23results about How to "Uniform density distribution" patented technology

The invention relates to the field of road engineering, in particular to a compaction test method of an asphalt cold patch material, which comprises the following steps: setting parameters of a rotary compactor according to the compaction degree of a to-be-tested asphalt pavement, and calibrating a rotation angle parameter; preparing an asphalt test piece through a space enclosed by a test mold and a pressure plate of the rotary compactor, compacting the asphalt test piece, and measuring the mass m4 of the asphalt test piece; drilling a notch from the center of the top of the asphalt test piece; filling the gap of the asphalt test piece with an asphalt cold-patch material to be tested to obtain an asphalt cold-patch test piece; compacting the asphalt cold-patch test piece by using a rotary compactor, and measuring the mass m5 of the asphalt cold-patch test piece; preparing the asphalt cold patch material according to at least two groups of parallel tests for calculating the theoretical maximum relative density B of the asphalt cold patch material; calculating the actual density A of the compacted cold patch material in the asphalt cold patch test piece by using the difference between m5 and m4; the compaction degree G is obtained according to the ratio of A to B; the problems that an evaluation result of an existing compaction test method cannot truly reflect the actual construction condition and the test cost is high are solved.

The invention discloses a preparation method and application of a composite 3D negative electrode current collector for a lithium metal battery, and belongs to the field of batteries, and the preparation method comprises the following steps: firstly, introducing a reduced graphene oxide artificial interface layer on the surface of the current collector through a chemical coating means, so that the reduced graphene oxide artificial interface layer and the current collector are tightly combined and are not easy to fall off after being bent due to chemical reaction in the process; and the conductivity and the ductility of the coated current collector are not greatly damaged. Then, on this basis, a three-dimensional micro-pit array structure with a lithium-loving oxide layer is introduced on the surface of the current collector by means of laser etching, so that the specific surface area of the current collector is increased, the surface current density distribution is adjusted, lithium metal is effectively induced to be uniformly deposited on the macro-scale and the micro-scale, and formation of lithium dendrites is inhibited; the lithium copper half battery assembled by the current collector has excellent cycle performance. The preparation process flow is simple, the composite 3D current collector with excellent performance is prepared, the cost is effectively reduced, and the production efficiency is improved.

The invention relates to the field of semiconductors, and discloses a redundant metal filling optimization method and device, electronic equipment and a readable storage medium, and the method comprises the steps: S101, obtaining a to-be-filled layout which comprises a fillable metal region and a plurality of divided window regions with the same size; step S102, filling redundant metal in the fillable metal area to obtain a filled layout; step S103, determining the density of metal patterns in each window area in the filled layout; step S104, determining a new fillable metal area based on the metal pattern density to obtain a new layout to be filled, and entering the step S102 until the new fillable metal area cannot be determined; the metal pattern density of the redundant metal filled at each time is greater than the metal pattern density of the redundant metal filled at the last time. The redundant metal is added progressively according to the density of the metal patterns, the effect of uniform density distribution of the metal patterns on the layout is achieved, and the uniformity of the metal patterns on the layout is improved.

The invention discloses tungsten steel powder pressing forming equipment, and relates to the technical field of metal powder pressing forming, the tungsten steel powder pressing forming equipment comprises a machine base, a supporting frame is arranged on the machine base, the supporting frame extends outwards to the outside of the machine base, a feeding station, a scraping station and a pressing station are sequentially arranged at the upper end of the supporting frame, a scraping mechanism is arranged above the scraping station, and a pressing mechanism is arranged above the pressing station. A pressing mechanism is arranged above the pressing station, a movable bottom frame is arranged at the upper end of the supporting frame in a sliding mode, a feeding frame is fixedly arranged at the upper end of the movable bottom frame, the upper portion and the lower portion of the feeding frame are of an open structure, a bearing plate is movably arranged in the feeding frame, and lifting of the bearing plate is controlled through a jacking mechanism. The scraping plate is driven by the scraping mechanism to reciprocate on the upper surface of the tungsten steel powder mixture so that the tungsten steel powder mixture can be scraped flat, accumulated materials accumulated at the two ends of the feeding frame can also be pushed flat in the reverse direction, and therefore the flatness of the upper surface of the tungsten steel powder mixture is guaranteed.

A powder isostatic pressing method, characterized in that it includes the following steps: a first step, loading a mixed powder or a compression-molded soft blank into a sheathing mold, wherein the mixed powder or the compression-molded soft blank is a hard alloy or metal ceramic material added with 1-4wt.% paraffin wax; placing the sheathing mold in a vacuum box and vacuum heating it, the heating temperature is 40-60°C, and the insulation time is 20-60min; on the other hand, loading resin into a metal mold, and heating the metal mold until the resin inside it is completely softened; a second step, placing the sheathing mold into the metal mold, and the sheathing mold is immersed in the resin in the metal mold; a third step, using a press to drive the punch of the metal mold, so that the punch enters the mold cavity of the metal mold to apply a pressure of 20-100MPa to the resin molten liquid, maintaining the pressure for 0-30S and then releasing the pressure, taking out the sheathing mold, and cutting the sheathing mold to obtain a formed green sheet.

The utility model relates to the technical field of material surface coating, in particular to a plane cathode for coating and coating equipment, which comprises a cathode base, a magnet component arranged in the cathode base, a target horizontally arranged on the cathode base, a gas channel arranged beside the cathode base, and working gas output from the gas channel. Outlets of the gas channels are uniformly formed in the length direction of the target material; according to the utility model, the gas channel for inputting the working gas is combined with the planar cathode, and meanwhile, the working gas input into the gas channel can be uniformly output along the length direction of the target material, so that plasmas in the working gas are uniformly distributed on the surface of the target material, and the thickness of a sputtered and deposited film is uniform; the film forming thickness can be indirectly regulated and controlled by regulating and controlling circulation of working gas in the gas channel, vacuum breaking is not needed, meanwhile, the structure is simple, it can be effectively guaranteed that the thickness of a base plane formed film is even and flat, and the film coating quality and efficiency of film coating equipment are effectively improved.

This invention discloses a microchannel heat exchanger driven by an electrohydrodynamic (EHD) pump, characterized by comprising an EHD pump unit and a microchannel heat exchange unit; the EHD pump unit includes a pair of emitter / receiver electrodes, alternately arranged along the flow direction at the bottom of the microchannel, and several EHD pump units are connected in series to form a multi-stage electrode array; the microchannel heat exchange unit includes a jet port and an array-arranged microchannel; the dielectric liquid generated by the EHD pump is directly sprayed into the microchannel heat exchange region through the jet port; the EHD pump unit and the microchannel heat exchange unit are integrated in the same substrate, so that the electrode arrangement area and the heat exchange channel area form a continuous flow path.

The present application relates to the technical field of target material preparation, and provides a ceramic evaporation target material and a preparation method thereof and a photovoltaic cell, including: pre-pressing a mixed ceramic powder into a plurality of green bodies with different densities; stacking the green bodies in the order of decreasing density from the middle to the two ends to obtain a composite green body; subjecting the composite green body to a bidirectional pressing treatment to obtain a superimposed green body; and subjecting the superimposed green body to high-temperature sintering to obtain a ceramic target material. The present application stacks the green bodies in the order of decreasing density from the middle to the two ends, so that the density of the middle part of the composite green body is greater than that of the two ends, and compensates for the density difference caused by the pressure applied to the middle part of the composite green body due to the bidirectional pressing being smaller than that of the two ends, so that the density distribution of the superimposed green body is uniform, so that the ceramic evaporation target material has uniform density and good thermal conductivity. Moreover, the target green body connection surface formed by the superposition of multiple green bodies can block the longitudinal transmission of target material cracks and prevent heat from being transmitted longitudinally to the center of the target material during the coating process, thereby preventing the target material structure from collapsing or powder splashing.

The invention discloses a concrete compaction adjusting type vibration machine, and relates to the technical field of construction machinery, the concrete compaction adjusting type vibration machine comprises an arc-shaped frame, the arc-shaped frame is provided with a combined vibration assembly, the combined vibration assembly comprises a middle supporting plate, the middle supporting plate is welded to the middle of the arc-shaped frame, and the two ends of the arc-shaped frame are welded to the two ends of a bottom supporting plate respectively; a first vibration motor is installed at one end of the top face of the middle supporting plate, the output end of the first vibration motor is connected with a vibration head through a rubber hose, and vibration holes are formed in the middle of the middle supporting plate and the middle of the bottom supporting plate. Part of the concrete is pushed to the two sides of the triangular frame and pushed to be flat, the other part of the concrete enters the top face of the lifting plate in the triangular frame through the uniform holes, so that the surface of the concrete is flush, multiple devices are combined side by side, the combined devices are pushed to advance when the concrete is vibrated, and therefore the vibration area is enlarged, and the vibration efficiency is improved.

The utility model provides a rhombic material box unit and a graphitization material box. Each rhombic material box unit comprises two first carbon plates which are oppositely arranged in a first direction X and two second carbon plates which are oppositely arranged in a second direction Y, and the first direction X and the second direction Y are perpendicular to each other in the thickness direction of the first carbon plates; buckles are arranged at the two ends of the first carbon plate, clamping grooves are formed in the two ends of the second carbon plate, and the buckles are clamped in the clamping grooves, so that the first carbon plate and the second carbon plate are sequentially enclosed to form a rhombus. According to the utility model, the two convex (buckle) and concave (clamping groove) carbon plates are spliced to form the material box, and a stand column is omitted, so that the material consumption of the material box is reduced, and the use and maintenance cost of the material box is reduced.

The invention discloses an alkali metal atomic gas chamber laser non-magnetic heating temperature control device and method.The device comprises a heating laser, an optical fiber, a cylindrical cavity structure, an atomic gas chamber, an infrared thermometer, a temperature control circuit board and an upper computer, the atomic gas chamber is arranged in the cylindrical cavity structure, and a quantum well mixing system is arranged on the outer wall of the atomic gas chamber; light through holes are formed in the periphery of the cylindrical cavity structure, the heating laser and the infrared thermometer respectively penetrate through the light through holes of the cylindrical cavity structure through optical fibers to be connected with the atomic gas chamber, the infrared thermometer is connected with the temperature control circuit board, the temperature control circuit board is connected with the heating laser through optical fibers, and the temperature control circuit board is connected with the upper computer. Magnetic field interference can be avoided, the stability of a high-temperature heating state is kept, and the precision of magnetic field measurement is improved.

The utility model relates to the technical field of magnetic materials, and discloses a high-shielding magnetic material production mold which comprises a mold body, a circular groove is formed in the middle of the upper surface of the mold body, rectangular grooves are formed in the two ends of the upper surface of the mold body, a plurality of positioning holes are formed in the upper surface of the mold body, and the positioning holes are communicated with the circular groove. The mold comprises a mold body, the upper end of the mold body is connected with a mounting plate through positioning bolts, a plurality of buffer springs are fixedly mounted at the bottom of the mounting plate, a plurality of through holes are formed in the mounting plate, and the buffer springs are located between the positioning holes and the through holes. The diameter and the width of the circular protruding block and the rectangular protruding block arranged at the bottom of the mounting plate are equal to those of the circular groove and the rectangular groove, so that the magnetic materials can be well embedded into the circular groove and the rectangular groove, the magnetic materials in the circular groove and the rectangular groove can be conveniently pressed, and it is guaranteed that the density distribution of pressed products is uniform.

The invention discloses an X-cut lithium niobate crystal growth method and a temperature field structure, the X-axis is defined to extend upwards, the temperature field structure used in the method comprises a heat preservation structure and a crucible, the heat preservation structure and the crucible are both elliptical cylinders with open upper ends and closed lower ends, during use, the crucible is placed in the heat preservation structure, the central axes of the crucible and the heat preservation structure coincide, and the crucible is placed in the heat preservation structure. The thermal insulation structure is provided with a long axis a1 and a short axis b1, the crucible is provided with a long axis a2 and a short axis b2, the long axis of the thermal insulation structure and the long axis of the crucible both extend in the Y-axis direction, the short axis of the thermal insulation structure and the short axis of the crucible both extend in the Z-axis direction, and the lithium niobate crystal grown by the X-cut lithium niobate crystal growth method is an elliptic cylinder. According to the invention, the problem that the crystal is easy to crack in the prior art is solved, and the success rate of growth of the X-axis lithium niobate crystal is improved.

The invention discloses an inner-cooling forming flat wire winding based on a separable stator and a winding method of the inner-cooling forming flat wire winding. In the winding forming process, a wave winding flat wire winding structure is adopted to enable windings to be tightly arranged, and efficient current conduction and space utilization are achieved; and during installation, the winding can be integrally and smoothly inserted through the open slot structure, so that the convenience and the efficiency of the production process are improved. After winding inserting is completed, the separable tooth crests are in close fit with the stator teeth, the open slot structure is converted into the semi-open slot structure, and the problems that due to the traditional open slot design, the magnetic flux density is not uniform, and the cogging torque pulsation is too large are solved. The conversion of the structure not only improves the air gap flux density distribution of the motor and reduces the mechanical vibration and energy loss during operation, but also remarkably improves the stability of the motor and the reliability of long-term operation.

The invention belongs to the field of powder compression molding, and particularly discloses an ultrahigh-pressure flexible punch assembly, a die, a system and an operation method. The flexible punch assembly comprises an upper pressing plate, a transition plate and a soft film. The upper pressing plate is fixedly connected with the transition plate and limits the soft film at a fixed position; a liquid inlet and outlet channel is formed in the upper pressing plate and communicated with the soft film and an external ultrahigh-pressure system. A die, a system and an operation method are further designed based on the flexible punch assembly. Compared with the prior art, high-pressure liquid can be injected to directly act on powder through the soft film to achieve rapid pressing of the powder. The ultrahigh-pressure flexible punch pressing technology can achieve pressing of special-shaped powder products, the requirement for multiple times of pressing of powder can be met, and the pressing quality of the powder is improved. And in combination with a powder vacuumizing technology, the powder pressing effect can be effectively improved.

The present invention provides a vehicle-mounted seeder and a method for using the same, comprising an L-shaped vehicle body consisting of a cab and a carrier, the carrier being arranged in front of the cab, and characterized in that: a transport mechanism and a seeding mechanism arranged in front of the carrier are arranged on the carrier, the transport mechanism comprising a conveyor belt and a first rotating assembly, the first rotating assembly being arranged on the carrier, a motor for driving the first rotating assembly to rotate being arranged on the carrier; the seeding mechanism comprising a frame, the frame being arranged in front of the carrier, a guide rail being arranged around the inner side of the frame, a seeding rack for planting seeds into the soil being arranged in the guide rail, and first support plates being fixedly arranged on the lower cross bars of the front and rear frames arranged in the frame; the present invention has a simple structure, convenient operation, high strength and uniform seed placement density.

The present invention relates to a composite board continuous production equipment and a production process thereof, and belongs to the technical field of building board production equipment and a production process thereof. It comprises a wire tube installation mechanism, a positioning plug-in installation mechanism is arranged behind the wire tube installation mechanism, a positioning plug installation mechanism is arranged above the wire tube installation mechanism, a flipping mechanism is arranged behind the positioning plug installation mechanism, an upper hard panel conveying mechanism is arranged behind the flipping mechanism, a lower hard panel conveying mechanism is arranged behind the positioning plug installation mechanism, a pouring gun head is arranged above the lower hard panel conveying mechanism, an installation mechanism is arranged behind the upper hard panel conveying mechanism, a laminator is arranged behind the lower hard panel conveying mechanism, side chain blocks are arranged on both sides of the length direction of the laminator, a composite board cross-cutting mechanism is arranged behind the laminator, an accelerating horizontal conveying roller table is arranged behind the composite board cross-cutting mechanism, and milling saws are arranged on both sides of the length direction of the vertical conveying roller table. The present invention has high production efficiency, uniform density distribution of the processed composite board, and stable and reliable quality.

The present application provides a battery cell, a battery device and an electric device. The battery cell includes an electrode assembly, the electrode assembly includes a first pole piece, the first pole piece includes a first body and a plurality of first pole ears, the first pole ear is connected to one end of the first body along the first direction, and the plurality of first pole ears are arranged at equal intervals along the winding direction of the first pole piece; all the first pole ears are stacked along the second direction and form a first common stacking area, in a projection plane perpendicular to the second direction, the orthographic projections of the areas of any two first pole ears located in the first common stacking area overlap, in the first common stacking area, two adjacent first pole ears are connected, in the projection plane perpendicular to the second direction, the ratio of the orthographic projection area of ​​the first common stacking area to the orthographic projection area of ​​any first pole ear is greater than or equal to 0.5, which is conducive to uniform current density distribution and better firmness of connection between each first pole ear and connection between each stacked first pole ear and electrode lead-out portion.

A new structure of catalyst distributor mainly relates to the field of catalytic cracking technology, comprising an outer sleeve body and a spent riser, the outer sleeve body comprises coaxially distributed first sleeve body and second sleeve body, the bottom of the first sleeve body is provided with an annular top plate, the outer edge of the top plate and the top of the second sleeve body are provided with a head, the bottom of the second sleeve body is provided with a fluidization wind ring pipe, the spent riser penetrates through the first sleeve body and the head and then extends into the second sleeve body, a plurality of nozzles are arranged on the head, and the inner surfaces of the top plate, the head and the nozzles are coated with a wear-resistant layer. The catalyst distributor with the structure can make the density of the catalyst uniformly distributed in the distributor, avoid the mixing combustion of carbon monoxide and oxygen in the dense phase bed layer caused by the uneven distribution of the catalyst, and thus cause damage to the equipment of the dilution catalyst bed layer; the catalyst can also effectively resist the continuous erosion of the catalyst, reduce the wear of the distributor and other internal parts, and prolong the service life of the distributor.

The invention discloses a multi-target deposition control method and system, a medium and equipment. The multi-target deposition control method comprises the following steps: acquiring angle parameters between a substrate and a plurality of targets; environmental parameters in the cavity are adjusted to meet preset standards; based on the angle parameters and a preset control strategy, electric fields are applied to the multiple target positions respectively, a uniform composite electric field is formed through superposition, and the substrate is located in the composite electric field; the target position is deposited on the substrate through the electric field to form a film material, and control parameters of the electric field are adjusted based on thickness parameters of the film material until deposition is completed; a plurality of non-parallel target positions are arranged on the outer side of a substrate, an electric field is applied to each target position, a composite electric field with uniform strength is formed at the position of the substrate, and plasma density distribution is uniform, so that the sputtering rate and direction of a target material on the target positions tend to be consistent on the surface of the whole substrate, and the uniformity of film material thickness preparation is ensured; and the electric field is uniformly distributed, so that the target material is uniformly etched, and the utilization rate can be increased from 40-50% to 60-70%.

The invention discloses a high-wettability gradient aperture composite diaphragm and a preparation process thereof. The diaphragm comprises a polyolefin base membrane layer and a synthetic fiber web layer prepared by a spunlace process, the overall thickness of the diaphragm is 8-12 [mu] m, the aperture of one side facing the positive electrode is 30-50 nm, and the aperture of one side facing the negative electrode is 50-100 nm; and the synthetic fiber web layer contains a tannic acid modifier. The tannic acid modified synthetic fiber web layer in the composite diaphragm can provide better wettability for the composite diaphragm, and polar functional groups on the surface of the tannic acid modified synthetic fiber web layer can homogenize lithium ion flow, guide uniform deposition of lithium and inhibit generation of lithium dendrites. The polyolefin layer mainly provides mechanical strength, and forms a gradient aperture structure with the spunlace modified polyethylene layer, so that the uniformity of current density is improved, the uniform deposition of lithium is effectively induced, and the growth of lithium dendrites is reduced.

The present invention discloses an ion source device with adjustable plasma density, comprising a discharge chamber, a spiral coil and an ion source chamber coaxially arranged from the inside to the outside; a metal foil is arranged on the outer wall of the discharge chamber, and the metal foil can shield the inner edge magnetic field strength of the discharge chamber, neutralize the high plasma density caused by the skin effect, and make the plasma density in the discharge chamber uniform. The width W of the metal foil ranges from 1 to 20 mm, and the thickness T of the metal foil ranges from 0.1 mm to t, where t is the skin depth; the thickness T and surface area of ​​the metal foil are selected according to the difference between the edge plasma density and the central area plasma density in the discharge chamber. The present invention adds a Faraday structure outside the discharge chamber, distributes power to the Faraday structure, and adjusts the plasma density according to different working conditions, thereby effectively improving the etching uniformity.

This invention discloses a pressure testing device, a tobacco slurry preparation system, and its applications. The pressure testing device includes a loading mechanism, an automatic pressing unit, a control system, and a pressure sensing mechanism. The loading mechanism contains loose tobacco material, which is pressed to form tobacco slurries. The automatic pressing unit is connected to the loading mechanism and is driven by the control system to press the loose tobacco material within the loading mechanism. The pressure sensing mechanism measures the pressure exerted on the loose tobacco material during the pressing process. Before preparing samples of loose tobacco with unknown properties, the pressure testing device is used to investigate the control parameters for the tobacco slurry preparation process. Experimental tobacco slurries are obtained by pressing the loose tobacco material using the pressure testing device to determine the sample preparation control parameters for achieving uniform density distribution of the material. Then, using the obtained sample preparation control parameters, a different preparation device is used to obtain tobacco slurries for measuring thermophysical parameters.