43results about How to "Achieve thermal protection" patented technology

The invention discloses a method for reducing heat of a hypersonic velocity aircraft based on shock wave control, and relates to the fields of flowing control of hydromechanics and plasma physical application. The method comprises the following steps of using a high-pressure gas source gas spraying device or a plasma synthesizing flow jetting device to control shock waves in a hypersonic velocity aircraft flow field, lifting the leading head shock wave of the hypersonic velocity aircraft, and eliminating the leading shock of side wings, or producing reciprocating swinging, so as to eliminate or control the shock wave disturbance area, reduce the heat flow in key periods and key areas, and realize the heat protection of the aircraft. The method has the advantages that by adopting the outer flow field control type, the root produced by high heat flow is prevented or controlled, and the heat reducing and protection can be realized by reducing the production of heat flow in source; compared with the traditional method of performing passive heat protection on the cause of high heat flow, the material revolution is realized, and a new active heat protection control technique is realized.

The invention relates to magnetic composite microspheres, and a preparation method and application thereof, belonging to the technical field of chemical material preparation. The preparation method comprises the following steps: synthesizing Fe3O4@SiO2-MPS (modified polystyrene); mixing, adding acetonitrile, carrying out ultrasonic dispersion, adding isopropyl acrylamide, glycidyl methacrylate, N,N'-methylene-bis acrylamide and azodiisobutyronitrile, mixing, and carrying out oil-bath heating; distilling to obtain part of acetonitrile, and stopping the reaction; carrying out magnetic separation on the obtained, and repeatedly washing with ethanol and water; and drying in a vacuum drying oven to obtain the product. The product is used for cellulase immobilization. The synthesized magnetic composite microspheres have superparamagnetism, can enhance the enzyme activity restorability and heat stability when being used for cellulase immobilization, and implements thermal protection on the cellulase.

The invention provides a low-speed cooling water thermal protection device and relates to the technical field of aircraft heat shielding ground testing. The low-speed cooling water thermal protection device comprises a water collecting cavity, a water inlet, a water outlet and water cooling channels. The water collecting cavity is of a hollow cylindrical structure. The water inlet is fixedly installed at one end of the outer wall of the water collecting cavity, and the water outlet is fixedly installed at the other end of the outer wall of the water collecting cavity. The multiple adjacent water cooling channels are arranged between the outer wall and the inner wall of the water collecting cavity in the axial direction of the water collecting cavity. Channel connection of cooling water of the water inlet and cooling water of the water outlet is achieved through the water cooling channels. By the adoption of the subcooled boiling design method, long-term thermal protection on a diffuser in the megawatt-grade thermal environment is achieved at the low flow rate and small pressure, and normal operation of a high-temperature hot gas flow wind tunnel is guaranteed; and long-term thermal protection on the diffuser in the high-temperature thermal structure wing tunnel is achieved, protection on the diffuser in the megawatt-grade thermal environment can be achieved at the low flow rate and small pressure, the difficulty of structural design is lowered, the requirement for cooling water amount is reduced, and normal operation of the gas flow wind tunnel is guaranteed.

The invention discloses a fabricated building structure insulation board, and belongs to the technical field of fabricated constructions. According to the fabricated building structure insulation board, raw materials of an existing insulation board are improved, magnet blocks are inlaid in the surface of the insulation board in a staggered mode, and flame-retardant balls are externally embedded in the surface of the insulation board, so when the insulation board encounters open fire, the externally-embedded flame-retardant balls sense the high temperature firstly and then expand gradually; the fire extinguishing material is released to extinguish open fire until the fire extinguishing material expands to a certain degree and then explodes; once the fire is large and cannot be extinguished, the externally-embedded flame-retardant balls can be further disintegrated and release magnetic flame-retardant materials, and then the magnetic flame-retardant materials are transferred out of the externally-embedded flame-retardant balls and cover the surface of the heat preservation plate under the magnetic attraction effect of the magnet blocks, and an integral fireproof layer is formed to carry out flame-retardant protection on the insulation board; compared with an existing insulation board, the fireproof and flame-retardant effects of the insulation board are remarkably improved, and the application of the insulation board in the field of prefabricated buildings is effectively expanded.

The invention discloses a fuel cell feeding system for a rocket engine, belongs to the technical field of rocket engines, and solves the problems that existing feeding systems for rocket engines cannot meet requirements for shorter development period and higher flexibility of small carrier rockets. An inlet of an electric fuel pump communicates with a fuel tank, an outlet of the electric fuel pumpcommunicates with inlets of multiple cooling channels, and an outlet of each cooling channel communicates with an anode inlet of a solid oxide fuel cell and a fuel injector; and an inlet of an electric oxidizing agent pump communicates with an oxidizing agent tank, an outlet of the electric oxidizing agent pump communicates with a cathode inlet of the solid oxide fuel cell and an oxidizing agentinjector separately, the solid oxide fuel cell is electrically connected with an electric energy control distribution system, the electric energy control distribution system is electrically connectedwith a storage battery and a motor separately, and the motor, the electric oxidizing agent pump and the electric fuel pump are coaxially and fixedly connected.

The invention provides an equalization circuit, a design method thereof and a battery management system, and the equalization circuit comprises a control sub-circuit which comprises a control end, a first end and a second end, wherein the control end is used for accessing a control signal, and the control signal is used for controlling the conduction state between the first end and the second end;a first series branch which comprises a first equalizing resistor and a first thermistor which are connected in series, wherein the first series branch is connected between the first end and the signal input end of a first battery monomer in the battery module in series; and a second series branch which comprises a second equalizing resistor and a second thermistor which are connected in series,wherein the second series branch is connected between the second end and the signal input end of a second battery monomer in the battery module in series. Thus, if the current of the series branch isincreased to cause the temperature rise of the equalizing resistor, the resistance value of the thermistor is quickly increased along with the temperature rise so that the current in the series branch is reduced, the temperature of the equalizing resistor is also reduced, and the thermal protection of the battery module is realized.

The invention relates to a pintle injector and a liquid rocket engine provided with the same. The pintle injector comprises a pintle and a rotational flow piece, wherein the pintle is provided with aninternal flow channel extending in the axial direction of the pintle, one end of the pintle is a head used for extending into a combustion chamber, the head is of an inwards-concave structure sunkentowards the interior of the pintle, and a mounting hole communicating with the internal flow channel is formed in the deepest position of the head; and the rotational flow piece is arranged in the mounting hole and is provided with a flow guide channel communicating with the inner flow channel, and the flow guide channel is used for enabling a propellant in the inner flow channel to be attached tothe outer wall of the head to flow after the propellant passes through the flow guide channel. According to the pintle injector and the liquid rocket engine, the propellant in the inner flow channelcan be attached to the outer wall of the head of the pintle to flow under the action of the rotational flow piece, the head of the pintle is isolated from high-temperature fuel gas, and thermal protection of the head of the pintle is achieved.

The invention provides a ramjet with an adjustable flow channel and a design and adjustment method. The ramjet comprises an air inlet channel, a combustion chamber and a spray pipe, wherein a fixed partition plate is mounted in the combustion chamber and divides a flow channel of the combustion chamber into a shared flow channel and a second flow channel; an adjustable component is mounted on one side of a compression surface of the air inlet channel and can rotate in the air inlet channel, and the flow channel of the ramjet is changed by adjusting the position of the adjustable component. The fixed partition plate is mounted in the combustion chamber, the adjustable component is mounted in the air inlet channel, the flow channel of the ramjet is adjustable by adjusting the position of the adjustable component, and the effect of adjusting an air inlet channel throat and a combustion chamber heat throat simultaneously can be achieved without arrangement of a spray pipe adjustable device.

The invention discloses application of a D-34 protein and a heat protection agent with the D-34 protein. The D-34 protein is used as a heat stabilizer for one or more of proteins, enzymes, antibodiesand cells. The heat protection agent is used for conducting heat protection on one or more of the proteins, enzymes, antibodies and cells, and contains the D-34 protein. The D-34 protein and the heatprotection agent can effectively protect the heat stability of the target proteins, enzymes, antibodies and cells, accordingly, the biological activity of the target proteins, enzymes and antibodies is effectively guaranteed, gathering of the target proteins, enzymes and antibodies is avoided, and the effect of protecting the multiple kinds of proteins, enzymes and antibodies is realized. In thisway, the D-34 protein and the heat protection agent can improve the heat resistance of the cells, and guarantee the activity of the cells in a relatively high temperature environment.

The invention relates to a high-heat-density high-power solid-state emission module radiating device. According to the radiating device, heat sink plates with high thermal conductivity are used to disperse the heat density, then, the heat is transferred to a radiator and an air duct by a heat pipe, and finally, the heat is discharged by a high-power fan. Modules in different bands are installed on different radiating plates, a common air duct is formed at the radiating teeth, the heat of the radiating teeth is conducted, and therefore, the radiating efficiency of the radiator when the modules work in a time-sharing mode is increased. Temperature control plates are added in the corresponding portions of the heat sink plates to realize thermal production during work of the modules.

The invention discloses an uninterrupted anode steel claw drying system comprising a PLC control cabinet, an intermediate frequency power supply, a heating dryer and a catenary suspension; the intermediate frequency power supply is used for powering the PLC control cabinet and the heating dryer; the PLC control cabinet is used for controlling the catenary suspension to drive an anode steel pawl toenter the heating dryer for drying; the catenary suspension is arranged over the heating dryer; the heating dryer is a rectangular box body, and the upper part of the box body is provided with a drying groove, and the size of the drying groove matches the size of the anode steel claw; the box body is internally filled with a high temperature resistant material, and the box body is provided with an induction coil on both sides parallel to the drying groove. The system of the present invention can improve the drying efficiency of the anode steel claw and reduce the maintenance cost of the equipment.

The invention provides a ramjet with a variable flow channel and a design and adjustment method. The ramjet with the variable flow channel comprises an air inlet channel, a combustion chamber and a spray pipe. A fixed partition plate is installed in the combustion chamber and divides a flow channel of the combustion chamber into a shared flow channel and a second flow channel. An adjustable partition plate is installed at the end, close to the air inlet channel, of the fixed partition plate and can rotate. The flow channel of the ramjet can be changed by adjusting the position of the adjustable partition plate. According to the ramjet with the variable flow channel and the design and adjustment method, the fixed partition plate is installed in the combustion chamber, the flow channel of the ramjet can be adjusted by adjusting the adjustable partition plate connected with the fixed partition plate, and the effect of adjusting an air inlet channel throat and a combustion chamber heat throat simultaneously can be achieved without arrangement of a spray pipe adjustable device.

The invention discloses a combined fuel supply device, a combustion chamber and a fuel supply method. The combined fuel supply device comprises a fuel supply mechanism extending in the radial direction, a radial stabilizer arranged behind the fuel supply mechanism and a connecting section used for connecting the fuel supply mechanism and the radial stabilizer. The fuel supply mechanism comprises a fuel injection rod and a fuel supply pipe which is coaxially distributed with the fuel injection rod and arranged at the outer side of the fuel injection rod, a plurality of fuel injection nozzles which are used for fuel injection and distributed in the radial direction are formed in the fuel injection rod, openings of the fuel injection nozzles are located at the outer side of the fuel supply pipe, and the fuel injection direction of the fuel injection nozzles is perpendicular to the incoming flow direction. According to the combined fuel supply device, the thermal protection problem under the high-temperature large-incoming-flow condition and the efficient combustion organization problem under the low-temperature large-incoming-flow condition can be solved.

The invention discloses a two-stage integral swirler and a flame tube head structure. The two-stage integral swirler is arranged into an inner cavity between a fuel oil nozzle and a flame tube head ring, the inner cavity is used for shearing and atomizing fuel oil sprayed by the fuel oil nozzle and conveying the fuel oil into the flame tube head ring, the two-stage integral swirler is cylindrical and is provided with an inner channel distributed along the axis in the middle of the two-stage integral swirler, the two-stage integral swirler is provided with a beveled hole and a curved flow channel which respectively communicate with the inner channel, the beveled hole is arranged close to the input end of the two-stage integral swirler, the curved flow channel is arranged on one side, far away from the input end, of the beveled hole, air flow outside the beveled hole is introduced into the inner channel through the beveled hole, first rotating air flow is formed in the inner channel, and air flow outside the curved-surface flow channel is introduced into the inner channel through the curved-surface flow channel, and second rotating air flow is formed in the inner channel. The two-stage integral swirler can meet the requirement of a high-temperature-rise combustion chamber for the concentration field of a main combustion area.

The invention discloses an energy-saving low-loss anti-interference wire cable. The energy-saving low-loss anti-interference wire cable comprises a conductor, wherein a glass fiber insulating layer, a silica gel protective layer and a packing layer are wrapped on the outer surface of the conductor in sequence; the packing layer is formed by laminating ceramic powder, mica and asbestos, and reinforcing ribs are further additionally arranged in the packing layer; an electromagnetic shielding layer is wrapped on the outer surface of the packing layer; an anti-radiation layer and a rubber insulating outer skin layer are wrapped on the outer surface of the electromagnetic shielding layer in sequence; the anti-radiation layer is made of metal wires, and has a good anti-radiation performance; the wire cable is provided with the rubber insulating outer skin layer, so that insulation, tensile resistance, impact resistance and radiation isolation of the wire cable are solved, and the wire cable has a good bending performance and also isolates external radiation; a waterproof film formed by spraying a polyurethane waterproof coating is arranged on the outer side of the rubber insulating outer skin layer; the waterproof film achieves a waterproof effect effectively, so that the wire cable is protected; and meanwhile, the wire cable is effectively protected by the reinforcing ribs and the rubber insulating outer skin layer, so that the wire cable is prevented from causing loss due to external reasons.

The invention discloses a movable integrated carbon dioxide precooler, and relates to the technical field of refrigeration equipment. The system comprises a heat preservation box body, and a compressor, an air-cooled condenser, a first liquid storage device, a first heat exchanger, a gas-liquid separator, a second heat exchanger, a second liquid storage device, an evaporator, a first fan and a material conveying belt which are arranged in the heat preservation box body; the material conveying belt extends from the feeding hole to the discharging hole; the compressor, the air-cooled condenser,the first liquid storage device, the first channel, the third channel and the gas-liquid separator are sequentially communicated, and the liquid outlet end of the gas-liquid separator is communicatedwith the liquid inlet end of the compressor to form refrigerant flowing circulation; and the fourth channel is communicated with the second liquid storage device, and the second liquid storage deviceis communicated with the evaporator to form carbon dioxide flow circulation. The integrated design is adopted, the structure is compact, moving and transporting are convenient, the requirement for rapid pre-cooling of fruits and vegetables can be met, a carbon dioxide refrigerant is environmentally friendly, the refrigerating capacity per unit volume is high, the refrigerating efficiency can be improved, energy consumption is reduced, and the equipment size is reduced.

The invention discloses a cotton fiber self-circulation continuous cutting device, and the device comprises an electric stirrer, a slurry tank, a stator cutter, a machine base, a cutter feeding and retracting support, a cutter feeding and retracting control mechanism, a rotor cutter driving mechanism, a rotor cutter and a backflow pipe. An output shaft of the electric stirrer extends into the slurry tank and is provided with stirring blades at the end part; cutter mounting holes are formed in positions, opposite to the stirring blades, of the slurry tank; the stator cutter is fixedly mounted on the inner circumference of the cutter mounting hole; the base is correspondingly positioned on one side of the slurry tank; the cutter feeding and retracting support is slidably mounted on the machine base in the direction parallel to the axis of the cutter mounting hole. The rotor cutter is matched and meshed with the stator cutter; one end of the return pipe is communicated with the cutter mounting hole, and the other end is bent and extends into the slurry tank. The invention discloses a cotton fiber self-circulation continuous cutting device and a cutting method. A stator cutter and a rotor cutter jointly realize cutting treatment on long cotton pulp fibers; in addition, continuous self-circulation cutting treatment of the slurry can be achieved through the arrangement of the backflow pipe, and the production efficiency is improved.