305 results about "Heat effect" patented technology

The invention belongs to the technical field of electrical equipment safety monitoring, and provides an intelligent wire and cable distributed optical fiber temperature measurement early warning method and system, and the method comprises the steps: laying a distributed optical fiber temperature sensor network along a cable, and synchronously demodulating the temperature and strain information based on a distributed optical fiber sensing principle; the temperature, the strain information and the load current are uploaded to a cloud platform through a wireless communication module; operating a time-space fusion diagnosis model driven by a cable physical mechanism on a cloud platform to distinguish and position an abnormal overheating section caused by a current Joule heating effect, insulation loss or contact resistance dramatic increase; and after the abnormity is confirmed, the cloud platform generates a control instruction for the abnormal overheating section to cut off power supply, and an intelligent self-healing process can be started. According to the invention, physical root identification, accurate positioning and safe self-healing of the cable overheating fault are realized, and the safety of cable operation is greatly improved.

The invention provides a multi-energy-field auxiliary laser drilling method and device for a silicon carbide micropore with the large depth-diameter ratio, and relates to the technical field of hard and brittle material precision machining.The multi-energy-field auxiliary laser drilling method for the silicon carbide micropore with the large depth-diameter ratio comprises the following steps that a silicon carbide workpiece is ablated layer by layer through an ultrafast laser beam to form the micropore; and in the layer-by-layer ablation process, the workpiece or the ultrafast laser beam generates relative high-frequency micro-amplitude ultrasonic vibration in the axial direction of the micropore, and the low-temperature high-speed air flow is coaxially guided to an ablation point of the ultrafast laser beam so as to remove ablation products and cool the ablation point and the adjacent area of the ablation point. Through organic combination and synergistic effect of ultrafast laser ablation, ultrasonic vibration in the axial direction of a drill hole and coaxial low-temperature high-speed airflow, the problems that in the prior art, due to unsmooth chip removal of ablation products and the remarkable heat effect, the machining depth is limited, the hole wall quality is poor, and the machining efficiency is low are solved.

The invention discloses a parameter prediction method and device, electronic equipment and a storage medium. According to the method and the device, the essential rule of a salt cavern gas storage system is described on the basis of a physical driving model; meanwhile, systematic errors, caused by parameter simplification, ignoring of shaft dynamic heat exchange and other effects, of a pure mechanism model are accurately learned and compensated by means of a data driving model, and advantage complementation is achieved through fusion of the two; the technical problem that systematic deviation is generated between model output and actual operation data due to the fact that rock and soil mechanical parameters are simplified, a fixed friction coefficient is adopted or a shaft dynamic heat exchange effect is ignored in an existing pure mechanism model under complex geological conditions can be solved. The technical effects of improving the accuracy and reliability of thermodynamic parameter prediction of the salt-cavern gas storage system, adapting to complex geological conditions and further guaranteeing stable operation of the compressed air energy storage system are achieved.

A microclimate control system for an occupant includes a component that has a thermal effector that is configured to provide thermal conditioning to an occupant. An image capture unit is configured to receive an image of the occupant. A controller is in communication with the image capture unit, the controller includes an extractor algorithm that is configured to extract occupant personal parameters based upon the image. The controller includes a first estimator that is configured to predict an occupant clothing insulation value based upon the occupant personal parameters, and a second estimator is configured to predict occupant anthromorphic characteristics based upon the occupant personal parameters. The controller is configured to regulate the thermal effector based upon the occupant clothing insulation value and the occupant anthromorphic characteristics.

The invention discloses a low-temperature liquid cavitation numerical prediction method considering different-scale heat effects, and belongs to the field of low-temperature liquid cavitation numerical prediction. The implementation method comprises the steps that a corresponding fluid domain geometric model is established, grids are divided, a computational fluid mechanics model is established under the macro-scale, a separation vortex DES turbulence model is adopted, a fluid volume VOF model is used for capturing a macro-scale cavity interface, and convective heat transfer correction under the macro-scale is conducted on a cavitation model; establishing a cavitation kinetic equation considering heat conduction correction under the mesoscale, solving resistance, volume force, additional mass force, pressure gradient force and lift force suffered by the mesoscale discrete cavitation by using a DBM discrete phase model, and obtaining a movement track of the discrete cavitation in a cavitation flow field; and calculating the unsteady cavitation flow by taking a steady result as an initial value to obtain a flow field characteristic under a macroscale and a discrete cavitation dynamic evolution process under a mesoscale, thereby realizing quantitative description and high-precision numerical prediction of the unsteady cavitation flow.

The present invention provides a rotating machine in which the gear housing is less susceptible to the heat effects from the housing cover. The rotating machine (30) includes: a gear housing (36) housing a large gear (34) and a small gear (35); a housing cover (42) configured to form a gap between it and the back of an impeller (41); a drive shaft (43) inserted into a hole (42a) in the housing cover (42) and connecting the impeller (41) and the small gear (35); a mounting part (51) provided on a portion of the opposing surface (37a) of the outer side of the gear housing (36) opposite to the housing cover (42), which is annular or arc-shaped with the rotation center axis of the impeller (41) as the center; and a heat insulation member (53) clamped between the mounting part (51) and the housing cover (42).

The invention is applicable to the technical field of battery devices, and provides a battery device and electric equipment, the battery device comprises a shell part, and the shell part is used as an appearance part of the battery device. The shell part comprises a base body and a protective layer structure. The base body has a first outer surface facing an external environment of the battery device. The protective layer structure is arranged on the first outer surface. The protection layer structure comprises a heat insulation layer, a reflection layer and a pigment layer. The heat insulation layer is arranged on the first outer surface. The reflecting layer is arranged on the side, away from the first outer surface, of the heat insulation layer and used for reflecting infrared radiation and transmitting visible light. The pigment layer is arranged between the heat insulation layer and the reflection layer. The heat insulation layer obstructs heat transmission and reduces the influence of high temperature or low temperature of the external environment on the shell part and the interior of the shell part. The pigment layer colors the first outer surface. The reflecting layer reflects infrared light radiation to the external environment, the probability that heat radiation of infrared light is transmitted to the pigment layer is reduced, the probability that the pigment layer is decomposed due to the heat effect of the infrared light is reduced, and the color changing probability of the pigment layer is reduced.

The utility model discloses ultrasonic cleaning equipment based on a Fresnel lens. The ultrasonic cleaning equipment comprises an ultrasonic generator; an ultrasonic transducer; the ultrasonic cleaning device comprises an ultrasonic transducer, a Fresnel lens and a cleaning container, the Fresnel lens is located between the output end of the ultrasonic transducer and the cleaning container, one end face of the Fresnel lens is tightly attached to an outer shell of the cleaning container, and the other end face of the Fresnel lens is tightly attached to the output end of the ultrasonic transducer; and the placing position of an object to be cleaned in the cleaning container is the focal point of the Fresnel lens. By means of the device, the sound pressure and the sound intensity of an accumulation area can be improved, the time of single-time cleaning is shortened, the energy utilization rate is improved, damage to samples caused by heat effect accumulation is avoided, and meanwhile damage to the surfaces of cleaned objects caused by uneven cavitation due to low power is avoided.

The invention relates to a local magnetothermal coupling biological rotating disc enhanced cold region sewage treatment method and system. The system comprises a reactor, a biological rotating disc for growing a biological membrane, a magnetic heat carrier, an alternating magnetic field generator and a motor for driving the biological rotating disc to rotate, the reactor comprises an air exposure area and a sewage area from top to bottom, a water inlet is formed in the lower part of the left side wall of the reactor, a water outlet flush with the water level of the sewage area is formed in the upper part of the right side wall, the reactor is further provided with vent holes, and the air exposure area is communicated with air through the vent holes; the biological rotating disc is partially immersed in the sewage area and partially exposed to the air exposure area in the radial direction; the air exposure area is located in the magnetic field action range of the alternating magnetic field generator, the magnetic heat carrier is arranged on at least one side of the biological rotating disc, and the magnetic heat carrier generates a magnetocaloric effect under the action of the magnetic field so as to increase the temperature of the biological membrane. According to the invention, the synergistic effect of precise heating of the biological membrane and the metabolic process of the biological membrane is realized, and the efficient and energy-saving sewage denitrification process at low temperature is realized.

The invention discloses a spaceflight structure strength analysis method based on a multi-physics field, which comprises the following steps: establishing a parameterized finite element model integrated with a friction heat generation effect by acquiring in-orbit temperature time sequence data and material creep characteristic parameters, and simulating inelastic strain accumulation of a structure under a thermal cycle load; a nonlinear damage model considering a creep-fatigue interaction effect is adopted to calculate an accumulated damage degree, an effective stiffness matrix is constructed to deduce a structure inherent frequency drift distance and a shape retention capability parameter, and finally, through a safety margin evaluation algorithm, the effective strength of a material and the maximum equivalent stress of the structure are dynamically compared, so that the performance of the material is evaluated. And accurate prediction of quantitative residual strength and safe service life is realized. According to the method, the technical problems that the local thermal coupling effect is not depicted enough and the creep fatigue nonlinear interaction effect is ignored are solved, and the precision and reliability of on-orbit performance degradation prediction of the spaceflight flexible structure are remarkably improved.

The invention provides a thermal resistance model construction method of an LDMOS (Laterally Diffused Metal Oxide Semiconductor) device, which is characterized in that a plurality of N-type doped isolation layers are formed on a substrate, an LDMOS structure is formed on each N-type doped isolation layer, all LDMOS structures are divided into different test groups according to different key sizes, and the key sizes at least comprise a total channel width and a cross index; measuring the thermal resistance of the LDMOS structure in each test group so as to respectively extract a thermal resistance value array of each group, and performing data fitting on the thermal resistance value array of each group so as to obtain a thermal resistance model of the relationship between the thermal resistance value of the LDMOS structure and the critical dimension; according to the method, the thermal resistance model of the full-size LDMOS device can be constructed by only utilizing a limited number of LDMOS structures in a primary tape, so that the thermal resistance of the LDMOS devices with different sizes can be predicted, the self-heating effect of the device can be accurately evaluated in the design stage, the device design is optimized, the development cost of the device is reduced, and the research and development period is shortened.

The utility model discloses a turnover embracing column support for accurate positioning and installation of a large-span orthogonal steel truss, which comprises a steel column, an annular steel column hoop is connected with the steel column through high-strength bolts, a triangular steel platform is welded with the annular steel column hoop, steel column brackets are arranged on two sides of the steel column, and the triangular steel platform is connected with the annular steel column hoop through high-strength bolts. The steel column bracket is used for being welded with a large-span orthogonal truss steel beam; steel column hoops are arranged on supports on the two sides of a large-span steel structure, a tripod steel platform is hinged to steel columns, and the tripod steel platform serves as a supporting point of the large-span steel truss and serves as a horse stool for welding a vertical component bracket and the large-span steel truss, so that a welder is helped to keep a welding piece at the correct position and angle, and the welding efficiency is improved. In the welding process of the large-span steel truss, the split heads can prevent a welding piece from displacing due to the influence of gravity or welding heat in the welding process, meanwhile, uniform supporting force can be provided, thermal deformation in the welding process can be reduced, the original shape and size of a steel structure can be kept, and therefore the welding precision and quality are guaranteed.

The application discloses a production line fault checking method based on a regional attention learning mechanism, relates to the technical field of production line fault checking, and synchronously collects low-frequency vibration, high-frequency acoustic emission and temperature time sequence signals, covers multidimensional fault characteristics such as mechanical wear, shaft misalignment and thermal effect abnormality, and solves the problem that traditional single signal detection is not complete. According to different signal characteristics, key abnormal characteristics are focused, redundant noise is filtered, and the effectiveness of the characteristics is improved. A collaborative degradation factor model is constructed based on health history data, the weight coefficient is dynamically adjusted through maintenance post-down rate feedback, the device working condition change is adapted, and the poor adaptability of the static model is avoided. The maintenance effect (collaborative degradation factor down rate) is quantitatively evaluated, accurate maintenance is guided, invalid maintenance is reduced, and the production line operation and maintenance efficiency is improved.

The present application relates to the technical field of micro-nano functional materials, and particularly relates to a high-efficiency light-heat conversion and wear-resistant super-hydrophobic coating, a preparation method thereof and an application thereof in ice prevention and removal, the preparation method adopts ammonium persulfate as an oxidant to initiate polymerization of pyrrole on the surface of halloysite nanotubes to generate polypyrrole, so as to obtain a halloysite nanotube composite material wrapped by polypyrrole. The super-hydrophobic coating is obtained by mixing the composite material with low-surface-energy polydimethylsiloxane, and the coating layer formed by the super-hydrophobic coating has the characteristics of high roughness and low surface energy, and thus has excellent hydrophobic performance. The coating layer also has good light-heat effect, flexibility, elasticity, mechanical performance, high-temperature resistance and durability. In addition, by adding hydrophobic nano-SiO2, the super-hydrophobic performance of the coating layer is further improved, and the hardness and wear resistance of the coating layer are also enhanced. Finally, the coating layer has excellent light absorption capacity and light-heat conversion efficiency, and realizes the performance of efficient protection and ice layer removal in the application of ice prevention and removal.

This invention relates to the field of semiconductor lithography error correction technology, specifically a lithography machine error correction method and system. The method includes: deploying an interferometric sampling array to capture the initial wavefront phase distribution to obtain a reference wavefront field; using a thermal drift separation operator to remove the slowly varying drift component caused by environmental thermal effects; and using multidimensional convolution matching between the residual wavefront field and a nominal lens aberration feature library to identify static aberration patterns, generating an inverse aberration compensation driving signal. A time-varying trend predictor based on a Kalman filter framework is used to continuously estimate future thermal drift, which is then superimposed with the inverse aberration compensation driving signal to synthesize a composite correction instruction set. Based on this instruction set, the workpiece stage positioning system and the projection lens focusing system are jointly kinematically adjusted to offset the overlay error jointly introduced by aberrations and thermal deformation. This method can separate the thermal drift component, improve aberration recognition accuracy, and achieve feedforward thermal drift correction and dual-system coordinated adjustment.

The utility model discloses an efficient heating plate, which comprises a shell, a heating coil is arranged in the shell, a cover plate is fixed at the top end of the shell, five groups of through cavities are circumferentially distributed on the cover plate, rotating columns are arranged in the through cavities, a plurality of groups of flow guide cavities are arranged on the rotating columns in an array manner, and a bearing ring is fixed on the outer side of the cover plate. The heating device has the beneficial effects that by arranging the driving motor, the rotating column, the flow guide cavity and the through cavity, in the heating process, the driving motor drives the rotating column to rotate by 90 degrees to expose the flow guide cavity, at the moment, part of heat generated by the heating coil can directly heat an object through the flow guide cavity, and the situation that the object completely passes through the cover plate to generate a large amount of loss is avoided; the heating efficiency of the device is effectively improved, meanwhile, when the device is not used, the rotating column rotates reversely to hide the flow guide cavity, then the through cavity is sealed, dustproof protection is conducted on the heating coil, the heating effect is good, and the use performance is high.

The utility model discloses an aluminum cone core composite board with a graphene heating module, which comprises an aluminum cone core substrate, the periphery of the aluminum cone core substrate is turned upwards to form a closed upper enclosure bulkhead, a groove is formed in the upper enclosure bulkhead, the aluminum cone core composite board is characterized by further comprising the graphene heating module, the graphene heating module is fixed in the groove, and the graphene heating module is fixed in the groove. The graphene heating module comprises a shielding shell, a graphene heating layer, a flame-retardant layer and a reflecting layer which are sequentially attached from bottom to top; according to the aluminum cone core composite board with the graphene heating module, heat generated by the graphene heating module can be dissipated through the aluminum cone core composite board, so that the aluminum cone core composite board further has a heating function and can meet more use requirements of users, meanwhile, the shielding shell can play a good insulating role, and the service life of the aluminum cone core composite board is prolonged. The situation of electric leakage during heating work of the graphene heating layer is avoided, and the reflecting layer can play a good role in reflecting heat, so that the heat generated by the graphene heating layer is dissipated towards the aluminum cone core substrate.

The utility model discloses a low-energy-consumption heating system in a supercritical foaming process, which belongs to the supercritical foaming process technology, and comprises a support frame, a fixed shell is fixedly mounted on the support frame, a connecting port is formed in the fixed shell, and the connecting port is communicated with the fixed shell. The connecting ports are mutually connected through a fixing pipe, the inner wall of one connecting port is fixedly connected with a fixing frame, a motor is fixedly mounted on the fixing frame, and the output end of the motor is fixedly connected with a rotating rod. In the process that raw materials are pushed by the spiral push rod, hot air flows to the other side through structures such as the fixing pipe, the range needed by heating is reduced, energy consumption is reduced, meanwhile, the flowing hot air is better in heating effect, the stirring rod rotates through flowing of the air, the raw materials and foaming agents are stirred, and the stirring efficiency is improved. The raw materials and the foaming agent are mixed more uniformly, and use of the device is facilitated.

The invention relates to the technical field of semiconductor manufacturing, in particular to a device for renovating an electrostatic chuck and a renovating method, and the device for renovating the electrostatic chuck comprises a vacuum cavity, a workpiece table and a laser generating and beam combining mechanism integrated with an ultraviolet laser, an infrared laser and a dichroscope. The dichroscope combines the two laser beams to the same light path and accurately points to the electrostatic chuck, during renovation, the central processing unit controls the ultraviolet pulse laser and the infrared pulse laser to alternately act on a cleaning area at extremely short intervals, the real-time monitoring mechanism feeds back the cleaning state, and closed-loop control is achieved. Through non-contact processing, energy accurately acts on a thin film layer, ultraviolet light firstly destroys chemical bonds of the hard thin film, infrared light immediately peels the hard thin film through the heat effect, the problems of base body abrasion and thickness reduction caused by mechanical grinding and polishing are fundamentally avoided, meanwhile, strong acid and strong base are not needed, and the method is environmentally friendly. And the microscopic damage and defects of the matrix caused by chemical corrosion are thoroughly eliminated.

The invention belongs to the technical field of additive manufacturing of material components, and discloses a mirror image additive manufacturing method of a composite material component considering an in-layer heat effect, which comprises the following steps: firstly, determining the position of a geometric central plane of the composite material component to be manufactured, and then generating a printing path of each deposition; two printing paths for single deposition are arranged and are in mirror symmetry along the geometric central plane, then double printing tail ends which are in mirror symmetry along the geometric central plane and of which the pressure applying directions are in the normal direction of the geometric central plane are arranged, and finally the double printing tail ends are controlled to synchronously move along the printing paths so as to deposit the strip layer by layer from the geometric central plane to the two sides; and in the single deposition process, the thermal power Q of the two heating devices conveyed to the strip is adjusted along with the change of the printing process, so that the temperature of the strip consolidation area is stabilized at the target temperature. According to the method, the temperature of the strip consolidation area can be stabilized at the target temperature all the time, and the problem of heat accumulation or heat loss caused by the difference between heat input and heat dissipation level in the manufacturing process is avoided.

The invention discloses a power transmission tunnel ventilation system optimization design method based on negative heat source equivalence and multi-field coupling, and belongs to the technical field of power transmission engineering. Aiming at the problems that the three-dimensional fluid simulation calculation amount of the long-distance underground power transmission tunnel is huge and parameterized optimization is difficult to carry out, the method comprises the following steps: firstly, constructing a two-dimensional finite element model containing an equivalent negative heat source, and mapping the heat dissipation effect of air axial flow into section heat absorption power; then, through electromagnetic-heat-flow multi-physics field coupling calculation, the maximum allowable current-carrying capacity under different ventilation wind speeds and vertical shaft distances is obtained; and finally, establishing a full-life-cycle comprehensive cost function including the capital construction project amount, the ventilation node project amount and the operation energy consumption, and determining optimal ventilation design parameters through an optimization decision. According to the method, the calculation time is remarkably shortened on the premise that the calculation precision is guaranteed, and economic and technical collaborative optimization of the ventilation system of the power transmission tunnel can be rapidly achieved.

The utility model relates to a nanobubble preparation device based on a resistance thermal effect. The nanobubble preparation device based on the resistance heat effect comprises a box body, the bottom of the box body is fixedly connected with two fixing plates which are arranged in parallel at intervals, the opposite side faces of the two fixing plates are each provided with a plurality of inserting grooves which are distributed at equal intervals in the length direction, and the inserting grooves in the two sides are distributed in a mirror symmetry mode to jointly form a positioning groove of a heat production resistor; the two ends of each heat generation resistor are embedded in the corresponding positioning grooves respectively, a composite heat conduction coating layer is arranged on the surface of each heat generation resistor, the composite heat conduction coating layers are formed by aluminum foil and tin foil in a composite lamination mode and tightly wrap the outer surfaces of the heat generation resistors, and micron-scale channels or nano-scale holes are formed in the surfaces of the composite heat conduction coating layers through laser etching. Therefore, bubble nucleation is promoted. The nanobubble preparation device based on the resistance thermal effect solves the problems of low nanobubble generation efficiency, non-uniform size, poor stability and the like in the prior art.

The utility model provides a kind of plastic coating device for variable thick color steel plate, belong to color steel plate plastic coating technical field, including fixed plate and servo screw rod, the top of fixed plate is fixedly connected with servo screw rod, the output end of two servo screw rods is fixedly connected with permanent magnet, the top of fixed plate is fixedly connected with fixed frame, the top of fixed frame is penetratedly connected with electric telescopic rod, the tail end of electric telescopic rod is fixedly connected with scratch piece.The utility model is through the air exchange fan and electric heating tube of shielding shell setting, when servo screw rod drives color steel plate to move to the inboard of shielding shell, air exchange fan promotes the air flow rate inboard of shielding shell, electric resistance wire in electric heating tube is via electric heating effect, color steel plate is dried, and then the efficiency of color steel plate plastic coating is improved.

(Problem) A method for manufacturing a device chip capable of suppressing thermal effects on a resin layer during segmentation processing by a laser beam is provided. (Solution) A method for manufacturing a device chip comprises dividing a wafer, in which a plurality of devices are formed in an area partitioned by a grid-shaped partitioning line set on the surface, into individual devices to manufacture the device chip, and comprises a resin layer forming step (1) for forming a resin layer on the surface side of the wafer, a resin layer processing step (3) for forming a laser processing groove in the resin layer by irradiating a laser beam with a first output along the partitioning line from the side where the resin layer is formed after the resin layer forming step (1), and a wafer cutting step (4) for cutting the wafer by irradiating a laser beam along the laser processing groove with a second output greater than the first output after the resin layer processing step (3).

The application belongs to the technical field of laser processing equipment, and discloses a light beam deflection mechanism applied to rapid scanning of a soft ceramic laser drilling and cavity opening equipment, comprising a two-dimensional acousto-optic deflection assembly, a radio frequency driving control system, a precision adjustment fixing assembly, an optical auxiliary assembly and a cooling and heat dissipation assembly, wherein each assembly is cooperatively matched and linked with an equipment galvanometer system and an XY moving platform; after being optimized by the optical auxiliary assembly, a laser beam is incident into the two-dimensional acousto-optic deflection assembly, the radio frequency driving control system is adjusted to realize high-precision and rapid deflection of the light beam, the precision adjustment fixing assembly guarantees positioning accuracy, and the cooling and heat dissipation assembly controls thermal effects. The application realizes 0.1 mu rad deflection accuracy and 1 mu s scanning switching speed, controls the soft ceramic processing thermal effect area within 5 mu m, and can satisfy fine processing of through holes, buried holes, blind holes and <50 mu m micro holes.

The invention relates to the technical field of stainless steel seamless tube heat treatment, and discloses a heat treatment temperature control system for a stainless steel seamless tube, which comprises a data processing unit and a temperature control unit, calculating a wall thickness heat absorption weight factor modulated by a power supply frequency and a circumferential heat flow migration factor determined by a pipe rotation speed; and further solving the critical form frequency which enables the wall thickness heat absorption effect and the gap fluctuation effect to counteract each other under the action of heat flow migration. The multivariable execution unit monitors the circumferential temperature curvature in the direction of the thinnest wall in real time, the critical form frequency serves as the regulation and control standard, a local temperature curvature closed loop follows a preset target by cooperatively adjusting the power frequency and the rotating speed, dynamic balance of a circumferential temperature field of a pipe body is achieved, and therefore the heat treatment uniformity and the process stability are improved.

The utility model discloses a special-shaped filler strip in the technical field of heat exchanger equipment, which comprises a strip body, the strip body mainly comprises a bottom strip and a side strip, the side strip is connected to one side of the top of the bottom strip, a plurality of grooves are formed in the top of the side strip along the length direction at equal intervals, and the grooves are inclined. The filler strip adopts the L-shaped special-shaped design, the grooves are formed in the side strips at equal intervals, it is ensured that the intervals of all layers of pipes are consistent, and the grooves are inclined, so that when the filler strip is used in a winding type heat exchanger, the convection quantity and the flow speed of media or gas can be increased, the heat exchange effect of equipment can be improved, meanwhile, the pipes can be better fixed, and the service life of the equipment is prolonged. Overall vibration and noise of pipes and equipment are reduced, stability is improved, the flow and the flow speed of liquid or gas in the heat exchanger are ensured, and the service life of the equipment is prolonged.

The invention relates to the technical field of energetic materials, in particular to nickel fluoride catalyzed ammonium perchlorate / aluminum composite fuel and a preparation method and application thereof. The ammonium perchlorate / aluminum composite fuel consists of the following components in percentage by mass: 50-70% of ammonium perchlorate, 0-10% of nickel fluoride and the balance of aluminum powder. Due to the addition of NiF2, high and low decomposition peaks of AP are combined into a violent exothermic peak, and the temperature of the high-temperature decomposition peak is reduced by about 30 DEG C, which means that the burning rate of the propellant can be greatly improved; the heat effect of the fluorination reaction (55.98 kJ. G <-1 >) of aluminum is far higher than the heat effect of the oxidation reaction (31.05 kJ. G <-1 >) of aluminum, so that the explosion heat is improved by about 10% while the reaction path is optimized. Besides, the anhydrous NiF2 used in the formula is stable in physical and chemical properties and does not absorb moisture and deliquesce, the problem of long-term storage of common fluorides such as CuF2 and FeF3 is solved, and the product reliability is extremely high.

The application discloses a magnetic pressure coupling refrigeration device, which comprises a water piston, a hot-end heat exchanger, a cold-end heat exchanger, a magnetic pressure regenerator, a first driving member and a second driving member. The water piston comprises a piston cylinder, a pear-shaped workpiece and two pistons arranged in the piston cylinder. The two pistons are symmetrically arranged on the two sides of the pear-shaped workpiece and abut against the pear-shaped workpiece. The left cavity and the right cavity of the water piston are sequentially communicated with the hot-end heat exchanger, the cold-end heat exchanger and the magnetic pressure regenerator through pipelines. A plurality of electromagnetic valves are arranged on the pipelines. The outer periphery of the magnetic pressure regenerator is sleeved with double-layer concentric Halbach magnets. The first driving member is connected to the pear-shaped workpiece and the inner-layer concentric Halbach magnet. The second driving member is connected to the pear-shaped workpiece and used for driving the pear-shaped workpiece to move horizontally along the piston cylinder. The device combines the magnetic heat effect and the pressure heat effect, adopts a clever structure design, realizes the magnetic pressure coupling refrigeration, reduces the volume of the refrigeration device and improves the refrigeration efficiency of the refrigeration device.

The invention provides a clothing finishing agent production line energy efficiency optimization method and system based on digital twinning. According to the method, clothes surface temperature field data are captured through a thermal infrared imager, and a thermodynamic diagram marking high-temperature and low-temperature area distribution is generated through regional temperature difference analysis; a semiconductor temperature control unit is integrated in the drying box, the current flux is adjusted based on the thermodynamic diagram temperature difference, and the high-temperature area directional refrigeration and low-temperature area compensation heating effect are triggered; the temperature difference is converted into a temperature control instruction parameter to drive partition temperature control operation by applying a thermal field equalization algorithm; the current flux is dynamically corrected according to temperature field data fed back in real time, the current increase and decrease amplitude is adjusted through a two-stage control mechanism, and cooperation of continuous balance of the temperature field and energy consumption optimization of the semiconductor unit is achieved. According to the invention, the dynamic balance of the micron-order fluctuation interval of the drying temperature field is realized, the temperature difference range is reduced, the comprehensive energy consumption is reduced and the thermal damage risk of the fabric is eliminated.