34results about How to "Effective resizing" patented technology

The invention provides a tungsten carbide hard face abrasion-resistant bearing. The tungsten carbide hard face abrasion-resistant bearing is composed of a hard alloy and a coating distributed on the periphery of the hard alloy; the coating is prepared from the following components, by volume percentage, 20%-55% of pure nickel or a nickel-based alloy, 2.5%-15% of a self-lubricating component, and 30%-77.5% of tungsten carbide particles; and the self-lubricating component is a nickel-coated molybdenum disulfide composite material or a nickel-coated graphite composite material. The invention further provides a preparation method of the tungsten carbide hard face abrasion-resistant bearing. According to the provided tungsten carbide hard face abrasion-resistant bearing, due to the existence ofthe lubricating component (such as graphite) in the coating, the friction coefficient of the surface of the hard face is lowered, and the abrasion performance can be effectively improved; and the lubricating component such as graphite is in three-dimensional uniform distribution, and can uninterruptedly occur on the new formed surface under the condition of initial surface abrasion, and thereforea self-lubricating effect is achieved.

The invention relates to a preparation method of a thermoplastic polyurethane micro-airbag elastomer material, which comprises the following steps: (1) feeding liquid raw materials such as diisocyanate molecules and solid additives into a twin-screw reactor to carry out polymerization chain extension reaction to obtain high molecular weight (2) Push the high molecular weight hot melt into the mixing extruder to continue the reaction to generate a high molecular thermoplastic polyurethane melt; (3) continue to combine the obtained high molecular thermoplastic polyurethane melt with the polymer Pellets, etc. are added to the foaming extruder, and then extruded from the die head to the underwater pelletizing chamber in the form of high-pressure hot melt; (4) The pellets are carried by the process water and sent to the separation process through the multi-stage pressure release and expansion process water pipeline. Machine place, after separation, screening and drying, the target product will be formed. Compared with the prior art, the present invention can directly produce thermoplastic polyurethane elastomer materials from liquid raw materials such as MDI, which greatly reduces energy consumption and material consumption, and improves product yield and production efficiency.

The invention relates to a high-concentration Re / Ru nickel-based single crystal superalloy with high temperature bearing capacity and high creep resistance, and belongs to a new material for special purposes. The nickel-based superalloy comprises the following components of, in percentage by mass, 5.4-6.2% of aluminum, 7.2-7.8% of tantalum, 2.6-3.5% of chromium, 1.7-2.5% of molybdenum, 4.2-4.8% ofcobalt, 4.2-5.0% of tungsten, 5.8-6.4% of rhenium, 4.7-5.4% ruthenium, 0.07-0.12% of hafnium and the balance nickel. The preparation method of the nickel-based superalloy comprises a heat treatment process. The single-crystal nickel-based alloy has high temperature bearing capacity, good high-temperature mechanical property and creep property, good creep strength and long service life under the ultrahigh-temperature condition, and is a nickel-based single-crystal superalloy suitable for producing blades of hot end parts of high-thrust-ratio aero-engines and gas turbines.

The invention belongs to the technical field of enameled wires, in particular to a felt painting device and enameled wires. The present invention coats two varnishing units of the insulating layer on the surface of the magnetic wire by a felt varnishing device, and an adjusting column unit for adjusting the spacing. The advantage is that the adjusting column unit can effectively adjust the spacing between the two varnishing units. Wires with different specifications have good painting effects and high adaptability. At the same time, multiple snapping structures are designed, which can effectively adjust the size of the distance between two painting units and fix them.

The invention provides a heating anti-overload control method and device of an air conditioner and the air conditioner, and relates to the technical field of air conditioners. The method comprises thesteps of: continuously detecting the temperature of an indoor heat exchanger coiler during heating; controlling an operation state of an outer fan according to the temperature of the indoor heat exchanger coiler, a preset first numerical value and a preset second numerical value; judging if a compressor is overloaded for tripping; and correcting the first numerical value when judging that the compressor is overloaded for tripping. The method judges if an air conditioning system is located in a high-load state through detection if the compressor is overloaded, so that a parameter set value oftriggering the outer fan to stop operation is corrected, the start and top protection timeliness and effectiveness of the outer fan are guaranteed, the frequent overload tripping of the compressor isprevented, and the heating anti-overload control of the air conditioner is realized.

A method for burning gasified semi-coke particles by concentrated-dilute and coarse-fine deep separation and controlled vortex stable combustion technologies is characterized in that low-rank coal primary air semi-coke powder flow carrying gasified semi-coke is subjected to concentrated-dilute separation to obtain concentrated-phase semi-coke powder flow and dilute-phase semi-coke powder flow; the concentrated-phase semi-coke powder flow is subjected to coarse-fine separation to obtain concentrated-phase coarse semi-coke powder flow and concentrated-phase fine semi-coke flow; the dilute-phase semi-coke powder flow and secondary air are mixed, and the mixture is guided into an outer-layer nozzle of a combustion chamber; and the concentrated-phase fine semi-coke powder flow and the concentrated-phase coarse semi-coke powder flow are guided into an inner-layer nozzle and an intermediate-layer nozzle of the combustion chamber respectively and then sprayed into the combustion chamber, a controlled vortex bluff body device and an auxiliary aeration secondary air nozzle are mounted in the inner-layer nozzle of the combustion chamber, and during ignition, the concentrated-phase fine semi-coke powder flow sprayed by the inner-layer nozzle of the combustion chamber is ignited at first. The method can effectively improve ignition, combustion and burn-out characteristics of gasified semi-coke, reduces pollutant discharge and can effectively prevent a furnace wall from slag-bonding and a water wall from high-temperature corrosion.

The invention relates to a thermoplastic micro-airbag polymer elastomer material and a preparation method thereof. The thermoplastic micro-airbag polymer elastomer material includes the following components in weight percentage: supporting skeleton polymer material 0.1-97%, pressure-resistant and slow-rebound 0.1-97% of the polymer material, 0.01-0.5% of the nucleating agent, and 0.1-10% of the foaming agent; the supporting skeleton polymer material is a polymer material with high molecular weight, high hardness, high crystallization or high polarity, so The pressure-resistant slow-rebound polymer material is a low molecular weight, low hardness, low crystallization to amorphous, low polar / non-polar polymer material corresponding to the supporting skeleton polymer material. Compared with the prior art, the polymer elastomer material prepared by the present invention has an intertwined network formed by the micro-airbag structure and open cells to form an interpenetrating structure, excellent material properties such as resilience, neat cushioning and feedback, and a sense of touch and comfort. High, controllable expansion ratio, etc.

The invention discloses a preparation method of dendritic macromolecule reinforced graphene oxide paper with holes, and belongs to the technical field of graphene oxide production. The invention aimsto solve the problems of low tensile strength and stress relaxation of a graphene oxide film / paper material and low quality of the finally prepared material due to impermeability of lamellas and the like. An epoxy functional group and adjacent carbon atoms thereof are eroded in a graphene oxide sheet layer through the strong oxidizing property of hydrogen peroxide to form nanoscale holes; polyamide-amine (PAMAM) dendritic polymer is introduced to form covalent cross-linking among graphene oxide sheet layers to improve the interlayer bonding strength of the graphene oxide; and finally, a graphene oxide film / paper material with relatively high strength and relatively good quality is obtained by means of directional filtering. The method is simple to operate, low in cost and high in efficiency, and is expected to realize large-scale preparation.

The invention relates to the technical field of wrought magnesium alloys, and specifically provides a method for regulating and improving the grain structure of ZK60 wrought magnesium alloys. The method of the invention comprises that after the ZK60 wrought magnesium alloy to be treated is subjected to solid solution treatment, the stepwise heating and pre-aging treatment is carried out, and then the extrusion treatment is carried out. This method can effectively control the grain size of ZK60 magnesium alloy by adding stepped pre-aging treatment, significantly improve the strength and plasticity of the material, fully exploit the advantages of low density and high specific strength of ZK60, and realize the promotion and application of ZK60 magnesium alloy in new energy buses. And the core problem of the lightweight goal of automobiles, laying the foundation for the promotion and application of ZK60 magnesium alloy in new energy buses.

The invention belongs to the field of metamaterial structures, in particular to a polarization-insensitive tunable electromagnetically induced transparent terahertz device. The device is composed of a substrate, a graphene layer, a metal layer and a metal electrode; the substrate includes a silicon layer and a silicon dioxide layer covering the silicon layer; the graphene layer covers the upper surface of the silicon dioxide layer , and the graphene layer is composed of periodically arranged graphene frame structures; the metal layer covers the upper surface of the silicon dioxide layer, and the metal layer is composed of periodically arranged cross-shaped metal unit structures; One electrode of the metal electrode is arranged at the edge of the graphene layer and connected with the graphene layer, and the other electrode is arranged at the edge of the silicon layer and connected with the silicon layer. The invention can realize electromagnetically induced transparency and generate slow light effect. The invention can realize the regulation of the transmission characteristics and slow light effect of metamaterial devices by applying external bias voltage, and effectively adjust the size of the group delay.

The invention discloses a preparation method of Fe-Si-Al soft magnetic material with high microwave magnetic permeability, which belongs to the field of high-frequency magnetic performance magnetic materials. The present invention includes the following steps: 1) 100-mesh Fe-Si-Al raw powder is sieved through 100-mesh, 200-mesh, and 300-mesh sieves in turn, and the 75 μm-150 μm powder is called A type powder, and the 48 μm-75 μm powder is called B type. Powder; the mass percent of the Fe-Si-Al raw powder component is: Fe: (82.6-x-y)%, Si: (10.3+x)%, Al: (7.1+y)%, |x|≤ 0.7, |y|≤1.7; 2) Flake treatment, control the average particle size / thickness ratio of the powder between 14 and 26; 3) Remix according to the mass ratio of Class A: Class B = 0.5 to 2 to obtain high Microwave permeability soft magnetic alloy powder. The invention has simple process and convenient operation, and the Fe-Si-Al alloy powder is sieved before mechanical ball milling, which can improve its microwave magnetic permeability, and can greatly increase its microwave magnetic permeability if it is further processed into flakes.

The invention belongs to the technical field of sodium ion electrode materials, and in particular relates to a sodium storage hard carbon negative electrode based on an intercalation-electroplating hybrid mechanism and a preparation method thereof. The design of this application adopts ionic liquid (low temperature molten salt) electroplating method to directly plate Ag, Cu and other sodium-friendly metal nanoparticles on the hard carbon film electrode to achieve uniform deposition of sodium metal negative electrode, and finally obtain high-capacity and high-stability intercalation ‑Electroplated hard carbon based sodium storage negative electrode. The biggest feature of the ionic liquid used in this application is the absence of H + , can prevent the electrode template from falling off when it comes into contact with water, and its electrochemical window is as high as 2.23 V. The application temperature is low, energy-saving and non-toxic and green, and more importantly, it can effectively adjust the size of metal particles, and it can be used as a sodium metal negative electrode material. out of excellent performance.

The invention relates to a thermoplastic micro-airbag polyurethane elastomer material with microparticle size and a preparation method thereof. The polyurethane elastomer material includes the following components in weight percentage: supporting skeleton polymer material 1-97%, pressure-resistant and slow-recovery Elastic polymer material 1-97%, nucleating agent 0.01~0.5%, blowing agent 0.1~10%; it is made by the following method: (1) polymer raw material and nucleating agent are fed from the front end of twin-screw extruder The feeding port is fed, and the foaming agent is fed from the feeding port in the middle section, so that all raw materials are hot-melted and mixed fully, and then enter the static mixer for further homogenization, and then are pressure-controlled and quantitatively transported by the melt pump; (2) The hot melt sent out by the melt pump enters the underwater pelletizing chamber through the die head to be pelletized, and is taken out by the process water for separation, and the obtained pellets are screened and dried to obtain the target product. Compared with the prior art, the product of the present invention has an intertwined network airway interpenetrating structure formed by a suitable micro-airbag structure and moderate open cells, and the particle size can be effectively controlled at about 0.5-2mm.

The invention discloses a control method for delay jitter removal based on a TCP live broadcasting system. The control method comprises the steps of: judging whether a current buffer region is empty; if not, shortening the data duration of the current buffer region when a current adjustment period arrives and if a difference between the maximum buffer region data duration and the minimum buffer region data duration in the current adjustment period is smaller than a preset buffer region duration jitter threshold and the minimum buffer region data duration is greater than a preset minimum buffer region duration threshold; if the current buffer region is empty, enlarging an initial buffer region data duration when the empty buffer region receives a first data packet, wherein the enlarged initial buffer region data duration is an increasing function of a second biggest delay jitter value, the initial buffer region data duration is the buffer data duration needed by the buffer region from being empty to play-recovering, and the second biggest delay jitter value is a second biggest value of time differences of reception of two continuous data packets from a period of time before the buffer region is empty to the time when the first data packet is received.

The invention relates to a degradable antifouling thermoplastic micro-airbag polymer elastomer material and a preparation method thereof. The preparation method specially comprises the following steps: (1) feeding a polymer raw material, a nucleating agent and an environment-friendly degradable organic perfluorinated material from a feed opening in the front end of a twin-screw extruder, feeding afoaming agent from a feeding opening in the middle section of the twin-screw extruder, after all the raw materials are hot-melted and mixed sufficiently, feeding the mixture into a static mixer for further homogenizing, and then performing pressure control and quantitative transporting by a melt pump; and (2) enabling a hot melt pumped out from the melt pump to enter an underwater granulating chamber for granulating through a die head, separating the granulated hot melt from process water, and screening and drying the obtained particles, thereby forming a target product. Compared with the prior art, the performances of the antifouling property, the dirt resistance, the oil resistance, the contamination prevention property, the aesthetic appearance, and good tactile impression of the material can be effectively realized, and the degradable antifouling thermoplastic micro-airbag polymer elastomer material is especially suitable for being applied in the fields such as shoe materials andfood package.