38 results about "Point heat source" patented technology

The invention provides a laser cladding 3D / 4D printing system and method, and the method comprises the following steps: S1, constructing a three-dimensional model of a to-be-printed piece, slicing the three-dimensional model, and generating a two-dimensional interface diagram of each layer of printing; s2, the additive manufacturing material of the current layer is melted through first laser to form a cladding layer; s3, carrying out micro-shaping on the surface of the cladding layer by using second laser, firstly carrying out micro-shaping on rough and hole defect areas on the surface of the cladding layer, and then carrying out point heat source irradiation on the surface of the cladding layer to eliminate residual stress of the cladding layer; and S4, the steps S2-S3 are repeated, the additive manufacturing process of each layer is completed, and a printed piece is obtained. According to the method, ultrafast laser shaping is carried out on the cladding layer in the laser 3D / 4D printing process, so that the problems of residual stress, interface-surface holes, uneven roughness and powder agglomeration and accumulation of the cladding layer of a laser 3D / 4D printing workpiece are solved, and the quality of the laser 3D / 4D printing workpiece is improved.

The invention discloses a gear forming grinding contact area temperature field calculation method based on a single-abrasive-particle cutting heat production mechanism, and the method comprises the steps: firstly, calculating the undeformed cutting thickness according to the geometric contact relation between abrasive particles and a tooth surface, and judging that the abrasive particles are in a scraping, ploughing or cutting stage; then, the heat flux density generated by each abrasive particle is calculated in stages, the proportion of heat transmitted into the workpiece is determined according to a dynamic heat distribution mechanism, and then the heat flux density distribution of a contact area is obtained through fitting; and finally, on the basis of a moving heat source model and a point heat source superposition method, a temperature field of the gear forming grinding contact area is constructed and solved. According to the method, the limitation that a traditional model adopts fixed heat flow distribution is overcome, accurate prediction of the grinding temperature field is achieved from the physical mechanism level, and a key theoretical basis is provided for effectively controlling tooth surface heat damage and improving gear machining quality.

The invention discloses a multi-heat-source digital twin model automatic optimization and decoupling control method and system, and the method comprises the steps: constructing a local two-dimensional plane coordinate system, obtaining the end point coordinates of heat sources, and calculating the heat radiation intensity of the heat sources to a target point; establishing a geometric parameter model of the additive manufacturing multi-heat-source system, and establishing a radiation field response model of the multi-heat-source system based on a linear superposition principle; according to the heating requirement of additive manufacturing, a target heat radiation field is designed, optimal power distribution of the target heat radiation field is calculated, and optimal heat source structure parameters are determined based on geometric constraints of a physical basis; and according to the optimal heat source structure parameters, a decoupling control rule is designed, and heat source power is adjusted according to feedback data to compensate deviation. According to the method, the point heat source, the line heat source and the plane heat source are abstracted into the line heat source in a unified mode, a universal frame is provided for digital modeling of a complex multi-heat-source system, and the complexity of modeling for different heat source types is avoided.

An omnidirectional heat exchanger structure, relating to the field of temperature regulation, includes an upper plate and a lower plate, and multiple transverse and longitudinal partitions disposed between the upper and lower plates. The transverse and longitudinal partitions are arranged in a staggered manner, dividing the internal space between the upper and lower plates into multiple closed sub-cavities. Each transverse and longitudinal partition is also provided with multiple connecting holes, which connect adjacent sub-cavities. Each connecting hole is equipped with a thermistor, which achieves passive bending deformation through the thermal expansion difference of the three-layer thermistor structure. The opening and closing of the connecting holes are automatically adjusted according to the real-time temperature difference between the sub-cavities, so that the condensate in the high-temperature zone is preferentially replenished, effectively preventing the working fluid in the high-temperature zone from drying out, and significantly improving the temperature uniformity performance and reliability of the heat exchanger under multi-point heat source and non-uniform heat load conditions.

The invention discloses an internal meshing powerful gear honing tooth surface temperature field calculation method based on a superposition point heat source, and belongs to the technical field of gear machining and manufacturing. Comprising the steps of constructing a tooth surface equation and a honing machining coordinate system, calculating a relative speed vector between a gear and a honing wheel in the honing machining process, determining a tooth surface contact point based on the meshing principle according to the relative speed vector between the gear and the honing wheel, calculating the heat flux density at the tooth surface contact point, and obtaining a continuous tooth surface contact line heat source based on the heat flux density. On the basis of the point heat source superposition principle, contact point heat sources of the whole tooth surface are superposed, and the temperature rise generated by the whole tooth surface to a target point in the honing machining process is calculated. According to the method, the dynamic gear honing machining process is accurately simulated, the problem that a traditional temperature field method is not applicable is solved, through high-precision calculation, gear surface burning can be effectively prevented, the technology is optimized, residual stress is predicted, a key tool is provided for improving gear quality, and the method is efficient in calculation and convenient for engineering application.

The invention relates to the technical field of gear machining, and discloses an internal gearing powerful gear honing tooth surface residual stress field calculation method based on force-heat coupling. The method comprises the following steps: establishing a honing motion coordinate system to calculate three-dimensional coordinates and relative speed of a contact point, and constructing a three-dimensional to two-dimensional coordinate mapping mechanism; constructing a tooth surface temperature field model based on the relative speed, the correction of heat taken away by cuttings and the point heat source superposition principle; respectively solving mechanical and thermal load stress fields based on the two-dimensional coordinates and the temperature field, and superposing to obtain total elastic stress; and an elastic-plastic constitutive relation and a yield criterion are introduced, stress relaxation calculation is performed through a step-by-step unloading method and a plastic release stress balance equation, and the final residual stress is obtained. The method solves the problems of lack of force-heat coupling mechanism analysis and insufficient stress evolution calculation precision in the prior art, and realizes accurate prediction of the internal meshing gear honing residual stress.

The invention relates to the technical field of vacuum coating, in particular to a vacuum coating device comprising a vaporizing chamber, a heat source device and a gas uniformizing device. The heat source device adopts double induction coils with current frequency difference to perform composite heating on the crucible, and the high-frequency skin effect and the low-frequency penetration effect are combined to realize rapid and uniform evaporation of materials. Vapor flow distribution is accurately regulated and controlled through dynamic local shielding, and the problems that in the prior art, due to the fact that heating inside and outside a linear evaporation source crucible is uneven, evaporation of internal materials is unstable, meanwhile, point heat sources are in point-shaped eruption, divergence angles are overlapped, the thickness of an evaporation film is uneven, and the evaporation effect is poor are solved. And the evaporation effect is poor.

The invention discloses a bionic micro-channel heat sink which comprises a working medium inlet, an inlet flow equalizing buffer tank, a first micro-channel structure, a second micro-channel structure, an outlet liquid collecting tank and a working medium outlet. The first micro-channel structure is a stepped micro-channel structure and comprises a micro-column array arranged below a high-heat-flux point heat source, a micro-channel structure in a first low-heat-flux area and a mitral valve simulating structure, and the micro-channel structures are located on the two sides of the micro-column array; the second micro-channel structure is located in a second low-heat-flux area between the two first micro-channel structures; the micro-channels have the same height and height and are symmetrically distributed along the center line of the heat sink. According to the micro-channel structure optimization design, gas-liquid two-phase evolution behaviors such as three-phase line motion and liquid film thickness in the liquid film spreading process in the micro-channel are improved, the flow resistance of a working medium is effectively reduced, and the thermal performance of the micro-channel heat sink under the condition of high heat flux density is improved.

A position-sensitive detector derived from heat transfer principles and thermoelectric effect that detects the position of a single heat spot on the detection surface precisely includes a substrate electrically insulating least on a surface, a thermoelectric film applied or deposited to the substrate, a first metallic contact on a first side of the thermoelectric film, and a second metallic contact on a second side of the thermoelectric film. The thermoelectric detector is configured to determine a position of a point heat source on the substrate by measuring an electrical potential difference between the first metallic contact and the second metallic contact.

A high thermal conductivity and phase change integrated heat sink housing for a TR module and its molding method are disclosed. The TR module heat sink housing includes a phase change cavity and a high thermal conductivity cavity. The high thermal conductivity cavity extends through the hot and cold ends of the heat sink housing and is equipped with a high thermal conductivity core material. The phase change cavity contains a phase change material, with the high thermal conductivity core material located directly below the chip. This TR module heat sink housing integrates the TR module housing and the high thermal conductivity phase change material into a single structure, enabling rapid and uniform heat dissipation directly below the chip, thus reducing the chip temperature. By incorporating the high thermal conductivity cavity and phase change cavity within the housing, this TR module heat sink housing not only achieves uniform temperature within the TR module housing but also directly ensures uniform temperature of the chip's heat source, reducing the temperature gradient and contact thermal resistance from the chip's heat source to the TR module's end, thereby improving the performance of high-power chips.

The utility model discloses a micro-channel heat exchange device, which belongs to the field of enhanced heat exchange, and comprises a cooling substrate and a shunting partition plate, the cooling substrate is provided with a double-layer micro-channel cooling structure, a column rib and a micro-channel, and the double-layer micro-channel cooling structure comprises a heat exchange layer and a medium cooling layer and is used for prolonging the heat exchange time. A cooling groove is formed in the cooling base plate, a background heat source and a plurality of hot spot heat sources arranged in a matrix mode are arranged at the bottom of the cooling groove, a plurality of sets of micro-channels are arranged in the cooling groove, and a plurality of sets of column ribs and a plurality of double-layer micro-channel cooling structures are arranged between every two adjacent sets of micro-channels. The double-layer micro-channel cooling structure is arranged above a hot spot heat source, and the micro-channels and the column ribs are arranged above a background heat source; according to the utility model, heat transfer can be enhanced, and high-efficiency heat exchange is realized.

The invention provides a power inductor gradient forming method and device based on high-temperature oil circulation hot pressing, and relates to the technical field of inductor preparation. The method comprises the steps that iron-based amorphous alloy powder is obtained, and a mold is heated; feeding the iron-based amorphous alloy powder into a mold cavity of a heated mold, and pressing the iron-based amorphous alloy powder according to preset pressure to obtain a magnetic powder core; and annealing the obtained magnetic powder core to prepare the power inductor. The high-temperature oil circulation system is used for achieving mold global dynamic heat conduction, compared with a resistance rod point heat source mode, temperature gradient fluctuation and inductor magnetic core density deviation are reduced, product Q value stability is improved, and the problem of magnetic domain distortion caused by local overheating is effectively solved; and secondly, a closed oil way heat recovery framework is innovatively adopted, the thermal inertia of the system is reduced, the preheating time is shortened, the heating efficiency is improved, a temperature control algorithm is combined, accurate temperature control is achieved, and comprehensive energy consumption is reduced.

The application discloses a modular aluminum foil annealing furnace and relates to the field of heat treatment equipment.The technical scheme is as follows: a wind source and a heating device are externally arranged on the top of a furnace body; a heat conduction layer and a heat conduction rod are arranged on the inner wall of the furnace body; the high-temperature airflow after being heated is transported through the air inlet air duct arranged on the top wall and the side wall of the furnace body and in contact with the heat conduction layer, so that the whole inner wall of the furnace body is preheated into a large-area and uniform planar heat source; the air blowing air duct arranged on the bottom wall of the furnace body sends the air into the furnace from bottom to top, and the air is recovered through the air return air duct on the top wall, so that an orderly vertical circulating airflow is formed.The application converts the impingement point heat source into a moderate planar heat source, builds an efficient heat recovery path and a uniform vertical airflow field, fundamentally solves the technical problems of low heat efficiency and poor temperature uniformity of the external scheme, meanwhile, the advantages of easy maintenance of the components are retained, and the unification of high thermal performance and high operation reliability is realized.

The present application relates to winding hot spot temperature detection technical field, specifically to a kind of winding hot spot temperature nondestructive detection method and system based on active ultrasonic emission, wherein, the method includes the following steps: based on the propagation process of sound wave between different media establishes ultrasonic propagation model;The geometric model of transformer is established, and there are several ultrasonic sensors on the surface of the box of geometric model;By setting point heat source in geometric model simulating hot spot fault, the temperature field of hot spot fault at different positions at different temperatures is simulated;Based on the internal temperature field distribution of the geometric model of transformer, active ultrasonic emission is carried out using ultrasonic propagation model, and the sound pressure distribution diagram of ultrasonic wave crossing temperature field is obtained;According to the data set of sound pressure distribution, the effective signal of sound wave is extracted;According to the signal characteristic parameter of sound wave effective signal, the inversion database of hot spot area-hot spot temperature is established by training reverse propagation neural network.

The application provides a laser cladding 3D / 4D printing system and method, comprising the following steps: S1, constructing a three-dimensional model of a to-be-printed piece, and slicing the three-dimensional model to generate a two-dimensional interface graph of each layer of printing; S2, using a first laser to melt additive manufacturing material of a current layer to form a cladding layer; S3, using a second laser to perform micro-shaping on the surface of the cladding layer, first performing micro-shaping on the rough and hole defect area of the surface of the cladding layer, then performing point heat source irradiation on the surface of the cladding layer to eliminate residual stress of the cladding layer; S4, repeating steps S2-S3 to complete the additive manufacturing process of each layer to obtain a printed piece. The application eliminates the residual stress of the cladding layer of the laser 3D / 4D printed workpiece, the hole of the interface-surface, the uneven roughness and the powder agglomeration accumulation problem by performing ultrafast laser shaping on the cladding layer in the laser 3D / 4D printing process, thereby improving the quality of the laser 3D / 4D printed piece.

The utility model discloses an electromagnetic heating module and an electromagnetic heating cooking utensil. The electromagnetic heating module comprises at least one first coil and at least one second coil. The first coil is used for generating a first alternating magnetic field after being electrified, and the winding center of the first coil deviates from the central axis of the electromagnetic heating module. The second coil is used for generating a second alternating magnetic field after being electrified, and the winding center of the second coil is located on the central axis of the electromagnetic heating module. According to the electromagnetic heating module, the first coil can provide a magnetic field which is non-uniformly distributed in the circumferential direction of the electromagnetic heating module, and the second coil can provide a magnetic field which is uniformly distributed in the circumferential direction of the electromagnetic heating module. When the magnetic field and the cooking container rotate relatively, the magnetic field of the first coil forms a multi-point heat source rotating heating effect, and the magnetic field of the second coil forms a fixed heat source heating effect. Therefore, heat sources of the two coils can be complementary, food materials can be fully turned over, and the cooking quality can be improved.

The invention discloses a multi-layer printed PCB (Printed Circuit Board) capable of efficiently dissipating heat and a use method of the multi-layer printed PCB. The circuit board has the beneficial effects that when the circuit board is mounted in the mounting shell, the insertion rod is inserted into the insertion groove in the limiting plate in a pressing manner, so that the circuit board body can be quickly limited through the matching of the clamping head and the clamping hole when the insertion rod is inserted into the insertion groove, and the circuit board body can be quickly mounted; meanwhile, when the circuit board body is disassembled, the two shifting plates on the same limiting plate are moved close to each other, so that the clamping heads can be moved out of the clamping holes under the action of the shifting plates and the pull rods, and the insertion rods are ejected outwards on the ejection plate and the second spring, so that the circuit board body is quickly disassembled; meanwhile, under the action of the heat dissipation mechanism, the heat dissipation area is increased, the heat uniformizing and structure supporting effects are further achieved, a point heat source is rapidly diffused into a surface heat source, then the surface heat source is efficiently guided to the heat dissipation aluminum plate at the bottom, a high-temperature area is not prone to being formed below the circuit board body, and the overall heat dissipation efficiency is higher.

The application discloses a kind of single abrasive grain ultrasonic grinding temperature field numerical simulation method, comprising: S100. Establish single abrasive grain ultrasonic grinding model, determine the motion trajectory when abrasive grain grinds workpiece;S200. Calculate the heat flow intensity of workpiece when abrasive grain grinds workpiece, according to the motion trajectory of abrasive grain, establish the heat source model of Gaussian distribution;S300. Establish the temperature field algorithm model of workpiece, the specific process includes: S301. The heat conduction process of workpiece is simplified as two-dimensional heat conduction, establishes two-dimensional heat conduction partial differential equation;S302. According to the heat source model of step S200, establish the calculation equation of temperature field generated by arbitrary point heat source to workpiece;S303. Simultaneous solution two-dimensional heat conduction partial differential equation and the calculation equation of temperature field generated by arbitrary point heat source to workpiece. In the application, the temperature field of workpiece in grinding area during single abrasive grain ultrasonic grinding process can be quickly predicted, the problem of temperature increasing effect caused by time-varying movable heat source can be solved simultaneously, the calculation result is very accurate, and the application is suitable for popularization and use.

The present invention provides an energy storage type heat spreader device, comprising: a phase change energy storage structure, a flat plate heat pipe; the phase change energy storage structure and the flat plate heat pipe are coupled; the interior of the phase change energy storage structure uses metal foam (2); the flat plate heat pipe includes: a capillary structure (4), a steam chamber (5); and the capillary structure is filled with a heat pipe working medium (6). The present invention can realize the integrated integration technology of the flat plate heat pipe and the phase change energy storage material, while taking into account the temperature averaging capability of the flat plate heat pipe and the energy storage function of the phase change material, and can reduce the temperature shock of the periodic heat source, effectively suppress temperature fluctuations, and at the same time improve the adaptability of the flat plate heat pipe to distributed heat sources and the temperature averaging capability of point heat sources.

The application provides a high-efficiency rock thermal conductivity test device and test method for simulating a natural confining pressure environment. The test device comprises an upper computer, a confining pressure loading system and a test measurement system, and the confining pressure loading system and the test measurement system are arranged above and below and controlled by the upper computer. The application can provide a high-efficiency and accurate test method for simulating the change rule of the thermal conductivity of rocks under a natural stress environment. The confining pressure loading system is adopted in the design, and true triaxial confining pressure can be applied to the sample to simulate the stress environment of the natural rock mass. The confining pressure loading system contains four confining pressure loading bins, and four samples can be measured at the same time to improve the test efficiency and form a comparative test. The optical scanning technology based on the mobile point heat source principle is adopted to test the thermal conductivity of the sample, and the test speed is fast and the precision is high. The sample size is small, the cubic sample is small, the test surface height difference is small, and the size is greater than the scanning channel, which can meet the test needs.

The biomass fuel raw material drying device comprises a supporting frame and a feeding structure arranged on the supporting frame, the feeding structure comprises a feeding barrel arranged on the supporting frame, the upper half portion of the feeding barrel is provided with an opening and a breathable screen frame, the bottom of the feeding barrel is provided with a discharging port and a heating piece, the breathable screen frame is provided with a feeding port, a feeding auger is arranged in the feeding barrel, and the feeding auger is arranged on the supporting frame. The end of the feeding auger is connected with the output end of a motor, the motor is connected with the feeding barrel through a first fixing base, and an auxiliary drying structure is arranged at the bottom of the feeding barrel. By the adoption of the structure, dynamic drying is achieved, fixed-point heat source radiation is matched with feeding, materials are continuously rolled and conveyed, heating is more uniform, water evaporation is fast, and energy consumption is low; the drying cavity is simple and practical in structure, convenient to open, close and clean and easy to operate; and hot air is matched, air is continuously driven to flow in the drying process, damp and hot air is prevented from continuously circulating in the cavity and being rapidly discharged, and secondary moisture absorption is avoided.

The application discloses a kind of end mill tool wear test method and test device, it is related to tool wear detection technical field, comprising the following steps: step S10: single-edge end mill model is established in three-dimensional modeling software, and end mill model is imported into finite element software;Step S20: the maximum temperature that can be generated when milling in end mill is analyzed, maximum temperature is determined;Step S30: point heat source device is heated to end mill's nose;Step S40: end mill tool wear experiment is carried out;Step S50: constantly repeat, and record end mill tool wear state, simultaneously replace test condition and carry out end mill tool test, and record end mill tool wear state;Step S60: compare the end mill tool wear state obtained from multiple conditions, establish acceleration model.The application is based on heat source method model, equivalent and simplified to get the temperature mode of end mill nose, and combined with actual test, obtain the maximum temperature suitable for not changing tool wear failure condition.

The application relates to the field of high-speed service areas, in particular to a management method and system for high-speed service area construction. The method comprises the following steps: acquiring a high-speed vehicle dynamic information set, analyzing the charging urgency index of each required charging vehicle according to the high-speed vehicle dynamic information set, and constructing a virtual priority charging queue; acquiring a construction site multi-dimensional heat source information set, analyzing the distribution of dynamic point heat sources and dynamic area heat sources based on the construction site multi-dimensional heat source information set, combining a real-time sunshine shadow map, and constructing a dynamic heat field optimization map; based on the virtual priority charging queue and the dynamic heat field optimization map, carrying out accurate pile position allocation, providing construction dynamic regulation and control suggestions, and generating a high-speed service area construction period charging scheduling report. In the high-speed service area construction process, the application ensures that the service area can still maintain efficient, stable and safe operation under complex construction environment.

The application provides an anisotropic heat-conducting flame-retardant cell spacer and a preparation method thereof. The cell spacer is a BNNS / kaolin composite cellulose-based cell spacer, which is formed by alternately stacking a plurality of BNNS layers and a plurality of kaolin nanolayers, and the heat-conducting flame-retardant cell spacer is regularly oriented along the horizontal direction, and has anisotropic heat conduction and double efficient flame-retardant characteristics. The material integrates anisotropic heat conduction, extreme point heat source stability and flame-retardant characteristics, and provides a feasible technical path for solving the thermal management bottleneck of high-safety demand lithium batteries.

The invention discloses a semiconductor quartz boat heating work vehicle which comprises a vehicle frame with a low gravity center. The adjustable hydrogen flame blast burner unit is arranged in the frame, and the hydrogen flame of the adjustable hydrogen flame blast burner unit faces the direction of a product to be heated; the graphite plate is horizontally laid above the frame, the product to be heated is located above the graphite plate, and the graphite plate is used for converting a point heat source of the adjustable hydrogen flame blast burner unit into a surface heat field so as to heat the product to be heated. Local high temperature of the blowtorch is actively adsorbed through the graphite plate and radiated to the whole area of the product, a discrete heat source is upgraded into a surface area soaking system, and the randomness of manual heating is eliminated. Meanwhile, the layout of the blowtorch can be dynamically adjusted according to the size of a product, so that the hydrogen flame of the blowtorch can be dynamically configured in position and angle according to the heating requirements of different areas of the product, and the self-adaptive temperature control of the quartz boat with a certain area is realized.

The invention discloses a suspended thermal management architecture for a high-speed optical transceiver and the optical transceiver, and belongs to the technical field of optical communication equipment. The framework comprises a shell, a PCB and a heat dissipation channel structure suspended between a main heat source assembly and the top of the shell. The heat dissipation channel structure is not directly and rigidly fixed, but forms a sandwich type stack through the first heat conduction interface layer and the second heat conduction interface layer, and heat of a point heat source is rapidly diffused in the horizontal direction and then is vertically transmitted to the shell. By optimizing a heat conduction path and adopting a functional gradient interface material, the diffusion thermal resistance and the interface thermal stress are effectively reduced, simulation shows that the total thermal resistance is reduced by 49%, the junction temperature of a key chip is reduced by about 20 DEG C, and the reliability of a 1.6 T high-speed optical module is remarkably improved.

This invention discloses a uniform heating system and method for aluminum ingots based on dynamic flame and control. It includes a furnace shell, with multiple support blocks spaced apart at the bottom of the furnace chamber within the shell. Baffles are mounted on the support blocks. Multiple heating zones are uniformly arranged at the top of the furnace shell, each with a flue gas outlet channel communicating with a baffle in its center. Circulation channels communicating with the baffles are asymmetrically arranged on both sides of the flue gas outlet channels, each containing a fan. Combustion channels communicating with the furnace chamber are symmetrically arranged on both sides of the flue gas outlet channels, each containing a burner. A sensor unit is located within the baffle. The sensor unit, burner, and fan are all electrically connected to a control unit. This invention transforms the traditional static point heat source or surface heat source flame into a dynamic volumetric heat source that can be periodically deflected and scanned on demand, achieving active flame coverage and temperature equalization of the upper and lower spaces of the furnace chamber.

The utility model relates to the field of loop heat pipes, in particular to a parallel type multi-evaporator loop heat pipe which comprises a plurality of evaporators, a condenser and a liquid storage device, capillary cores are arranged in the evaporators and divide the interiors of the evaporators into upper cavities and lower cavities, and a liquid pipeline comprises a liquid main pipeline and a plurality of liquid branch pipelines. According to the parallel type multi-evaporator loop heat pipe, when the number of heat sources changes, the number of the evaporators can be changed according to needs, and the steam pipelines and the liquid pipelines are designed to be of a detachable splicing structure, so that when the subsequent heat sources change, the length of the steam pipelines and the length of the liquid pipelines are not changed, and the number of the evaporators can be changed according to needs. And the length is correspondingly changed, so that the device can be suitable for being used in a multi-point heat source environment. And according to the evaporator loop heat pipe, the working medium phase change time of liquid is prolonged by changing the number of the filling strips blocking the water flow grooves, and the service life of the loop heat pipe is prolonged.

The invention provides an anisotropic heat-conducting flame-retardant battery cell spacer and a preparation method thereof, the battery cell spacer is a BNNS / kaolin composite cellulose-based battery cell spacer, is formed by alternately stacking a plurality of BNNS layers and a plurality of kaolin nano layers, and is a heat-conducting flame-retardant battery cell spacer regularly oriented in the horizontal direction, and the material has anisotropic heat conduction and dual efficient flame-retardant characteristics. The material integrates anisotropic heat conduction, extreme point heat source stability and flame retardant property, and provides a feasible technical path for solving the thermal management bottleneck of the lithium battery with high safety demand.

According to the X-ray tube composite anode target, the X-ray tube and the manufacturing method, the boron-doped diamond layer covering the anode target surface is arranged, atomic numbers of boron and carbon in the boron-doped diamond layer are small, the boron-doped diamond layer has high transmittance to electrons and X-rays, and the heat conductivity of the boron-doped diamond layer is far larger than that of the anode target surface, so that the X-ray tube composite anode target is more stable in performance. A point heat source generated when electron beams bombard the anode target surface can be rapidly evolved into a surface heat source, the heat density of a unit area is reduced, the conditions of corrosion, volatilization, cracking and the like of the anode target surface are prevented, the electron beam power is effectively improved, the continuous working time is effectively prolonged, the performance of an X-ray tube is improved, and the reliability and the service life of the anode target and the X-ray tube are improved; and the boron-doped diamond layer has good conductivity, part of electrons which do not penetrate through the boron-doped diamond layer can be guided away and released, and a charge accumulation effect cannot be formed on the surface of the boron-doped diamond layer, so that the situation that the stability of a focus becomes poor due to the fact that potential generated by the charge accumulation effect affects an electron beam track is avoided.