32results about How to "Change distribution status" patented technology

The invention provides an inflatable automobile which is characterized in that the lift force is eliminated by changing the fluid distribution state between the upper part and the lower part of an automobile to change the traditional method that the automobile overcomes the lift force by the weight in hundred years, and therefore, the weight factor does not need to be considered. The bodywork of the automobile is made of light materials; for example, the inflatable layer of the inflatable automobile can be integral or local and can be an outer layer or an inner layer, and meanwhile, a lead-in opening is communicated with a fluid passage, which can greatly reduce the fluid resistance when the automobile runs. In the inflatable automobile which is the lightest in the world, due to the fact that a path through which the fluid of the lower part of the automobile flows is longer than the upper part, and thereby, the pressure of the upper part of the automobile is slightly higher than that of the lower part, and like an invisible hand stably presses the shell of the upper part of the automobile; and compared with the traditional automobiles, the inflatable automobile is more stable and saves more energy when running at high speed. Because the bodywork is the inflatable layer, when an accident happens unfortunately, the self safety is ensured, and meanwhile, the safety of hit automobiles or pedestrians is also increased, the inflatable automobile saves the most energy in the world and is extremely safe.

The invention discloses a chemical-resistant and scratch-resistant polypropylene composite material which is prepared from the following ingredients in parts by weight: 55 to 80 parts of polypropylene, 8 to 12 parts of polyethylene and 0.5 to 2 parts of carbon black, wherein the polyethylene is at least one of extrusion-grade high-density polyethylene and injection-molding-grade high-density polyethylene, the density of the polyethylene is 0.948 to 0.965g/cm<3>, and the melt mass flow rate of the polyethylene is 0.1 to 12g/10min. In the polypropylene composite material disclosed by the invention, all the ingredients and contents interact with each other; meanwhile, the polyethylene and the carbon black are reasonably chosen, so that the polypropylene composite material has good comprehensive performance of chemical resistance and scratch resistance, keeps very good mechanical property at the same time and is especially suitable for being applied to automotive upholsteries. Meanwhile, the invention further discloses a preparation method of the chemical-resistant and scratch-resistant polypropylene composite material.

The invention belongs to the technical field of forging technologies, and discloses a forging technology for an abnormal structure of a TC18 titanium alloy raw material. The forging technology comprises the following steps: a, carrying out beta forging above a phase change point on blanks by 1-2 fire, wherein forging temperature is 15-30 DEG C above the phase change point, and deformation is controlled to be between 20% and 40%; b, carrying out forging below the phase change point on the blanks by more than 2 fire, wherein the forging temperature is 20-40 DEG C below the phase change point, and the deformation is controlled to be between 15% and 30%; and c, carrying out beta forging above the phase change point on the blanks by 1 fire, wherein the forging temperature is 10-20 DEG C above the phase change point, and the deformation is controlled to be 15% and 25%. By the technology, the structure defect of fine-crystal bright bands can be avoided effectively, and TC18 titanium alloy free forge pieces can be produced in batches.

The invention discloses a method for improving the quality of an Al-Cu dissimilar metal friction stir welding butt joint. The method specifically comprises the steps that the edges of butt-joint sidesof an aluminum welding part and a copper welding part used for welding are firstly machined into engaged sawtooth sides, then the welding parts on the two sides are in butt joint along the sawtooth sides, and then friction stir welding is carried out. The treatment method is simple, only simple machining is needed, and cost is low; welding seam forming of Al-Cu dissimilar metal friction stir welding can be obviously improved, and the metal mixing degree and the plastic flow behavior of Al-Cu dissimilar metal in the welding process are improved; and meanwhile, the area of an Al-Cu welding interface is increased, the bearing capacity of the joint is increased, the distribution state of a brittle IMC along the interface is changed, and the mechanical performance of the joint is obviously improved.

The invention belongs to the field of composite coating preparation, and particularly relates to a preparation method of a corrosion-resistant antibacterial and anti-biofouling multifunctional metal-based protective coating. Through the method, firstly, nano-silver is formed on a graphene oxide-OH functional group through a chemical reaction in an in-situ synthesis mode, and graphene/nano-silver composite powder is obtained through reduction; secondly, the graphene/nano-silver composite powder and metal powder are ball-milled, metal/graphene/nano-silver composite powder is formed, and then stress relief annealing is conducted under inert gas protection; and finally, the composite powder is deposited into the protective coating through a cold spraying technology. Through the method, by adjusting the chemical reaction conditions, the particle size distribution of the metal powder, the weight ratio of metal/graphene/nano-silver and the ball-milling time, the distribution state of the graphene/nano-silver in the metal-based composite coating is changed, and thus the multifunctional metal-based protective coating with good corrosion resistance, antimicrobial property and biofouling property is prepared.

The invention discloses composite CuNiIn powder, a preparation method and an application thereof. The composite CuNiIn powder comprises a dispersion strengthening phase and a self-lubricating phase. The preparation method comprises the following steps that ball milling and mixing on In powder, nickel-coated molybdenum disulfide powder and A12O3 dispersion strengthening Cu powder are carried out soas to prepare mixed raw materials; a spray drying granulator is adopted to carry out centrifugal atomization granulation on the mixed raw materials to prepare dried granules; and vacuum sintering iscarried out on the dried particles, and then the dried particles are crushed and screened to obtain the composite CuNiIn powder. The composite CuNiIn powder can be prepared into a composite CuNiIn coating containing the dispersion strengthening phase and the self-lubricating phase by adopting a thermal spraying method. The distribution state of the self-lubricating phase is changed, the strength and the toughness of the coating are improved, the generation of micro-cracks of the coating is effectively avoided, the self-lubricating service life of the coating is prolonged, and the composite CuNiIn powder has a good application value in the industries of aviation engines, gas turbines and the like.

The invention discloses a forklift fork, which comprises a vertical part, a horizontal part and a fork tooth arranged at the front end of the horizontal part, the forklift fork is made of steel material, and the steel material is mainly composed of C, Si, B, Cr, Ti, Cu, Mn, Ni, Al, Mg, Nb, V, rare-earth elements, S, P, the balance of Fe and inevitable impurities. A preparation method of the forklift fork includes the following steps: the materials are first prepared into the steel meeting requirement, a needed section is then cut out, so that a rough blank I is obtained, the rough blank I then undergoes medium-frequency heating pretreatment and is then bent into the vertical part and the horizontal part of the forklift fork until an included angle Alpha is formed between the vertical part and the horizontal part of the forklift fork, and after back sawing, head cutting, sleeve welding, grinding, ultrasonic flaw detection, heat treatment, primary shot-blasting grinding, corrective grinding and secondary shot-blasting grinding, the forklift fork is obtained. The properties of the forklift fork produced by the invention, such as strength, toughness, wear resistance and weldability, are good, the safety coefficient is high, and the service life is long.

The invention discloses a spraying method of a graphene coating, and relates to the spraying method of coatings. The spraying method comprises the specific steps that an ultrasonic vibration source 7is arranged on a to-be-sprayed workpiece B5, and ultrasonic frequency is 30 KHz to 1000 KHz; after the step, the graphene coating is uniformly sprayed to the surface of the workpiece B5, the ultrasonic vibration source 7 vibrates for 20 min to 30 min, and a coating layer B6 is waited to be dried; and the graphene coating is generally dried. According to the spraying method, during the spraying process, ultrasonic vibration energy is applied to the sprayed workpiece, graphene microchips in the coating in a viscous flow state are gradually extended and are spread on the surface of the workpieceunder action of ultrasonic vibration, the distribution state of the graphene microchips of the coating is changed, and corrosion resistance is improved.

The invention discloses an efficient supported bimetallic or polymetallic catalyst and a preparation method thereof, the efficient supported bimetallic or polymetallic catalyst is prepared by equivalent-volume impregnation. The method is characterized in that a dielectric barrier discharge plasma technology, as a new green technology operated at low temperature, can change the distribution state of metals in the bimetallic or polymetallic catalyst on a carrier very well, so that a special structure with one or more metals enriched on the surface of the catalyst and other one or more metals enriched in the inner part of the catalyst can be formed. The method can have a positive impact on the surface composition, structure, size and catalytic performance of the catalyst, and can significantly improve the activity, stability and effective product selectivity of the catalyst. The method is suitable for strengthening the preparation of various supported catalysts loaded on different materials. The method using a dielectric barrier discharge plasma for strengthening the preparation of the catalysts has the advantages of short preparation time, low energy consumption and environment friendliness.

The invention belongs to a powder material grinding device, in particular to a magnetic powder grinding device, comprising a grinding tank, a grinding body and a grinding base, wherein the grinding tank, the grinding body and the grinding base together form a grinding chamber; the grinding body can be driven by an external motor to grind along the The axial movement and rotation of the tank; the grinding tank is a conductor and connected to an external alternating current generator. It can realize the dispersion of magnetic powder in the grinding process and realize the uniformity of grinding.

The invention discloses a process for preparing a silver tin oxide contact material through a powder rolling method. The process specifically comprises the following steps: rolling mixed powder of silver oxide into a flaky material with thickness of 0.1-0.6 mm through a rolling mill, and carrying out isostatic pressing, sintering and extruding the obtained flaky material to obtain the silver tin oxide contact material; the diameters of rollers of the rolling mill are 60-200 mm, the gap between two rollers is 0.1-0.6 mm, and the rolling speed is 2-10 m/min. According to the process disclosed by the invention, powder rolling technology is introduced into the conventional powder metallurgic method of preparing silver tin oxide, the mixed powder of silver oxide is rolled by the rolling mill to change the simple distribution state of silver particles and tin oxide particles in the conventional powder metallurgic process, and the tin oxide particles are pressed into the silver particle matrix so as to perfect the bonding strength of silver and tin oxide in the material and improve the mechanical and physical properties and electrical properties of the obtained silver tin oxide contact material.

The invention discloses a microwave oven. The microwave oven comprises a microwave oven body, a performance-adjustable frequency selection surface is arranged in the microwave oven body, the frequency selection surface is close to the side wall in the microwave oven body, and a cavity in the microwave oven body is divided into a heating area and an electric field boundary change area by the frequency selection surface. The control system on the adjustable frequency selective surface is connected with a controller of the microwave oven body; and a to-be-heated object containing table and a power input port are arranged in the heating area. The frequency selective surface is applied to the microwave oven, and the frequency selective surface is in a transmission or reflection state for microwaves by periodically changing the filtering characteristic of the frequency selective surface, so that the boundary of a microwave field is changed, the distribution state of an electric field in the microwave oven is changed, and the purpose of improving the heating uniformity is achieved.

The invention relates to an inert anode material for aluminum electrolysis and preparation method. The inert anode material comprises NiFe2O4 ceramic phase, Ag powder or/and Cu powder metallic phase and fiber phase, characterized in that adding MnO2, V2O5 in the ceramic phase, adding carborundum fibre, carbon fiber, boron fibre, silicon nitride fibre in the fibre phase. In the NiFe2O4 ceramic phase, the NiO and F2O3 is taken as raw material, synthesizing NiFe2O4 spinel according to stoichiometric ratio, NiO excessive 15wt%; based on total mass of NiO and Fe2O3, adding at least one of 0.5wt% to 2.5wt% MnO, 1.0wt% to 3.0wt% V2O5 to compose NiFe2O4 spinel base material; after the NiFe2O4 spinel base material is smashed and screened, processing grain size distribution according to crude grainmaterial, mediate grain material and fined powder material. Based on the total mass of the NiFe2O4 spinel base material, adding at least one of 5wt% to 15wt% Ag powder, 5wt% to 30wt% Cu powder, than further adding at least one of 0.5wt% to 5wt% carborundum fibre, 0.5wt% to 5wt% carbon fiber, 0.5wt% to 10wt% boron fibre, 0.5wt% to 10wt% silicon nitride. The product has higher anti-erosion property, thermal-shock resistance, bend strength and anti-impact strength properties.

The invention provides an extruding wheel of a continuous extruding machine, and relates to the technical field of continuous extruding and continuous coating of nonferrous metals such as copper and aluminum. The extruding wheel is provided with at least one annular groove in the circumferential direction, a plurality of cooling through holes penetrating through the extruding wheel are distributedin the circumferential direction of the extruding wheel, a distance is reserved between the center lines of the cooling through holes and the bottoms of the grooves, the axes of the cooling through holes are parallel to the axis of the extruding wheel or a certain spatial angle is reserved between the axes of the cooling through holes and the axis of the extruding wheel, and a pin hole which doesnot penetrate through the extruding wheel is formed in the end surface of the extruding wheel. According to the extruding wheel, by changing a cooling water channel of the extruding wheel, the temperature distribution and the stress state of the extruding wheel are changed while the temperature of the grooves of the extruding wheel is controlled and the softening of the high temperature areas ofthe grooves of the extruding wheel is relieved, stress value of dangerous damage points of the extrusion wheel is reduced, so that the rotating speed of the extruding wheel can be increased, the production efficiency is remarkably improved, the service life of the extruding wheel and a cavity is prolonged, and the operating cost of equipment is reduced.

The invention discloses a water collector provided with a surface cooling device. The water collector comprises a water collector housing and the cooling device. The cooling device comprises an aluminum alloy top shell, a base, a rechargeable lithium battery, a rectangular thin-walled water pipe, a circulating water pump, a refrigerating device, a micro temperature control board and a micro boosting chip, wherein the aluminum alloy top shell is attached to the surface of an inner cavity of the water collector housing, the rectangular thin-walled water pipe is laid on the inner surface of the aluminum alloy top shell in a coiled state, and the two ends of the rectangular thin-walled water pipe are connected with the circulating water pump and the refrigerating device respectively to form aclosed cooling circulation loop; a plurality of temperature sensors are arranged on the inner surface of the aluminum alloy top shell, and the micro boosting chip, a cooling fan and the temperature sensors are connected with the micro temperature control board. By means of the water collector, the water collecting effect of a super-hydrophobic surface can be improved; the surface temperature of the water collector housing is reduced through an internal micro refrigerating system to achieve the effects of reducing the temperature of the super-hydrophobic surface, increasing the temperature difference and improving the water collecting effect.