1043results about How to "Increase cooling area" patented technology

The invention discloses a low-smoke halogen-free cross-linked polyethylene insulated power cable, and relates to the technical field of power cables, the low-smoke halogen-free cross-linked polyethylene insulated power cable comprises a central conductor, the outer side of the central conductor is tightly coated with a rubber insulation sleeve, and the outer sides of a plurality of rubber insulation sleeves are jointly coated with a limiting silicon rubber sleeve; the outer side of the limiting silicon rubber sleeve is evenly coated with axial supporting inner rings at equal intervals, the outer rings of the axial supporting inner rings are tightly coated with axial protection outer rings, the outer sides of the axial protection outer rings and the filling soft rubber sleeve are jointly coated with an isolation protection rubber sleeve, and the outer ring of the isolation protection rubber sleeve is tightly coated with an installation outer rubber sleeve. According to the cable, the situation that rain and snow are attached to the outer side of the cable, and consequently the overall weight of the cable is increased is effectively prevented, the transverse traction force of the connecting position of the ends of the cable during working is reduced, the fatigue aging rate of the connecting position of the cable is reduced, and the actual service life of the cable is prolonged.

The invention relates to the technical field of filters, in particular to an internal shielding component of a power filter, which comprises a shell, a cover plate is mounted at the top of the shell through a cross recessed countersunk head screw, and a metal partition plate is arranged on one side of the inner wall of the shell; the wave-proof sleeve is welded on one side wall of the shell, and the material of the wave-proof sleeve is light nickel-plated copper fabric; when the power supply filter is used, the problem that crosstalk coupling is formed between interference signals can be prevented, the electromagnetic compatibility in the signal transmission process between systems is solved, the anti-wave sleeve is adopted for shielding power supply input of the power supply filter, interference of an input cable on other signals is greatly restrained, and the service life of the power supply filter is prolonged. The electromagnetic compatibility problem of the whole system caused by the fact that high-frequency noise is coupled to a power line is prevented, the shielding effectiveness is improved, the problem of filtering post-stage electromagnetic interference signals is greatly restrained, meanwhile, the heat dissipation area is increased, and the heat dissipation efficiency and effect are improved.

The invention relates to the technical field of electric control cabinets, and discloses an electric control cabinet and a using method and application thereof in crane construction, the electric control cabinet comprises a shell assembly, the shell assembly comprises a cabinet body and a mounting assembly arranged in the cabinet body, one side of the mounting assembly is provided with a heat dissipation adjusting assembly, and the heat dissipation adjusting assembly is arranged on the other side of the cabinet body. The installation assembly comprises a fixing frame, the fixing frame is connected with the inner wall of the cabinet body, damping springs are arranged at the four corners of the surface of the fixing frame, and an installation frame is arranged at the end, away from the damping springs, of the fixing frame. Through cooperation of the mounting assembly and the heat dissipation adjusting assembly, the interval between every two adjacent heat dissipation fins is adjusted in real time according to different temperatures of different positions, the ventilation quantity between an adjusting plate and a ventilation groove is adjusted, and therefore rapid heat dissipation is achieved, the vibration amplitude of the mounting frame is reduced when external wind power is too large, and normal operation of electrical elements is ensured.

The invention provides a multifunctional electric energy metering box, and relates to the technical field of electric energy metering boxes, the multifunctional electric energy metering box comprises an electric energy metering box, communication grooves are formed in two side walls of the electric energy metering box, first inner grooves are formed in the two communication grooves, and first heat dissipation openings and second heat dissipation openings are formed in two side walls of the electric energy metering box; the two second heat dissipation openings are located below the two first heat dissipation openings, an electric energy metering box door is hinged to the electric energy metering box, an observation window and a control panel are arranged on the electric energy metering box door, a containing groove is formed in the side wall of the electric energy metering box, a protective cover is fixedly installed on the side wall of the electric energy metering box, and the protective cover is located over the containing groove. The top of the inner wall of the electric energy metering box is fixedly provided with a fixed box body. The self-adaptive mechanism of the equipment reduces faults caused by overheating or moisture, reduces the maintenance cost, protects electrical elements, ensures the stable operation of the whole system, and improves the reliability and stability of the equipment.

The invention provides a bulk acoustic wave resonator, a filter and a manufacturing method thereof. The bulk acoustic wave resonator comprises a bulk acoustic wave resonator carrier with a first resonant cavity, a first electrode layer, a piezoelectric layer, a second electrode layer and a bulk acoustic wave resonator cover body with a second resonant cavity and a heat dissipation layer, the heat dissipation layer is provided with at least one protrusion. The second electrode layer covers a first area of the first surface of the piezoelectric layer, and the first area is the surface, close to one side of the bulk acoustic resonator cover body, of the piezoelectric layer; the first electrode layer covers a second area of the second surface of the piezoelectric layer, and the second area is the surface, close to one side of the bulk acoustic resonator carrier, of the piezoelectric layer; the orthographic projection of the second area on the bulk acoustic wave resonator carrier is at least partially overlapped with the orthographic projection of the first area on the bulk acoustic wave resonator carrier. The heat dissipation layer with a special structure is arranged at a proper position, so that the heat dissipation area can be increased, the heat dissipation efficiency is improved, and the problems of poor heat dissipation effect, poor performance and the like of the bulk acoustic wave resonator are solved.

The invention relates to the technical field of enameled wire cooling, in particular to an enameled wire cooling device for enameled wire production. The water cooling device comprises a water cooling box, cooling liquid is contained in the water cooling box, at least two sets of conveying assemblies are arranged in the water cooling box, each conveying assembly comprises a rotating motor arranged on the side wall of the water cooling box, the output end of each rotating motor penetrates through the water cooling box, a transmission roller is arranged at the end of each rotating motor, a limiting roller is arranged above each transmission roller, and an adjusting assembly is arranged above each limiting roller; varnished wires pass through the through holes formed in the sponge mat and are adsorbed by the sponge mat through water on the surface of the through holes, so that the varnished wires are automatically dried, when much water is adsorbed in the sponge mat, the telescopic rods are shrunk by pressing the pressing plates, and the compression springs are compressed in the shrunk process of the telescopic rods; and water adsorbed in the sponge pad overflows under the extrusion force of the pressing plate, so that the cooled enameled wire is quickly dried and dehumidified.

The invention discloses a method for improving the cooling effect of a pole winding based on a mixed-flow fan, and belongs to the technical field of cooling of high-rotating-speed and high-capacity hydraulic generators and pumped storage generator motors. Mixed-flow fans are arranged at the two ends of a magnetic yoke, and cooling air is divided into radial cooling air for cooling coils at the ends of the magnetic poles and axial cooling air entering the outer surfaces between the magnetic poles. An interelectrode outer surface ventilation cooling space is formed between every two adjacent pole windings, interelectrode ventilation partition plates which are axially arranged are arranged in the interelectrode outer surface ventilation cooling spaces, and separated axial ventilation air channels are formed by the interelectrode ventilation partition plates and the outer surfaces of the pole windings; therefore, rotor pole winding cooling of a high-rotating-speed and high-capacity hydro-generator and a pumped storage generator motor in which radial ventilation cooling cannot be adopted in a pole winding interelectrode area is ensured, and the problem that the difference between the cooling effects of the windward side and the leeward side of a traditional structure is large is solved.

The invention provides a motor end cover and an industrial motor, the motor end cover comprises an end cover body and a fan housing, the end cover body is provided with an inner side surface used for being assembled with a non-driving end of the motor and an outer side surface located at the outer side of the inner side surface, the outer side face comprises a fan blade assembly face located in the center area of the outer side face and an air guide ring face located in the edge area of the outer side face and arranged around the fan blade assembly face, the fan housing is arranged around the radial outer side of the end cover body, and an air outlet channel of the centrifugal fan blade is formed between the fan housing and the air guide ring face. A plurality of partition pieces are arranged between the fan housing and the air guide ring face and divide the air outlet channel into a plurality of cooling channels, and the cooling channels extend in the axial direction of the end cover body. According to the invention, air flow guide can be formed before the air outlet flow of the centrifugal fan blades enters the heat dissipation flow channels among the heat dissipation fins of the subsequent motor shell, so that the initial air speed value of the cooling air flow entering the heat dissipation flow channels of the motor shell is effectively increased, and the heat dissipation effect is enhanced.

The invention provides a preparation method of a beryllium-copper alloy material with high beryllium content, which comprises the following steps of: preparing metal raw materials containing pure copper and beryllium-copper master alloy, smelting to obtain alloy liquid, casting the alloy liquid to obtain a cast ingot, homogenizing the cast ingot to obtain a homogenized casting blank, and hot-rolling the homogenized casting blank to obtain a hot-rolled blank, the preparation method comprises the following steps: carrying out hot rolling on an alloy strip, carrying out hot rolling on the alloy strip to obtain a hot-rolled blank, carrying out annealing treatment on the hot-rolled blank to obtain an annealed blank, carrying out a circulating cold rolling-intermediate annealing process on the annealed blank, and finally carrying out finish rolling and finished product annealing treatment on the alloy strip to prepare the high-beryllium-content beryllium-copper alloy material. And machining passes are many.

The invention discloses a hydrogen fuel cell unmanned aerial vehicle with a liquid cooling heat dissipation structure. The hydrogen fuel cell unmanned aerial vehicle comprises an unmanned aerial vehicle body, a hydrogen fuel cell system, a heat dissipation vehicle arm with an inner cavity, a liquid distribution header pipe, a first water pump, a liquid guide downstream pipe, a liquid guide backflow pipe, a propeller, a flow uniformizing mechanism and a liquid collection header pipe. Cooling liquid absorbing heat is evenly distributed to each liquid distribution branch pipe through the liquid distribution header pipe and the flow uniformizing mechanism and then flows into the liquid guide downstream pipe and the liquid guide backflow pipe in the heat dissipation machine arm for heat dissipation, rotor wing wind of a propeller is fully utilized for heat convection heat dissipation, and then the cooling liquid is circulated into a hydrogen fuel cell system through the liquid collection header pipe. Water-cooling heat dissipation is adopted in the whole process, meanwhile, a water-cooling heat dissipation device is combined with the unmanned aerial vehicle frame, the vehicle arms of the unmanned aerial vehicle frame serve as heat dissipation devices, an additional heat dissipation device structure can be omitted, the weight can be reduced, rotor wing wind is fully utilized for heat convection, heat dissipation fan components can be omitted, the weight is reduced, and therefore the heat dissipation effect is guaranteed, and meanwhile the heat dissipation efficiency is improved. And the weight is reduced.

The invention discloses an aluminum alloy large-gap MIG welding method which comprises the following steps: firstly, determining the thickness position and the welding direction of a fillet weld of a to-be-welded workpiece, determining welding current according to the thickness of the to-be-welded workpiece, and continuously heating a molten pool by adopting a delay staying method in an arcing stage; s2, in the welding stage, switches of the robot and the MIG welding machine are turned on, and a MIG welding gun walking path program carried by the welding robot is compiled; an MIG welding gun carried by the robot swings in a Z shape and swings back and forth, a double-pulse scheme is adopted in the welding process specification, according to the welding current scheme, the welding current is determined according to the thickness of the aluminum alloy, the welding parameter of welding swing in the forward direction is small current, and the welding parameter of welding swing in the backward direction is large current; and after swinging of the welding gun is finished, the welding gun continuously moves for a certain distance, and the welding gun moves to a welding end point. Effective welding can be achieved under the working conditions of different thicknesses and large gaps, and the welding quality is improved.

The invention discloses a K-band amplitude-limiting low-noise amplifier, and belongs to the technical field of radio frequency microelectronics. The circuit comprises an input matching module, a diode amplitude limiting module, an inter-stage matching module, a low-noise amplification module and an output matching module which are cascaded in sequence, the input matching module is used for realizing impedance matching between a radio frequency signal input end and the diode amplitude limiting module and transmitting a radio frequency signal; the diode amplitude limiting module is used for limiting the amplitude of the radio frequency signal and transmitting the radio frequency signal; the inter-stage matching module is used for realizing impedance matching between the diode amplitude limiting module and the low-noise amplification module; the low-noise amplification module is used for carrying out amplification processing on the radio frequency signal after amplitude limiting and transmitting the radio frequency signal; and the output matching module is used for realizing impedance matching between the low-noise amplification module and the radio frequency signal output end and outputting the amplified radio frequency signal. According to the invention, the amplitude of the input signal can be limited, so that the amplitude is kept in a bearable range of the low-noise amplification circuit, and the stability and reliability of the whole system are ensured.

The present invention provides a chip heat dissipation packaging structure and a preparation method of the chip heat dissipation packaging structure, which relates to the field of chip packaging technology. The chip heat dissipation packaging structure includes a substrate, a packaged chip, a heat conductive material layer and a first heat dissipation cover, wherein the packaged chip is mounted on the substrate; the heat conductive material layer is arranged on the side of the packaged chip away from the substrate; the first heat dissipation cover is arranged on the substrate and covers the outside of the packaged chip, and the first heat dissipation cover is at least partially located on the side of the heat conductive material layer away from the substrate; wherein a plurality of first heat dissipation bumps are arranged on the side of the first heat dissipation cover close to the substrate, and the plurality of first heat dissipation bumps are all connected to the surface of the side of the packaged chip away from the substrate, and the heat conductive material layer is connected to the first heat dissipation cover. Compared with the prior art, the present invention can greatly increase the heat dissipation area by adding the first heat dissipation bump and combining the design of the heat conductive material layer, without expanding the design size of the first heat dissipation cover, and avoiding the problem of warping of the substrate or chip caused by thermal stress.

The invention relates to a QSFP-DD packaging 400G optical module structure, and belongs to the technical field of optical modules. Comprising a module upper cover, a module base and a pull ring, the module upper cover and the module base form a containing cavity, an MPO optical fiber adapter and a module circuit board assembly are arranged in the containing cavity, and first cooling fins and second cooling fins are arranged on the module upper cover and the module base respectively; the module circuit board assembly comprises a PCB, a heat dissipation block is arranged on the PCB, and a heat dissipation table is arranged on the module upper cover. A module upper cover and a rubber coating area are arranged on the inner side of the pull ring, a pull ring handle is arranged at one end of the pull ring, and the pull ring handle is flush with the bottom of the module base. According to the QSFP-DD packaging 400G optical module structure provided by the invention, the heat dissipation efficiency is remarkably improved, the MPO jumper wire insertion space is optimized, more internal space of the PCB is provided, the signal loss is reduced, the connection stability of the light-transmitting assembly and the silicon optical assembly is enhanced, and the optical signal loss is reduced.

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.

The utility model provides a battery liquid cooling module which comprises a battery module, a battery module fixing frame and a liquid cooling assembly, liquid cooling plates are respectively arranged on two opposite sides of the battery module fixing frame, and the liquid cooling plates are communicated through liquid cooling pipes to form a loop, so that circulating liquid takes away heat generated by the battery module; and the safety of the battery module is improved. The elastic insulating heat conduction pad is arranged between the liquid cooling plate and the battery module fixing frame, and the liquid cooling pipe is arranged to be the corrugated pipe with the expansion joint, so that the flowing stroke of liquid can be increased, the heat dissipation effect is improved, the corrugated pipe can absorb deformation and displacement caused by thermal expansion and cold contraction or mechanical vibration in a pipeline system, and the heat dissipation efficiency is improved. The compensation effect is achieved; by arranging the telescopic joints and the corrugated pipes, the length can be adjusted, the installation size error of the liquid cooling plates on the two sides and the distance change between the liquid cooling plates can be made up, the anti-loosening and cushioning effects are achieved, and liquid leakage caused by loosening of the clamping parts in the using process is effectively avoided.

The invention discloses a relay which comprises a contact assembly and an arc extinguishing assembly. The contact assembly comprises two contact parts, one contact part is provided with a first static contact and a first leading-out piece, the first static contact is arranged on the first leading-out piece, and the other contact part is provided with a first movable contact used for making contact with or being separated from the first static contact. The arc extinguishing assembly comprises a magnetic conductive piece and a permanent magnet, the magnetic conductive piece is connected with the first leading-out piece, and the permanent magnet is arranged on the side, facing the first movable contact and the first static contact, of the magnetic conductive piece, located around the first movable contact and the first static contact and used for extinguishing electric arcs generated between the first movable contact and the first static contact.

The invention discloses an explosion-proof motor for an underground coal mine, and relates to the technical field of explosion-proof motors, and the explosion-proof motor comprises a housing, the outer wall of the housing is fixedly connected with a plurality of short fins at equal intervals, the inner wall of the housing is fixedly connected with a stator around the circumference, and the inner wall of the center of the housing is rotatably connected with a rotating shaft. Through vertical separation of the flow guide plate and flow guide of concave arc faces on the two sides, the resistance of hot air shunting to the two sides can be reduced, after the hot air enters the ventilation cavity, the heat dissipation area is increased under the flat arrangement of the hot air, and heat on the surface of the ventilation cavity is rapidly guided out through cooperation of the unfolded first fins, the unfolded second fins and the unfolded third fins, so that the heat dissipation efficiency is improved. The temperature exchange rate can be increased through double heat conduction, hot air in the ventilation cavity can be rapidly cooled, airflow and temperature on the two sides can be balanced, the stability of the system is improved, the equipment temperature can be reduced through good heat dissipation, and electric sparks caused by overheating are reduced.

The invention relates to an electric heating device, in particular to a spiral disc electric heating device, which comprises a first electrode, a second electrode and a plurality of electric heating sheet groups, the plurality of electric heating sheet groups are sequentially arranged to form a certain length, the positions of the plurality of electric heating sheet groups are fixed, and the structures of the plurality of electric heating sheet groups are the same. Each electric heating piece set comprises a plurality of layers of electric heating pieces which are concentrically arranged, an annular containing space is formed between every two adjacent layers of electric heating pieces and used for containing a medium to be heated, and the different electric heating piece sets are connected in series or in parallel. One end of the first electrode is connected with the electric heating sheet group at the head, the other end is connected with a power supply anode, one end of the second electrode is connected with the electric heating sheet group at the tail, and the other end is connected with a power supply cathode. The large electric heating power can be achieved in the limited volume space, and the power density of the electric heating device is improved.

The utility model relates to a transverse fan air curtain system and an agricultural sprayer, the air curtain system comprises two air curtain units, each air curtain unit comprises an air bag and a bottom groove, the two air bags are horizontally and oppositely distributed, can horizontally rotate and be positioned, and can rotate to the same straight line for operation or rotate to be distributed side by side for storage; the two bottom grooves are fixedly installed at the bottoms of the two air bags correspondingly and are parallel to the two air bags correspondingly, and a plurality of air outlets communicating with the corresponding air bags are evenly formed in the two bottom grooves at intervals correspondingly. And a transverse fan is fixedly mounted at the end part of at least one end of each air bag. The spraying machine has the advantages of being simple in structure, reasonable in design and capable of reducing drifting of pesticide sprayed by the spraying machine, saving 25%-30% of pesticide, enhancing penetrability of the pesticide, enabling the pesticide to be better attached to crops, improving working efficiency and guaranteeing the spraying effect. In addition, the fan is transversely arranged at the end of the air bag, and assembling is convenient.

The invention discloses a radiator with microneedle columns. The radiator comprises at least one heat conducting plate and a plurality of microneedle columns, the heat conducting plate has a first surface and a second surface opposite to each other. The first surface of the heat-conducting plate is connected with the plurality of microneedle columns, and the second surface of the heat-conducting plate is used for being connected with a heat source. A small grain normal area and a plurality of large grain heat conduction channels located in the small grain normal area are formed on the heat conduction plate, and each large grain heat conduction channel is formed from the second surface of the heat conduction plate to the first surface of the heat conduction plate and is connected with each corresponding microneedle column. According to the radiator, the large-grain heat conduction channel is arranged on the heat conduction plate and connected with the microneedle columns, the large-grain heat conduction channel has a better heat conduction effect compared with a small-grain normal area, and the microneedle columns are low in heat conduction resistance and can provide a larger heat dissipation area for heat dissipation, so that heat of a heat source can be rapidly taken away, and a better heat dissipation effect is achieved.

The utility model discloses a combined type engine cylinder block convenient to cool, which comprises an engine cylinder block body, a piston groove arranged in the middle of the engine cylinder block body, an engine cylinder cover arranged at the upper end of the engine cylinder block body in an attached mode and a cooling pipe, and the cooling pipe is installed in a connecting groove in a clamping mode. And cooling liquid is arranged in the cooling pipe, the mounting mechanisms are symmetrically arranged on the left side and the right side of the engine cylinder cover, and the mounting mechanisms are used for limiting the position between the engine cylinder cover and the engine cylinder block body. According to the combined type engine cylinder block convenient to cool, cooling liquid is introduced into the engine cylinder block body, so that heat in the engine cylinder block body can be taken out, the heat dissipation and cooling effects are achieved, the cooling pipes are bent, the actual heat dissipation area is increased, the heat dissipation efficiency is improved, and through the arrangement of the mounting mechanism, the positioning rod and the mounting cap, the cooling effect is improved. And the engine cylinder block body can be conveniently disassembled, maintained and overhauled.

The utility model discloses an engine piston which comprises an inner cooling oil channel, the inner cooling oil channel is annularly arranged in the engine piston, the inner cooling oil channel comprises a bottom wall, and the bottom wall is arranged on the side, close to a pin hole, of the inner cooling oil channel; the top wall is arranged on the side, away from the pin hole, of the inner cooling oil duct, and the top wall and the bottom wall are oppositely arranged; the two side walls are connected between the bottom wall and the top wall, one side wall comprises a plurality of first arc sections and a plurality of second arc sections, the first arc sections are circular arcs protruding towards the outside of the inner cooling oil channel, the second arc sections are circular arcs recessed towards the inside of the inner cooling oil channel, and the first arc sections and the second arc sections are sequentially arranged in a staggered mode. The multiple first arc sections and the multiple second arc sections are sequentially arranged in the height direction in a staggered mode, the heat dissipation area of the inner cooling oil channel and cooling oil is increased, wave vibration can be generated when the cooling oil flows in the inner cooling oil channel, and the cooling efficiency of the cooling oil is improved.

The utility model relates to the field of signal acquisition, in particular to a signal acquisition structure with a signal shielding protection structure. The technical problem is that in the process of collecting weak signals, a conductive material is used for wrapping a signal collector to form a Faraday cage effect, so that a method for blocking external electromagnetic interference may cause certain influence on target signals, and thus the collection result may be slightly influenced. According to the technical scheme, the signal acquisition structure with the signal shielding protection structure comprises a heat dissipation assembly, a heat conduction assembly and an anti-interference assembly. By arranging the adjustable shielding device and the built-in heat dissipation system, the equipment can flexibly adjust the contact area between the signal receiving assembly and the outside, so that the acquisition effect is prevented from being influenced by insufficient target signal strength, and meanwhile, the built-in heat dissipation system can reduce the internal temperature of the equipment in real time, so that the acquisition efficiency is improved. Efficient operation in the signal acquisition process is ensured, and performance reduction caused by overheating is prevented.

The invention relates to the technical field of motors, in particular to a motor utilizing heat radiation for heat dissipation, which comprises a motor winding and a rotor, two ends of the rotor are respectively connected with an output shaft and a connecting shaft, the motor winding is provided with a first heat conduction disc, and the output shaft is provided with a second heat conduction disc. The first heat conduction disc and the second heat conduction disc can rotate relative to each other; a plurality of first heat conduction rings and a plurality of second heat conduction rings are arranged on the opposite sides of the first heat conduction disc and the second heat conduction disc correspondingly, and the first heat conduction rings and the second heat conduction rings are arranged in a concentric circle spaced and staggered mode. Through the first heat conduction disc and the second heat conduction disc which are oppositely arranged, the overall heat dissipation area can be increased, the heat dissipation effect is improved, in addition, the first heat conduction disc is fixedly arranged on the motor winding, the second heat conduction disc is arranged on the output shaft, and when the second heat conduction disc rotates, fan blades can be driven to rotate to blow air to flow for heat dissipation.

The utility model relates to an air-cooled plug-in box capable of improving an electromagnetic shielding effect, and solves the problems that an existing plug-in box adopts an air-cooled heat dissipation mode, dust is easy to accumulate in the plug-in box after long-time operation, the overall electromagnetic shielding effect of the plug-in box is reduced, and the space for installing a functional module in the plug-in box is extruded. The heat dissipation device comprises a box body and heat dissipation plates arranged in the box body, the heat dissipation plates comprise an upper heat dissipation plate and a lower heat dissipation plate, gaps exist between the upper heat dissipation plate and an upper cover plate and between the lower heat dissipation plate and a lower cover plate respectively, the gaps form a first heat dissipation channel and a second heat dissipation channel, the right end face of the upper heat dissipation plate and the right end face of the lower heat dissipation plate are connected with a right panel, and gaps exist between the right panel and the upper cover plate and between the right panel and the lower cover plate. The air guide part is arranged relative to the fan on the left panel and guides cold air into the two heat dissipation channels, the inner side face of the air guide part is connected with the left end face of the upper heat dissipation plate and the left end face of the lower heat dissipation plate, the multiple slot plates are arranged between the upper heat dissipation plate and the lower heat dissipation plate, and a groove between a first installation plate and a second installation plate of the air guide part can be used for installing a 3U module.

The invention relates to the technical field of liquid cooling of inner rotor motors, and discloses a liquid-cooled inner rotor motor driven by a gearbox, the liquid-cooled inner rotor motor comprises a gearbox and an inner rotor motor, the inner rotor motor is installed on the gearbox, the gearbox is composed of a left shell and a right shell, cooling liquid is stored in the gearbox and the inner rotor motor, and the left shell and the right shell are communicated with each other. According to the invention, the cooling liquid is injected into the inner rotor motor and the gearbox, and the cooling liquid circularly flows in the inner rotor motor and the gearbox under the cooperation of the liquid cooling driving assembly, so that a rotor in the inner rotor motor can be cooled more efficiently; in addition, the liquid cooling driving assembly provides power for the cooling liquid through the rotation motion of mutual meshing of internal gears and the gravity difference between the high position and the low position when the whole vehicle runs, cost and risk increase caused by an oil pump and an additional newly-added circuit are removed, and process installation and implementation are convenient and fast.

The utility model relates to the field of flattening devices, in particular to a PVDC (Polyvinyl Dichloride) composite hard sheet flattening device. The utility model provides a PVDC (Polyvinyl Dichloride) composite hard sheet flattening device which can improve the flattening effect on a PVDC composite hard sheet, increase the cooling area on the PVDC composite hard sheet and improve the cooling efficiency. A PVDC composite hard sheet flattening device comprises a bottom frame, a motor, a first pressing wheel, a second pressing wheel and the like, the upper side of the right portion of the bottom frame is connected with the motor, the lower portion of the bottom frame is rotatably connected with the first pressing wheel, an output shaft of the motor is connected with the first pressing wheel, and the middle of the bottom frame is rotatably and slidably connected with the second pressing wheel. According to the PVDC composite hard sheet flattening device, cooling water is introduced into the water pipe, then the second automatic lifting machine is started, the upper pressing plate moves downwards to be matched with the lower pressing plate, and the PVDC composite hard sheet is pressed, so that the effects that the flattening effect on the PVDC composite hard sheet can be improved, the cooling area on the PVDC composite hard sheet is increased, and the cooling efficiency is improved are achieved.

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.