59 results about "Thermal force" patented technology

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.

The present application belongs to the technical field of thermal load deformation and force load deformation measurement, and relates to a thermal and force deformation field decoupling method and system based on two-dimensional visual measurement. According to the temperature field at discrete temperatures, the thermal deformation field at discrete temperatures and the corresponding temperature, and by using a binary function model, the influence coefficient of fitting temperature on thermal strain is obtained, the jumps between discrete data are eliminated, and the continuity and prediction ability of thermal strain are improved. According to the influence coefficient of fitting temperature on thermal strain and the binary function model, a fitted binary function model is obtained, which is more in line with the actual material properties. According to the temperature field under the thermal and force coupling condition, the deformation field under the thermal and force coupling condition and the fitted binary function model, an equivalent thermal deformation field is obtained, the thermal and force coupling deformation is decoupled, the dynamic correlation of thermal strain and deformation field is realized, and the decoupling precision is improved.

The application integrates a passive wireless temperature control sensing unit and a pulse eddy current nondestructive testing module, synchronously collects temperature, frequency offset and lattice strain data of a low-temperature bearing ring under rotating working conditions, constructs a thermal-force coupling correlation model through a low-temperature tribology-thermal conduction coupling analysis module, and outputs a friction heat generation rate prediction value. Relying on a federal learning edge inference module, distributed model training is completed, combined with homomorphic encryption to guarantee data security, and the data island restriction is broken through. Based on an optimization strategy, the edge controller dynamically adjusts the sensing sampling interval through reinforcement learning, solves a multi-objective optimization problem by using a non-dominated sorting genetic algorithm, and drives the hierarchical start and stop of the self-cooling system. The application eliminates the physical interference of wired sensing, realizes adaptive temperature control and energy-saving cooling of the bearing ring under low-temperature working conditions, and improves the temperature control precision and system generalization ability.

The application discloses a high-voltage cable ultrasonic deicing device, which comprises a box body, a support for each mechanism, a lifting hook connected to the box body, openings at both ends and the bottom of the box body, and a box door connected to the bottom of the box body; a walking mechanism connected in the box body and used for the overall movement of the device on the cable, the walking mechanism comprising walking wheels, and a driving assembly drivingly connected to the walking wheels; a clamping mechanism connected in the box body and used for limiting the whole device on the cable; a deicing mechanism connected to the opening at the bottom of the box body, the deicing mechanism comprising a rotating piece and an ultrasonic knife connected to the rotating piece. Compared with the prior art, the application utilizes the strong shearing force generated by ultrasonic high-frequency vibration on the ice surface of the cable, so that the ice layer can be rapidly broken and dropped, and the application has the advantages of high efficiency, energy saving, safety and the like compared with traditional methods such as thermal deicing and mechanical knocking deicing.

The present application relates to a kind of X80 pipeline electric arc additive manufacturing method and system based on thermal-mechanical coupling regulation mechanism, the method includes: first, the continuous cooling transformation curve of X80 steel is determined to determine phase transition temperature interval;Thermal-mechanical coupling finite element model containing mobile heat source and mobile force source is constructed and calibrated;On this basis, process prediction model is established, and the mapping relationship between process parameter and temperature field, stress field is obtained;Optimization algorithm is used in simulation space to carry out reverse optimization, and the optimal thermal-mechanical coupling process parameter combination is obtained;Finally, in actual repair process, deposit layer temperature is monitored in real time by infrared temperature measurement, when temperature falls into phase transition temperature interval and approaches optimal impact intervention temperature, drive with welding ultrasonic impact device to execute mechanical impact.The present application can significantly reduce residual tensile stress and improve the degree of grain refinement.

The application relates to the technical field of structure measurement, and discloses a structure fatigue life prediction method and system based on multi-source data fusion. First, initial state point cloud data is collected; in a dynamic load test, a quasi-static moment when the vibration speed of a structure is zero is identified, three-dimensional point cloud data, temperature field data are synchronously triggered and collected, and a strain value is extracted; a thermal deformation vector field is constructed according to the temperature field data, a pure plastic deformation field is obtained by deducting the thermal deformation vector field from the point cloud data, and a multi-dimensional damage feature vector is constructed by fusing the strain value; the multi-dimensional damage feature vector is input into a pre-trained physical information neural network model, and a residual fatigue life prediction value and a weak area risk thermodynamic diagram are output. The application realizes high-precision measurement under dynamic load without shutdown, and significantly improves the precision and reliability of fatigue life prediction through thermal-force-shape decoupling and physical information neural network fusion.

This invention discloses a method for controlling the speed lag during the water entry transient of a vehicle's propulsion system, comprising the following steps: Step 1, constructing a cross-medium aerial propulsion system and performing aerial and underwater thermodynamic design to obtain the cross-medium system configuration; Step 2, establishing a dynamic mathematical model of the cross-medium propulsion system based on the cross-medium system configuration; Step 3, designing a control algorithm based on the dynamic mathematical model of the cross-medium propulsion system to adjust the fuel pump displacement during the water entry process, achieving closed-loop control of the turbine speed, and obtaining an optimized propulsion system; Step 4, simulating the optimized propulsion system to obtain the control response characteristics of the cross-medium propulsion system during the water entry process. The speed lag control method for the water entry transient of a vehicle's propulsion system disclosed in this invention solves the problems of existing PID control being prone to instability under engineering delays and failing to provide a safety margin for the determination of response time for sensors and actuators.

The present application 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 acquisition and processing module and a thermal inversion calculation module.The pneumatic servo control module drives the overturning cylinder to apply a composite pressure waveform comprising a static reference and a periodic jitter component to the hydraulic sleeve; the signal acquisition and processing module performs frequency domain analysis on the displacement signal detected by the displacement sensor to separate the average displacement and displacement amplitude; the thermal inversion calculation module calculates the real-time dynamic stiffness according to the displacement amplitude, inversely calculates the temperature rise value using a material stiffness thermal softening model, and separates the thermal expansion and elastic deformation error through multi-dimensional error decoupling operation to calculate the standard temperature and real height data under no external force.The present application effectively solves the oil film and thermal deformation interference by using active excitation and frequency domain analysis technology, and realizes high-precision online detection and machining compensation of the thermal workpiece.

The application discloses a kind of ice water two-phase flow anti-icing performance testing device and testing method, it is related to solid-liquid two-phase flow experimental equipment technical field.The application provides a kind of testing device, it includes ice water mixture fluid supply system and with multiple interface entrance component test section.The ice water mixture fluid supply system can prepare and long time maintain ice water mixture flow with constant ice content, ice crystal uniform suspension by built-in anti-agglomeration stirring component and external quantitative solid particle supply device.The multiple interface entrance component integrates at least two different principles or ways of heat source interface, such as first heat source interface for introducing high-temperature fluid and second heat source interface for electric heating.The application realizes stable and repeatable ice blockage experiment working condition by the above scheme, and can compare and verify the efficiency of various heat force dredging techniques on the same platform, with the beneficial effects of high working condition stability, high functional integration, high data value.

This invention discloses a method for solving the thermo-coupling vibration characteristics of a precision gearbox based on multi-field coupling, which includes the following steps: (1) Considering the time-varying load distribution characteristics between the gear teeth of the precision gearbox, constructing a vibration differential model of the precision gearbox; (2) Discretizing the precision gearbox into a series of thermal nodes connected by thermal impedance, establishing a heat transfer model of the precision gearbox; (3) Assuming that the meshing between the gear teeth is a line contact unit, establishing a lubrication model of the precision gearbox; (4) Using a stepwise correlation method, performing real-time iterative coupling of the vibration model, lubrication model and heat transfer model of the precision gearbox, and solving for the vibration characteristics, oil film distribution and heat generation of the precision gearbox under multi-physics coupling conditions; The beneficial effect of this invention is that it can systematically reveal the vibration characteristics of the precision gearbox, the multi-physics coupling interaction mechanism between lubrication and heat transfer, and provide theoretical support for the design of precision gearboxes.

This invention discloses a structural thermo-mechanical coupling method and apparatus considering isogeometric analysis, belonging to the field of thermodynamics. The method includes: S1. Establishing an isogeometric NURBS model: providing the basis for expressing geometric and physical fields for thermo-mechanical coupling analysis, achieving seamless integration of CAD and CAE; S2. Calculating the transient temperature field based on the central difference method: obtaining the temperature distribution of the structure at different times, providing temperature input for subsequent thermo-mechanical coupling; S3. Transforming the temperature field into equivalent temperature loads: converting the thermal effects caused by temperature changes into equivalent loads identifiable by structural mechanics analysis; S4. Solving the stiffness equation of the structure under the combined action of external forces and temperature: obtaining the displacement matrix of the structural control points; S5. Solving the structural coupling field based on the displacement matrix: obtaining all key physical quantities in the thermo-mechanical coupling field, completing the coupling analysis. This invention can verify the feasibility of applying isogeometric analysis in coupled fields.

This disclosure provides a thermal, mechanical, and fluid measurement system and testing method for microwave microsystems under complex service environments. The system includes: an environmental simulation subsystem, comprising an internal thermal excitation module and an external environmental simulation module. The internal thermal excitation module generates and outputs target thermal power to simulate the operating heat generation of a power-consuming chip in the microwave microsystem under test. The external environmental simulation module controls the external boundary conditions applied to the microwave microsystem under test, including at least two of thermal conduction boundary conditions, thermal convection boundary conditions, thermal radiation boundary conditions, and random vibrational dynamic loads. A comprehensive measurement subsystem is used to obtain temperature field information, stress-strain information, and liquid cooling fluid parameters of the microwave microsystem under test in the state of coordinated operation of the internal thermal excitation module and the external environmental simulation module. The environmental simulation subsystem and the comprehensive measurement subsystem are integrated in a test platform, and the microwave microsystem under test is placed in the test platform for testing.

The application discloses a full-parameter feedback type intelligent heat room layered cooperative control system and method, relates to the technical field of centralized heating pipe network automation control, and comprises a multi-dimensional heterogeneous parameter sensing module, a layered cooperative calculation module, a dynamic decoupling execution module and a soft measurement self-recovery monitoring module. The sensing module collects hydraulic transient and thermal lag data in all directions; the cooperative calculation module constructs a dimensionless 'thermal-hydraulic coupling urgency index' based on heterogeneous data, realizes decoupling calculation of time scale and physical dimension and generates a cooperative regulation instruction; and the execution module executes anti-oscillation clamping regulation of the regulation valve according to the instruction and in combination with a dynamic penalty function. The application breaks the dimensional interference and regulation deadlock in traditional full-parameter control, completely eliminates feedback storm under the layered architecture, and innovatively converts building thermal inertia into a virtual energy storage pool of the pipe network, so that high decoupling of thermal and hydraulic forces and peak load cutting and valley filling without additional hardware are realized.

This invention relates to the field of sliding bearing simulation and optimization technology, and more specifically to a high-precision simulation and optimization design method for hydrostatic thrust sliding bearings. It establishes an efficient decoupling model of the fluid-solid-thermal three-physics field of the hydrostatic thrust sliding bearing, decomposing the overall thermodynamic field into two subfields, which are coupled with the fluid force field and the solid force field, respectively. Then, it constructs a gap oil film flow / thermal field model and a friction pair deformation solid / thermal field model, achieving equivalent coupling through data transfer. The oil film control equations are iteratively solved to obtain oil film pressure, temperature, and flow velocity; the friction pair equations, including elastic constitutive and thermal strain equations, are solved to obtain their elastic and thermal deformations, with bidirectional data transfer achieving coupled iteration. Based on the above method, simulations are performed, establishing sub-models of oil film flow and friction pair deformation, using local interpolation and dynamic meshing to process the interface; the oil cavity is optimized based on the simulation results, parametric analysis is used to establish the mapping between structural parameters and lubrication performance, the objective function and constraints are defined, and the optimal oil cavity structure is obtained through algorithms.

The application relates to the technical field of fault prediction, in particular to an aero-engine key component repair effect and residual life prediction system based on digital twinning, which comprises a repair component digital twinning modeling module, which is used for collecting geometric point cloud data of repaired blades and coatings of an aero-engine, generating a repair area multi-physical field boundary condition, driving finite element grids to perform thermal force coupling iterative calculation according to the repair area multi-physical field boundary condition, and constructing an engine repair component digital twinning body. In the application, the total amount of local cumulative entropy production is compared with a fracture threshold value, and a compatibility evolution trend is combined to double-lock a fault critical point from two dimensions of material body failure and structural interface debonding, so that a prediction result containing a repair effect grade and a residual life cycle is output without a large number of historical sample training, and the reliability of service evaluation of aero-engine remanufactured components is improved.

This invention provides an experimental apparatus and method for simulating the spatiotemporal variation of thermodynamic parameters of high-pressure air in an artificial chamber. It can measure the spatiotemporal variation of fluid thermodynamic parameters during the injection, storage, and release of high-pressure air in an artificial chamber, revealing the influence of characteristics such as inflation / discharge rate, minimum operating pressure, and air inlet temperature on temperature and pressure changes in the artificial chamber. This invention fills a gap in the existing technology and is suitable for large-scale industrial use and promotion.

This invention belongs to the field of aero-engine intake and exhaust, and provides an integrated thermal structure for force transmission and flow in dual high-temperature flow channels, along with its design method. The integrated thermal structure includes an internal cavity formed by upper and lower flow channel surfaces, left and right sidewalls, and endwalls. A lattice structure is filled within the cavity as the main load-bearing framework. Air film vents are provided on both sides of the upper and lower flow channel surfaces for cooling. A hinged mounting base is used for load transfer. The flow channel surfaces, sidewalls, endwalls, and mounting base are made of high-temperature resistant metal materials, while the lattice structure is made of lightweight, high-strength materials. The entire structure is integrally formed through additive manufacturing. The design method is based on thermo-mechanical coupling simulation data under target operating conditions, driving the non-uniform distribution of the lattice and defining material partitions. This invention is applicable to dual-sided high-temperature flow channel scenarios such as variable cycle engines, eliminating the need for exposed reinforcing ribs and avoiding increased flow resistance; multi-point support of the lattice eliminates stress concentration and boundary warping; and significantly reduces weight while maintaining strength, improving cooling efficiency and structural reliability.

A propulsion system for an aircraft is provided that includes a thermal engine, an electrical power motive system, a propulsion unit, and a thermal management system. The electrical power motive system has an electric motor. The thermal management system includes a first heat exchanger, and is configured to cycle a flow of lubricant into and out of the thermal engine and into and out of the first heat exchanger in a first loop, and is configured to cycle a flow of coolant into and out of thermal engagement with the electrical power motive system and into and out of the first heat exchanger in a second loop. The first heat exchanger is configured to permit heat transfer between the flow of lubricant and the flow of coolant to occur within the first heat exchanger.

The present application relates to the technical field of wear measurement, in particular to a rubber sealing piece wear resistance test method and system, in the present application, the tangential friction torque and normal compression displacement sequence are acquired synchronously, and the corresponding time window data segment is extracted, the weighted cumulative torque and the friction interface temperature gradient are standardized and multiplied to construct the thermal coupling cumulative damage parameter, the torque maximum value and the displacement minimum value are extracted to construct the envelope boundary sequence and perform the discrete cross-correlation operation to establish the torque displacement correlation characteristics, the correlation characteristics of the mechanical dimension and the cumulative damage of the thermal physical dimension are fused to generate the multi-physical quantity coupling correlation characteristic value, the historical evolution difference value of the characteristic value is combined to track the microstructure change strength, the microstructure peeling starting point of the surface material is accurately captured, the limitation of single data measurement is overcome, the qualitative and quantitative evaluation of multi-dimensional physical parameter fusion is realized, and the accuracy of the wear resistance state test conclusion is ensured.

The application discloses a narrow-gap welding heat input real-time regulation method and system based on multispectral temperature measurement, relates to the technical field of welding, and comprises the following steps: collecting multi-source sensing data of a welding area; reconstructing a partition temperature field and solving multi-dimensional physical characteristics; obtaining quality mapping probability values based on a welding quality mapping model; taking the minimum quality mapping probability value as a target, combining the welding quality mapping model and a prior heat force mechanism model, optimizing and solving welding parameter adjustment amounts, and adjusting real-time welding parameters according to the optimization and solving results. The technical problems that the existing narrow-gap welding heat input regulation method cannot comprehensively reflect the complex heat force behavior of the welding area, leads to poor sidewall fusion, performance degradation of the heat affected zone, and insufficient adaptability to dynamic changes, and is difficult to realize precise parameter adjustment are solved.

The application belongs to the field of additive manufacturing dot matrix structure, and particularly relates to a method for improving the durability of an additive manufacturing dot matrix structure through interlayer thermal force action.S1: a stress distribution model of a dot matrix structure bearing is constructed by using simulation software, and a weak area of stress concentration at a node of the dot matrix structure is obtained; the area of stress concentration at the node of the dot matrix structure is identified according to an initial stress field of the dot matrix structure;S2: model preprocessing and parameter planning;S3: superfast laser in-situ thermal force action integrated additive forming.The application improves the durability and mechanical properties of the laser additive manufacturing dot matrix structure, and can solve the problem that the dot matrix structure node of the current additive manufacturing is prone to defects and thus failure.

The present invention relates to a heat non-combustion type aerosol generating product, which comprises a filtration segment, an air flow passage segment, an aerosol generating material segment and a coating layer. The filtration segment, the air flow passage segment and the aerosol generating material segment are sequentially connected, and the coating layer is installed at least outside the air flow passage segment. At least one central duct is provided at the center of the air flow passage segment, and at least one secondary flow duct is installed between the air flow passage segment and the coating layer. The secondary flow duct is in air flow communication with the central duct. A first through hole is provided on the coating layer, and a second through hole is provided in the air flow passage segment. External gas flows through the first through hole into the second through hole and the secondary flow duct respectively and then enters the central duct. The present invention has a simple structure, extracts the aerosol generated in the aerosol generating material segment by using air, is installed as a double duct including a central duct and a secondary flow duct, and combines central intake and secondary flow intake, thereby stabilizing the aerosol extraction effect, increasing the extraction efficiency, increasing the concentration of the fragrance after extraction, and keeping the aerosol temperature relatively low.

This invention discloses a method and electronic device for estimating the thermal loss angle of an engine. The method includes the following steps: Step 1: Obtaining cylinder pressure curves; Step 2: Obtaining the crankshaft rotation angle coordinates and thermal loss angle of the maximum pressure point for each cylinder pressure curve; Step 3: Calculating the zero heat transfer phase difference vector for each cylinder pressure curve; Step 4: Constructing the rotation angle difference vector for each cylinder pressure curve; Step 5: Establishing the thermal loss angle θ. i and the angle difference vector Ω i Step 6: Calculate the estimated thermal loss angle based on the functional relationship f between the thermal loss angle and the rotation angle difference vector. This invention provides a convenient method for top dead center correction during engine production lines, inspection, and maintenance.

This invention discloses a bearing thermo-mechanical coupling analysis method based on finite element thermal networks, comprising the following steps: calculating the initial radial deformation of the bearing under assembly conditions and centrifugal force; considering fluid viscous friction, improving the bearing pseudo-dynamic analysis, and calculating the precise distributed heat generation of the bearing; using the finite element thermal network method, precisely applying heat sources to calculate the refined temperature field of the bearing, its shaft, and bearing housing; based on the discrete temperature field, calculating the comprehensive radial deformation of the bearing under assembly conditions, centrifugal force, and temperature rise, and updating the geometric relationship; updating the heat generation and temperature field through pseudo-dynamic analysis, and iterating through pseudo-dynamic distributed heat generation-temperature field-comprehensive deformation coupling until the lubricating oil outlet temperature converges; outputting the bearing kinematic and dynamic parameters and the bearing temperature field. This invention achieves precise positioning of the bearing heat source and refined temperature distribution of the bearing, its shaft, and bearing housing, providing theoretical guidance for precise thermal analysis in the design and application of high-speed ball bearings.

The application provides a kind of heat-assisted pair wheel spinning temperature control method based on deep reinforcement learning, belongs to the technical field of temperature control, the present application reconstructs the full-field temperature distribution of blank by fusing infrared array sparse measuring point and heat conduction equation residual through physical information neural network;With the realization of thermal response lag compensation by combining the principle of Smith predictor with the condition variation cycle strategy model of thermal-mechanical dual modal fusion;With the joint training of multi-flame gun strategy network in the framework of centralized training and decentralized execution, the coupled thermal field of multiple guns is optimized collaboratively;With Lyapunov guide safety exploration algorithm to perform gradient projection on each power regulation action, ensure that the system state is continuously in the thermodynamic safety domain;With the isomorphism migration strategy alignment algorithm to match similar working conditions from the historical working condition library and generate target working condition strategy initialization parameters;Solved the technical problem that the coupled thermal field of multiple flame guns is difficult to achieve precise closed-loop temperature control in the process of heat-assisted pair wheel spinning under dynamic spinning conditions.

Integrated exhaust manifold (10) with monolithic heat exchanger channels (40) for thermal sector coupling, characterized in that one or more fluid-flowing heat exchanger channels (40) for receiving a heat transfer fluid are integrally incorporated into the manifold wall (30) of the exhaust manifold, so that the manifold wall (30) and the heat exchanger channels (40) form a monolithic component.

This invention discloses a method for analyzing the geometric error of gearbox housings based on thermo-structural coupling deformation, belonging to the technical field of mechanical transmission systems. Addressing the problem of decreased geometric accuracy of automotive gearbox housings under complex operating conditions due to thermo-mechanical coupling, this invention establishes a thermo-mechanical coupling model of the bearing bores, reveals the nonlinear deformation law under the combined action of temperature field and mechanical load, constructs a geometric accuracy evaluation system with parallelism and center distance errors as the core, and combines finite element simulation to quantitatively analyze the housing deformation. This invention provides a feasible analytical method for structural optimization and precision control of gearbox housings, effectively improving gear meshing accuracy and transmission system reliability.