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419results about How to "Increase loading capacity" patented technology
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Separable cargo hold unmanned transport plane
PendingCN119460107Aquick changereduce structural weightFreight handlingAviationStructural engineering
According to the unmanned transport plane with the separable cargo hold, rapid replacement of different aviation task cabins can be achieved, a plane body longitudinal beam serves as a structure for bearing the overall weight of the plane, a locking structure used for locking the separable cargo hold is arranged at the bottom of the plane body longitudinal beam, and the separable cargo hold is of a universal module structure. The locking structure is opened after the separated cargo hold is supported, the airplane core structure composed of the airplane body longitudinal beams, the front airplane body, the rear airplane body and the airplane wings and the separated cargo hold are respectively replaced with different cargo holds, and the cargo hold structures of the same specification for bearing different tasks are replaced, so that high freight efficiency is achieved; the fuselage longitudinal beams are adopted as main bearing beams, the front fuselage and the rear fuselage only play a role in rectification and do not participate in bearing, the structural weight of the aircraft is reduced to the maximum extent, the loading capacity of the aircraft is greatly improved, meanwhile, standardized, universal and modular accessories are adopted, and all large components have interchangeability, so that the economical efficiency of the aircraft is improved.
Owner:AVIC XAC COMMERCIAL AIRCRAFT CO LTD
Permanent magnet synchronous motor dead zone compensation method based on nonlinear flux observer
ActiveCN119496421AImprove control effectImprove robustnessElectronic commutation motor controlElectric motor controlNatural coordinate systemElectric machine
The invention belongs to the technical field of AC motor transmission control, and relates to a permanent magnet synchronous motor dead zone compensation method based on a nonlinear flux observer. Measuring a motor induction current under a natural coordinate system, and obtaining an alpha-beta axis current through conversion; a non-linear flux observer in an alpha-beta coordinate system is used as a position observation model to obtain an actual rotor position estimation value, a rotating speed ring is formed, and sensorless control of the permanent magnet synchronous motor is achieved; constructing a q-axis voltage disturbance observer by measuring the phase voltage output by the inverter; taking the output of the q-axis disturbance observer as the input of a dead time calculation module to obtain a dead time estimation value; and according to the estimated value, calculating and obtaining a dead-zone compensation voltage, and compensating the output phase voltage of the inverter to realize dead-zone compensation. On the basis of a non-linear flux observer, a position-free control closed-loop structure is constructed, and instruction voltage is corrected, so that the influence of inverter dead time on the permanent magnet synchronous motor is reduced, and the position-free control performance is improved.
Owner:JINCHENG NANJING ELECTROMECHANICAL HYDRAULIC PRESSURE ENG RES CENT AVIATION IND OF CHINA +1
Motor control device and air conditioner
PendingCN119582677AAvoid out-of-step downtimeachieve regulationTorque ripple controlElectric motor controlElectric machineryInverter
The invention discloses a motor control device and an air conditioner, and the motor control device comprises a position / rotation speed estimation unit which estimates a rotor position and a rotor rotation speed of an AC motor driven by an inverter according to a detection current (iq, id) on a control shaft and a voltage command value (Vd *, Vq *) inputted to the inverter; and a current ripple suppression controller for estimating compensation currents (iqcmp, idcmp) for compensating the current command values (iq *, id *) on the control axis from the detection currents (iq, id) on the control axis and the mechanical angle of the rotor, respectively, so as to reduce position observation errors caused by current control fluctuations. The influence of current pulsation on position observation can be suppressed, and the motor position observation accuracy is improved.
Owner:QINGDAO HISENSE BOSCH AIR CONDITIONING SYSTEM CO LTD
Vector propulsion system of low-altitude airship
PendingCN119637061Aeasy to controlImprove the rotation effectRigid airshipsControl systemThree-dimensional space
The invention provides an innovative vector propulsion system of a low-altitude airship, aims to provide accurate attitude adjustment and path planning capabilities for the low-altitude airship in a complex space environment, and consists of a plurality of key components, comprising an executing mechanism, a power driving module, a vector rotating mechanism, a propeller connecting mechanism, a detecting module and a propeller control system. The core characteristic of the airship is that adjusted vector thrust can be applied to any direction in a three-dimensional space so as to respond to real-time attitude adjustment and control requirements, so that accurate vertical rising, lateral flying and rotating operation of the airship in a limited space are realized; due to the unique design, the influence of the thrust direction change on the gravity center of the airship is reduced to the maximum extent, and therefore it is ensured that the low-altitude airship keeps the stable posture, and meanwhile fine control is achieved; the system is further integrated with a set of independent control system so as to guarantee accurate output of thrust angles, meanwhile, the overall structure is light and handy, the system particularly meets the requirements of low-altitude small airships, and the maneuverability and adaptability of the system in a narrow space are enhanced.
Owner:BEIHANG UNIV
A method for preparing conductive ceramic with controllable resistivity
The invention discloses a method for preparing a conductive ceramic with controllable resistivity, and relates to the technical field of conductive ceramics. The invention adopts three different particle sizes of aluminum oxide, titanium nitride, and silicon dioxide to form a ceramic slurry, which reduces the possibility of deformation, and adjusts the amount of titanium nitride added to adjust the ceramic resistivity, thereby realizing the controllable resistivity of the ceramic; the invention adopts methacrylic acid glycidyl ether and starch to form a gel skeleton, and uses amino-treated nanographite sheets as a support to ensure the mechanical strength of the ceramic; the ceramic slurry is used as a core material, and then a layer of gel is wrapped around the outer layer of the core material, and a three-stage high-temperature sintering treatment is performed to optimize the strength of the ceramic, while making the zirconium ions and nickel ions doped with the gel combine with the lanthanum ions in the atomized liquid, and form a zirconium-nickel-lanthanum-carbon crystal structure under a H2O / O2 atmosphere, which greatly improves the conductivity of the gel layer, thereby forming a uniform and continuous conductive path on the surface and inside of the ceramic.
Owner:无锡卓瓷科技有限公司
Preparation method of coated particle dispersion fuel
PendingCN119673511AImprove compactnessincrease loading capacityNuclear energy generationReactors manufactureCarbide siliconMeth-
The invention provides a preparation method of a coated particle dispersion fuel, which comprises the following steps: mixing silicon carbide powder and a binder according to a preset mass ratio, banburying and granulating to obtain a silicon carbide matrix feed; printing a silicon carbide shell green body by using powder extrusion printing equipment and the silicon carbide matrix feed; degreasing the silicon carbide shell green body by using a degreasing solvent to obtain a silicon carbide shell brown blank; a cavity of the silicon carbide shell brown blank is filled with cladding fuel particles, and pores of the cladding fuel particles are filled with silicon carbide powder; and filling the filled silicon carbide shell brown blank into a chemical vapor infiltration device, generating silicon carbide by the introduced methyl trichlorosilane, filling a gap between the silicon carbide powder and the silicon carbide shell green blank with the silicon carbide, and obtaining the coated particle dispersion fuel after the chemical vapor infiltration is completed. By adopting powder extrusion printing and chemical vapor infiltration methods, the problems that the irradiation swelling resistance of existing coated particle dispersion fuel is reduced, the heat conductivity is low, and the loading capacity of coated fuel particles is limited are solved.
Owner:CHINA NORTH NUCLEAR FUEL CO LTD
Application method of fireproof and heat-insulating materials with different fireproof grades on ocean vessel
PendingCN119427853AGuaranteed fire and heat insulationreduce weightHull panellingsFire rescueMaterial typeThermal insulation
The invention discloses an application method of fireproof thermal insulation materials with different fire resistance grades on an ocean vessel, and relates to the technical field of ships. The laying thicknesses of the fireproof heat-insulation materials are different according to the fire resistance grade, the material type and the ship body laying position of the fireproof heat-insulation materials. According to different fireproof grades, material types, ship body laying positions and laying thicknesses of the fireproof heat insulation materials, the fireproof heat insulation materials with different thicknesses can be arranged under different conditions, the weight and cost of the ship can be reduced, and meanwhile the heat insulation and fireproof performance is guaranteed.
Owner:CHINA STATE SHIPBUILDING CORP LTD RESEARCH INSTITUTE 719
Flight-oriented fan wing trailing edge adjusting device
ActiveCN119429086ASimple structureImprove stabilityWing adjustmentsHeat reducing structuresFlight vehicleTrailing edge
The invention discloses a flight-oriented fan wing trailing edge adjusting device, and relates to the technical field of aircrafts, the flight-oriented fan wing trailing edge adjusting device comprises a trailing edge angle adjusting mechanism, a rectification angle adjusting mechanism, a circular end plate and a rectification plate, the trailing edge angle adjusting mechanism comprises a steering engine, a first connecting rod mechanism, a trailing edge plate and a rotating shaft; the steering engine is fixedly installed on the circular end plate and controls the rear edge plate to move through the first connecting rod mechanism, the rotating shaft is arranged on one side of the rear edge plate, and the rear edge plate is hinged to the rectifying plate through the rotating shaft. By freely adjusting the trailing edge angle and the rectification angle, the aerodynamic force of the fan-wing aircraft is changed, the lift force and thrust distribution is improved, the aerodynamic effect is enhanced, the energy consumption is reduced, and the flight efficiency is improved. The fan wing trailing edge adjusting device is applied to a serial fan wing, forward coupling gain between two wings is achieved by changing the size of a trailing edge angle and a rectification angle, different flight conditions are met, various flight requirements are flexibly met, and the load performance and the endurance are optimized.
Owner:ANHUI UNIVERSITY OF TECHNOLOGY
Fire-fighting power two-bus power supply and communication method and device based on PWM
ActiveCN119484173Alow data ratefast data transferData switching current supplyBus networksWaveform codingInterference resistance
The invention provides a PWM-based fire-fighting power two-bus power supply and communication method and device, and relates to the technical field of fire-fighting monitoring, and the method comprises the steps: taking a PWM voltage signal sent by a master station to a slave station as a downlink signal, taking a PWM current signal sent by the slave station to the master station as an uplink signal, representing the signal logic based on the combination of PWM frequency and PWM duty ratio, and carrying out the communication of the PWM frequency and the PWM duty ratio; the time length of a timer is defined as a unit pulse width count value according to the minimum pulse width of PWM, a comparison table containing a hexadecimal number, a binary number, a PWM frequency, a PWM duty ratio, a PWM low-level pulse width count value, a PWM high-level pulse width count value and a PWM period value is made, and coding and code sending are carried out based on the comparison table by using a single-byte table look-up method. And decoding and receiving codes based on the comparison table by using a single-byte offset compression look-up table method. Bidirectional PWM communication and PWM waveform coding are adopted, the overall loading capacity of the bus is improved, the bus distance is increased, the error problem can be solved through a verification mechanism based on digital communication of PWM coding, and the communication anti-interference capacity is improved.
Owner:YINGKOU NEW SHANYING ALARM EQUIP
Functional integrated seat
PendingCN119547988AImprove smoothnessreduce weightDismountable chairsFoldable chairsClassical mechanicsStructural engineering
The invention relates to a functional integrated seat, which comprises a seat, a backrest, armrests arranged on two sides of the seat and back lugs arranged on two sides of the backrest, a seat frame, a backrest frame, armrest frames and back lug frames are respectively arranged on the inner sides of the seat, the backrest, the armrest frames and the back lugs, the backrest frame and the armrest frames are detachably arranged on two sides of the seat frame, and the back lug frames are detachably arranged on two sides of the backrest frame. The whole seat is detachable, the backrest frame and the armrest frames are detachably arranged on the two sides of the seat frame, the back lug frames are detachably arranged on the two sides of the backrest frame, disassembly and assembly are very convenient, the packaging utilization rate can be maximized, and the transportation cost is reduced. Meanwhile, all the parts are formed by integrally welding iron pipes, wood materials are removed, the environment is protected, the structural firmness is improved, formaldehyde is removed, the containing space in the seat frame is large, a backrest, armrests and other parts can be placed in the seat frame, the packaging size is further reduced, the transportation cost is reduced, the loading quantity is increased, and the space utilization rate is increased.
Owner:ANJI XINZHAN INTELLIGENT TECHNOLOGY CO LTD
Tension adjusting device of kart transmission chain and control method
InactiveCN119572686ASolution to short lifeImprove stabilityGearingGearing detailsClassical mechanicsSprocket
The invention discloses a tension adjusting device of a kart transmission chain and a control method. The tensioning device comprises a first chain wheel (1) and a second chain wheel (2), a chain (3) is meshed on the first chain wheel (1) and the second chain wheel (2), a frame body (4) is arranged on the lower side of the chain (3), a third chain wheel (6) is rotationally arranged on the frame body (4), and the third chain wheel (6) is meshed with the lower side of the chain (3); a frame body (401) is arranged on the side portion of the frame body (4), and the chain (3) is arranged in the frame body (401) in a penetrating mode. A laser displacement sensor (402) and a photoelectric sensor (403) are arranged on the inner side of the frame body (401); and the lower part of the frame body (4) is connected with a lifting adjusting mechanism (5). The tensioning force can be adjusted according to the real-time running condition of the chain, the chain tensioning force can meet the power output requirement, and meanwhile the phenomena that the chain skips and the service life is shortened due to the fact that the chain tensioning force is too large are avoided.
Owner:CIXI HANGZHOU BAY SECONDARY VOCATIONAL SCHOOL (CIXI TECH SCHOOL)
Telescopic control device and clothes airing machine thereof
ActiveCN222477047Uachieve adaptiveincrease loading capacityOther drying apparatusTextiles and paperControl engineeringMachine
A telescopic control device of an airing rod assembly is characterized by comprising a main airing rod, a movable airing rod, a controller, a clothes detection unit, a driving device and a limiting device connected with the controller; the movable airing rod is telescopically mounted on the main airing rod; the movable airing rod is connected with the driving device and is driven by the driving device to do telescopic movement relative to the main airing rod; the clothes detection unit is arranged on the movable airing rod, is connected with the controller and is used for detecting information of clothes on the movable airing rod; the controller is connected with the driving device and is used for sending a driving instruction to the driving device according to the information of the clothes on the movable airing rod; the limiting device detects whether the movable airing rod is completely stretched or retracted or not and feeds back the result to the controller.
Owner:GUANGDONG HOTATA TECH GRP
Large-span coal shed and coal unloading ditch coal shed steel connecting structure and mounting method thereof
PendingCN119411697AImprove interoperabilityeasy to transportStrutsBuilding material handlingCoal briquetteArchitectural engineering
The invention discloses a large-span coal shed and coal unloading ditch coal shed steel connection structure and an installation method thereof, and relates to the technical field of power plant coal yard dry coal shed renovation, the large-span coal shed and coal unloading ditch coal shed steel connection structure comprises a main coal shed including a first-stage coal shed and a second-stage coal shed, and shed surfaces of the first-stage coal shed and the second-stage coal shed are in symmetrical arc shapes; the end parts of the first-stage coal shed and the second-stage coal shed are connected with each other, and the shed surfaces coincide; the side coal shed is installed on one side of the second-stage coal shed and comprises a side shed roof, a first supporting column and a second supporting column, and the first supporting column and the second supporting column are connected to the two sides of the side shed roof; and one side of the side shed roof is obliquely fixed on the outer shed surface of the second-stage coal shed. The problem that coal-containing sewage is easily generated if coal briquettes are scattered in the coal conveying process in rainy days due to the fact that gaps exist between existing coal sheds is solved, and the coal shed has high loading capacity and can resist natural disasters such as snow storm, strong wind or earthquakes.
Owner:HUANENG PINGLIANG POWER GENERATION CO LTD
Chuck for laser cutting production line
ActiveCN119457516Aheavy loadImprove efficiencyMetal working apparatusLaser beam welding apparatusProduction lineGear wheel
The invention provides a chuck for a laser cutting production line. The chuck comprises a rack, a rear cover, a front cover, two up-down clamping jaws, two left-right clamping jaws, a power source for providing power for movement of the clamping jaws, a synchronous driving mechanism arranged on the front cover and used for driving the clamping jaws to synchronously move under the action of the power source, and a rotary driving mechanism used for driving the whole chuck to rotate. The synchronous driving mechanism comprises a power input shaft in transmission connection with the power output end of the power source, a power transmission main gear rotationally arranged on the power input shaft, a first gear ring and a second gear ring, wherein the first gear ring and the second gear ring are rotationally arranged on the inner side and the outer side of the first gear ring respectively and meshed with the power transmission main gear. The two first transmission gears are meshed with the first gear ring, the two second transmission gears are meshed with the second gear ring, and the four transmission assemblies are used for achieving transmission connection between the two first transmission gears and the two second transmission gears and the two clamping jaws in the vertical direction and the left-right direction correspondingly. Compared with an existing similar chuck, the clamping speed is higher, the efficiency is higher, the thrust is larger, and the cost performance is high.
Owner:CHANGZHOU BIYOUTE MASCH TECH CO LTD
Unmanned aerial vehicle pod mounting structure
ActiveCN222539014Uincrease loading capacityReduce space consumptionFreight handlingAircraft assemblyMarine engineeringUncrewed vehicle
Owner:SICHUAN PANMEI ZHIFEI TECHNOLOGY GROUP CO LTD
Reactor cabin structure internal pressure-bending combined load test device and test method thereof
ActiveCN119534148Areduce usageevenly loadedNuclear energy generationMaterial strength using tensile/compressive forcesStructural engineeringMechanical engineering
The invention discloses a reactor cabin structure internal pressure-bending combined load test device and a test method thereof.The device comprises a test module, the test module comprises a test section, a first transition section and a second transition section, and the test section is provided with a first pressure cabin and a second pressure cabin; the internal pressure loading module comprises a water tank and a pressure pump; the bending loading module comprises a first vertical loading mechanism and a second vertical loading mechanism; the bottom supporting module comprises a first supporting mechanism and a second supporting mechanism; and the measuring module comprises a first pressure sensor, a second pressure sensor and a pressure gauge. According to the invention, the internal pressure loading module and the bending loading module are used for simulating the load of the pressure chamber structure under dual accident conditions, the structural response under the condition of superposition of different internal pressure loads and different bending loads is known, and the safety and reliability of a chamber section model of the pressure chamber structure under the accident conditions are analyzed.
Owner:CNNC MARINE NUCLEAR POWER DEV CO LTD
Unmanned aerial vehicle garbage cleaning device
InactiveCN119408758AImprove stabilityGuaranteed stabilityAircraft componentsWater cleaningBrushless motorsElectric machinery
The invention discloses an unmanned aerial vehicle garbage cleaning device, and relates to the technical field of riverway inspection unmanned aerial vehicles, the unmanned aerial vehicle garbage cleaning device comprises an unmanned aerial vehicle bracket, the upper end of the unmanned aerial vehicle bracket is fixedly connected with an equipment platform, the center of the upper end of the equipment platform is fixedly connected with a flight control terminal, and the upper end of the unmanned aerial vehicle bracket is fixedly connected with an electric rotor; the four electric rotors are all electrically connected with the flight control terminal, the unmanned aerial vehicle support greatly improves the stability of the unmanned aerial vehicle body through a parallel four-rod structure, common fog, wind and other common sudden influences can be dealt with, the electric rotors and the guide rail driving motors all use brushless motors as power sources, the unmanned aerial vehicle is higher in loading capacity, and the unmanned aerial vehicle is more convenient to use. The brushless motor is high in power, the double-grabbing structure is high in grabbing capacity, large-load grabbing can be achieved, the double-grabbing structure can conduct half-meter-height grabbing, a lead screw in the electric lead screw guide rail and threaded self-locking of a sliding block are used for preventing a grabbed heavy object from slipping off, and the stability during grabbing and lifting is guaranteed.
Owner:康世彤
Underwater vehicle charging system and charging method
ActiveCN119502736Aincrease loading capacityextended working hoursCharging stationsUnderwater vesselsElectrical batteryPermanent magnet synchronous motor
The invention provides an underwater vehicle charging system and a charging method, and solves the problem that the loading capacity, the operation time and the operation flexibility of an underwater vehicle are affected as a heavy coupler needs to be carried at the vehicle end in the conventional underwater vehicle wireless charging system. According to the invention, the permanent magnet synchronous motor which must be carried by the underwater vehicle is used for energy supply, the battery of the underwater vehicle is directly charged through the electromotive force generated by the reverse rotation of the permanent magnet synchronous motor, and the situation that the load is increased by a coupler installed at the vehicle end in the conventional wireless charging process is avoided. The charging system comprises a charging device arranged underwater and a one-way clutch arranged between a transmission shaft of a permanent magnet synchronous motor of the underwater vehicle and a propeller. The charging device comprises a base platform, a mobile platform, a motor, a charging rod, a fixed electromagnet, a communication unit and a control unit. The motor converts electric energy obtained by the charging device into mechanical energy which is transmitted to the permanent magnet synchronous motor transmission shaft through the charging rod to drive the transmission shaft to rotate reversely.
Owner:NORTHWESTERN POLYTECHNICAL UNIV
Micro-tube type insect pheromone insect trapping core structure
InactiveCN119423043Aincrease loading capacityavoid wastingGeneral water supply conservationInsect catchers and killersZoologyBattery cell
The invention relates to the technical field of pheromone insect luring cores, and discloses a micro-tube type insect pheromone insect luring core structure which solves the problem that an existing insect pheromone insect luring core is poor in use effect and comprises an insect luring core body and a trap matched with the insect luring core body. The insect luring core body is composed of a pheromone storage tank and a plurality of pheromone emission units, the pheromone storage tank is connected to the middle of the top end of the trap, each pheromone emission unit is composed of a miniature pipe sleeve, an emission core and a plurality of liquid absorption strips, a plurality of emission micropores are formed in the side edge of the miniature pipe sleeve, the miniature pipe sleeve is filled with the emission core, and the liquid absorption strips are arranged in the miniature pipe sleeve. The liquid absorption strip is connected to the top end of the emission core, and the trap is composed of a shell, two suspension arms, a box body, a battery, a controller, a conical cover, a high-voltage shock net, an air inlet assembly, a self-adaptive exhaust assembly, a plurality of collecting pipes and a plurality of collecting bags. Through cooperative use of the insect trapping core and a trap, the loading capacity of pheromones can be improved, and volatilization of the pheromones can be controlled.
Owner:SHANGHAI HEYI TECH CO LTD
A black start method for offshore wind farm based on diesel-storage combined system
ActiveCN114784859Bincrease loading capacityImprove stabilitySingle network parallel feeding arrangementsPower oscillations reduction/prevention
The present invention discloses a black start method for an offshore wind farm based on a diesel-storage combined system, comprising: step S1, the energy storage device adopts a zero-voltage start control strategy to reduce the excitation inrush current; step S2, starting the diesel generator set, and using the auxiliary load to assist the diesel generator set in starting; step S3, putting in a balanced load and supplying power to the auxiliary machine of the wind turbine set; step S4, the wind turbine sets are started one by one and capture wind energy for power generation; step S5, after the start of the units suitable for transmitting active power is completed, the wind turbine sets operating in the phase adjustment mode are put in; step S6, the adjustable load is reduced according to the rated power of the motor load to be put in, and the motor load is put in after the system enters a steady state to realize the black start. The present invention adopts a reasonable wind farm black start operation method and control strategy. The wind turbine phase adjustment operation mode allows the grid-side converter of the non-starting unit to participate in reactive power support, improves the system voltage stability during the black start process, and is conducive to the smooth black start.
Owner:中广核如东海上风力发电有限公司 +2
Isolation power supply circuit driven by transistor based on mirror voltage source and control method
ActiveCN119628384Aincrease loading capacityImprove reliabilityEfficient power electronics conversionDc-dc conversionHemt circuitsPulse wave
The invention provides an isolated power supply circuit driven by a transistor based on a mirror voltage source, which outputs two paths of reverse periodic pulse waves through a wave sending module, generates a target driving voltage through a push-pull transformation module according to the periodic pulse waves, and outputs an isolated driving voltage through an isolation module according to the target driving voltage. The power supply output voltage is output through the voltage stabilizing module according to the isolation driving voltage, so that the power supply has relatively high loading capacity; in addition, the invention provides an isolation power supply control method driven by a transistor based on a mirror image voltage source, according to output voltages of two mirror image voltage stabilizing circuits of a voltage stabilizing module, a control quantity is obtained according to a set adjusting quantity calculation rule and is used for adjusting a first resistor of a wave sending module, so that the output voltages of the two mirror image voltage stabilizing circuits are balanced; and the frequency of the output voltage is stabilized by automatically adjusting a second resistor and a third resistor of the wave generating module, so that the reliability of the output voltage of the power supply is improved.
Owner:SHENZHEN EN-JOY TECH CO LTD
Tilting type electric vertical take-off and landing aircraft with foldable airfoils and operation method of tilting type electric vertical take-off and landing aircraft
PendingCN119551190Asave parking spacereduce demandAircraft stabilisationWing adjustmentsFlight vehicleStructural engineering
The invention discloses a tilting type electric vertical take-off and landing aircraft with foldable airfoils and an operation method. Comprising a fuselage, a fixed section wing arranged on the fuselage, a folding section wing connected to the fixed section wing through a wing folding assembly, a vertical fin arranged at the tail of the fuselage, a fixed section horizontal tail arranged on the vertical fin and a folding section horizontal tail connected to the fixed section horizontal tail through a horizontal tail folding assembly. The conversion of the aircraft among a folding mode, a helicopter mode and a fixed-wing aircraft mode can be realized under the action of the wing folding assembly and the horizontal tail folding assembly, a front-end rotor wing is arranged on the fixed-section wing, a middle-end rotor wing is arranged on the folding-section wing, and a rear-end rotor wing is arranged on the folding-section horizontal tail. When the aircraft is parked on the ground, the folding section wings and the folding section horizontal tail can be folded, so that the parking space needed by the aircraft is reduced, the requirement for special infrastructures is lowered, the cost is saved, the aircraft can be more easily integrated into the current limited space of a city, and the operation flexibility is enhanced.
Owner:AERONAUTICS RES INST OF CHINA
Partition power grid toughness planning method based on important load differentiation guarantee supply principle
PendingCN119398411AGuarantee basic operationincrease loading capacityData processing applicationsInformation technology support systemControl engineeringPower grid
The invention provides a partition power grid toughness planning method based on an important load differentiation guarantee supply principle. The method comprises the steps of setting an important load differential supply guarantee principle and a multi-level power supply guarantee principle in a partitioned power grid, analyzing an existing component upgrading demand in the partitioned power grid, determining a newly added component position, and constructing a planning model based on the important load differential supply guarantee principle, the multi-level power supply guarantee principle and the newly added component position, and solving the planning model to obtain a toughness planning strategy. According to the embodiment of the invention, the urban power grid toughness planning method is put forward from the perspective of improving the important load capability of the urban power grid under extreme events by ensuring basic operation of the city and reducing social influence as far as possible.
Owner:BEIJING JIAOTONG UNIV +1
Suspension mechanism of heavy-load Mecanum wheel and automatic guide carrier
ActiveCN222610858Uavoid deformationreduce frictionElectric propulsion mountingOther load carrying vehiclesControl engineeringReducer
The utility model provides a suspension mechanism of a heavy-load Mecanum wheel and an automatic guide carrier, and belongs to the technical field of mobile platforms, the suspension mechanism comprises a first connecting plate, the Mecanum wheel, a second connecting plate, a driving piece and an elastic piece, the first connecting plate is provided with a speed reducer, the driving piece is connected with the input end of the speed reducer, and the second connecting plate is provided with a second connecting plate; the Mecanum wheel is installed at the output end of the speed reducer through a rotating shaft, the driving part drives the Mecanum wheel to rotate through the speed reducer, the second connecting plate is slidably installed on the first connecting plate through a guide rail sliding block structure, the top face of the second connecting plate is connected with the vehicle body, and the elastic part is arranged between the first connecting plate and the second connecting plate; the driving piece drives the Mecanum wheel to rotate through the speed reducer, the first connecting plate and the second connecting plate are matched through a guide rail sliding block structure, the effects of guiding and bearing external torque are achieved, the torque is borne by the two connecting plates, the strength of the connecting plates is easier to guarantee, and deformation is not prone to occurring.
Owner:CHINA CONSTR STEEL STRUCTURE ENG CO LTD
Fault-tolerant topology for open-circuit fault of series winding motor inverter and control method of fault-tolerant topology
PendingCN119561438AEasy to implementstable controlElectronic commutation motor controlAC motor controlFault toleranceVoltage vector
The invention belongs to but is not limited to the technical field of alternating current motor and driving control, and discloses a series winding motor inverter open-circuit fault-tolerant topology and a control method thereof, when an inverter bridge arm has an open-circuit fault or the whole bridge arm is cut off due to a short-circuit fault, a corresponding bipolar diode is switched on, so that the fault tolerance of the inverter is realized. The fault-tolerant topology circuit reconstruction of the series winding motor is realized; and then reconstructing a corresponding voltage vector set, and switching a control algorithm of the series winding motor to realize fault-tolerant driving of the series winding motor without default phase. According to the invention, the residual healthy devices and the bus capacitor of the inverter are fully utilized, the open-phase-free operation of the inverter fault can be realized on the premise of not increasing the system cost and the volume, and the loading capacity of the inverter after the fault is improved. The fault-tolerant topology can also cope with fault-tolerant operation in different fault scenes, the fault-tolerant output performance of the series winding motor can be effectively improved, and stable control after fault-tolerant control is achieved through the fault-tolerant SVPWM and CBPWM modulation algorithms.
Owner:TONGJI UNIV
System for heating primary air and secondary air through large slag waste heat of coal-fired power plant boiler
ActiveCN222392920UReduce steam extractionincrease loading capacityBlast-producing apparatusIndirect carbon-dioxide mitigationBoiler furnacePower station
The utility model provides a system for heating primary air and secondary air by large slag waste heat of a coal-fired power plant boiler, which comprises a tubular heat exchanger which is arranged at a dry bottom hopper below a boiler hearth in the left-right direction of the bottom of the dry bottom hopper. A cooling water outlet of the tubular heat exchanger is divided into two paths, one path is connected with a primary air heater arranged at an inlet of the primary fan, and the other path is connected with a secondary air heater arranged at a secondary air inlet; heat carried by large slag discharged by a boiler is used for heating inlet air temperature of the primary fan and the secondary fan, steam extraction of a steam turbine is reduced, more steam enters the steam turbine to do work, and the load capacity of a unit is effectively improved.
Owner:陕西君创智盈能源科技有限公司
Preparation method and application of closed-loop feedback-regulation nano drug delivery system
InactiveCN119607225Aincrease loading capacityImprove delivery efficiencyOrganic active ingredientsPharmaceutical delivery mechanismPharmaceutical SubstancesBiology
The invention belongs to the technical field of drug carriers, and particularly discloses a preparation method and application of a closed-loop feedback-regulation nano drug delivery system.The preparation method comprises the following steps that a starting material containing a reversible molecular library is provided, and the reversible molecular library is prepared in a buffer salt system; under thermodynamic control, adding anti-cancer drug molecules and guest molecules into the starting material; through a reversible covalent reaction process, molecules in an initial material spontaneously form a self-assembled nano-carrier containing drug molecules under the combined action of the drug molecules and guest molecules. According to the preparation method and application of the closed-loop feedback-regulation nano drug delivery system, reversible covalent reaction, closed-loop feedback-regulation and self-assembly technologies are combined, spontaneous construction of a nano carrier is achieved, and the nano carrier is endowed with excellent drug loading capacity, stability and environmental responsiveness.
Owner:ANHUI UNIVERSITY OF TRADITIONAL CHINESE MEDICINE
Environment-friendly degradable gear lubricant as well as preparation method and application thereof
InactiveCN119391472Aincrease polarityImprove adsorption capacityFatty acid hydrogenationFatty acid esterificationPolymer scienceVegetable oil
The invention relates to an environment-friendly degradable gear lubricant as well as a preparation method and application thereof, in particular to an environment-friendly degradable gear lubricant which is prepared from the following components in percentage by weight: 50-60% of base oil, 15-25% of an additive, 23-38% of modified castor oil, 5-10% of an antioxidant and 5-8% of a tackifier, the base oil is prepared from pentaerythritol ester, butylene adipate, butylene terephthalate and a catalyst, and the mass ratio of the pentaerythritol ester to the butylene adipate to the butylene terephthalate is (1.2 to 2.5) to (3.1 to 4.5) to (2 to 3). The vegetable oil biological lubricant can ensure environmental friendliness and degradability while realizing lubrication, and has all characteristics required by lubricating oil, including high viscosity index, low volatility and good lubricity.
Owner:GUANGZHOU CAMAROL LUBRICANTS CO LTD
Overhead floor and combined floor
ActiveCN222500908UIncrease the support pointincrease loading capacityFalse floorsSupport pointRaised floor
The utility model discloses a raised floor and a combined floor, comprising a floor body, the floor body is provided with a plurality of first support assemblies and at least one second support assembly; the multiple first supporting assemblies are distributed in the circumferential direction of the floor body. The second supporting assembly is arranged in the middle of the floor body. The first supporting assembly and the second supporting assembly are located on the same side of the floor body. According to the utility model, supporting points to the floor are increased, so that the loading capacity of the floor is effectively improved.
Owner:CHINA MOBILE GROUP DESIGN INST +1
Multifunctional trolley
ActiveCN222540341UGuaranteed stabilityensure safetyBuilding material handlingLoad-engaging elementsSUSPENDING VEHICLEElectrical control
The utility model relates to a trolley, belongs to the technical field of construction assistance, and particularly relates to a multifunctional trolley which comprises a walking chassis, a walking trolley body support is fixedly connected to the upper surface of the walking chassis, a pulley support is fixedly connected to the top end of the walking trolley body support, a crane beam is arranged on the pulley support, and an electric hoist is arranged on the crane beam. An electric control box is arranged on the walking vehicle body bracket; the heavy formwork can be rapidly and safely moved from one position to another position, the formwork installation process is greatly simplified, manpower and time are saved, labor and time needed by traditional manual operation are avoided, the material transportation efficiency is improved, and the problem that when a bridge concrete anti-collision wall is constructed, the construction efficiency is greatly improved is solved. The problems that in the prior art, workers need to be matched with a crane for formwork installation, the number of reinforcing accessories is large, the installation time is long, construction period and cost control is not facilitated, and therefore the construction efficiency of the concrete anti-collision wall is low are solved.
Owner:CHINA CONSTR EIGHT ENG DIV CORP LTD