270 results about "Thermal fatigue" patented technology

The invention relates to the technical field of digital twinning, and discloses a precision casting mold life prediction method based on digital twinning, which comprises a mold data acquisition module, a mold data processing module, a mold coefficient generation module, a prediction model establishment module and a mold life prediction module. Physical data, operation data and maintenance records are synchronously collected through the multi-source sensor, and full-life-cycle real-time monitoring is achieved; establishing comprehensive evaluation of four types of quantization coefficients, thermal fatigue coefficients, comprehensive mechanical coefficients, comprehensive wear coefficients and comprehensive maintenance coefficients to realize multi-field damage coupling analysis; the life prediction index unifies the multi-dimensional damage to be 0-1 standard, outputs a visual life percentage and sets a graded early warning threshold value, so that the prediction precision is improved; all coefficients are calculated through a standardized formula, a full-digital process from data acquisition to index generation to model prediction to decision support is constructed, and the detection requirements of new materials and complex structure molds are met.

A system may comprise a neural network trained to predict mechanical damage to field-deployed industrial equipment with a main or supplementary function to transfer heat change phase, or drive / limit a reaction. The neural network may be trained using an idealized geometry. A processor may receive process input data from the equipment and may provide the data to the trained neural network. The processor may generate a prediction of mechanical damage using the trained neural network and the process input data. The process input data may comprise temperature data collected during operation. A scanning device may generate a digital twin of at least a portion of the equipment through scanning and ultrasonic testing. A monitoring module may monitor processes through a control system to collect the process input data. The neural network may comprise a convolutional neural network configured to calculate damage using a surrogate model.

The invention, which relates to the technical field of power transmission, discloses a high-power intelligent temperature control cable comprising a conductor, a first insulating layer, a temperature control system, an early warning system and a protective sleeve. The conductor is made of a high-conductivity material, and the conductor is coated with a first insulating layer; the temperature control system comprises a liquid cooling pipe and a plurality of temperature sensors, and cooling liquid is suitable for flowing in the liquid cooling pipe; the early warning system comprises a temperature sensing optical fiber which is distributed along the axial direction of the conductor, and the temperature sensing optical fiber is connected with a fault early warning module; the protection sleeve wraps the conductor, the temperature control system and the temperature sensing optical fiber and comprises an electromagnetic shielding layer, a mechanical protection layer and a safety protection layer. The temperature sensor and the fault early warning module are used for connecting the control unit. The operating temperature of the cable is adjusted in real time through the temperature control system, and thermal fatigue of the conductor is effectively inhibited; high-strength electromagnetic shielding, mechanical tensile strength and bending resistance are provided through the protective sleeve; and the temperature and strain states of the cable are monitored in real time through the early warning system, so that the operation safety is improved.

The invention discloses a high-frequency induction intelligent control system and a thermal fatigue test method, and belongs to the technical field of thermal fatigue tests.The method specifically comprises the steps that a to-be-tested sample piece is installed, heating parameters are set, heating is started, heating is stopped after the to-be-tested sample piece is heated to a preset temperature, and the to-be-tested sample piece is cooled until the temperature drops to a preset lower limit; in the heating and cooling process, the surface and core temperature of a to-be-detected sample piece is collected in real time, the heating-cooling step is repeatedly executed according to the preset number of cycles or to a preset damage threshold value, the temperature curve, the power curve and the cycle count of each cycle are generated, the recorded temperature curve, the power curve and the cycle count are analyzed, and the temperature of the to-be-detected sample piece is obtained. Outputting the thermal fatigue life value of the to-be-tested sample piece; the temperature is intelligently controlled through high-frequency induction, the uniformity of the temperature is ensured, the thermal fatigue life is accurately predicted through multi-dimensional life evaluation and layered modeling, and the speed, precision and reliability of thermal fatigue testing are remarkably improved.

A system may comprise a neural network trained to predict mechanical damage to field-deployed industrial equipment with a main or supplementary function to transfer heat change phase, or drive / limit a reaction. The neural network may be trained using an idealized geometry. A processor may receive process input data from the equipment and may provide the data to the trained neural network. The processor may generate a prediction of mechanical damage using the trained neural network and the process input data. The process input data may comprise temperature data collected during operation. A scanning device may generate a digital twin of at least a portion of the equipment through scanning and ultrasonic testing. A monitoring module may monitor processes through a control system to collect the process input data. The neural network may comprise a convolutional neural network configured to calculate damage using a surrogate model.

The invention discloses a high-strength photovoltaic welding flux for a photovoltaic welding strip and a preparation method of the high-strength photovoltaic welding flux, and belongs to the technical field of energy conservation and environmental protection. According to the solder, the Sn-Zn-Bi alloy is used as a matrix, and the performance is comprehensively improved by introducing a dual nano reinforced phase of the multi-walled carbon nanotubes and the nano nickel particles. The preparation method comprises the steps of matrix alloy melting, a hydrothermal method, a liquid phase reduction method, ultrasonic dispersion, gas atomization powder preparation, silane coupling agent surface modification, scaling powder compounding, reflow soldering and the like. The obtained solder has excellent comprehensive performance, excellent thermal fatigue resistance and long-term reliability. The welding flux is suitable for interconnection welding of a main grid, a fine grid and a welding strip of a crystalline silicon photovoltaic cell, and provides technical guarantee for the service life of a photovoltaic module more than 25 years.

The invention belongs to the field of artificial intelligence and energy power system cross control, and particularly relates to a coal-fired unit fused salt combined frequency modulation control method and device based on deep reinforcement learning. According to the method, a deep reinforcement learning agent model is constructed, and boiler fuel quantity, steam turbine valve position, fused salt heat charging and discharging power and pump starting and stopping signals are dynamically output based on state space vectors; and tracking precision, thermal stress, emission and coal consumption indexes are fused through a multi-target reward function, and strategy autonomous optimization is realized by adopting a double-Q network, experience playback and target network delay updating mechanism. After deployment, the boiler, the steam turbine and the molten salt unit can be coordinated on line, power space-time decoupling and closed-loop cooperation are achieved, on the premise that main steam parameter stability and equipment safety are guaranteed, the frequency modulation response speed and precision are remarkably improved, the thermal fatigue risk is reduced, and the unit economy and the power grid adaptability are enhanced. And a flexible adaptive adjustment capability is provided for a high-proportion new energy power system.

The invention discloses a material with a silver coating for low-temperature brazing of brazing filler metal, and particularly relates to the field of brazing welding, which comprises the following steps: silver amalgam paste is prepared by oscillating and mixing silver powder and mercury according to the mass ratio of 1: 9-0.5: 9.5 in a manner and method for plating silver on the surface of base metal (metal, semiconductor, ceramic or glass); when brazing is carried out, the surface of the silver plating layer of the to-be-welded piece is coated with brazing filler metal, and then heating and pressurizing are carried out in a low-temperature interval of 120-350 DEG C in a vacuum, protective atmosphere or atmospheric environment to complete connection. According to the method, the amalgam reaction and isothermal solidification principles are utilized, a tough welding spot mainly comprising a silver-based solid solution is finally formed, generation of a large number of brittle intermetallic compounds is avoided, a connector has high strength, high reliability and excellent thermal fatigue resistance, and therefore the problems that gold-tin brazing filler metal is high in cost, the brittleness of the welding spot is large, and the welding temperature is high are successfully solved.

The invention provides a preparation method and application of ceramic slurry for high-temperature bonding of aluminum nitride ceramics, and relates to the technical field of high-temperature ceramic materials.The preparation method comprises the following steps that firstly, an organic carrier is prepared, a polymer binder, an organic solvent, a plasticizer and a dispersing agent are weighed according to the weight ratio and stirred at the temperature of 60-70 DEG C till complete dissolution and clarification are achieved for use; 2, an inorganic functional phase is prepared, aluminum nitride powder, yttrium oxide powder and alkaline earth metal oxide powder are weighed according to the weight proportion and placed in a ball milling tank to be evenly mixed, the obtained ceramic slurry serves as a bonding layer, the tolerable temperature can reach 1000 DEG C or above and is far higher than that of metal brazing filler metal, and the ceramic slurry is suitable for severe environments such as aerospace and high-temperature sensors. The main components of the bonding layer are consistent with the base material, and the thermal expansion coefficient is highly matched, so that the thermal stress can be greatly relieved, and the failure of the device caused by thermal fatigue in the temperature cycle is avoided.

The invention discloses a pipe die submerged arc surfacing remanufacturing method and system capable of improving the thermal fatigue performance, and the method comprises the following steps: 1, pretreatment: removing thermal fatigue cracks, cracks and wear scratches on the inner wall of a pipe die by adopting a turning or boring process, the method comprises the following steps of (1) pre-treating a pipe die, (2) pre-heating at low temperature: pre-heating a to-be-welded part of the pre-treated pipe die by adopting a high-frequency induction heating module, (3) carrying out submerged arc surfacing, (4) carrying out subarea induction tempering treatment on the surfaced pipe die, firstly turning or boring all thermal fatigue cracks, cracks, abrasion scratches and high-temperature oxidation fatigue layers on the inner wall of the pipe die, and then carrying out tempering treatment on the pipe die. A low-temperature preheating welding wire formula is adopted, crack resistance is achieved under low heat input, a good structure is formed, curved surface self-adaptive welding is achieved, powder is automatically added in the welding process, welding slag is automatically cleaned, dotting is conducted after welding, stress is released, and longitudinal or transverse cracks are effectively avoided. And tempering the pipe die repaired by surfacing after welding, and carrying out ultrasonic scanning and residual stress testing.

The invention discloses a die-casting die thermal fatigue life detection device, and relates to the technical field of die-casting die detection, the die-casting die thermal fatigue life detection device comprises a detection machine body and a control platform, and the top of the detection machine body is provided with a material thermal fatigue detection assembly and a mechanical load mechanism. When the device is used, the electric push rod pushes the heat insulation sleeve to penetrate through the penetrating hole and continue to move, and the movable turning cover is jacked upwards. Under the combination of the vacuum cavity, the honeycomb-shaped porous heat insulation plate and the metal foil reflecting screen, the heat insulation sleeve forms a triple barrier of reflection, vacuum and porous heat insulation, heat transfer is blocked, and it is guaranteed that cold air is not affected by heat of an air cooling opening when blown. When the material thermal fatigue detection assembly works, the cold air pipe and the heat insulation sleeve are located outside the detection box, the heat absorption temperature of the cold air pipe is prevented from increasing in the heating process, and the mold thermal fatigue detection precision and efficiency can be improved.

The invention relates to a regulation and control method for a nitridation permeable layer of a die-casting die. The regulation and control method comprises the following steps that the die-casting die is pretreated and partitioned; the pretreated mold is placed in nitriding equipment, nitrogen and hydrogen are introduced into the nitriding equipment, the volume ratio of the nitrogen to the hydrogen is (4-5): 1, and heat preservation is conducted after the temperature in the nitriding equipment is increased to a first temperature interval; the nitriding reaction rate in the nitriding equipment is monitored and calculated in real time, and according to the subareas of the die-casting die, a subarea heating program is started, and different areas of the die-casting die are subjected to subarea heating; adjusting the volume ratio of the nitrogen to the hydrogen to be 1: 1, maintaining the temperature of each zone set by the zone heating program, and maintaining the process parameters of the stage until the thickness and hardness of the nitride layer reach target values; and after the nitriding treatment is finished, the mold is cooled to the tapping temperature under the protective atmosphere. The hardness distribution uniformity, the thermal fatigue resistance, the wear resistance and the overall service life of the die-casting die can be improved.

The invention provides an engine cylinder cover thermal fatigue virtual test verification method and system, and relates to the technical field of virtual simulation modeling, and the method comprises the steps: obtaining the micro-macro parameter characteristics of an engine cylinder cover; constructing a parameterized model of micro-macro coupling; performing reverse solution on the control parameters of the physical rack based on a target temperature circulation curve set by a user to obtain a boundary condition parameter set required by a virtual test; generating a virtual-real homologous file according to the parameterized model and the boundary condition parameter set; actual measurement temperature data after the physical rack executes the control instruction file and simulation temperature data after the finite element analysis software executes the simulation input file are collected; according to the two-dimensional topological structure of the fire power surface, virtual thermocouple measuring point coordinates are generated; establishing data channel mapping according to the measuring point coordinates of the virtual thermocouple; calculating temperature errors of the plurality of measuring points; when the temperature error exceeds a threshold value, a correction prompt for the measuring point is output; and verifying the parameterized model according to the correction prompt.

The invention relates to the technical field of metal material surface engineering and equipment remanufacturing, in particular to an early acoustic emission diagnosis and laser cladding repair method for thermal fatigue cracks in a mold service process, which comprises the following steps: S1, synchronously acquiring and preprocessing multi-source heterogeneous data; stress wave signals are collected in real time through a broadband acoustic emission sensor array permanently integrated on the surface of a mold cavity, the frequency response range of the sensor is 100 kHz to 1 MHz, and the sensitivity is not lower than 95 dB. According to the method, accurate identification and positioning can be realized at the initial stage of crack initiation through multi-modal sensing fusion and a deep learning algorithm, the diagnosis accuracy is remarkably higher than that of a traditional offline detection method, and precious time is won for subsequent repair.

The invention discloses an integrated operation and maintenance control platform system of a wind-light same field, relates to the technical field of operation and maintenance control of the wind-light same field, and aims to solve the technical problems that an existing operation and maintenance control platform is inaccurate in equipment fatigue evaluation and poor in adjustment strategy adaptability due to independent identification of power grid working conditions and environment interference. Comprising a multi-physical field-environment data acquisition module which is used for acquiring mechanical, thermal and electric multi-type physical field operation data of fan equipment and photovoltaic inverter equipment in the same wind and light field and environment interference data such as instantaneous wind speed sudden change, extreme illumination intensity and environment temperature sudden change in the same wind and light field area; and the multi-dimensional fatigue evaluation module is used for performing feature extraction on the multi-type physical field operation data, generating a mechanical fatigue factor, a thermal fatigue factor and an electric fatigue factor of the equipment, and correcting each fatigue factor in combination with the environmental interference data. The method has the advantage of improving the running stability of the same wind and light field.

The invention discloses a method for arranging the mounting position of an aviation airplane wheel thermal fatigue early warning device, and relates to the technical field of airplane braking airplane wheels. The method comprises the following steps: acquiring a first lowest temperature corresponding to 10% attenuation of tensile strength of an airplane wheel assembly material, and acquiring a second lowest temperature corresponding to 20% attenuation of tensile strength of the airplane wheel assembly material; based on the temperature of each thermal display unit on the thermal fatigue early warning devices, a plurality of thermal fatigue early warning devices are arranged at equal intervals on the circumference with the stress smaller than 85% of the tensile strength of the airplane wheel assembly material by calculating the fixed rim of the airplane wheel assembly under the radial-lateral design load working condition. The thermal display units with different melting point temperatures are respectively arranged, and whether the airplane wheel is overheated or not is judged by visually observing the use temperature of the airplane wheel.

The application discloses a kind of based on mould casting parting surface with intelligent polishing device and its operating method, it is related to mould polishing technical field, including polishing main body, the inner wall of polishing main body is provided with roller conveyor, and the top of roller conveyor is placed with mould, and one end of polishing main body top is fixedly connected with support plate, one side of support plate outer wall is fixedly connected with electric telescopic table, and the output end of electric telescopic table is threadedly connected with support table.The application is provided with a plurality of grooves in the bottom of grinding ring, so that the air below guide block is discharged through the fitting surface of grinding ring and mould under the traction of groove, further solve the problem that the heat generated by traditional mould casting parting surface with intelligent polishing device cannot be quickly dispersed during use, resulting in surface mould expansion due to heat, inner layer mould constraint expansion, thereby generating tensile stress, and heat fatigue crack can be caused by reciprocating, thereby exacerbating mould deformation.

This invention discloses a cylinder head compatible with multiple fuels, including a first mounting hole and a second mounting hole. The first mounting hole is located on the cylinder head and penetrates both the upper and lower surfaces of the cylinder head. The second mounting hole is also located on the cylinder head and penetrates both the upper and lower surfaces of the cylinder head. The first mounting hole can be used to mount a micro-injector, and the second mounting hole can be used to mount a main injector. The micro-injector and the main injector inject different fuels. Through a special valve arrangement and structural design, the cylinder head integrates the main injector mounting hole, the micro-injector mounting hole, and the air start valve mounting hole. The air start valve mounting hole can also be changed to an injector mounting hole, thereby enabling switching between multiple fuel modes and making it suitable for modular and serialized development of engines on the same platform. The bottom of the cylinder head features a fully enclosed annular water jacket design, solving the problems of thermal fatigue and poor reliability inherent in traditional cylinder heads.

The application relates to a method for improving the thermal fatigue resistance of a lead-free solder interconnection BGA package joint, and relates to the field of electronic packaging welding. The surface of a PCB substrate is processed by superfast laser to have a well-shaped micro-nano structure, the well-shaped micro-nano structure is a grid-shaped straight-line groove microstructure formed by a plurality of transverse parallel lines and a plurality of longitudinal parallel lines, the adjacent interval between the plurality of transverse parallel lines and the plurality of longitudinal parallel lines is 80-120 mu m, the groove width is 10-20 mu m, the groove depth is about 30-50 um, the groove parameters are adjusted by adjusting the superfast laser processing parameters, and a large number of micro-particles are covered on the inside and around the groove; the solder ball is planted on a bare chip through a heating plate, and the chip and the processed PCB substrate are welded and packaged through a hot air welding machine. The specific surface area and structural richness of the surface are improved, and the problems of poor thermal fatigue resistance and poor durability of the existing BGA package joint can be solved.

This invention belongs to the field of surface modification technology for metallic materials, and discloses a steel-based laser cladding gradient transition layer and its application. The steel-based laser cladding gradient transition layer utilizes rare-earth holmium (Ho) and in-situ TiC nanoparticles for synergistic reinforcement, resulting in a uniform and dense TiC microstructure and significantly improved high-temperature stability. The gradient composite coating employs a three-layer gradient structure—a base layer, a transition layer, and a working layer—to achieve a smooth transition in hardness and high-temperature performance, eliminating interfacial thermal stress concentration and significantly improving interlayer bonding strength and anti-stripping ability. This invention employs a layered laser cladding process to achieve a smooth transition in coating hardness and performance, effectively eliminating interfacial thermal stress concentration and improving coating bonding strength and high-temperature stability. This invention is the first to use Ho in laser cladding gradient coatings, resulting in outstanding grain refinement and grain boundary purification effects, significantly improving coating microstructure uniformity, high-temperature strength, and thermal fatigue resistance. The process is stable and reliable, suitable for industrial strengthening applications in large aluminum alloy die-cast cups.

This utility model relates to the field of engine technology, specifically disclosing a water inlet pipe, an engine cooling system, an engine, and a vehicle. The water inlet pipe includes a pipe body with an inlet for connecting to the outlet of a water pump. The pipe body also has multiple outlets, at least one of which is directly connected to the engine's coolant inlet. An internal thermostat is installed in the flow path between the remaining outlets and the engine's coolant inlet. The internal thermostat can connect or disconnect the flow path between the outlets and the engine's coolant inlet. During cold starts at low temperatures, the internal thermostat disconnects the flow path, reducing the amount of coolant entering the engine, allowing the engine to warm up quickly while ensuring a uniform temperature rise, thus delaying thermal fatigue.

This invention belongs to the field of desuperheater technology and discloses a sleeve-type desuperheater and desuperheating method. The device includes a desuperheater body and a cylinder. The desuperheater body includes a nozzle, a nitrogen inlet pipe, and a nitrogen outlet pipe. The nitrogen inlet pipe and the nitrogen outlet pipe are both connected to the nozzle. One end of the nozzle is fixedly connected to the desuperheater connector, and the other end passes through the cylinder and is fixedly connected to a positioning block fixedly installed inside the cylinder. The nitrogen inlet pipe and the nitrogen outlet pipe isolate the steam inside the cylinder from the desuperheating water inside the desuperheater connector through nitrogen. A sleeve is provided between the nozzle and the outer shell. The sleeve includes a cylinder and an annular plate. Nitrogen is introduced into and discharged through the nitrogen inlet pipe and the nitrogen outlet pipe, isolating the steam inside the cylinder from the desuperheating water at the desuperheater connector, reducing heat transfer between hot and cold media, reducing thermal stress caused by temperature difference at the weld joint, and avoiding thermal fatigue damage to the equipment during long-term operation.

The application discloses a kind of high voltage arc extinguishing devices of electric power grid, including device module, a pair of convection heat dissipation mechanism and uniform heat dissipation mechanism, a pair of convection heat dissipation mechanism is fixedly installed in the downside of device module, convection heat dissipation mechanism includes convection passage assembly, convection temperature difference component and convection cooling component, convection passage assembly is fixedly installed in the downside of device module, convection temperature difference component is set to one side of convection passage assembly, convection cooling component is fixedly installed in the upside of convection temperature difference component.The high voltage arc extinguishing devices of electric power grid of the application is set through corresponding mechanism, in the process of IGBT module high-frequency switch, can quickly cool for IGBT module, reduce its power consumption to heat-up speed, reduce the appearance of junction temperature phenomenon, not only heat dissipation effect can be guaranteed, also greatly reduce the appearance of thermal fatigue failure, effectively reduce the probability of IGBT module failure, reduce the expense of repair.

The utility model relates to a horizontal straight through-flow type steam generating mechanism, which comprises a steam furnace body, which is transversely divided into a preheating section and a heating evaporation section which are sequentially communicated with each other; the smoke collecting cavity is arranged at the top of the steam furnace body; the combustor is used for generating high-temperature flue gas; the preheating pipe is arranged in the preheating section, and the bottom of the preheating pipe is connected with an external water supply pipeline; the steam generation assembly is arranged in the heating evaporation section and comprises a plurality of vertically-through smoke exhaust tube nests arranged side by side in the transverse direction and a steam generation jacket arranged around the smoke exhaust tube nests, a steam generation cavity is further formed between the steam generation jacket and the smoke exhaust tube nests, the top ends of the smoke exhaust tube nests extend into the smoke collection cavity, and the top ends of the smoke exhaust tube nests extend into the smoke collection cavity. The bottom ends of the steam generating cavities are suspended in the steam furnace body, and the steam generating cavities are sequentially communicated in series in the transverse direction. Compared with the prior art, by optimizing and adjusting the heating layout of high-temperature flue gas to water vapor in the steam making assembly, the problem of thermal fatigue of the steam making assembly is effectively solved, and the heating efficiency is further improved.

The application discloses a laser cladding repair method for a flange furnace bottom disc of a long-service-life structure and belongs to the field of plating technology for metal materials, and aims at the green manufacturing plan of super-high-grade oriented silicon steel and comprises the following steps: performing state evaluation and pretreatment on a working surface of a bottom disc after a service cycle is completed, confirming whether the working surface is a primary service surface or a secondary service surface; pre-preparing three kinds of functional powders of substrate regeneration, A-surface thermal fatigue resistance and B-surface high-thermal-conductivity oxidation resistance; firstly, cladding a substrate regeneration layer on a surface of a substrate to reset a microstructure; secondly, selectively cladding an A-surface or a B-surface functional layer according to the attribute of the working surface to form a gradient repair structure; and finally, performing post-heat treatment. Through the differential powder system and the repair strategy, the application solves the different failure problems of the primary and secondary service surfaces and significantly improves the repair quality and the whole life cycle of the bottom disc, realizes life doubling after single repair and guarantees the product quality uniformity of the bearing silicon steel coil.

The invention discloses a PCB connecting terminal, and belongs to the technical field of connectors, the PCB connecting terminal comprises a shell and a wire pressing conductive assembly, the shell is provided with a wire plugging hole, a bolt hole and a connecting hole, the wire pressing conductive assembly is composed of at least two sub-bodies formed by integrally cutting a wire clamping piece and an equal-thickness conductive sheet body, and the sub-bodies are bent by 180 degrees through bending parts and locally fit to form fitting parts. The wiring part of each sub-body is inserted into the wire clamping piece and is conductively connected with an external wire harness, the fitting part extends downwards and branches to form independent pins which pass through the connecting holes at intervals and are welded on the PCB, and the sub-body is provided with a deformation part with at least two bending angles with opposite bending directions between the fitting part and the pins. The structure is integrally formed by cutting and folding a single metal sheet body, so that the contact resistance and the assembly tolerance of traditional multi-component assembly are eliminated, and low-impedance current distribution is realized; the deformation part can effectively absorb vibration impact energy, significantly reduce dynamic stress and thermal fatigue at a pin welding spot, and prevent sealing-off failure caused by long-term vibration.

The invention discloses an accelerated thermal shock test method for an air-cooled turbine guide vane of a combustion-driven compressor unit. The accelerated thermal shock test method comprises the following steps: step 1, determining gas thermal parameters of a test blade; 2, determining the number of single group of test blades; 3, determining the number of test groups; 4, determining a temperature load spectrum of the air-cooled turbine guide vane; step 5, carrying out a temperature debugging test on the air-cooled turbine guide vane; step 6, officially accelerating the thermal shock test; step 7, evaluating the blade state of the air-cooled turbine guide vane test; step 8, determining the thermal fatigue cycle resistance of the air-cooled turbine guide vane; step 9, performing simulation calculation on the thermal fatigue resistant cycle capability of the air-cooled turbine guide vane; and step 10, analyzing the validity of a test result. By adopting the design method provided by the invention, the thermal fatigue resistance of the air-cooled turbine guide vane of the combustion-driven compressor unit can be examined in a part state with lower technical risk and investment and under the condition close to a real working environment.

This invention discloses a device and method for eliminating thermal stratification in a pooled reactor based on compressed gas. The device includes an independent heat exchanger, a steam generator, a reactor core, a core shielding layer, a main pump, and a temperature sensor array, all housed within the pooled reactor vessel. In this invention, through a linkage mechanism between temperature monitoring and the compressed gas-driven main pump, the weak natural circulation is converted into forced convection circulation during a complete power outage and when thermal stratification occurs. This significantly enhances the disturbance and mixing of hot and cold liquid metals within the pool, effectively eliminating temperature gradients that lead to equipment thermal fatigue and improving the safety of the reactor structure under accident conditions. Unlike simple energy storage and release, by incorporating a preheater, the residual heat from the reactor core is used to reheat and pressurize the compressed gas. This not only recovers some waste heat but also enhances the work capacity of the gas-driven turbine, achieving energy recovery and ensuring the power redundancy required to drive the main pump.

The invention relates to a cast aluminum alloy material with high strength and excellent conductivity and a preparation method and application thereof, and belongs to the technical field of motor rotors. The cast aluminum alloy material provided by the invention comprises the following components in percentage by mass: 0.15 to 0.4 weight percent of iron, 0.4 to 0.8 weight percent of magnesium and 0.2 to 0.5 weight percent of IVA group elements. According to the cast aluminum alloy material, 0.15-0.4 wt% of iron, 0.4-0.8 wt% of magnesium and 0.2-0.5 wt% of IVA group elements are added, the surface tension of a melt in the casting process can be reduced, so that the fluidity of the melt is improved, the strength of an aluminum alloy rotor prepared from the material is improved, the aluminum alloy rotor can have good strength performance and processing plasticity, and the service life of the aluminum alloy rotor is prolonged. And the conductivity and the thermal fatigue resistance are also obviously improved due to the improvement of the plasticity.

The invention relates to a thermal fatigue resistant commercial vehicle brake disc and a preparation method thereof. A preparation method of the thermal-fatigue-resistant commercial vehicle brake disc comprises the steps that S1, raw materials are added into a smelting furnace to be smelted, and molten iron is obtained; s2, a ferrosilicon inoculant, a nitriding agent, ferromolybdenum and tin are added into a transfer ladle, and molten iron is injected into the transfer ladle for primary inoculation treatment; the use amount of the ferrosilicon inoculant is 0.30-0.45% of the mass of the molten iron, the use amount of the nitriding agent is 0.60% of the mass of the molten iron, the use amount of the ferromolybdenum is 0.60-0.65% of the mass of the molten iron, and the use amount of the tin is 0.06% of the mass of the molten iron; and S3, the molten iron obtained after primary inoculation treatment is transferred into a pouring ladle, then the molten iron is poured into a cavity of a brake disc pouring mold, a silicon-strontium-zirconium inoculant is added along with the flow during pouring for secondary inoculation treatment, and the brake disc is obtained after cooling.