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328 results about "Thermal force" patented technology
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Defect repairing method based on digital twinning and friction stir welding technology
The invention discloses a defect repair method based on digital twinning and friction stir welding technologies, and relates to the technical field of intelligent manufacturing and digital twinning, and the defect repair method comprises the following steps: synchronously capturing full-dimensional data of a welding area through a multi-mode sensor array integrated by an actuator; secondly, segmenting defect boundaries by adopting a deep learning algorithm, constructing a dynamic twin model in combination with thermal-force field coupling simulation, and accurately mapping defect three-dimensional features; generating a repair track according to the twinborn model, converting the repair track into a robot joint instruction through a curved surface parameterization mapping algorithm, and implanting real-time anti-collision constraint; in the repairing process, based on reinforcement learning control of the material rheological resistance and the temperature gradient, the rotating speed, the advancing speed and the down force of the tool are dynamically adjusted; and after repairing, micro-focus CT scanning is started immediately, actually measured data is compared with twinborn prediction, and when the deviation exceeds a threshold value, a re-repairing process is triggered automatically. The method solves the problems that a traditional method depends on manual intervention and the precision of a sensor is easily interfered by the environment.
Owner:SOUTHWEST TECHNICAL ENGINEERING RESEARCH INSTITUTE OF CHINA SOUTH IND GROUP
Rapid forming control system and control method for tempered glass production
The invention relates to the technical field of glass hot working control, and discloses a rapid prototyping control system and a rapid prototyping control method for tempered glass production. Comprising a thermal coupling module, a temperature control decision module, a flow field solving module, a photoelastic stress analysis module, a quantum annealing optimization module and a time domain synchronous control module. According to the system, a three-dimensional thermal-stress field is constructed on the basis of physical properties and thermal boundaries of glass, heating power is predicted through reinforcement learning, flow field simulation and stress image analysis are combined, control parameter self-adaptive adjustment is achieved through quantum annealing optimization, beats of all subsystems are coordinated through a synchronization module, and an efficient closed-loop control structure is formed. By introducing the quantum annealing optimization module, parameter adjustment in the control system is optimized, the technical effect of improving the precision of complex control decisions is achieved, and the optimization speed and the decision quality of the system are improved.
Owner:廖俊生
Thermal mechanical composite fatigue test equipment for turbine blade in rotating environment
ActiveCN121364073AGas-turbine engine testingJet-propulsion engine testingCombustion chamberSpray cooling
The invention belongs to the technical field of aero-engine high-temperature part test, and particularly relates to a thermal mechanical composite fatigue test device in a turbine blade rotation environment, which comprises a high-temperature gas system, a stator system, a rotor system, a support system, a test system, an auxiliary system and a turbine rotor blade test piece, the high-temperature fuel gas system is used for providing a fuel gas environment for a turbine rotor blade test piece and controlling the high-low temperature circulation state of fuel gas, a combustion chamber is arranged at the front end of the high-temperature fuel gas system and provided with a double-oil-way nozzle, a fuel gas flowing system is arranged at the rear end of the high-temperature fuel gas system, and a blade grid structure is designed for the fuel gas flowing system according to the geometrical shape of a turbine rotor blade. And a spray cooling section is arranged at the rear part of the test section. The device is composed of six core systems including a high-temperature fuel gas system, a stator system, a rotor system, a supporting system, a testing system and an auxiliary system, all the systems work cooperatively, and integrated simulation of the high-temperature fuel gas environment, rotating centrifugal loads and heat-force synchronous circulation is achieved.
Owner:SHENYANG AVIATION FUEL TECH CO LTD
Internal combustion engine thermal characteristic virtual sensing method
The invention discloses a virtual sensing method for thermal characteristics of an internal combustion engine. The method comprises the following steps: S1, acquiring temperature distribution data; s2, time sequence temperature data mapping; s3, acquiring fusion temperature data; s4, obtaining thermal characteristics; and S5, abnormal judgment of a combustion chamber, an exhaust pipeline and a cooling system. According to the method, the comprehensiveness and the accuracy of thermal state analysis are remarkably improved by constructing a global sensing system of a three-dimensional space temperature field of the internal combustion engine and combining a multi-source sensor collaborative acquisition and deep learning feature fusion mechanism. Through closed-loop coupling of time-space sequence temperature data and a thermodynamic mechanism model, quantitative correlation between thermal characteristics and combustion efficiency, heat energy loss and cooling efficiency core performance parameters is established. According to the LSTM-CNN-MLP collaborative framework, the spatio-temporal evolution law of a temperature field is extracted in a self-adaptive mode, and the robustness of thermodynamic state perception is remarkably enhanced.
Owner:GUANGXI UNIV +1
Thermal-mechanical-metallurgical coupling numerical simulation method for low alloy steel welding and additive manufacturing
PendingCN121052035ADesign optimisation/simulationConstraint-based CADHeat-affected zoneThermal force
The invention discloses a thermal-mechanical-metallurgical coupling numerical simulation method for low alloy steel welding and additive manufacturing, which comprises the following steps of: S1, constructing a three-dimensional model of a test piece according to the geometric size and the size of a heat affected zone of the test piece after welding or additive manufacturing, performing grid division to form grid units, and endowing the grid units with material attributes; s2, endowing the grid units with thermophysical attributes, introducing an external heat source model, solving the change of a temperature field along with time by using a finite element method until all the grid units are cooled to a set environment temperature, and exporting a temperature field model; s3, simulating a phase change process under any thermal process; and S4, calculating a stress-strain field and a displacement field by taking the temperature field model in the step S2 and the phase fraction model in the step S3 as driving external force. The temperature, phase fraction, stress-strain and displacement changes in the low alloy steel welding and additive manufacturing process can be predicted and analyzed faster and more comprehensively, the design period is shortened, and the economical efficiency of the implementation process is promoted.
Owner:JURASSIC MARKREWEI EQUIP TECH CO LTD
Corrosion product deposition behavior numerical simulation analysis method and related device
The invention relates to a corrosion product deposition behavior numerical simulation analysis method and a related device, which are applied to a heat exchanger of a nuclear power plant residual heat removal system, and the method comprises the following steps: S1, establishing a three-dimensional geometric model corresponding to the heat exchanger based on a CFD platform; s2, performing grid division on the three-dimensional geometric model, setting boundary conditions and initial conditions of the three-dimensional geometric model, and establishing a thermal hydraulic model corresponding to the three-dimensional geometric model according to the grid division, the boundary conditions and the initial conditions; s3, calculating the thermal hydraulic model based on a FLUENT platform to obtain a temperature calculation result of a preset position of the heat exchanger; and S4, when the temperature calculation result meets the design value requirement, a corrosion product deposition and migration coupling model corresponding to the heat exchanger is established, and a sediment distribution result corresponding to the heat exchanger is calculated through the corrosion product deposition and migration coupling model based on the thermal hydraulic model. The method can predict the influence of corrosion product migration and deposition on the thermal performance of the heat exchanger.
Owner:SUZHOU NUCLEAR POWER RES INST CO LTD +1
Connecting device with function of dynamically adjusting clamping force
PendingCN120895918ACoupling device detailsClamped/spring connectionsThermal forceMonitoring and control
Owner:NINGDONG POWER SUPPLY COMPANY OF STATE GRID NINGXIA ELECTRIC POWER
Processing detection system and detection device for hydraulic shaft sleeve
The invention relates to the field of precision machining detection, and discloses a hydraulic shaft sleeve machining detection system and detection device which comprises a pneumatic servo control module, a signal collecting and processing module and a thermal inversion calculation module. The pneumatic servo control module drives the overturning air cylinder to apply a composite pressure waveform containing a static reference and a periodic flutter component to the hydraulic sleeve; the signal acquisition and processing module performs frequency domain analysis on a displacement signal detected by the displacement sensor and separates average displacement and displacement amplitude; the thermal inversion calculation module calculates real-time dynamic stiffness according to the displacement amplitude, a material stiffness thermal softening model is used for reversely deducing a temperature rise value, thermal expansion and elastic deformation errors are stripped through multi-dimensional error decoupling operation, and real height data under the standard temperature and without external force are calculated. According to the invention, active excitation and frequency domain analysis technologies are utilized, so that the interference of an oil film and thermal deformation is effectively solved, and high-precision online detection and processing compensation of a thermal-state workpiece are realized.
Owner:ZHEJIANG HIGWAY HYDRAULIC TECH CO LTD
Intelligent path planning system and optimization method for large structure robot welding
PendingCN120985664AProgramme-controlled manipulatorWelding/cutting auxillary devicesMachineVisual perception
The invention relates to the technical field of robot welding, in particular to an intelligent path planning system and optimization method for large structure robot welding, by collecting three-dimensional point cloud data of a workpiece and temperature field and stress field data in the welding process, a geometry-heat-force multi-field coupling model is established, and a machine learning algorithm is adopted for parameter correction; based on the model, a deep learning network is adopted to identify welding seam topological features and generate a path constraint parameter set; welding path nodes are optimized by using a hybrid optimization strategy of reinforcement learning and a multi-target genetic algorithm; monitoring the shape of a molten pool through a visual sensing system, and dynamically adjusting welding parameters in combination with a model predictive control algorithm; a distributed model predictive control algorithm is adopted to coordinate the motion trails of the multiple robots; and finally, constructing a welding process knowledge graph to realize continuous optimization of the system. The problems of inaccurate welding deformation prediction and poor path planning adaptability in the prior art are solved, and the welding quality and the production efficiency of the large structural part are remarkably improved.
Owner:HARBIN ELECTRIC MACHINERY FACTORY (ZHENJIANG) CO LTD
Performance-based fire-resistant design method for cable system of large-span suspension bridge
The invention discloses a performance-based fire-resistant design method for a cable system of a large-span suspension bridge. The method comprises the steps of bridge fire-resistant category division, fire intensity division, fire-resistant target determination, adverse fire scene determination, fire response calculation, fire-resistant checking calculation, fire-resistant protection and the like. The bridge fire-resistant category, the fire intensity, the fire-resistant performance and the fire-resistant target are all divided into three levels. The adverse fire scene is determined based on the fire type, fire combustion mode, fire position, wind speed and wind direction influence and combined with the structure stress state; fire response is calculated through thermal-mechanical coupling by adopting a finite element method; the fire-resistant checking calculation can adopt a design method based on overall structure fire-resistant checking calculation or component fire-resistant checking calculation; and when the fire-resistant checking calculation of each component of the cable system does not meet the fire-resistant target, fire-resistant protection design is carried out, and a fire-resistant protection scheme is designed by combining tests and numerical simulation. The fire-resistant design method based on the performance of the suspension bridge cable system is constructed, and reference can be provided for fire-resistant design of the suspension bridge.
Owner:NANJING TECH UNIV
Multi-physical-field intelligent optimization system and method for low-thermal-resistance stacked electrode packaging
PendingCN121525605AComputer aided designSpecial data processing applicationsData acquisitionClosed loop
The invention discloses a multi-physical-field intelligent optimization system and method for low-thermal-resistance stacked electrode packaging, and relates to the technical field of packaging thermal management. According to the system, a thermal, mechanical and electric multi-physics field coupling model of the stacked electrode packaging structure is established in a unified computational domain through a modeling module; the measurement module collects thermal resistance, thermal conductivity and interface stress data in real time through an integrated sensor; the self-correction optimization module executes a self-adaptive residual iterative algorithm based on the deviation between the model simulation result and the actually measured data, corrects model parameters and generates process control variables; and the process regulation and control module dynamically adjusts the sintering temperature, the coating thickness and the pressing pressure according to the control variables and feeds back updated data to form closed-loop optimization. According to the method, collaborative operation of modeling, measurement, optimization and process regulation and control is realized, dynamic self-correction of multi-physical field parameters and process adaptive optimization can be realized in the packaging operation process, the interface thermal resistance is remarkably reduced, and the heat-conducting property and the structural stability are improved.
Owner:YANGZHOU JIANGXIN ELECTRONICS CO LTD
Electromagnetic-thermal-mechanical full-coupling simulation design method and system for SiC controller
The invention provides a SiC controller electromagnetic-thermal-force full-coupling simulation design method and system, and belongs to the technical field of power electronic device simulation design, and the method comprises the steps: constructing a bidirectional real-time coupling model of an electromagnetic field, a thermal field and a mechanical stress field; the irradiation dose is determined based on the expected working environment of the SiC controller, irradiation damage factors are introduced to correct SiC material parameters, and a bidirectional real-time coupling model is input; different temperature conditions and stress conditions are input into the bidirectional real-time coupling model for multi-working-condition simulation, performance parameters of the SiC material are output, and a quantitative relation model of the performance parameters, the temperature and the stress is established to reveal the performance degradation law of the SiC material; and based on the bidirectional real-time coupling model and the performance degradation law of the SiC material, taking the switching loss and the temperature rise as optimization targets, and carrying out collaborative optimization on parameters of the SiC controller. The simulation precision is improved, the performance of the SiC controller is optimized, the reliability is improved, and the service life is prolonged.
Owner:SINO TRUK JINAN POWER CO LTD
Molten pool dynamic simulation model and system for simulating laser drilling based on level-set method
PendingCN120781592ADesign optimisation/simulationSpecial data processing applicationsMathematical modelDynamic monitoring
The invention provides a molten pool dynamic simulation model and system for simulating laser drilling based on a level-set method, and the model comprises a two-dimensional molten pool simulation model which comprises heat transfer-laminar flow (two-phase flow) and level-set physical field coupling; on the basis of the confirmed implementation process parameters and material physical property parameters, a molten pool interface simulation metallographic phase under given process operation is compared with an actual metallographic phase, and a heat transfer mathematical model in the laser drilling process is obtained through simulation confirmation; and the three-dimensional thermal-mechanical coupling model is constructed based on a heat transfer mathematical model and further coupled with a solid mechanical physical field, so that temperature distribution and stress distribution at the welding printing position in the laser drilling process are obtained through simulation. The technical problems that in an existing laser drilling welding technology, parameter debugging depends on experience, dynamic monitoring of a molten pool is difficult, and thermal stress prediction means are lacked can be effectively solved, and powerful theoretical support and data basis are provided for optimizing the welding technology and improving the welding quality.
Owner:JIANGSU RELIANCE ENERGY TECHNOLOGY CO LTD
A cooling tower adaptive air intake regulation system and method coupled with flow guiding energy saving
An adaptive air intake control system and method for cooling towers, coupled with airflow diversion for energy saving, belongs to the field of adaptive control system technology. The system includes an information acquisition unit, an execution unit, and an adaptive control unit. The information acquisition unit collects environmental wind parameters and key operating parameters in real time. The execution unit includes multiple independent fan blade groups with circumferential partitioning and vertical layering for precise execution of commands. The adaptive control unit executes operational decisions, selecting the dominant operating mode from airflow diversion energy saving, anti-freezing energy saving, and anti-drip energy saving modes; it then identifies and outputs wind condition characteristics and thermal anomaly indicators through key parameter status identification, and generates control commands based on the adaptive control strategy and command generation. The system forms a closed loop, capable of adaptively adjusting the identification model and control strategy based on feedback. A corresponding control method is also disclosed, enabling intelligent and precise control of air intake in cooling towers under complex environments, improving cooling efficiency and energy saving while ensuring anti-freezing safety.
Owner:济南蓝辰能源技术有限公司
Thermal power plant deep peak regulation system and method utilizing high-temperature heat storage energy
The invention discloses a thermal power plant deep peak regulation system and method utilizing high-temperature heat storage energy, and belongs to the field of coupling of industrial high-temperature heat storage energy and thermal power plant deep peak regulation. The system comprises a heating unit which is connected with an electric energy conversion and supply unit and / or a heat energy transfer and storage unit so as to convert electric energy or steam heat energy into heat storage energy of heat storage particles; the heat storage unit is used for storing the high-temperature heat storage particles conveyed by the heating unit; the heat release unit is used for receiving the high-temperature heat storage particles conveyed by the heat storage unit; wherein the heat release unit is a fluidized bed boiler in a thermodynamic system of a thermal power plant, so that heat storage energy of the heat storage particles is transmitted to the original thermodynamic system of the thermal power plant, and deep peak regulation of the thermal power plant is realized through overheating thermal power generation with rated parameters generated by the thermodynamic system. By means of the system, the problem that in the deep peak regulation process of an existing thermal power plant, a thermodynamic system of the thermal power plant and an industrial solid-state high-temperature heat energy storage technology are not coupled is solved.
Owner:ORDOS LABORATORY +1
Intelligent construction site environment quality real-time regulation and control method and system
The invention discloses an intelligent construction site environment quality real-time regulation and control method and system, and relates to the technical field of intelligent construction site environment regulation and control. Continuous frame thermodynamic images of a construction area are collected, a heat source area H and a low-temperature area C are identified, an ultrasonic anemograph is combined, environment data of the construction area are obtained, a normalized data set S is constructed, and a normalized data set is obtained; constructing a thermal field stability index Wd according to the normalized data set S, further calculating a thermal field stability index difference value delta Wd, evaluating a thermal field stable state, constructing a thermal energy diffusion path and a path diffusion response factor Lj of the thermal energy diffusion path when the construction area is in an abnormal state, screening a risk path, and performing thermal energy conduction evaluation on the risk path to obtain a thermal energy conduction evaluation result. And the adaptation level of the heat energy diffusion path and the air supply equipment is judged, a heat energy conduction adjusting measure is generated, and the construction site environment is adjusted, so that the accuracy and intelligence of environment regulation and control and the system response efficiency are improved.
Owner:CHANGZHOU DONGHUA CONSTR & INSTALLATION ENG CO
Fire resistance real-time evaluation system and method based on steel structure
The invention relates to the technical field of structural engineering safety monitoring, in particular to a fire resistance real-time evaluation system and method based on a steel structure, and the method comprises the steps: collecting the surface radiation energy of the steel structure through a distributed thermal infrared imager array, and constructing a millimeter-level precision three-dimensional temperature field distribution diagram in combination with an environment temperature compensation algorithm; inputting the temperature field into the phase change correction model, and dynamically calculating a yield strength attenuation coefficient and an elastic modulus reduction coefficient; constructing a thermal-mechanical coupling nonlinear finite element model based on the degradation parameters, iteratively solving the displacement and stress response of the structure under the fire load action by adopting an arc length method, and extracting a buckling critical load spectrum; and according to the ratio of the real-time fire load to the critical load, a fire-resistant safety level signal is generated, and a graded early warning instruction is triggered. According to the invention, thermal-force response whole-process monitoring and intelligent early warning of the steel structure in a fire disaster can be realized, and the system has high spatial resolution, high physical coupling and multi-level response capability.
Owner:NANJING COMM INST OF TECH +1
Numerical simulation method for solid propellant grain cutting treatment
The invention relates to the crossing field of computer simulation and aerospace propulsion technology, and discloses a numerical simulation method for solid propellant grain cutting treatment, which comprises the following steps: establishing a three-dimensional model of a grain and a cutting tool, and defining a heat-force-damage coupling constitutive relation and boundary conditions; performing multi-physical field monitoring based on the weighted combination of the equivalent plastic strain, the temperature and the damage gradient at each time step; dynamically executing self-adaptive encryption and coarsening of the grid; in combination with dynamic load balancing in parallel computing, the resource utilization rate is increased; and material separation is simulated through a damage fracture criterion, and finally high-precision cutting force, a temperature field, a stress-strain field and a cutting morphology are output. According to the method, the simulation precision and efficiency are improved, and reliable support is provided for process optimization and safety evaluation.
Owner:SHENZHEN HUALONG ZHICHUANG TECHNOLOGY CO LTD
Motorized spindle thermal characteristic analysis modeling method based on multi-patch isogeometric analysis
The invention discloses a motorized spindle thermal characteristic analysis modeling method based on multi-patch isogeometric analysis, which comprises the following steps: S10, carrying out geometric modeling of a high-speed motorized spindle: constructing a multi-patch solid model comprising a motorized spindle stator, a rotor, a bearing and a cooling pipeline of the high-speed motorized spindle by adopting a three-dimensional NURBS patch splicing technology, geometric continuity and parameterization consistency are ensured; s20, performing heat conduction analysis: constructing a transient heat conduction control equation based on a Fourier heat conduction differential equation in combination with high-order smoothness characteristics of the IGA, and solving a temperature evolution process in a time domain through a backward difference method; and S30, performing thermal error modeling: introducing an elastic mechanical constitutive relation and a fixed support boundary, and establishing a thermal-force coupling solving framework.
Owner:NINGBO UNIV
Fatigue life analysis method of wind power main bearing based on thermal-mechanical coupling
The invention belongs to the field of failure analysis of bearings, and discloses a fatigue life analysis method of a wind power main bearing based on thermal-mechanical coupling. In order to consider the influence of pre-tightening on the service life of the bearing, the method takes the pre-tightening force of the bearing as a starting point, and gradually establishes a relational expression between pre-tightening and a series of static characteristics such as contact deformation, contact load, fatigue life and the like by utilizing an analytical method; meanwhile, the friction torque is introduced, the finite element analysis method is used for solving the influence of thermal deformation on the static characteristics of the bearing, the influence is substituted into the static characteristic relational expression, and finally the service life analysis method of the bearing based on thermal-mechanical coupling is achieved. Compared with the conventional service life analysis method, the fatigue service life analysis method disclosed by the invention has the advantages that the thermal deformation of the bearing caused by friction is additionally considered, so that the analysis is more comprehensive, and the precision of the service life analysis of the bearing is further improved.
Owner:DALIAN UNIV OF TECH
Spray cooling intelligent management and control system optimization algorithm for 330MW cogeneration unit
The invention discloses a spray cooling intelligent management and control system optimization algorithm for a 330MW cogeneration unit, and relates to the technical field of thermal equipment cooling, and the algorithm comprises the steps: obtaining unit operation parameters, environment meteorological data, a spray system state and resource price information, and forming multi-source synchronous input data; on the basis of multi-source synchronous input data, feasibility judgment is carried out according to preset temperature, load and water source conditions, and a spraying enable signal is output; based on historical unit operation data, optimizing a time sequence prediction model constructed by hyper-parameters through a genetic algorithm, in response to the spray enable signal, performing rolling prediction on the saturation temperature of the condenser by using the time sequence prediction model in combination with a candidate spray strategy to obtain a temperature change sequence; according to the temperature change sequence, power generation benefit increment is calculated in combination with thermal characteristics of the steam turbine, spraying energy consumption and water consumption cost are deducted, and an optimization function is constructed; on the basis of the optimization function, supercooling prevention, condensation prevention, amplitude limiting execution and water source total amount limitation are embedded as hard constraint conditions.
Owner:HUADIAN XINJIANG POWER CO LTD +1
Method for evaluating water hammer-thermal shock coupling fatigue life of LNG (Liquefied Natural Gas) flexible pipeline
PendingCN121936156ADesign optimisation/simulationSpecial data processing applicationsFatigue damagePipe water
The invention provides an LNG flexible pipeline water hammer-thermal shock coupling fatigue life evaluation method. The method comprises the following steps that an LNG flexible pipeline three-dimensional thermal-mechanical coupling model is established; transient fluid pressure fluctuation and temperature shock in the valve switching process are simulated, and a time-varying temperature field, a stress field and a crack tip stress intensity factor of the pipeline under the water hammer-thermal shock coupling effect are solved; a low-temperature test system is constructed, simulation results and experimental data are compared, and boundary condition parameters in the LNG flexible pipeline three-dimensional thermal-mechanical coupling model are corrected; cyclic load characteristics in the corrected stress response spectrum are extracted based on a rain flow counting method, and in combination with a corrected EPRG empirical model or an SES model, the accumulated fatigue damage amount of the crack-containing pipeline under the water hammer-thermal shock coupling cyclic load is calculated; and predicting the residual fatigue life of the pipeline. According to the method, the prediction precision of the fatigue life of the LNG flexible pipeline under the complex coupling action of the water hammer and the thermal shock is improved.
Owner:ZHEJIANG UNIV +1
Battery pack extrusion force abnormity identification method and system based on historical pressure
The invention discloses a historical pressure-based battery pack extrusion force abnormity identification method and system, and relates to the field of pressure abnormity identification, and the method comprises the steps: firstly building a pressure reference prediction model capable of reflecting the influence of main factors such as temperature and SOC through employing the physical mechanisms such as thermal-force and electrical-force coupling; then, a data driving model is introduced to carry out refined compensation on prediction residual errors of the physical model, complex dynamic characteristics such as nonlinearity and time lag which are not completely described by the physical model are further captured, and a highly accurate hybrid model prediction pressure value is generated; finally, dynamic characteristic analysis is carried out on the final residual error between the accurate prediction value and the actual measurement value, so that real abnormity caused by deterioration of the health state of the battery can be sensitively recognized from complex background noise, and the problems of false alarm and missing alarm caused by the fact that an accurate pressure reference cannot be established in a traditional method are solved.
Owner:MINGGAN TECHNOLOGY (SHAOXING) CO LTD
Thermal coupling loading test device for turbine interstage casing of aero-engine
PendingCN122042253AGas-turbine engine testingMachine gearing/transmission testingCold airControl system
The invention provides an aero-engine turbine interstage casing thermal-mechanical coupling loading test device, which comprises a mechanical loading test tool clamp, a temperature field control system and a test assembly, and is characterized in that the test assembly is used for simulating a turbine interstage casing assembly and is installed on the mechanical loading test tool clamp; the mechanical loading test tool clamp is used for composite loading of radial force and axial force of the test assembly. The temperature field control system comprises a cooling system and a heating system, and the cooling system and the heating system enable the test assembly to reach an expected target temperature field by controlling the temperature to adjust the current of the heater and the flow of cold air. The device has the advantages of being simple in structure, flexible to install, high in control precision, easy to operate and the like, and can be used for controlling the deformation discordance of the turbine interstage casing supporting plate and applying the mechanical load of the casing, so that an interstage casing outer ring stress-strain assessment point reaches the working state of an engine, and the working efficiency of the engine is improved. And checking whether the strength design of the inter-stage casing meets the expectation or not.
Owner:AECC COMML AIRCRAFT ENGINE CO LTD
Functional partition type composite blade design method based on single-crystal high-temperature alloy and ceramic-based composite material
The invention discloses a single-crystal high-temperature alloy and ceramic matrix composite material-based functional partition type composite blade design method, which comprises the following steps of defining a temperature bearing area and a force bearing area of a blade through heat and force simulation; the brazing residual stress is predicted, and the optimal assembly gap between the two partition interfaces of the temperature bearing area and the force bearing area of the composite blade is optimized and determined; predicting peak stress, and optimizing and determining the optimal position and size of a mechanical locking structure between two partition interfaces of a temperature bearing area and a force bearing area of the composite blade; and through heat-force-flow coupling simulation, the maximum equivalent stress of the composite blade and the bonding strength between partition interfaces are evaluated, and then the design of the composite blade is completed. According to the method, through heat-force-flow coupling simulation and iterative optimization, precise definition of function partitions and cooperative compatibility of mechanical locking and the process are achieved, and the low-stress and high-strength performance of the composite blade in the high-temperature and high-pressure environment is ensured.
Owner:AVIC BEIJING INST OF AERONAUTICAL MATERIALS
Process for cooling and for the use of environmental heat
PCT designated stageWO2025224471A1Machines/enginesMechanical power devicesThermal dilatationWorking fluid
The present invention relates to a process for cooling and for the use of environmental heat, where the following steps are carried out, implemented in a thermodynamic machine: a) the working fluid being in steam state is adiabatically expanded (1-2), b) the working fluid being in wet-steam state is separated according to state into liquid (0) and steam (3) components, c) the temperature of the working fluid being in steam state (3) is increased by adiabatic compression (3-4), d) the working fluids of liquid (0) and steam (4) are compressed (4-1) and mixed at the same time, keeping the temperature of the steam (4) at a constant level by means of the compression, and generating steam (1) of stable state through the evaporation of the liquid (0), e) the process is repeated periodically.
Owner:MARCZ HENRIK
Electric-thermal-magnetic-force coupling field finite element simulation life prediction method for board-level electronic packaging device
PendingCN121659638ADesign optimisation/simulationSpecial data processing applicationsElectromagnetic couplingThermal force
The invention provides an electro-thermal-magnetic-force coupling field finite element simulation life prediction method for a board-level electronic packaging device, relates to the field of electronic packaging reliability analysis and finite element simulation, and aims to solve the problems that life prediction depends on single / partial field coupling, neglects the influence of electromagnetic force and magnetic field, lacks a multi-field transmission mechanism, and cannot predict the life of the board-level electronic packaging device. Therefore, the problems of large prediction deviation and incapability of realizing full-field coupling are solved. According to the method, a real welding spot model is firstly built and repaired, a board-level packaging three-dimensional structure subdivision grid is constructed, electromagnetic force and additional heat are obtained through electro-magnetic coupling, heat-force coupling loading is input to calculate heat stress, at least two fatigue models are substituted, and the service life of a key welding spot is calculated. Electro-thermal-magnetic-force full-coupling simulation is achieved, life prediction precision is improved through multi-model fusion, multi-package and multi-load adaptation is achieved, a reliable basis is provided for electronic package design, the test period is shortened, the experiment cost is reduced, and development of package reliability research towards multi-field life prediction is promoted.
Owner:HARBIN INST OF TECH +1
Thermodynamic water heater and the water heating process using it
Thermodynamic water heater and water heating method implementing it The invention relates to a thermodynamic water heater (1) comprising a heating device (2) and a tank (3) with a container (3') for the water to be heated / heated, the tank (3) also comprising a condenser circuit (4) supplied by the heating device (2) forming a closed loop of heat transfer fluid circulation, and with an upper inlet end (4') and a lower outlet end (4'').A water heater characterized in that said condenser circuit (4) comprises a main hot heat transfer fluid supply inlet (5) and another secondary hot heat transfer fluid supply inlet (51), said secondary supply inlet (51) corresponding to an intermediate connection point (PR) of said condenser circuit (4), located between its upper inlet end (4') and its lower outlet end (4'') and defining two portions of the condenser circuit (4) corresponding respectively to two superimposed volumetric zones (Z1 and Z2) within the internal volume of the container (3'), and in that each of the hot heat transfer fluid supply lines (6, 61) connecting the heating device (2) to the supply inlets (5, 51) comprises a control valve (7, 71). Figure to be published with the abbreviation: Fig. 1.
Owner:VIESSMANN CLIMATE SOLUTIONS SE
Thermal deaerator
ActiveCN224172508ULiquid degasificationWater/sewage treatment by degassingThermodynamicsElectric machine
The utility model discloses a thermal deaerator which comprises a base, the top of the base is fixedly connected with a supporting block, the top of the supporting block is fixedly connected with a first tank body, the bottom of the first tank body is fixedly connected with a water outlet pipe, and the interior of the water outlet pipe is fixedly connected with a first filter screen. A second filter screen is fixedly connected to the interior of the water outlet pipe, a water passing plate is fixedly connected to the interior of the water outlet pipe, a rotating shaft is rotatably connected to the top of the water passing plate, and a plurality of blades are fixedly connected to the exterior of the rotating shaft. By means of the structure, impurities in water are smashed, then under driving of a second motor, a second driving rod is matched to drive a limiting round block in a fixing block to move from a groove in the fixing block, water is discharged, and therefore it is guaranteed that deoxygenated water can be smoothly conveyed to a follow-up system; normal operation of the thermal deaerator and the whole thermal system is maintained, and system faults and shutdown maintenance caused by pipeline blockage are avoided.
Owner:LIANYUNGANG BANGJIU PETROCHEMICAL EQUIPMENT MANUFACTURING CO LTD
Axial auxiliary thin-wall pipe thermal expansion graphite forming method
The invention discloses an axial auxiliary thin-wall pipe thermal expansion graphite forming method, and belongs to the technical field of metal pipe precision forming. The thermal expansion graphite with different properties is selected in the thin-wall pipe fitting and at the two ends of the thin-wall pipe fitting, the internal pressure for forming the thin-wall pipe fitting and the load required for axial end part material supplementation are provided by utilizing different thermal expansion effects and generated thermal-mechanical properties of the thermal expansion graphite under a certain temperature condition, and therefore near-equal-wall-thickness and high-quality forming of parts of the kind is achieved. The method provided by the invention has the advantages of simple mold structure, convenience in process operation and the like, and has relatively high engineering application and popularization values in the aspect of thin-wall pipe fitting forming in the fields of aerospace, machinery, automobiles and the like.
Owner:SHENYANG AEROSPACE UNIVERSITY