Micro-channel additive manufacturing method for head of thruster of hydrazine-free single-component propulsion system and residue cleaning method and system

Abstract

The invention discloses a hydrazine-free monopropellant propulsion system thruster head micro-channel additive manufacturing method and a residue cleaning method and system, micro-channels are printed according to a preset wall thickness and edge hooking parameters of multiple sets of 3D printing devices, the surface roughness of the corresponding multiple sets of micro-channels is tested, and the optimal edge hooking parameters are determined; a micro-channel at the head of the thruster is designed to be spiral, and configuration is carried out according to the hole diameter and the wall thickness of the spiral micro-channel at the head of the thruster; and adjusting the edge hooking parameter in the 3D printing equipment to be the optimal edge hooking parameter so as to control the surface roughness after the printing of the micro-channel is completed. By optimizing 3D printing parameters and micro-channel design, the manufacturing precision and performance of the head of the thruster of the hydrazine-free single-component propulsion system are improved. Specifically, the printing of the preset wall thickness and multiple groups of edge hooking parameters is beneficial to ensuring the surface quality of the micro-channel, and the micro-channel with the spiral design can enhance the hydrodynamic performance to obtain the flow resistance meeting the requirement.

Description

Technical Field

[0001] This invention belongs to the field of microfluidic manufacturing technology, and particularly relates to a method for additive manufacturing of microfluidic channels for the thruster head of an anhydrous hydrazine monocomponent propulsion system, a method and system for cleaning residues. Background Technology

[0002] As a core component of spacecraft, the space propulsion system provides the impulse required for orbital transfer and attitude control, and to a certain extent determines the size of the spacecraft, its maximum flight distance, and the success or failure of the mission. Major space missions such as manned lunar landings, satellite constellations, and deep space exploration have placed high demands on space propulsion systems, requiring high thrust, high reliability, high performance, low cost, short cycle time, and reusability. The anhydrous hydrazine monocomponent propulsion system is a rocket engine that uses anhydrous hydrazine as fuel, characterized by its simple structure and stable thrust. This system is widely used in the aerospace field, such as for the orbital launch of satellites and spacecraft, providing power support for space exploration. The head of the anhydrous hydrazine monocomponent propulsion system is the core component of the attitude control engine, ensuring the uniform distribution of propellant in the decomposition chamber. It guarantees the propellant guidance and distribution in the gas generator and thrust chamber, and contains a spatially curved capillary structure with an inner diameter of 0.5 mm.

[0003] The complex piping connections of space propulsion systems occupy a significant amount of space, making it difficult to meet the lightweight and integrated requirements of microsatellites. Traditional subtractive machining techniques struggle to form such complex flow channels. Metal additive manufacturing, a method that adds material layer by layer to create three-dimensional complex structures, enables integrated manufacturing, significantly improving overall product performance, shortening development cycles, increasing material utilization, and facilitating rapid design iteration and optimization. It is currently widely used in the development and production of numerous key aerospace products both domestically and internationally.

[0004] This places higher demands on structural design, and traditional subtractive manufacturing methods suffer from long production cycles, low raw material utilization, and high production costs. Therefore, innovating and developing space propulsion system design technologies and transforming manufacturing models are urgently needed. The most direct and effective solution to the problems of traditional processing methods, such as the inability to achieve integration, miniaturization, poor consistency, and numerous processing steps, is to find advanced processing and manufacturing methods and processes. Additive manufacturing technology can achieve integrated manufacturing of complex structures, offering advantages such as low manufacturing costs and short cycles. It provides new technologies and methods for manufacturing satellite propulsion system components, effectively solving the manufacturing challenges of complex geometric structures, achieving integrated manufacturing of propulsion systems, and improving the integration level of propulsion systems.

[0005] However, SLM technology suffers from dimensional inaccuracies and internal powder blockage issues when printing microstructures, especially microchannel structures. Additive manufacturing capillary head structures integrate independently distributed capillaries into a heat-insulating frame, achieving lower thermal resistance. Through high flow rate, high integration, and high aspect ratio design, cooling is enhanced, the heat return area is reduced, and the heat conduction distance is increased, thereby improving the thermal resistance of the additive manufacturing capillary head.

[0006] The head structure contains microchannels with a size of 0.5mm. When printing 0.5mm microchannels, additive manufacturing technology often encounters problems such as clogging and residue that cannot be cleaned properly, resulting in the entire flow channel being blocked or residue being sprayed out during use. Summary of the Invention

[0007] To address the aforementioned problems, the present invention aims to provide an additive manufacturing method, a residue cleaning method, and a system for the microchannel of the thruster head in an anhydrous hydrazine monocomponent propulsion system. This method can solve the problems of frequent clogging and incomplete residue cleaning in the additive manufacturing of 0.5mm microchannels in the prior art.

[0008] The technical solution provided by this invention is: a method for additive manufacturing of microchannels in the thruster head of an anhydrous hydrazine monocomponent propulsion system, comprising the following steps:

[0009] Microchannels were printed with preset wall thickness and outlining parameters of multiple 3D printing devices, and the surface roughness of the corresponding multiple microchannels was tested to determine the optimal outlining parameters.

[0010] The thruster head microchannel is designed in a spiral shape, with the aperture and wall thickness of the spiral thruster head microchannel configured accordingly.

[0011] Adjust the outlining parameters in the 3D printing equipment to the optimal outlining parameters to control the surface roughness after microchannel printing is completed.

[0012] Preferably, the outlining parameters include power P and scanning speed v, with the optimal outlining parameters being power P of 180W and scanning speed v of 700mm / s.

[0013] Preferably, the microchannel is designed with an aperture of 0.6-0.7 mm and a wall thickness of 0.4 mm-0.6 mm to achieve an actual test aperture of 0.5 mm.

[0014] Preferably, when the microchannel at the thruster head is designed as a spiral, a powder cleaning connector is designed at one end, wherein the inner diameter of the distal end of the powder cleaning connector is larger than the inner diameter of the proximal end.

[0015] Based on the same concept, the present invention also provides a method for cleaning additive manufacturing residues in the microchannel of the thruster head of an anhydrous hydrazine monocomponent propulsion system, comprising the following steps:

[0016] The two ends of the microchannel are sealed and connected to a cleaning device, which pumps a high-pressure liquid flow into the microchannel.

[0017] The high-pressure liquid flow is maintained for a preset time to clean the residue in the microchannel.

[0018] Preferably, the liquid stream is deionized water, and the cleaning device pressurizes the deionized water to 3 MPa and then delivers it into the microchannel.

[0019] Preferably, the input end of the microchannel is equipped with a powder cleaning connector, which is cylindrical with an inner diameter of 6mm, a wall thickness of 2.5mm, and a height of 16mm.

[0020] Preferably, after the high-pressure liquid flow continues for a preset time, the water that has passed through the microchannel is collected, and a laser particle size analyzer is used to detect whether there are any residues in the beaker with a size greater than 50 μm. If there are none, it is determined that the residue removal was successful.

[0021] Based on the same concept, the present invention also provides a microchannel additive manufacturing residue cleaning system for anhydrous hydrazine monocomponent propulsion system thruster head, comprising: a water storage device, an inlet pipe, a water pump, and an outlet pipe. The water storage device stores deionized water. The inlet pipe connects the inlet of the water pump to the water storage device. The outlet pipe connects the outlet of the water pump to one end of the microchannel. The cleaning system pumps a high-pressure liquid flow into the microchannel to clean the residue in the microchannel.

[0022] Based on the same concept, the present invention also provides an electronic device, comprising:

[0023] The memory is used to store the processing program;

[0024] The processor, when executing the processing program, implements either the additive manufacturing method for the microchannel of the thruster head of the anhydrous hydrazine monocomponent propulsion system described above, or the residue cleaning method for the additive manufacturing of the microchannel of the thruster head of the anhydrous hydrazine monocomponent propulsion system described above.

[0025] Because the present invention adopts the above technical solution, it has the following advantages and positive effects compared with the prior art:

[0026] By optimizing 3D printing parameters and microchannel design, the manufacturing precision and performance of the thruster head of the anhydrous hydrazine monocomponent propulsion system have been improved. Specifically, printing with preset wall thickness and multiple sets of outlining parameters helps ensure the surface quality of the microchannels, while the spiral-shaped microchannel design enhances hydrodynamic performance to achieve the required flow resistance. The microchannel structure of the head needs a certain degree of curvature or arc to ensure that vibrations and heat generated during propulsion system operation do not damage the channel structure, leading to system failure. Simultaneously, the size and shape of the pipe affect the friction and inertial forces during fluid flow, thus affecting flow resistance. The spiral-shaped bend structure of this invention ensures the required flow resistance. Attached Figure Description

[0027] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, wherein:

[0028] Figure 1 This invention relates to a microchannel structure for the thruster head of an anhydrous hydrazine monocomponent propulsion system.

[0029] Figure 2 This is a schematic diagram of the microchannel hydraulic cleaning principle of the present invention;

[0030] Figure 3 This is a schematic diagram illustrating the principle of residue detection in this invention. Detailed Implementation

[0031] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become clearer from the following description and claims. It should be noted that the drawings are all in a very simplified form and use non-precise ratios, and are only used to facilitate and clarify the illustration of the embodiments of the present invention.

[0032] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0033] Additive manufacturing (AM) is an advanced manufacturing technology that began development in the 1980s, also known as 3D printing. This technology involves creating a three-dimensional model and then rapidly heating and solidifying a metallic material using a high-energy-density heat source, gradually building it from points, lines, and surfaces. It is suitable for manufacturing complex, moldless parts and features lightweight, customization, and high utilization rates, laying a solid foundation for the rapid development of the manufacturing industry. Additive manufacturing directly forms three-dimensional parts from filaments and powders.

[0034] The main factors affecting surface roughness in additive manufacturing are the size and stability of the molten pool. Different process parameters have varying degrees of influence on the molten pool. The input energy density directly determines the size of the molten pool. For a parameter system with a fixed layer thickness, the energy density depends on the laser power, scanning speed, and scanning spacing. Excessive or insufficient energy density can lead to microscopic defects. The stability of the molten pool is influenced by the combined effects of various parameters. When the laser power is constant, the scanning speed has the greatest impact on molten pool stability. This is because at low scanning speeds, the energy density input to the system is high. Under high energy density radiation, the liquid metal formed by the metal powder will vaporize, causing stirring in the molten pool and increasing defects. As the scanning speed increases, the energy density decreases, the laser energy absorbed by the metal powder decreases, the temperature of the liquid metal decreases, and vaporization and stirring phenomena decrease.

[0035] like Figure 1 As shown, three schemes for the microchannel of the thruster head of the anhydrous hydrazine monocomponent propulsion system of the present invention are illustrated, with three parameters for the spiral configuration: one, two, and three spirals. Additive manufacturing is performed using the following method.

[0036] A method for additive manufacturing of a microchannel for the thruster head of an anhydrous hydrazine monocomponent propulsion system includes the following steps:

[0037] Microchannels were printed with preset wall thickness and outlining parameters of multiple 3D printing devices, and the surface roughness of the corresponding multiple microchannels was tested to determine the optimal outlining parameters.

[0038] The thruster head microchannel is designed in a spiral shape, with the aperture and wall thickness of the spiral thruster head microchannel configured accordingly.

[0039] Adjust the outlining parameters in the 3D printing equipment to the optimal outlining parameters to control the surface roughness after microchannel printing is completed.

[0040] This technical solution improves the manufacturing precision and performance of the thruster head of an anhydrous hydrazine monocomponent propulsion system by optimizing 3D printing parameters and microchannel design. Specifically, printing with preset wall thickness and multiple sets of outlining parameters helps ensure the surface quality of the microchannels, while the spiral-shaped microchannel design enhances hydrodynamic performance to achieve the required flow resistance. The microchannel structure of the head needs a certain degree of curvature or arc to ensure that vibrations and heat generated during propulsion system operation do not damage the channel structure, leading to system failure. Simultaneously, the size and shape of the pipe affect the friction and inertial forces during fluid flow, thus affecting flow resistance. The spiral-shaped bend structure of this invention ensures the required flow resistance.

[0041] The following examples or experiments are provided to illustrate and verify the effectiveness of the technical solution in this embodiment.

[0042] The molten pool exhibits high stability, and the sample surface has good roughness.

[0043] Energy density calculation formula:

[0044] in:

[0045] E represents laser line energy density, measured in joules per millimeter (J / mm²). 3 );

[0046] P represents laser power, measured in watts (W).

[0047] v represents the laser scanning rate, measured in millimeters per second (mm / s);

[0048] h represents the scanning spacing, in millimeters (mm);

[0049] t represents the layer thickness, in millimeters (mm).

[0050] Additive manufacturing printing parameter systems are divided into infill parameter systems and outlining parameter systems. The infill parameter system has a significant impact on the density and performance of the part, while the outlining parameter system mainly affects the surface roughness of the part. Therefore, to adjust the surface roughness, it is necessary to test the roughness under different parameters of the outlining parameter system, and select the power P and scanning speed v in the outlining parameters as variables for roughness control.

[0051] The goal was to achieve unobstructed microchannels with a 0.5mm aperture. Vertical microchannels with designed apertures of 0.4-0.8mm were printed, and the mapping relationship between the designed aperture and the actual aperture was analyzed. However, during the printing process, excessive roughness of the inner wall of the aperture caused blockage in all samples. The following method was used to adjust the roughness of the inner wall of the channel to achieve unobstructed flow.

[0052] Because the inner diameter of the microchannel is too small to be directly measured and evaluated for roughness, a cylindrical structure with an inner diameter of 8mm was selected as a substitute for roughness testing. Both structures have vertically oriented arc-shaped inner walls, and the printed surface roughness can be compared. The testing method follows GB / T 1031-2009 Product Geometric Specification (GPS) Surface Structure Profile Method, Surface Roughness Parameters and Their Values, and GB / T 10610-2009 Product Geometric Specification (GPS) Surface Structure Profile Method, Rules and Methods for Evaluating Surface Structure. Five different locations were selected on the sample to be tested, and the roughness was measured at each location. The average value of the five tests was calculated, which is the roughness value of the sample. The printing parameters and roughness test results are shown in Table 1.

[0053] Table 1 Roughness Test Table

[0054]

[0055] According to the test results, when the laser power is 180W, the sample roughness is better, and the energy density of sample 3-1 (180W-700mm / s) is 42.9J / mm. 3 The lowest sample roughness is Ra3.6.

[0056] Based on the roughness test results, the 3-1 parameter with the best roughness was selected for the aperture test experiment. Simultaneously, the 3-3 parameter was used as a comparison parameter group to test the actual aperture size under different designed aperture sizes and wall thicknesses. Three cross-sections perpendicular to the aperture were cut from the printed microchannel sample. After grinding and polishing the cut sample, the micropore diameter was measured under a light microscope at a measurable distance. The average of the three measurements was taken as the actual aperture size of the micropore.

[0057] The test parameters and results are shown in Table 1. Samples without measured pore diameter values ​​in the table indicate microchannel blockage, making it impossible to measure the true pore diameter.

[0058] Table 2. Aperture Test Results

[0059]

[0060] The test data shows that the actual pore size is smaller than the designed pore size. The amount of pore size reduction varies when different parameters are selected. When using parameter system 3-1, a microchannel sample with an actual pore size of 0.5 mm can be obtained when the designed pore size is 0.7 mm and the wall thickness is 0.5 mm.

[0061] Preferably, the outlining parameters include power P and scanning speed v, with the optimal outlining parameters being power P of 180W and scanning speed v of 700mm / s.

[0062] Preferably, the microchannel is designed with an aperture of 0.6-0.7 mm and a wall thickness of 0.4 mm-0.6 mm to achieve an actual test aperture of 0.5 mm.

[0063] Preferably, when the microchannel at the thruster head is designed as a spiral, a powder cleaning connector is designed at one end, wherein the inner diameter of the distal end of the powder cleaning connector is larger than the inner diameter of the proximal end.

[0064] Based on the same concept, the present invention also provides a method for cleaning additive manufacturing residues in the microchannel of the thruster head of an anhydrous hydrazine monocomponent propulsion system, comprising the following steps:

[0065] The two ends of the microchannel are sealed and connected to a cleaning device, which pumps a high-pressure liquid flow into the microchannel.

[0066] The high-pressure liquid flow is maintained for a preset time to clean the residue in the microchannel.

[0067] Preferably, the liquid stream is deionized water, and the cleaning device pressurizes the deionized water to 3 MPa and then delivers it into the microchannel.

[0068] Preferably, the input end of the microchannel is equipped with a powder cleaning connector, which is cylindrical with an inner diameter of 6mm, a wall thickness of 2.5mm, and a height of 16mm.

[0069] Preferably, after the high-pressure liquid flow continues for a preset time, the water that has passed through the microchannel is collected, and a laser particle size analyzer is used to detect whether there are any residues in the beaker with a size greater than 50 μm. If there are none, it is determined that the residue removal was successful.

[0070] Based on the same concept, the present invention also provides a microchannel additive manufacturing residue cleaning system for anhydrous hydrazine monocomponent propulsion system thruster head, comprising: a water storage device, an inlet pipe, a water pump, and an outlet pipe. The water storage device stores deionized water. The inlet pipe connects the inlet of the water pump to the water storage device. The outlet pipe connects the outlet of the water pump to one end of the microchannel. The cleaning system pumps a high-pressure liquid flow into the microchannel to clean the residue in the microchannel.

[0071] When printing microchannel samples, the first batch of samples was printed as straight tubes without any powder-cleaning connectors. This resulted in complete blockage of the parts after cutting, making it impossible to clean the residual powder inside. The second batch of samples featured a funnel-shaped powder-cleaning connector. Compressed air was used to clean the internal flow channels of the second batch of samples after cutting. The cleaning process revealed that the stability of flow channel patency was insufficient when the designed aperture was less than 0.6 mm. However, when the designed aperture was 0.7 mm, using a parameter system with better surface roughness maintained stable flow, and the actual aperture could be stabilized at around 0.5 mm.

[0072] Therefore, based on the microchannel's operating environment, a 3 MPa liquid flow is required to clean the inside of the microchannel. This necessitates a redesigned cylindrical powder cleaning connector and a cleaning system such as... Figure 2 As shown. Add clean deionized water to the water tank, pressurize the deionized water to 3 MPa using a water pump, and clean the microchannels through the powder cleaning connector. The powder cleaning connector has an inner diameter of 6 mm, a wall thickness of 2.5 mm, and a height of 16 mm. During printing, it is integrated with the microchannels. During cleaning, insert the water outlet pipe into the powder cleaning connector and secure it with clamps. Set the water pressure to 3 MPa, turn on the water pump, and clean the microchannels for 1 minute.

[0073] After cleaning the microchannels using the above method, residue testing is required. Using the same cleaning device, replace the water with clean deionized water, clean the water pump and pipelines, and confirm that there are no residues. Connect the microchannel sample to be tested to the outlet pipeline, and place a transparent beaker at the end of the outlet pipeline. Turn on the water pump and continuously flow water for 10 seconds, collecting the water that has passed through the microchannel in the beaker. Use a laser particle size analyzer to check whether there are any residues larger than 50 μm in the beaker. If no residues are found, the residue removal is considered successful.

[0074] Of course, the flow resistance of the spiral microchannel was also tested. In the experiment, pressure drop was used to characterize the flow resistance of the bend. The relationship between flow resistance and pressure difference can be expressed by Poiseuille's law, i.e., Q = Δp / R, where Q is the fluid flow rate, Δp is the pressure difference, and R is the flow resistance. According to Poiseuille's law, the flow resistance R is directly proportional to the pressure difference Δp; the larger the pressure difference, the greater the flow resistance; the smaller the pressure difference, the smaller the flow resistance. Therefore, there is a direct relationship between flow resistance and pressure difference.

[0075] The experimental setup includes pressure gauges, a water pump, and other equipment. Two pressure gauges are installed on the inlet and outlet water pipes. Deionized water at a pressure of 3 MPa is passed through the pipes, and the water pressure values ​​in the inlet and outlet pipes are measured. The pressure difference ΔP = P 入 -P 出 The calculated pressure difference can characterize the flow resistance.

[0076] The test results show that the flow resistance of the three-spiral bend is above 0.2 MPa, which meets the usage requirements.

[0077] Based on the same concept, the present invention also provides an electronic device, comprising:

[0078] The memory is used to store the processing program;

[0079] The processor, when executing the processing program, implements either the additive manufacturing method for the microchannel of the thruster head of the anhydrous hydrazine monocomponent propulsion system described above, or the residue cleaning method for the additive manufacturing of the microchannel of the thruster head of the anhydrous hydrazine monocomponent propulsion system described above.

[0080] The GH4169 powder used in this invention is supplied by Jiangsu Weilai New Material Technology Co., Ltd., and its powder particle size is 15-53 μm. The powder needs to be dried before use. The dried powder is then loaded into the additive manufacturing equipment. Argon gas protection is required throughout the printing process to ensure an oxygen content below 100 ppm, and the substrate preheating temperature is 200°C.

[0081] Based on the same concept, the present invention also provides a readable storage medium storing a processing program, which, when executed by a processor, implements the additive manufacturing method for the microfluidic head of the thruster of the anhydrous hydrazine monocomponent propulsion system described in any one of the above claims, or the residue cleaning method for the additive manufacturing of the microfluidic head of the thruster of the anhydrous hydrazine monocomponent propulsion system described in any one of the above claims.

[0082] The additive manufacturing method for the microfluidic channel of the thruster head of the anhydrous hydrazine monocomponent propulsion system described in any of the above-mentioned methods, or the residue cleaning method for the additive manufacturing of the microfluidic channel of the thruster head of the anhydrous hydrazine monocomponent propulsion system described in any of the above-mentioned methods, if implemented in the form of program instructions and sold or used as an independent product, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this embodiment, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in software. This computer software is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this disclosure. The aforementioned storage medium includes various media capable of storing program code, such as a USB flash drive, a portable hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0083] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific identification content executed by the system and device described above can be referred to the corresponding process in the foregoing method embodiments.

[0084] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, if these changes fall within the scope of the claims of the present invention and their equivalents, they shall still fall within the protection scope of the present invention.

Claims

1. A method for additive manufacturing of a microchannel in the thruster head of an anhydrous hydrazine monocomponent propulsion system, characterized in that, Includes the following steps: Microchannels were printed with preset wall thickness and outlining parameters of multiple 3D printing devices, and the surface roughness of the corresponding multiple microchannels was tested to determine the optimal outlining parameters. The thruster head microchannel is designed in a spiral shape, with the aperture and wall thickness of the spiral thruster head microchannel configured accordingly. Adjust the outlining parameters in the 3D printing equipment to the optimal outlining parameters to control the surface roughness after microchannel printing is completed.

2. The additive manufacturing method for the microchannel of the thruster head of the anhydrous hydrazine monocomponent propulsion system according to claim 1, characterized in that, The outlining parameters include power P and scanning speed v. The optimal outlining parameters are power P of 180W and scanning speed v of 700mm / s.

3. The additive manufacturing method for the microchannel of the thruster head of the anhydrous hydrazine monocomponent propulsion system according to claim 1, characterized in that, The microchannel is designed with an aperture of 0.6-0.7 mm and a wall thickness of 0.4 mm-0.6 mm to achieve an actual test aperture of 0.5 mm.

4. The additive manufacturing method for the microchannel of the thruster head of the anhydrous hydrazine monocomponent propulsion system according to claim 1, characterized in that, When the microchannel of the thruster head is designed as a spiral, a powder cleaning connector is designed at one end, and the inner diameter of the far end of the powder cleaning connector is larger than the inner diameter of the near end.

5. A method for cleaning additive manufacturing residues in the microchannel of a thruster head of an anhydrous hydrazine monocomponent propulsion system, characterized in that, Includes the following steps: The two ends of the microchannel are sealed and connected to a cleaning device, which pumps a high-pressure liquid flow into the microchannel. The high-pressure liquid flow is maintained for a preset time to clean the residue in the microchannel.

6. The method for cleaning additive manufacturing residues in the microchannel of the thruster head of an anhydrous hydrazine monocomponent propulsion system according to claim 1, characterized in that, The liquid stream is deionized water, and the cleaning device pressurizes the deionized water to 3 MPa and then delivers it into the microchannel.

7. The method for cleaning additive manufacturing residues in the microchannel of the thruster head of an anhydrous hydrazine monocomponent propulsion system according to claim 1, characterized in that, The input end of the microchannel is equipped with a powder cleaning connector, which is cylindrical with an inner diameter of 6mm, a wall thickness of 2.5mm, and a height of 16mm.

8. The method for cleaning residues from microchannel additive manufacturing in the thruster head of an anhydrous hydrazine monocomponent propulsion system according to claim 1, characterized in that, After the high-pressure liquid flow continues for a preset time, the water that has passed through the microchannel is collected, and a laser particle size analyzer is used to detect whether there are any residues in the beaker with a size greater than 50 μm. If there are none, it is determined that the residue has been successfully cleaned.

9. A microchannel additive manufacturing residue cleaning system for the thruster head of an anhydrous hydrazine monocomponent propulsion system, characterized in that, include: The system includes a water storage device, an inlet pipe, a water pump, and an outlet pipe. The water storage device stores deionized water. The inlet pipe connects the inlet of the water pump to the water storage device. The outlet pipe connects the outlet of the water pump to one end of the microchannel. The cleaning system pumps a high-pressure liquid flow into the microchannel to clean the residue in the microchannel.

10. An electronic device, characterized in that, include: The memory is used to store the processing program; The processor, when executing the processing program, implements the additive manufacturing method for the microchannel of the thruster head of the anhydrous hydrazine monocomponent propulsion system as described in any one of claims 1 to 4, or the method for cleaning residues from the additive manufacturing of the microchannel of the thruster head of the anhydrous hydrazine monocomponent propulsion system as described in any one of claims 5 to 8.

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