43 results about "Propellant tank" patented technology

The invention relates to a welding seam reinforcing structure for a stainless steel storage tank, and belongs to the technical field of aerospace carrier propellant storage tank structures. A first box bottom, a first short shell, a cylinder section, a second short shell and a second box bottom; the first box bottom and the second box bottom are each of a hemispherical shell structure. The first short shell, the second short shell and the barrel section are all of barrel section structures; the first short shell, the barrel section and the second short shell are horizontally and coaxially butted in sequence; the first box bottom is coaxially mounted at the axial outer end of the first short shell; the second box bottom is coaxially mounted at the axial outer end of the second short shell; the opening end of the first box bottom extends into the first short shell, and the outer wall of the first box bottom is in butt joint with the inner wall of the first short shell. The opening end of the second box bottom extends into the second short shell, and the outer wall of the second box bottom is in butt joint with the inner wall of the second short shell. The problem that the welding performance of reinforcing materials cannot be weakened through partition thickness design is solved, and the purposes of high performance, low cost manufacturing and the like of the stainless steel storage box are achieved.

The utility model discloses an ignition agent filling or discharging tool for an ignition agent storage box, and belongs to the technical field of ignition agent filling or discharging of ignition agent storage boxes. Comprising two fixing nuts, two threaded sleeves, two first check rings, two first sealing rings, two second check rings, two second sealing rings, two rotating shafts, two shells, two outer sleeve nuts and a storage box, the fixing nuts are in threaded connection with one ends of the rotating shafts, one ends of the fixing nuts are in lap joint with the threaded sleeves, the rotating shafts are sleeved with the threaded sleeves, and the storage box is connected with the outer sleeve nuts. The screw sleeve is in threaded connection outside the shell; according to the utility model, the ignition agent storage tank can be filled or discharged in an aerobic environment, the problem of high skill requirements on operators is solved, and meanwhile, compared with the traditional technology, the operation efficiency is greatly improved, the safety and reliability of the operation process are ensured, the operation is simple, and the practicability is high. And safety accidents caused by combustion of the ignition agent in contact with the air are avoided.

The present application relates to a kind of weld reinforcement structure for stainless steel tank, belong to aerospace vehicle propellant tank structure technical field;First tank bottom, first short shell, barrel section, second short shell and second tank bottom;Wherein, first tank bottom and second tank bottom are hemispherical shell structure;First short shell, second short shell, barrel section are barrel section structure;First short shell, barrel section and second short shell are in turn horizontal coaxial butt joint;First tank bottom is coaxially installed at the axial outer end of first short shell;Second tank bottom is coaxially installed at the axial outer end of second short shell;The open end of first tank bottom is inserted into first short shell, and the outer wall of first tank bottom is butt joint with the inner wall of first short shell;The open end of second tank bottom is inserted into second short shell, and the outer wall of second tank bottom is butt joint with the inner wall of second short shell;The present application solves the problem that the welding performance of reinforcing material cannot be reinforced by partition thickness design, realizes the purposes such as high performance, low cost manufacturing of stainless steel tank.

The invention concerns a spacecraft propellant tank designed for storing and supplying fuel to the propulsion system, as well as its application method, which is related to space technology and particularly to the design of tanks for storing liquid propellants within rocket engines. The tank in question comprises a body featuring at least one convex edge that creates a corner capillary and an intake port positioned on one of these convex edges. Additionally, the tank's interior surface is treated to be hydrophilic. The objective of this invention is to develop a spacecraft propellant tank characterized by its lightweight and straightforward design. It facilitates the creation of various propellant tank shapes while minimizing the quantity of internal components that reduce useful volume. It also ensures consistent and reliable functionality of the propellant system with continuous supply of propellant to the intake port, even in the absence of gravity and during multiple activations of the propulsion system. The claimed invention achieves its objective by implementing technical results that include enhancing the efficiency of propellant supply within the tank to the intake port, improving reliability, augmenting the useful internal volume, and offering a variety of tank shapes. The stated objectives are met in particular through the hydrophilic properties of the propellant tank's inner surface, the design of the propellant tank shape featuring at least one convex edge that forms a corner capillary, and positioning of the intake port on one of the convex edges that forms the corner capillary. The application method for the spacecraft propellant tank involves initially filling the tank with liquid propellant and pressurizing gas through the intake port prior to spacecraft launch. Subsequently, once the spacecraft is in orbit, propellant is conveyed from the tank to the propulsion system through the intake port. The movement of liquid propellant towards the intake port is facilitated by the pressure of the pressurizing gas and a localized pressure reduction generated during propellant discharge. This reduction occurs in the corner capillary near the intake port relative to the pressure of the propellant in other sections of at least one corner capillary, thus establishing a flow of propellant through the corner capillaries towards the intake port area.

The application discloses a low-temperature liquid rocket engine immersion precooling system and method, and belongs to the technical field of liquid rocket engine precooling, which comprises a low-temperature propellant tank, a conveying pipeline, a low-temperature pump, a post-pump pipeline and low-temperature valves; the application only utilizes necessary heat exchange components of the engine to realize immersion precooling, and does not need to set a discharge valve, a discharge pipeline, a reflux pipeline and a reflux valve, so that the system structure is greatly simplified; the precooling process does not need propellant discharge, effectively reduces the propellant consumption, and improves the rocket carrying capacity; in combination with an overall layout of an inclined downward direction, a guide inner wall and an inclined upward design of the post-pump pipeline, a continuous exhaust passage is constructed, gas is ensured to smoothly float up, and the precooling efficiency is greatly improved; by limiting the relative relationship between the inclination degrees of the guide inner wall and the post-pump pipeline, the gas floating rate can be flexibly optimized according to different working conditions, the best balance between the exhaust efficiency and the flow stability is realized, and the system working condition adaptability and the precooling effect controllability are remarkably improved.

A number of techniques, structures, and materials for thermally insulating a cryogenic propellant tank barrel section are presented. Thermal insulation for a tank, such as tanks for use in space flight missions, may be a dual wall vacuum jacket system where one wall is the propellant tank wall and the other wall is a metallic foil that is welded to portions of the propellant tank wall. The metallic foil may act as a vapor barrier and a vacuum seal. A structural and breathable insulation that is durable and functional in a range from cold to relatively high temperatures may be used to maintain a standoff distance between the two walls. The volume between the propellant tank wall and the metallic foil may be purged with a gas that has a liquefaction temperature greater than that of the cryogenic propellant that will be in the propellant tank during operations.

This invention provides a multi-channel refueling system for measuring the volume of a launch vehicle's propellant tank, comprising: a single-channel refueling system and a newly developed data acquisition and control system; the single-channel refueling system includes a test station and a flow meter; the newly developed data acquisition and control system includes a pulse distributor, a PLC module, an industrial computer, and control components; the pulse distributor is connected to the test station, the flow meter, and the PLC module respectively; the PLC module is connected to the industrial computer and the control components respectively. This invention possesses multi-channel refueling capability and multi-channel test data processing capability, achieving a several-fold increase in the efficiency of launch vehicle propellant tank volume measurement.

This invention relates to the field of aerospace propulsion technology, specifically disclosing a high-frequency induction heating space propulsion system and method. The system includes a Laval nozzle, a high-frequency induction heating chamber, a flange joint, and a working propellant delivery pipeline. The high-frequency induction heating chamber includes an induction coil, a heating chamber shell, and a metal workpiece to be heated. The induction coil is wound around the outside of the heating chamber shell. The induction coil generates a high-frequency alternating magnetic field powered by a high-frequency AC power supply. This magnetic field induces eddy currents in the metal workpiece, thereby heating the heating chamber shell. The working propellant delivery pipeline injects propellant from the propellant tank into the high-frequency induction heating chamber for heating. The resulting high-temperature, high-pressure gas is ejected from the Laval nozzle, generating thrust. Utilizing the principle of electromagnetic induction, eddy currents are generated inside the thruster shell, directly heating the propellant, offering advantages such as high heating efficiency and fast response speed.

This utility model relates to a satellite electric propulsion system, addressing the problems of high cost, poor control precision, and low efficiency and reliability of existing chemical thrusters for micro and nanosatellites, as well as the issues of low efficiency and low reliability of resistance-heated thrusters. The system includes a propellant tank, a power supply and control module, a dual-path pressure regulation module, and a dual-thrust module. The propellant tank uses a full TC4 titanium alloy spherical structure to store liquid ammonia. The power supply and control module controls the high-voltage arc heating of the working fluid via a CAN bus. The dual-path pressure regulation module achieves redundant pressure reduction through solenoid valves, preheaters, and pressure reducing valves. The dual thrusters are arranged vertically at their centers of mass, providing mutual cold backup. This design reduces size and weight through modular integration, improves electrothermal conversion efficiency, orbit climbing mission success rate, and working fluid utilization efficiency, effectively solving the technical bottlenecks of existing propulsion systems and is suitable for high-precision orbit control of micro and nanosatellites.

Thermal protection systems for aerospace vehicles, such as hypersonic vehicles or space vehicles, are disclosed herein. In some embodiments, the disclosed thermal protection systems can be used to protect propellant tanks (e.g., composite propellant tanks) and vehicle primary structures (e.g., composite primary structures) from exceeding upper design temperature limits during vehicle ascent, reentry into Earth's atmosphere, and / or high velocity flight through an atmosphere. In some embodiments, a thermal protection system can include a framework of elongated composite members forming a plurality of cells. One or more layers of insulation material such as aerogel can be positioned in each of the cells. The cells can be covered by an external skin of the vehicle. In some embodiments, the framework is attached to a propellant tank and the insulation material is in contact with the external surfaced of the propellant tank.

A debris removal satellite includes a capture device, a thruster of a chemical propulsion method, and a propellant tank to store chemical fuel. A solar array wing is operable in an orbit at an orbital altitude higher than a congested orbit region congested with satellites forming a satellite constellation. The debris removal satellite is built in advance for future use as a satellite to be launched, and when a debris intrusion alarm to give a warning about intrusion of debris into the congested orbit region is issued, propellant is loaded into the propellant tank and the debris removal satellite is launched by a rocket built in advance for future use as a launch rocket. The debris removal satellite captures capture-target debris at an orbital altitude higher than the congested orbit region, and operates a propulsion device with the capture-target debris being captured.

A debris removal satellite includes a capture device, a thruster of a chemical propulsion method, and a propellant tank to store chemical fuel. A solar array wing is operable in an orbit at an orbital altitude higher than a congested orbit region congested with satellites forming a satellite constellation. The debris removal satellite is built in advance for future use as a satellite to be launched, and when a debris intrusion alarm to give a warning about intrusion of debris into the congested orbit region is issued, propellant is loaded into the propellant tank and the debris removal satellite is launched by a rocket built in advance for future use as a launch rocket. The debris removal satellite captures capture-target debris at an orbital altitude higher than the congested orbit region, and operates a propulsion device with the capture-target debris being captured.

This invention provides a rocket propellant tank bracket positioning system and method based on database and machine vision, including the following steps: S1: establishing a database of external brackets for various propellant tank models; S2: retrieving propellant tank data from the external bracket database according to the propellant tank model; S3: the automated positioning system for the external brackets corrects the downward displacement of each position of the propellant tank model under gravity in the external bracket model database based on measurement results; S4: rotating the reference for the external bracket positioning and assembly of the propellant tank to a suitable position; S5: generating assembly and marking schemes for each external bracket based on machine vision results; S6: operators welding each bracket sequentially at the bracket welding station according to the marked positions determined by each reference; and S7: grinding away the weld seams. This application features rapid positioning technology that enables one-time accurate marking of batch propellant tank brackets, reducing repeated adjustments and improving production line consistency.

A thruster includes a current loop, a magnetic circuit within the current loop, a channel, a propellant reservoir and an ejection outlet. The channel forms an ejection path from an output of the propellant reservoir to the ejection outlet. The current loop is driven by a tuned current density based on at least a selected propellant. The selected propellant is ejected down the channel due to an applied electric field.

A method and apparatus for measuring a level for calculating a flow of a propellant tank are provided. The method of measuring a level for calculating a flow of a propellant tank includes, in response to an instruction to measure a level in a propellant tank storing a liquid fuel, generating propagated power for level measurement at a specified generation intensity inside the propellant tank through a transmission antenna, receiving the propagated power for level measurement passing through the liquid fuel through a reception antenna, calculating a degree of attenuation between the generation intensity and a reception intensity of the propagated power for level measurement, and measuring a height level of the liquid fuel by considering the degree of attenuation.

This application provides an intelligent measurement system and method for rocket propellant tank volume. The system includes: a nitrogen tank, a manual ball valve, a delivery pump, a check valve, a gas-locked ball valve, a pressure sensor, a pressure gauge, a pneumatic ball valve, a recovery pump, an electric regulating valve, a propellant tank, a safety valve, a standard container, a first temperature sensor, and a second temperature sensor. The nitrogen tank, delivery pump, recovery pump, standard container, and the propellant tank under test constitute the gas path execution unit. The intelligent control center includes an adaptive predictive control module and a multi-parameter dynamic inversion processing module. The intelligent measurement system and method for rocket propellant tank volume provided by this invention eliminates the need for manual intervention during the entire measurement process, resulting in high measurement efficiency and ensuring intelligent measurement of rocket propellant tank volume through automatic output of reliable results.

The invention belongs to the technical field of spaceflight equipment, and particularly relates to a propellant storage tank and application thereof to a spaceflight vehicle. The invention provides a propellant storage box, the propellant storage box comprises a storage box main body and a bottom-sharing separation layer, the side edge of the bottom-sharing separation layer is connected with the side wall of the storage box main body, and the bottom-sharing separation layer is used for separating the storage box main body in the horizontal direction. The invention further provides an application of the propellant storage tank in a space launch vehicle. In the technical scheme provided by the invention, the common-bottom separation layer replaces an inter-tank section structure, so that the overall weight of the propellant storage tank can be effectively reduced; during preparation, only the common-bottom separation layer needs to be connected with the side wall of the storage tank main body, so that the preparation process is simple and convenient, and the cost is low; the technical defects that in the prior art, a common-bottom propellant storage box is large in weight, high in preparation cost and complex in preparation process are overcome.

This invention provides a 3-meter-class aerospace launch vehicle propellant tank bottom local heating and forming device, including a positioning unit, a heating unit, a forming mold unit, and a servo control system. The positioning unit automatically aligns the part with a reference line and rotates and flips the part according to set values, thereby bringing the area to be heated and formed to the lowest position of the part, and records the movement sequence. The heating unit converts electrical energy into heat energy and transfers the heat energy to the area to be heated on the part through efficient conduction, with a temperature detection device serving as the control signal for the electrical energy to heat energy conversion. The forming mold unit receives the temperature signal measured by the heating unit and begins to move, controlling the displacement to the set value to complete the forming process, and then sends a control signal to the positioning unit to bring the part to zero. This invention effectively improves the forming limit of the material, optimizes the forming process of the tank bottom parts, significantly shortens the tank bottom manufacturing cycle, and improves the product quality consistency of the tank bottom parts.

The invention relates to the technical field of spacecraft propulsion systems, in particular to a propellant storage tank. The propellant storage box comprises a box body and a propellant management device, the box body is provided with an inner cavity, an air port and a liquid outlet, the air port and the liquid outlet are both communicated with the inner cavity, the air port is formed in the top end of the box body, the liquid outlet is formed in the bottom end of the box body, and the propellant management device is arranged in the inner cavity; the propellant management device comprises a liquid accumulator and a flow guide plate connected to the liquid accumulator, the liquid accumulator is arranged at the liquid outlet, the flow guide plate extends along the inner wall face of the box body, a flow guide gap is formed between the flow guide plate and the inner wall face of the box body, and the flow guide gap is gradually reduced from the top end to the bottom end of the box body. The invention provides a propellant storage tank to relieve the technical problem that in the prior art, flow guide of a flow guide plate on liquid is difficult to balance the liquid storage capacity and the transmission capacity of the liquid.

This invention provides a misalignment test method for evaluating the strength of stainless steel welds in launch vehicles, comprising: designing and preparing tensile test specimens with a weld misalignment amount equal to a set value of the plate thickness, based on the plate thickness of the stainless steel propellant tank weld to be tested in the launch vehicle; performing metallographic examination on the weld area of ​​the prepared test specimens to obtain a metallographic image of the weld cross-section, and screening test specimens that meet the set conditions based on the metallographic image; installing the screened test specimens on a tensile testing machine, constraining one end of the test specimen, and applying a tensile load to the other end of the test specimen until the test specimen fails, maintaining the test environment temperature at a set temperature during the tensile test; collecting the stress-strain curve of the failed test specimen, and evaluating the weld strength of the test specimen based on the stress-strain curve. By effectively identifying the risk of unstable strength in stainless steel welds, the method aims to improve the structural safety of the launch vehicle propellant tank.

A pressurization method for increasing a pressure within a propellant tank containing hydrogen peroxide H2O2. The pressurization method includes irradiating at least some of the hydrogen peroxide H2O2 with ultraviolet light emitted by at least one ultraviolet light source. With the UV light, a photolysis is actively provoked which causes the irradiated hydrogen peroxide H2O2 to at least partially decompose into water H2O and gaseous oxygen O2. Also a filling method for at least partially filling a receiving propellant tank with the pressurization method, a tank assembly, a filling system, and a spacecraft.

This invention provides a method and system for assessing the adaptability of a satellite to the mechanical environment during long-distance transportation after propellant loading, belonging to the field of spacecraft mechanical environment engineering technology. This method aims to solve the challenge of assessing the structural safety and leakage risk of propellant-loaded satellites during long-distance transportation under the coupling of static pressure stress within the propellant tank and dynamic stress during transport. The method includes: establishing a model of the satellite and packaging system; defining the transportation mechanical environment conditions; analyzing and calculating random vibration fatigue strength and impact strength, predicting propellant leakage rate, and conducting a comprehensive assessment. This method employs the mean stress correction theory and the quasi-static transformation method to solve the coupling problem of static and dynamic stresses in fatigue analysis and impact strength verification, respectively, and predicts leakage risk by comparing acceleration response with ground test data. This invention can comprehensively assess the safety of propellant-loaded satellite transportation and supports the optimization of spacecraft development processes.

The invention relates to the technical field of airspace engines, in particular to a self-pressurization type valve-spraying integrated engine which comprises 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, an electromagnetic valve and a combustor assembly. In the working process of the engine, starting and shutdown of the engine are controlled only by controlling on-off of high-pressure gas through the electromagnetic valve, and an engine supply system does not need to carry an additional high-pressure control gas cylinder; and meanwhile, the pressure of a propellant storage tank of the engine can be utilized to finish extrusion and injection of the oxidant and the fuel, so that the overall complexity and the structural mass of the engine are reduced.

The invention relates to the technical field of propellant storage tanks, in particular to an additive manufacturing special-shaped propellant storage tank. The embodiment of the invention provides an additive manufacturing special-shaped propellant storage tank which comprises a mesh, a mesh pressing plate and a special-shaped structural part obtained through the additive manufacturing technology and comprises an upper shell, a lower shell and a liquid accumulator. The lower shell comprises a liquid outlet, a support plate is arranged above the liquid outlet, the mesh is paved on the support plate above the liquid outlet, the mesh pressing plate with a hollow structure is pressed on the mesh and is welded and fixed through electron beams, the liquid accumulator is connected above the mesh pressing plate, and the liquid accumulator is connected above the mesh pressing plate. The liquid accumulator and the four flow guide plates in the lower shell are fixed through spot welding, and the upper shell and the lower shell are connected through electron beam welding. The embodiment of the invention provides an additive manufacturing special-shaped propellant storage tank which can be used for preparing a propellant storage tank with a complex structure in a low-cost and short-period manner.

A reusable launch vehicle comprising auxiliary tanks for non-ascent burns, such as orbital maneuver burns, reorientation burns, deorbit burns, or landing burns, and / or power generation. The auxiliary tanks may provide propellants for an orbital maneuvering system, an orbital reaction control system, a reentry reaction control system, and / or a power generation system. The tanks are configured to maintain cryogenic properties of auxiliary fuel and auxiliary oxidizer for the duration of the mission. An auxiliary fuel tank, a main fuel tank, an auxiliary oxidizer tank, and a main oxidizer tank may have various relative positions with respect to each other within the launch vehicle. The auxiliary fuel tank and auxiliary oxidizer tank may comprise insulation to further insulate the cryogenic fluids.

This invention provides a method for analyzing the on-orbit utilization of propellant in a spacecraft surface tension propellant tank, under conditions where pressurized gas cannot be introduced by the tank management device. The method includes: obtaining the residual propellant dose V attached to the inner wall of the tank. tc ; Obtain the residual propulsion dose V in the pipeline gc ; Obtain the propellant dose V in the tank management device tg ; Obtain the safety margin V for propellant in spacecraft design a Obtain the total volume V of the storage tank. t According to the residual propellant dose V on the inner wall of the tank tc Residual propellant dose V in pipeline gc Propulsion dose V in tank management device tg Spacecraft design with a safety margin for propellant V a Total volume V of the storage tank t The propellant utilization rate was determined to be 1-(V). tc +V gc +V tg +V a ) / V t By integrating the working mechanism of the surface tension tank, the propellant consumption process, the overall load conditions, and the on-orbit mission profile, accurate measurement of the on-orbit utilization rate of propellant, which is less affected by on-orbit environmental factors, can be achieved.

The invention provides a cleanliness inspection method and system for an additive manufacturing propellant storage box, and relates to the technical field of additive manufacturing quality detection and nondestructive detection.The method comprises the steps that concentration change data of pollutants in the storage box are obtained in real time in the manufacturing process, meanwhile, pulse laser is used for exciting ultrasonic waves on the surface of the storage box, and the cleanliness of the pollutants in the storage box is detected; acoustic signals in the material are collected by adopting a laser interference measurement technology. And carrying out time-frequency analysis on the acoustic signal and extracting voiceprint features, and recognizing gas sudden change and acoustic abnormal events in combination with concentration data. And constructing a space-time correlation model based on a graph neural network, realizing space-time matching positioning of a pollution event and a defect signal, finally determining an affected area through repeated inspection, and generating an inspection result for representing the cleanliness level in the propellant storage tank. According to the invention, the precision and real-time performance of cooperative detection of internal defects and pollutants in the additive manufacturing process are improved.

This invention provides a multi-engine parallel engine rack structure for a launch vehicle, comprising: a connecting ring frame connecting the upper and lower sections of the launch vehicle; a first force transmission frame connected to the connecting ring frame, the center of gravity of the first force transmission frame being located on the axis of the connecting ring frame; a first engine mounting base coaxially arranged with the connecting ring frame and connected to the first force transmission frame; multiple second force transmission frames connected to the connecting ring frame and the first force transmission frame, the multiple second force transmission frames being evenly distributed circumferentially with the axis of the connecting ring frame as a reference; and multiple second engine mounting bases, each of the multiple second engine mounting bases being connected to the multiple second force transmission frames. The solution of this invention transmits the thrust of multiple engines to the connecting ring frame through the first force transmission frame and multiple second force transmission frames, without stress on the propellant tank, eliminating the need for propellant tank reinforcement design, ensuring the thrust effect of the multiple engines of the launch vehicle, and contributing to improving the launch vehicle's carrying capacity.

This invention provides a cross-synchronous pressurization gas supply system and its usage method for spacecraft, relating to the field of space propulsion technology. The system includes a cross-synchronous pressurization gas supply system, through which the propellant tank is synchronously pressurized. The system comprises gas cylinders, a main system, and a secondary system, with parallel gas cylinders providing cross-synchronous pressurization to the propellant tank via either the main or secondary system. This invention achieves synchronous pressurization of the propellant tank through the cross-synchronous pressurization gas supply system, and controls the connection and disconnection between gas cylinders via a fifth solenoid valve. For spacecraft with high requirements for pressurization synchronization, such as propulsion systems using common-bottom propellant tanks, this system effectively avoids the problem of pressure differential exceeding limits and common-bottom rupture caused by asynchronous pressurization of the oxygen and fuel components in the propellant tank. The redundant backup design fully ensures the reliability of the propellant tank pressurization.