tank is filled with kerosene. After the oxygen enters the gas chamber of the kerosene storage tank 1 through the first sub-oxygen flow channel 22, it squeezes the membrane box under the pressure of the oxygen, squeezing the kerosene in the membrane box into the kerosene flow channel 24. It should be noted that the membrane box storage tank is prior art. This embodiment simply replaces the existing high-pressure gas cylinder supply to drive the membrane box with the oxygen in the propellant to drive the membrane box. Therefore, this embodiment will not be described in detail.

[0051] Working principle

[0052] The oxygen gas is filled into the oxygen valve core 44 through the third sub-oxygen gas flow channel 29 connected to the main oxygen gas flow channel 21, and then filled into the valve core of the solenoid valve 3 through the second sub-oxygen gas flow channel 27 connected to the main oxygen gas flow channel 21.

[0053] When the engine is running, the system controls the solenoid valve 3 to open. The oxygen gas before the valve core of the solenoid valve 3 enters the pressure chamber 23 of the main valve through the second sub-oxygen flow channel 27 and the intake flow channel 28 in the engine housing 2. Under the pressure of the oxygen gas, the main valve assembly 4 is driven to move down and open the engine's main valve assembly 4. Since the oxygen valve core 44 and the kerosene valve core 46 are a single unit, when the main valve assembly 4 moves down, the oxygen valve core 44 and the kerosene valve core 46 move down simultaneously. The oxygen gas sealing structure 41 of the oxygen valve core 44 moves away to release the blockage of the connecting hole between the third sub-oxygen flow channel 29 and the oxygen valve chamber. At the same time, the kerosene sealing structure 461 of the kerosene valve core 46 moves away to release the blockage of the connecting hole between the kerosene valve chamber and the oxygen valve chamber. That is, the kerosene circuit valve and the oxygen gas circuit valve open simultaneously. At this time, the main valve starts, and the oxygen in the oxygen valve chamber before the oxygen valve core 44 is divided into two oxygen streams. One oxygen stream enters the kerosene storage tank 1 through the first sub-oxygen flow channel 22 as a pressure source for the liquid circuit to squeeze the kerosene, so that the kerosene is sprayed from the kerosene flow channel 24 through the combustion nozzle into the connecting hole between the kerosene valve chamber and the combustion chamber 6. The other oxygen stream directly enters the gas flow channel 43 from the outlet of the third sub-oxygen flow channel 29 through the gas inlet 421 of the main valve assembly 4, and is then output through the gas flow channel 43 into the connecting hole between the kerosene valve chamber and the combustion chamber 6. That is, the oxygen and atomized kerosene enter the combustion chamber 6 to complete the mixing and atomization, and then the mixed propellant is ignited by the spark plug 5, and the engine completes the ignition work.

[0054] When the engine needs to be shut down, the solenoid valve 3 is de-energized, and the high-pressure oxygen supply to the pressure chamber 23 is cut off by the valve core of the solenoid valve 3. At this time, the pressure chamber 23 is depressurized, and under the action of the return spring, it drives the main valve assembly to move upward. That is, the kerosene valve core 46 and the oxygen valve core 44 move upward together. The upward movement of the oxygen valve core 44 causes the oxygen-gas sealing structure 41 on the oxygen valve core 44 to block the communication hole between the third sub-oxygen flow channel 29 and the oxygen valve chamber. The upward movement of the kerosene valve core 46 causes the kerosene sealing structure 461 on the kerosene valve core 46 to block the communication hole between the kerosene valve chamber and the oxygen valve chamber. That is, the oxygen-gas path and the kerosene path are closed, the propellant injection stops, and the engine shuts down. During the operation of this engine, the solenoid valve 3 controls the start and stop of the engine by controlling the on and off of the high-pressure gas. It is the only valve that needs to be controlled during the start and stop of the engine. During the process of the two-phase propellant entering the combustion chamber 6, there is no external pressure assistance. The compression of the two-phase propellant is fully utilized by the pressure of the oxygen-gas itself. The design scheme achieved the expected design effect.

[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A self-boosting valve-injection integrated engine, characterized in that, include: The engine housing has a kerosene reservoir and a valve chamber, wherein the valve chamber includes an oxygen valve chamber and a kerosene valve chamber that are connected to each other. The main valve assembly is slidably disposed in the valve chamber. The oxygen valve chamber of the valve chamber is provided with an elastic component for resetting the main valve assembly, and a fuel passage is provided along its axial direction. Kerosene flow channel, which connects the kerosene storage tank and the kerosene valve chamber; The main oxygen flow channel is located on the engine housing between the kerosene tank and the oxygen valve chamber. Its inlet is used to connect to the oxygen tank via an oxygen connector, and its outlet is connected to the oxygen valve chamber. The main oxygen flow channel is connected to a first sub-oxygen flow channel, a second sub-oxygen flow channel, and a third sub-oxygen flow channel. The first sub-oxygen flow channel connects the kerosene tank and the oxygen valve chamber and delivers oxygen to the kerosene tank to force kerosene into the kerosene flow channel. One end of the second sub-oxygen flow channel is connected to the main oxygen flow channel, and the other end is connected to the oxygen valve chamber. The third sub-oxygen flow channel is used to connect to the fuel passage of the main valve assembly. The combustion nozzle is located inside the kerosene valve chamber, with its inlet connected to the outlet of the kerosene flow channel, and is used to atomize and spray out the kerosene. The solenoid valve, located on the engine housing, is used to control the opening and closing of the second sub-oxygen flow channel; And the burner assembly, which is located at the outlet of the kerosene valve chamber; When the control solenoid valve opens, the high-pressure oxygen from the main oxygen flow channel enters the oxygen valve chamber from the second sub-oxygen flow channel, causing the main valve assembly to be pressurized. The elastic component is compressed, and the main valve assembly opens. The high-pressure oxygen then enters the fuel passage of the main valve assembly and is ejected sequentially through the main oxygen flow channel and the third sub-oxygen flow channel. At the same time, the high-pressure oxygen enters the kerosene tank through the first sub-oxygen flow channel. Under the pressure of the kerosene tank, the kerosene enters the kerosene valve chamber from the kerosene flow channel and is atomized by the combustion nozzle before being ejected. The atomized kerosene mixes with the oxygen ejected from the fuel passage and burns in the burner assembly to generate thrust.

2. The self-boosting valve-injection integrated engine according to claim 1, characterized in that, The main valve assembly includes: The oxygen valve core and the kerosene valve core are slidably disposed within the oxygen valve cavity and the kerosene valve core is slidably disposed within the kerosene valve cavity. The oxygen valve core and the kerosene valve core are connected by a guide post. A guide rod is connected to the end of the kerosene valve core that is away from the oxygen valve core. The guide post is slidably disposed within the connecting hole between the kerosene valve cavity and the oxygen valve cavity. The opposite end faces of the oxygen valve core and the kerosene valve core and the outer peripheral surface of the guide rod form an annular guide groove. The guide rod is slidably disposed at the connecting hole between the kerosene valve cavity and the burner assembly. The gas flow channel passes through the oxygen valve core, the guide post, the kerosene valve core and the guide rod in sequence. The support column is located in the groove at the end of the oxygen valve core away from the kerosene valve core. A gas-oxygen sealing structure is provided between the end of the support column away from the oxygen valve core and the outlet of the third sub-gas-oxygen flow channel. A gas inlet for connecting the gas flow channel is provided radially. An annular support ear is provided radially at the end of the oxygen valve core away from the kerosene valve core. A reset component is provided between the side of the annular support ear facing the kerosene valve cavity and the inner wall of the oxygen valve cavity. A pressure action cavity is formed between the side of the annular support ear away from the reset component and the inner wall of the oxygen valve cavity. The pressure action cavity is connected to the second sub-oxygen flow channel. And a kerosene sealing structure, which is located between the end face of the kerosene valve core and the connecting hole between the oxygen valve chamber and the kerosene valve chamber.

3. The self-boosting valve-injection integrated engine according to claim 2, characterized in that, The elastic component includes a spring that is fitted onto the oxygen valve core between the annular support lug and the inner wall of the oxygen valve chamber.

4. A self-boosting valve-injection integrated engine according to claim 2, characterized in that, The engine housing is provided with a kerosene collection chamber, wherein the outlet of the kerosene flow channel is connected to the kerosene collection chamber, and the kerosene collection chamber is connected to the annular guide groove through the outlet channel.

5. A self-boosting valve-injection integrated engine according to claim 2, characterized in that, Both the oxygen-gas sealing structure and the kerosene sealing structure adopt a cone-to-cone sealing structure, a spherical-to-cone sealing structure, or an end-face sealing structure.

6. A self-boosting valve-injection integrated engine according to claim 2, characterized in that, The output end of the solenoid valve is equipped with a solenoid valve seal, which is used to block the connection between the first sub-oxygen flow channel and the pressure action chamber.

7. A self-boosting valve-injection integrated engine according to claim 1, characterized in that, The burner assembly includes: The combustion chamber, whose inlet is connected to the outlet of the kerosene valve chamber in the engine housing; And the spark plug, which is located on one side of the combustion chamber, with its ignition end located inside the combustion chamber.

8. A self-boosting valve-injection integrated engine according to claim 1, characterized in that, A guide cylinder concentric with the guide column is provided inside the kerosene valve cavity. The guide column is sleeved inside the guide cylinder. One end of the guide cylinder is connected to the gas passage of the guide column, and the other end of the guide cylinder is connected to the communication hole between the kerosene valve cavity and the burner assembly. An annular kerosene groove is formed between the outer wall of the guide cylinder and the inner wall of the kerosene valve cavity. The combustion nozzle is set in the radial direction of the guide cylinder. The combustion nozzle is used to atomize the kerosene in the annular kerosene groove and spray it into the guide cylinder.

9. A self-boosting valve-injection integrated engine according to claim 8, characterized in that, The combustion nozzle uses a tangential orifice.

10. A self-boosting valve-injection integrated engine according to claim 1, characterized in that, The kerosene storage tank adopts a membrane box storage tank. The first sub-oxygen flow channel is connected to the gas chamber of the membrane box storage tank. The membrane box is filled with kerosene. When the oxygen enters the gas chamber of the kerosene storage tank through the first sub-oxygen flow channel, it squeezes the membrane box under the pressure of the oxygen, squeezing the kerosene in the membrane box into the kerosene flow channel.

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