1207 results about "Thermal cycle" patented technology

The invention relates to the technical field of data center heat dissipation, and particularly provides a single-phase and two-phase immersion liquid cooling method and system based on AI intelligent decision, and the method comprises the steps: injecting coupled data into a dynamic feature extraction engine, and outputting a thermodynamic state evolution tensor which comprises the characteristics of a temperature change rate, a load-heat flux density coupling coefficient and the like; the thermodynamic state evolution tensor is input into the deep neural network model, the temperature and pressure matched with the current thermodynamic state evolution tensor are calculated, and a closed-loop control instruction set capable of being executed by equipment is generated; a closed-loop control instruction set is injected into an execution mechanism set, execution mechanisms execute power reconstruction and flow channel switching according to instructions, gaseous fluorinated liquid is liquefied and flows back through an efficient condenser in a two-phase mode, and heat dissipation mode self-adaptive switching and heat cycle reconstruction are achieved. The system comprises a server, an AI algorithm controller, a cooling liquid storage device, a condenser, a circulating pump, an electric valve, a pressure release valve and a temperature sensor. The heat dissipation efficiency and the system reliability are remarkably improved.

The invention discloses a copper bar connection state detection method and system, particularly relates to the technical field of copper bar state detection, and is used for solving the problem of poor early recognition of copper bar connection deterioration. According to the method, resistance and temperature rise conditions at the joint of the copper bars are measured synchronously in the load change process, signal denoising is realized in combination with finite difference filtering, and characteristic evolution conditions at the joint are captured; the method comprises the steps of determining an analysis window based on a real-time load change event, constructing a thermoelectric track point set and dividing a load rising and falling period, forming a continuous dynamic thermoelectric response curve, dividing a temperature rising track and a temperature falling track through a temperature change trend, extracting a resistance drift amount and a hysteresis loop area, and identifying a connection degradation trend and a structure fatigue characteristic. And connection state information generated by thermal stress action and thermal cycle asymmetry is obtained during load change, and a detection strategy is adjusted according to an analysis result, so that early degradation identification and intelligent risk grading of the copper bar connection state are carried out, and the sensitivity and accuracy of copper bar detection are improved.

Integrated intelligent system for beverage production, including distilled spirits and various brewed or fermented products, combining traditional methods with advanced technologies. System incorporates controlled fermentation unit, advanced distillation apparatus, and accelerated aging unit using novel methods like ultrasonic waves and thermal cycling. Real-time analysis system employs multiple sensors for continuous chemical composition monitoring throughout production process. Intelligent control mechanism optimizes processes and adjusts parameters dynamically. Chemical fingerprinting system enables precise quality control and authenticity verification. Flexible interface allows for customization of beverage profiles based on desired flavor characteristics and market demands. Specialized unit creates complex non- alcoholic alternatives. System adapts to different production scales and beverage types. Represents significant advancement in beverage production technology, offering unprecedented control, consistency, efficiency, and rapid product development across various beverage categories.

The invention discloses an ocean temperature difference coupled offshore constant-pressure compressed carbon dioxide energy storage system and method, and relates to the technical field of compressed gas energy storage. The system comprises a working medium constant-pressure storage device, a carbon dioxide energy storage circulation loop, a carbon dioxide energy release circulation loop and a heat storage circulation loop. Gaseous carbon dioxide is condensed into a liquid state by utilizing deep sea low-temperature seawater in an energy storage stage, liquid carbon dioxide is evaporated into a gaseous state by utilizing shallow sea high-temperature seawater in an energy release stage, and gas-liquid conversion of carbon dioxide is realized by fully utilizing ocean new energy and ocean temperature difference; the flexible working medium constant-pressure storage device is used for storing low-pressure gaseous carbon dioxide and high-pressure liquid carbon dioxide, the constant pressure of the working medium constant-pressure storage device in the charging and discharging process can be guaranteed, and efficient and stable operation of the system is achieved. Efficient liquefaction and high-density storage of high-pressure carbon dioxide are achieved through the ocean temperature difference and seawater static pressure, the efficiency and energy density of the energy storage system are improved, and deep development of offshore resources is achieved.

The invention discloses a whole welding process quality regulation and control method of a welding robot, and relates to the technical field related to welding. The method at least comprises the steps that S1, a pre-welding parameter drawing technology is designed, welding numerical simulation analysis is conducted to predict optimal welding parameters, the optimal welding parameters are compared with a thermal cycle curve of a test, the accuracy of a model is verified, the predicted parameters are input into a welding robot, and the welding prediction effect is achieved; and S2, designing a welding molten pool regulation and control technology, collecting a molten pool image through an industrial camera, processing the collected molten pool image, then building a molten pool monitoring platform, and regulating and controlling the quality of the molten pool during welding through the platform. According to the method, a proper welding quality guarantee strategy of the welding robot is provided, and the welding quality of the welding robot is guaranteed in the whole process of pre-welding, during-welding and after-welding through the cooperative design of pre-welding parameter drawing-up based on the numerical simulation technology, during-welding molten pool monitoring based on camera recognition and after-welding quality study and judgment based on deep learning.

The invention discloses a crack propagation simulation analysis method based on a real-structure thermal barrier coating under cyclic load, which comprises the following steps: creating a finite element model according to a thermal barrier coating sample; setting material attributes and section characteristics in the finite element model; after parameters are set, a thermal cycle load is applied to the surface of the finite element model, analysis is carried out after grid division, and an Odb file is obtained; and copying the finite element model, taking the Odb file as a boundary condition, and carrying out thermal-mechanical coupling to obtain thermal stress and crack expansion conditions after thermal circulation. The analysis method is simple, the real service condition and the microstructure are fitted, the expected research effect is achieved for finite element simulation, and accurate simulation data can be obtained.

The invention discloses a multi-dimensional monitoring and early warning method and system for an adsorption and compression carbon dioxide energy storage system. The method comprises the following steps: step 1, collecting and preprocessing multi-source data in real time; step 2, key parameter calculation and abnormal feature identification; step 3, multi-dimensional data fusion and risk index generation; 4, performing graded early warning triggering and emergency response; and 5, dynamic optimization and feedback adjustment are carried out. The system comprises an energy storage process monitoring module, an energy release process monitoring module, a storage tank safety monitoring module, a thermodynamic cycle monitoring module and an abnormity early warning module. Compared with the prior art, the system has the advantages of full-process coverage, intelligent early warning, dynamic optimization and high reliability, intelligent monitoring and accurate early warning of the full process of the carbon dioxide energy storage system are achieved, and the safety and the operation efficiency of the system are remarkably improved.

The invention provides a method for obtaining the optimal low-temperature impact toughness and a welded body, and the method comprises the following steps: S1, obtaining chemical components of sample steel, and calculating the cooling rate corresponding to the bainite phase change curve nose tip temperature of the sample steel; s2, the cooling rate serves as the key cooling rate of the welding heat cycle process, and the corresponding welding heat input amount is calculated; s3, cutting a plurality of cuboid thermal simulation initial samples of which the length directions are parallel to the rolling direction of the steel plate from the sample steel; s4, two-pass welding thermal simulation cycle experiments at different temperatures are set; s5, two thermocouples are welded to the center of the cuboid thermal simulation initial sample for temperature measurement, and a welding simulation experiment is completed; and S6, size machining is conducted on the welding sample, a low-temperature impact experiment is conducted, impact energy under different technologies is measured, and the optimal impact toughness of CGHAZ and ICCGHAZ is determined. The method can be used for developing and optimizing the welding process with insufficient low-temperature impact toughness of the submerged-arc welding heat affected zone of the low alloy steel.

The invention provides a spacecraft quartz powder heat insulation tile which is prepared by adopting high-purity quartz powder (SiO2) as a main raw material and combining a high-temperature-resistant ceramic fiber reinforcement and a nano aerogel heat insulation layer through a high-temperature sintering process. The heat insulation tile has the following advantages: 1, the heat insulation tile has excellent high temperature resistance, and can tolerate 1600 DEG C high temperature for a long time and tolerate 1800 DEG C instantaneous thermal shock for a short time; 2, repeated use: the structure is stable, and high strength is still kept after multiple thermal cycles; light weight: the density is low (less than or equal to 0.5 g / cm < 3 >), and the load of a spacecraft is reduced; and 4, the thermal conductivity is low (less than or equal to 0.05 W / m.K), and heat transfer is effectively isolated. The method is suitable for thermal protection systems (TPS) of spacecrafts, such as thermal insulation of reentry capsules and rocket engine nozzles.

The invention relates to the technical field of aero-engines, in particular to an aero-engine thermal barrier coating working condition simulation experiment system which comprises a high-temperature thermal cycle module, a high-speed airflow scouring module, a high-pressure loading module, an atmosphere control module and a data monitoring and collecting module. The high-temperature thermal cycle module is used for realizing rapid heating and cooling so as to simulate a thermal environment; the high-speed airflow scouring module is used for generating high-speed airflow to simulate gas scouring; the coating performance can be accurately evaluated through the multi-working-condition high-precision simulation capability, research and development personnel can be assisted to optimize components and structures, coating defects and weak points can be rapidly and accurately found through strict working condition simulation in the aspect of quality detection, the product quality is guaranteed, the defective rate is reduced, and the method has good application prospects from cost benefit consideration. The test frequency and the part replacement cost caused by the coating problem in engine research and development are reduced, the research and development period is shortened, the performance and reliability of the aero-engine are greatly improved, the development of the aerospace industry is powerfully promoted, and a solid foundation is laid for advanced engine research and development.

The invention discloses an intelligent thermal management method and system for a power battery, and the method comprises the steps: obtaining current vehicle driving state data, and recognizing whether a vehicle enters a driving mode or not and whether a driving thermal management process is started or not; obtaining current driving working condition state data, and calculating vehicle demand power and battery allowable power based on the vehicle historical power and the current power data; obtaining current power battery temperature state data, judging a current driving thermal management requirement, and adaptively switching a management process corresponding to a thermal management strategy; and obtaining the current temperature of the cooling liquid at the inlet of the power battery, and judging whether to start thermal management or perform thermal cycle. According to the method, by judging the relation between the whole vehicle demand power and the battery allowable discharge power, under the condition that the whole vehicle power use and the battery safety are not affected, the heat management starting frequency is reduced to optimize the heat management energy consumption; heat management energy is fully utilized, the purpose of meeting the required power of the whole vehicle is achieved, unnecessary heat management can be effectively reduced, and heat management energy consumption is reduced.

The invention relates to a chip integrated heat dissipation system and a preparation method thereof, and belongs to the technical field of heat dissipation of semiconductor devices. The chip integrated heat dissipation system comprises a nano-diamond transition layer attached to a chip. A micro-column array supporting layer is arranged on one side, far away from the chip, of the nano-diamond transition layer; the micro-column array supporting layer is in contact with one surface of the diamond film, and the other surface of the diamond film is attached to the three-dimensional micro-channel heat dissipation layer. The invention also provides a preparation method of the chip integrated heat dissipation system. The chip integrated heat dissipation system provided by the invention has the advantage of efficient heat dissipation, and through the combination of the three-dimensional structure and the high heat conduction characteristic of diamond, the heat dissipation power density is remarkably improved, the junction temperature of the chip is reduced, and the heat dissipation requirement of a high-power device is met. The heat dissipation performance reliability is high, the thermal stress is eliminated through the gradient structure design, the interlayer binding force is improved, and the stable performance is still kept after multiple thermal cycles. And the preparation process is good in compatibility and convenient for large-scale production.

The invention relates to the technical field of ceramics, and discloses an aluminum oxide ceramic glaze based on domestic waste ceramics, and a preparation method and application thereof. The aluminum oxide ceramic glaze comprises the following raw materials in parts by weight: 28-42 parts of domestic waste ceramic, 25-30 parts of kaolin, 6-12 parts of calcined talc, 3-7 parts of borax, 6-14 parts of aluminum oxide, 3-5 parts of zirconium oxide, 1-3 parts of lanthanum oxide and 3-6 parts of self-repairing particles. The self-repairing particles comprise mesoporous alumina doped with Si and Zr, and V2O5-B2O3-TeO2 series glass which is filled in pores of the mesoporous alumina and has a softening point of 200-300 DEG C. After the glaze is applied to the surface of the aluminum oxide ceramic to form a glaze layer, the insulativity of the aluminum oxide ceramic can be effectively improved, meanwhile, the high bonding stability between the glaze layer and the aluminum oxide ceramic can be achieved, and the problems that the insulativity is greatly reduced and the glaze layer cracks during heat circulation are solved.

The invention relates to the technical field of cables, and provides a high-temperature-resistant flame-retardant power cable and a preparation method thereof. A high-temperature-resistant flame-retardant power cable comprises a conductor and a high-temperature-resistant flame-retardant outer layer wrapping the conductor. The high-temperature-resistant flame-retardant outer layer is prepared from the following raw materials in parts by weight: linear low-density polyethylene, an ethylene-vinyl acetate copolymer, ethylene propylene diene monomer, chopped polyimide fibers, nano-coated magnesium hydroxide, zinc borate, zinc stannate, polyethylene grafted maleic anhydride, an anti-aging agent, dicumyl peroxide, an antioxidant, polyethylene wax, calcium stearate and cerium dioxide. According to the cable prepared in the invention, the reliability of an existing high-temperature-resistant flame-retardant power cable under thermal cycle is improved, and the problem of local temperature resistance difference caused by agglomeration and high-temperature migration of nanoparticles in a polymer matrix is improved.

The invention discloses a photo-thermal amplification and real-time PCR (polymerase chain reaction) detection integrated optical fiber system, and relates to the field of pathogen testing, the optical fiber system comprises an optical fiber probe, a photo-thermal photosensitizer and a micro reaction chamber; the micro-reaction chamber is used for extracting and discharging a to-be-detected sample by utilizing air pressure, the optical fiber probe is arranged in the micro-reaction chamber, and the optical fiber probe reacts with the to-be-detected sample in the micro-reaction chamber; the photo-thermal photosensitizer is arranged inside or on the outer surface of the optical fiber probe and is used for receiving heat generated by the heating light to heat the optical fiber probe and controlling the reaction temperature of the optical fiber probe and the to-be-detected sample; the optical fiber probe is also used for receiving the exciting light which excites the to-be-detected sample to generate a fluorescence signal, and the optical fiber probe is used for detecting the fluorescence signal. According to the application, sample collection, photo-thermal cycle amplification and real-time fluorescent quantitative detection can be integrated, and rapid and effective detection of a virus sample is realized.

The invention relates to the technical field of oil and gas reservoir exploitation equipment, in particular to a compression type metal packer which is used for solving the problem that a high-temperature and high-pressure deep well rubber cylinder serving as a sealing element cannot meet operation requirements, and the compression type metal packer comprises a first connector and a second connector which are connected to the upper end and the lower end of a central pipe; a sealing mechanism is arranged in the middle of the central pipe and comprises a metal sealing cylinder, a sealing ring and a sealing ring; the upper sealing cone sleeves the central pipe and is arranged at the upper part of the metal sealing cylinder; the lower sealing cone sleeves the central pipe and is arranged at the lower part of the metal sealing cylinder; the metal sealing cylinder is made of nickel-titanium-based superelastic alloy; the metal sealing cylinder is made of nickel-titanium-based superelastic alloy, annealing treatment is conducted at the temperature of 650 DEG C, thermal circulation and mechanical training are conducted at the temperature above the phase change temperature, the stable mechanical performance is obtained, the ideal deformation rate can be obtained under the small load effect, the setting force and the unsetting force are reduced, and the metal sealing cylinder is suitable for high-temperature and high-pressure deep well operation.

The invention relates to a three-dimensional network carbide reinforced refractory alloy and a preparation method thereof, and belongs to the technical field of alloy material preparation. The three-dimensional network carbide reinforced refractory alloy is composed of a BCC matrix phase and a large number of dispersed three-dimensional network carbide reinforced phases, and the crystal structure of the carbide is M2C or MC type and is in a complete coherent relationship with the BCC matrix. The method has high adaptability, the applicable refractory alloy material range is wide, particularly fine component design is not needed, the process window is wide, and operation is easy. According to the material prepared by the method, a carbide phase and a matrix are coherent, the bonding strength is high, the stability is good, and repeated thermal cycle can be endured. According to the method, integration of material preparation and component forming can be achieved, high-freedom-degree direct forming of complex three-dimensional parts is directly achieved, and the forming requirement in the actual using process can be met to a great extent.

The invention relates to the technical field of aluminum alloy material performance analysis, in particular to a performance analysis method of an aluminum alloy material. The method comprises the following steps that aluminum alloy material data are collected, and component data of an aluminum alloy material are obtained through component detection; performing initial property analysis on the aluminum alloy material to obtain physical and mechanical property data of the material; carrying out bearing capacity estimation on the aluminum alloy material through load simulation, and carrying out thermal cycle threshold calculation on the material in combination with thermal cycle simulation to obtain thermal cycle performance data of the aluminum alloy material; the comprehensive performance of the aluminum alloy material is analyzed based on the thermal cycle threshold value and the bearing capacity data, the performance of the aluminum alloy material under different working conditions is evaluated, the composition proportion of the aluminum alloy material is optimized according to the performance data of the material, and the optimal material performance is obtained. By optimizing the components of the aluminum alloy material, the performance of the aluminum alloy material is more stable.

The invention relates to the technical field of thermal insulation decorative plates. A base body layer is prepared from the following raw materials in parts by weight: 25 to 30 parts of quartz, 10 to 15 parts of clay, 8 to 12 parts of fly ash, 7 to 11 parts of a binding and balancing agent, 6 to 9 parts of a talc powder modified tonality agent, 5 to 8 parts of glass beads, 4 to 7 parts of a flame retardant, 2 to 4 parts of a dispersing agent, 1 to 3 parts of a foaming agent and 20 to 25 parts of deionized water. The thermal insulation and decoration integrated board is prepared by matching the base body layer with the facing layer, the base body layer is prepared by blending and coordinating quartz, clay and fly ash with glass beads, a flame retardant, a dispersing agent and a foaming agent, and the added coupling and balancing agent and the added adjusting agent modified by blended talcum powder are matched and jointly synergic, so that the thermal insulation and decoration integrated board is prepared. The thermal insulation property, the impact resistance and the fire resistance of the product are improved in a balanced and coordinated manner, and meanwhile, the product has remarkable water resistance, acid corrosion resistance and thermal cycling stability.

The invention provides an LNG ship pipe fitting fatigue life modeling optimization method and system. The method comprises the steps that a fatigue life simulation model of a low-temperature pipe fitting is established; fatigue state constraint is applied to a fatigue damage structure in the fatigue life simulation model based on the load spectrum and the temperature spectrum at the monitoring node, and a damage constraint condition of the target low-temperature pipe fitting in a vibration state is obtained; determining the thermal fatigue loss of fatigue life simulation under different low-temperature thermal cycle loads according to the thermal fatigue damage and load spectrum characteristics of each connection part under different low-temperature thermal cycle loads; cost optimization is carried out on fatigue life control parameters of the fatigue life simulation model according to the damage constraint conditions and all the thermal fatigue losses, optimal cost parameters for fatigue life simulation under the thermal-vibration load working condition are obtained, and the local grid density of the fatigue life simulation model is adjusted based on the optimal cost parameters. By the adoption of the scheme, parameter cost optimization of the fatigue life simulation model of the LNG ship pipe fitting under the thermal-vibration load working condition can be achieved.

The invention relates to the technical field of pipe truss tubular joint welding quality control, in particular to an assembly type pipe truss tubular joint butt-joint tensioning anti-deformation welding method and system which comprises the following steps that S1, an intersecting line is divided in the circumferential direction, and butt-joint references and deformation monitoring point positions of all partitions are calibrated; s2, circumferential distributed tensioning force application point positions are set; s3, a differential pre-tightening force gradient in the circumferential direction of the intersecting line is set, and pre-tensioning force is applied; s4, synchronous cooperation of tensioning actions and deformation control of all the to-be-welded nodes is carried out; s5, welding is conducted in a partitioned and segmented mode, and the pre-tensioning force of the partition corresponding to the intersecting line is dynamically adjusted in the welding process; and S6, after welding, the pre-tensioning force of each subarea is released, and node deformation checking and precision correction are synchronously completed after force release. According to the dynamic pre-tightening force adjusting method for partition differentiation pre-tightening force gradient distribution and welding thermal cycle time sequence matching, the residual stress peak value of the node core area is greatly reduced, and the welding quality and the structural safety of the tubular node are remarkably improved.

The invention belongs to the technical field of protective coatings, and particularly relates to a titanium alloy surface anti-oxidation coating and a preparation method. The diffusion aluminide coating with the aluminum content gradually reduced from outside to inside is prepared on the surface of the titanium alloy, and the coating is free of penetrating cracks and can contain elements such as Si. Firstly, an aluminum or aluminum alloy coating is pre-deposited on the surface of the titanium alloy, and then the diffusion aluminide coating is prepared through thermal diffusion treatment under vacuum. By adopting the method, not only is the prepared coating free of penetrating cracks, but also the formation of the cracks is inhibited in the thermal cycle process, and the high-temperature oxidation resistance of the coating is excellent.

The invention relates to the technical field of power generation system transformation, in particular to an energy storage power generation system and method based on thermal power plant transformation. The Carnot battery unit comprises a liquid carbon dioxide storage tank, an electric heater, a compressor, a heat storage transducer heat flow channel and an expansion machine which are connected in sequence, and the liquid carbon dioxide storage tank adopts a boiler drum of a thermal power plant and stores liquid carbon dioxide liquefied by a water chilling unit of the thermal power plant; the heat storage circulating unit exchanges heat with a heat flow channel of the heat storage transducer to store heat; the steam power generation unit adopts a thermal power plant steam generator set and extracts heat stored by the heat storage circulation unit for steam power generation. The thermal power generating unit is transformed into the carbon dioxide Carnot battery energy storage system, the defect that a power grid is unstable in the process that a traditional thermal power plant is gradually converted into new energy is overcome, double stable output electric quantity is achieved, the system efficiency is improved, and meanwhile high economic benefits are achieved.

The invention relates to an improved photoelectric coupler packaging electroplating technology which comprises the following steps that S10, self-repairing microcapsules are dispersed into electroplating liquid, the microcapsules comprise wall materials and core materials, and the core materials comprise vinyl siloxane and chloroplatinic acid catalysts; s20, sequentially forming a nano gradient composite coating structure on the surface of the substrate, wherein the composite coating structure comprises a substrate layer, a transition layer, a main functional layer and a packaging layer; and S30, carrying out micro-area deposition by adopting a light-induced selective electroplating process, wherein the micro-area deposition comprises laser micro-area activation, pulse electroplating deposition and in-situ ultraviolet curing. According to the electroplating process, through the nanometer gradient composite coating structure, the interface stress concentration is reduced through layer-by-layer transition of the material and the thickness, the thermal cycle resistance of the coating is improved, and meanwhile the balance among conductivity, mechanical strength and thermal stability is achieved.

An electronic package provides a plurality of conductive posts having separable blocks and a first electronic component having a separable block, and a cladding layer wraps the first electronic component, the separable blocks and the conductive posts to expose the separable blocks out of a surface of the cladding layer, and then the separable blocks are removed to form a plurality of conductive posts having a plurality of separable blocks and a plurality of conductive posts having a plurality of separable blocks and a plurality of conductive posts having a plurality of separable blocks and a plurality of conductive posts having a plurality of separable blocks. And a plurality of conductive columns are arranged on the surface of the cladding layer so as to form a plurality of concave parts on the surface of the cladding layer, and the plurality of conductive columns and the first electronic element are exposed out of the concave parts, so that through the design of the concave parts, the contact area between a circuit part subsequently formed on the cladding layer and the cladding layer is increased, and the condition of delamination of the circuit part is avoided during thermal circulation.

The present disclosure provides a prediction method of electrochemical and mechanical performances of a Solid Oxide Fuel Cell (SOFC) in a cold-hot cycle, and belongs to the technical field of SOFCs. In the present disclosure, a cold-hot cycle test is performed on SOFC pile, a polarization curve and an electrochemical impedance spectroscopy are measured by an electrochemical workstation, and contributions of different electrode reaction processes to voltage attenuation are analyzed quantitatively; the mechanical performance (bending strength, elastic modulus and hardness) after different numbers of cold-hot cycle services is tested, and based on change of Ni particles, the electrochemical performance and the mechanical performance of the SOFC pile are quantitatively associated; an attenuation coupling relationship of the electrochemical performance and the mechanical performance of the SOFC pile is disclosed and an attenuation theory model of the electrochemical performance and the mechanical performance of the SOFC pile is built. In this way, a change law of the electrochemical performance and the mechanical performance of the SOFC pile after different numbers of cold-hot cycles and a cold-hot cycle service life of the SOFC pile can be accurately predicted, which is of great significance to improve the thermal shock resistance of the cold-hot cycles of the SOFC pile, so as to promote SOFC commercialization applications.

The invention discloses a walk-in high and low temperature test box for automobile testing in the technical field of walk-in high and low temperature tests for automobile testing, which comprises a high and low temperature test box body, a sealing opening and closing door is arranged on one side of the high and low temperature test box body, and a temperature output assembly is arranged on the other side of the inner cavity of the high and low temperature test box body. According to the invention, refrigeration and heating cycle adjustment is facilitated through the temperature output assembly, independent work output of refrigeration and heating equipment is not needed, the configuration cost is low, the operation is simple, the operation is convenient, the cost is low, the operation is convenient, and the test efficiency is high. The space occupation ratio is small, operation is convenient and fast, during refrigerating or heating, the motor execution end drives the other end of the connected worm to be rotationally connected to the side wall of an inner cavity of the square shell for supporting rotation, and rotation of the worm drives a worm gear meshed with one side to be rotationally connected with an inner ring of a bearing part through the bottom for fixed supporting rotation.

The invention provides a thermal cycle period customized thermal fatigue test method and equipment, the equipment comprises a rotation system, a heating unit, a cooling unit, a temperature detection probe, a temperature detector and a temperature controller, the temperature controller outputs signals to control the rotation system and a temperature adjusting system, thermal and cold circulation of a workpiece is realized, and the thermal fatigue test efficiency is improved. The temperature value of the sample in the whole cycle period is obtained through signal input of the temperature detector, the temperature controller compares the temperature fed back by the temperature detector with the set temperature, then the rotating system, the cooling unit and the heating unit are regulated and controlled and optimized continuously, and fitting of temperature waveforms is achieved. According to the equipment, through cooperative work of the temperature controller, the temperature adjusting system, the temperature detector and the rotating system, temperature control and rotating control on the sample placing platform are realized, so that the thermal fatigue test requirements of the same test material under various working conditions are met.

The invention relates to the technical field of molten salt, in particular to nitro binary molten salt and a preparation method thereof. The preparation method comprises the following steps: mixing sodium carbonate and a potassium hydroxide solution, and then adding a starch-based grafted crystal inhibitor to inhibit crystallization; adding a nitric acid aqueous solution in two stages, and introducing eutectic seed crystals to guide nucleation at the end of the first stage; crystal distribution is optimized through falling film evaporation and concentration and setting of partial reflux; and after spraying granulation, carrying out short-time melting reforming and controlled cooling in an inert atmosphere. According to the method, the composition uniformity and the structural stability of the molten salt are remarkably improved, so that the product has a melting point close to a theoretical eutectic point, low supercooling degree, high melting latent heat and excellent thermal cycling stability and corrosion resistance, and is suitable for an industrial heat storage system running for a long time.

The invention provides a water-cooled wall safety monitoring method and a combustion adjustment control method based on distributed optical fiber sensing, and the method specifically comprises the following steps: arranging a Bragg grating on a water-cooled wall, and obtaining the Bragg wavelength offset; predicting a temperature value and a strain value at the current moment according to historical temperature and strain data by using a state equation of stress and temperature; the Bragg wavelength prediction offset is obtained by combining the temperature value and the strain value at the current moment with the sensor error; obtaining a wavelength change residual error according to the Bragg wavelength offset and the Bragg wavelength prediction offset, and correcting the temperature value and the strain value at the current moment by using the wavelength change residual error to obtain a real temperature value and a real strain value at the current moment; a real strain value at the current moment is converted into a stress value, a water-cooled wall tearing factor is established by utilizing the stress value, the number of thermal cycles and the fatigue life of a water-cooled wall material, water-cooled wall safety monitoring and combustion adjustment control are realized by utilizing the water-cooled wall tearing factor, and the operation safety of the boiler is improved.