67results about How to "Uniform temperature field" patented technology

The invention provides a precise rolling process for a high-carbon cobalt-based wear-resistant stellite 6B alloy plate, and mainly relates to the field of plate rolling. The rolling process comprises the working procedures of stellite 6B alloy plate blank heating, aluminum silicate fiber cotton wrapping, hot rolling, machining, precise rolling, coping, inspection and the like. The stellite 6B alloy plate prepared by the method is excellent in wear resistance, meets the use requirements of high-performance plates on wear resistance, long service life and high strength, and has a good market application prospect.

The invention discloses a preparation method of a low-cost high-performance TiAl alloy engine blade, relates to the technical field of TiAl alloy preparation, and provides a method for preparing the TiAl alloy blade by combining precision casting and vacuum isothermal forging. The process route comprises the steps of prefabricated blank smelting and precision casting, annealing heat treatment, vacuum isothermal forging of a blade final forging piece, heat treatment and blade machining, and compared with a cast blade, the mechanical property is remarkably improved, and the yield is also remarkably increased; compared with a traditional forged blade, the manufacturing cost is greatly reduced due to the fact that the process is greatly shortened; compared with ingot casting / rod casting and high-temperature forging, the method has the advantages that the material utilization rate and the mechanical property are improved, and the manufacturing cost can be reduced; in addition, compared with forging under the atmospheric condition, the problem of severe oxidation does not exist, and the material utilization rate and the mechanical property are obviously improved. Therefore, the method provided by the invention has important commercial value.

The invention discloses a high-temperature radiation furnace tube for enhancing heat transfer as well as a preparation method and application of the high-temperature radiation furnace tube. The heat-transfer-enhanced high-temperature radiation furnace tube comprises a high-temperature radiation furnace tube, namely a thick tube, of which the inner surface is subjected to roughness treatment and / or a high-temperature radiation furnace tube, namely a streaming terminal, of which the inner surface is sequentially subjected to roughness treatment and streaming structure surfacing treatment, and the roughness parameter Ra of the inner surface of the thick tube is 3.2-40.5 m; and the streaming structure is in one or more forms of a sphere, a raindrop shape and a strip shape. According to the invention, the heat conduction effect and the temperature and airflow uniformity of the furnace tube can be obviously improved through combination of slight increase of the inner surface area and a micron-scale inner surface streaming structure within a certain range, meanwhile, the filling volume of a catalyst in the furnace tube is not influenced, and obvious pressure drop at the outlet end of the furnace tube is avoided.

The invention provides a sulfate-containing waste liquid treatment system and a sulfate-containing waste liquid treatment method for acrylonitrile and a combination device thereof, the system comprises at least two sets of waste liquid treatment units and a set of flue gas treatment unit, sulfate waste liquid is divided into two strands to enter the two sets of waste liquid treatment units for combustion, waste heat utilization and quenching purification, the discharged sulfur-containing flue gas is collected and enters a set of flue gas treatment unit, the sulfur-containing flue gas subjected to deep cooling, demisting and drying can be directly used for producing high-purity sulfuric acid, and a two-end and one-tail mode is adopted, so that the operation flexibility of the system is improved, and the treatment pressure is reduced. In the waste liquid treatment unit, a high-temperature reaction device adopts segmented air distribution, so that sufficient combustion of waste liquid is ensured, and SO2 loss is reduced; a special temperature field and structural design in the waste heat boiler can prevent the heat exchange device from scaling and blocking; a venturi scrubber is adopted in the quenching purification device to quench the flue gas, and a protective liquid film is formed on the contact interface of the high-temperature flue gas and a liquid phase, so that the temperature of equipment is effectively reduced, and corrosion of the high-temperature flue gas is prevented.

The invention discloses a preparation method of a tungsten-nickel target material for electrochromic intelligent glass, and relates to the technical field of tungsten-nickel target materials, and the preparation method comprises the following preparation steps: uniformly mixing N powder and W powder to obtain W-N mixed powder; the W-N mixed powder is put into a graphite mold to be flatly laid; putting the graphite grinding tool filled with the W-Ni mixed powder into a vacuum hot-pressing sintering furnace, firstly increasing the pressure to 6-10MPa, maintaining the pressure for 10-15min, and then releasing the pressure; the method comprises the following steps: vacuumizing a vacuum hot-pressing sintering furnace to below 5Pa, then carrying out three-stage heating to 1250-1300 DEG C, carrying out heat preservation for 30-60 minutes after heating is finished, then carrying out two-stage pressurization to 35-40 MPa, carrying out heat preservation and pressure preservation for 90-150 minutes, and then cooling to 100-200 DEG C along with the furnace to obtain a WNi alloy target blank; the temperature field is uniform through three-section heating, radial shrinkage is inhibited through pressure supplement, and finally, uniform and fine grain structures are obtained while the density of the target material is improved through a two-section pressurizing mode.

The present invention discloses a gas low-nitrogen burner and a combustion method that couples barrier wind with staged combustion. Through the three-dimensional arrangement of gas, air and barrier wind nozzles, air, gas and 20% to 25% of recycled flue gas are evenly divided into three stages as barrier wind and delivered into the furnace. The barrier wind can delay the direct contact between air and gas, so that the gas is fully mixed with the air before ignition and is evenly diluted by the barrier wind, thereby achieving uniform combustion and uniform temperature field in the space. At the same time, the barrier wind can also reduce the oxygen partial pressure, absorb the released heat, and reduce local high-temperature areas; in addition, through the three-dimensional arrangement of gas and air and the reasonable step-by-step distribution of gas and air into the furnace, the high-temperature combustion area is controlled to create a reducing atmosphere, even in the presence of NO x The present invention couples the barrier wind and staged combustion technology to reduce the NO x The emission concentration is reduced to less than 30mg / Nm 3 It is suitable for newly built or existing low-nitrogen gas boiler projects and has broad application prospects.

The invention relates to the technical field of metal welding, and discloses a welding process of high-strength medium alloy carburizing steel, which comprises the following steps: preheating the whole weldment to 200-250 DEG C before welding; the overall temperature of a weldment is kept at 200-250 DEG C in the welding process; and after welding is completed, a weldment is integrally heated to 250-300 DEG C, and heat preservation is conducted for preset time. According to the scheme, a new preheating technology in the welding technology is provided for the high-strength medium alloy carburizing steel, overall preheating is adopted before welding, during welding and after welding instead of local preheating, the temperature ranges before welding and during welding are kept consistent, the temperature range after welding is slightly higher than the temperature ranges of the first two stages, it is advantageously kept that the temperature of a mother part in the whole welding stage is stable and uniform, and the welding quality is improved. The temperature gradient in the whole welding process is reduced to the minimum, and through appropriate process steps and welding parameters, it is guaranteed that weld joints do not have welding defects, and meanwhile the mechanical property requirements of products are met.

This utility model relates to the field of fiber composite material tank winding molding, and provides a closed-cavity self-heating fiber winding molding tooling, including: a central rotating shaft, a heating assembly, and a detachable molding surface composed of multiple molding panels; wherein a heating element is attached to the inner surface of the molding panel; a conductive slip ring is provided at the end of the central rotating shaft to conduct electrical energy to the heating element; a temperature monitoring device collects the temperature of each molding panel in real time. This tooling achieves in-situ curing of the composite material under rotation by conducting electrical energy to the heating element through the conductive slip ring, and the temperature monitoring device can monitor and adjust the temperature in real time to ensure a uniform and stable temperature field; at the same time, the segmented and detachable design facilitates demolding after curing. This utility model solves the self-heating problem of fiber winding molding tooling with a closed cavity, and can significantly improve the molding efficiency and molding quality of composite material tank parts, and has good application prospects.

This invention provides a coupled method for thermal cycling control and online cooling to maintain supersaturated solid solution. By integrating multiple online cooling devices and a closed-loop temperature control strategy, it achieves precise management of interlayer temperature, effectively suppressing premature precipitation of Y and O elements during the additive manufacturing process, maintaining a high degree of supersaturation in the matrix, and providing a favorable condition for the formation of ultrafine nano-precipitates in subsequent heat treatment. Simultaneously, the linkage between interlayer temperature window control and process parameter adjustment ensures that each layer experiences a similar thermal history, significantly improving the microstructure consistency along the height direction of the component and eliminating performance gradient differences present in traditional processes. The introduction of a periodic thermal cycling management strategy further releases thermal stress, homogenizes the temperature field, and prevents precipitation coarsening through rapid cooling, thereby improving the overall mechanical properties of the material. This invention provides an efficient, controllable, and reliable process solution for the additive manufacturing of high-performance ODS-RAFM steel.

The invention discloses a large-size boron carbide-graphene composite ceramic as well as a preparation method and application thereof. The large-size boron carbide-graphene composite ceramic has high compactness and a uniform microstructure, the size of the large-size boron carbide-graphene composite ceramic is 17-22 cm, the density of the large-size boron carbide-graphene composite ceramic is 2.502-2.518 g / cm < 3 >, the Vickers hardness of the large-size boron carbide-graphene composite ceramic is 31.5-33.8 GPa, the bending strength of the large-size boron carbide-graphene composite ceramic is 462-536 MPa, and the fracture toughness of the large-size boron carbide-graphene composite ceramic is 3.86-4.73 MPa.m < 1 / 2 >. The boron carbide-graphene composite ceramic prepared by adopting an HP and SPS dual-mode sintering mode is fine in grain, and the graphene structure is complete, so that the improvement of the mechanical property of the material is facilitated. Meanwhile, the method is simple in process, good in repeatability and high in stability, and industrial and batch stable production is easy to achieve.

The utility model relates to the technical field of detection devices, and discloses an underground coal mine flame-retardant cable copper conductor detection device which comprises a base, an air cylinder is installed below the base, a base is installed at the bottom of the interior of the base, a sample tube base is installed above the base, a sample tube is placed on the sample tube base, and the sample tube is connected with the air cylinder. A connecting port is formed in the upper portion of the interior of the base, the connecting port upwards extends out of the base to be connected with a container type pipeline module, a pressure sensor is installed on the surface of the right face of the container type pipeline module, and an air inlet device is installed on the container type pipeline module. According to the underground coal mine flame-retardant cable copper conductor detection device, through the arrangement of the integrated container type pipeline module and the air cylinder, an instrument automatically installs a sample tube to a connecting port, operation is more convenient, meanwhile, test errors caused by manual installation of the sample tube are avoided, through an integrated container type pipeline, no pipeline connector exists between valves, and the detection efficiency is improved. Gas leakage points are reduced and a temperature field is uniform.

The invention discloses a preparation method of an amorphous iron core, and belongs to the technical field of amorphous iron cores. The invention discloses a preparation method of an amorphous iron core, which comprises the following preparation steps: (1) winding an iron-based amorphous alloy strip to obtain an amorphous iron core blank; (2) carrying out pre-annealing treatment on the amorphous iron core blank; (3) winding copper strips inside and outside the amorphous iron core blank subjected to pre-annealing treatment, and performing secondary annealing treatment; and (4) putting the amorphous iron core blank subjected to secondary annealing treatment into an insulating adhesive for vacuum impregnation, taking out the amorphous iron core blank, and putting the amorphous iron core blank into a drying oven for drying to obtain the amorphous iron core.

The utility model discloses a tinned copper clad steel wire heat treatment device, including heating furnace, the right side fixed mounting of heating furnace has circulating fan, the air outlet pipe of circulating fan extends to the inside communication of heating furnace's downward exhaust pipe, the top communication of exhaust pipe has the air outlet head, the back of heating furnace inner chamber is installed spiral heating tube, the front of spiral heating tube is installed and is connected to the heat conduction fin, and the left end of spiral heating tube extends to the outside fixed mounting of heating furnace and is installed heater. The utility model discloses through circulating fan cooperation spiral heating tube and heat conduction fin, forms hot -blast circulation system, ensures the evenness of furnace temperature field, avoids the partial overheating of wire rod, and rotating disc, limit post and vertical rod constitute the rotating type wire rod fixed establishment, can drive wire rod uniform speed rotation, guarantees heat treatment consistency, and temperature detector real -time feedback temperature data, combines the adjustment of air vent and sealing door, realizes the accurate control of heat treatment process.

The present invention discloses an oil supply atomization device, a combustion chamber device and a micro jet engine, comprising: an oil supply ring connected to an oil supply main pipe; an evaporator pipe, the evaporator pipe comprising a preheating part and an evaporator, one end of the preheating part is connected to the oil supply ring, the other end of the preheating part is connected to the evaporator, and the outer periphery of the preheating part is covered with a heat conductor. During operation, the oil supply main pipe supplies fuel to the oil supply ring, the fuel enters the evaporator pipe from the oil supply ring, the fuel first enters the preheating part, the heat conductor can quickly transfer the heat in the combustion chamber to the fuel entering the preheating part, so that the fuel enters the evaporator after rapid preheating, and is ejected after further heat transfer from the evaporator, which is conducive to sufficient preheating before the fuel enters the combustion chamber, so that the fuel is fully evaporated, and uniformly distributed atomized fuel hot steam is formed, the fuel has a high atomization degree, the combustion is more sufficient and stable, the combustion chamber is not prone to stall, and the micro jet engine is not prone to surge and air parking.

The invention discloses a self-adaptive variable-temperature energy-saving control method and device for a heating, ventilation and air conditioning system, and relates to the field of self-adaptive control of the heating, ventilation and air conditioning system. The method comprises the following steps that S1, three-dimensional data are collected; s2, intelligent decision making; s3, executing control; s4, grading an energy-saving strategy; and S5, performing a fault self-healing process. The millimeter wave radar and infrared sensing collaborative sensing technology is adopted, a space energy distribution model is accurately constructed, meanwhile, an intelligent algorithm comprehensively analyzes human physiological signals and environment parameters, the user activity state is recognized in real time, a temperature regulation and control scheme is dynamically optimized, the thermal comfort is greatly improved, and the energy utilization rate is increased. An advanced closed-loop control system is combined with a high-speed response element, it is ensured that a temperature field is stable and uniform, in addition, the service life of equipment is remarkably prolonged through the online fault self-diagnosis function, the intelligent dormancy technology is combined with an intelligent energy storage strategy, and standby energy consumption is greatly reduced while the optimal comfort level is maintained.

The invention relates to the technical field of smelting, in particular to high-impact-toughness low-temperature B-grade steel which comprises the following components in percentage by mass: 0.17%-0.23% of C, 0.3%-0.4% of Si, 1%-1.2% of Mn, less than or equal to 0.03% of S, less than or equal to 0.03% of p, 0.3%-0.4% of Cr, 0.25%-0.3% of Ni, less than or equal to 0.04% of Cu, 0.01%-0.04% of Ti and the balance of Fe and inseparable impurities. The invention further relates to a preparation process of the high-impact-toughness low-temperature B-grade steel. The prepared low-temperature B-grade steel can keep high impact toughness at the low temperature (minus 50 DEG C), wherein the impact toughness is almost unchanged compared with the impact toughness at the normal temperature.

The utility model discloses a graphite water separation dehydration device which comprises a dehydration tank body, an upper cover, a transmission bin and a water storage bin, a moisture exhaust fan is arranged in the upper cover, a stirring device is arranged at the bottom of the dehydration tank body, a transmission mechanism of the stirring device is arranged in the transmission bin, and a water storage device and a heating pumping device are arranged in the water storage bin. A stirring device is arranged in the dewatering tank body, a drying tank is arranged above the stirring device, a liquid supply channel is arranged in the side wall of the drying tank, the drying tank is communicated with the heating pumping device through a guide pipe, a lifting device is arranged on one side of the dewatering tank body, and the lifting device is connected with the drying tank. And meanwhile, the drying position can be flexibly controlled, the drying tank is adjusted to be in full contact with the graphite, and the drying effect is ensured.

The utility model relates to thin film deposition equipment. The thin film deposition equipment comprises a body part, a rotating part and a carrier, the body part is provided with a reaction cavity; the rotating part comprises a driving part and a rotating part, the rotating part comprises a shaft part and a rotary table, the rotary table is located in the reaction cavity, one end of the shaft part is connected with the rotary table, the other end of the shaft part extends out of the reaction cavity and is connected with the driving part, and the driving part can drive the shaft part to drive the rotary table to rotate; the carrier is placed on the rotary table and can rotate along with the rotary table; the rotating piece is further provided with a cleaning cavity, the outer wall of the cleaning cavity is further provided with a purging hole, and the outer end of the shaft part is further provided with a purging inlet communicating with the cleaning cavity. According to the thin film deposition equipment, the cleanliness of the interior of the thin film deposition equipment can be improved, the substrate coating quality and efficiency are guaranteed, and the influence of dust cleaning on the production efficiency is reduced.

The invention relates to the technical field of glass processing equipment, in particular to preheating equipment for producing characteristic glass. Comprising a support; the outer wall of the bottom of the thermal insulation furnace box is fixedly connected with the outer wall of the top of the bracket; the outer wall of the heating wire is fixedly connected with the side wall in the thermal insulation furnace box; the outer wall of the conveying belt is rotationally connected with the inner wall of the bracket through a rolling roller; the outer wall of the ventilation device is fixedly connected with the outer wall of the bracket; the input end of the circulating fan is fixedly connected with the outer wall of the ventilation device; the outer wall of the conveying device is fixedly connected with the output end of the circulating fan; the ventilation rate in the thermal insulation furnace box can be controlled by arranging the ventilation device composed of the opening and closing device and the receding device, part of high-temperature air can pass through the through groove to be located below the glass through the receding device, and in the gradual moving process of the glass, the bottom of the glass is subjected to preheating treatment as well; and the purpose of uniformly heating the glass is achieved.

This invention provides a stirring head for friction stir welding. The stirring head includes a holding handle, a stirring pin, and a shoulder. The shoulder is located at one end of the holding handle and is frustoconical in shape. The lower surface of the shoulder connects to the holding handle, and the center of the upper surface of the shoulder connects to the root of the stirring pin. The stirring pin is conical, and its side is provided with a double right-hand thread structure. The double right-hand thread structure includes a first right-hand thread and a second right-hand thread. The first right-hand thread includes a single-start thread, and the second right-hand thread includes a three-start thread. The stirring head provided by this invention can solve the weld defects caused by insufficient heat input and inadequate material flow in the initial stage of friction welding, and improve the weld formation quality and mechanical properties in the initial stage of welding.

The utility model provides a kind of ceramic insulating thin-walled zirconium alloy target device, copper nut is connected direct current wire is set in reproduction passage, and direct current wire is communicated to target bottle tube, target bottle tube is placed in target box, target box is placed in trolley assembly, trolley assembly is positioned in the inner wall of production passage by connecting pin, direct current wire is used to heat each component, each component is coated with ceramic insulating layer, realize the electric isolation of each component, and the thickness of production passage, trolley assembly, target bottle tube and target box is all the thin wall of- millimeter, and temperature measuring point is set to each component to detect the temperature of each component;Using the above technical scheme, each component is independently set to facilitate assembly;Direct current wire is connected with target material through each component, and each component is coated with ceramic insulating layer, so that production passage, trolley assembly, target box and target bottle tube are respectively direct current resistance heating, temperature rises fast and temperature field is uniform.

The present invention discloses a resistive salt bath heater, a manufacturing method and a use method, comprising a double-layer cylinder assembly, wherein the inner cavity of the double-layer cylinder assembly is provided with a coil assembly, and the inner cavity of the double-layer cylinder assembly is filled with molten salt; an explosion-proof heating core assembly is arranged on the double-layer cylinder assembly; a first metal tubular electric heating element is distributed in a ring shape on the outer side of the double-layer cylinder assembly. In the present invention, molten salt is used as a heat transfer carrier, the temperature difference between the cold source / heat source heat exchange surface is small, and the temperature field is uniform, which solves the problems of medium decomposition caused by uneven temperature field of heater equipment and local overheating, high product impurity rate, low production efficiency and high production cost, and can be widely used in many explosive gas / dust environments, has no safety hazards, and meets the needs of safe production.

This invention discloses a horizontal rotating fluidized bed boiler, comprising: a main furnace; a frame disposed at the lower part of the main furnace; an air distribution chamber supported on the frame by rolling bearings at its bottom; a drive mechanism fixedly disposed on the frame, its output end being connected to the air distribution chamber for transmission; multiple vertically arranged air distributors in an array, the lower parts of the multiple air distributors being cast together by heavy castable material to form an integral disc structure with a high outer side and a low center; and a dynamic water seal structure, comprising: an annular water tank; and an annular baffle; the annular water tank rotates with the air distribution chamber, while the annular baffle remains stationary, and the outer edge of the disc structure is located above the inner region of the annular water tank. The uniform fluidization of this invention ensures thorough mixing of biomass fuel and air, resulting in more complete combustion and a more uniform temperature field in the main furnace, thereby directly improving thermal efficiency and reducing heat loss from incomplete combustion.

The invention discloses a method and a system for realizing a high-temperature temperature field of a material based on laser-assisted heating. The method comprises the following steps of: prefabricating speckles with proper size, certain density and random degree on the surface of a tested piece; the test piece is tightly attached to the graphite plate in a mode of drilling holes in the graphite plate; fixing the test piece on the clamp through a pin, and closing the furnace door; vacuumizing the high-temperature furnace through a mechanical pump and a diffusion pump until the high-temperature furnace is close to a vacuum state; resistance wire heating is started, and resistance wire input current is slowly increased; when the temperature of the high-temperature furnace reaches 700 DEG C, a heat preservation state is set, and the control cabinet can automatically set the current to maintain the current temperature; starting a laser to start auxiliary heating, setting the output power to be 1%, increasing the power after the laser is stable, increasing the power by not more than 5% every time, and when the power is increased to 41%, enabling the temperature of the test piece to reach 1200 DEG C; and starting a tensile experiment, and measuring speckle deformation on the surface of the test piece through non-contact measurement equipment to obtain test piece deformation data.

The invention relates to the technical field of metallurgy, in particular to a blast furnace optimized operation method which comprises the steps that an air supply system is adjusted, a charging system corresponding to the air supply system is adjusted, and the air supply system comprises the steps of adjusting air supply parameters, controlling the annulus area ratio of a tuyere rotation area and controlling the gas volume; the charging system comprises control over upper airflow, control over furnace burden distribution and control over coal gas flow distribution. By optimizing the air supply parameters and the charging system, the production efficiency, the energy utilization rate and the environmental protection performance of the blast furnace are remarkably improved, and the balance of a temperature field, airflow distribution and material distribution in the blast furnace is realized, so that the overall operation effect of the blast furnace is improved.

The invention discloses an environment direct disturbance suppression system for supporting shock insulation stability performance. The environment direct disturbance suppression system comprises a greenhouse, a control module, an upper high-temperature cold source module, a lower high-temperature cold source module, an air conditioning equipment module and an environment monitoring module, the greenhouse is divided into an upper greenhouse cabin and a lower greenhouse cabin; the upper greenhouse cabin covers a seismic isolation platform surface of the seismic isolation platform, and the lower greenhouse cabin covers an underground part of the seismic isolation platform; the environment monitoring module is controlled by the control module to collect environment parameters in the upper greenhouse cabin and the lower greenhouse cabin in real time, and transmits the collected temperature of the upper greenhouse cabin and the lower greenhouse cabin to the control module; the control module controls the air conditioning equipment module and the upper high-temperature cold source module to regulate and control the internal temperature of the upper greenhouse cabin in a time-sharing manner based on the temperature of the upper greenhouse cabin; and meanwhile, the control module controls the lower high-temperature cold source module to regulate and control the internal temperature of the lower greenhouse cabin based on the temperature of the lower greenhouse cabin. And finally, the temperature field in the greenhouse is uniformly distributed, so that the influence of temperature fluctuation and airflow disturbance on the seismic isolation platform is inhibited.

The invention discloses a manufacturing method of a martensitic heat-resistant steel small-caliber thick-wall pipe, which specifically comprises the following steps of: (1) preparing round steel of martensitic heat-resistant steel G115, peeling, cutting off, grinding and inspecting a pipe blank, performing hot piercing, and tempering, pickling, cutting the pipe, grinding, inspecting and cleaning a pierced billet after piercing; (2) carrying out cold rolling of a deformation process on the pierced billet obtained in the step (1), and then carrying out heat treatment to obtain a finished product specification; and (3) performing visual inspection, size inspection, cleaning, mark spraying and finishing procedures on the finished pipe obtained in the step (2), and finally packaging and warehousing. The technological process provided by the invention is standardized, simple to operate and suitable for batch production, meanwhile, good balance is achieved between product performance indexes and cost control, and technical support is provided for application of the G115 steel in the small-caliber thick-wall pipe.

This invention relates to the field of fuel cell technology and discloses a fuel cell heat dissipation system and control method for active balancing heat dissipation in unmanned aerial vehicles (UAVs). The fuel cell heat dissipation system includes a UAV heat dissipation assembly and an active balancing control subsystem. The UAV heat dissipation assembly includes a liquid cooling circuit and rotors disposed at the tips of multiple heat dissipation arms. The liquid cooling circuit includes coolant channels disposed inside the multiple heat dissipation arms. The coolant channels include in-arm liquid inflow pipes and in-arm liquid return pipes. Multiple in-arm liquid inflow pipes are arranged close to the inner side of the heat dissipation arms, and the multiple inflow pipes converge at the tips of the heat dissipation arms and connect to the in-arm liquid return pipes. The inflow pipes have an S-shaped variable diameter pipe structure, and their arrangement density gradually decreases from the root to the tip of the heat dissipation arm. The active balancing control subsystem includes a sensor group, an actuator group, and a controller. This invention can improve the reliability and flight safety of the UAV thermal management system.

The utility model discloses a refrigerating system applied to a constant temperature and humidity test box, which comprises a box body, the inner surface of the box body is fixedly connected with an object placing plate, an air inlet pipe penetrates through the side surface of the box body, the inner wall of the air inlet pipe is fixedly connected with a bracket I, and the inner surface of the bracket I is fixedly connected with a motor I; the output end of the first motor is fixedly connected with driving fan blades, one end of the air inlet pipe communicates with a housing, a plurality of air outlets are formed in the housing, the inner surface of the housing is rotationally connected with a baffle, an opening is formed in the baffle, the baffle is movably connected with the air outlets, the front surface of the baffle is fixedly connected with a rotating rod, and the outer wall of the rotating rod is fixedly connected with driven fan blades. Through the components, the blowing-out concentrated air flow can be scattered, so that the air flow is not concentrated in a certain direction any more and is more uniformly diffused into the whole test box, and a stable and uniform temperature field is favorably formed.

The utility model relates to a kind of directional solidification devices for metal smelting, including smelting furnace body and be located in the crucible of the furnace body, the crucible outside is equipped with the induction coil for inductive heating, the crucible is split type's bottomless water-cooled copper crucible, its inner side wall is equipped with multistage full-wrapping water circulation cooling structure;The top of the crucible is equipped with the rotary feeding table that can continuously feed into the crucible, bottom is equipped with a condensation casting device that can move up and down, the utility model is through the linkage design of top rotary feeding table and bottom condensation casting device, realizes the synchronous of "melting-feeding-solidification-pulling ingot", overcome the defect that the prior art must interrupt pulling ingot to feed, eliminates feeding downtime, so that single furnace time pulling ingot efficiency improves 30%-50%, and can support the continuous preparation of more than one meter long size bar stock, reduce subsequent splicing processing procedure, significantly shorten production cycle.