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40results about How to "Achieve buck" patented technology
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Refrigeration anti-freezing protection control method and device for air conditioner and air conditioner
ActiveCN110793159AAchieve buckImprove the accuracy of judgmentMechanical apparatusSpace heating and ventilation safety systemsEngineeringPressure reduction
The invention provides a refrigeration anti-freezing protection control method and device for an air conditioner and the air conditioner. The control method comprises the following steps that after the air conditioner is started and is subjected to refrigeration operation, the temperature of an inner disk is acquired; whether the condition of entering an anti-freezing protection mode is met or notis judged according to the temperature of the inner disc; and if the condition of entering the anti-freezing protection mode is met, the air conditioner enters the anti-freezing protection mode, andthe operation state of an inner fan, a bypass control valve and a compressor is controlled according to the temperature of the inner disk, the exhaust temperature of the compressor of the air conditioner and a current wind gear of the inner fan of the air conditioner after the air conditioner enters the anti-freezing protection mode so as to prevent an indoor heat exchanger from freezing, whereinthe bypass control valve is arranged between the indoor heat exchanger and an outdoor heat exchanger. According to the refrigeration anti-freezing protection control method for the air conditioner, the evaporation temperature is improved through the adjustment of the air conditioner so as to achieve the defrosting purpose of an inner machine, frequent restart of the compressor is avoided, the pressure reduction and defrosting effects of the air conditioner are achieved.
Owner:NINGBO AUX ELECTRIC
Refrigerant compressor oil circulation rate measuring and testing device based on intermiscibility
ActiveCN103939324AGuaranteed efficient separationImprove work efficiencyPump testingPositive-displacement liquid enginesOil separationEngineering
The invention belongs to the technical field of refrigeration, and particularly relates to a refrigerant compressor oil circulation rate measuring and testing device based on intermiscibility. The device comprises an oil separation assembly which is provided with an oil outlet end and a refrigerant outlet end, the refrigerant outlet end is at least communicated with a compressor air suction port end at least through a condenser, a liquid storage device and an evaporator to form a refrigerant loop, the oil outlet end is communicated with a compressor air suction oil return port to form an oil circulation loop, and flow meters are arranged on the oil circulation loop and the refrigerant loop. The device further comprises a refrigeration assembly, and liquid supply temperature of the refrigeration assembly is lower than the highest two-phase separation temperature of a refrigerant and refrigerator oil. The device improves work efficiency of a whole oil circulation system, meanwhile, values measured by the flow meters on the loops are more accurate, and finally precision of oil circulation flow rate measurement data of a refrigerant compressor is guaranteed.
Owner:HEFEI GENERAL MACHINERY RES INST +1
Bidirectional energy storage converter
InactiveCN108879748AQuick charge and dischargeStable voltageSingle network parallel feeding arrangementsAc network load balancingLow voltageLoad following power plant
The invention discloses a bidirectional energy storage converter, and relates to the technical field of power transmission and transformation. The bidirectional energy storage converter comprises a plurality of DC boost-buck units, a three-phase inversion bridge circuit, a controller, an adaptor, an AC filtering circuit, an isolation transformer and an AC EMI filter, wherein the AC EMI filter is connected with an AC bus, the AC bus is connected with a power grid by an AC circuit breaker, a high-voltage end of the isolation transformer is connected with the AC EMI filter, a low-voltage end of the isolation transformer is connected with an AC output end of the three-phase bridge inverter and an AC input end of the adaptor, a DC input end of the three-phase bridge inverter is connected with the DC boost-buck units, and a sampling signal input end of the controller is connected with a DC input end / AC output end of the three-phase bridge inverter and a DC output end / AC input end of the adaptor. By the bidirectional energy storage converter, bidirectional energy flowing of the AC system and the DC system can be achieved, multi-path DC inputs of multiple paths of different types of DC power supplies also can be achieved, peak clipping and valley filling of a power grid load can be achieved, and the bidirectional energy storage converter also has the functions of emergency power supply, reactive power compensation, electric energy quality control and the like.
Owner:QINGDAO TELD NEW ENERGY TECH CO LTD
Power module for ac/ac power conversion
An arrangement is provided a converter, an inverter, a smoothing condenser connected between the converter and the inverter, and reactors each connected between the connection point of each pair of IGBT switches of the converter and the output terminal of each phase of the AC power source. The converter has three pairs of IGBT switches for three phases that are serially connected to one another and connected in parallel to one another. First diodes are each connected in reversed polarity and in parallel to each IGBT switch. The inverter has three pairs of IGBT switches that are serially connected to one another and connected in parallel to one another. Each diode is connected in reversed polarity and in parallel to each IGBT switch.
Owner:DAIKIN IND LTD
Safe combustible ice mining method in seabed shallow layer
ActiveCN108625827AAchieve buckSafe and stable operationConstructionsFluid removalOcean bottomWater vapor
The invention provides a safe combustible ice mining system and method in a seabed shallow layer. The safe combustible ice mining method comprises the following steps that a pre-development section isdetermined; the development program of combustible ice is developed; a row of 5-6 horizontal well sets are distributed; drilling is performed in the positions of the horizontal well sets; slotting treatment is performed around a shaft after drilling; pulling out of hole of a drill is performed; the completion fluid in the shaft is replaced; vapour with temperature being 120DEG C-180DEG C and pressure being 20MPa-30MPa is injected into separated wells in the 5-6 horizontal well sets; the water mist in the ejected gas is observed; ignition is performed; and the wellhead gas is incorporated intoa gas outlet pipeline. According to the features such as seabed topography and geomorphology, engineering geological characteristics, and a combustible ice reservoir in the hydrate area, the environmental problems and disasters caused by methane leakage are avoided from engineering through reasonable well location layout and pressure lowering schemes.
Owner:杨浩祥
Low-voltage intelligent voltage-regulating and voltage-stabilizing system
ActiveCN105322549AAchieve buckProtection lifeAc network voltage adjustmentSustainable buildingsLow voltageEngineering
The invention discloses a low-voltage intelligent voltage-regulating and voltage-stabilizing system. The low-voltage intelligent voltage-regulating and voltage-stabilizing system comprises a single-phase intelligent voltage regulator. The low-voltage intelligent voltage-regulating and voltage-stabilizing system is characterized in that the single-phase intelligent voltage regulator comprises an intelligent control switching unit, a power capacitor and a single-tap isolation transformer, the intelligent control switching unit comprises a main control MCU, a single phase alternating current voltage and current acquisition module, a switch action unit and a wireless communication module; the single phase alternating current voltage and current acquisition module, the wireless communication module, a power module and the switch action unit are respectively connected with the main control MCU; the switch action unit is formed by assembling one single-pole double-throw interlocking alternating current contactor, one single-pole single-throw common type alternating current contactor, relays and spare relays, and each relay is connected with one spare relay in series and then is connected with one single-pole double-throw interlocking alternating current contactor and one single-pole single-throw common type alternating current contactor in parallel; and the wireless communication module comprises a GPRS wireless communication module and a WIFI wireless communication module. The low-voltage intelligent voltage-regulating and voltage-stabilizing system can realize automatic holding of stable output voltage of a user side.
Owner:福州万力电气科技有限公司
Four-switch MPPT controller
ActiveCN109672403AAchieve boostAchieve buckDc-dc conversionPhotovoltaicsElectrical batteryEngineering
The invention provides a four-switch MPPT (Maximum Power Point Tracking) controller. The four-switch MPPT controller comprises a photovoltaic power supply, a photovoltaic anti-reverse protection unit,a four-switch Buck-Boost conversion unit, a battery reverse connection protection unit and a load control protection unit connected in order; the battery reverse connection protection unit is connected with a storage battery, and the load control protection unit is connected with the battery reverse connection protection unit and the load; the photovoltaic anti-reverse protection unit is used toavoid damaging of the solar controller caused by reverse connection of the photovoltaic power supply; the four-switch Buck-Boost conversion unit is configured to achieve buck and boost of the controller; the battery reverse connection protection unit is used to avoid damaging of the solar controller caused by reverse connection of the storage battery; and the load control protection unit is configured to avoid damaging of the solar controller caused by too large load, reverse connection and short circuit. The four-switch MPPT controller has a buck-boost function, is low in power device voltagestress and few in reactive elements, has the input and output like polarity and common ground, and is suitable for occasions in a wide input voltage range.
Owner:RENOGY NEW ENERGY CO LTD
Desorption flow fault detecting device and method for vehicle evaporative emission system and vehicle
ActiveCN110361198AAchieve buckIncrease the amount of changeVehicle testingActivated carbonAtmospheric air
The invention discloses a desorption flow fault detecting device and method for a vehicle evaporative emission system and a vehicle. The device comprises an ECU, a pressure sensor, a flow restrictionorifice, a switching valve, a first vacuum pipeline, a second vacuum pipeline and a third vacuum pipeline. The diameter of the flow restriction orifice is smaller than an inner diameter of the secondvacuum pipeline, one end of the first vacuum pipeline is in communication with the atmosphere, the other end of the first vacuum pipeline is connected to a first end of the switching valve, the flow restriction orifice is disposed on the first vacuum pipeline, one end of the second vacuum pipeline is in communication with the atmosphere, the other end of the second vacuum pipeline is connected toa second end of the switching valve, one end of the third vacuum pipeline is connected to a third end of the switching valve, and the other end of the third vacuum pipeline communicates with an atmospheric communication port of an activated carbon canister of the vehicle or is connected to an air inlet of a desorption control valve of the vehicle, and the pressure sensor is set on the third vacuumpipeline. According to the device, the accuracy of detecting a desorption flow fault of the vehicle evaporative emission system is improved.
Owner:CHINA FIRST AUTOMOBILE
Fault detection method and system for desorption control valve of fuel evaporation and emission system
InactiveCN110821693AImprove accuracyAchieve buckElectrical controlInternal combustion piston enginesFeature dataControl valves
The invention discloses a fault detection method and system for a desorption control valve of a fuel evaporation and emission system and belongs to the technical field of vehicle emission. The methodincludes the steps that S1, feature data of a vehicle are obtained; S2, whether the feature data meet a fault detection enabling condition or not is judged; S3, an opening instruction is sent to the desorption control valve of the vehicle so that the desorption control valve can be instructed to be opened; S4, the pressure value in the fuel evaporation and emission system of the vehicle is obtained; S5, whether the pressure in the fuel evaporation and emission system of the vehicle is stable or not is judged; S6, the pressure value in the fuel evaporation and emission system of the vehicle isdetermined to be the first pressure value; S7, a closing instruction instructing the desorption control valve to be closed is sent to the desorption control valve; S8, the second pressure value in thefuel evaporation and emission system of the vehicle is obtained; and S9, when the difference value of the first pressure value and the second pressure value is larger than the preset pressure difference threshold, it is ensured that a normally-opening fault happens to the desorption control valve. By means of the method, the fault detection accuracy of the desorption control valve of the fuel evaporation and emission system is improved.
Owner:CHINA FIRST AUTOMOBILE
Tool for reducing equivalent circulating density
The invention provides a tool for reducing the equivalent circulating density. The tool comprises an outer cylinder, a one-way check valve assembly, an inner shell and a piston rod, wherein the outercylinder is put in a borehole, and a first annulus is formed between the outer cylinder and the borehole; the outer cylinder is sleeved with a sealing mechanism sealed on the inner wall of the borehole, and the first annulus is separated into an upper annulus and a lower annulus; the sidewall close to the upper end of the outer cylinder is provided with jet holes communicating with the upper annulus, and the sidewall close to the lower end of the outer cylinder is provided with inflow holes communicating with the lower annulus; the one-way check valve assembly is arranged in the outer cylinder, the inner shell is connected with the lower end of the one-way check valve assembly , and a second annulus is formed between the inner shell and the outer cylinder; the sidewall of the inner shell is provided with pressure relief holes, and the bottom wall of the inner shell is provided with a through hole; the piston rod is arranged in the inner shell, the lower end of the piston rod is arranged in the through hole in a penetrating manner, and a piston is arranged at the upper end of the piston rod; and a first flow channel is arranged in the piston, and a second flow channel communicatingwith the first flow channel in a butt joint manner is arranged in the piston rod. The tool for reducing the equivalent circulating density can reduce the equivalent circulating density, realizes the purpose of depressurization and guarantees safe and efficient well drilling.
Owner:CHINA UNIV OF PETROLEUM (BEIJING)
Method for exploiting thickened oil by steam solvent mixed injection
PendingCN113931602AReduce dosageGive full play to the advantages of synergistic viscosity reductionFluid removalDesign optimisation/simulationThermodynamicsOil water
The invention discloses a method for exploiting thickened oil by steam solvent mixed injection. The method comprises the following steps of: starting to inject a solvent at the early stage of development, firstly performing high-pressure production, and accelerating cavity expansion and oil drainage; performing pressure reduction production at the middle and later stages of development, improving the utilization efficiency of heat energy, and meanwhile strengthening solvent recovery; heating the solvent, performing phase change, enabling the solvent to enter an oil reservoir in a gas phase form, reaching the front edge under the convection action, condensing, mixing with crude oil, and reducing the viscosity of the crude oil; performing steam solvent mixed injection, reducing the partial pressure of steam, improving the dryness, and reducing the heat loss of a pipeline along the way; performing flash evaporation and heat absorption on hot water and the solvent inside a steam cavity in the pressure reduction process, thereby recovering part of heat energy inside the steam cavity, and transporting to the front edge of oil drainage; and reducing the solubility of the solvent in oil water after pressure reduction, reducing the adsorption quantity on the surface of stratum minerals, and strengthening the recovery of the solvent.
Owner:PETROCHINA CO LTD
High pressure anti-cavitation cut off ball valve with noise reduction function
The invention discloses a high pressure anti-cavitation cut off ball valve with a noise reduction function and belongs to pipeline control valves. According to the high pressure anti-cavitation cut off ball valve with the noise reduction function, the technical problems to be solved are that the ball valve cannot reduce pressure, reduce flow velocity, control noise and regulating performance is poor. An adoptive technical proposal is that the structure comprises a main valve body, a vice valve body, a valve seat, a valve rod and a ball body. The high pressure anti-cavitation cut off ball valvewith the noise reduction function has the characteristics that the vice valve body is installed on the main valve body, the valve seat is installed on a valve body which is consist of the main valvebody and the vice valve body, the ball body is installed in the valve seat and the valve rod is fixedly connected with a ball body; a low pressure fluid outlet is formed in the main valve body, a highpressure fluid inlet is formed in the vice valve body, a through hole I is formed in the ball body, the high pressure fluid inlet, the through hole I and the low pressure fluid outlet are connected in sequence; the through hole I of the ball body is internally provided with a plurality of laminations which are evenly arrayed in a laminating state and a through hole II is installed between each layer of the laminations; grooves are formed in the side walls of the laminations and the grooves and the through hole II are connected in a rectangular shape or in a sawtooth shape.
Owner:SHANDONG WALKER CONTROL VALVE CO LTD
Pressure-reducing and flow rate-increasing swtich liquid pressure source with oil returning back pressure
InactiveCN1375640ASmall pressure fluctuationsReduce dynamic lossFluid-pressure convertersPressure decreaseEngineering
The present invention discloses a pressure-decreasing flow-increasing type switch hydraulic source with oil-returning backpressure, which is characterized by that the high-speed switch valve and liquid inductance element are series-connected on the hydraulic main line oil supply pipeline, the backpressure valve is connected on the hydraulic main line oil-returning pipeline, the non-return valve and liquid volume element are respectively cross-connected between the hydraulic main line oil supply pipeline and oil-returning pipeline, the output end of the non-return valve is connected with output end of high-speed switch valve and input end of liquid inductance element, and the input end of liquid volume element is connected with output end of liquid inductance element, and the output end ofnon-return valve and output end of liquid volume element are connected with input end of backpressure valve.
Owner:ZHEJIANG UNIV
Storage safety device for volatile liquid
ActiveCN111377157ARealize automatic controlSimple structureLarge containersTank wagonsEngineeringRefrigeration
The invention discloses a storage safety device for volatile liquid, and relates to the technical field of volatile liquid storage. The device comprises a tank body, a base and a fixed seat; a condensation recovery chamber is arranged in the base; a pressure relief chamber is arranged in the fixed seat; a third through hole and a fourth through hole are respectively formed in the bottom of the pressure relief chamber; a peripheral side surface of the third through hole is fixedly connected with a pressure relief pipe; a plurality of breather pipes are mounted close to the top of the peripheralside of the tank body; one end of each breather pipe penetrates through the peripheral side of the pressure relief pipe; a third spring is mounted at one end, away from the tank body, in the breatherpipe; and one end of the third spring is fixedly connected with a sliding block. Through the design of the third spring, the sliding block, the pressure relief pipe and the pressure relief chamber, automatic pressure control can be achieved, the structure is simple, and safety is high; through the design of a refrigeration control box, a spiral condensation pipe and the condensation recovery chamber, gas liquefaction can be achieved, the temperature in a spiral condensation pipe is reduced, the tank body is effectively cooled, liquid volatilization is reduced, and the safety is high.
Owner:义乌市研创工业设计有限公司
Three-phase isolation AC-DC converter
ActiveCN111193421AEasy to achieve high frequencyImprove efficiencyAc-dc conversion without reversalEfficient power electronics conversionHemt circuitsControl theory
The invention discloses a three-phase isolation AC-DC converter. The three-phase isolation AC-DC converter comprises a primary side, a secondary side and a resonant network, upper and lower bridge arms of each phase of a primary side adopt a group of common-source anti-series switching tubes with the same structure, a resonance network adopts an LLC series resonance structure, and a secondary siderectification side adopts a rectification circuit. The power device of the primary side circuit of the topology can realize zero-voltage soft switching (ZVS) and can realize a power factor correctiontechnology (PFC) function at the same time. According to the converter, the power factor correction technology and the resonance soft switching technology are combined, so that the input current of the converter changes well along with the input voltage, and the PFC function is realized; the converter realizes stable direct-current voltage output by controlling output voltage; and meanwhile, theconverter is provided with a high-frequency transformer, so that an electrical isolation function can be realized.
Owner:南昌杜迪电子技术有限公司
Valve control device with remote monitoring function
PendingCN114857340ARealize remote monitoringRealize automatic adjustmentOperating means/releasing devices for valvesServomotor componentsEngineeringPiston rod
The valve control device with the remote monitoring function comprises a valve body, a feeding pipe and a discharging pipe are connected to the valve body, a pressure sensor is installed in the feeding pipe, a box body is installed on the valve body through a supporting rod, a flow control assembly is arranged on the box body, a working cavity is formed in the box body, and a valve rod is installed in the working cavity. A piston is slidably installed in the working cavity, a piston rod is installed on the piston, a sliding hole is formed in the bottom of the box body, the piston rod penetrates through the sliding hole, a valve element is arranged in a valve cavity of the valve body, a valve hole is formed in the valve cavity, and a valve rod is installed on the valve element. When the valve is opened, materials in the feeding pipe can be extruded, so that the materials can generate acting force on the pressure sensor, the pressure sensor feeds back data of the condition in the feeding pipe to a remote terminal, remote monitoring of the condition of the valve is achieved, and at the moment, the remote terminal can achieve automatic adjustment of the valve through the flow control assembly.
Owner:常州伊迈科思自动化科技有限公司
Parallel type advection plunger pump
ActiveCN108150377AStable outputReduce eccentric wearPositive displacement pump componentsPump installationsEnvironmental engineeringLife support
The invention relates to a parallel type advection plunger pump, which comprises a drive transmission module (1), a cylinder body plunger module (2) and a complete machine support (3). The parallel type advection plunger pump provided by the invention can be used for accurately and quantitatively conveying a required liquid, and a liquid flow is not influenced by backward-stage pressure fluctuation, so that the liquid is ensured to be output continuously and stably. The device provided by the invention is mainly used in a water purification system in an environmental control and life support subsystem in a space station, provides current-rated water to be treated to a purifier, can ensure the output accuracy to be unaffected when the pressure in the purifier is changed, and has the characteristics of accuracy in supplying, capability of being unaffected by backward-stage pressure, high output efficiency and output continuousness. The device provided by the invention adopts a novel series seal structure, so that the product processing difficulty is reduced, the product accuracy is ensured, the requirements on sealing reliability and long service life of the plunger pump are met, thereliable operation of a water purification system is ensured, and a special working condition demand can be met.
Owner:BEIJING SATELLITE MFG FACTORY
Tools to Reduce Equivalent Cycle Density
The invention provides a tool for reducing the equivalent circulating density. The tool comprises an outer cylinder, a one-way check valve assembly, an inner shell and a piston rod, wherein the outercylinder is put in a borehole, and a first annulus is formed between the outer cylinder and the borehole; the outer cylinder is sleeved with a sealing mechanism sealed on the inner wall of the borehole, and the first annulus is separated into an upper annulus and a lower annulus; the sidewall close to the upper end of the outer cylinder is provided with jet holes communicating with the upper annulus, and the sidewall close to the lower end of the outer cylinder is provided with inflow holes communicating with the lower annulus; the one-way check valve assembly is arranged in the outer cylinder, the inner shell is connected with the lower end of the one-way check valve assembly , and a second annulus is formed between the inner shell and the outer cylinder; the sidewall of the inner shell is provided with pressure relief holes, and the bottom wall of the inner shell is provided with a through hole; the piston rod is arranged in the inner shell, the lower end of the piston rod is arranged in the through hole in a penetrating manner, and a piston is arranged at the upper end of the piston rod; and a first flow channel is arranged in the piston, and a second flow channel communicatingwith the first flow channel in a butt joint manner is arranged in the piston rod. The tool for reducing the equivalent circulating density can reduce the equivalent circulating density, realizes the purpose of depressurization and guarantees safe and efficient well drilling.
Owner:CHINA UNIV OF PETROLEUM (BEIJING)
A pull-out folding storage device for textile fabric conveying
ActiveCN114538209BRealize storageEasy to fold and storeBio-packagingEngineeringMechanical engineering
The invention provides a pull-out folding storage device for textile cloth transportation, which relates to the technical field of folding storage, comprising: a box body, an inner bottom of the box body is integrally provided with an air plate in the middle, and the sides of the air plate are provided with an air plate. Radial through holes are provided; guide grooves are fixedly arranged at the rear ends of the inner walls on both sides of the box body, and the top of the guide groove is set as a limit structure; the lifting bar and the pressing link according to the various embodiments of the present invention are provided for the storage device. In order to assist the folding and unfolding effect, the fabric or textile product is wound through the hinge shafts of different connecting rods in turn, and the connecting rod is pressed to form a folded state, and the fabric or textile product is stored in a folded state inside the box to achieve storage. , and the cloth or textile product can be unfolded while pulling out the clothespin, which solves the problem that the currently used storage device mainly rolls or stacks the fabric to realize storage, and does not have an auxiliary folding structure for convenient combing and unfolding.
Owner:如东博尔鑫工贸有限公司
Axial multi-stage pressure reduction sleeve and multi-stage pressure reduction valve containing same
ActiveCN110645369ARealize step-by-step step-downHigh adjustment accuracyValve members for absorbing fluid energySlide valveEngineeringPressure reduction
The invention relates to an axial multi-stage pressure reduction sleeve and a multi-stage pressure reduction valve containing the same. The sleeve comprises a plurality of layers of disc sheets whichare arranged at intervals in the axial direction, wherein a plurality of through holes are uniformly distributed in each disc sheet by taking the center as a circle center; and the through holes in the adjacent disc sheets are distributed in a staggered manner in the radial direction, and the total area of the through holes in each disc sheet is progressively increased in sequence. The pressure reduction valve comprises a hollow valve body, wherein the sleeve is installed on the inner bottom surface of the valve body, a valve element is installed in a valve element hole in the middle part of the sleeve, and the valve element moves in the axial direction of the sleeve under the driving of a valve rod, and the bottom of the valve element is level with one layer of the disc sheets on the sleeve; and a fluid enters from an inlet, flows in a detouring manner via the through holes in the disc sheets and interlayer flow channels among the disc sheets, and then flows into the valve body and flows out, the fluid forms friction with the disc sheets during the detouring flowing, and then energy is lost, so that pressure loss is caused, and pressure reduction is realized. The pressure adjustment valve is ingenious in structure, small in size, capable of adjusting a pressure reduction coefficient through the position of the valve element, high in accuracy, long in service life, and low in cost.
Owner:CHINA SHIP SCIENTIFIC RESEARCH CENTER (THE 702 INSTITUTE OF CHINA SHIPBUILDING INDUSTRY CORPORATION)
A parallel structure hybrid excitation brushless motor and its power generation system
ActiveCN110829662BArmature voltage regulationReduce capacitySynchronous generatorsMagnetic circuit rotating partsBrushless motorsSynchronous reluctance motor
The invention discloses a parallel structure hybrid excitation brushless motor and its power generation system, comprising a parallel structure hybrid excitation brushless motor, a power converter, a power supply, an uncontrollable rectifier, a DC electrical load and an AC electrical load. The parallel structure hybrid excitation brushless motor includes a permanent magnet synchronous motor and an electric excitation synchronous reluctance motor arranged in parallel with a common rotating shaft; the permanent magnet synchronous motor includes an armature stator, a synchronous rotor and a permanent magnet; the armature stator is wound with an armature winding 1. The electric excitation synchronous reluctance motor includes an excitation stator and a reluctance rotor; the excitation stator is wound with two armature windings and an AC excitation winding, and the first and two phases of the armature winding are connected in series to form the total armature winding; the poles of the synchronous rotor are The number of pole pairs is equal to that of the reluctance rotor. By adjusting the magnitude and direction of the direct axis excitation current in the excitation winding, the voltage regulation of the total armature winding can be achieved. The invention has the advantages of high power density, adjustable magnetic field and no coupling between the excitation magnetic field and the permanent magnetic field.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
A new type of electric heating equipment with high efficiency and energy saving
The invention provides novel electric heating equipment capable of efficiently saving energy. The novel electric heating equipment comprises a working box, a liquid delivery mechanism, an energy-saving auxiliary mechanism, a heating mechanism, a temperature display mechanism and a pressure relieving mechanism; a liquid draining pipe is installed on the lower portion of the working box, an exhaust outlet is formed in the top of the working box, and multiple condensing nets are installed on the upper portion of the working box; the liquid delivery mechanism comprises a liquid delivery device and a spray head, the liquid delivery device is installed on the upper portion of the working box, and the spray head is installed on the liquid delivery device and located over the condensing nets; the heating mechanism is installed on the lower portion of the working box; the temperature display mechanism comprises a transparent liquid storing pipe and a first sliding block, the transparent liquid storing pipe is partially located in the working box, and the first sliding block is movably installed in the transparent liquid storing pipe and matched with the transparent liquid storing pipe in a liquid sealing mode; the pressure relieving mechanism comprises multiple moving rods, multiple first reset parts and an obstruction block. The novel electric heating equipment is convenient to use, good in energy saving effect and high in safety.
Owner:安徽易众电气科技有限公司
Sealing assembly for rotary machine
The invention discloses a sealing assembly for a rotary machine. The rotary machine comprises a stator and a rotor. The sealing assembly comprises a brush type sealing part, a honeycomb sealing part and a fingertip sealing part, the brush type sealing part, the honeycomb sealing part and the fingertip sealing part are suitable for being arranged on the stator, the brush type sealing part and the fingertip sealing part are arranged alternately in the axial direction of the rotor, the honeycomb sealing part is arranged between the brush type sealing part and the fingertip sealing part and is opposite to sealing teeth arranged on the surface of the rotor, and the honeycomb sealing part and the sealing teeth form labyrinth seal. The sealing assembly for the rotary machine has the advantages that the sealing effect is good, in addition, the service life is long, the required sealing space is small, and the applicability is improved.
Owner:CHINA UNITED GAS TURBINE TECH CO LTD
Vehicle evaporative emission system desorption flow fault detection device, method and vehicle
ActiveCN110361198BAchieve buckIncrease the amount of changeVehicle testingActivated carbonControl valves
The invention discloses a vehicle evaporation emission system desorption flow failure detection device, method and vehicle. The device includes: ECU, pressure sensor, throttle hole, switching valve, first vacuum pipeline, second vacuum pipeline and third vacuum tube The diameter of the orifice is smaller than the inner diameter of the second vacuum pipeline, one end of the first vacuum pipeline is connected to the atmosphere, the other end of the first vacuum pipeline is connected to the first end of the switching valve, and the orifice is set on the first vacuum pipeline , one end of the second vacuum line is connected to the atmosphere, the other end of the second vacuum line is connected to the second end of the switching valve, one end of the third vacuum line is connected to the third end of the switching valve, and the other end of the third vacuum line is connected to the The atmospheric communication port of the activated carbon tank of the vehicle is connected, or connected with the air inlet of the desorption control valve of the vehicle, and the pressure sensor is arranged on the third vacuum pipeline. This device improves the detection accuracy of the desorption flow failure of the vehicle evaporative emission system. sex.
Owner:CHINA FIRST AUTOMOBILE
Oil measuring indicator for hydraulic pipeline and detecting method of indicator
PendingCN110410384AReduce the effects of frictionRealize overload protectionFluid-pressure actuator safetyFluid-pressure actuator testingCylinder headMaterial resources
The invention relates to an oil measuring indicator for a hydraulic pipeline and a detecting method of the indicator, belonging to the field of mechanical testing. The large cavity end of a cylinder body is in threaded connection with a sealing cylinder head which is in threaded connection with a liquid filling device, and a small cavity oil replenishing device is in threaded connection with the small cavity end of the cylinder body; the T-shaped inner end of a piston of a T-shaped moving steel rod system is slidably connected with the inner part of the cylinder body, while the outer end is located outside the cylinder body; one end of the moving steel rod system is located in a seat on the sealing cylinder head, and the other end of the moving steel rod system is located in piston of theT-shaped moving steel rod system; the two ends of an indicating pipeline are respectively connected with connecting holes in the large cavity and the small cavity of the cylinder body in a sealing manner, and the indicating pipeline is filled with an indicating medium; an annular piezoelectric ceramic is fixedly connected with a pressure signal conversion piston and an opening of the indicating pipeline. The oil measuring indicator for the hydraulic pipeline and the detecting method of the indicator have the advantages of novel structure, high practicability and wide application range, provideconvenience for maintenance of various hydraulic pipelines, save manpower and material resources, and can greatly improve work efficiency in actual production and application.
Owner:宋彦宏
Compatibility-Based Measuring Test Device for Refrigerant Compressor Oil Circulation Rate
ActiveCN103939324BGuaranteed efficient separationImprove work efficiencyPump testingPositive-displacement liquid enginesOil separationEngineering
The invention belongs to the technical field of refrigeration, and particularly relates to a refrigerant compressor oil circulation rate measuring and testing device based on intermiscibility. The device comprises an oil separation assembly which is provided with an oil outlet end and a refrigerant outlet end, the refrigerant outlet end is at least communicated with a compressor air suction port end at least through a condenser, a liquid storage device and an evaporator to form a refrigerant loop, the oil outlet end is communicated with a compressor air suction oil return port to form an oil circulation loop, and flow meters are arranged on the oil circulation loop and the refrigerant loop. The device further comprises a refrigeration assembly, and liquid supply temperature of the refrigeration assembly is lower than the highest two-phase separation temperature of a refrigerant and refrigerator oil. The device improves work efficiency of a whole oil circulation system, meanwhile, values measured by the flow meters on the loops are more accurate, and finally precision of oil circulation flow rate measurement data of a refrigerant compressor is guaranteed.
Owner:HEFEI GENERAL MACHINERY RES INST +1
Motor matrix cascade control circuit
ActiveCN114244205AIncrease flexibilityImprove securityAC motor controlDynamo-electric converter controlElectric machineryHemt circuits
The invention discloses a motor matrix cascade control circuit, which comprises a power supply circuit and a controller circuit, and is characterized in that the power supply circuit is connected with the controller circuit; the power supply circuit comprises a working power supply input interface, a system power supply load switch, a motor power supply load switch, a sensor power supply load switch, a CAN transceiver power supply load switch, a first voltage stabilizing circuit, a second voltage stabilizing circuit and a third voltage stabilizing circuit. The controller circuit comprises a main controller, a sensor interface circuit, an isolation CAN transmit-receive interface circuit and a motor interface circuit. According to the invention, the highly integrated motor matrix cascade control circuit is arranged, so that the flexibility of the controller circuit capable of being matched with peripheral equipment is high, and power supply load switches are allocated to each power supply, so that the circuit is isolated, and the working stability of the system is improved.
Owner:深圳奕航智能有限公司
Parallel parallel flow plunger pump
ActiveCN108150377BStable outputReduce eccentric wearPositive displacement pump componentsPump installationsEnvironmental engineeringLife support
The invention relates to a parallel type advection plunger pump, which comprises a drive transmission module (1), a cylinder body plunger module (2) and a complete machine support (3). The parallel type advection plunger pump provided by the invention can be used for accurately and quantitatively conveying a required liquid, and a liquid flow is not influenced by backward-stage pressure fluctuation, so that the liquid is ensured to be output continuously and stably. The device provided by the invention is mainly used in a water purification system in an environmental control and life support subsystem in a space station, provides current-rated water to be treated to a purifier, can ensure the output accuracy to be unaffected when the pressure in the purifier is changed, and has the characteristics of accuracy in supplying, capability of being unaffected by backward-stage pressure, high output efficiency and output continuousness. The device provided by the invention adopts a novel series seal structure, so that the product processing difficulty is reduced, the product accuracy is ensured, the requirements on sealing reliability and long service life of the plunger pump are met, thereliable operation of a water purification system is ensured, and a special working condition demand can be met.
Owner:BEIJING SATELLITE MFG FACTORY
A three-phase isolated ac-dc converter
ActiveCN111193421BEasy to achieve high frequencyImprove efficiencyAc-dc conversion without reversalEfficient power electronics conversionConvertersHemt circuits
Owner:南昌杜迪电子技术有限公司
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