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66results about How to "Improve dynamics" patented technology
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Graphene/metal oxide composite cathode material for lithium ion battery and preparation
InactiveCN102646817APromote circulationExcellent rate performanceCell electrodesHigh energyIn situ polymerization
The invention belongs to the fields of material synthesis and energy technology, and especially relates to a graphene / metal oxide composite cathode material for lithium ion batteries and a preparation method thereof. Grapheme is dispersed into various metal oxide precursor salt solutions; a graphene / metal oxide compound is obtained directly by a hydrothermal method, or an graphene / metal oxide compound is obtained by a liquid in-situ polymerization method or a coprecipitation process; and the graphene / metal oxide compound is obtained by heat treatment or hydrothermal treatment. In the invention, the novel three-dimensional composite cathode material of graphene-coated metal oxide or graphene-anchored metal oxide is prepared by carrying metal oxide particles with graphene as a carrier. The obtained composite material can be used as a lithium ion battery cathode, which has a high specific capacity, excellent cycle stability and rate capability, and is expected to be used as a lithium ion battery cathode material with a high energy density and a high power density.
Owner:INST OF METAL RESEARCH - CHINESE ACAD OF SCI
Preparation method of seamlessly integrated metal substrate/nanoporous metal/metal oxide composite electrode material, and application of compound electrode material
InactiveCN103325999AGood flexibilitySmall sizeHybrid capacitor electrodesCell electrodesComposite electrodeOxide composite
The invention discloses a preparation method of a seamlessly integrated metal substrate / nanoporous metal / metal oxide composite electrode material, and an application of the compound electrode material. The preparation method of the seamlessly integrated metal substrate / nanoporous metal / metal oxide composite electrode material comprises the following steps: 1, sequentially fully cleaning a metal substrate in an acidic solution, deionized water and ethanol, and carrying out vacuum drying; 2, depositing an alloy film on the metal substrate through using a magnetron sputtering process to obtain a structure A; 3, dealloying the structure in a corrosive solution to obtain a seamlessly integrated metal substrate / nanoporous metal structure; 4, rinsing with deionized water to remove the acid residual in the seamlessly integrated metal substrate / nanoporous metal structure, and carrying out vacuum drying to obtain a structure B; and 5, reacting the structure B in the reaction environment, and carrying out vacuum drying to obtain a seamlessly integrated metal substrate / nanoporous metal / metal oxide composite electrode. The composite electrode can be applied as an energy storage device electrode material.
Owner:JILIN UNIV
Lithium ion battery and coating separator thereof
ActiveCN107611314AImprove cycle lifeSatisfy expansionSecondary cellsCell component detailsPorous substrateLithium-ion battery
The invention discloses a lithium ion battery and a coating separator used by the same. The coating separator comprises a porous substrate and a coating layer, wherein the coating layer is coated on asurface of the porous substrate, the porous substrate comprises a first surface and a second surface, the facing directions of the first surface and the second surface are opposite, the coating layercomprises a first coating layer and a second coating layer, the first coating layer is arranged on the first surface of the porous substrate, the second coating layer is arranged on the second surface of the porous substrate, the first coating layer and the second coating layer both comprise adhesive polymers, and the mass percent of the adhesive polymer in the first coating layer is smaller thanthat of the adhesive polymer in the second coating layer. Compared with the prior art, the coating separator has the advantages that different separator coating layers are designed according to a positive electrode and a negative electrode, so that the lithium ion battery can simultaneously conform to requirements of the battery on hardness and dynamic characteristic.
Owner:NINGDE AMPEREX TECH
Electrically controlled hydraulic vehicle with individual drive and brake of wheels and recovery of braking energy
InactiveCN1363479AImprove vehicle economyReduce harmful emissionsBraking element arrangementsMotor depositionVehicle frameHydraulic accumulator
An electrically controlled and hydraulically driven vehicle with individual drive and brake of wheel and recovering braking energy has an engine and a hydraulic energy accumulator. Each wheel is equipped with a bidirectional hydraulic motor. Said engine are connected to hydraulic pump. Said hydraulic pump and each hydraulic motor are communicated to the hydraulic energy accumulator. Its electric control unit can receive the signals of different sensors and control engine and hydraulic motors. Its advantages include optical economic efficiency, recovering braking energy, reducing discharge of harmful substances, high performance, simple structure and low cost.
Owner:NANJING UNIV OF SCI & TECH
Self-suspending artificial heart
The invention discloses a self-suspending artificial heart. A rotor rotates in a pump body, so fluid is boosted to flow outside along the circumferential direction. The self-suspending artificial heart is characterized in that: the rotor consists of blades of even number; the blades are symmetrically distributed in an axial direction; the blades are connected and fixed by connecting rods; each blade has an approximately cylindrical shape; each blade comprises a flow-receiving surface and a back surface in the flow direction of a medium; and under the condition that the included angles between the upper and lower end surfaces of the rotor and the rotary horizontal plane are more than 0 degree and the condition that the included angle, namely a lower bottom angle, between the lower end surface and the rotary horizontal plane is more than or equal to 0 degree, the clearances between the upper and lower end surfaces of the rotor and the rotor of the pump body decrease progressively from the flow-receiving surface to the back surface. The self-suspending artificial heart has extremely high self-balance and self-adjustment characteristics, can effectively reduce damages to the blood and the formation of thromboses in the artificial heart, strengthen compatibility with the blood, reduce the manufacturing cost, improve the balance of the action forces applied by the blood in the artificial heart onto the rotor in different directions and improve the stability and safety of the rotor in operation.
Owner:钱逸 +1
Robust distributed average tracking control method applied to cluster intelligent systems
PendingCN110426951AImprove dynamicsImprove general performanceAdaptive controlRobust controlSmart system
The invention discloses a robust distributed average tracking control method applied to cluster intelligent systems. The method comprises the following steps of S1, establishing a mathematic model ofa cluster intelligent system; S2, designing a mathematic model of a control capable of realizing the control for the cluster intelligent system; S3, carrying out stability analysis on the controller,if the control for the system is instable, returning to the step S2, and if the control for the system is stable, continuing to execute the next step; S4, designing parameters for the mathematic modelof the controller; and S5, substituting the controller parameters obtained in the step S4 into the mathematic model of the controller so as to complete the design. Under any initial conditions, the method is capable of tracking the average value of a plurality of nonlinear reference signals, so that the dynamic characteristics of the cluster intelligent system and the reference signals are greatly expanded; the dynamics of the cluster intelligent system and the reference signals are expanded from second order to common high-order nonlinear systems; and by utilizing robust control, the requirements for the initial information are removed, so that the method is more suitable for the field of engineering and is good in practicability.
Owner:RES & DEV INST OF NORTHWESTERN POLYTECHNICAL UNIV IN SHENZHEN +1
Multivariate drilling time sequence prediction method based on mixed leakage integral CRJ network
ActiveCN110222387AImprove dynamicsImprove predictive performanceSpecial data processing applicationsMeasurement devices for drillingNetwork modelNeuron
The invention discloses a multivariate drilling time sequence prediction method based on a mixed leakage integral CRJ network. The method comprises the following steps of firstly, obtaining a time sequence data sample and performing data preprocessing on the data sample; secondly, selecting a high-correlation variable of a prediction variable as a network input by using a grey correlation algorithm; then, optimizing a traditional CRJ network model; combining a hybrid leakage integral neuron with stronger memorability mutually with a CRJ network to improve the dynamic characteristic and the prediction performance of the network; obtaining an optimal combination mode and an optimal leakage rate through a comparison experiment; constructing the mixed leakage integral CRJ network model based on an experiment result; and finally, using the trained mixed leakage integral CRJ network for carrying out time sequence prediction on the key variables of the drilling process. through the predictionresult, the change condition of the parameters are known in advance, and a corresponding adjustment strategy can be adopted in advance, and therefore it is ensured that drilling engineering is carried out safely and efficiently.
Owner:BEIJING UNIV OF CHEM TECH
Self-adjusting rotor used for conveying blood or conveying shear sensitive fluid
The invention relates to a self-adjusting rotor used for conveying blood or conveying shear sensitive fluid. The rotor rotates in a pump body so that the pressure of the fluid is increased and the fluid flows out along the circumferential direction relative to the flowing direction of a medium, the flowing direction comprises an incident flow face (3) and a back flow face (4), and an upper end face and a lower end face of the rotor are an upper oblique plane and a lower oblique plane; if the rotor is cut along a central axis, an included angle formed by an intersecting line of the upper oblique plane and a section and a rotary horizontal plane is an upper top angle beta, and the beta is more than 0 degree; an included angle formed by an intersecting line of the lower oblique plane and thesection and the rotary horizontal plane is a lower bottom angle alpha, and the alpha is more than or equal to 0 degree; the number of the rotors is even, and the rotors are symmetrically distributed along a rotating shaft; and rotor clearances are formed between the upper end face and the lower end face of the rotor and the pump body, the rotor clearances are the distances from each point on the upper end face and the lower end face to the inner surface of the corresponding pump body, and the rotor clearances from the incident flow face to the back flow face are reduced progressively. The self-adjusting rotor has extremely high self-balancing and self-adjusting properties. When the self-adjusting rotor is applied to an artificial heart, the rotor can reduce the damage to blood corpuscles,improve the compatibility with the blood, and lower the manufacturing cost.
Owner:钱逸
Large energy storage variable-section rotor flywheel energy storage system supported by permanent magnet bearing and electromagnetic bearing
PendingCN109450157AImprove dynamicsCompact structureMechanical energy handlingMagnetic bearingFlywheel energy storage
The present invention discloses a large energy storage variable-section rotor flywheel energy storage system supported by the permanent magnet bearing and the electromagnetic bearing, belongs to the technical field of flywheel energy storage, and solves the problems that the axial length of the flywheel rotor existing in the existing flywheel energy storage system affects the dynamic mechanical characteristics of the rotor and leads to the poor compactness of the structure of the flywheel energy storage system. The permanent magnet thrust bearing, the upper auxiliary bearing, the outer rotor permanent magnet synchronous motor and the lower auxiliary bearing are mounted on the mandrel, and the upper end and the lower end of the flywheel rotating body are in a clearance fit state with the upper auxiliary bearing and the lower auxiliary bearing; there is a gap between the permanent magnet thrust bearing and the upper end surface of the flywheel rotating body; the outer rotor permanent magnet synchronous motor is arranged in the flywheel rotating body to drive the flywheel rotating body to rotate; and the radial electromagnetic bearing is fixedly mounted on the shell, the electromagnetic bearing is in non-contact with the outer wall of the flywheel rotating body, and the flywheel main body is a stepped variable cross-section structure with a slope. According to the rotor system provided by the present invention, the structure is compact, and the dynamic characteristics of the rotor are enhanced.
Owner:HARBIN ELECTRIC CO LTD +1
Self-suspending artificial heart
InactiveCN101810891BImprove stabilityImprove balanceSuction devicesManufacturing cost reductionThrombus
The invention discloses a self-suspending artificial heart. A rotor rotates in a pump body, so fluid is boosted to flow outside along the circumferential direction. The self-suspending artificial heart is characterized in that: the rotor consists of blades of even number; the blades are symmetrically distributed in an axial direction; the blades are connected and fixed by connecting rods; each blade has an approximately cylindrical shape; each blade comprises a flow-receiving surface and a back surface in the flow direction of a medium; and under the condition that the included angles betweenthe upper and lower end surfaces of the rotor and the rotary horizontal plane are more than 0 degree and the condition that the included angle, namely a lower bottom angle, between the lower end surface and the rotary horizontal plane is more than or equal to 0 degree, the clearances between the upper and lower end surfaces of the rotor and the rotor of the pump body decrease progressively from the flow-receiving surface to the back surface. The self-suspending artificial heart has extremely high self-balance and self-adjustment characteristics, can effectively reduce damages to the blood andthe formation of thromboses in the artificial heart, strengthen compatibility with the blood, reduce the manufacturing cost, improve the balance of the action forces applied by the blood in the artificial heart onto the rotor in different directions and improve the stability and safety of the rotor in operation.
Owner:钱逸 +1
High performance channel simulator automatic control receiver and verification device thereof
The invention relates to the technical field of communication, and particularly relates to a high performance channel simulator automatic control receiver and a verification device thereof. The receiver is characterized in that the receiver comprises a radio frequency variable attenuating unit, a broadband coupling unit, a radio frequency demodulation unit, a detection unit, an operational amplifier unit, a local oscillation unit and a main control unit; a storage unit is arranged in the main control unit which is used for storing the optimum power value corresponding to each frequency and controlling the detection unit and the local oscillation unit. Compared with the prior art, the receiver provided by the invention has the advantages that the receiver can automatically adjust the channel level without presetting receiving power; and the receiver is stable in the best working condition, and has the characteristics of wide frequency band, large dynamic state, automation, easy use, high accuracy and excellent marketing.
Owner:创远信科(上海)技术股份有限公司
Numerical control machine tool kinematic chain design method considering nonlinear error and generalized modal
ActiveCN107703744ASolve problems that rely on prior knowledgeImprove exercise efficiencyAdaptive controlCutter locationComputational model
The invention discloses a numerical control machine tool kinematic chain design method considering a nonlinear error and a generalized modal. The method includes the steps of constructing a kinematicchain design and calculation model, with solving goals of minimizing a cumulative nonlinear error and minimizing the reciprocal of the generalized modal; generating a kinematic chain configuration population, for each kinematic chain configuration, calibrating a workpiece coordinate system, and subjecting cutter location data to the rotation transformation and the straight line transformation without travel constraints to obtain N groups of machine tool attitudes; determining whether the kinematic chain configuration matches the machine tool motion needed to realize the workpiece forming, andif not, carrying out the kinematic chain reconfiguration; calculating the generalized modal using a neural network model and calculating the cumulative nonlinear error using a differential method; andsolving the kinematic chain design and calculation model to obtain a Pareto solution set, and obtaining an optimal kinematic chain configuration by a TOPSIS method. The method of the invention overcomes the defects that a traditional kinematic chain design method relies on experience, only considers the forming characteristics of parts and has poor applicability, improves the kinematics and dynamics characteristics of a machine tool, and improves the machining accuracy of the machine tool.
Owner:ZHEJIANG UNIV
CNFs-loaded MoS2 novel magnesium-lithium double-salt battery positive electrode material and construction method thereof
ActiveCN110165155AImprove cycle stabilityExtend your lifeMaterial nanotechnologyCell electrodesLithiumFiber
The invention discloses a CNFs-loaded MoS2 novel magnesium-lithium double-salt battery positive electrode material and a construction method thereof. The CNFs account for x which is equal to 20-40wt%,and an MoS2 flower-shaped nano material accounts for 60-80wt%. The construction method comprises the steps: carbon fiber pretreatment, solution preparation, surfactant addition, PH value adjustment,hydrothermal synthesis and product collection; and finally, the one-step hydro-thermal synthesis of a final product is performed to generate a CNTs in-situ loaded MoS2 nano-composite material CNFs@MoS2. According to the invention, the capacity and the rate capability of the double-salt battery are improved, so that the cycle stability of a magnesium-lithium double-salt battery is improved, and theservice life of the battery is prolonged.
Owner:SHAANXI UNIV OF SCI & TECH
MoS2@EG magnesium-lithium double-salt ion battery positive electrode material and construction method thereof
InactiveCN110311117AImprove structural stabilityImprove mechanical propertiesMaterial nanotechnologySecondary cellsElectrical batteryDouble salt
The invention discloses a MoSe2@EG magnesium-lithium double-salt ion battery positive electrode material and a construction method thereof. a layer of high-activity nanoflower-like two-dimensional nanomaterial MoS2 is loaded in situ on the surface of EG with good conductivity by one-step hydrothermal method, efficient saturated intercalation and de-intercalation of Li+ in the positive electrode material can be effectively promoted with the help of the high conductivity of EG and the high activity and layered structure characteristics of MoS2, and the capacity and rate characteristic of double-salt batteries are improved. In addition, MoSe2@EG can effectively alleviate a problem of material pulverization caused by volume expansion and contraction of the positive electrode material due to the intercalation and de-intercalation of Li+, thereby improving the cycle stability of the magnesium-lithium double-salt ion batteries, and prolonging the battery life.
Owner:SHAANXI UNIV OF SCI & TECH
Flat-convex engaged pure rolling mechanism for inside engaging transmission of parallel shafts
InactiveCN108533681AAvoid wear and tearAvoid plastic deformationGeometric CADToothed gearingsGear wheelEngineering
The invention discloses a flat-convex engaged pure rolling mechanism for inside engaging transmission of parallel shafts and a design method of the flat-convex engaged pure rolling mechanism. The flat-convex engaged pure rolling mechanism consists of a pinion and a large gear ring of which the axes are parallel to each other; the cylindrical outer surface of the pinion is provided with helical trapezoidal grooves which are uniformly distributed; the cylindrical inner surface of the large gear ring is provided with helical circular arc teeth which are uniformly distributed; the helical circulararc teeth are matched with the helical trapezoidal grooves; the structures of the helical circular arc teeth and the helical trapezoidal grooves are determined by parameters such as an engaging lineparameter equation, the overlap ratio and the transmission ratio; in installation, the helical circular arc teeth are engaged with the helical trapezoidal grooves; and the pinion and the large gear ring are driven to rotate by a driver so as to realize transmission between the two shafts. The design method disclosed by the invention can be applied to the structural design of the pure rolling gearmechanism for the inside engaging transmission of the parallel shafts, has the advantages of being simple in design, easy in machining, high in transmission efficiency, large in overlap ratio, high inbearing capacity and the like, and is widely applied to the fields of tiny machinery, micro machinery and general machinery which are difficult to lubricate and designs of planetary gear transmission.
Owner:CHINA UNIV OF GEOSCIENCES (WUHAN)
A neural network generation method and device
The invention provides a neural network generation method and device, and the method comprises the steps: obtaining neural network generation parameters which comprise a neuron clustering number, a neuron density parameter, a distribution space size parameter, and a neuron total number; Obtaining a basic neuron according to the neuron clustering number; Generating a neural network by taking the basic neurons as a clustering center according to a preset generation rule, the number of the neurons in the neural network being the same as the total number of the neurons, each neuron in the neural network being bidirectionally interconnected with its adjacent neuron, and each neuron in the neural network being connected with itself at a preset probability; And setting an input node and an outputnode which are connected with the neural network. The neural network generated by the method can be self-clustered, the internal dynamic characteristics can be enhanced, the coupling degree between neurons is relatively low, and the connection structure of the neural network is more similar to that of a biological network compared with the neural network obtained in the prior art.
Owner:浙江新铭智能科技有限公司
Convex-concave meshing pure rolling spiral bevel gear mechanism for cross shaft transmission
InactiveCN108533685AAvoid wear and tearAvoid gluingGeometric CADToothed gearingsCarrying capacityEngineering
The invention provides a convex-concave meshing pure rolling spiral bevel gear mechanism for cross shaft transmission. The convex-flat meshing pure rolling spiral bevel gear mechanism comprises a small gear and a large gear, and the small gear and the large gear form a transmission pair. The small gear is fixedly connected with a drive through an input shaft, and the large gear is connected with an output shaft. The axis of the small gear intersects with the axis of the large wheel, and n1 uniformly distributed convex spiral circle-arc teeth are arranged on the outer surface of a cone of the small gear. The center lines of all the spiral circle-arc teeth are equal pitch conical spiral lines, and transitional fillets are arranged between the spiral circle-arc teeth and the outer surface ofthe cone of the small gear. n2 uniformly distributed spiral arc grooves are formed in the outer surface of a cone of the large gear, and the center lines of all the spiral arc grooves are equal pitchconical spiral lines. Transitional fillets are arranged between the spiral arc grooves and the outer surface of the cone of the large gear, and the engagement system of the spiral circle-arc teeth ofthe small gear and the spiral arc grooves of the large gear is pure rolling meshing transmission of point contact. The convex-flat meshing pure rolling spiral bevel gear mechanism for the cross shafttransmission has the beneficial effects that transmission efficiency is high, contact ratio is large, carrying capacity is high, and the convex-flat meshing pure rolling spiral bevel gear mechanism for the cross shaft transmission can be widely applied to the fields of small, micro machines and conventional machines which are not easy to lubricate.
Owner:CHINA UNIV OF GEOSCIENCES (WUHAN)
Composite microemulsion cleaning agent for cleaning aged trimethyl resin
InactiveCN102775841ASystem stabilityImprove dynamicsChemical paints/ink removersN-Butyl acetateOil phase
The invention discloses a composite microemulsion cleaning agent which is an oil-in-water type composite microemulsion and comprises the following components: 3-4g / 100ml of lauryl sodium sulfate, 6-8% of n-amyl alcohol in volume ratio, 1-7% of propylene carbonate in volume ratio and 1.5-11% of oil phase in volume ratio, wherein the oil phase comprises ethyl acetate or methylbenzene, dimethylbenzene, ethyl acetate and butyl ester in volume ratio of 39:11:11:39, or a mixture of n-butyl acetate, ethyl acetate and methylbenzene in volume ratio of 55:40:5. The invention also discloses a method for preparating the composite microemulsion cleaning agent. The composite microemulsion cleaning agent provided by the invention has the advantages of stable system, small collective, high trend, large interface, larger oil-water interface radius of curvature, safety, low toxicity, convenience in transportation and use and the like.
Owner:中国文化遗产研究院
Potassium ion hybrid capacitor and preparation method thereof
ActiveCN111584248AImprove dynamicsAchieve matchingHybrid capacitor electrolytesHybrid capacitor electrodesPhysicsPotassium ions
The invention discloses a potassium ion hybrid capacitor and a preparation method thereof. The potassium ion hybrid capacitor comprises a capacitance type positive electrode, a battery type negative electrode and an organic electrolyte, and the preparation method comprises the following steps: 1) the preparation of the capacitance type positive electrode, and preparation includes the preparation of a capacitance type positive electrode material, positive electrode mixing, coating and punching; 2) the preparation of a battery type negative electrode, the preparation includes the steps of preparing a battery type negative electrode material, mixing the negative electrode, coating and punching, 3) the preparation of the organic electrolyte, and 4) the assembly of the potassium ion hybrid capacitor, wherein the mass ratio of the positive electrode to the negative electrode is the optimal mass ratio obtained from different current densities, and the potassium ion hybrid capacitor has the characteristics of high energy density and high power density, and shows the application potential in the fields of braking devices, electric automobile energy supply, aerospace and the like.
Owner:HUNAN UNIV
Helicopter rotor system with flexible beam structure
The invention discloses a helicopter rotor system with a flexible beam structure. The helicopter rotor system comprises a blade (1), and further comprises a shimmy torsion beam device (5) and a swing torsion beam device (7). The swing torsion beam device (7) is fixedly connected with the shimmy torsion beam device (5) through side plates (6). The swing torsion beam device (7) is rotatably connected with the blade (1) through a socket device. The helicopter rotor system has the advantages of being simple in structure and the like, the swing, shimmy and torsion and coupling effects of the swing, shimmy and torsion can by fully used, and the dynamic characteristics of the helicopter rotor system are greatly improved. Meanwhile, the helicopter rotor system has the characteristic of high adaptability, and is suitable for rotor structures of various helicopters, such as inarticulate helicopters.
Owner:HUNAN UNIV
Flat-convex engaged pure rolling bevel gear mechanism for transmission of crossed shafts
InactiveCN108691954AAvoid wear and tearAvoid gluingGeometric CADToothed gearingsEngineeringBevel gear
Owner:CHINA UNIV OF GEOSCIENCES (WUHAN)
Anti-overcharge low-temperature rate type negative pole piece and manufacturing method thereof, and lithium ion battery based on negative pole piece
ActiveCN113258037AImprove conductivityEvenly dispersedNegative electrodesElectrode collector coatingPhysical chemistryCoated electrodes
The invention discloses an anti-overcharge low-temperature rate type negative pole piece and a manufacturing method thereof, and a lithium ion battery based on the negative pole piece, belonging to the technical field of lithium ion batteries. The manufacturing method comprises the following steps: uniformly mixing composite additive slurry and negative electrode slurry on a negative current collector and then conducting coating, or coating the composite additive slurry and the negative electrode slurry in a layered manner so as to obtain a coated electrode current collector; and drying the coated electrode current collector, and then conducting compacting to obtain the anti-overcharge low-temperature rate type negative electrode plate, wherein the composite additive slurry comprises the following components in percentage by mass: 0.1%-4% of an overcharge-preventing additive, 1%-6% of a conductive additive, 1%-6% of a heat-conducting additive and 0.1%-1% of a dispersing agent, with the balance being a solvent. According to the anti-overcharge low-temperature rate type negative pole piece prepared by the method and the lithium ion battery based on the negative pole piece, the lithium ion battery has excellent low-temperature discharge performance and rate discharge performance and good anti-overcharge safety performance, which are the key to solve problems in the prior art.
Owner:SHAANXI COAL & CHEM TECH INST
Drafting arrangement for a spinning machine
InactiveCN1878897AHigh sensitivityFor fast and precise controlDrafting machinesEngineeringAcceleration Unit
Disclosed is a drafting arrangement for a spinning machine, particularly a draft regulator, comprising at least two successive pairs of rollers, several electric motors (10, 20) for driving at least one respective roller (2, 3, 4) belonging to said roller pairs, and an electronic regulating ring (5) to which the electric motors (10, 20) are connected. The drafting arrangement is characterized in that an acceleration sensor (12, 22) is allocated to at least one electric motor (10, 20) and / or at least one roller (2, 3, 4).
Owner:RIETER INGOLSTADT SPINNEREI
DNA (deoxyribonucleic acid) phosphorothioation modifier gene cluster
ActiveCN105087554AImprove dynamicsFermentationVector-based foreign material introductionHeterologousPhosphoric acid
The invention discloses a DNA (deoxyribonucleic acid) phosphorothioation modifier gene cluster. DNA phosphorothioation modifiers controlled by the gene cluster are single-chain modifiers, selective sequence sites are CpsC, the integral phosphorothioation modifier gene cluster comprises four genes including an encoding cysteine desulfurase gene and a 3' phosphoadenosine-5' phosphosulfate (PAPS) reductase gene, and encoding proteins of the two other genes are members of ABC transport protein families and DUF4007 super-families respectively. The DNA phosphorothioation modifier gene cluster has the advantages that the genes and the proteins of the genes can be used in the bio-pharmaceutical science fields of heterogeneous-source host DNA modification, epigenetics, cell-free phosphorothioation modification system construction, oligonucleotide medicine modification and the like.
Owner:WUHAN UNIV
Concave-convex meshing pure rolling spiral bevel gear mechanism for cross shaft transmission
ActiveCN108533686AAvoid wear and tearAvoid plastic deformationGeometric CADPortable liftingBevel gearDesign methods
The invention discloses a concave-convex meshing pure rolling bevel gear mechanism for cross shaft transmission and a design method thereof. The concave-convex meshing pure rolling bevel gear mechanism for the cross shaft transmission comprises a small gear and a large gear, and the small gear and the large gear form a transmission pair. The axis of the small gear intersects with the axis of the large wheel. Concave spiral arc grooves are uniformly formed in the outer surface of a cone of the small gear, and convex spiral circle-arc teeth are uniformly distributed on the outer surface of a cone of the large gear. The structures of the spiral circle-arc teeth and the spiral arc grooves are jointly determined by a pure rolling meshing line parameter equation and parameters such as contact ratio and transmission ratio, and the spiral circle-arc teeth are matched with the spiral arc grooves. The spiral circle-arc teeth mesh with the spiral arc grooves during the installation of the small gear and the large gear, and the small gear and the large gear are driven by a drive to rotate to realize the transmission between two cross shafts. The concave-convex meshing pure rolling bevel gear mechanism for the cross shaft transmission and the design method thereof can be used for the design of the pure rolling bevel gear mechanism of the cross shafts, have the advantages of simple design, easy processing, high transmission efficiency, large contact ratio, high bearing capacity and the like, and can be widely applied to the fields of small, micro machines and conventional machines whichare not easy to lubricate.
Owner:CHINA UNIV OF GEOSCIENCES (WUHAN)
Convex-convex engaged pure rolling helical bevel gear mechanism for cross shaft transmission
InactiveCN108533683AAvoid wear and tearAvoid gluingGeometric CADPortable liftingHelical lineCircular cone
The invention provides a convex-convex engaged pure rolling helical bevel gear mechanism for cross shaft transmission. The convex-convex engaged pure rolling helical bevel gear mechanism comprises a pinion and a main gear which form a transmission pair; the pinion is fixedly connected with a driver through an input shaft; the main gear is connected with an output shaft; the axis of the pinion is intersected with the axis of the main gear; the conical outer surface of the pinion is provided with n1 helical circular arc teeth which are distributed uniformly; the center lines of all helical circular arc teeth all are equal-lift conical helical lines; a transition fillet is arranged between the helical circular arc teeth and the conical outer surface of the pinion; the conical outer surface ofthe main gear is provided with n2 helical circular arc teeth which are distributed uniformly; the center lines of all helical circular arc teeth all are equal-lift conical helical lines; a transitionfillet is arranged between the helical circular arc teeth and the conical outer surface of the main gear; and the helical circular arc teeth of the pinion and the helical circular arc teeth of the main gear are engaged in a point-contact pure rolling engagement transmission manner. The convex-convex engaged pure rolling helical bevel gear mechanism provided by the invention has the beneficial effects of being high in transmission efficiency, large in overlap ratio, high in bearing capacity and widely applied to the fields of tiny machinery, micro machinery and general machinery which are difficult to lubricate.
Owner:CHINA UNIV OF GEOSCIENCES (WUHAN)
Preparation method of sodion energy storage graphene/sodium titanate non-woven fabric material
ActiveCN109888190AImprove mechanical propertiesImprove electronic conductivityHybrid capacitor electrodesCell electrodesStrontium titanateSynthesis methods
The invention relates to a preparation method of a sodion energy storage graphene / sodium titanate non-woven fabric material. The method comprises the following steps of: placing sodium titanate powderin graphene oxide / N,N-dimethyl formamide solution (GO / DMF) to obtain graphene oxide / sodium titanate / N,N-dimethyl formamide solution; injecting the obtained mixed solution into curing solution by an automatic injection machine at a uniform injection speed of 2 to 20ml / h, carrying out spinning according to a non-woven fabric structure, and drying an obtained graphene oxide / sodium titanate non-wovenfabric which is finally spun to have 2 to 10 layers at the room temperature; and then carrying out heat preservation in a container with hydrazine hydrate and finally, obtaining the graphene / sodium titanate non-woven fabric. According to the invention, the prepared graphene / sodium titanate non-woven fabric material is excellent in electrochemical performance, high in yield, low in price, convenient for industrial application, simple in synthesis method, non-toxic and harmless, and has the enormous potential in future portable and wearable energy storage products.
Owner:HEBEI UNIV OF TECH
High-voltage pulse electric field treatment device for accelerating releasing of formaldehyde in artificial wood board
ActiveCN106078988ADoes not affect the production processSuitable for large-scale useElectric wood treatmentWood treatment detailsPhysicsAdhesive
The invention discloses a high-voltage pulse electric field treatment device for accelerating releasing of formaldehyde in a nartificial wood board. The high-voltage pulse electric field treatment device comprises a strong pulse electric field treatment chamber. A high-voltage electrode used for generating a strong pulse electric field and a low-voltage electrode are arranged in the strong pulse electric field treatment chamber. A high-voltage pulse power source is used for supplying electricity to the high-voltage electrode, which generates the strong pulse electric field, in the strong pulse electric field treatment chamber. The output voltage of the high-voltage pulse power source is adjustable so that the strong pulse electric field with the adjustable electric field intensity ranging from 10 kV / cm to 100 kV / cm is formed between the high-voltage electrode and the low-voltage electrode. The to-be-treated board is placed between the high-voltage electrode and the low-voltage electrode. According to the high-voltage pulse electric field treatment device for accelerating releasing of the formaldehyde in the artificial wood board, releasing of the free formaldehyde in the artificial wood board can be accelerated within relatively-short time, accelerated decomposing and releasing of unstable groups in an adhesive are promoted, and therefore the content and the releasing amount of the formaldehyde of the board are reduced, and the environment-friendliness grade and additional value of the board are improved.
Owner:长沙睿博精密机械有限公司
Rapid ion-enhanced method for soda-lime-silica glass and soda-lime-silica ion-enhanced glass
The invention aims to provide a rapid ion-enhanced method for soda-lime-silica glass and soda-lime-silica ion-enhanced glass, belongs to the technical field of glass enhanced treatment and in particular relates to a rapid ion-enhanced method for soda-lime-silica glass. The method comprises the following steps: providing a soda-lime-silica glass product, and cleaning with deionized water; providingan aqueous solution comprising an ion-exchange material, and uniformly spraying the aqueous solution into a mold cavity; placing the cleaned glass product inside the mold cavity; placing the mold with the built-in glass product on an induction heater, and performing ion exchange enhancement; stopping heating, taking the glass product out of the mold, naturally cooling in air, and drying after ultrasonic cleaning, thereby obtaining the soda-lime-silica glass product subjected to ion exchange enhancement. According to the method disclosed by the invention, the ion-enhanced time of the soda-lime-silica glass is greatly shortened, and ions that are difficult in ion exchange, such as Ca<2+>, Al<3+> and the like, can be exchanged, so that the production efficiency is improved, the cost and energy consumption are reduced, and a new path is provided for improving the strength of the soda-lime-silica glass.
Owner:文登市文胜玻璃有限公司
A three-degree-of-freedom hybrid robot mechanism
ActiveCN104552247BEasy to fixGood compensationProgramme-controlled manipulatorKinematicsThree degrees of freedom
The invention discloses a hybrid robot mechanism with three degrees of freedom. The hybrid robot mechanism with three degrees of freedom comprises a rack, a rotary platform, a tail movable platform and a branch chain, wherein the rotary platform and the tail movable platform are connected by the branch chain; the rotary platform is connected with the rack by virtue of a first rotary pair; the branch chain comprises two driving branch chains and two restraint branch chains; two driven arms in the driven branch chains are connected with the tail movable platform only by virtue of a public rotary pair. Spatial internal three-dimensional movement can be realized by the tail movable platform, postures are kept constant, the operating space is large, the dynamic property is good, kinematics forward and reverse solution is simple, the manufacturing cost of the mechanism is low, and the hybrid robot mechanism belongs to a light-type robot and is applicable to industrial tasks such as large-range catching and releasing operations.
Owner:SOUTH CHINA UNIV OF TECH
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