25results about How to "Extend service time" patented technology

The invention discloses an aero-engine silicon carbide ceramic matrix composite part crack damage repairing method which comprises the following steps: removing an environmental barrier coating on the surface of a part, cleaning and drying; powdery active metal brazing filler metal and a connecting agent are selected to be mixed and then coated on cracks and nearby areas on the surface of the part; vacuum brazing, weld joint polishing, cleaning and drying are conducted; preparing a bonding layer and a middle layer of the environmental barrier coating by using atmospheric plasma spraying equipment, and preparing a surface layer of the environmental barrier coating by using a plasma-physical vapor deposition method; and the environmental barrier coating is polished, annealing treatment is conducted, and crack damage repairing of the silicon carbide ceramic matrix composite part of the aero-engine is completed. According to the vacuum brazing process, the strength of the base material can be effectively recovered by 50%-60%, the usable time of the base material is prolonged, parts can continue to serve, and the parts are prevented from being scrapped in advance; in addition, according to the EBC coating preparation technology, the porosity of the coating can be reduced, and therefore the service time of the repaired part is further prolonged.

The invention relates to the technical field of concrete preparation, in particular to moisturizing anti-cracking high-ductility concrete and a preparation method thereof. The moisturizing anti-cracking high-ductility concrete is prepared from the following components: 350 to 450 parts of ordinary Portland cement, 200 to 300 parts of fly ash, 30 to 50 parts of silica fume, 250 to 350 parts of quartz sand, 0.5 to 1 part of a water reducing agent, 10 to 20 parts of an expanding agent, 0.1 to 0.3 part of a retarder, 0.5 to 1 part of a thixotropic lubricant, 0.2 to 0.7 part of a modified nano material, 0.7 to 3 parts of a modified composite curing agent, 5 to 10 parts of an anti-cracking agent, 5 to 12 parts of polymer fiber and 180 to 220 parts of water. The high-moisture-retention high-water-retention concrete has the characteristics of high moisture retention and high water retention, is beneficial to maintaining the internal humidity balance, reducing cracks generated by drying shrinkage, improving the durability of the concrete, and remarkably reducing the cracking risk of the concrete in the hardening process, so that the concrete structure is more complete, the safety of the structure is improved, and the service life of the structure is prolonged.

The invention provides modified activated carbon, a preparation method and application of the modified activated carbon in treatment of methyl mercaptan in sewage, and the preparation method comprises the following steps: crushing, screening, washing and drying an activated carbon material to obtain activated carbon particles; the preparation method comprises the following steps: dipping active carbon particles in a urea solution or a melamine solution, transferring the active carbon particles into a reaction kettle, carrying out a hydrothermal reaction, stably doping a nitrogen element into the active carbon, after the reaction is finished, washing a product obtained by the reaction to be neutral, drying, and carrying out heat treatment in a nitrogen atmosphere to obtain modified active carbon; in the preparation method provided by the invention, the physical and chemical properties of the activated carbon are optimized by adjusting the reaction conditions of the nitrogen doping process and the heat treatment process, such as the impregnation concentration, the impregnation time, the heat treatment temperature and time and the like, so that the modified activated carbon with the capacity of efficiently purifying the methyl mercaptan is obtained, and the adsorption capacity on the methyl mercaptan can reach more than 300mg / g; compared with unmodified activated carbon, the modified activated carbon is improved by 60% or above. The adsorption efficiency of the modified activated carbon on methyl mercaptan is greatly improved.

The invention discloses self-repairing wear-resistant coating raw material powder and a preparation method of a coating. The method comprises the following steps: 1, carrying out spray granulation on Mo and AlPO4 powder to obtain Mo-AlPO4 powder; 2, the Mo-AlPO4 powder and the AT40 powder are subjected to ball milling, and raw material powder is obtained; the preparation method of the coating comprises the following steps: 1, pretreating the substrate; 2, preheating a substrate and preparing a coating; and 3, hole sealing, polishing and grinding. According to the method, the AlPO4 powder is coated with the Mo powder with the high melting point, so that the AlPO4 powder is not decomposed and damaged at the thermal spraying high temperature and is uniformly distributed in the coating; the raw material powder releases AlPO4 in the process that Mo on the shell is corroded, the AlPO4 reacts with Al2O3 and corrosive liquid to generate Al (PO3) 3 to seal pores, the self-repairing effect is achieved, meanwhile, Mo serves as a bonding phase to improve the bonding strength between coatings and cooperatively improve the wear resistance and corrosion resistance of the coatings, and the coating is suitable for the field of engineering parts.

The invention discloses a wear online identification and compensation control system and method for a high-pressure distribution plunger and barrel assembly, and the system comprises a data collection module which is used for collecting working condition data and state data; a health state dynamic baseline model obtained through offline training is arranged in the data processing module, and the wear level of the plunger and barrel assembly is recognized by calculating the residual error between actual state data and health state data predicted by the model under the current working condition; and the compensation control module is used for generating a self-adaptive compensation control instruction according to the identified wear grade and the current working condition and sending the self-adaptive compensation control instruction to an execution mechanism. According to the method, the dynamic base line synchronous with the real-time working condition is constructed, early weak wear characteristics can be separated from strong working condition interference, the recognition sensitivity and accuracy are improved, the influence of wear on the system performance is actively counteracted through closed-loop adaptive compensation control, the service life of equipment is expected to be prolonged, and the system performance is improved. And technical support is provided for predictive wear monitoring management.

An electrolytic bath anode relates to the technical field of electrolytic bath appliances and comprises a base, the anode is inserted on the base, and the insertion end of the anode is provided with a conical expansion section. The problems that in the prior art, the anode corrosion rate is increased due to the high temperature of the base, the carbon content in prepared metal sodium is high, and the operation time of an electrolytic bath is short due to the short service life of the anode are solved.

The invention discloses a coordinated optimization control method based on voltage stability and multi-stack performance consistency, and the method comprises the steps: building a fuel cell voltage recession function through employing a quantitative weighted estimation method according to the influence of traction conditions of different scenes on the voltage recession of a fuel cell, and representing the recession rate of each fuel cell; according to the decline of each fuel cell, adopting an attenuation compensation distribution strategy to distribute the reference fluctuation power of each fuel cell converter in real time, and obtaining the actual output power of each fuel cell converter; based on a dynamic impedance simulation technology, the output power of each converter of a multi-stack fuel cell is coupled with a bus voltage, and the relationship between a droop coefficient and system stability is analyzed to realize autonomous balance of the system; based on the dynamic error correction principle, a multi-dimensional control regulator is adopted to control the system voltage deviation, the system bus voltage stability is ensured, the electric pile performance of the multi-pile fuel cell is kept consistent, the stable and long-life operation of the multi-pile fuel cell system under the complex working condition is met, the robustness is enhanced, and the service time is prolonged.

The present invention discloses a distributed energy management intelligent coordination system based on big data, including a first acquisition module, a second acquisition module, a data model, an execution module and an energy storage module. The first acquisition module is used to collect the electricity consumption, electricity consumption time and electricity load of the electricity user, and the second acquisition module is used to collect the light intensity e1, light time e2, temperature information f, wind intensity g1, wind direction angle value g2 and dust volume h of the power generator. The information collected by the first acquisition module and the second acquisition module is uploaded to the data model by a data terminal. The present invention makes judgments based on the features extracted from the big data model training, and the auxiliary execution module predicts the electricity consumption behavior of each independent electricity user. At the same time, the execution module can also predict the steep increase and steep decrease of photovoltaic power ΔE and wind power ΔG in advance, so as to facilitate the use of the energy storage module to intervene and coordinate in advance to ensure the stability of the entire system power grid.

The present invention discloses an environmental adaptability analysis method for a DC charging pile, comprising the following steps: S1. Analyze and determine the physical structure and electrical structure of the charging pile; S2. Statistically calculate the types and causes of the failures of each physical module constituting the physical structure of the charging pile and each electrical module constituting the electrical structure caused by environmental factors; S3. Perform environmental membership analysis on the physical structure and electrical structure of the charging pile, wherein the membership is respectively expressed as the proportion of each environmental factor causing the failure of each physical module or electrical module, and the sum of the memberships of various environmental factors to the same physical module or electrical module is equal to 1; S4. Perform correlation analysis on the environmental factors of the charging pile and the health of the charging pile by adopting a comprehensive fuzzy evaluation method. According to the analysis results, the charging pile is operated and maintained in a targeted manner to improve its service life.

The utility model discloses an all-metal hydraulic oscillation impactor which comprises a transmission shaft, a transmission sleeve, a spring, a balance sliding sleeve, an outer sleeve, a shaft clamp, a pressing head, a metal sealing ring, a water hammer unit and a lower connector. The method has the effects of high temperature resistance and wear resistance; vibration is reduced through vibration, vibration is prevented through vibration, vibration is stabilized through vibration, random vibration of the drilling tool is restrained, and the working condition of the drilling tool is stabilized; (3) the spring benefit of the drilling tool is reduced by coupling oscillation and impact, and a static drilling tool with stored energy to be emitted is changed into a dynamic drilling tool with instant emission, so that the deformation of the drilling tool is reduced, and the control of a tool surface is strengthened; (4) sliding friction in directional drilling is changed into vibration friction, so that the supporting pressure phenomenon of a drill column is reduced; service life of the drill is prolonged, drilling footage of the drill is increased, and drilling speed is increased. Although the all-metal hydraulic oscillation impactor is complex in structure and high in cost, the all-metal hydraulic oscillation impactor can better meet actual requirements, and is huge in economic benefit and social benefit, high in cost performance and worthy of popularization and application.

The invention discloses a high-pressure-resistant contact material and a preparation method thereof in the technical field of alloys, graphene modified tungsten fibers are doped in the preparation process of conventional copper-tungsten alloys, the mechanical property and thermal shock resistance of the contact material can be enhanced by adding the tungsten fibers, graphene has good electric conductivity and heat conductivity, and the contact material has good electrical conductivity and thermal shock resistance. The breakdown strength of the contact material can be improved, the service time of an electrical contact in a high-voltage working environment can be prolonged, and the stability of a power system is improved.

The invention provides a drill pipe joint wear-resistant belt flux-cored welding wire, which belongs to the technical field of welding materials. The flux-cored powder of the invention comprises the following components in percentage by mass: 20-30% of ferrotitanium, 47-57% of chromium carbide, 4-12% of ferromolybdenum, 4-10% of manganese, 4-10% of ferrosilicon, 2-8% of graphite, 2-8% of ferrovanadium, 1-6% of sodium fluoride, and the balance is iron powder. The raw materials of the flux-cored welding wire include the flux-cored powder. The surfacing alloy obtained by arc surfacing of the flux-cored welding wire provided by the invention not only has good surfacing processability, beautiful weld formation, and a small number of surface pores, but also has high hardness, high wear resistance and good friction reduction, reducing the wear of the wear-resistant belt on the casing.

The invention discloses an asphalt mortar abrasion rule analysis method based on unit area fluorescence density, which comprises the following steps: preparing an arc-shaped test piece, carrying out an accelerated polishing test, observing the fluorescence form of aggregate before and after abrasion by using a fluorescence microscope, and obtaining a fluorescence image; scanning the surface texture of the aggregate before and after abrasion by using a laser texture scanner and obtaining surface texture elevation data; establishing a unit area fluorescence density calculation model, calculating the unit area fluorescence density, and calculating the reduction amount of the thickness of the asphalt mortar on the surface of the aggregate; and drawing a scatter diagram according to the reduction amount of the thickness of the asphalt mortar on the surface of the aggregate and the fluorescence density per unit area, and performing data fitting to obtain a fitting function and a fitting image of the reduction amount of the thickness of the asphalt mortar on the surface of the aggregate and the fluorescence density per unit area, thereby determining a turning point of rapid attenuation of the skid resistance of the pavement. The anti-skid performance of the pavement is researched from the aspect of abrasion of the thickness of the asphalt mortar film, and the optimal maintenance time is determined.

The invention belongs to the field of protective coatings, and particularly discloses a thermal barrier coating surface modification method which comprises the following steps: sequentially forming an alloy layer and an aluminum layer on the surface of a thermal barrier coating to obtain a thermal barrier coating containing a modified coating; the thermal barrier coating containing the modified coating is subjected to heat treatment; the alloy layer contains aluminum and rare earth elements. According to the surface modification method of the thermal barrier coating, rare earth elements are introduced into the alloy layer, so that the in-situ reaction activity of the alloy layer and the surface of the thermal barrier coating is improved, a large number of Al3Zr intermediates with fine and uniform crystal grains are generated in the alloy layer, the interface energy caused by the in-situ reaction is reduced, complete coating is formed on the surface of the thermal barrier coating, and the surface of the thermal barrier coating is improved. And the CMAS corrosion resistance of the coating is obviously improved. In addition, surface modification is simple and easy to operate, and the method is suitable for large-scale popularization and application.

A semiconductor component, a plasma processing device and a method for forming a corrosion-resistant coating, wherein the semiconductor component comprises: a semiconductor component body; a corrosion-resistant coating, located on the surface of the semiconductor component body, composed of a crystalline phase and an amorphous phase of a rare earth element fluoride oxide, and the crystalline phase and the amorphous phase are located in the same layer, and the amorphous phase is dispersed in the crystalline phase. The semiconductor component can reduce particle contamination problems when used in advanced processes.

The invention relates to a power distribution network parallel capacitor bank intelligent switching system for reactive compensation of a power distribution network. The system comprises capacitor banks which are respectively connected in parallel with a trunk feeder line and a branch feeder line in a power distribution network system and are used for reactive compensation, and the capacitor banks connected in parallel with the trunk feeder line and the capacitor banks connected in parallel with the branch feeder line are both provided with circuit breakers used for controlling respective switching. By arranging the capacitor bank for short-line reactive compensation, requirements of key users can be quickly compensated, the line loss is reduced, and the power supply quality and the power supply reliability of the key users are guaranteed. Through monitoring peak-valley power consumption behaviors of key users, the intelligent switching model is utilized to optimize power factors of all levels of the power distribution network, so that the power supply quality of all levels of users is correspondingly adaptively adjusted, and the power supply quality and the power supply reliability are improved.

A kind of small milliwatt level thermoelectric cell based on americium isotope heat source, including battery main body, cooling device and external measuring circuit;Battery main body includes battery heat source component, shell cover, shell body, shell cover is installed on shell body;Battery heat source component is located in shell body, and heat insulation layer is filled between battery heat source component and shell body;Upper end of battery heat source component is connected with upper fixed part, lower end is connected with lower fixed part by thermoelectric power piece, and the upper end of heat conduction column is connected with lower fixed part, and the lower end is fixed with the inside of shell body.Electricity battery heat source component includes americium heat source core block, inner package shell, outer package shell, americium heat source core block is located in inner package shell, inner package shell includes inner package shell end cover, inner package shell body, and spring is filled between inner package shell end cover lower end and americium heat source core block, and helium is filled in inner package shell;Inner package shell is placed in lead shielding layer, lead shielding layer is placed in outer package shell, and outer package shell includes outer package shell body and outer package shell end plug.

The present invention discloses a method for preparing a small-scale non-premixed low-heat dissipation combustion chamber high-entropy ceramic thermal barrier coating, which belongs to the technical field of coatings. The method for preparing a small-scale combustion chamber high-entropy thermal barrier coating comprises: S1, drying the raw materials; S2, ball milling, drying, and sieving the raw materials; S3, sintering the sieved powder, and ball milling, drying, and sieving after sintering; S4, spraying a bonding layer on the inner wall of the combustion chamber; S5, vacuum heat treatment of the combustion chamber sprayed with the bonding layer; S6, spraying a high-entropy ceramic layer on the bonding layer. The chemical formula of the high-entropy ceramic layer is La 2( Z r0.3 Hf 0.2 Ce 0.2 Sn 0.2 Ti 0.1 )2O7. The bonding layer is NiCo 23 Cr 17 Al 12 Y 0.5 The present invention adopts the above-mentioned preparation method of the small-scale non-premixed low heat dissipation combustion chamber high entropy ceramic thermal barrier coating. The high entropy ceramic layer has a higher thermal expansion coefficient and lower thermal conductivity, which is beneficial to alleviate the heat load on the channel combustion chamber, increase the combustion chamber gas boundary contact temperature, adjust the thermal flow field in the cylinder, promote the complete combustion of the fuel, and effectively slow down the flame quenching phenomenon.

The application relates to a communication chain-free motor control system based on physical layer self-adaption and reflection impedance mapping, which comprises a space magnetic flux self-adaption mechanism; a transmitting end coil of the space magnetic flux self-adaption mechanism is fixed on a primary side fixed base; a receiving end coil is arranged at one end of a secondary side sliding block, and the other end of the secondary side sliding block is connected with a secondary side mounting base through an SMA spiral driver and a balance spring respectively; the secondary side sliding block is slidingly mounted on a linear guide rail support and moves along the axial direction of the linear guide rail support; a metamaterial lens flat plate is coaxially arranged between the transmitting end coil and the receiving end coil; the transmitting end coil is connected with a primary side circuit for energy supply; and the receiving end coil is connected with a secondary side circuit for receiving wireless electric energy and driving a motor. The application cancels a secondary side communication module and a position sensor, converts complex algorithm optimization into self-regulation matching of a physical structure, and significantly improves the dynamic response speed, operation robustness and environmental tolerance of the system under severe working conditions such as strong radiation, deep water and high vacuum.

The invention relates to the field of high-temperature protective coatings, in particular to a metal slag corrosion resistant ceramic roller coating which comprises a matrix component and a suspension component in a weight ratio of (10-15): (4-6). Wherein the matrix component comprises the following components in parts by weight: 15-25 parts of zirconium oxide, 40-50 parts of calcined aluminum oxide, 1-5 parts of kaolin, 1-5 parts of silicon oxide, 5-15 parts of yttrium oxide and 5-15 parts of silicon carbide. Correspondingly, the invention further discloses a preparation method of the coating for the metal-erosion-resistant ceramic roller. By implementing the method, the corrosion of the metal slag to the ceramic roller can be effectively reduced, and the service life of the ceramic roller is prolonged.

The invention discloses a magnesium alloy intravascular stent material with a nano water repellent layer and a bioactive coating and a preparation method of the magnesium alloy intravascular stent material, and belongs to the field of surface treatment of intravascular stent materials. Hydrophobic molecules containing sulfydryl are introduced to the surface of a pretreated magnesium alloy intravascular stent material to construct a nano water-repellent middle layer, the problem that an existing magnesium alloy intravascular stent is high in degradation rate is mainly solved, the surface of the nano water-repellent layer is modified with a bioactive coating, and the biological performance of the magnesium alloy intravascular stent is further improved. The method is mild in reaction condition, low in cost and beneficial to post-treatment. The developed nano water-repellent middle layer has better hydrophobicity and can obviously delay penetration of water molecules in a physiological environment, so that the degradation rate of a magnesium alloy intravascular stent material is reduced, the in-vivo service time is prolonged, and the biocompatibility of the magnesium alloy intravascular stent is not reduced; the method is high in operability and remarkable in effect, and a new method is provided for surface modification of the magnesium alloy intravascular stent material.

The invention discloses a method for preparing a Cr / Ta double-layer coating with dual metallurgical bonding in the inner bore of a barrel, and belongs to the field of coating preparation science. The method first uses ion plating to deposit a Cr base layer twice, the arc current of the first deposition is 80-150A, the substrate negative bias voltage is 600-1000V, and the deposition is 10-30min. The substrate negative bias voltage of the second deposition is adjusted to 80-200V, and the deposition is 30-120min. Then, a Ta surface layer is deposited twice by high-power pulsed magnetron sputtering, the first deposition target discharge voltage is 400-800V, the pulse width is 30-100μs, the peak current is 200-800A, the substrate negative bias voltage is 800-1000V, and the deposition is 10-120min; the substrate negative bias voltage of the second deposition is adjusted to 20-200V, and the deposition is 60-480min. The method obtains a double-interface metallurgical bonding coating without the need for subsequent heat treatment.

A high-speed railway contact net positioning wire clamp comprises a main clamping plate, an auxiliary clamping plate, a positioning pin and a fastening assembly, semicircular holes are symmetrically formed in the top ends of the main clamping plate and the auxiliary clamping plate, rectangular through holes are symmetrically formed in the middle portions, and symmetrical thread-shaped angles are arranged on the inner sides of the lower portions; a semicircular groove is formed in the inner wall of the semicircular hole in the circumferential direction, and a first annular boss and a second annular boss are arranged on the lower portion of the positioning pin. The positioning pin is arranged between the main clamping plate and the auxiliary clamping plate which are oppositely arranged, the main clamping plate and the auxiliary clamping plate are fixedly connected together through the fastening assembly, the positioning pin is clamped between the main clamping plate and the auxiliary clamping plate, the first annular boss is embedded into an annular groove defined by the two semicircular grooves, and the second annular boss extends into the two rectangular through holes. According to the utility model, the defects of axial movement and left-right shaking of the positioning pin and the problem of serious abrasion are eliminated, the positioning is accurate in the operation process, and the stability and the safety of the current collection of the locomotive are ensured.

The invention discloses a super-hydrophobic anti-reflection type self-cleaning coating material and a preparation method thereof. The super-hydrophobic self-cleaning coating material is prepared from 1 to 3 parts of a silicon-based mesoporous material, 4 to 5 parts of coco fatty acid diethanol amide, 1 to 3 parts of nano titanium dioxide, 3 to 5 parts of dodecyl methacrylate, 1 to 3 parts of a polyethylene glycol type antistatic agent, 1 to 3 parts of expanded graphite, 1 to 3 parts of nano graphene, 30 to 50 parts of absolute ethyl alcohol and 20 to 30 parts of acetone. In the invention, through the synergistic effect of the components, the formed coating has better hydrophobicity, durability, stain resistance, anti-reflection property and antistatic property, so that the self-cleaning effect of the coating is good, the service time of the coating is greatly prolonged, and the frequent replacement cost of the coating is reduced.

The utility model belongs to the technical field of contact networks, and particularly relates to a hinge-type connected anti-skid fatigue-resistant positioning stand column which comprises an upper hoop, a lower hoop hinged to the upper hoop and a positioning column fixed to the lower hoop, the upper hoop comprises a first ring body, a first hinge portion and a first limiting portion, and the lower hoop comprises a second ring body, a second hinge portion and a second limiting portion. The lower hoop comprises a second ring body, second hinge parts and second limiting parts connected between every two adjacent second hinge parts, and each second limiting part is provided with a notch allowing the corresponding first limiting part to be embedded and limiting the rotation amplitude of the first limiting part; the stress state in the matching process of the positioning stand column and the positioning pipe is improved, the fatigue performance is improved, the service time of the positioning stand column and the positioning pipe is prolonged, the hinge type connecting structure enables the lower hoop to be thicker and more reliable, damage and breakage of the connecting portion caused by oblique shear stress are avoided, and an attaching contact plane is designed on the enclasping face of the lower hoop and the positioning pipe, so that the service life of the lower hoop is prolonged. The clamping force on the positioning pipe in the holding state is improved, the positioning pipe is prevented from sliding, and the overall reliability is improved.