464results about How to "Low calorific value" patented technology

The rotary cross-flow ceramic membrane filtering device comprises a shell, a main shaft unit arranged in the shell and a power unit for driving the main shaft unit to rotate, the power unit provides rotating power for the main shaft unit and drives the filtering disc to rotate, the main shaft unit is installed in the shell and executes a specific filtering task, and the shell provides necessary support and protection for the main shaft unit and the power unit and controls inflow and outflow of materials. According to the rotary cross-flow ceramic membrane filtering device provided by the invention, the ceramic membrane filtering disc is arranged, so that the filtering efficiency and the system stability are improved, the operation cost is reduced, and the rotary cross-flow ceramic membrane filtering device is suitable for being widely applied to various industrial fields needing efficient filtering solutions.

The invention provides an ammonia / kerosene dual-fuel precooling engine and a fuel cell power generation system, and belongs to the technical field of aviation systems. The problems of poor variable working condition performance of an engine, difficulty in matching of a gas compressor and a turbine, low working efficiency, fuel waste and the like due to the fact that working of the gas compressor is limited by overhigh total temperature of flying incoming flow air under the high Mach number of an aircraft are solved. According to the invention, the electric energy generated by the solid oxide fuel cell system is supplied to the aircraft load and the motor, and the motor drives the secondary gas compressor to do work in a manner of coaxial installation with the secondary gas compressor, so that the previous single-pole compression is changed into multi-stage compression. A dual-fuel pre-cooling propulsion method is adopted, liquid ammonia and aviation kerosene are selected as dual fuels of the system, the heat sink requirement for incoming flow air pre-cooling can be met, the fuel heat value requirement needed when the aircraft flies at the high Mach number can also be met, and therefore stable and safe flight of the aircraft at the hypersonic speed becomes possible.

The invention discloses a TPMS structure-based phase change liquid cooling coupling battery thermal management device, and relates to the technical field of battery thermal management, the TPMS structure-based phase change liquid cooling coupling battery thermal management device comprises a plurality of battery packs, a battery box body, a first liquid cooling pipeline, a second liquid cooling pipeline and a plurality of cooling plates; the battery packs and the cooling plates are sequentially arranged in the battery box body at intervals; the cooling plate comprises a plate core and a shell, the plate core of a three-period minimum curved surface structure is arranged in the shell, and a liquid cooling area and a phase change cooling area which are isolated from each other are defined by the plate core and the shell. The liquid cooling area is communicated with a liquid cooling inlet and a liquid cooling outlet of the shell to form a liquid cooling channel, and is communicated with an external liquid cooling circulating device through a first liquid cooling pipeline and a second liquid cooling pipeline to realize liquid cooling; and a phase-change material is injected into the phase-change cooling area to realize phase-change cooling. According to the invention, the plate core with a small specific surface area and a three-period extremely-small curved surface structure is adopted to manufacture the cooling plate, so that effective coupling of liquid cooling and phase change cooling is realized, and high heat exchange efficiency and good temperature uniformity can be realized.

The invention discloses an induction motor, a compressor and refrigeration equipment, and relates to the technical field of motors, the induction motor comprises a stator component and a rotor component; the stator component comprises a stator core, the stator core comprises a stator punching sheet, the stator punching sheet comprises a stator yoke and a plurality of stator teeth which are arranged on the inner side of the stator yoke and are arranged at intervals in the circumferential direction of the stator yoke, and every two adjacent stator teeth form a stator groove; the rotor component is arranged on the inner side of the stator component, the rotor component comprises a rotor core, the rotor core comprises a rotor punching sheet, and the rotor punching sheet is provided with a plurality of rotor grooves which are arranged at intervals along the circumferential direction of the rotor punching sheet; wherein the groove height of the rotor groove is # imgabs 0 #, the radius of the rotor punching sheet is # imgabs 1 #, and the groove height of the stator groove is # imgabs 2 #; the thickness of the stator yoke is # imgabs 3 #, and the distance from the bottom of the rotor slot to the center of the inner circle of the rotor punching sheet is # imgabs 4 #; and the formula is as follows: 1.65 # imgabs 5 # 3.3. According to the induction motor, the efficiency of the induction motor can be improved.

The present invention discloses an integrated device of a motor and a planetary reducer and a manufacturing method thereof, and the technical scheme thereof includes: a casing, a motor assembly and a planetary reducer assembly, the casing is provided with mounting cavities for the motor assembly and the planetary reducer assembly respectively, the motor assembly and the planetary reducer assembly are matched in transmission, and a cooling structure is provided on the outer circle of the casing. The manufacturing method mainly processes the casing, the stator core is installed on the casing, the rear end cover of the motor is fixed on the casing, the rotor of the motor is first installed on the front end cover inside the motor, and then pressed into the stator, the sun gear of the planetary reducer is installed on the motor shaft, and the gear lubricating oil is added through the planetary gear oil filling port on the casing, and the coolant needs to be introduced into the casing during operation. The entire technical scheme has a compact structure, simple transmission, and convenient maintenance, and the system efficiency, rotation accuracy, position accuracy and service life are greatly improved, and the heat generation and operating noise are greatly reduced.

The utility model discloses a multi-gear constant-speed regulating circuit for a low-voltage brushless motor of an electric hair cutter. The multi-gear constant-speed regulating circuit comprises a main control circuit, a power supply circuit, a voltage detection circuit, an inverter circuit and a back electromotive force detection circuit, the output end of the power supply circuit is connected with the voltage detection circuit, the output end of the voltage detection circuit is connected with the master control circuit, the inverter circuit is connected with the output end of the master control circuit, the output end of the inverter circuit is connected with the driving device, the driving device is connected with the back electromotive force detection circuit, and the output end of the back electromotive force detection circuit is connected with the master control circuit. By the adoption of the design, the square wave output duty ratio is adjusted according to different input power supply voltages, the multi-gear constant speed function is achieved, different rotating speeds are adjusted according to different use requirements, the use smoothness of a product is improved, the rotating speed is stable, the working efficiency and the use experience are improved, the heating value of the product is reduced, the service life is prolonged, and the structure is simple and convenient to use. The cost is low, and the market reference prospect is relatively great.

The invention discloses a high-magnification and high-capacity resin-based hard carbon material as well as a preparation method and application thereof, and belongs to the technical field of hard carbon materials. The preparation method comprises the following steps: dispersing carbon nanotubes in resin or a resin precursor to obtain carbon nanotube resin; and carbonizing the carbon nanotube resin to obtain the high-magnification and high-capacity resin-based hard carbon material. The carbon nanotubes are added into the resin, so that the conductivity and the structural stability of the high-rate and high-capacity resin-based hard carbon material can be enhanced, and when the high-rate and high-capacity resin-based hard carbon material is applied to a battery and used as an active substance of a battery negative electrode, the alternating-current resistance and the direct-current resistance of the battery can be reduced, the positive electrode capacity and the rate performance of the battery can be improved, and the cycle life can be prolonged; the battery calorific value is reduced.

The utility model belongs to the field of diamond generation by applying an ultrahigh pressure method, and particularly relates to a polycrystalline diamond sintering mold. In order to solve the technical problems that a sintering grinding tool in the prior art does not improve the heat conduction efficiency of an insulating heat conduction layer, the utilization rate of heat at the two axial ends of the insulating heat conduction layer is low, and uniform distribution of a temperature field in a synthesis cavity is not facilitated, the utility model provides a polycrystalline diamond sintering mold. The sintering mold comprises a synthesis cavity, an insulating heat conduction layer defining the synthesis cavity and a heating layer located outside the insulating heat conduction layer, thinning parts are arranged at the two axial ends of the insulating heat conduction layer, and the heating layer comprises embedded parts corresponding to the thinning parts. The heating amount of the two axial ends of the synthesis cavity can be increased through the embedding parts, the utilization rate of heat of the two axial ends of the insulating heat conduction layer can be increased through the thinning parts, and therefore the temperature of the two ends of the synthesis cavity is increased, and temperature field distribution in the synthesis cavity is more uniform.

The invention discloses a relay, which comprises a shell, a magnetic circuit part, a contact part and a pushing part, and is characterized in that the magnetic circuit part is mounted on the shell and comprises at least two magnetic circuit units; the contact part is arranged on the shell and comprises a movable spring group, a static contact group and a load terminal; the movable spring groups and the static contact groups are arranged corresponding to the magnetic circuit unit, and each movable spring group is provided with a movable contact group corresponding to the static contact group; each movable spring group and the corresponding static contact group jointly form a switch; the movable spring group and the static contact group in each switch are respectively connected with different load terminals, and at least one load terminal is shared by at least two switches and forms a common terminal; and the pushing part comprises a pushing piece accommodated in the shell, the pushing piece and the magnetic circuit unit are correspondingly arranged, and the pushing piece is driven by the corresponding magnetic circuit part to drive the corresponding movable spring group, so that the movable contact group and the corresponding static contact group are closed or opened. By adopting the technical scheme, the occupied space is smaller than that in the prior art for realizing the functions of more than two switches.

According to the control method and control system of the frequency conversion device and the air conditioner, under the condition that the temperature data exceeds the first temperature threshold value, the dead zone time and / or the minimum opening time of the frequency conversion device are / is dynamically adjusted, effective control over the temperature of the frequency conversion device is achieved, and the service life of the frequency conversion device is prolonged. The problem that the temperature of the frequency conversion device is not properly controlled in the prior art is solved. Specifically, the method can effectively reduce the switching frequency and continuous turn-on duration of switching devices such as an IGBT (Insulated Gate Bipolar Transistor) and the like in a mode of timely increasing the dead time and the minimum turn-on time, thereby reducing the calorific value of the switching devices, reducing the turn-on and turn-off loss, and avoiding performance reduction or device damage caused by overhigh temperature. Meanwhile, the control mode does not change the carrier frequency, so that the response speed and the control precision of the system are not influenced, the stable output power of the frequency conversion device is ensured under severe working conditions, and the reliability and the service life of equipment are improved.

The charging port cover electromagnetic lock device suitable for the new energy automobile comprises a charging port box and a charging port cover capable of rotating around a hinge line, a permanent magnet assembly is installed at the front end, and an electromagnetic assembly is arranged on the charging port box. When power is not on, the permanent magnet assembly and the electromagnetic assembly are attracted, and the charging port cover is kept closed. During electrification, the electromagnetic assembly generates a magnetic field which repels the permanent magnet assembly, so that the charging port cover is opened. The charging port box is further provided with a protective cover, a filling groove is formed in the rear end of the protective cover, and the electromagnetic assembly is connected with the containing groove through the terminal interface. And an over-current protector element is arranged in the accommodating groove and is used for heat conduction. And a conduction wire group connected with an external power supply is arranged in the filling groove and is connected in series with the over-current protector element, the terminal interface and the electromagnetic assembly. The resistance of heat generated when the electromagnetic assembly is electrified is increased through the overcurrent protector element, the current intensity is reduced, and heating is reduced. The filling groove is filled with liquefied epoxy resin, and the electromagnetic assembly and the electric connection part thereof are sealed after solidification.

The utility model discloses a direct drive type drive and control integrated servo motor, which is characterized by comprising a servo driver and a permanent magnet synchronous motor, the permanent magnet synchronous motor comprises a machine shell, a rotor and a stator, the rotor and the stator are arranged in the machine shell, the machine shell comprises a shell, a front end cover and a rear end cover, the front end cover and the rear end cover are located at the two ends of the shell, the shell comprises an inner shell and an outer shell, a spiral heat dissipation flow channel is formed between the inner shell and the outer shell, and a heat dissipation plate is arranged on the outer surface of the outer shell; and the servo driver is arranged on the heat dissipation plate. According to the utility model, the driver and the motor are integrated, the installation space is reduced, the structure is compact, the installation is convenient, and the energy consumption, the calorific value and the operation noise are greatly reduced.

The invention discloses an energy supply transformer and a monitoring system and method. The energy conversion unit comprises a shell, a sealing terminal, and an iron core, a primary winding, a secondary winding, an insulating supporting plate, an insulating limiting plate, an insulating partition plate, an insulating pad and a metal support which are arranged in the shell; the sealing terminal is arranged on the shell and is used for sealing and leading signals in the shell out of the shell; one end of the metal support is fixed with the iron core through the insulation pad, and the other end of the metal support is fixed on the inner wall of the shell; the primary winding and the secondary winding are coaxially arranged with the iron core and are sleeved outside the iron core; the insulating support plate is arranged between the winding and the iron core and fills a gap between the winding and the iron core; the insulating limiting plate and the iron core are coaxially arranged; the insulating supporting plate and the insulating limiting plate are made of high-dielectric-constant materials. And an insulating partition plate is arranged between the primary winding and the secondary winding. The invention aims to solve the problems that a cantilever beam structure is large in stress, poor in heat dissipation performance and large in boundary dimension, and a voltage-sharing capacitor needs to be arranged.

The utility model provides an intelligent damper based on laminated MRE and a damping base. The intelligent damper based on the laminated MRE comprises an outer sleeve and an inner sleeve which can move relatively, the outer sleeve comprises a first sleeve body and a second sleeve body, the inner sleeve comprises a third sleeve body, the end of the third sleeve body is inserted into an annular cavity formed by the first sleeve body and the second sleeve body, and the head of the second sleeve body is connected with the bottom wall of the third sleeve body through an elastic piece. A first annular cavity is formed between the first sleeve and the third sleeve, a second annular cavity is formed between the third sleeve and the second sleeve, a plurality of laminated MRE units are arranged in the circumferential direction of the first annular cavity and the circumferential direction of the second annular cavity at intervals, and each laminated MRE unit is correspondingly sleeved with an enameled coil. According to the intelligent damper, the coil is directly wound around the MRE, and under the same MRE effect, the current needing to be connected can be reduced, so that the calorific value is reduced, and the intelligent damper is safer and more suitable for continuous power-on work.

The utility model discloses a large-tonnage pneumatic tensile test fixture which comprises a connecting device, and a clamping device is arranged at the bottom of the connecting device; the connecting device comprises a connector, a gap nut is arranged at the bottom of the connector, a top cover is fixedly arranged below the connector, a first air channel is formed in one side of the top cover, and a first connecting groove is formed in the outer side of the first air channel; according to the large-tonnage pneumatic tensile test fixture disclosed by the utility model, the problem that a conventional large-tonnage hydraulic tensile test fixture needs to be matched with a high-pressure oil station for use is solved through the design that the piston is driven to move by air blowing of the air pump, the noise generated during use is reduced, and meanwhile, the heating value and the maintenance cost are reduced; by means of a wedge-shaped self-locking material clamping mode, a sample with the tensile force not smaller than ton can be clamped only by applying small pre-pressure, so that the device can be suitable for tensile tests of metal and reinforced composite plates and bars, and the clamping stability of the device is higher.

The utility model relates to a double-hearth shaft kiln with an auxiliary nozzle. The auxiliary nozzle comprises a bottom nozzle and a channel nozzle, the two bottom nozzles are installed on supporting seats arranged in the centers of the bottoms of the two kiln chambers respectively, and spraying openings of the bottom nozzles extend to the bottom of the roasting zone. The multiple channel nozzles are installed on the top and the side portion of the center position of the connecting channel respectively. The working mode that a traditional double-hearth shaft kiln carries out full parallel flow roasting in a roasting kiln hearth and carries out countercurrent heat storage in a heat storage kiln hearth, namely the working mode of'full parallel flow roasting and countercurrent heat storage 'is changed into the working mode that parallel flow roasting is carried out in the roasting kiln hearth and countercurrent roasting and heat storage are carried out in the heat storage kiln hearth. The two-way roasting working mode of parallel-flow roasting, counter-flow roasting and heat storage is adopted, cooling air participates in combustion supporting, then a low-temperature airflow area where roasting belt materials of a heat storage kiln chamber are cooled is eliminated from the source, and the productivity and the product quality are improved.

The utility model discloses a permanent magnet speed reducer assembly suitable for a hoisting mechanism of a portal crane. The permanent magnet speed reducer assembly comprises a permanent magnet motor, a two-stage orthogonal shaft gear subassembly and a brake, the permanent magnet motor comprises a permanent magnet motor shell, and a motor stator and a motor rotor which are arranged in the permanent magnet motor shell; the two-stage orthogonal shaft gear subassembly comprises a large spiral bevel, an inner spline shaft, a sun gear, a planet gear, an inner gear ring and an input box body; the large spiral umbrella is arranged on the inner spline shaft and is meshed with the motor rotor through a tooth part; the inner spline shaft meshes with a sun gear; the planet gear is respectively meshed with the sun gear and the inner gear ring; the inner gear ring is fixedly connected to the input box body; the brake is connected with a tail end shaft body of the motor rotor, and a base of the brake is provided with a through hole used for being connected with a mounting plane. Compared with the prior art, the permanent magnet motor and gear transmission system integrated structure is adopted, the heating value is low, the overall efficiency is improved, parts are reduced, the maintenance cost is reduced, and the failure rate is reduced.

The invention discloses a stator punching sheet, a motor and a compressor, and relates to the technical field of motors, the stator punching sheet comprises a yoke part and a plurality of tooth parts, the plurality of tooth parts are arranged on the inner circumference of the yoke part at intervals, a stator slot is formed between two adjacent tooth parts, the plurality of stator slots comprise a plurality of first stator slots and a plurality of second stator slots, and the plurality of first stator slots and the plurality of second stator slots are arranged at intervals. The area of the first stator slot is larger than that of the second stator slot; wherein the distance between the first groove bottom and the center of the stator punching sheet is two times D1, the distance between the second groove bottom and the center of the stator punching sheet is two times D2, the groove width of each stator groove is W, the inner diameter of each tooth part is D3, D1 and D3 meet the condition that (D1-D3) / 2D3 is larger than or equal to 0.28 and smaller than or equal to 0.31, and W and D3 meet the condition that W / D3 is larger than or equal to 0.136 and smaller than or equal to 0.142. According to the technical scheme, the sizes of the stator punching sheet and the stator grooves are reasonably designed, so that the motor efficiency of the motor with the stator punching sheet is improved, the heating value of the motor is reduced, and the reliability and the stability of the motor in the operation process are improved.

The invention aims to provide an integrated bidirectional super charging pile based on medium-voltage power supply and an implementation method. The system comprises a medium-voltage isolation transformer, a bidirectional inverter, a reactive compensation module and a charging terminal. The primary side of the medium-voltage isolation transformer is connected with a medium-voltage power grid, the medium-voltage isolation transformer comprises a primary winding or a plurality of secondary windings, and the alternating current input end of the bidirectional inverter is connected to the secondary windings of the medium-voltage isolation transformer; the reactive compensation module is connected in parallel with a secondary winding of the medium-voltage isolation transformer, and the capacity required by the reactive compensation module is used for compensating reactive power generated during no-load operation of the medium-voltage isolation transformer; the input of the charging terminal is connected to the DC output of the bidirectional inverter. The system is applied to the technical field of charging pile open source control, and has the advantages that the structure is simple, the requirement of a super charging pile is met, medium voltage can be fully utilized for direct power supply, the overall power utilization efficiency is improved, and cost and noise are reduced.

The utility model relates to the technical field of backlight modules, in particular to a backlight module with a distributed bragg reflector (DBR) reflection structure, which comprises a substrate structure, an optical film, a light guide packaging structure and an assembly component, and the assembly component comprises an assembly frame, a baffle, two locking pieces, a flexible pad, two abutting pieces and a heat conduction structure. The substrate structure is located at the bottom of the assembly frame, the two abutting pieces are operated to abut against the two sides of the light guide packaging structure so that the optical module can be fixed in the assembly frame, then the baffle is operated to be buckled with the notch of the assembly frame, the locking piece is operated for assembly, overall assembly of the backlight module is completed, and the heat productivity of the overall backlight module is reduced in cooperation with the heat conduction structure. The problems that in the long-time use process of an existing backlight module with a DBR reflection structure, a large amount of heat can be generated by the backlight module, adhesion of all structures in the backlight module is likely to be loosened, and follow-up normal use is affected are solved.

The application provides a non-liquid-cooled heavy-current connector, relates to the technical field of electric connectors, and solves the problem of small charging power of the existing liquid-cooled charging connector. The device comprises a socket assembly and a plug assembly which are matched with each other, and at least two groups of power terminals are arranged on the socket assembly and the plug assembly. Each group of power terminals comprises a positive power terminal and a negative power terminal. The cross-sectional area of the power terminal is not less than 120 mm2, and the power terminal can bear a working current of not less than 300 A. The application adopts the setting mode of multiple groups of power terminals to reduce the heat generation of each power terminal by several times, so that the liquid-cooled charging connector can also realize high-power charging.

The present invention discloses an electromagnetic heater power supply with over-voltage and under-voltage protection functions, including a circuit, wherein the circuit is electrically connected to an over-voltage and under-voltage protection circuit. The circuit is electrically connected to a circuit board. The over-voltage and under-voltage protection circuit is electrically connected to an over-voltage and under-voltage protection circuit board. The over-voltage and under-voltage protection circuit board has an over-voltage and under-voltage protection circuit board. Alternatively, the over-voltage and under-voltage protection circuit board has two sub-over-voltage and under-voltage protection circuit boards. One of the over-voltage and under-voltage protection circuit boards has an over-voltage and under-voltage protection circuit. Alternatively, one of the over-voltage and under-voltage protection circuit boards has two sub-over-voltage and under-voltage protection circuits. Both of the sub-over-voltage and under-voltage protection circuit boards have sub-over-voltage and under-voltage protection circuits. When the power supply voltage of the electromagnetic heater power supply with over-voltage and under-voltage protection functions is too high or too low, the power supply can be quickly cut off to prevent the insulated gate bipolar transistor (i.e., IGPT) from being burned out.

The invention relates to the technical field of control equipment, and discloses a three-redundancy-based electromagnetic valve control system which comprises a time delay relay circuit, a DC / DC and anti-reverse circuit and a three-redundancy control circuit, the time delay relay circuit comprises a first time delay relay, a first rectifier diode, a first control module, a second control module and a third control module, and the first control module, the second control module and the third control module are connected in parallel. The first control module, the second control module and the third control module are respectively connected with three groups of different electromagnetic valve control signals, and any group of electromagnetic valve control signals effectively control the first delay relay to work; the DC / DC and anti-reverse circuit comprises a first DC / DC conversion circuit and a first ideal diode; the triple-redundancy control circuit comprises a fourth control module, a fifth control module and a sixth control module which are connected in parallel, one end of the first control module is connected with the negative electrode of the electromagnetic valve working power supply, the other end of the first control module is connected with the other end of the electromagnetic valve, and any group of electromagnetic valve control signals effectively control the electromagnetic valve to work. By adopting the method, three-redundancy control can be realized, and the reliability of an electromagnetic valve control system is improved.

The application discloses a hot water boiler based on a porous medium burner, which comprises a hot water boiler shell, wherein the hot water boiler shell comprises a boiler barrel, the outer side of the boiler barrel is provided with a water jacket for storing water, and the inside of the boiler barrel is fixedly provided with a porous medium burner; the inner cavity of the porous medium burner comprises a combustion reaction zone, the two ends of the combustion reaction zone are provided with anti-backfire areas, the two ends of the porous medium burner are provided with mixed gas inlets, the mixed gas inlets are connected with mixed gas input pipelines, one end of the mixed gas input pipelines extends out of the hot water boiler shell and is connected with a gas fuel supply device; the porous medium burner is internally provided with an ignition device, mixed gas flows into the combustion reaction zone from the mixed gas input pipelines and is ignited by the ignition device, heat generated by combustion of the mixed gas heats water in the water jacket, flue gas is discharged from the combustion reaction zone through the pores of the porous medium of the porous medium burner and is discharged into a flue gas treatment mechanism connected with the hot water boiler shell, the gas utilization rate is improved, and the heat diffusion speed is slowed down.

This invention discloses an optimized method for stator and rotor welding processes in the field of motor manufacturing, comprising the following steps: improving welding quality through pretreatment, coating with modified composite materials, and optimizing laser welding parameters. During pretreatment, the stator and rotor areas to be welded are sanded with 800-1200 grit sandpaper, followed by ultrasonic cleaning with acetone or alcohol for 10-15 minutes to achieve a surface roughness Ra ≤ 1.6 μm; a 0.1-0.3 mm thick layer of modified composite material is coated onto one surface and dried at 80-120°C for 1-2 hours; laser welding is employed, with the molten pool temperature monitored at 1800-2200°C during welding; immediately after welding, the welded parts are placed in a holding furnace at 200-300°C for slow cooling for 2-4 hours, and then cooled to room temperature at a rate of 5-10°C / min. This method effectively improves the strength, toughness, and crack resistance of the welded joint, reduces the heat-affected zone, and minimizes deformation.

The present application relates to the technical field of metallurgical production, in particular to a method for reducing the mixing amount of coke oven gas in lime double-D kiln by oxygen-enriched combustion, specifically, oxygen injection guns and oxygen-enriched valve groups are installed in the air pipeline of the lime double-D kiln to control the oxygen flow, the lime double-D kiln is started, mixed gas containing coke oven gas and converter gas is introduced, the oxygen-enriched valve groups are then started, the oxygen enrichment degree is set from 1% and gradually increased, and the highest oxygen enrichment degree does not exceed 9%, the air-fuel ratio and the excess air coefficient are simultaneously reduced, and the mixed gas flow is reduced. By the method of oxygen-enriched combustion, the oxygen content in the calcination combustion-supporting air is increased, the combustion efficiency is improved, the combustion temperature is optimized, the air demand and the combustion product generation amount are reduced, the heat taken away by the flue gas is reduced, thereby the heat loss of exhaust gas can be reduced, the theoretical combustion temperature and the furnace gas radiation capacity can be improved, and the energy consumption can be greatly reduced.

The utility model provides a mute cooling water pump which comprises a pump shell, an impeller, a water pump shaft, a motor, a speed reducer, a cooling flow channel, a first bearing and a second bearing, a volute cavity is formed in the head of the pump shell, the impeller is arranged in the volute cavity, the water pump shaft is connected with the impeller, and one end of the head of the water pump shaft is connected with the first bearing; external water flow enters the worm cavity through the water inlet, the motor drives the water pump shaft to rotate through the speed reducer, the impeller drives the water flow to flow out of the water outlet, the first bearing and the second bearing are installed on the water pump shaft and support each other, stress can be equally shared, the load of a single bearing is reduced, and then the heating value of the bearings is reduced; and heat generated by the first bearing can be cooled through water in the volute cavity, heat generated by the second bearing can be cooled through water in the cooling flow channel, the heat is carried out of the water outlet of the volute cavity to flow out through continuous flowing of water flow, and therefore the water pump capable of achieving self-cooling is provided.

A lighting lamp assembly for a household appliance comprises a lamp holder, a lampshade covers the top of the lamp holder, the lampshade is made of transparent materials and is of a hollow shell-shaped structure, and a first electrode plate and a second electrode plate which penetrate through the upper end face and the lower end face of the lamp holder are further arranged in the lamp holder. The power line is connected with the first electrode plate and the second electrode plate on the lower portion of the lamp holder. The light-emitting module located in the lampshade is connected with the first electrode plate and the second electrode plate on the upper portion of the base. Wherein the light-emitting module comprises a full-wave rectifier bridge composed of four light-emitting PN junctions, and direct current output by the output end of the rectifier bridge is supplied to a plurality of main light-emitting PN junctions for use; one input end of the full-wave rectifier bridge is connected in series with a dropping resistor and then connected with the first electrode plate, and the other input end of the full-wave rectifier bridge is connected with the second electrode plate. The beneficial effects of the utility model are that by adopting the light-emitting module and combining the full-wave rectifier bridge and the LED filament technology, the efficiency of converting electric energy into light energy can be effectively improved.

The application discloses an energy-saving LED display screen with a reverse common cathode and a driving method thereof, and belongs to the technical field of LED display. The application aims at the problem that the single voltage power supply of the traditional common anode LED display screen leads to high power consumption and serious heat generation of the first display content LED, and adopts a reverse common cathode structure of dynamic anode voltage switching + cathode time-sharing gating: the ICND2018 row driving IC provides switchable double voltages for the common anode of the LED, outputs 2.6~2.8V low voltage when the first display content is displayed, and outputs 3.6~3.8V standard voltage when the second display content and the third display content are displayed; three pieces of ICND1065L16 channel constant current sink column driving IC are matched to independently control the three-color cathodes of the first display content, the second display content and the third display content, and precise power supply of color separation is realized. Under the premise of being fully compatible with the existing SMDTOP three-in-one common anode lamp beads, the first display content LED loop voltage difference is reduced from 1.8V to 0.8V, and the power consumption of the single first display content lamp is reduced by about 55%.

The invention discloses a MINI RGB LED lamp bead with a built-in resistor and a preparation method of the MINI RGB LED lamp bead, and relates to the technical field of LEDs, the MINI RGB LED lamp bead with the built-in resistor comprises a substrate, a first chip, a second chip, a third chip and a chip resistor; the front surface of the substrate is provided with a front circuit, the back surface of the substrate is provided with a back circuit, and the front circuit and the back circuit are connected through a through hole; the front circuit comprises a die bonding area, a bonding wire area, an insulating area and a groove area; the die bonding area comprises a first die bonding area, a second die bonding area and a third die bonding area which are separated from one another, the first chip is arranged in the first die bonding area, the second chip is arranged in the second die bonding area, and the third chip is arranged in the third die bonding area; a groove is formed in the groove area, and the chip resistor is arranged in the groove and connected with the first chip in series. According to the invention, burning of the lamp beads and caterpillars on the display screen due to water vapor permeation can be reduced, so that the process yield and the display effect are improved.