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48results about How to "Clear understanding of technical means" patented technology
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Driver of washer
InactiveCN101074535ANo need to increase sizeNo need to add weightOther washing machinesTextiles and paperWash waterMagnet
This invention relates to the mechanism for the washing machine with dual-rotor motors, its characters includes: barrels used for containing wash water has the rotary drum in the inner side; dual-rotor includes external rotor with magnet supported by the inner surface and the internal rotor, which is installed in the medial external rotor, with magnet by the outer surface; bearing shell formed at the back of the barrel by the method of injection modeling has the bearing for the connection of drum and the drum shaft of dual rotor; motor is fixed behind the barrel by the bracket; the components of stator are as follows: the Core at which sides correspond to the magnets of the external and internal rotors; the coil winded in the outside of the core mentioned; Department of mold, which is exposed in the two sides of the core, is formed outside of the core and coil by the method of injection molding; the fixed department, which is fixed at the back of the bracket fixing for the motor mentioned above, is formed from the extension of above mold department.
Owner:NANJING LG PANDA APPLIANCES
High-resolution and low-spurious-frequency synthesizer of UHF (Ultrahigh Frequency) frequency band
InactiveCN101834604ASolve the technical difficulties that it is difficult to filter the required frequency through the analog filterSolve the accuracy problemPulse automatic controlLow-pass filterQuadrature mixer
The invention relates to a frequency synthesizer, in particular to a high-resolution and low-spurious-frequency synthesizer of a UHF (Ultrahigh Frequency) frequency band, comprising a phase detector, a phase-locked loop, a DDS frequency synthesizer and a quadrature mixer, wherein the phase-locked loop comprises a low-pass filter and a voltage controlled oscillator; the DDS frequency synthesizer is a double-frequency output DDS frequency synthesizer; the phase detector is used for receiving reference signals and dividing the signals, the low-pass filter is connected with the phase detector to supply voltage control signals, a voltage control oscillator is connected with the low-pass filter to supply output signals, the quadrature mixer is coupled among the voltage control oscillator, the DDS frequency synthesizer and the phase detector, and the DDS frequency synthesizer is connected between a reference signal and the quadrature mixer. The frequency synthesizer greatly increases the frequency resolution (0.0024Hz), inhibits stray, reduces the stabilization time and can especially obtain the same high-resolution frequency signals in arbitrary frequency bands.
Owner:BEIJING BBEF SCI & TECH
End processing method of multi-strand excitation wire
ActiveCN101902007AImprove reliabilityWidely used valueConnection formation by deformationMulticonductor cable end piecesNeck partsCopper
The invention relates to a wire end processing method, in particular to an end processing method of a multi-strand excitation wire. The method comprises the following steps of: (1) peeling end insulation parts; (2) fixing end core wires into a whole; (3) cutting the end face into an inclined plane; (4) welding a copper pipe and the core wire end face; (5) connecting welding pieces; (6) inspecting; and (7) insulating a neck part. The method improves the reliability of conductive connection of the welding pieces and the multi-strand excitation wire.
Owner:BEIJING 761 COMM RADAR
Lens and light source device with the same
InactiveCN101451675AReduce light intensityIncrease light intensityPoint-like light sourceRefractorsRough surfaceLight field
The invention provides a lens and a light source device with the lens; wherein, the lens which is used for receiving light rays given out by a luminous semiconductor component comprises a bottom surface, a top surface and a side surface; the bottom surface is opposite to the luminous semiconductor component to receive light rays; the top surface is reversed to the bottom surface and comprises a rough surface structure which causes part of light rays which go through the bottom surface and is incident to the top surface instead of going to the right above of the top surface; the side surface extends to the peripheral part of the bottom surface form the peripheral part of the top surface and the light rays which go through the bottom surface and are incident to the side surface are irradiated out of the lens; the shape of the lens is gradually enlarged from the junction of the top surface and the side surface to the direction of the bottom surface; a projection of the section at the upper part of the lens falls into the scope of the section of the lower part of the lens. The lens and the light source device can cause intensity of light rays given out by the luminous semiconductor component to be distributed evenly and therefore light fields with even distribution of the light intensity can be obtained on an exit aperture.
Owner:BRIGHT LED ELECTRONICS CORP
Path inquiring system capable of stereoscopically displaying and inquiring method thereof
ActiveCN101697151AShortcutMeet needsInstruments for road network navigationSpecial data processing applicationsComputer terminalData bank
The invention discloses a path inquiring system capable of stereoscopically displaying and an inquiring method thereof. The path inquiring method capable of stereoscopically displaying is applied to the path inquiring of the building interior with a plurality of floors and comprises the following steps: firstly, a path inquiring request signal is received from an inquiring terminal; a path inquiring unit obtains start address information; the path inquiring unit obtains destination address information; according to the start address information and the destination address information, a processor extracts path data according with the start address information and the destination address information from a database, generates a stereogram marking paths corresponding to the path data of the destination address by combining an internal foundation stereogram of the building to , and displays the stereogram on the inquiring terminal, wherein the path passes through different floors of the building interior, and the path passing through different floors of the building interior is marked on the stereogram. The invention further provides a path inquiring system capable of stereoscopically displaying.
Owner:EASYWAY
Circuit board structure
ActiveCN102045936AReduce manufacturing costSimple stepsPrinted circuits structural associationsMultilayer circuit manufactureEngineeringPrinted circuit board
The invention relates to a circuit board structure, which comprises an inner circuit board and a circuit sub board, wherein the inner circuit board is provided with a first circuit layer, a second circuit layer and a core layer positioned between the first circuit layer and the second circuit layer; the circuit sub board is embedded in the core layer, and the wiring density of the circuit sub board is more than that of the inner circuit board. In addition, in another circuit board structure, at least one side of the circuit sub board correspondingly exposes in an opening region. Therefore, the invention is used for making the circuit board with high local wiring density, and can simplify the step and reduce the making cost.
Owner:UNIMICRON TECH CORP
Squelch control method of automatic gain power amplifier chain and circuit
ActiveCN102315826AWidely used valueHas industrial utilization valueGain controlControl signalSoftware engineering
The invention relates to a squelch control circuit, in particular to a squelch control method of an automatic gain power amplifier chain and a circuit. The method comprises the following steps of: (1) sampling an input signal of nth amplifier in the automatic gain power amplifying chain; (2) detecting the input signal into a direct-current voltage signal; (3) carrying out negative feedback amplification on the direct-current voltage signal; (4) comparing the direct-current voltage signal through the negative feedback amplification with a direct-current voltage with preset squelch ratio; and (5) if the direct-current voltage signal is more than or equal to the direct-current voltage with the preset squelch ratio, controlling the power amplifying chain to disconnect; if the direct-current voltage signal is less than the direct-current voltage with the preset squelch ratio, controlling the power amplifying chain to connect. In the invention, a direct-current control signal sent to an electric control attenuator is used as a squelch signal, and a detection circuit does not need to be arranged independently; and since the negative feedback amplification is carried out on the direct-current control signal, a characteristic curve of a detector is justly overturned, so that the problems that a judgment window area of the existing squelch control circuit is too narrow and non-linear are overcome, and the squelch sensitivity is greatly improved.
Owner:BEIJING BBEF SCI & TECH
Method for processing signals between analog exciter and power amplifier and interface circuit
ActiveCN101847983AFix not workingSimple structureContinuous to patterned pulse manipulationTransmissionEngineeringFront edge
The invention relates to a transmitter, in particular relating to a method for processing signals between an analog exciter and a power amplifier used for a long wave / super long wave transmitter and an interface circuit thereof. The method comprises the following steps: dividing sine voltage signals of the analog exciter into 2n numbered constant amplitude square-wave voltage, successively performing differential operation to obtain a series of front edge pulses arranged in order, acquiring pulse delay time of quasi-monspaced square-wave superposition closure time by calculating, delaying the front edge pulses, feeding the front edge pulses and the delayed front end pulses in a drive pulse generator to start up and shut down driving voltages of n numbered step square-wave inverters, and conducting the n numbered square-wave inverters to obtain sinusoid with different amplitudes. The invention solves the problems of pulse loss and incapability of normal work of a system when an inverted rear edge pulse sequence method is used.
Owner:BEIJING BBEF SCI & TECH
Electronic tube plate electrode blocking capacitor
InactiveCN105185587AGood lookingGeneralization of materialsFixed capacitor electrodesFixed capacitor dielectricInterference fitCorona ring
The invention relates to a capacitor and particularly relates to an electronic tube plate electrode blocking capacitor which is used for an electronic tube plate electrode of high-frequency high-power transmission equipment. The electronic tube plate electrode blocking capacitor comprises a polytetrafluoroethylene barrel, inner and outer polar plates arranged on the inner and outer surfaces of the polytetrafluoroethylene barrel, a connection corner and a connection plate which are welded on the polar plate on the outer surface, an annular contact reed which is electrically connected with the electronic tube plate electrode and is arranged on the inner polar plate, and a cooling air pipe arranged under the polytetrafluoroethylene barrel, wherein the inner polar plate is a thin-wall metal inner barrel, and the thin-wall metal inner barrel used as the inner polar plate is combined with the polytetrafluoroethylene barrel through interference fit; the outer polar plate is a thin-wall metal outer barrel; and the thin-wall metal outer barrel used as the outer polar plate is combined with the polytetrafluoroethylene barrel through interference fit, and circular-arc-shaped corona rings are arranged at the two ends of the thin-wall metal outer barrel used as the outer polar plate. With the adoption of the electronic tube plate electrode blocking capacitor, the problem that the connection corner and a connection plate lamp are welded on the polar plates so that the insulation performance of part of the polytetrafluoroethylene barrel is reduced is solved.
Owner:周晓
Pulp bleaching production process technology of zero discharge of biological bleaching and bleaching water
The invention relates to a biological bleaching and paper pulp bleaching production technique with bleaching used water zero discharging. It includes two times biological bleaching and once whitening, and makes the bleaching used water use circularly to realize its zero discharging. The paper pulp material includes straw, ditch reed, bamboo etc. The production technique has the advantages of no pollution, saving water, and low material consumption etc. And its cost is 40% of the chemical process. It is green high and new-technology industries with high economic benefit used to make food wrap paper, medicine wrap paper, and various papers.
Owner:张健
Refrigerator control device
InactiveCN102235801AClear understanding of technical meansLighting and heating apparatusCooling fluid circulationIrradiationRefrigerated temperature
The invention provides a refrigerator operating device. The input operation of temperature increment and reduction of corresponding storage chambers of a refrigerator is realized by left and right slide of a finger of a user, and meanwhile, a euphotic passage is formed in an operating key to indicate a light source for irradiation so as to clearly display the position of the operating key on a panel. Compared with the prior art, the refrigerator operating device has the advantages that time and labor are saved in operation and the convenience for the use of the user is greatly improved.
Owner:TAIZHOU LG ELECTRONICS REFRIGERATOR CO LTD
Pulp production process technology of biolysis (HYH7 black rot) combined with mechanical process
InactiveCN1912234AReduce lossQuality improvementCellulose material pulpingFinely-divided material pretreatmentWater dischargeEconomic benefits
The invention relates to a paper pulp production technique which combines biolysis with machine work and has no used water discharging. It includes smashing the raw material, laying crack, biolysis, high-pressure pressing bursting, mediating, jordaning, pulp screening, and shoving. The used water can be used circularly to realize zero discharging. The paper pulp raw material includes straw, ditch reed, bamboo etc. The production technique has the advantages of no pollution, saving water, and low material consumption etc. And its cost is 40% of the chemical process. It is green high and new-technology industries with high economic benefit used to make food wrap paper, medicine wrap paper, and various papers.
Owner:张健
Drying machine
InactiveCN101113869AReduce performanceAutomatically increase the number of spinsDrying solid materialsDrying machines with non-progressive movementsForeign matterEngineering
The invention relates to a dryer, comprising the components: a drum with a drying cavity, a lint filter used for filtering foreign matters drained out of the drying cavity of the drum and a lint air duct for the air of the lint filter to flow. An air supply fan is arranged and communicated with the lint filter. And the air supply fan, under the drive of a driving motor, ensures the air in the drying cavity to flow through the lint filter. A pressure sensor is arranged to check the pressure difference of the lint filter outside and inside. By receiving the sensor signals sent from the pressure sensor, and under the condition of the pressure difference rising above the standard value, the pollution caused by lint filter blocking can be solved through controlling the driving motor and increasing the controlling part of the rotating number of the air supply fan, ensuring the air in the drying cavity to flow more smoothly, thus improving the performance of the dryer.
Owner:NANJING LG PANDA APPLIANCES
Pulp production technology processed by LYH9 brown rot decomposition combine machine
InactiveCN1912236AReduce lossQuality improvementCellulose material pulpingFinely-divided material pretreatmentWater useMaterial consumption
The invention relates to a paper pulp production technique which combines biolysis with machine work and has no used water discharging. It includes smashing the raw material, laying crack, biolysis, high-pressure pressing bursting, mediating, jordaning, pulp screening, and shoving. The used water can be used circularly to realize zero discharging. The paper pulp raw material includes straw, ditch reed, bamboo etc. The production technique has the advantages of no pollution, saving water, and low material consumption etc. And its cost is 40% of the chemical process. It is green high and new-technology industries with high economic benefit used to make food wrap paper, medicine wrap paper, and various papers.
Owner:张健
Aloe milk powder and making method
The present invention relates to milk product and is especially one kind milk powder containing aloe and its production process. The aloe milk powder is produced with aloe gel, fresh milk, animal protein, vegetable fat powder, malt dextrin and sugar in certain proportion. The production process includes cleaning, sterilizing, peeling, slicing, homogenizing and colloid milling aloe to obtain aloe gel; mixing milk, animal protein, vegetable fat powder, malt dextrin and sugar and concentrating the mixture to produce compounded milk; mixing the compounded milk and aloe gel; homogenizing, sterilizing, spray drying, sieving and packing to obtain aloe milk powder. The aloe milk powder thus produced contains rich amino acids, organic acids, minerals, aloe polysaccharide and other nutrients; has the functions of raising body's immunity, resisting senility, resisting tumor, etc. and is suitable for old people and other valetudinarians to eat.
Owner:BEIJING WEIR MILK IND
Earthing structure for control panel of microwave oven
InactiveCN1576710ADoes not affect appearanceReduce manufacturing costsDomestic stoves or rangesLighting and heating apparatusMicrowave ovenEngineering
The present invention is the earthing structure of control panel in microwave oven. The control panel of microwave oven is installed on the control flange in the upper end of the front panel of microwave oven, and has outer hood and earthing bracket in the inner side. The head part of the earthing bracket is fixed to the installation trough and contacts the inner side of the hood, and the flange of the earthing bracket and the control flange are connected via screws to the connecting casing of the control dial plate for contacting the front side of the control flange. The hidden earthing structure has no influence on the outer appearance of the microwave oven and the earthing bracket is made of relatively cheap material, rather than stainless steel for lowering the cost of microwave oven.
Owner:LG ELECTRONICS (TIANJIN) APPLIANCES CO LTD
Degradable radioactive biliary stent and method for producing the same
The invention relates to a radioactive bile duct support which can be degraded, used to treat cancer, wherein it is formed by the common bile duct support woven from NiTi alloy lines and the degradable belly film made from radioactive material covering the support. And its production comprises (1), using NiTi alloy lines to weave the bile duct support; (2), plating belly layer on the support, emerging it in crosslinker; (3), freezing and drying; (4), before using, using epoxyethane gas to disinfect it. The invention can treat and restrain the membrane increment and cancer growth, without hurting normal organism. And the epoxyethane, dope and chitose of carrier can be degraded.
Owner:六安市济民医药科技有限公司
Remote keying method and device for stepper motor driver based on can communication
ActiveCN102262400AWidely used valueEasy to useTotal factory controlProgramme total factory controlKey pressingArea network
The invention relates to the remote key control of a stepping motor driver, and particularly relates to a remote keying method and a remote keying device of the stepping motor driver based on CAN (Controller Area Network) communication. The device comprises a key, a control end signal processor, a CAN communication network and a controlled end signal processor, wherein the key is connected with the control end signal processor, the control end signal processor processes key signals as 'pressed down' or ' lifted up' code signals and sends the 'pressed down' or ' lifted up' code signals to the CAN communication network, and the controlled end signal processor receives the 'press down' or 'lifted up' code signals sent from the CAN communication network, decodes, synthesizes and restores the 'press down' or 'lifted up' code signals as the key signals, generates control signals and sends the control signals to the stepping motor driver. The remote keying device of the stepping motor driverbased on CAN communication successfully achieves manual remote keying of an antenna of a large-power long-wavelength signal transmitter, realizes a control distance as long as several kilometers, totally satisfies the demand of the manual remote keying of the antenna regulation of the large-power long-wavelength signal transmitter, ensures stable application in a large-power high-frequency field high-interference environment, and has good effect.
Owner:BEIJING BBEF SCI & TECH
Pulp production process technology combined of biolysis (FYR6 soft rot) and mechanical process
InactiveCN1912235AReduce lossQuality improvementCellulose material pulpingFinely-divided material pretreatmentWater dischargeMaterial consumption
The invention relates to a paper pulp production technique which combines biolysis with machine work and has no used water discharging. It includes smashing the raw material, laying crack, biolysis, high-pressure pressing bursting, mediating, jordaning, pulp screening, and shoving. The used water can be used circularly to realize zero discharging. The paper pulp raw material includes straw, ditch reed, bamboo etc. The production technique has the advantages of no pollution, saving water, and low material consumption etc. And its cost is 40% of the chemical process. It is green high and new-technology industries with high economic benefit used to make food wrap paper, medicine wrap paper, and various papers.
Owner:张健
Power sensor frequency characteristic test compensation device and method thereof
ActiveCN102262187AShorten the lead timeLow costFrequency analysisIndividual semiconductor device testingPower sensorCapacitance
The invention relates to a device and a method for testing and compensating, in particular to a device and a method for testing and compensating frequency characteristics of a power sensor. The device comprises a frequency characteristic tester and a power sensor testing and compensating small box. Resistance and capacitance jacks of a debugging and compensating network and diode jacks X5 and X6 are arranged on a panel of the testing and compensating small box. A radio frequency connector is arranged on the small box near the side surfaces of the jacks of the debugging and compensating network. The radio frequency connector is connected with a high-frequency signal output end of the frequency characteristic tester. A direct current output connector is arranged on a side surface near the diode jacks. The direct current output connector is connected with an input end of a frequency characteristic tester. An input end of the debugging and compensating network is connected with the radio frequency connector. An output end of the debugging and compensating network is connected with the diode jack X5. The diode jack X6 is connected with the direct current output connector. According to the device and the method disclosed by the invention, a high-efficiency solution for designing and debugging the power sensor is provided; the debugging problem is reduced; and properties of products are improved.
Owner:BEIJING BBEF SCI & TECH
Integrated air conditioner
InactiveCN1740664AEasy to cleanGood looking frontLighting and heating apparatusAir conditioning systemsEngineeringAir conditioning
The invention relates to a kind of air regulator. More precisely, it is one-piece air regulator which can inbreathe air from the both sides or the top, then discharge air after heat exchanging to the top or side face of the front. It includes frame which is located between two air inlet at the left and right sides, there is more than one discharge opening on the top and side faces; air-supplying fan arranged inside the said frame, which can inbreathe air through the side air inlet and discharge air through the said discharge opening; heat exchanger which can realize air inbreathes by the said air-supplying fan to realize heat exchanging
Owner:LG ELECTRONICS (TIANJIN) APPLIANCES CO LTD
Light emitting device
ActiveCN101826517AAvoid impact damageImprove cooling effectSemiconductor/solid-state device detailsSolid-state devicesHeat conductingMetal sheet
The invention relates to a light emitting device comprising a light emitting module, a first conducting plate and a heat radiating plate set. The light emitting module comprises a conducting circuit consisting of one metal sheet and a plurality of light emitting diodes, the plurality of light emitting diodes are arranged on the conducting circuit and are connected in series and parallel by the conducting circuit, and the light emitting module can be locked between the first conducting plate and the heat radiating plate set and can be externally connected with an outside power source by contacting with a conducting area on the first conducting plate. Because the construction of the light emitting module and the locking combination between the light emitting module and the first conducting plate do not need a process of welding with a circuit board or reflow soldering, the manufacturing process is simpler, and the impaction and the breakage of the light emitting diode, caused by high temperature generated during the welding or reflow soldering process, can be avoided, so that it is beneficial to the batch production; in addition, the bottom of the light emitting diode is in forced, direct and efficient contact with a heat conducting layer on the heat radiating plate set by strong mechanical pressure, the heat conducting layer thins, the head transfer effect is better, and it is beneficial to the radiation of the light emitting diode, thus the normal service life of the light emitting diode can be maintained.
Owner:BRIGHT LED ELECTRONICS CORP
PSM digital circulation controller based on FPGA (Field Programmable Gate Array) and control method thereof
ActiveCN101931385AImprove performance indicatorsImprove Signal Processing AccuracyPulse modulationShift registerPerformance index
The invention relates to a PSM digital circulation controller, in particular to a PSM digital circulation controller based on an FPGA (Field Programmable Gate Array) and a control method thereof. The controller comprises an audio signal processing unit, a control unit and an M bit shift register, wherein the audio signal processing unit, the control unit and the M bit shift register are built from the FPGA, the audio signal processing unit equally divides audio signals according to the time and converts the audio signals into direct current superposed audio signals to be sent to the control unit, the output of the control unit is connected with the M bit shift register, and the control unit controls the M bit shift register according to a time sequence and a direct current superposed audio signal amount to send closing and opening signals of a control switch module of 1 or 0 according to sequences of closing and opening firstly as well as opening and closing firstly. The PSM digital circulation controller is realized by adopting the FPGA through a software, has high signal processing accuracy and is realized by using a software algorithm to replace hardware, thereby enhancing performance indexes of a launcher, miniaturizing a hardware system, enhancing the system reliability and being beneficial to upgrading and networking the system.
Owner:BEIJING BBEF SCI & TECH
Tidal surge generating device
InactiveCN106640496AClear understanding of technical meansMachines/enginesEngine componentsElectricityPower grid
The invention discloses a wave-type tidal surge generating device comprising a buoy, a mechanical transmission mechanism, a hydraulic generating set, a piston, an underlying platform and a storage battery. According to the wave-type tidal surge generating device, the underlying platform is impacted by waves, and a piston rod is driven by the transmission mechanism to move left and right, so that generation is realized by the hydraulic generating set. A plurality of wave-type tidal surge generating devices can be arranged, and the generated electricity is converged into the storage battery and is finally conveyed to an external power grid by the storage battery.
Owner:SHANGHAI OCEAN UNIV
Fat-reducing traditional Chinese medicinal herb preparation drink
InactiveCN102058126AWith fat lossSignificant fat lossFood preparationHerbal preparationsMedicinal herbs
The invention relates to a fat-reducing traditional Chinese medicinal herb preparation drink. The drink is prepared from the following natural medicinal materials which are screened continuously and clinically in an ancient formula of traditional Chinese medical science for a long term in part by weight: 20 to 50 parts of cassia seed, 30 to 60 parts of cannabis fruit, 20 to 50 parts of perilla fruit, 15 to 45 parts of common burreed rhizome, 15 to 45 parts of zedoary, 10 to 40 parts of morning glory seed, 10 to 40 parts of mung bean, 10 to 40 parts of sward, 5 to 35 parts of honey, 10 to 40 parts of xylitol and the balance of purified water. The fat-reducing Chinese medicinal herb preparation drink has the effects of fat reduction, constipation prevention, endocrine conditioning, beautification and the like.
Owner:刘旭
Degradable radioactive sponge and its making process
ActiveCN1985997ATumor suppressionShort irradiation distanceRadioactive preparation carriersAntineoplastic agentsBrain sectionNormal tissue
The present invention relates to degradable radioactive sponge and its making process. The degradable radioactive sponge consists of degradable material collagen, gelatin or chitosan for being implanted into human body and radioisotope I-125, Pd-103, P-32, Sr-90 / Y-90, Re-188 / 186, Au-198, Ir-192 or Cs-137 dispersed in the degradable material. The present invention is suitable for being implanted into human body permanently to treat and suppress tumor one pathological tissue, and the adopted radioisotope has short irradiation distance and no injury to normal tissue. During treating or suppressing cerebral neuroglioma or mammary cancer, the carrier material is degraded inside the tissue and absorbed ultimately by human body.
Owner:沈阳
Resin cementing material for oil-gas well as well as preparation method and application thereof
PendingCN111793481AImprove mechanical propertiesClear understanding of technical meansDrilling compositionFirming agentResin adhesive
The invention particularly relates to a resin cementing material for an oil-gas well and a preparation method and application thereof, and belongs to the technical field of oil-gas well engineering. The resin cementing material is prepared from bisphenol F epoxy resin and a curing agent, wherein the bisphenol F epoxy resin is prepared from at least one of the following components: epoxy resin NPEF-170, epoxy resin NPEF-175, epoxy resin NPEF-185 and epoxy resin NPEF-198; and the curing agent comprises at least one of an amine curing agent and an anhydride curing agent. An amino group or a carboxyl group in the amine curing agent or the anhydride curing agent opens a ring of an epoxy group in the epoxy resin in a high temperature environment in an oil-gas well; a curing agent molecule is taken as a center to form a four-arm star-shaped structure, in the microscopic level, linear epoxy resin molecules are crosslinked to form a three-dimensional network structure, in the macroscopic level,a liquid resin cementing material is solidified into a solid state with certain mechanical strength after a period of time in an underground high-temperature environment, and the cementing and packing effects are achieved.
Owner:BC P INC CHINA NAT PETROLEUM CORP +2
PSM digital circulation controller based on FPGA (Field Programmable Gate Array) and control method thereof
ActiveCN101931385BWidely used valueImprove performance indicatorsPulse modulationShift registerPerformance index
Owner:BEIJING BBEF SCI & TECH
Control panel structure for microwave oven
InactiveCN1576706AAccurate settingClear understanding of technical meansDomestic stoves or rangesLighting and heating apparatusMicrowave ovenPrinted circuit board
The control panel structure for microwave oven includes control dial plate, controller hood, printed circuit board assembly, scale disc knob and guide ring. It has several connecting casings in the inner side of the control panel, control hood in front of the control dial plate, printed circuit board assembly with coder in the front of the control dial plate, outward extending scale disc knob combined to the coder, and guide ring for guiding the scale disc knob. When the printed circuit board assembly is mounted to the back side of the control panel, the relative position between the scale disc knob and the coder may be set correctly.
Owner:LG ELECTRONICS (TIANJIN) APPLIANCES CO LTD
Hydraulic pump control double-motor transmission system
PendingCN114655005AClear understanding of technical meansControl devicesHydraulic motorHydraulic pump
The invention provides a hydraulic pump control double-motor transmission system which comprises a hydraulic pump, an oil supplementing pump, a hydraulic pump speed regulating mechanism, a hydraulic pump electromagnetic valve, a hydraulic motor electromagnetic valve, a hydraulic flow regulating electromagnetic valve, a one-way valve, a throttling valve, a hydraulic motor speed regulating mechanism, a front hydraulic motor, a rear hydraulic motor, a gearbox and a rear axle. The oil supplementing pump is connected with the hydraulic pump, the hydraulic pump is connected with the hydraulic pump speed regulating mechanism, the hydraulic pump speed regulating mechanism is connected with the front hydraulic motor and the rear hydraulic motor, the front hydraulic motor is connected with the gearbox, and the rear hydraulic motor is connected with the rear axle. The transmission mode that the hydraulic pump is connected with the two variable displacement motors in parallel is adopted in the system, the rotating speed range of the double motors is adjusted under the combined action of the hydraulic pump speed adjusting mechanism, the front hydraulic motor speed adjusting mechanism and the rear hydraulic motor speed adjusting mechanism, and the characteristics of being large in stepless speed change range, wide in torque change range and the like are achieved. And the defects of narrow speed change and torque range of a hydraulic system when the existing engineering vehicle works are overcome.
Owner:SHIHEZI UNIVERSITY
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