Abstract

The present invention belongs to the field of graphene and functional rubber composites thereof, and particularly relates to a graphene-modified natural rubber that is simultaneously reinforced and toughened based on a strong interface action of a free radical annihilation reaction. A free radical adsorbent is loaded on the surface of reduced graphene oxide during the process of reducing graphene oxide, and a reduced graphene oxide-modified natural rubber composite is then prepared by using a water-phase synergistic coagulation process and a mechanical blending method. During the mechanical blending process, the free radical adsorbent, which is loaded on the surface of the reduced graphene oxide, can be subjected to an annihilation reaction with free radicals, which are generated when rubber macromolecules are subjected to the action of heat and/or force, and the reinforcing effect thereof on the interaction of a two-phase interface is greater than that of a hydrogen bond, such that the content of bound rubber of the natural rubber can be increased, the cross-linking density of the natural rubber vulcanized rubber is increased, the cross-linked network is better improved, and a simultaneously reinforced and toughened graphene-modified natural rubber composite is finally obtained. The preparation process of the present invention is simple and environmentally friendly, and does not have any harsh requirements.

IPC Classes  ?

• C08L 7/00 - Compositions of natural rubber
• C08K 9/12 - Adsorbed ingredients
• C08K 3/04 - Carbon

Abstract

The present invention relates to the technical field of nonmetallic compounds, and in particular to a reaction-extrusion preparation process and fertilization method for a weathered coal humic acid/urea-formaldehyde compound. In an alkaline environment, paraformaldehyde is depolymerized into formaldehyde small molecules and reacts with urea in a system to generate monomethylol urea and dimethylol urea. Then, under the strong shearing action of screws of a twin-screw reaction extruder, macromolecular weathered coal humic acid in the system is cracked into relatively small-molecular weathered coal humic acid to expose a large number of active groups of carboxyl, some of which are immediately subjected to dehydration-condensation reaction with amino on urea-formaldehyde molecules generated by polycondensation in the reaction-extrusion process in the system to generate a weathered coal humic acid/urea-formaldehyde compound, and particles of the weathered coal humic acid/urea-formaldehyde compound are obtained. The prepared compound particles have a high compressive strength, so that the breakage of fertilizer particles during storage, transportation and application can be avoided, and a fertilization and sowing integrated machine can be used to perform fertilization while sowing, thereby saving labor, time and fertilizers.

IPC Classes  ?

• C05C 9/02 - Fertilisers containing urea or urea compounds containing urea-formaldehyde condensates
• C05G 3/40 - Mixtures of one or more fertilisers with additives not having a specifically fertilising activity for affecting fertiliser dosage or release rateMixtures of one or more fertilisers with additives not having a specifically fertilising activity for affecting solubility
• C05G 3/80 - Soil conditioners
• C05G 5/12 - Granules or flakes
• B01J 2/20 - Processes or devices for granulating materials, in generalRendering particulate materials free flowing in general, e.g. making them hydrophobic by expressing the material, e.g. through sieves and fragmenting the extruded length
• A01C 21/00 - Methods of fertilising

Abstract

The present invention relates to the technical field of dielectric materials, and specifically relates to the microwave preparation and use of a single-metal-atom-doped reduced graphene oxide dielectric material. The preparation of the present invention comprises: adding an aqueous solution of a metal salt to an aqueous dispersion of graphene oxide to obtain a mixed solution, mechanically stirring same to enable the metal salt and the graphene oxide to sufficiently interact with each other, and uniformly loading metal ions in the mixed solution onto the surfaces of lamellas of the graphene oxide by means of the interaction between the metal ions and oxygen-containing functional groups of the graphene oxide; conducting freeze-drying, so as to obtain a metal salt/graphene oxide compound; and placing the metal salt/graphene oxide compound in a microwave oven, adding an initiator, and performing a reduction reaction, so as to obtain a single-metal-atom-doped reduced graphene oxide dielectric material. In the present invention, a solid-phase microwave reduction process is used, and the reduction effect can be effectively controlled without the generation of industrial waste liquid; therefore, the process is more environmentally friendly, and the product is purer.

IPC Classes  ?

• C01B 32/184 - Preparation
• B22F 9/20 - Making metallic powder or suspensions thereofApparatus or devices specially adapted therefor using chemical processes with reduction of metal compounds starting from solid metal compounds
• B22F 1/12 - Metallic powder containing non-metallic particles

Abstract

Preparation of a long-life load-bearing tire made of natural rubber having undergone graphene/different-particle-size carbon black synergistic modification and vulcanization modification. Carbon black having different particle sizes is subjected to surface modification to prepare a graphene oxide/different-particle-size carbon black uniform dispersion liquid, a rubber master batch is then prepared by using a water-phase synergetic coagulation-sedimentation process, and the long-life load-bearing tire made of natural rubber having undergone graphene/different-particle-size carbon black synergistic modification and vulcanization modification is eventually obtained. The dispersion of a reinforcing filler in a rubber matrix is improved by utilizing a method of compounding graphene and carbon black having different particle sizes, thereby slowing down the aging failure of the load-bearing tire while improving the hardness and mechanical properties of the rubber; moreover, the crosslinked network structure of the rubber is adjusted by regulating and controlling the ratio of a vulcanizing agent to an accelerant, thereby enabling the rubber to have better mechanical properties while improving the heat generation and hardness thereof, and therefore the service life of the load-bearing tire made of natural rubber is further prolonged.

IPC Classes  ?

• C08L 7/00 - Compositions of natural rubber
• C08K 9/04 - Ingredients treated with organic substances
• C08K 9/02 - Ingredients treated with inorganic substances
• C08K 9/08 - Ingredients agglomerated by treatment with a binding agent
• C08K 3/04 - Carbon
• B60C 1/00 - Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition
• B29D 30/02 - Solid tyres
• B29B 7/00 - MixingKneading

Abstract

The present invention relates to the technical field of composite materials and forming thereof, and specifically relates to an efficient and green method for preparing a polyether ether ketone composite material reinforced by nano-modified polyether arone sized fiber cloth. The method comprises: first, preparing a nano-modified polyether arone water-based sizing agent; sizing fiber cloth by using the sizing agent; and finally, preparing a polyether ether ketone composite material reinforced by the nano-modified polyether arone sized fiber cloth by means of a slurry method. The sizing agent is free of decomposition and failure with heat in a high-temperature forming process of the composite material; moreover, a polyether arone component in the sizing agent is similar to polyether ether ketone in structure and has good compatibility with same; anchor points with a mechanical locking effect are provided by means of the introduction of nanoparticles, such that fibers and a resin are connected together by means of the mechanical locking effect; in addition, a polyether ether ketone powder is dispersed into a cosolvent/water mixed solvent and then brushed onto the fiber cloth, and polyether ether ketone more easily infiltrates fiber bundles by means of a solution, such that an infiltration path of the melt resin is shortened, and the interface performance of the composite material is also improved to a certain extent.

IPC Classes  ?

• C08J 5/06 - Reinforcing macromolecular compounds with loose or coherent fibrous material using pretreated fibrous materials
• C08L 61/16 - Condensation polymers of aldehydes or ketones with phenols only of ketones with phenols
• C08K 9/04 - Ingredients treated with organic substances
• C08K 9/02 - Ingredients treated with inorganic substances
• C08K 7/10 - Silicon-containing compounds

Abstract

An efficient preparation method for a high-temperature-resistant wave-transmitting micro-nano multi-scale quartz fiber cloth reinforced thermoplastic composite material, comprising the following specific steps: first, uniformly dispersing low-dielectric nanoparticles and a micron high-temperature-resistant sizing polymer to obtain a sizing agent, and then carrying out ultrasonic immersion on quartz fiber cloth in the sizing agent, so that the surface of quartz fibers is coated with a composite sizing layer formed by the low-dielectric nanoparticles and the micron high-temperature-resistant polymer; dispersing the low-dielectric high-temperature-resistant nanoparticles into a high-temperature-resistant thermoplastic resin matrix by using a mechanical blending method; and finally compounding the modified quartz fibers and a thermoplastic resin to prepare the composite material. By synergistically modifying the quartz fiber cloth and the resin, a micro-nano multi-scale interface layer is formed on the interface of the composite material, thereby remarkably improving the comprehensive properties of the composite material such as mechanical properties, dielectric properties, and thermal properties; moreover, the preparation method is simple and efficient, involves low costs, and is free of environmental pollution.

IPC Classes  ?

• C08J 5/06 - Reinforcing macromolecular compounds with loose or coherent fibrous material using pretreated fibrous materials
• C08K 3/34 - Silicon-containing compounds
• C08K 3/28 - Nitrogen-containing compounds
• C08K 3/22 - OxidesHydroxides of metals
• C08L 61/16 - Condensation polymers of aldehydes or ketones with phenols only of ketones with phenols
• C08L 79/08 - PolyimidesPolyester-imidesPolyamide-imidesPolyamide acids or similar polyimide precursors
• C08L 81/02 - PolythioethersPolythioether-ethers
• C08L 81/06 - PolysulfonesPolyethersulfones
• C08K 9/04 - Ingredients treated with organic substances
• C08K 9/02 - Ingredients treated with inorganic substances
• C08K 9/06 - Ingredients treated with organic substances with silicon-containing compounds
• C08K 7/10 - Silicon-containing compounds

Abstract

The present invention relates to the technical field of functional composite materials, and in particular, to a lightweight, low-thickness, long-term reliable multi-band radar stealth and bulletproof integrated metamaterial, comprising a ceramic layer, an ultra-high molecular weight polyethylene (UHMWPE) fiber composite bulletproof layer, a graphene-based metamaterial filter layer, an ultra-high molecular weight polyethylene fiber composite loss layer, and a carbon fiber reflective layer that are sequentially stacked. By the use of the two ultra-high molecular weight polyethylene fiber resin composite layers as loss layers and the circuit resonance of the graphene-based metamaterial filter layer to produce passbands and stopbands, the present invention controls the working conditions of the ultra-high molecular weight polyethylene fiber resin composite layers in different radar wave frequency bands and thus establish a structure capable of producing a λ/4 resonance simultaneously at low and high frequencies, so as to give a stealth metastructure having the advantages of lightweight, a low thickness, and excellent absorption capability in dual frequency bands based on a bulletproof structure, thus achieving the effective synergy between bulletproof performance and radar stealth performance and maintaining the ability to address radar detection even after a certain degree of strike damage.

IPC Classes  ?

• H01Q 15/00 - Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices

Abstract

The present invention belongs to the technical field of functional rubber composite materials, and particularly relates to a high-efficiency and low-cost preparation method for a high-graphene-content superfine natural rubber powder masterbatch and use. Firstly, a high-graphene-content superfine natural rubber powder masterbatch with a particle diameter lower than 5 μm is obtained by adopting a spray drying method easy for industrial production, and then the obtained high-graphene-content superfine natural rubber powder masterbatch is mixed with a natural rubber block, carbon black and the like by adopting a mechanical blending process to prepare a graphene-modified natural rubber nanocomposite material. The present invention utilizes the spray drying process to prepare the graphene-modified natural rubber superfine powder masterbatch, so that the time and energy consumption of dehydration and drying can be greatly reduced, and the production period is greatly shortened, thereby significantly reducing the cost of the graphene-modified natural rubber masterbatch, providing a new thought for the application of the graphene-modified natural rubber nanocomposite material in the tire industry, and also laying a foundation for green and environmentally friendly practices in the tire industry.

IPC Classes  ?

• C08L 7/00 - Compositions of natural rubber
• C08K 9/04 - Ingredients treated with organic substances
• C08K 3/04 - Carbon
• B29B 7/00 - MixingKneading

Abstract

The present invention relates to the technical field of non-metal compounds, particularly relates to the field of sustained-/controlled-releasing urea-formaldehyde chemical fertilizers, and particularly relates to a papermaking wood pulp byproduct sulfonated lignin/urea-formaldehyde fertilizer and a reactive extrusion granulation process. The process comprises mixing a hydroxymethylated sulfonated lignin solution and a hydroxymethylurea solution, then pumping same into a reactive extrusion all-in-one machine, reacting same until the system becomes viscous, then extruding same by a twin-screw extruder to obtain a strip-shaped product, drying same and then cutting same into granules to obtain papermaking wood pulp byproduct sulfonated lignin/urea-formaldehyde fertilizer columnar granules. With respect to the papermaking wood pulp byproduct sulfonated lignin/urea-formaldehyde fertilizer columnar granules prepared by the present invention, sulfonated lignin molecules are introduced onto the backbone of urea-formaldehyde macromolecules to reduce the degree of polymerization and the degree of crystallinity of the urea-formaldehyde fertilizer, so as to regulate the release rate of nitrogen nutrients in the fertilizer, thus solving the defect of slow nutrient release in later growth periods of crops of traditional urea-formaldehyde fertilizers, and widening the range of applicable crops of urea-formaldehyde fertilizers.

IPC Classes  ?

• C08H 7/00 - LigninModified ligninHigh-molecular-weight products derived therefrom
• C05G 3/40 - Mixtures of one or more fertilisers with additives not having a specifically fertilising activity for affecting fertiliser dosage or release rateMixtures of one or more fertilisers with additives not having a specifically fertilising activity for affecting solubility
• C05G 3/80 - Soil conditioners
• C05G 5/12 - Granules or flakes
• B29B 9/06 - Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion

Abstract

222OH on the surface of the starch undergo a dehydration condensation reaction under acidic and high-temperature conditions to generate a urea formaldehyde/starch polycondensate having said structure. Compared with traditional urea formaldehyde fertilizer, after starch is introduced, the present invention greatly improves the mechanical performance of prepared urea formaldehyde fertilizer particles, achieves high particle strength, and facilitates subsequent storage, transportation, and application.

IPC Classes  ?

• C05G 3/40 - Mixtures of one or more fertilisers with additives not having a specifically fertilising activity for affecting fertiliser dosage or release rateMixtures of one or more fertilisers with additives not having a specifically fertilising activity for affecting solubility
• C05G 3/90 - Mixtures of one or more fertilisers with additives not having a specifically fertilising activity for affecting the nitrification of ammonium compounds or urea in the soil
• C05G 5/12 - Granules or flakes

Abstract

The present invention relates to a trace element-amino acid chelate/urea-formaldehyde slow-release fertilizer and a reactive extrusion preparation process therefor. Said slow-release fertilizer consists of a biodegradable urea-formaldehyde polymer and a trace element-amino acid chelate, wherein the macromolecular chain of the biodegradable urea-formaldehyde polymer interpenetrates into a cross-linked network structure of the molecular chain of the trace element-amino acid chelate, thereby the two structures forming a polymer composite having a semi-interpenetrating network structure. Said slow-release fertilizer solves the defect of a single nutrient in existing urea-formaldehyde slow-release nitrogen fertilizers and provides various nutrients for plant growth, and also can improve the utilization efficiency of nitrogen contained in urea-formaldehyde and introduced trace elements such as ferrum, copper and zinc. In addition, the reactive extrusion granulation process has the advantages of continuous large-scale production, low investment and low cost, no use of solvents harmful to human bodies and environment, simplified volatile matter removal and granulation processes for the polymer, high efficiency, uniform product performance and the like. Therefore, the present invention has good application prospects.

IPC Classes  ?

• C05G 3/40 - Mixtures of one or more fertilisers with additives not having a specifically fertilising activity for affecting fertiliser dosage or release rateMixtures of one or more fertilisers with additives not having a specifically fertilising activity for affecting solubility

Abstract

The present invention relates to the technical field of molds for plastic molding, and disclosed are a high-precision and high-efficiency injection mold for a high-aspect-ratio double-layer cylindrical part, and a molding method using same. The injection mold comprises a support base plate (1). A movable mold fixing frame (2) and a movable mold base plate (3) are sequentially mounted at the middle of a lower surface of the support base plate (1) by means of positioning screws (31). The center of an upper surface of the support base plate (1) is provided with a lower core mold accommodating cavity, which is adapted to mount a lower core mold (14). The lower core mold (14) is provided with a lower semicircular cavity (141), which is adapted to accommodate an outer die barrel (20); a right side of the lower semicircular cavity (141) is open, and a left side of the lower semicircular cavity is provided with a lower half cavity bottom (142); the lower half cavity bottom (142) is provided with a lower semicircular hole (143), which is adapted to accommodate an inner die rod (21), and an upper surface of the lower core mold (14) is provided with a positioning protrusion (144), a lower half feeding groove (145) and a remaining groove (146). The present invention has a rational design and has a good practical application value.

IPC Classes  ?

• B29C 45/26 - Moulds
• B29C 45/33 - Moulds having transversely, e.g. radially, movable mould parts

Abstract

A lightweight bulletproof and anti-explosion multiphase composite armor material based on a high-toughness heterogeneous interface layer and a bonding method. A main structure of the multiphase composite armor material comprises a carbon fiber composite material crack arrest layer (1), a ceramic bullet breaking layer (2), an ultra-high molecular weight polyethylene fiber composite material energy absorption layer (3) and a carbon fiber composite material support layer (4) which are sequentially arranged inwards from a bullet facing surface, and any two adjacent layers are bonded together by a high-toughness heterogeneous interface adhesive film layer (5). The problems of large density, serious back protrusion and insufficient continuous shooting resistance of a current bulletproof and anti-explosion armor material can be solved. According to the bonding method, the bonding strength of the heterogeneous interface can be effectively enhanced, and the critical energy release rate is increased; moreover, the protection level of the protective armor on the penetrative damage and the non-penetrative damage is improved. In addition to bulletproof and anti-explosion armors, the bonding method can be applied to a plurality of high-speed impact resistant structures such as high-speed train bodies, various aircraft shells, and individual soldier protection equipment.

IPC Classes  ?

• F41H 5/04 - Plate construction composed of more than one layer

Abstract

A method for preparing graphene/natural rubber with simultaneously improved mechanical property, heat conduction and wear resistance, comprising: forming graphene oxide loaded with nano silicon dioxide by means of electrostatic interaction between silicon dioxide and graphene oxide; adding graphene oxide loaded with nano silicon dioxide into natural latex; preparing a graphene master batch by using an aqueous phase synergistic coagulation process; and obtaining graphene/natural rubber by means of a mechanical blending method and a vulcanization process. The electrostatic interaction between silicon dioxide and graphene oxide is a dynamic acting force which not only reinforces the crosslinked network structure of the graphene/natural rubber composite material and significantly increases the crosslinking density, but also enables the graphene filler to entangle a large amount of rubber molecular chains and enhances the interface interaction between the graphene and the rubber matrix in the dynamic movement process of the rubber, thereby improving the mechanical property, the heat conduction and the wear resistance simultaneously.

IPC Classes  ?

• C08J 3/24 - Crosslinking, e.g. vulcanising, of macromolecules
• C08L 7/00 - Compositions of natural rubber
• C08K 9/12 - Adsorbed ingredients
• C08K 9/06 - Ingredients treated with organic substances with silicon-containing compounds
• C08K 3/36 - Silica
• C08K 3/04 - Carbon

Abstract

A device and a method for the industrialized continuous and simplified preparation of a urea-formaldehyde precise-release nitrogen fertilizer or a urea-formaldehyde-based slow- and controlled-release multi-nutrient fertilizer. By means of various regulation and control means such as self-polycondensation of hydroxymethyl urea or copolycondensation of hydroxymethyl urea and a modifying molecule during the reactive extrusion process, an accurate regulation and control of the nutrient release rate of a urea-formaldehyde precise-release nitrogen fertilizer or a urea-formaldehyde-based slow- and controlled-release multi-nutrient fertilizer is realized. The preparation device is simple and efficient, and the preparation method is stable and easy to control, which are convenient for achieving large-scale batch continuous production. In addition, the preparation system and method have good mobility, whereby a suitable modifying substance can be selected according to the growth cycles of different crops, so as to prepare a urea-formaldehyde precise-release nitrogen fertilizer or a urea-formaldehyde-based slow- and controlled-release multi-nutrient fertilizer that is matched with the nutrient requirements of the whole crop growth cycle.

IPC Classes  ?

• B01J 19/18 - Stationary reactors having moving elements inside
• B01J 4/00 - Feed devicesFeed or outlet control devices
• B01J 2/20 - Processes or devices for granulating materials, in generalRendering particulate materials free flowing in general, e.g. making them hydrophobic by expressing the material, e.g. through sieves and fragmenting the extruded length
• F26B 21/10 - TemperaturePressure
• C05C 9/02 - Fertilisers containing urea or urea compounds containing urea-formaldehyde condensates
• C05G 3/40 - Mixtures of one or more fertilisers with additives not having a specifically fertilising activity for affecting fertiliser dosage or release rateMixtures of one or more fertilisers with additives not having a specifically fertilising activity for affecting solubility
• C05G 5/12 - Granules or flakes

Abstract

The present invention relates to the field of graphene preparation, and in particular to industrial continuous preparation equipment and process for graphene powder capable of being directly dispersed in an organic system, for use in obtaining the graphene powder capable of being directly dispersed in the organic system, which is composed of reduced graphene oxide and oil-soluble polymer micro-nano particles tightly coated on the reduced graphene oxide, wherein a part of the oil-soluble polymer micro-nano particles are, by means of a π-π conjugation effect, tightly combined with hexagonal honeycomb lattices formed by sp2 hybrid orbits in the reduced graphene oxide, and the other part of the oil-soluble polymer micro-nano particles are combined with oxygen-containing functional groups in the reduced graphene oxide by means of a covalent effect. On one hand, the surface of the reduced graphene oxide can be tightly coated with the oil-soluble polymer micro-nano particles, such that agglomeration of the reduced graphene oxide in a spray drying process is effectively prevented. On the other hand, the dried graphene powder can be easily dispersed after being transferred into the organic system, and the dispersion stability can be kept for a long time.

IPC Classes  ?

• B01F 33/82 - Combinations of dissimilar mixers
• B01F 23/80 - After-treatment of the mixture
• B01J 19/18 - Stationary reactors having moving elements inside
• C08F 120/14 - Methyl esters
• C08F 2/26 - Emulsion polymerisation with the aid of emulsifying agents anionic

Abstract

The present invention relates to the technical field of hydrogen fuel power generation, and relates specifically to a hydrogen fuel high-speed rotating magnetofluid power generation device. The device comprises a shaft portion, a cover plate portion, a thin plate portion and a combustion propelling portion. In the device, a hydrogen electrochemical reaction and unionized hydrogen direct combustion are ingeniously utilized, and jet thrust is provided for rotation while a hydrogen catalytic ionization reaction is completed. The advantage of the device is that same has higher efficiency than hydrogen fuel cells, and has high power density, which is suitable for high-power and high-energy power requirements; no key special assemblies are provided, and auxiliary systems such as heat dissipation are not required, breaking the current situation that hydrogen fuel cells are limited by proton exchange membranes and hydrogen internal combustion engines are limited by the low efficiency of a Carnot cycle.

IPC Classes  ?

• F01D 1/32 - Non-positive-displacement machines or engines, e.g. steam turbines with pressure/velocity transformation exclusively in rotor, e.g. the rotor rotating under the influence of jets issuing from the rotor
• F02C 3/16 - Gas-turbine plants characterised by the use of combustion products as the working fluid characterised by the arrangement of the combustion chamber in the plant the combustion chambers being formed at least partly in the turbine rotor
• F02K 7/00 - Plants in which the working-fluid is used in a jet only, i.e. the plants not having a turbine or other engine driving a compressor or a ducted fanControl thereof

Abstract

A rotary ultrasonic grinding machine tool, comprising a rotary ultrasonic grinding spindle (1), an ultrasonic power transmission device (2), a spindle clamping and lifting device (3), and a part clamping and feeding device (4), wherein the rotary ultrasonic grinding spindle (1) comprises a grinding wheel (101) mounted at an output end of an amplitude transformer (103); a mandrel at a large end of the amplitude transformer (103) extends into a hollow sleeve (106) to be connected to an output end face of a transducer (107); the transducer (107) is connected to an inner surface of the hollow sleeve (106) in a transition fitting manner by means of a positioning flange (109); the hollow sleeve (106) is mounted in a supporting base (102); and a tail end of the hollow sleeve (106) is connected to an electric spindle (112) by means of a coupler (111). Further comprised is a method for using the rotary ultrasonic grinding machine tool. The rotary ultrasonic grinding spindle is directly driven by the electric spindle, thereby improving the grinding efficiency, reducing the grinding force and grinding heat, and improving the part machining quality.

IPC Classes  ?

• B24B 1/04 - Processes of grinding or polishingUse of auxiliary equipment in connection with such processes subjecting the grinding or polishing tools, the abrading or polishing medium or work to vibration, e.g. grinding with ultrasonic frequency
• B24B 41/06 - Work supports, e.g. adjustable steadies
• B24B 41/04 - HeadstocksWorking-spindlesFeatures relating thereto
• B24B 47/20 - Drives or gearings for grinding machines or devicesEquipment therefor relating to feed movement

Abstract

A ducted fan device integrated with a permanent magnet synchronous disc-type flat wire electric motor, comprising a rotor system, a stator system, an intake/exhaust control system, a detection system, a drive system and a power supply system. The stator system comprises an electric motor housing (5). Upper and lower end faces of an inner wall of the electric motor housing (5) are each provided with a flat wire coil (4), and the flat wire coils (4) on the end faces are connected in series. The rotor system is arranged inside the stator system, and the rotor system comprises axial and radial composite integrated blades (1) and permanent magnets (3). The permanent magnets (3) replace a portion of centrifugal fan blades and are located on the outside. The detection system is electrically connected to the electric motor housing (5) and the power supply system. The drive system is electrically connected to the flat wire coils (4) and the power supply system. The detection system is electrically connected to the drive system. The present device implements the suspension and high-speed rotation of the rotor system, omits a bearing mechanism, reduces weight, reduces mechanical wear and noise, prolongs the service life, and reduces costs.

IPC Classes  ?

• H02K 21/14 - Synchronous motors having permanent magnetsSynchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
• H02K 1/27 - Rotor cores with permanent magnets
• H02N 15/00 - Holding or levitation devices using magnetic attraction or repulsion, not otherwise provided for
• F04D 25/08 - Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation

Abstract

Disclosed is a large-field-of-view high-resolution imaging device, comprising: an imaging array formed by splicing and combining a plurality of imaging units, and a CsI fluorescent screen. Each imaging unit is formed by coupling a series light cone array and an enhanced CCD; the series light cone array is used for conducting a light signal and is formed by connecting a large light cone and a small light cone in series, a small end surface of the large light cone is connected to a large end surface of the small light cone in series, and the large end surface of the large light cone is attached to the CsI fluorescent screen; the small end surface of the small light cone is used as an input window of an image enhancer; the enhanced CCD is formed by coupling the image enhancer and a CCD camera; the image enhancer is used for increasing detection efficiency and improving image brightness and contrast; the CCD camera is used for converting an optical signal into an electric signal and storing imaging information in the form of a digital signal; and a photosensitive screen of the CCD camera is used as an output window of the image enhancer.

IPC Classes  ?

• H04N 5/225 - Television cameras
• H04N 5/217 - Circuitry for suppressing or minimising disturbance, e.g. moire or halo in picture signal generation
• G03B 42/02 - Obtaining records using waves other than optical wavesVisualisation of such records by using optical means using X-rays

Abstract

Provided are an ion thruster and method for fabrication thereof, the ion thruster fabrication method comprising: a plurality of prefabricated ceramic tiles (p) are stacked and laminated to form a front part (51); a plurality of prefabricated ceramic tiles (p) are stacked and laminated to form a rear part (B); assembling the front part (51) and the rear part (B) in a sintering mold, the front part (51) fitting closely with a tapered part (b1) of the rear part (B); placing a main cathode (1) into a cathode hole (k1) on the front part, and filling the cathode hole (k1) with a ceramic slurry to fix the main cathode (1); placing the sintering mold in a heating furnace for sintering. The ion thruster employs a modular processing method; when each module is manufactured, a method of stacking a plurality of prefabricated ceramic tiles (p) together and laminating them is used; the invention has the advantages of a simple process and low cost, and the fabricated ion thruster is small in size and has good high-temperature resistance.

IPC Classes  ?

• F03H 1/00 - Use of plasma to produce a reactive propulsive thrust

Abstract

A multi-parameter surface acoustic wave sensing device and a manufacturing method therefor. The multi-parameter surface acoustic wave sensing device comprises a high-temperature-resistance piezoelectric crystal substrate (1), and a first resonator (2), a second resonator (3) and a third resonator (4) provided away from one another; a cantilever beam (11) and a sealed cavity (12) are formed on the high-temperature-resistance piezoelectric crystal substrate (1), and the high-temperature-resistance piezoelectric crystal substrate (1) has a flat first surface (S1) and an opposite second surface (S2); the first resonator (2) is formed on the first surface (S1) corresponding to the cantilever beam (11) and used for sensing a vibration parameter; the second resonator (3) is formed on the first surface (S1) corresponding to the cavity (12) and used for sensing a pressure parameter; the third resonator (4) is formed on the first surface (S1) and used for sensing a temperature parameter; response antennas (5) are formed on the second surface (S2), and the response antennas (5) are electrically connected to the first resonator (2), the second resonator (3), and the third resonator (4). The multi-parameter surface acoustic wave sensing device can be used for parameter measurement in a plurality of positions such as engine combustors, aircraft and spacecraft surfaces, engines, and aircraft wings.

IPC Classes  ?

• G01D 5/48 - Mechanical means for transferring the output of a sensing memberMeans for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for convertingTransducers not specially adapted for a specific variable using wave or particle radiation means
• G01M 15/05 - Testing internal-combustion engines by combined monitoring of two or more different engine parameters
• G01K 11/26 - Measuring temperature based on physical or chemical changes not covered by group , , , or using measurement of acoustic effects of resonant frequencies
• G01L 1/16 - Measuring force or stress, in general using properties of piezoelectric devices

Abstract

The present invention relates to the technical field of film heat-flow sensors, and provides a 3D direct-writing aluminum oxide ceramic film heat-flow sensor and a manufacturing method therefor having high potential signal and sensitivity and short response time and capable of stably working in a high temperature environment to realize stable reading of a thermoelectric potential signal. The technical solution is as follows: a 3D direct-writing aluminum oxide ceramic film heat-flow sensor comprises an upper temperature gradient isolation layer, an upper thermocouple pile, a positive lead-out electrode, a connector, a micron-order ceramic substrate, a lower thermocouple pile, a negative lead-out electrode, and a lower temperature gradient isolation layer. The upper thermocouple pile generated by 3D printing is formed on the upper surface of the micron-order ceramic substrate. The upper thermocouple pile is coated with the upper temperature gradient isolation layer. The lower thermocouple pile generated by 3D printing is formed on the lower surface of the micron-order ceramic substrate. The lower thermocouple pile is coated with the lower temperature gradient isolation layer. The present invention can be applied to the field of temperature gradient measurement.

IPC Classes  ?

• G01K 17/20 - Measuring quantity of heat conveyed by flowing media, e.g. in heating systems based upon measurement of temperature difference across a radiating surface, combined with ascertainment of the heat-transmission coefficient
• G01K 7/02 - Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat using thermoelectric elements, e.g. thermocouples

Abstract

An optical fiber Fabry-Perot sensor (1), and a manufacturing method thereof. The optical fiber Fabry-Perot sensor (1) comprises: a hollow tubular member (10) having a first tubular member (11), a cavity portion (12), and a second tubular member (13) sequentially arranged in an axial direction; a first optical fiber (20) provided within the first tubular member (11) in the axial direction, the first optical fiber (20) having a first light-transmitting end surface (21) provided within the cavity portion (12); and a second optical fiber (30) provided in the second tubular member (13) in the axial direction and having a second light-transmitting end surface (31) provided within the cavity portion (12), wherein the first light-transmitting end surface (30) and the second light-transmitting end surface (31) are spaced apart by a pre-determined distance and opposingly arranged, and the inner diameter of the cavity portion (12) is greater than the diameter of any one of the first tubular member (11) and the second tubular member (13).

IPC Classes  ?

• G01L 1/24 - Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis
• G01B 11/16 - Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
• G01L 11/02 - Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group or by optical means

Abstract

The invention discloses a silicon-based monolithic integrated sonar array which includes a cantilevered sensing array structure, a sound-transparent jacket, and a support structure. The cantilevered sensing array structure is fixed on the support structure and in the sound-transparent jacket, wherein the sound-transparent jacket is filled with insulating dielectric oil, and the cantilevered sensing array structure is immersed in the insulating dielectric oil. The sound-transparent jacket is sealed and is treated with water tightness processing. The array can be applied into devices for underwater ultrasonic imaging, ultrasonic ranging, torpedo navigating, etc.

IPC Classes  ?

• G01S 7/52 - Details of systems according to groups , , of systems according to group

Abstract

A speckle removal device relating to the technical field of display having a coherent light as a light source, based on Mie scattering and motion of magnetically controlled particles, solves the problems in the prior art of bad speckle removal effect, complex structure, high cost, and being easily damaged. The speckle removal device (300) comprises a closed optical reflective chamber (302) disposed with an incident optical coupler device (301) and a projection emergent surface (303). The inner walls of the closed optical reflective chamber (302) are all mirrors except the inner wall of the projection emergent surface (303). The inside of the closed optical reflective chamber (302) is filled with a solution or a sol (401). Dispersed inside of the solution or sol (401) are magnetic medium particles (402) having a linear dimension that triggers Mie scattering on an incident laser. Disposed for the closed optical reflective chamber (302) is a magnetic field generation device for generating a magnetic field. The electromagnet (308) of the magnetic field generation device is disposed outside of the closed optical reflective chamber. The speckle removal device has a logical, compact structure, high speckle removal effect, and is safe, reliable, and easy to implement at a low cost. The device has high laser utilization rate and stability, and makes illumination even.

IPC Classes  ?

• G02B 27/48 - Laser speckle optics

Abstract

Disclosed is a speckle removal device (300) based on Mie scattering and an optical part. The speckle removal device (300) comprises: an optical reflective chamber (302) disposed with an incident optical coupler device (301) and an emergent surface (303), and an optical part (308) disposed facing the incident optical coupler device (301) of the optical reflective chamber (302). The optical part (308) is an optical part that changes the incident angle of light beams. The inner walls of the optical reflective chamber (302) are all mirrors except the inner wall of the emergent surface. The inside of the optical reflective chamber (302) is completely filled with a transparent solid matter (401), and dispersed inside of the transparent solid matter (401) are medium particles (402) that trigger Mie scattering on an incident laser. The speckle removal device (300) has a compact structure, high speckle removal effect, high laser utilization rate, and stability, and makes illumination even.

IPC Classes  ?

• G02B 27/48 - Laser speckle optics

Abstract

Disclosed is a speckle removal device (300) based on Mie scattering and a polymer of field-induced deformation. The speckle removal device (300) comprises an optical reflective chamber (302) disposed with an incident optical coupler device (301) and an emergent surface (303), and a transparent solid matter (402) that fills completely inside of the optical reflective chamber (302). The inner walls of the optical reflective chamber (302) are all mirrors except the inner wall of the emergent surface. Dispersed inside of the transparent solid matter (401) are medium particles (402) that trigger Mie scattering on an incident laser. The transparent solid matter (401) is a polymer of field-induced deformation. The optical reflective chamber (302) is disposed with an actuating device for generating an external field needed for the polymer inside of the chamber. The speckle removal device (300) has a compact structure, high speckle removal effect, and is easy to implement at a low cost. The device has is stable, safe, and reliable, and makes illumination even.

IPC Classes  ?

• G02B 27/48 - Laser speckle optics

Abstract

Disclosed is a speckle removal device (300) based on Mie scattering and Brownian motion. The speckle removal device (300) comprises a closed optical reflective chamber (302) disposed with an incident optical coupler device (301) and an emergent surface (303). The inner walls of the closed optical reflective chamber (302) are all mirrors except the inner wall of the emergent surface (303). The inside of the closed optical reflective chamber (302) is completely filled with a solution or a sol (401), and dispersed inside of the solution or sol (401) are medium particles (402) that trigger Mie scattering on an incident laser. The speckle removal device (300) has a compact structure, high speckle removal effect, and is safe, reliable, and easy to implement at a low cost. The device has high laser utilization rate and stability, and makes illumination even.

IPC Classes  ?

• G02B 27/48 - Laser speckle optics

Abstract

Disclosed is a speckle removal device (300) based on a polymer of field-induced deformation. The speckle removal device (300) comprises a light pipe (301) having reflective mirrors as its inner walls, a polymer of field-induced deformation (400) disposed inside of the light pipe, and an actuating device for generating the external field needed to drive the deformation of the polymer inside of the light pipe; a space (302) exists between the polymer of field-induced deformation (400) and the inner walls of the light pipe (301); the actuating device comprises at least two external field exertion components (200) inside or outside of the light pipe (301). The speckle removal device (300) has a compact structure, high speckle removal effect, and is easy to implement at a low cost. The device has high laser utilization rate and stability, and makes illumination even.

IPC Classes  ?

• G02B 27/48 - Laser speckle optics

Abstract

Disclosed is a speckle removal device (300) based on Mie scattering and perturbation drive. The speckle removal device (300) comprises an optical reflective chamber (302) disposed with an incident optical coupler device (301) and an emergent surface (303), and an optical part (308). The optical part (308) faces the incident optical coupler device (301) of the optical reflective chamber (302). The inner walls of the optical reflective chamber (302) are all mirrors except the inner wall of the emergent surface (303). The inside of the optical reflective chamber (302) is completely filled with a transparent matter (401), and dispersed inside of the transparent matter (401) are medium particles (402) that trigger Mie scattering on an incident laser. Either the optical reflective chamber (302) or the optical part (308) is disposed with a perturbation-sensitive device or both the optical reflective chamber (302) and the optical part (308) are disposed with a perturbation-sensitive device. The speckle removal device (300) has a compact structure, high speckle removal effect, and is easy to implement at a low cost. The device has high laser utilization rate and stability, and makes illumination even.

IPC Classes  ?

• G02B 27/48 - Laser speckle optics