480results about How to "Lower working temperature" patented technology

The invention discloses an impact-resistant and distortion-resistant outdoor polyethylene power cable, and relates to the technical field of cables, the impact-resistant and distortion-resistant outdoor polyethylene power cable comprises a cable core, four annularly distributed wire cores are arranged in the cable core, each wire core is composed of an inner-layer conductor, an outer-layer conductor, a heat conduction enhancement layer, an inner enhancement layer and an inner insulation layer, a shielding combination layer is arranged outside a wrapping layer, and a shielding layer is arranged outside the wrapping layer. The shielding combination layer is composed of a high-conductivity metal thin film layer, a nanometer shielding layer and a protective coating, the anti-impact combination layer is arranged outside the shielding combination layer, the anti-impact combination layer is composed of an impact dispersion layer and an energy absorption layer, the anti-distortion combination layer is arranged outside the anti-impact combination layer, and the anti-distortion combination layer is composed of an impact dispersion layer and an energy absorption layer. The anti-distortion combination layer is composed of a core layer and an elastic buffer layer, an outer sheath is arranged outside the anti-distortion combination layer, and the outer sheath is composed of a reinforcing layer, a blocking layer and an outer protective layer, so that the problems that the power cable is poor in impact resistance and distortion resistance and inconvenient to maintain are solved.

The utility model discloses a two-phase liquid cooling heat dissipation system for servers, and the system is characterized in that a plurality of two-phase liquid cooling subsystems are matched with multiple layers of servers in a cabinet in a one-to-one correspondence manner; each two-phase liquid cooling subsystem comprises a liquid cooling plate, a condenser, an air pipe and a liquid pipe, the liquid cooling plate is horizontally attached to the server, the position of the condenser is higher than that of the liquid cooling plate, and the air pipe and the liquid pipe are both gravity type heat pipes and are connected between the liquid cooling plate and the condenser to form a refrigerant self-driven circulation loop; the multi-cold-source heat exchanger is used for cooling the condensers of the two-phase liquid cooling subsystems. The heat dissipation device is efficient in heat dissipation, reliable, safe, simple in system, low in cost, easy to maintain and suitable for heat dissipation of high-density server cabinets.

The invention discloses an electric reactor with internal coil stabilization and auxiliary heat dissipation, and relates to the technical field of coil stabilization, the electric reactor comprises a base, the top surface of the base is fixedly connected with an air-core electric reactor body, the outer surface of the air-core electric reactor body is provided with a coil body, and the top surface of the base is provided with a coil stabilization mechanism for preventing the coil from loosening. An auxiliary heat dissipation mechanism used for assisting heat dissipation of the reactor is arranged on the top face of the base, the coil stabilizing mechanism can clamp a loose coil, pressure can be applied more evenly through clamping and fixing, the coil is more stably fixed, the consistency of the shape and performance of the coil can be kept, and the service life of the reactor is prolonged. The clamping device can avoid direct compression and damage to an insulating layer of the coil, the insulating performance of the coil can be protected, the auxiliary heat dissipation mechanism can scrub the interior of the electric reactor, remove dust and sundries in the electric reactor, reduce heat resistance, improve heat dissipation efficiency and keep the electric reactor to operate within the normal working temperature range.

The invention discloses an HDI circuit board laser drilling device, and particularly relates to the technical field of HDI circuit board drilling, the HDI circuit board laser drilling device comprises an operation table, a rotating mechanism is rotatably connected to the right side of the middle of the upper end of the operation table, a transmission mechanism is rotatably connected to the front side of the upper end of the operation table, and a drilling mechanism is fixedly connected to the middle of the upper end of the operation table; an air blowing mechanism is arranged on the left side of the lower portion of the drilling mechanism. According to the HDI circuit board laser drilling device, in the descending process of the laser drilling head, a baffle is driven to be matched with a rectangular block, the HDI circuit board can be automatically and accurately positioned, the drilling precision and efficiency are improved, in the drilling process, a spray head is matched with a limiting pipe and a first sliding block, and therefore the HDI circuit board can be accurately drilled. According to the HDI circuit board drilling device, the surface of a drilled HDI circuit board is cleaned through the soft brush, chippings and dust generated in the drilling process can be removed, meanwhile, in the reset process of the laser drilling head, the surface of the drilled HDI circuit board is cleaned through the soft brush, the residual chippings and dust can be removed, and the cleanliness of the HDI circuit board is guaranteed.

The invention belongs to the technical field of material corrosion prevention, and particularly relates to a high-Si-content cold spraying Al-Mg-Si composite coating and a preparation method thereof. Spherical Al powder, Mg powder, Si powder and Al2O3 ceramic powder are used as raw materials, and the Al-Mg-Si composite coating is prepared on the pretreated base body through cold spraying. When the coating is prepared, the working temperature is low, the coating has the characteristic of solid deposition at low temperature, the heat influence on a matrix is small, oxidation, grain growth and phase change are avoided in the spraying process, and the residual tensile stress is low. The Al2O3 ceramic powder is added, so that the porosity of the coating can be reduced, and the tissue density is increased. And a proper amount of Si element is added, so that the protection effect of the coating is further enhanced, the corrosion rate inhibition capability of the coating is improved, and the mechanical property of the composite material is improved. And heat treatment is carried out at the selected annealing temperature, so that the performance of the coating can be enhanced, and the performance of the matrix is not influenced.

The invention relates to an Ag quantum dot-SnS2 composite nano gas-sensitive material, a preparation method thereof and application of the Ag quantum dot-SnS2 composite nano gas-sensitive material in a formamide sensor, and belongs to the technical field of semiconductor gas sensors. The micro-morphology of the Ag quantum dot-SnS2 composite nano gas sensitive material is that Ag quantum dots are loaded on the surface of SnS2, the SnS2 is of a flower-shaped structure assembled by SnS2 nanosheets with the thickness of 10-20 nm, and the crystal structure is a hexagonal phase crystal structure; the Ag quantum dots are nano-particles which are composed of Ag atoms and have the diameter of 5-15 nm. The sensor based on the Ag quantum dot-SnS2 nano composite material shows good gas-sensitive performance to formamide at the room temperature of 25 DEG C, has high sensitivity, good reproducibility, selectivity and long-term stability, solves the problem of high working temperature of a traditional metal oxide semiconductor gas sensor, and has good application prospects. The method has important significance in the aspects of industrial production, environment detection and the like.

The invention discloses an axial disc type permanent magnet motor phase change cooling method and structure. According to the cooling method, the rotation kinetic energy of the rotating shaft in the axial disc type permanent magnet motor is utilized, air flow is generated when the rotating shaft rotates, the air flow is introduced into the rotating shaft and cooled in the rotating shaft through the phase change material, and then the low-temperature air flow enters the air gap between the stator and the rotor, flows through the surface of the stator and the surface of the rotor along the air gap and then returns to the back face of the rotor to be discharged. According to the cooling structure, exhaust holes are formed in a shell of the axial disc type permanent magnet motor, an airflow channel is formed in the rotating shaft, the end, in the rotating shaft, of the airflow channel is communicated with the interior of the rotor, and phase-change materials are arranged in the airflow channel. On the basis of the internal structure of the motor, the temperature of air entering the motor is reduced through the characteristics of the phase change material, the cooling efficiency is improved, and the production cost and the maintenance cost are reduced.

The invention discloses a photo-thermal energy storage system, and relates to the technical field of photo-thermal energy storage, and the photo-thermal energy storage system is characterized in that a phase change substance is arranged in an energy storage box, a heat exchange flow path penetrates through the energy storage box and is in heat exchange cooperation with the phase change substance, a cooling device comprises a heat exchange shell and a water absorption gel plate, and a solar photovoltaic panel abuts against the heat exchange shell. A mounting cavity is defined by the heat exchange shell, the heat exchange shell is provided with a first wall part and a second wall part which are opposite, a mounting cavity outlet is formed in the first wall part, a mounting cavity inlet is formed in the second wall part, and the two ends of the heat exchange flow path are connected with the mounting cavity outlet and the mounting cavity inlet correspondingly to form a circulating flow path; the water absorption gel plate is arranged in the mounting cavity and abuts against the heat exchange shell, and a steam space is formed between the first wall part and the water absorption gel plate. The heat of the solar photovoltaic panel is absorbed through the water absorption gel plate, and the heat exchange flow path is matched with the phase change material in a heat exchange manner, so that the working efficiency of the solar photovoltaic panel and the solar energy utilization rate can be improved, and energy conservation and emission reduction are facilitated.

The invention relates to the technical field of electronic materials, and discloses a multi-layer shielding type insulating sheet, which comprises a shielding layer used for shielding electromagnetic interference and in direct contact with an insulating layer; the insulating layer is used for electric insulation and is tightly connected with the shielding layer and the heat dissipation layer; the heat dissipation layer is used for heat conduction and is arranged on the close side of the insulating layer and the buffer layer; the buffer layer is used for providing mechanical buffer and structural support and is attached to the heat dissipation layer and the surface coating; the surface coating is used for protecting the material surface and arranged on the outer surface of the buffer layer, and the shielding layer is made of one or more of copper foil, aluminum foil and a graphene coating. By adopting the copper foil, the aluminum foil or the graphene coating as the shielding layer, electromagnetic interference from the outside can be effectively shielded, in an experiment, the electromagnetic shielding effectiveness of the insulating sheet can reach 95 dB or above, the insulating sheet particularly shows excellent electromagnetic shielding performance in a high-temperature and high-vibration environment, and stable operation of an internal circuit and equipment is ensured.

The invention discloses a SnO2 modified WO3 nanosheet composite gas-sensitive material as well as a preparation method and application thereof, and belongs to the technical field of inorganic composite materials. The preparation method comprises the following steps: dissolving WCl6 in ethanol, adding into a reaction kettle provided with a ceramic tube, carrying out hydrothermal reaction at 170-190 DEG C for 5-8 hours, taking out the ceramic tube, drying, and annealing to obtain a ceramic tube loaded with WO3 nanosheets; the preparation method comprises the following steps: dissolving SnO2, tin chloride and urea in water to obtain a mixed solution, adding the mixed solution into a reaction kettle filled with a ceramic tube loaded with a WO3 nanosheet, carrying out a hydrothermal reaction at 90-100 DEG C for 1-4 hours, taking out the ceramic tube after the reaction is finished, and drying to obtain the SnO2 modified WO3 nanosheet composite gas sensitive material, and enabling the SnO2 modified WO3 nanosheet to grow on the ceramic tube in situ. The preparation method is simple, the product is high in crystallinity and good in stability and is suitable for preparing a gas sensitive sensor material with high economical efficiency, and a sensor prepared from the SnO2 modified WO3 nanosheet composite gas sensitive material can effectively improve the gas sensitive performance of WO3 and shows an extremely high response value to nitrogen dioxide at a low temperature.

The invention provides a flip light-emitting diode chip and a preparation method thereof, and the method comprises the steps: providing a substrate for growth, and sequentially depositing an N-type semiconductor layer, an active light-emitting layer and a P-type semiconductor layer on the substrate; preparing an N-type conductive through hole in the P-type semiconductor; preparing a current expansion layer on the P-type semiconductor layer and the N-type conductive through hole; preparing an isolation groove on the N-type conductive through hole and the current expansion layer; preparing a first semiconductor layer on the P-type semiconductor layer, the N-type conductive through hole, the current expansion layer and the isolation groove; preparing a third insulating layer on the first semiconductor layer; preparing a heat-conducting metal layer on the third insulating layer; preparing a fourth insulating layer on the heat-conducting metal layer; preparing a bonding pad layer on the fourth insulating layer; and the semi-finished product obtained after the step S9 is completed is welded to a support through the eutectic welding technology.

The invention discloses a high-power matrix lighting lamp, and relates to the technical field of lighting equipment. The device comprises a heat conduction copper plate, a driving pool, an extending heat dissipation pipeline, a plugged cooling fin, a bottom paddle, a top centrifugal stirring piece and other assemblies. Heat generated by the light-emitting matrix diode is transmitted to the cooling liquid in the driving pool through the heat conduction copper plate, the cooling liquid flows to the extending heat dissipation pipeline under the action of the driving centrifugal shifting piece, and the heat dissipation area is enlarged by additionally plugging the cooling fins. The rotating part of the device drives air circulation, the bottom blades and the auxiliary short blades enhance air cooling of the heat dissipation assembly, and the top centrifugal shifting piece promotes air flow of the top area. The purposes of efficient heat dissipation, energy conservation and environmental protection are achieved, and the LED lamp is suitable for various high-power LED lighting applications.

A breathing type dynamic adjustable solar photovoltaic and photo-thermal integrated curtain wall comprises a glass cover plate and a glass bottom plate which are arranged on the inner side of the front end face and the inner side of the rear end face of an installation frame respectively, and a photovoltaic assembly and a shutter device are arranged on the inner side of the glass cover plate and the inner side of the glass bottom plate respectively. The photovoltaic module and the shutter device form a ventilation cavity in the mounting frame, the ventilation cavity is communicated with a ventilation hole groove structure arranged on the mounting frame, and a gas driving device is arranged on the mounting frame in the ventilation cavity. The photovoltaic assembly comprises a light-transmitting photovoltaic panel and a transparent back plate, and the light-transmitting photovoltaic panel is arranged between the glass cover plate and the transparent back plate. The breathing-type dynamically-adjustable photovoltaic and photo-thermal integrated curtain wall module has the beneficial effects that the breathing-type dynamically-adjustable photovoltaic and photo-thermal integrated curtain wall module design is adopted, the two-stage ventilation groove holes are formed in the upper side and the lower side of the mounting frame, when the temperature of the photovoltaic panel is high, the vertical axial flow fan is started by the controller, and circulating air flow is formed in the ventilation cavity to take away heat.

The invention discloses an immersed liquid-cooled battery module, which relates to the field of thermal management of battery energy storage systems, and comprises a battery box body, and a battery and a nozzle device which are arranged in the box body, the battery array is arranged in the battery box body; the nozzle device comprises a nozzle main body; n nozzles are arranged on one side of the nozzle main body, and an inlet pipeline is arranged on the other side of the nozzle main body; the nozzle device is arranged on the inner side of the battery box body, a jet orifice of the nozzle faces a gap between two adjacent columns of batteries and is used for uniformly jetting cooling liquid into the surfaces of the batteries and the gaps of the batteries at the nozzle under the action of pressure difference, and the aperture of the nozzle is adjusted by the total flow of the gaps of the batteries and an inlet. According to the nozzle device for the immersed liquid cooling energy storage battery box, the spraying range of immersed cooling liquid can uniformly cover more battery modules, small flow resistance can be generated in the battery box, and the heat dissipation efficiency of an energy storage system is effectively enhanced.

The electromagnetic valve comprises a shell, a static iron core is arranged in the shell, a push rod shaft penetrates through a shaft hole of the static iron core, the front end of the push rod shaft is connected with a piston, the rear end of the push rod shaft is connected with a movable iron core, a reset spring is arranged on the push rod shaft in a sleeving mode and located between the static iron core and the movable iron core, a framework and a coil are arranged on the outer side of the movable iron core, and a sleeve is arranged on the inner side of the framework; the front end and the rear end of the shell are connected with the valve seat and the connector respectively, the glyd ring is arranged between the piston and the static iron core, and the guide ring is arranged between the push rod shaft and the static iron core. The Glyd ring and the guide ring are combined, so that sliding sealing performance, low friction resistance and guidance quality are achieved; a special-shaped sealing gasket is arranged on the piston, and high sealing performance is achieved through the brand-new sealing gasket design.

The invention discloses an automatic water-cooled power supply host system with independent partitions, and belongs to the technical field of power electronics, and the system is characterized in that the system comprises a host body, the host body is internally provided with a partition shelf, and the partition shelf is internally provided with a cavity. Each cavity is provided with an independent cooling coil, when a heating element corresponding to a certain cavity works to generate heat, a liquid pump sucks cooling liquid from an inlet pipe, the cooling liquid is accurately distributed through a flow dividing pipe and a flow control structure and then enters the cooling coil of the cavity, and by means of the independent cooling mode, when one cavity breaks down, the cooling liquid can be cooled by the liquid pump. The cooling liquid circulation is only influenced in the loop of the cavity, other cavities can still work normally, the reliability of the system is greatly improved, the overall downtime caused by local faults is shortened, and meanwhile, due to the design of the independent cavities, workers can quickly position fault points conveniently, and only the fault cavity is maintained and repaired.

The utility model discloses a frequency converter anti-interference device, which comprises a frequency converter and a box body, an anti-interference assembly is arranged on the box body, the anti-interference assembly comprises a metal net and a filter, a heat dissipation assembly is arranged at the top of the box body, the heat dissipation assembly comprises an air duct and a fan, a filter assembly is arranged at the bottom of the box body, and the filter assembly is arranged in the box body. The filter assembly comprises an inlet and a filter screen, a waterproof assembly is installed on the inner side of the inlet, and the waterproof assembly comprises a clamping plate and water-absorbent resin. The frequency converter anti-interference device can effectively conduct ventilation and heat dissipation work on a frequency converter, reduce the working temperature of the frequency converter and guarantee the working safety of the frequency converter; and when the scraper blade cannot completely clean dust on the filter screen, the filter screen is pushed by wind pressure, so that the filter screen compresses the spring and extrudes the button, and the button turns on the warning lamp to prompt personnel that the filter screen is blocked, and the anti-interference transmitter is suitable for improving the anti-interference performance of the transmitter.

The invention provides a copper-nickel alloy friction film based wind power gear oil additive composition and a preparation method thereof, belongs to the technical field of lubricating oil, and aims to solve the technical problems of low bearing capacity and poor antifriction effect of a friction film formed by wind power gear oil. The wind power gear lubricating oil comprises the following components in percentage by mass: 0.8%-1.4% of a sulfur-containing extreme pressure agent, 0.4%-1.0% of a phosphorus-containing anti-wear agent, 0.5%-1.5% of copper nanoparticles, 0.5%-1.0% of nickel acetylacetonate, 0.15%-0.25% of an antioxidant, 0.1%-0.20% of an anti-rust agent, 0.015%-0.025% of an anti-foaming agent, 0.04%-0.05% of a demulsifying agent, 0.4%-0.8% of a dispersing agent and 93.8%-97.1% of synthetic base oil, and the sum of the percentages of the components is 100%. Nickel acetylacetonate forms high-activity nickel ions under friction induction, the high-activity nickel ions react with a friction pair substrate to form an alloy interface layer, and meanwhile the alloy interface layer and copper nanoparticles form a high-strength copper-nickel alloy friction film through interface alloy.

The utility model discloses a power semiconductor module packaging structure which comprises a bottom plate, four corners of the bottom plate are fixedly connected with supporting rods, the top ends of the supporting rods are fixedly connected with a top plate, the upper surface of the bottom plate is fixedly connected with supporting legs, and the upper ends of the supporting legs are fixedly connected with a lower connecting plate. Two pneumatic push rods are fixedly connected to the lower surface of the top plate, the telescopic ends of the two pneumatic push rods are fixedly connected with an upper connecting plate, an upper mold and a lower mold are arranged between the upper connecting plate and the lower connecting plate, cooling grooves are formed in the upper mold and the lower mold, and the upper mold is fixedly connected with the lower surface of the upper connecting plate; the lower mold is fixedly connected with the upper surface of the lower connecting plate, the upper surface of the upper connecting plate and the lower surface of the lower connecting plate are both fixedly connected with heat dissipation mechanisms, the heat dissipation mechanisms are arranged to cool epoxy resin after epoxy resin injection molding is completed so that the epoxy resin can be cooled more rapidly, the working efficiency is improved, and meanwhile heat dissipation is rapid.

The invention provides a solid acid catalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: carbonizing lignin to obtain a carbon-based carrier; placing the carbon-based carrier in a plasma modification instrument, vacuumizing, and then introducing gas for activating treatment to obtain a lignin carbon-based material; and carrying out sulfonation treatment on the lignin carbon-based material to obtain the solid acid catalyst. The catalyst has the advantages of being short in preparation time, small in pollution, high in catalytic efficiency, recyclable and the like, can be applied to catalytic conversion of a fructose solution into 5-hydroxymethylfurfural, the yield can reach 70%-90%, corrosion of an inorganic acid catalyst to reaction kettle equipment is avoided due to use of the solid acid catalyst in the reaction process, and the catalyst is an environment-friendly catalyst.

The present invention discloses a radar automatic detection device for the liquid level height of a molten iron tank, comprising a radome composed of an outer wall and an inner wall, a cavity interlayer is arranged between the outer wall and the inner wall, the inner wall encloses an inner cavity, a radar level meter is arranged in the inner cavity; an air inlet pipe is arranged on the outer side of the radome, and the air outlet end of the air inlet pipe is connected with the cavity interlayer and the inner cavity. The radar automatic detection device for the liquid level height of a molten iron tank provided by the present invention adopts a radar level meter to measure the liquid level height of the molten iron in the molten iron tank. Compared with manual visual inspection, the radar level meter is safe and accurate in measuring the liquid level height; the radome structure with a double-layer hollow structure delivers high-pressure cold air through the air inlet pipe, and simultaneously and continuously blows and cools the inner cavity and the cavity interlayer of the radome, effectively reducing the working temperature around the radar and extending the service life of the radar level meter.

The invention discloses a light emitting device, a packaging method and an optical module. The light emitting device comprises a metal base, an insulating diversion layer, a pipe cap, a lens, a laser chip, a refrigerator assembly and an adapter assembly. The pipe cap is connected to the metal base in a covering mode to form a sealed cavity, and an insulating flow guide layer, a lens, a laser chip and a refrigerator assembly are arranged in the sealed cavity. The insulating diversion layer is connected between the metal base and the refrigerator assembly; a plurality of bismuth antimonide particles are sequentially connected to the upper surface of the insulating diversion layer; the cold surface substrate is connected to the upper surfaces of the bismuth antimonide particles; the upper surface of the cold face substrate is connected with a heat transfer conductive piece which is connected with the first substrate and the second substrate. The thermistor is arranged on the first substrate; the lens is arranged on the heat-transfer conductive part; the laser chip is arranged on the second substrate; the adapter assembly is connected to the outer side of the pipe cap. The heat dissipation efficiency is effectively improved, and the service life is prolonged.

The utility model provides a standard microwave power source which comprises a shell, the shell comprises a cover body and a bottom plate, and the cover body covers the bottom plate; the electronic element is arranged on one side of the bottom plate in the length direction of the bottom plate, and the heat absorption part is arranged above the electronic element, attached to the electronic element and used for absorbing heat of the electronic element; the cooling fan is arranged on the side, away from the electronic element, of the bottom plate and used for blowing away heat of the heat absorption piece. The standard microwave power source is attached to the upper portion of the electronic element through the heat absorption piece, heat generated by the electronic element can be effectively absorbed and prevented from being retained around the electronic element, the heat dissipation fan can rapidly take away the heat absorbed by the heat absorption piece, the working temperature of the electronic element is effectively reduced, and the service life of the electronic element is prolonged. The cooling fan and the electronic component are arranged at the two ends of the bottom plate respectively, the influence of noise of the cooling fan can be reduced, and the cooling efficiency and stability of the microwave power source are improved.

According to the ceramic particle surface treatment method and the metal-based ceramic composite material provided by the invention, the active substance powder is treated into uniform nano-scale powder, and the strong adsorption function of the nano-powder is utilized, so that the combination of the active substance powder and the ceramic particles in the cold spraying process is firmer, and the combination capacity of molten metal and the ceramic particles is improved. Besides, nano-scale active substance powder is uniformly deposited on the surfaces of ceramic particles by adopting a cold spraying technology, so that the wettability of ceramic and metal is improved, the bonding strength of the nano-scale active substance powder and the ceramic particles is high, infiltration of molten metal and the ceramic particles in the compounding process is facilitated, and the working temperature is lower; in addition, the binder is atomized on the surfaces of the ceramic particles in an atomization mode to manufacture the honeycomb-shaped ceramic prefabricated body, the binder is atomized more uniformly, the strength of the manufactured ceramic prefabricated body is higher, and the overall strength of the prepared metal-based ceramic composite material is improved.

The invention discloses an electronic device heat dissipation structure level set topological optimization method and system based on a physical information neural network, and the method comprises the steps: describing a heat exchange behavior between a radiator and a heat source through a heat conduction model, and determining a corresponding boundary condition through a specific heat conduction physical phenomenon; a topological optimization numerical model suitable for a heat dissipation structure is provided according to a level set method, a heat transfer control equation based on an interpolation material is obtained through methods such as interpolation of thermophysical properties of the material through a characteristic function of a level set, and target functions such as the minimum average temperature or the minimum average temperature variance are set, so that the heat transfer control equation of the heat dissipation structure is obtained. And deriving an adjoint equation and sensitivity of the heat transfer equation by adopting a continuous adjoint method, solving the heat transfer equation, the adjoint equation and the reaction diffusion level set equation through a physical information neural network, and further updating a level set function. By adopting the heat dissipation structure optimization method provided by the invention, the design freedom degree is higher, and the temperature of the heat dissipation area can be effectively reduced.

The present application relates to the technical field of motherboard structure, and discloses a motherboard and a server, including a board body and a first power module. Specifically, the board body is provided with a mounting portion for mounting a processor; the first power module is arranged in the mounting portion and overlaps with the mounting portion along a first direction, and the first power module is used to supply power to the processor, wherein the first direction is perpendicular to the board body. The motherboard and the server disclosed in the present application solve or improve the problem of a long power supply path between the processor and the power supply and low power supply efficiency.

The invention relates to the technical field of mainboard structures, and discloses a mainboard and a server, the mainboard comprises a board body and a first power supply module, specifically, the board body is provided with a mounting part for mounting a processor; the first power supply module is arranged in the mounting part and is overlapped with the mounting part along a first direction, the first power supply module is used for supplying power to the processor, and the first direction is perpendicular to the board body. According to the mainboard and the server disclosed by the invention, the problems of long power supply path between the processor and the power supply and low power supply efficiency are solved or improved.

The invention discloses a pure metal / high-entropy amorphous alloy nano multilayer film with a three-dimensional interface and a preparation method, and belongs to the field of metal surface modification.The nano multilayer film comprises crystal layers and amorphous layers which are alternately stacked, the crystal layers are of a single-phase face-centered cubic structure, crystal grains are columnar crystals growing in the deposition direction and penetrating through component layers, and the amorphous layers are of a single-phase face-centered cubic structure. The amorphous layer keeps a long-range disordered structure, and an interface between the crystal layer and the amorphous layer is of a three-dimensional structure; different from a two-dimensional sharp interface, a three-dimensional interface has certain strength, movement of dislocation in the area is subjected to stress, and then the current situation that dislocation completes slippage, namely annihilation, is changed. According to the preparation method, dislocation is orderly arranged near a three-dimensional interface, so that accumulation occurs, heterogeneous deformation stress is remarkably enhanced through long-range ordered dislocation arrangement, and the strength of the material is effectively improved.

The invention discloses a vehicle-mounted charger shell friction welding device and a welding method thereof, and relates to the technical field of resistance substrate detection.The vehicle-mounted charger shell friction welding device comprises a base, Y-axis displacement mechanisms are fixedly installed on the two sides of the upper end face of the base, and an X-axis displacement mechanism is installed between the two Y-axis displacement mechanisms; an X-axis displacement mechanism is installed on the upper portion of the base, a vertical displacement mechanism is installed below the X-axis displacement mechanism, a friction welding mechanism is arranged at the bottom of the vertical displacement mechanism, a shell clamping mechanism is arranged in the middle of the upper end of the base and comprises guide grooves, clamping plates are installed above the guide grooves correspondingly, and the clamping plates are arranged on the upper portions of the guide grooves correspondingly. And a transmission rod is installed in the guide groove, a threaded transmission pipe is installed outside the transmission rod, a sliding block is installed outside the threaded transmission pipe, and the problems that in a traditional welding mode, the welding speed cannot be increased on the premise that the flatness of the welding position is ensured, and the flexibility of a positioning mechanism is poor are solved.

The utility model relates to the technical field of optical module assemblies, in particular to an optical module assembly capable of independently dissipating heat. The optical module comprises an optical module body, the surface of the optical module body is fixedly connected with two L-shaped plates, the inner surfaces of the two L-shaped plates are slidably connected with heat conduction plates, clamping plates are slidably inserted in the L-shaped plates, the surfaces of the L-shaped plates are fixedly connected with fixing plates, limiting rods are slidably inserted in the fixing plates, and the limiting rods are fixedly connected with the clamping plates. One end of the limiting rod is fixedly connected with a stop block, a limiting groove is formed in the surface of the clamping plate, the arc face of the limiting rod is sleeved with a spring, and the two ends of the spring are fixedly connected with the stop block and the fixing plate respectively. The problem that the optical module assembly is damaged and cannot be used in some special environments due to the fact that the optical module assembly is overheated or insufficient in heat dissipation in some places with unsmooth air flow or much dust due to the fact that the application range of the optical module assembly is wide and the installation environment is complex is solved.