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Foldable six-axis multi-rotor aircraft
The invention relates to a foldable six-axis multi-rotor c belonging to the field of aviation aircrafts. The foldable six-axis multi-rotor aircraft comprises an aircraft body, motors, six groups of motor mounting hoods, rotors and six supporting arms, wherein a motor is mounted in each motor mounting hood, rotors are arranged outside the motor mounting hood and connected with the motor, the aircraft body is connected with each motor mounting hood through the supporting arms, an aircraft control system, a sensor, a batter and an oil supply system are mounted in the aircraft body, and the six supporting arms comprise two fixed supporting arms and four rotary supporting arms. Through the dual folding structure comprising the horizontal rotary folding of the four supporting arms and the vertical rotary folding of the six supporting arms, the aircraft has smaller geometrical size, is convenient to store and effectively solves the problems of inconvenient carrying and transportation of the multi-axis multi-rotor aircraft.
Owner:CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
Integrated circuit wafer packaging system and method
InactiveUS20050269241A1Eliminate any forceEliminate and seriously minimize motionInternal framesSemiconductor/solid-state device manufacturingQuality assuranceIntegrated circuit
A packaging system, hereinafter referred to as the Critical Packaging System, relates to critical issues that associate with sensitive articles such as IC wafers before, during and after shipment phases. The system employs a choice of two or more specialty designed containers, and any one selected design having choices of two or more methods by which to avoid, reduce and / or eliminate wafer damage from breakage, scratches and / or corrosion during shipment phases. For the purpose of maximizing product yield during packaging phases a special apparatus is used to insert wafers within containers without scratch damage. The following programs are used in packaging: (1) Quality Assurance / Certification, (2) Critical Factor Monitoring, and (3) a Recycle and Refurbish Program. These programs are specifically designed to achieve new levels of product yields, reduce product cost, and landfill impact.
Owner:CONVEY INC
Systems and methods for fabricating self-aligned memory cell
ActiveUS20120122290A1High densityLow costSolid-state devicesSemiconductor/solid-state device manufacturingMetallic electrodeMemory cell
Systems and methods are disclosed to form a resistive random access memory (RRAM) by forming a first metal electrode layer; depositing an insulator above the metal electrode layer and etching the insulator to expose one or more metal portions; depositing a Pr1-XCaXMnO3 (PCMO) layer above the insulator and the metal portions, wherein X is between approximately 0.3 and approximately 0.5, to form one or more self-aligned RRAM cells above the first metal electrode; and depositing a second metal electrode layer above the PCMO layer.
Owner:4D S
Novel thyristor converter valve module
ActiveCN101719719AReduce weightSmall geometryConversion constructional detailsElectric power transfer ac networkCapacitanceMechanical engineering
Owner:CHINA ELECTRIC POWER RES INST
Microcomputer electric stacking type millimeter wave antenna
ActiveCN101141023AReduce distractionsHigh bandwidthDecorative surface effectsRadiating elements structural formsMicrocomputerAnisotropic substrate
The invention provides a micro electromechanical cascade millimeter wave antenna, comprising an upper anisotropic substrate, a middle anisotropic substrate and a lower anisotropic substrate. The upper surface deposit of the upper anisotropic substrate is provided with metal and forms a first metal radiation patch by mechanical erosion. The upper surface deposit of the middle anisotropic substrate is provided with metal and forms a second metal radiation patch by mechanical erosion. The upper surface deposit of the lower anisotropic substrate is provided with metal and forms a FGCPW-MS feeder or a MS feeder by mechanical erosion. The upper anisotropic substrate, the middle anisotropic substrate and the lower anisotropic substrate form a unit by MEMS bonding technology. The antenna has small size and light weight, which is also easy for the further integration.
Owner:NO 55 INST CHINA ELECTRONIC SCI & TECHNOLOGYGROUP CO LTD
Method and system for precisely positioning a waist of a material-processing laser beam to process microstructures within a laser-processing site
InactiveUS20050199598A1Reduce the required powerPrecise positioningSemiconductor/solid-state device manufacturingPhotomechanical exposure apparatusAir bearingLaser processing
Owner:ELECTRO SCI IND INC
Angular bevel gear mechanism
ActiveCN101782129AReduced structureSmall geometryPortable liftingToothed gearingsDrive wheelElectric machine
Owner:SOUTH CHINA UNIV OF TECH
Integrated Circuit Device
InactiveUS20070181913A1Small geometryImprove equipment reliabilityThermoelectric device with peltier/seeback effectSemiconductor/solid-state device manufacturingSolid substrateElectron
A commercially mass-produced, integrated circuit including: a solid substrate of one conductivity type; at least one solid material pocket of a different conductivity type having a side surface and positioned on a selected top surface of the substrate to thereby form a signal-translating, electronic rectifying barrier between the at least one solid material pocket and the selected top surface of the substrate; and a solid state material region adjoining the substrate, the electronic rectifying barrier, and the side surface of the at least one solid material pocket; wherein next to the electronic rectifying barrier the solid state material region has a lateral dimensional accuracy of better than a few hundred atomic layers.
Owner:LI CHOU H
Integrated circuit wafer packaging system and method
InactiveUS7578392B2Reduce yieldReduce scratchesInternal framesSemiconductor/solid-state device manufacturingQuality assuranceMulti method
A packaging system, hereinafter referred to as the Critical Packaging System, relates to critical issues that associate with sensitive articles such as IC wafers before, during and after shipment phases. The system employs a choice of two or more specialty designed containers, and any one selected design having choices of two or more methods by which to avoid, reduce and / or eliminate wafer damage from breakage, scratches and / or corrosion during shipment phases. For the purpose of maximizing product yield during packaging phases a special apparatus is used to insert wafers within containers without scratch damage. The following programs are used in packaging: (1) Quality Assurance / Certification, (2) Critical Factor Monitoring, and (3) a Recycle and Refurbish Program. These programs are specifically designed to achieve new levels of product yields, reduce product cost, and landfill impact.
Owner:CONVEY INC
High temperature-pressure radiation heat flow meter
InactiveCN101571429AExpand the testing angleSmall geometryCalorimeterConvex structureHeat conducting
A heat flow meter of wall pure radiation heat flow in high temperature-pressure environment is characterized in that a sapphire crystal window is adopted for insulating the influences of convection and heat conducting, and a heat flow meter which determines radiation heat flow by measuring axial thermoelectric force of a heat absorption cylinder is adopted. The adopted sapphire crystal window is in single-sided convex structure which can effectively expand measurement visual angle, accurate design is carried out on a round window chamfer angle, thus further expanding the measuring angle of the radiation heat flow meter to be 150 degrees. The sapphire crystal window insulates the influences of two heat flows of convection and heat conducting to make the heat flow meter measure radiation heat flow only. The lower surface of a heat receiver is provided with a cooling construction to cool the lower surface thus causing the heat receiver to form stable axial temperature distribution, and the pure radiation heat flow of wall is obtained by measuring the temperature difference of the upper surface and the lower surface of the heat receiver.
Owner:BEIHANG UNIV
Radial sliding seal component for metering devices and metering device having such a radial sliding seal component
ActiveUS8557197B2Optimization definitionSmall geometryEngine sealsPiston ringsContact formationEngineering
The invention relates to a radial sliding seal component (10), particularly for use in metering devices, such as syringes, pipetting piston-cylinder arrangements, and the like, comprising a sealing component (12) working together with at least one pretensioning component (14), wherein the sealing component (12) comprises a sealing segment (16) extending in the axial direction and in the circumferential direction, preferably running in the circumferential direction, on which a sealing surface (18) facing in a first radial direction for sealing and sliding contact in at least the axial direction is formed on a working surface extending in the axial direction and in the circumferential direction, preferably running in the circumferential direction, and on which a pretensioning surface (20) extending in a second radial direction opposite to the first is formed for engaging with the pretensioning component (14) for transferring the radial pretensioning force, wherein the pretensioning component (14) comprises a spring carrier (26) and a plurality of separately formed radial spring segments (22) compliantly supported at least in the radial direction on the spring carrier (26).
Owner:HAMILTON BONADUZ AG
Variant structure leg wheeled exploration robot
The invention is a kind of variable structure leg and wheel type detecting robot, which uses variable parallelepiped car body, uses electric engine to drive the car body to be widened or be narrowed; the invention uses running mechanism of leg and wheel transition, the four legs can extended fully, becomes foot walking detecting robot, the four legs can be folded according to a definitive method, it is deformed into wheel detecting car. The invention combines the deformation of the car, the change of car height and the inversion of the leg and wheel, it has several change modes. The invention combines deformable and height adjustable car, foot walking mechanism, wheel running mechanism.
Owner:BEIHANG UNIV
Foldable six-axis multi-rotor aircraft
The invention relates to a foldable six-axis multi-rotor c belonging to the field of aviation aircrafts. The foldable six-axis multi-rotor aircraft comprises an aircraft body, motors, six groups of motor mounting hoods, rotors and six supporting arms, wherein a motor is mounted in each motor mounting hood, rotors are arranged outside the motor mounting hood and connected with the motor, the aircraft body is connected with each motor mounting hood through the supporting arms, an aircraft control system, a sensor, a batter and an oil supply system are mounted in the aircraft body, and the six supporting arms comprise two fixed supporting arms and four rotary supporting arms. Through the dual folding structure comprising the horizontal rotary folding of the four supporting arms and the vertical rotary folding of the six supporting arms, the aircraft has smaller geometrical size, is convenient to store and effectively solves the problems of inconvenient carrying and transportation of the multi-axis multi-rotor aircraft.
Owner:CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
Chip cooling system
ActiveCN104851857AReduce the temperatureLow boiling pointSemiconductor/solid-state device detailsSolid-state devicesHeat fluxEngineering
The invention relates to a chip cooling system, which comprises a chip heat conduction plate used for primary heat exchange, and an annular heat pipe used for secondary heat exchange, wherein a plurality of micro-channels are arranged on the chip heat conduction plate side by side, the micro-channels are connected with a circulating pipeline provided with a pump simultaneously to form a circulating loop, and the circulating loop is filled with liquid I; and the annular heat pipe is sleeved in the circulating loop to form a sleeving structure, the annular heat pipe is filled with liquid II and gas, and the pressure intensity of the gas is always less than the atmospheric pressure intensity. The chip cooling system combines the micro-channels with the annular heat pipe to form a two-stage heat exchange system, the micro-channels can provide large radiating heat flux and can absorb heat on the chip timely, the annular heat pipe fully utilizes effects such as phase change and gravity as a driving force, the radiating efficiency is high, and the cost is low; and the heat passes through the circulating loop and the annular heat pipe from the chip and is radiated to the environment, the radiating power is high, and the effect is good.
Owner:东营慧达科技创业服务有限公司
Quantum dot array spectrum sensor
InactiveCN106768331AHigh wavelength resolutionThe number of encoding bits increasesSpectrum investigationPhotovoltaic detectorsLight sensing
The invention discloses a quantum dot array spectrum sensor, comprising: a quantum dot colloidal array film and an array photoelectric detector; the quantum dot colloidal array film is used for bearing a quantum dot colloidal array; the quantum dot colloidal array includes a plurality of quantum dot colloidal units, wherein at least one quantum dot colloidal unit has a different absorbing or transmitting spectrum from other quantum dot colloidal units; the side of the quantum dot colloidal array film bearing the quantum dot colloidal array is opposite to a light-sensing side of the array photoelectric detector; after measured light of measured spectrum irradiates the quantum dot colloidal array film, transmitting light passing through the quantum dot colloidal array is detected by the light-sensing side. With the cooperation of the quantum dot colloidal array and the array photoelectric detector, the quantum dot array spectrum sensor has great bandwidth, high wavelength resolution and good sensitivity to weak light, and properties of existing instruments are improved greatly.
Owner:杭州盗火者科技有限公司
Apparatus and method for measuring the surface temperature of continuous casting billet/slab
ActiveUS20100236743A1Small geometryUneven thicknessThermometer detailsCasting safety devicesData processing systemRadiation thermometer
The present invention discloses a method and apparatus for measuring the temperature field on the surface of casting billet / slab, including: a thermal imager, an infrared radiation thermometer, a mechanical scanning unit, an image and data processing system; the thermal imager, the infrared radiation thermometer and the mechanical scanning unit are respectively connected to the image and data processing system; the infrared radiation thermometer is installed on the mechanical scanning unit and can measure the temperature of casting billet / slab surface by scanning; the thermal imager can measure the temperature of a certain area on the surface of casting billet / slab by thermal imaging. The present invention makes use of the combination of high-resolution thermal imager and scan-type infrared radiation thermometer, through the model-based filtering method, overcomes the influence of iron scales on the surface of casting billet / slab, and implements real-time stable measurement of surface temperature of casting billet / slab.
Owner:NORTHEASTERN UNIV +1
Microphone device capable of conducting adapterization from long distance
ActiveCN102395066ASmall geometrySimple structureMouthpiece/microphone attachmentsEngineeringSignal processing
The invention discloses a microphone device capable of conducting adapterization from long distance, which comprises two microphones and a casing, wherein the two microphones are connected in parallel and then are placed into the casing; a front voice inlet hole is arranged in front of the casing, and a rear voice inlet hole is arranged in the side surface of the casing. Compared with the existing devices capable of conducting adapterization from long distance, in the invention, the high directionality of the microphone is realized, simultaneously, the physical dimension is greatly reduced, and no signal processing and algorithms are needed in the realization process, therefore, the record device is simple in structure, small and exquisite in dimension, low in cost and easy to realize.
Owner:李金来
Driver device and display device
InactiveUS20070007650A1Low production costReduce film costSemiconductor/solid-state device detailsSolid-state devicesElectrical and Electronics engineeringDisplay driver
Disclosed is a device which comprises a substrate, a plurality of signal output terminal electrodes provided on the substrate, a plurality of signal input terminal electrodes provided on the substrate, and a display driver IC having input terminals thereof connected to the signal input terminal electrodes and output terminals thereof connected to the signal output terminal electrodes. A plurality of output terminals (first, third, fifth, . . . (i+1)th, and (n−1)th) are included on a first side of the display driver IC facing the signal input terminal electrodes. A second side on an opposite side of the first side faces the signal input terminal electrodes. Input terminals 22 are included in at least one segment of the second side, and output terminals (second, fourth, sixth, ith, jth, (j+2)th, (n−2)th, and nth) are included in at least one portion of the remaining segment of the second side. One output terminal on the second side passes between two of the output terminals on the first side that correspond to the one output terminal and is connected to a corresponding one of the signal output terminal electrodes through a corresponding one of wiring that passes through the underside of the display driver IC.
Owner:RENESAS ELECTRONICS CORP
Hook rod gear mechanism for parallel shaft transmission
The invention relates to a hook rod gear mechanism for parallel shaft transmission. The hook rod gear mechanism comprises a transmission pair composed of a driving wheel and a driven wheel. The axis of the driving wheel and the axis of the driven wheel are parallel to each other. The driving wheel is connected with an input shaft. The driven wheel is connected with an output shaft. Driving hook rods on the driving wheel are evenly distributed in the circumference of the cylindrical end face of the driving wheel. Driven hook rods on the driven wheel are also evenly distributed in the circumference of the cylindrical end face of the driven wheel. The driving hook rods and the driven hook rods are each in a cylindrical spiral linear shape. When the driving wheel and the driven wheel are installed, the driving hook rod and the driven hook rod in one pair are meshed, the driving wheel is driven by a driver to rotate, the continuous and stable meshing is completed through the meshed hook rods, and transmission between the two parallel shafts is achieved. The spiral linear shapes of the driving hook rods and the driven hook rods can be determined according to the installation spatial coordinate system, the transmission ratio and other parameters of the driving wheel and the driven wheel and according to the hook rod contact line equation. The hook rod gear mechanism is simple in structure, fewer in transmission mechanism part, small in size, light in weight, large in transmission ratio, stable in transmission and suitable for being applied to the fields of mini machines and micro machines.
Owner:CHINA UNIV OF GEOSCIENCES (WUHAN)
Potential type micro electrode sensor capable of being used for ion detection in settlings and application thereof
ActiveCN108398474ALow detection limitRealize detectionMaterial analysis by electric/magnetic meansPolyvinyl chlorideSite analysis
The invention relates to a potential type micro electrode sensor, in particular to a potential type micro electrode sensor capable of being used for ion detection in settlings and application thereof.The potential type micro electrode sensor is a polymer film ion selective micro electrode, and consists of a gold micro electrode, a PEDOT (PSS) conduction layer and an iron selective polymer film; the iron selective polymer film is prepared by mixing ion selective carriers containing ions to be detected and lipophilic ion exchangers (quadri(3,5-bis(trichloromethyl)phenyl)sodium borate accordingto the mol ratio of (1:2)-(1:4) and then adding polyvinyl chloride and o-nitrophenyl octyl ether. The solid contact type micro electrode has the advantages that the manufacturing is simple and convenient; the sensitivity is high; the cost is low; the miniaturization is easy, and the like. Meanwhile, the micro electrode mass transfer speed is high; the current density is great; the response speed is high, and the like. The ion field in-site analysis in settlings can be realized; the detection on various ions in the settings can be realized through changing the types of ion carriers in the ion selective films.
Owner:YANTAI INST OF COASTAL ZONE RES CHINESE ACAD OF SCI
Ultra short span quasi-eight-wood metal-resistant antenna and electronic label using the same
ActiveCN101330170AIncrease reading and writing distanceHigh gainRadiating elements structural formsRecord carriers used with machinesHigh volume manufacturingDielectric plate
The invention discloses an ultra-short spacing quasi-Yagi anti-metal antenna which comprises a director dipole, a first dielectric plate, an active dipole, a second dielectric plate and a reflector laminated sequentially. The director dipole and the active dipole are metal thin layers, on which a multi-folded vibrator image is etched. The reflector is a metal thin layer. The metal thin layers of the active dipole, the director dipole and the reflector are in parallel to each other. The active dipole and the director dipole are in staggered arrangement and the central axis in the normal direction of the active dipole and the director dipole are not coincident to each other. The interfering energy caused by a metal object is converted into the available component for increasing the read-write distance of an RFID device. Meanwhile, the complex structure, such as EBG, is avoided, and a planar folding structure with convenient manufacture can be realized by adopting the simple printed circuit manner. Moreover, the adopted high-frequency dielectric plate belongs to the domestic products in mass production with low cost. In addition, compared with the conventional quasi-Yagi antenna, the quasi-Yagi anti-metal antenna has the advantages of greatly reduced size and anti-metal performance while maintaining high gain.
Owner:南通云创投资有限公司
Six-rotor aircraft rack capable of being folded and expanded automatically
An aircraft rack capable of being folded and expanded automatically is designed through inspiration from a mechanical aperture tuning device of a camera lens and is composed of a central worm-and-gear gear motor, an upper central plate, a lower central plate, a crank, a connecting rod, a plurality of supporting arms and a rotor baffle so that a six-rotor aircraft can be folded to form a compact regular hexagon structure in a manner of being driven by a motor arranged at the centre of the rack. Top parts of adjacent rotors are arranged as close as possible and are regarded as vertexes of the regular hexagon structure. The positions of the rotors are relatively fixed so that a geometric size of the six-rotor aircraft can be greatly reduced. When the central motor rotates in a reverse direction, the supporting arms of the six rotors can be expanded automatically.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY
Cable production process
InactiveCN104217818AAvoid scratchesReduce toughnessCable/conductor manufactureProcess engineeringElectric cables
The invention discloses a cable production process which includes the steps of firstly, single wire drawing; secondly, single wire annealing; thirdly, stranding; fourthly, cabling; fifthly, coating. The production process is reasonable and simple, and the produced cables are resistant to corrosion and oxidation, long in service life, suitable for various severe environments, free of electric leakage and high in safety performance.
Owner:安徽顺驰电缆股份有限公司
Permeability measurement system and method for low-permeability rock ore particles
ActiveCN107655805AEnables Permeability MeasurementsEasy maintenancePermeability/surface area analysisIsolation valveExhaust valve
The invention provides a permeability measurement system and method for low-permeability rock ore particles. The permeability measurement system comprises a high-pressure air source device, a reference cavity, a suction and exhaust valve and two symmetrically-arranged sample side devices; each sample side device comprises a sample cavity, an isolation valve and a balance valve, the sample cavity is communicated with the reference cavity through a circulation pipeline to receive high pressure air transmitted from the reference cavity; the isolation valve is arranged at the position of the circulation pipeline and close to the sample cavity; the balance valve is arranged at the position of the circulation pipeline and close to the reference cavity; the two sample cavities are respectively used for accommodating to-be-detected low-permeability rock ore particles and impermeable solids, the impermeable solids and the to-be-detected low-permeability rock ore particles are identical in particle size and volume, and the sample side devices are arranged at the same height. The permeability measurement system is simple and easy to maintain, small in dimension and high in safety; the permeability measurement system and method has the advantages that credibility and measurement precision of permeability of low-permeability rock ores are remarkably increased.
Owner:苏州开洛泰克科学仪器科技有限公司
Orthopaedic surgery robot based on non-invasive type real-time surgery positioning navigation device
ActiveCN105434048ASmall geometryNo lost work tripsSurgical robotsInstruments for stereotaxic surgeryNon invasiveSurgery
The invention relates to an orthopaedic surgery robot based on a non-invasive type real-time surgery positioning navigation device. The robot is characterized by comprising a surgery bed, a fixing device, an executing mechanism, a mechanical arm and a mechanical hand, the fixing device is arranged on the surgery bed in a sliding mode, the executing mechanism is arranged above the fixing device, the mechanical arm is arranged on one side of the executing mechanism, and the mechanical hand is clamped in the mechanical arm. The mechanical hand is used for implementing the piercing movement of a steel needle which has the diameter of 2 mm and rotates at a high speed, and the final surgery channel is established. The mechanical hand comprises a steel needle clamping mechanism, a high-speed rotating mechanism and an axial movement mechanism, wherein the core working principle of the steel needle clamping mechanism is the centrifugal principle. When the high-speed rotating mechanism drives a main shaft to rotate at a high speed, a centrifugal clamping device of the steel needle clamping mechanism starts to work, that is, the steel needle clamping mechanism clamps the steel needle, and the movement of putting down the steel needle in a segmented mode can be achieved. Due to the working mode, the mechanical hand can have the dual advantages that the geometrical size of the mechanical hand is reduced and meanwhile no working stroke loss exists.
Owner:HANGZHOU SANTAN MEDICAL TECH
High-temperature thin-film thermocouple temperature sensor
InactiveCN104748876AReduce volumeReduce weightThermometers using electric/magnetic elementsUsing electrical meansThin film thermocouplesHot Temperature
The invention relates to a high-temperature thin-film thermocouple temperature sensor manufactured by the vacuum film technology. The high-temperature thin-film thermocouple temperature sensor is that the part of which the temperature is to be detected is selected from a high-temperature detecting material; the specific shape of a Pt thermocouple electrode and a PtRh thermocouple electrode; then the processes of processing a metal mask, preparing an Al2O3 insulating layer, preparing a Pt thermocouple film, preparing a PtRh thermocouple and preparing an Al2O3 insulating protecting layer are sequentially carried out to prepare the micron or submicron thin-film thermocouple temperature sensors employing the Pt material and the PtRh material. Compared with the prior art, the high-temperature thin-film thermocouple temperature sensor has the advantages of being reasonable in structure, convenient to operate, long in service life, fast to respond in temperature detection, and high in temperature detection accuracy, and the upper limit of temperature detection is up to 1200 DEG C.
Owner:SHAANXI ELECTRICAL APPLIANCE RES INST
Cable production technology
InactiveCN104795184AAvoid scratchesReduce toughnessCable/conductor manufactureElectric cablesIndustrial engineering
The invention discloses a cable production technology. The cable production technology includes the following steps of 1), monofilament drawing; 2), monofilament annealing; 3), stranding; 4), cabling; 5), wrapping. The cable production technology is reasonable and concise, cables are corrosion resistant, antioxidant, long in service life and applicable to various severe environments, electric leakage never occurs, and safety performance is high.
Owner:中山市鸿程科研技术服务有限公司
Variable pitch control system, variable pitch control method and wind generating set
InactiveCN102758726APitch control implementationSmall geometryWind motor controlMachines/enginesControl systemMaster controller
The invention discloses a variable pitch control system, a variable pitch control method and a wind generating set. The variable pitch control system comprises a main controller, a variable pitch frequency converter component, variable pitch motors, variable pitch reducers and variable pitch bearings, wherein one variable pitch bearing corresponds to each blade; the plurality of variable pitch reducers are respectively driven by a plurality of variable pitch motor shafts; the plurality of variable pitch reducers are respectively meshed with one variable pitch bearing so as to drive the variable pitch bearing to rotate; and the variable pitch frequency converter component which corresponds to each blade comprises a plurality of frequency converters which comprise a master frequency converter and the rest of slave frequency converters and respectively drive the plurality of variable pitch motors. The variable pitch control on blades of a large or an extra-large wind generating set is realized on the basis of not adding electric and mechanical loads of the variable pitch motors and the variable pitch reducers.
Owner:SINOVEL WIND GRP
Amide phosphonic acid metal complex, corresponding composite material and preparation methods thereof
InactiveCN104072542ASmall geometryEasy to produceOrganic chemistryLiquid/solution decomposition chemical coatingPolyoxymethyleneRough surface
The invention discloses amide phosphonic acid metal complex, a corresponding composite material and preparation methods thereof. The structure of the complex is as shown in the formula (A), wherein R is H, CH3, C6H5 or CH2=CH-; M is Cu, Co, Ni, Ba or Sr. The amide phosphonic acid metal complex (A) is prepared by using a corresponding amide compound and formaldehyde (or metaformaldehyde) as raw materials, carrying out reaction between the raw materials and H3PO3, and conducting complexing on the reaction product and corresponding metal ions M. The amide phosphonic acid metal complex (A), a high-frequency medium ceramic additive, thermoplastic resin and the like are mixed; pelletization, injection moulding and forming are conducted on the mixture; after high-energy particle irradiation, a metalized rough surface is formed, so as to conveniently realize circuit wiring, and precipitate metal through chemical plating to further obtain a firmly combined fine three-dimensional molding interconnection device or a three-dimensional circuit (3D-MID). Therefore, various antennae of different uses can be integrated to greatly reduce the geometric dimensioning the antennae or an electronic device, ensure the electronic product to be smaller, lighter, thinner and more flexible, greatly simplify the production process, and obviously reduce the cost.
Owner:SICHUAN NORMAL UNIVERSITY +1
Method for machining steam turbine honeycomb seal with electric sparks
The invention relates to a method for machining a steam (gas) turbine honeycomb seal with electric sparks. The method comprises the following steps of: manufacturing a tool electrode of which the contour line of the working surface is consistent with the section line of the inner arc surface of a honeycomb band of a honeycomb seal; laying the honeycomb seal on side on a work bench of an electrical discharge machine, aligning, centering and fixing; installing the tool electrode on a main shaft of the electrical discharge machine with the working surface of the tool electrode corresponding to the inner arc surface of the honeycomb band, adjusting the discharging gap, starting the machine to feed the tool electrode along the circumferential direction of the inner arc surface of the honeycomb band, carrying out electro-erosion machining on the inner arc surface of the honeycomb band, and removing chips by radial reciprocating movement when the tool electrode is fed along the circumferential direction. The method for machining a steam turbine honeycomb seal has high accuracy and can enable the contour of the machined working surface of the honeycomb band to be circularly machined. After the seal is assembled into a circle, the steam leakage gap is machined at one time, thereby realizing high efficiency. Besides, the tool electrode has the advantages of small geometric size, little material, simple structure, easy machining and low cost.
Owner:DONGFANG TURBINE CO LTD
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