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32results about How to "Flexible and reliable control" patented technology
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Vehicle charging converter with high efficiency
InactiveCN107846151AReduce current stressAccurate perceptionAc-dc conversion without reversalEfficient power electronics conversionMOSFETTransformer
The invention discloses a vehicle charging converter with high efficiency. The vehicle charging converter with high efficiency includes successively connected EMI circuit, a PFC circuit, an inversioncircuit, a rectification circuit, an output circuit and a control circuit, wherein the EMI circuit is used for reducing the influence of high frequency noise of the converter on the power grid; on thepremise of guaranteeing the quality of the input current, the PFC circuit can convert the single phase alternating current into the high voltage direct current; the inversion circuit converts the high voltage direct current into high frequency square wave which is adjustable in frequency; the rectification circuit performs rectification after performing transformer isolation of the rectificationcircuit to obtain stable direct current voltage; and finally the high frequency current ripple is filtered and then is output by the output circuit, and the control circuit completes acquisition, calculation and output of the controlled quantity of the converter, and then operating and protection of the vehicle charging converter can be realized. In the vehicle charging converter with high efficiency, the PFC circuit and the inversion circuit respectively use GaN HEMT and Si MOSFET as the main switch devices; by means of combination with the advantages of a wide-gap semiconductor device and atotem PFC topology, the vehicle charging converter with high efficiency has the advantages of being good in the grid side harmonic wave characteristic, being small in volume, being flexible in control, and greatly improving the conversion efficiency of vehicle charging.
Owner:HUAZHONG UNIV OF SCI & TECH
Current-equalizing pneumatic heat exchanging bed
ActiveCN101629717AFlexible and reliable controlNo mechanical failureFluidized bed combustionApparatus for fluidised bed combustionEngineeringDistributor
The invention is a current-equalizing pneumatic heat exchanging bed for a circulating fluidized bed boiler (CFBB), comprising a feed bin 1, a high-temperature bin 2, a current-equalizing bin 3, a heat exchanging bin 4, a low-temperature bin 5, a wind box 16 of each bin and the bottom part thereof, an air distributor 15, a hood 14, an air duct 18 and a wind speed control device 19 to form an independent and operable integral. The shunting ratio of circulating ash can be controlled by adjusting wind speed of each bin, part of circulating ash directly goes back to a furnace 20, and the other part thereof goes back to the furnace 20 after being cooled by a heating surface 6. The invention uses a pneumatic method for realizing shunting and controlling of the circulating ash, has the advantages of wide adjusting range, evenly heat exchanging, no abrasion and tube explosion and mechanical fault, and is applicable to large-scale circulating fluidized bed boiler (CFBB).
Owner:XIAN THERMAL POWER RES INST CO LTD
Nuclear power steam generator pipe detection robot
InactiveCN101364452AEasy accessLower requirementNuclear energy generationNuclear monitoringNuclear powerDrive shaft
The invention provides a pipeline inspection robot for a nuclear steam generator, which comprises two pawing mechanisms hinged with an upper cantilever via a driving shaft and a lower cantilever via a driven shaft. The upper cantilever is composed of two segments which are hinged with each other via a driving shaft; the lower cantilever is composed of two segments which are hinged with each other via a driven shaft; a motor is connected with the lower ends of both the driving shaft between the upper cantilever and the two pawing mechanisms and the driving shaft between the two segments of the upper cantilever; and a potentiometer is arranged at the upper end of each driving shaft and is connected with a sensor guide arm which is hinged with a fixed column fixed on the upper cantilever. The pipeline inspection robot has the following advantages: small volume, so as to be easy to be put into the steam generator by an operator through a narrow manhole; convenient energy availability, and flexible and reliable control; cantilever structure with a relatively large working radius after being unfolded; low requirements for the motor, and reliable operation; and good adaptability of replacement parts to different apertures and aperture plates.
Owner:HARBIN ENG UNIV
Ground cleaner and control method thereof
InactiveCN106175603AImprove cleanlinessFlexible and reliable controlFloor sweeping machinesEngineeringAirflow
The invention provides a ground cleaner and a control method thereof. The ground cleaner comprises a walking sweeping module, a fan module, an image shooting module and a control device, wherein the walking sweeping module is configured to be driven by an internal driving device to move on the ground in a to-be-swept area so as to execute cleaning; the fan module is detachably arranged above the walking sweeping module to produce airflow for sucking dust on the ground into the walking sweeping module; the image shooting module is arranged above the fan module and used for shooting images of the surrounding environment of the walking sweeping module; the control device is configured for acquiring the images and adjusting moving states of the walking sweeping module through the driving device according to the images, and the walking sweeping module is enabled to change the moving direction and / or the moving speed. With the adoption of the scheme, on one hand, all parts can be flexibly assembled, the structure is simple, and the assembling is convenient; on the other hand, the ground cleaner is flexible and convenient to control and is convenient to use.
Owner:QINGDAO HAIGAO DESIGN MFG CO LTD
Image processing based gate machine control device of parking place
InactiveCN105113438AFlexible and reliable controlSave laborIndividual entry/exit registersTraffic restrictionsImaging processingMachine control
The invention discloses an image processing based gate machine control device of a parking place. The gate machine control device comprises a gate machine body, a barrier gate arranged on the gate machine body, a distance induction unit, a camera unit, a control unit, a storage unit, a driving unit and a servo motor, wherein an output shaft of the servo motor is connected with the barrier gate; the control unit comprises an extracting module, a processing module and a matching module; the distance induction unit is used for detecting vehicles and obtaining detection signals; the camera unit is used for extracting vehicle images; the extracting module is used for recognizing and extracting license plate numbers; the storage module is used for storing license plate numbers in advance; the processing module is used for receiving the extracted license plate numbers and retrieving the license plate numbers stored in advance; the matching module is used for matching the license plate numbers and outputting control signals when the matching passes; the driving unit is used for driving the servo motor so as to open the barrier gate. The gate machine control device disclosed by the invention realizes an intelligent control process, and the artificial recognition of vehicles and the artificial control of the barrier gate are not needed, so that the manpower is saved.
Owner:SUZHOU XUANHE IOT TECH
Electromechanical equipment monitoring system for urban rail transportation
ActiveCN108170110AHigh degree of automationFlexible and reliable controlMeasurement devicesTotal factory controlCurrent meterNetwork connection
The invention discloses an electromechanical equipment monitoring system for urban rail transportation. The system is composed of a main control server and a plurality of sub control servers that arein network connection. The main control server consists of a storage module and a dispatch instruction response module. Each sub control server includes a parameter monitoring module and is used for collecting an operation state of electromechanical equipment monitored by the sub control server at a current time in real time, inquiring a system linkage control strategy table of the main control server in real time, comparing the operation state of the electromechanical equipment at the current time with the system linkage control strategy table, acquiring a comparison result indicating normaloperation or abnormal operation of the electromechanical equipment, and carrying out linkage controlling on the electromechanical equipment based on the comparison result. The electromechanical equipment monitoring system has characteristics of high efficiency and stability, high degree of automation, and high flexibility and reliability.
Owner:CCCC MECHANICAL & ELECTRICAL ENG
Resistance-free electric spark pulsed power source and processing method and gap discharge state recognition state thereof
The invention discloses a resistance-free medium wire feed pulsed power source and a processing method and gap discharge state recognition state thereof. A circuit comprises a power loop, a drive circuit, an FPGA controller, a voltage detection circuit and a current detection circuit. When a first switch pipe is turned on to the maximum wait breakdown time threshold value, the gap voltage in the time frame is detected, the average voltage is calculated, and of the average voltage is a floating voltage, a gap is recognized in an idling state; otherwise, the first switch pipe is turned off, after dead time, when a second switch pipe is turned on, the gap current is detected, changes of the current descending slope are calculated, if the slope change rate exceeds the descending slope change rate threshold value, the gap is recognized as a short circuit, and if the slope hardly changes or changes slightly, the gap is recognized as normal discharge; and according to the recognized gap state, necessary bases are provided for the feed direction and speed of a servo system. The recognition precision of the gap discharge state of the power source is improved, and then the processing efficiency and discharge rate of the power source are improved.
Owner:NANJING UNIV OF SCI & TECH
Various air source feeding device for high-pressure large-flow gas experiment
ActiveCN110873286ARich varietyIncrease pressureVessel mounting detailsMeasurement apparatus componentsGas cylinderDisplay device
The invention relates to a various air source feeding device for high-pressure large-flow gas experiment. The various air source feeding device comprises a gas delivery loop, gas state control equipment and a gas parameter collecting system, wherein the gas delivery loop comprises a gas cylinder; an outlet of the gas cylinder is connected with a gas inlet of a testing section through a pipeline; the gas state control equipment comprises a high-pressure stop valve, an electric decompressing valve and an electric heater arranged on a connecting pipeline between the gas cylinder and the testing section, and an electric control valve arranged at an outlet of the testing section; and the gas parameter collecting system comprises a pressure sensor I for collecting the outlet pressure of the gascylinder, a pressure sensor II for collecting the inlet pressure of gas in the testing section, a temperature sensor I for collecting the temperature of the gas before being heated by the electric heater, a temperature sensor II for collecting the temperature of the gas after being heated by the electric heater, a flowmeter for collecting the inlet flow of the gas in the testing section and a datacollecting and displaying device. Through the adoption of the various air source feeding device disclosed by the invention, high-back pressure, high-flow and multi-gas kind testing environments can be provided.
Owner:XI AN JIAOTONG UNIV
Tractor front wheel speedup steering device and steering system
The invention relates to a tractor front wheel speedup steering device and a steering system, the steering device comprises a rear axle housing, an input shaft, an idler shaft and a transfer case output shaft, and the input shaft, the idler shaft and the transfer case output shaft are parallel to one another and are respectively rotatably connected in the rear axle housing; a transfer case driving gear is connected to the input shaft through a spline, a non-multiplied-speed idle gear and a multiplied-speed idle gear are connected to the idle gear shaft through splines, a non-multiplied-speed driven gear and a multiplied-speed driven gear are movably connected to the transfer case output shaft, the transfer case driving gear is meshed with the non-multiplied-speed idle gear, the non-multiplied-speed idle gear is meshed with the non-multiplied-speed driven gear, and the multiplied-speed idle gear is meshed with the multiplied-speed driven gear. The multi-speed idle gear is meshed with the multi-speed driven gear; a first clutch and a second clutch are arranged on the transfer case output shaft, the first clutch is correspondingly matched with the non-multiplied-speed driven gear and drives the transfer case output shaft to enter a four-wheel drive mode or a two-wheel drive mode, and the second clutch is correspondingly matched with the multiplied-speed driven gear and drives the transfer case output shaft to enter a multiplied-speed mode or a two-wheel drive mode.
Owner:LOVOL HEAVY IND
Magnetic driving food processer
InactiveCN110151014AFlexible and reliable controlEnsure safetyKitchen equipmentEngineeringControl circuit
The invention provides a magnetic driving food processer, which comprises a machine base (1) and a food processing cup (2) arranged on the machine base (1). The food processing cup (2) is internally provided with a smashing component (3), a motor (10) driving the smashing component (3) to rotate is arranged in the machine base (1), and a magnetic conduction piece (4) is arranged on the smashing component (3); and an electromagnetic component (12) matched with the magnetic conduction piece (4) is arranged on the motor (10), and a carbon brush component (13) controlling circuit on-off of the electromagnetic component (12) is arranged in the machine base (1). Circuit on-off of the electromagnetic component is controlled through the carbon brush component arranged in the machine base, thus a circuit of the electromagnetic component arranged above the motor and matched with the magnetic conduction piece is controlled more flexibly and reliably, and the using safety of the magnetic driving food processer is guaranteed.
Owner:ZHEJIANG SHAOXING SUPOR DOMESTIC ELECTRICAL APPLIANCE CO LTD
Synthetic jet actuator and horizontal-axis wind turbine blade
InactiveCN107893796ASimple structureSmall sizeCircuit elementsMachines/enginesElectricityTurbine blade
The invention provides a synthetic jet actuator which performs periodic air blowing and suction through repeated oscillation of a piezoelectric film to convert consumed electric energy into fluid kinetic energy. The synthetic jet actuator comprises a cavity, the long-strip-shaped piezoelectric film, a long-strip-shaped piezoelectric actuator and an air bleeding channel; the cavity has a lower opening and an upper opening; the area of the section of the lower opening is larger than that of the section of the upper opening; the long-strip-shaped piezoelectric film covers the lower opening in a matched manner; the long-strip-shaped piezoelectric actuator is arranged below the piezoelectric film; the air bleeding channel is connected with the upper opening in a matched manner; and the long-strip-shaped piezoelectric actuator is driven by a rectangular pulse signal to have the inverse piezoelectric effect, the piezoelectric film is driven to oscillate up and down periodically, air in the cavity oscillates along with the piezoelectric film, and then the periodic air blowing and suction effect is produced in the air bleeding channel. The invention further provides a horizontal-axis wind turbine blade comprising the synthetic jet actuator. By the aid of the blade, flowing control can be realized, so that the strength of the trailing vortex of a wind turbine is reduced, the dissipationof the trailing vortex is accelerated, oscillation of the wind turbine blade is reduced, and the service life of the wind turbine is prolonged.
Owner:UNIV OF SHANGHAI FOR SCI & TECH
Long-stroke hydraulically-controlled natural gas compressor
InactiveCN104595155AExtended service lifeSlow downPumpsPositive-displacement liquid enginesExhaust valveGas cylinder
The invention relates to a long-stroke hydraulically-controlled compressor in natural gas industry. The invention adopts the technical scheme as follows: a primary gas inlet valve and a secondary gas inlet valve are mounted at the upper parts of two ends of a gas cylinder, wherein a primary gas outlet valve and a secondary gas outlet valve are mounted on the lower parts of two ends of the gas cylinder; a gas inlet pipeline is connected to the primary gas inlet valve; the primary gas outlet valve, a heat exchanger, a reversing valve and the secondary gas inlet valve are connected in series through a pipeline; the bottom of the gas cylinder is in flange connection with a piston ring; a head of the cylinder is in threaded connection with an end cover; one end of an oil cylinder sleeve is in threaded connection with the piston ring; the other end of the oil cylinder sleeve is in clearance fit with the end cover; one end of a piston rod is placed in an inner cavity of the oil cylinder in a clearance fit manner; a lug ring on one end of the piston ring is hinged to a rack; the gas cylinder is fixedly connected to the rack. The long-stroke hydraulically-controlled compressor is long in stroke; the liquid compact can be avoided; a moving part is low in speed, low in noise and long in service life; the compressor is wholly prized; a hydraulic control manner is adopted, so that the compressor is flexible and reliable to control; the compressor can be applied to processes of discharging water and extracting gas, mixing and conveying gas and liquid and recycling scattered gas; the compressor is highly adaptive to variable working conditions.
Owner:CHENGDU TINGYUAN TECH
Nuclear power steam generator pipe detection robot
InactiveCN101364452BEasy accessLower requirementNuclear energy generationNuclear monitoringDrive shaftNuclear power
The invention provides a pipeline inspection robot for a nuclear steam generator, which comprises two pawing mechanisms hinged with an upper cantilever via a driving shaft and a lower cantilever via a driven shaft. The upper cantilever is composed of two segments which are hinged with each other via a driving shaft; the lower cantilever is composed of two segments which are hinged with each othervia a driven shaft; a motor is connected with the lower ends of both the driving shaft between the upper cantilever and the two pawing mechanisms and the driving shaft between the two segments of theupper cantilever; and a potentiometer is arranged at the upper end of each driving shaft and is connected with a sensor guide arm which is hinged with a fixed column fixed on the upper cantilever. The pipeline inspection robot has the following advantages: small volume, so as to be easy to be put into the steam generator by an operator through a narrow manhole; convenient energy availability, andflexible and reliable control; cantilever structure with a relatively large working radius after being unfolded; low requirements for the motor, and reliable operation; and good adaptability of replacement parts to different apertures and aperture plates.
Owner:HARBIN ENG UNIV
Master-slave operation mechanical arm control master manipulator
PendingCN112109064AMultiple degrees of freedomMultiple key signalsProgramme-controlled manipulatorAviationConnection control
A master-slave operation mechanical arm control master manipulator comprises a mechanical shell, a handle and a plurality of joint sensors, wherein the mechanical shell comprises a bottom shaft assembly, a second shaft assembly, a second-third shaft connecting part assembly, a third shaft assembly, a fourth shaft assembly and a fifth shaft assembly, a switching circuit board is embedded in the bottom shaft assembly, and a driving circuit board and a control card board are embedded in the handle; and the switching circuit board is electrically connected with an external master-slave controllerthrough an aviation connector, the control card board is electrically connected with the switching circuit board through serial port communication and connection interfaces, the driving circuit boardis electrically connected with the switching circuit board through servo driving communication and connection interfaces, the joint sensors are used for collecting angle signals of swing motion, and each joint sensor comprises an encoder and a servo steering engine. Complex master arm signal transmission can be achieved, and multiple degrees of freedom and multiple switch button signals are achieved.
Owner:浙江凯富博科科技有限公司
Aluminum strip cast rolling hydraulic controlled casting and controlled rolling equipment and method
PendingCN112024612AImprove roll gap adaptabilityFlexible controlRoll force/gap control deviceHydraulic cylinderNonferrous metal
The invention belongs to the technical field of non-ferrous metal cast rolling production, and relates to aluminum strip cast rolling hydraulic controlled casting and controlled rolling equipment andmethod. According to the equipment, casting rollers are locked in a determined plane through a lifting hydraulic cylinder and a roller adjusting hydraulic cylinder, and casting roller seams, the lifting hydraulic cylinder and the roller adjusting hydraulic cylinder can operate according to a determined mathematical relationship; position sensors are installed in the lifting hydraulic cylinder andthe roller adjusting hydraulic cylinder; the casting rollers and a bearing seat are connected with the lifting hydraulic cylinder and the roller adjusting hydraulic cylinder respectively; the hydraulic controlled casting and controlled rolling equipment further comprises a rack, all the equipment bodies are connected into a closed whole through the rack; and the hydraulic system is provided with ahydraulic sensor and a pressure sensor. According to the equipment, flexible and controllable roll seams can be formed between the casting rollers, the roller seam adjusting capacity of the casting rollers is improved, the cast rolling capacity of the casting rollers can be effectively improved, efficient cast rolling production is met, and the quality of produced products is guaranteed.
Owner:CISDI ENG CO LTD
Urban Rail Transit Electromechanical Equipment Monitoring System
ActiveCN108170110BFlexible and reliable controlHigh degree of automationMeasurement devicesProgramme total factory controlRail transitServer
The invention discloses an electromechanical equipment monitoring system for urban rail transportation. The system is composed of a main control server and a plurality of sub control servers that arein network connection. The main control server consists of a storage module and a dispatch instruction response module. Each sub control server includes a parameter monitoring module and is used for collecting an operation state of electromechanical equipment monitored by the sub control server at a current time in real time, inquiring a system linkage control strategy table of the main control server in real time, comparing the operation state of the electromechanical equipment at the current time with the system linkage control strategy table, acquiring a comparison result indicating normaloperation or abnormal operation of the electromechanical equipment, and carrying out linkage controlling on the electromechanical equipment based on the comparison result. The electromechanical equipment monitoring system has characteristics of high efficiency and stability, high degree of automation, and high flexibility and reliability.
Owner:CCCC MECHANICAL & ELECTRICAL ENG
Vehicle-mounted wireless charging controller
PendingCN110752638AFlexible and reliable controlAddressing Personal InjuryBatteries circuit arrangementsElectric powerIn vehicleEngineering
The present invention relates to a vehicle-mounted wireless charging controller for wireless charging of a device to be charged. The vehicle-mounted wireless charging controller comprises a shell forsupporting the device to be charged, a coil disposed on a side, away from the device to be charged, of the shell for forming thermal contact with the side of the shell, and a temperature detection module for detecting a first temperature of the side, tightly close to the coil, of the shell; and the vehicle-mounted wireless charging controller is characterized by further comprising a main calculation module which is used for calculating the second temperature of one side, close to the device to be charged, of the shell based on the first temperature measurement from the temperature detection module, a physical parameter associated with the shell, and a heat conduction power value associated with the coil.
Owner:CONTINENTAL AUTOMOTIVE (CHANGCHUN) CO LTD
Fermentation tank and dry anaerobic fermentation system and method including same for co-processing municipal solid waste and municipal sludge
ActiveCN108467170BImprove processing outletChoose accuratelyBioreactor/fermenter combinationsBio-organic fraction processingNew energyProcess engineering
The invention relates to the field of fermentation engineering, and relates to a fermentation tank and a dry anaerobic fermentation system comprising the same and cooperatively processing municipal domestic waste and municipal sludge and a dry anaerobic fermentation method. The system comprises a material mixing injection system, an anaerobic fermentation system, a re-circulating system and a discharging and dehydrating system, wherein the municipal domestic waste, the municipal sludge, agricultural waste and other complex organic wastes are cooperatively subjected to anaerobic digestion treatment with high solid content, so that the treatment way of the municipal domestic waste is found, the waste is changed into wealth, and a new energy source is provided.
Owner:营口同方能源技术有限公司
Intelligent lock and deceleration assembly thereof
InactiveCN111119592AGood technical effectFlexible and reliable controlNon-mechanical controlsElectric machineGear wheel
The invention relates to the field of locks, and discloses an intelligent lock and a deceleration assembly thereof. The intelligent lock comprises a shell body (4), a motor (1) and a worm (2), whereinthe motor (1) is provided with the worm (2). The intelligent lock further comprises a turbine (3), a gear unit (10), a driving gear (5) and a rotating shaft (8), wherein the worm (2) is meshed with the turbine (3), the turbine (3) is meshed with the gear unit (10), the gear unit (10) is meshed with the driving gear (5), a rotating shaft (8) is arranged on the driving gear (5), and at least one first magnetic part (33) is arranged on the turbine (3); and a second magnetic part (51) is arranged on the driving gear (5), the first magnetic part (33) is a magnetic induction switch, and the secondmagnetic part (51) is a magnetic induction switch. The intelligent lock has the advantages of detecting and locking through the magnetic induction switch and saving electricity.
Owner:浙江伟杰电子科技有限公司
Water heater and its control method
Owner:QINGDAO HAIER SMART TECH R & D CO LTD
A Coordinated Control Method for Hybrid Microgrid System Based on Virtual Synchronous Motor
ActiveCN107612050BCoordinated control method is simpleFlexible and reliable controlElectrical apparatusComputer networkMicrogrid
Owner:ZHUHAI POWER SUPPLY BUREAU GUANGDONG POWER GIRD CO
Excavator swing hydraulic control system
ActiveCN106088208BReduce displacementReduce the overall heightSoil-shifting machines/dredgersElectronic control systemControl system
Owner:LIUZHOU LIUGONG EXCAVATORS +2
Vehicle-mounted wireless charging control system and method
InactiveCN113270924AGuaranteed flameoutAccurate judgment basisCircuit monitoring/indicationDifferent batteries chargingIn vehicleControl system
The invention discloses a vehicle-mounted wireless charging control system and method, and relates to the technical field of wireless charging control. The system comprises a first temperature detection module, a second temperature calculation module, a charging control module, a coil, and an alarm module. The first temperature detection module is connected with the input end of the second temperature calculation module; the second temperature calculation module is connected with the input end of the charging control module; the charging control module is used for controlling the charging process; the coil is connected with the first output end of the charging control module; and the alarm module is connected with the second output end of the charging control module. According to the invention, theoretical dynamic calculation is carried out on the inside and outside temperature difference, the accurate temperature outside a vehicle-mounted wireless charging controller shell is obtained, and a more accurate judgment basis is provided for the reliable wireless charging process control; a battery is adopted as a driving backup energy source, so that it is guaranteed that a charging clamp can still work when a vehicle flames out; the wireless charging process is flexibly and reliably controlled, and the safety and reliability of the whole system are improved.
Owner:深圳市智高翔科技发展有限公司
Lock and speed reducer thereof
InactiveCN111119593AReasonable structureFlexible and reliable controlNon-mechanical controlsEngineeringBevel gear
The invention relates to the field of locks, and discloses a lock and a speed reducer thereof. The speed reducer comprises a shell (4), a motor (1) and a bevel gear (2), wherein the shell (4) is connected with the motor (1), the shell (4) is provided with a lug (41), the lug (41) is provided with a screw hole (42), and the motor (1) is provided with the bevel gear (2); and the speed reducer further comprises a first gear component (3), a gear set, a driving gear (5) and a rotating shaft (8), wherein the bevel gear (2) is meshed with the first gear component (3), the first gear component (3) ismeshed with the gear set, the gear set is meshed with the driving gear (5), the rotating shaft (8) is arranged on the driving gear (5), and at least one first magnetic part (33) is arranged on the first gear component (3). The lock has the advantages that unlocking and locking of the intelligent lock are controlled through electric pulse detection, and false locking is prevented.
Owner:浙江伟杰电子科技有限公司
A long-stroke liquid-controlled natural gas compressor
InactiveCN104595155BExtended service lifeSlow downPumpsPositive-displacement liquid enginesGas cylinderPiston ring
The invention relates to a long-stroke hydraulically-controlled compressor in natural gas industry. The invention adopts the technical scheme as follows: a primary gas inlet valve and a secondary gas inlet valve are mounted at the upper parts of two ends of a gas cylinder, wherein a primary gas outlet valve and a secondary gas outlet valve are mounted on the lower parts of two ends of the gas cylinder; a gas inlet pipeline is connected to the primary gas inlet valve; the primary gas outlet valve, a heat exchanger, a reversing valve and the secondary gas inlet valve are connected in series through a pipeline; the bottom of the gas cylinder is in flange connection with a piston ring; a head of the cylinder is in threaded connection with an end cover; one end of an oil cylinder sleeve is in threaded connection with the piston ring; the other end of the oil cylinder sleeve is in clearance fit with the end cover; one end of a piston rod is placed in an inner cavity of the oil cylinder in a clearance fit manner; a lug ring on one end of the piston ring is hinged to a rack; the gas cylinder is fixedly connected to the rack. The long-stroke hydraulically-controlled compressor is long in stroke; the liquid compact can be avoided; a moving part is low in speed, low in noise and long in service life; the compressor is wholly prized; a hydraulic control manner is adopted, so that the compressor is flexible and reliable to control; the compressor can be applied to processes of discharging water and extracting gas, mixing and conveying gas and liquid and recycling scattered gas; the compressor is highly adaptive to variable working conditions.
Owner:CHENGDU TINGYUAN TECH
Cleaning device and method for cleaning workpieces
Owner:DUERR ECOCLEAN GMBH
A self-driving drive circuit for a dual-transistor forward synchronous rectification circuit
ActiveCN109347311BImprove efficiencyThe process is easy to realizeEfficient power electronics conversionAc-dc conversionDouble tubeControl engineering
The invention discloses a self-driving drive circuit of a double-tube forward synchronous rectification circuit. The double-tube forward synchronous rectification circuit includes a transformer, a double-tube forward network on the primary side of the transformer, and a synchronous rectification transformation network on the secondary side of the transformer. The transformer includes the first primary winding, the first secondary winding and the second secondary winding; the self-driving drive circuit of the double-tube forward synchronous rectification circuit is used to drive the freewheeling tube in the synchronous rectification transformation network, by controlling the self-driving Drive the working state of the first P-type MOS tube in the driving circuit to drive the rectifier tube in the synchronous rectification conversion network. The driving voltage provides a path for the output inductor of the subsequent stage, which can improve the efficiency of the converter. At the same time, the driving voltage of the freewheeling tube can be adjusted to make the control more flexible and reliable.
Owner:MORNSUN GUANGZHOU SCI & TECH
Non-blocking electric spark pulse power supply and its processing and gap discharge state identification method
The invention discloses a resistance-free medium wire feed pulsed power source and a processing method and gap discharge state recognition state thereof. A circuit comprises a power loop, a drive circuit, an FPGA controller, a voltage detection circuit and a current detection circuit. When a first switch pipe is turned on to the maximum wait breakdown time threshold value, the gap voltage in the time frame is detected, the average voltage is calculated, and of the average voltage is a floating voltage, a gap is recognized in an idling state; otherwise, the first switch pipe is turned off, after dead time, when a second switch pipe is turned on, the gap current is detected, changes of the current descending slope are calculated, if the slope change rate exceeds the descending slope change rate threshold value, the gap is recognized as a short circuit, and if the slope hardly changes or changes slightly, the gap is recognized as normal discharge; and according to the recognized gap state, necessary bases are provided for the feed direction and speed of a servo system. The recognition precision of the gap discharge state of the power source is improved, and then the processing efficiency and discharge rate of the power source are improved.
Owner:NANJING UNIV OF SCI & TECH
Automatic picking control method and system of plate products
ActiveCN101811325BFlexible and reliable controlControl devices for conveyorsCeramic shaping apparatusControl engineeringControl cell
Owner:BEIJING NEW BUILDING MATERIALS PLC
Current-equalizing pneumatic heat exchanging bed
ActiveCN101629717BFlexible and reliable controlNo mechanical failureFluidized bed combustionApparatus for fluidised bed combustionEngineeringDistributor
Owner:XIAN THERMAL POWER RES INST CO LTD
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