20results about How to "Improve uneven distribution" patented technology

The invention provides a monocrystalline silicon wafer texturing structure of a solar cell, a texturing additive, a texturing solution, a texturing method and the solar cell. The texturing additive comprises 0.01-0.1 wt% of a nucleating agent, 0.03-0.5 wt% of a surface forming agent, 0.06-1 wt% of a tower surface etching agent, 0.1-1 wt% of a dispersing agent, 5-20 wt% of a defoaming agent and the balance of deionized water. The nucleating agent is benzene ring-containing polyoxyethylene ether, the tower surface etching agent is a vinyl pyrrolidone copolymer, the nucleating agent forms hydrogen bonds with Si-OH on the surface of an SDR silicon wafer by virtue of EO chain segments and benzene rings, and the hydrogen bonds are adsorbed on the flat surface of the silicon wafer to form nucleating points. And after the pyramid is formed, the nucleating agent at the spire is separated from the spire and loses protection on the spire, the surface forming agent can still protect the surface of the tower due to relatively strong adsorption, and the spire is slightly corroded, the spire is smooth and the height-width ratio of the pyramid is reduced due to continuous corrosion of alkali liquor. The tower surface etching agent is subjected to ester hydrolysis due to alkali and high temperature, so that the water solubility of the copolymer is improved; and the tower surface etching agent is adsorbed on the tower surface by virtue of the long chain segment of the copolymer, and is continuously corroded at the tower surface to form a slight gully type tower surface.

The invention discloses a radio frequency module, which comprises a first tuner switch, and the first tuner switch comprises a first switch branch. The first switch branch comprises a first terminal, a second terminal, n switch units and n first resistors, the n switch units are sequentially connected between the first terminal of the first switch branch and the second terminal of the first switch branch in series, and the n first resistors are connected with the n switch units in parallel in a one-to-one correspondence mode. The first switch unit to the third switch unit from the first terminal of the first switch branch form a first switch network, the (n-2) th switch unit to the nth switch unit form a second switch network, and n is a positive integer greater than or equal to 6; at least one end of the first harmonic processing unit is connected with the first switching network, and at least one end of the second harmonic processing unit is connected with the second switching network; harmonic signals in the first tuner switch are suppressed, and the linearity of the first tuner switch is further improved.

The invention discloses a cyaniding silver plating processing device and method for aero-engine parts, and belongs to the technical field of aero-engine part processing. The cyaniding silver plating processing method for the aero-engine parts mainly comprises the following process steps of acceptance check, water solution oil removal, liquid sand blowing, electrolytic oil removal, cyaniding copper pre-plating, cyaniding silver pre-plating, cyaniding silver plating, neutralization, hydrogen removal and inspection. According to the structural size of the wandering star gear roller bearing retainer, the technical characteristics of the cyaniding silver plating process are combined, the cyaniding silver plating process is optimized, a pulse power supply is adopted to replace a direct-current power supply for cyaniding silver plating processing, and distribution deposition of a silver plating layer is optimized by setting a proper duty ratio, electroplating time and current density; the problem of non-uniform thickness of a silver coating on the part surface is solved; meanwhile, a part pocket silver coating binding force detection tool is designed, and the problems that the thickness of a cyanide silver coating of the wandering star gear roller bearing retainer is not uniform and the binding force of a working face pocket is difficult to detect are solved.

The application provides a single crystal furnace cyclone air distribution device, a single crystal furnace and a furnace protective gas flow optimization method, and belongs to the single crystal production equipment field.The device is arranged at the air inlet of the single crystal furnace and is located directly above the single crystal rod position in the furnace.The cyclone cylinder is arranged at the uppermost side of the single crystal furnace and is in a circular ring column shape.A gas flow guide structure is arranged on the inner wall of the circular ring column shape to guide the protective gas to form a cyclone.The air inlet is arranged on the circular top surface of the circular ring column shape and includes at least two air inlet holes that are symmetrically distributed with the center as the center, so that the protective gas enters the sealed cyclone cylinder from the air inlet.The circular top surface has a predetermined thickness, and when the circular air inlet hole of the air inlet penetrates the circular top surface, a bevel with a predetermined angle is formed, and the bevel direction is tangent to the spiral partition direction of the internal cyclone cylinder.The application improves the eccentric turbulent flow problem and improves the uniformity and oxygen reduction effect of the protective gas flow in the single crystal furnace.

The present invention provides a method for preparing D2 steel bars and wires by an arc continuous casting and rolling process, and belongs to the technical field of continuous casting and rolling of cold working die steel. The present invention melts, refines and degasses the raw materials for preparing D2 steel to obtain molten steel; the molten steel enters the continuous casting tundish, and a covering agent is added to the molten steel; the molten steel in the continuous casting tundish enters the crystallizer for solidification, and a continuous casting billet is continuously pulled out by continuous casting; the continuous casting billet is sequentially subjected to a first annealing, a continuous rolling and a second annealing to obtain D2 steel bars and wires. The present invention adopts a continuous casting + continuous rolling process to refine the thickness of the eutectic carbide network and improve the uneven distribution of eutectic carbides; at the same time, the macroscopic segregation of the steel billet is reduced, and the uniformity of the organization is improved. The obtained D2 steel bars and wires have an excellent low-magnification organization level, and have good service performance and service life. At the same time, the present invention adopts a continuous casting + continuous rolling process to prepare D2 steel bars and wires with a short production process, which can save production procedures, save energy and reduce consumption, and reduce costs and increase efficiency.

The utility model relates to the technical field of dry-mixed mortar, and discloses a continuous stirring device for dry-mixed mortar production, which comprises a support frame, one side of the upper end of the support frame is fixedly connected with an external shell, the side surface of the external shell is fixedly connected with a motor, and the output end of the motor is fixedly connected with a speed reducer. The speed reducer is fixedly connected to the interior of the external shell, the output end of the speed reducer is fixedly connected with a stirring shaft, the side surface, away from the motor, of the external shell is fixedly connected with a conveying pipe, the conveying pipe is arranged outside the stirring shaft in a sleeving mode, and the outer surface of the conveying pipe communicates with a feeding bin. And a dust removal assembly is arranged outside the feeding bin. Water is pressurized through the water pump and then conveyed to the stirring shaft through the water conveying pipe, the water and mortar flowing in the same direction form hedging through the reverse water outlet holes, and three-dimensional turbulent flow mixing is formed in the conveying process of the water and materials in cooperation with shearing force generated by the rotating pins.

The application discloses a lapping device for steel ball processing and a use method thereof, and relates to the technical field of lapping, which comprises a machine body, upper and lower lapping discs, a lifting seat and a ball feeding transition area, and further comprises a liquid supply switching mechanism and a blockage positioning mechanism; the liquid supply switching mechanism makes multiple liquid injection holes spray liquid in sequence through the rotation of a distribution disc; the blockage positioning mechanism detects the liquid supply pressure of the corresponding liquid injection hole by using the same hydraulic sensor, and determines the blocked liquid injection hole corresponding to the abnormal hydraulic pressure by combining the position of the distribution disc recognized by a position detection assembly. The application supplies liquid to different annular groove ball feeding positions through multiple liquid injection holes, improves the uneven distribution of lapping liquid, switches the liquid injection path in sequence through the distribution disc, detects the hydraulic pressure of each path by using the same hydraulic sensor, and determines the current liquid injection hole by combining the position detection assembly, so that the blocked liquid injection hole can be quickly positioned when the hydraulic pressure abnormally rises, the hole-by-hole disassembly and inspection are reduced, and the maintenance efficiency is improved.

The invention discloses a cyanide-free electroplating machining device and method for aero-engine parts, and belongs to the technical field of aero-engine part machining. The cyanide-free electroplating processing technology for the aero-engine parts mainly comprises the steps of acceptance check, water agent oil removal, liquid sand blowing, electrolytic oil removal, weak corrosion, cyanide-free copper pre-plating, cyanide-free silver pre-plating, cyanide-free silver plating, neutralization, hydrogen removal and inspection. The cyanide-free silver plating technology is adopted to replace cyanide silver plating, the silver plating machining technology of the wandering star gear roller bearing retainer is optimized, the phenomenon that power lines are not evenly distributed due to the special structure of parts can be improved, the problems that a silver plating layer of the roller bearing retainer is not even in thickness and poor in binding force are solved, and the service life of the roller bearing retainer is prolonged. And the quality of a silver coating of the roller bearing retainer is effectively improved, and good application and popularization effects are achieved.

The invention discloses a container type furnace fence frame, and belongs to the technical field of heat treatment appliances, a bottom plate and a limiting plate are connected through a plurality of vertical rods, and the container type furnace fence frame is of a latticed rectangular fence frame structure on the whole and is used for containing a plurality of workpieces in the heat treatment process and keeping the workpieces arranged at equal intervals. The bottom plate is provided with a permeable source structure for permeability of the workpiece and a positioning part for fixing the vertical rod, and the positioning part adopts an embedded structure to ensure stable installation of the vertical rod. Limiting holes are evenly distributed in the limiting plate and used for inserting workpieces and achieving accurate limiting, and stable installation is formed through cooperation of the positioning structure and the vertical rods. The bottom end and the middle section of the vertical rod are provided with embedded matching structures which are firmly connected with the bottom plate and the limiting plate, and stable supporting is provided. The connecting rods are connected with the two rows of vertical rods in the middle, the overall rigidity of the frame structure is further enhanced, and detachable constraint on the limiting plates is formed. According to the fence frame, orderly loading and precise positioning of workpieces are facilitated, the workpieces are effectively prevented from being collided or dislocated in the furnace loading process, and the uniformity and quality of heat treatment are improved.

The invention relates to the technical field of electronics, in particular to an installation device and method of a resistor module. The device comprises a resistor box, a mica trough plate, a resistor tape and a fan, a plurality of mica groove plates are arranged in the same plane to form a group, a plurality of groups of mica groove plates are arranged in the resistor box in parallel, a plurality of clamping grooves which are uniformly arranged are formed in the mica groove plates, the clamping grooves are used for fixing the resistance tapes, and a group of resistance tapes is wound between each group of mica groove plates; the fan is arranged at the bottom of the resistor box, and the direction of an air outlet of the fan is perpendicular to the plane where each mica trough plate is located. The high-power load resistor module effectively solves the problems that in the prior art, a high-power load resistor module is large in size and weight, low in power density, insufficient in heat dissipation area and not suitable for installation. The power density and the heat dissipation efficiency of the resistor module are remarkably improved, and meanwhile the installation process is simplified.

The utility model relates to the technical field of ceramic tile production equipment, and discloses a dry granule distribution platform and a dry granule machine, the dry granule distribution platform comprises a platform support, a driving roller, a driven distribution roller, a feeding belt and a distribution driving mechanism, the diameter of the driven distribution roller is smaller than that of the driving roller, and the driven distribution roller is located at the downstream of the driving roller; the platform support is provided with a straightening structure located behind the driven material distribution roller, and the straightening structure is used for maintaining the straightness of the driven material distribution roller. The straightness of the small-diameter driven material distribution roller is maintained by arranging the straightening structure, the consistent tightness of the feeding belt in the operation process is guaranteed, the speed difference of dry particles caused by different tightness degrees of the feeding belt is avoided, the problem that the dry particles are not uniformly distributed on the feeding belt is solved from the source, and the production efficiency is improved. The distance between each point on the surface of the driven material distribution roller and the feeding belt is kept consistent, so that the dry particles are uniformly extruded and pushed when passing through the material distribution roller, and the material distribution uniformity is further improved.

The invention discloses a production method of a nickel-chromium-iron-based alloy plate. The nickel-chromium-iron-based alloy plate comprises the following components: 0.05-0.08% of C; 0.25 to 0.45 percent of Si; mn: 0.55 to 0.80%; less than or equal to 0.025% of P; s < = 0.005%; cr: 24.5 to 26.0%; ni: 36.0 to 37.5%; 0.30% or less of Cu; 0.55 to 0.65 percent of Nb; 0.10-1.0% of Mo, and less than or equal to 2.5% of residual element W; less than or equal to 0.010% of B; 0.10% or less of Al; 0.10% or less of Ti; 0.15% to 0.60% of [N]; and the balance of Fe and inevitable impurities. The rolling technology comprises the steps of electric arc furnace smelting, AOD refining, LF refining, die casting, surface cleaning, heating, first-heating-number rolling, dead head cutting, surface cleaning, second-heating-number rolling, third-heating-number rolling, forming rolling, water cooling, surface cleaning, solid solution heat treatment and acid pickling. According to the nickel-chromium-iron-based alloy plate and the preparation method thereof, on the basis of optimizing components, reasonable smelting, rolling and heat treatment processes and a short-process nickel-chromium-iron-based alloy plate production process are adopted, so that the production cost is reduced, and better product performance can be obtained.

The utility model discloses an electrolytic bath pole plate and an electrolysis device. The electrolytic cell polar plate comprises a polar plate body and a distribution pipe, the polar plate body is provided with an inlet end and an outlet end, the polar plate body is provided with an overtemperature area, and the overtemperature area deviates from a flowing path of electrolyte from the inlet end to the outlet end; one end of the distribution pipe is communicated with the inlet end, the other end of the distribution pipe extends to the overtemperature area, and the end of the distribution pipe extending to the overtemperature area is provided with diversion holes. According to the technical scheme, the problem that the electrolyte is not uniformly distributed when flowing to each area of the electrolyte polar plate can be solved.

The invention relates to the technical field of battery heating, in particular to a uniform heating battery pack used in a low-temperature environment. In the prior art, non-uniform heating is easily caused by a mode of wrapping a battery cell by a conventional heating film, and the performance and the service life of the battery are influenced. In order to solve the problem, the uniform heating battery pack provided by the invention comprises a battery pack, a conductive part and a heating element, the battery pack is composed of a plurality of battery cells, and each battery cell is provided with a pole. And the conductive piece is electrically connected with the pole of the battery cell. And the heating element is thermally coupled with the conductive part, covers the surface of the conductive part and is used for heating the battery cell through the conductive part and the pole. According to the structural design, heat is quickly and uniformly transferred to each battery cell through the conductive piece and the pole, so that the problem of non-uniform heating of the battery pack in a low-temperature environment is solved, the overall performance of the battery pack is improved, the service life of the battery pack is prolonged, and meanwhile, the working efficiency and reliability of the battery pack in the low-temperature environment are improved.

The invention discloses an aluminum alloy for preparing a train built-in bogie traction rod and a preparation method of the aluminum alloy, and belongs to the technical field of metal material preparation. The preparation method of the aluminum alloy comprises the following steps: (1) respectively heating and melting intermediate alloys such as pure Al, Al-Zn and Al-Mg, and then mixing and stirring to obtain an alloy melt; (2) introducing mixed inert gas and a refining agent from the bottom of the alloy melt, then continuously introducing the inert gas, and removing surface scum; (3) degassing the alloy melt treated in the step (2), and sintering in a pulsed magnetic field environment; and (4) after sintering is finished, cooling is conducted, plasma treatment is adopted in the cooling process, then casting is conducted after continuous cooling, and the aluminum alloy casting blank is obtained. Through the constructed preparation method, the defects in the alloy can be effectively reduced, the diffusion effect of atoms in the alloy is promoted, the phenomenon of uneven distribution of structures in the alloy is improved, and the service performance of the alloy is improved.

The application discloses a kind of solid supported copper-based N-heterocyclic carbene catalytic materials and preparation method and application thereof, and it is related to material synthesis technical field.The preparation method of the catalytic material includes: cuprous oxide is reacted with N-heterocyclic carbene ligand containing bromine group in solvent, and copper-based N-heterocyclic carbene complex is formed;The complex is subjected to Sonogashira coupling reaction with alkyne compound under the action of catalyst, and bromine group on the complex is coupled with alkyne compound and occurs copolymerization, forms porous organic polymer skeleton, and copper-based N-heterocyclic carbene complex is distributed in the skeleton, and solid supported copper-based catalytic material is obtained;Wherein alkyne compound is selected from 1,3,5-triethynylbenzene or 1,3,5-tri (4-ethynylphenyl) benzene.The obtained catalytic material has porous organic polymer skeleton, and copper active species is uniformly distributed in the whole material, belongs to heterogeneous catalytic material, is easy to separate and recycle, can be recycled, and shows excellent catalytic performance in alkyne alkylation reaction of trifluoromethyl ketone.

This utility model discloses an integrated device for testing the number of uses of anti-fog cloth, relating to the field of anti-fog cloth technology. It aims to solve the technical problem of uneven surfactant distribution on the glass sheet caused by full-coverage wiping with anti-fog cloth, resulting in insufficient accuracy of test results. The device includes a housing with a partition in the middle. From left to right, cavities A, B, C, and D are arranged on the front surface of the partition. A wiping mechanism A is arranged in cavity A, and a testing mechanism is arranged in cavity B. This utility model optimizes the design of the bushing and shaft structure. A drive motor drives the bushing to rotate via gear set A, which in turn causes the lower housing B to rotate synchronously. Simultaneously, the meshing transmission of gear set B causes the reciprocating screw to move the wiping plate radially within the housing. This allows the anti-fog cloth to move in a radial spiral trajectory as the housing rotates, achieving comprehensive and uniform wiping of the glass sheet surface and improving the problem of uneven surfactant distribution in traditional wiping methods.

The embodiment of the invention provides an electrolyte ice ball jet machining system and method. Comprising a rack provided with a clamping device used for clamping a workpiece, a spraying device used for spraying a solid electrolyte to the workpiece, a power supply device connected to the spraying device and the workpiece, an electrolyte freezing device used for freezing a liquid electrolyte into the solid electrolyte, and a driving device used for driving the spraying device to move relative to the workpiece, the electrolyte freezing device is arranged on the electrolyte pipeline, the electrolyte pipeline is connected with the spraying device, and the driving device is arranged on the rack. According to the embodiment of the invention, the solid electrolyte is adopted for jet machining, so that the problem of non-uniform Gaussian current distribution on the surface of the workpiece in traditional electrochemical jet machining can be effectively improved, and the machining precision is remarkably improved.

This utility model relates to the field of automotive lighting technology, and more particularly to an optical system for improving illumination uniformity, and automotive lights and vehicles using the same. The optical system for improving illumination uniformity includes a collimator that collimates light emitted from a light source, and the collimator includes at least one collimating unit; and a light commutation unit, including at least one set of light commutation units, each light commutation unit including an incident light unit and an exiting light unit. The incident light unit converges light from the collimator, and the exiting light unit is composed of multiple refractive surfaces, with the light cone angle formed by the light rays passing through the ends of each refractive surface being approximately equal. This optical system for improving illumination uniformity achieves light emission through multiple refractive surfaces. Because the light cone angle of each refractive surface is approximately equal, it can weaken the contrast between light and dark areas, thereby improving uneven light distribution and enhancing illumination uniformity.

The utility model discloses an inner fire cover and combustor. The inner fire cover, including inner fire cover body, the upside of inner fire cover body is equipped with the wok -frying fire hole, the lower part of inner fire cover body is equipped with wok -frying gas cavity, wok -frying gas cavity with wok -frying fire hole intercommunication, be provided with the splitter plate in wok -frying gas cavity, be equipped with main gas through -hole and gas shunt through -hole on the splitter plate, the middle part of main gas through -hole is equipped in the splitter plate, the outer side of main gas through -hole is equipped with gas shunt through -hole, the area of main gas through -hole is S1, the area of gas shunt through -hole is S2, S1 > S2. The utility model provides an inner fire cover, can improve the problem of uneven flame distribution, and make the flame center distribution simultaneously.