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52results about How to "Guaranteed normal start" patented technology
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Compound starting device and starting method for engine
ActiveCN105604758AQuick responseSimple structureBatteries circuit arrangementsStarters with fluid-driven auxillary enginesHydraulic motorHydraulic pump
The invention discloses a compound starting device and a starting method for an engine. The compound starting device is characterized in that a hydraulic oil tank is connected with an input end of a hand pump, an output end of the hand pump is connected with an energy accumulator and an input end of a starting valve, and a first output end of the starting valve is connected with an input end of a hydraulic starting motor; the first output end of the starting valve is further connected with an input end of a hydraulic pump by a check valve, and the hydraulic pump is connected with the starting motor. A second output end of the starting valve is connected with an input end of a hydraulic motor for driving a charging power generator, and the hydraulic motor for driving the charging power generator is connected with the charging power generator. The starting method includes a starting motor starting mode and a hand pump starting mode. The compound starting device and the starting method have the advantages that the compound starting device is simple in structure and has diversified functions, the starting method is convenient and reliable, accordingly, the hydraulic starting motor can be driven in a hydraulic pump mode or the hand pump mode to rotate, and the engine can be started; the compound starting device has a main starting quick response function, manual operation for emergency purposes is taken into account, and accordingly the engine can be started even in extreme states.
Owner:JIANGSU HAOSAI TECH CO LTD
Keyless starting control system and control method thereof
ActiveCN101648551AGuaranteed reliabilityEnsure starting and driving safetyAnti-theft devicesElectric/fluid circuitDriving safetyEngineering
The invention aims to provide a safe and reliable keyless starting control system and a control method thereof. The control system comprises a starting button, a remote key, a starting controller, anautomobile body controller, an engine controller and an engine theftproof controller, wherein the remote key and the starting controller can be in mutual wireless communication; the automobile body controller, the engine controller and the engine theftproof controller are connected with the starting controller and the starting button is respectively connected with the starting controller and the automobile body controller which is also connected with a position sensor of a braking pedal and a gear box with a locking function. The keyless starting control system and the control method have theadvantages that two verification steps are set before an automobile is started, thereby ensuring the reliability and meanwhile, the braking pedal, the gear information of the gear box and the lockingfunction of the gear box are used for ensuring starting and driving safety.
Owner:CHERY AUTOMOBILE CO LTD
Control method for intelligent power management system of whole vehicle
ActiveCN105818765AReal-time monitoring of power statusReduce after-sale thousand frequencyElectric/fluid circuitEnergy efficient vehicular chargingElectrical batteryEmbedded system
The invention relates to an intelligent power management system. Under the condition that an engine of a whole vehicle is not started, the aging state, the electric quantity state, the voltage state and the current state of a storage battery are recorded in real time through a storage battery sensor and sent to a power management controller, and the states of the storage battery are defined into four types of power management level signals (PMS_level) and low battery electric quantity signals (Low Power Warning) according to an algorithm of the battery management controller; then the four types of the power management level signals and the low battery electric quantity signals are sent to load controllers such as an air conditioner controller, a DVD controller and a lamplight controller through a CAN network; and all the load controllers conduct corresponding load management according to the received level signals, the state of the storage battery is monitored in real time, and therefore a user is reminded of the condition of the electric quantity of the storage battery. By the adoption of the intelligent power management system, power use classified management of loads of the whole vehicle is achieved, and the purposes of reducing the electric quantity consumption of the storage battery and prolonging the service life of the storage battery are achieved.
Owner:CHONGQING CHANGAN AUTOMOBILE CO LTD
Two-dimensional blade profile optimization method for compressor considering low Reynolds number working performance
ActiveCN109779972AImprove aerodynamic performanceIncrease stall marginPump componentsPumpsGenetic algorithmEngineering
The invention relates to a two-dimensional blade profile optimization method for a compressor considering a low Reynolds number working performance; the optimization method is characterized by comprising the following steps of: step 1: analyzing the meridional flow performance of a prototype multistage axial flow compressor at different rotating speeds; step 2: determining a key two-dimensional blade profile section to be optimized; step 3: performing parametric fitting to the key two-dimensional blade profile in step 2; step 4: analyzing the aerodynamic performance of the two-dimensional blade profile, and analyzing the aerodynamic performance of the parameterized two-dimensional blade profile to obtain the variable attack angle performance of the blade profile under a low Reynolds numberworking condition and the variable attack angle performance under a high Reynolds number working condition; and step 5: optimizing the modeling parameters of the two-dimensional blade profile, adjusting the two-dimensional modeling parameters according to the variable attack angle performance parameters of the two-dimensional blade profile obtained in step 4 at different Reynolds numbers, using agenetic algorithm to circularly iterate steps 3 and 4 until a two-dimensional blade profile design reducing loss and increasing stall margin is obtained, and then obtaining a new two-dimensional blade profile. According to the invention, the performance optimization of the two-dimensional blade profile of the axial flow compressor at different Reynolds numbers and different attack angles is realized; the designed working performance of the compressor is improved while the aerodynamic performance of the compressor at the low rotation speed working condition is improved; and the flow efficiencyis improved while the normal starting and stable working of the compressor are ensured.
Owner:HANGZHOU TURBINE POWER GRP
Air brake controlling method electric automobile and controlling system thereof
ActiveCN1792690ARealize intermittent operationSave energyBraking action transmissionWorking pressureControl system
An air brake controlling method and system for electric car is disclosed. An air compressor starting / stopping control system is arranged in the air brake control system for making the air compressor work in preset pressure range. When the air compressor is stopped, the electromagnetic valve and pneumatic direction valve are used to unload the energy supply loop and discharge pollutant, ensuring that the air compressor is started in idle state.
Owner:CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
Steel ladle bottom argon blowing control system and method
PendingCN110387454ARealize highly automated operationAdapt to open-loop controlIncreasing energy efficiencyControl systemMathematical model
The invention discloses a ladle bottom argon blowing control system and a method. The ladle bottom argon blowing control system for an industrial personal computer comprises an industrial personal computer argon blowing control module and an industrial personal computer transmission module, wherein the industrial personal computer argon blowing control module interacts with the industrial personalcomputer transmission module, and the industrial personal computer argon blowing control module comprises an industrial personal computer argon blowing starting module, an information acquisition module, a mathematical model distribution module, an argon blowing mode selection module, a first calculation module and an industrial personal computer argon blowing closing module. The ladle bottom argon blowing system for the industrial personal computer establishes an argon blowing mathematical model for the all-steel type smelting outside a furnace, and different mathematical models can be automatically selected according to different steel types to realize the full-automatic adjustment of argon pressure and flow control in the steel ladle argon blowing process, and meanwhile, two control modes of a remote industrial personal computer control and an on-site terminal control are provided, so that different requirements of technical personnel on a steel ladle bottom argon blowing control are adapted.
Owner:沈阳人和机械制造有限公司
Method and device for controlling idling speed of engine
ActiveCN107630758AImprove the maximum output capacityAvoid stallingElectrical controlMachines/enginesElectricityFlameout
The invention discloses a method and device for controlling the idling speed of an engine. The control method comprises the following steps that the current available electric quantity of a vehicle-mounted storage battery is obtained under the idling condition; according to the current available electric quantity, an adjusting instruction is sent so as to adjust the idling speed of the engine, sothat the idling speed of the engine is matched with the current available electric quantity; and the idling speed is inversely related to the current available electric quantity. According to the scheme of the method and device for controlling the idling speed of the engine, the insufficient electricity situation of the vehicle-mounted storage battery of a vehicle can be avoided, normal starting of the vehicle is guaranteed, and idling shaking or flameout of the engine is avoided.
Owner:SAIC MOTOR
Vehicle starting storage battery
PendingCN107910951AExtended service lifeAvoid frequent replacementBatteries circuit arrangementsPower network operation systems integrationEngineeringVoltage
The present invention discloses a vehicle starting storage battery. The vehicle starting storage battery comprises: a first storage battery having an anode connected with a first post and a cathode connected with a common port; a second storage battery having an anode connected with a second post and a cathode connected with the common port; a diode having an anode connected with the second post and a cathode connected with the first post; a first switch connected between the anode of the first storage battery and the first post / connected between the cathode of the storage battery and the common port; and a controller connected with the anode of the first storage battery and the first switch, wherein the controller controls disconnection of the first switch when it is detected that a voltage value of the first storage battery is smaller than a reserved voltage threshold in a continuous time threshold, and the first storage battery reserves standby electric quantity, and the controllercontrols connection of the switch when standby electric quantity signals are detected, and the first storage battery supplies the standby electric quantity. The vehicle starting storage battery can effectively prolong the service life of the starting power supply, can reduce the cost of the vehicle starting storage battery and has high reliability.
Owner:周伟中
Low-temperature vehicle starting method and device
ActiveCN108215812AGuaranteed normal startIncrease temperatureHybrid vehiclesPropulsion using engine-driven generatorsPower batteryDrive motor
The invention discloses a low-temperature vehicle starting method and device. The method includes the steps: determining starting power when receiving vehicle starting signals; controlling an engine to drive an ISG motor to generate power and controlling the ISG motor to drive a TM driving motor when the electric quantity of a power battery is larger than a preset electric quantity threshold value, power provided by the power battery at current temperature cannot meet the starting requirement of a vehicle and the temperature of the power battery is lower than a preset temperature threshold value. Therefore, vehicle starting can be ensured at the low temperature of the power battery without additionally increasing a power assembly or hardware configuration of the whole vehicle. Moreover, after the vehicle is started, the power battery is slightly charged and discharged, the temperature of the power battery is rapidly improved, so that the power battery directly supplies power for the TMdriving motor in next starting, and the vehicle is started.
Owner:WEICHAI POWER CO LTD
Intelligent control system and control method for fuel oil heating
ActiveCN106150779AImprove starting performanceAvoid the phenomenon of feedingMachines/enginesThermal treatment of fuelTemperature controlElectricity
The invention relates to an intelligent control system for fuel oil heating. The intelligent control system comprises an engine, an engine controller, a main oil tank, an auxiliary oil tank, a fuel oil heating controller and a storage battery. The main oil tank is communicated with the engine through a main oil tank switch valve, the auxiliary oil tank is communicated with the engine through an auxiliary oil tank switch valve, the engine controller is in signal connection with the fuel oil heating controller, and the fuel oil heating controller is electrically connected with an ignition switch, the main and auxiliary oil tank switch valves, a relay coil, a fuel oil heating switch and a temperature controlled switch; the positive pole of the storage battery is grounded through a battery main switch, a relay contact and a main oil tank heater in sequence, and the negative pole of the storage battery is grounded; when the temperature of an oil sucking opening of the main oil tank is lower than 5 DEG C, an oil way is switched to an auxiliary oil tank loop so as to start the engine, when the rotating speed of the engine reaches 700 rpm, the main oil tank heater starts to heat, when the temperature of the oil sucking opening of the main oil tank reaches 25 DEG C, heating is stopped, and the oil way is switched to a main oil tank loop. By means of the intelligent control system, the starting performance of the engine is improved, and the safety and the reliability are high.
Owner:DONGFENG COMML VEHICLE CO LTD
Stepping motor for generating vibration
InactiveCN101061625ALarge starting torqueGuaranteed normal startSynchronous machinesDynamo-electric converter controlDetentEngineering
A stepping motor for generating vibration in which the stopping position can be securely held by increasing a detent torque. The pole teeth of one stator yoke of a set of one-phase stator yokes are formed in two types of pole teeth with different outermost face areas in the radial direction and the pole teeth of the other are formed in two types of pole teeth with different outermost face areas in the radial direction. One type of pole teeth of these stator yokes are formed in the same shape and the remaining two types of pole teeth which are not formed in the same shape are combined with each other and disposed so that the detent torque can be increased.
Owner:MINEBEA MOTOR MFG
Charging method and control apparatus for lead storage battery suitable for electric vehicle
ActiveCN106374570AAvoid thermal runawayPrevent bulging deformationCharging stationsSecondary cells charging/dischargingTime rangeInternal resistance
The invention discloses a charging method and a control apparatus for a lead storage battery suitable for an electric vehicle, and belongs to the field of the electric vehicle. The control apparatus comprises a central control unit, a photoelectric coupler, a voltage detection unit and a battery internal resistance detection unit, wherein the central control unit is provided with pins of Vin end, JS end, CR end, T end and K1 end, K2 end and K3 end; the Vin end is used for receiving a voltage signal corresponding to a battery end voltage from the output end of the voltage detection unit; the K1 end, the K2 end and the K3 end are output ends of the central control unit; the primary PWM-IC working state of a charger is controlled through the photoelectric coupler; the JS end is a timing triggering end of the central control unit for timing charging periods; and the CR end is used for receiving a battery internal resistance state signal from the battery internal resistance detection unit. According to the charging method and the control apparatus, a low-frequency pulse charging mode limited by a time range is adopted, so that a common industrial phenomenon of early degradation of the capacity service life caused by a single backward failure in cyclic use of a 36-72v battery pack can be effectively solved; and instead, one-time balance charging saturation for the battery pack can be realized, and the charger can be turned off.
Owner:任红雷
A fuel heating intelligent control system and its control method
ActiveCN106150779BImprove starting performanceAvoid the phenomenon of feedingMachines/enginesThermal treatment of fuelElectricityTemperature control
The invention relates to an intelligent control system for fuel oil heating. The intelligent control system comprises an engine, an engine controller, a main oil tank, an auxiliary oil tank, a fuel oil heating controller and a storage battery. The main oil tank is communicated with the engine through a main oil tank switch valve, the auxiliary oil tank is communicated with the engine through an auxiliary oil tank switch valve, the engine controller is in signal connection with the fuel oil heating controller, and the fuel oil heating controller is electrically connected with an ignition switch, the main and auxiliary oil tank switch valves, a relay coil, a fuel oil heating switch and a temperature controlled switch; the positive pole of the storage battery is grounded through a battery main switch, a relay contact and a main oil tank heater in sequence, and the negative pole of the storage battery is grounded; when the temperature of an oil sucking opening of the main oil tank is lower than 5 DEG C, an oil way is switched to an auxiliary oil tank loop so as to start the engine, when the rotating speed of the engine reaches 700 rpm, the main oil tank heater starts to heat, when the temperature of the oil sucking opening of the main oil tank reaches 25 DEG C, heating is stopped, and the oil way is switched to a main oil tank loop. By means of the intelligent control system, the starting performance of the engine is improved, and the safety and the reliability are high.
Owner:DONGFENG COMML VEHICLE CO LTD
Electronic thermostat with compressor starting function
ActiveCN102323835ASolve the defect of not having compressor start functionLow costTemperature control using electric meansCapacitanceThermostat
The invention relates to an electronic thermostat with a compressor starting function, which comprises a power circuit [1], a single-chip microcomputer [7], a compressor switch circuit [3], a compressor starting circuit [2], a temperature compensation circuit [4], a temperature regulation and detection circuit [5] and a light-emitting diode (LED) lamp group [6]. In the thermostat, the single-chip microcomputer forms a control system, the power circuit of the thermostat adopts a capacitor to reduce the voltage, then positive and negative half wave respectively handles, wherein a positive half circumference supplies power to the control system which is formed by the single-chip microcomputer [7] after rectification, filtration and voltage stabilization; a negative half circumference supplies power to the LED lamp group [6] for lighting the inside of a refrigerating device after rectification, filtration and voltage stabilization; and two connecting leads are arranged between the compressor starting circuit [2] and a compressor [Cp], wherein one connecting lead is connected with a compressor starting winding [S] and the other connecting lead is connected with a common end [C] of the compressor starting winding [S] and a main winding [M]. The thermostat realizes the functions of a traditional compressor non-power consumption starter on the electronic thermostat with the very simple circuit, the circuit is simple, the cost is low and the scope of application is wide.
Owner:SHANGHAI STAR ELECTRONICS TECH
Controlling device and control method of gas turbine rotating speed
ActiveCN102493876AGuaranteed normal startReact healthGas turbine plantsJet propulsion plantsStaringGas turbines
The invention provides a control device and a control method of gas turbine rotating speed. The control device comprises a velocity measurement motor rotating speed sensor, a phonic wheel velocity measurement sensor and a controller. The control method comprises the following steps: 1. a gas turbine is started; 2. two sensors detect three rotating speed signals and input the rotating speed signals into the controller; 3. a reference rotating speed is set in the controller, and the controller compares the rotating speed signals from the step 2 with the reference rotating speed to obtain a rotating speed of the gas turbine; and 4. the rotating speed of the gas turbine is used as a reference rotating speed of a next cycle, and the gas turbine is adjusted according to the rotating speed of the gas turbine. Reference rotating speed obtained by the control device is basically the same as an actual rotating speed of the gas turbine and can well reflect operating status of the gas turbine. Besides, according to the invention, the rotating speed signal can be transmitted to the controller accurately, so that the controller can accurately adjust and control the gas turbine; thereby, normal staring of the gas turbine can be guaranteed.
Owner:AVIC PST NANFANG GAS TURBINE COMPLETE MFG & INSTALLATION
Diesel engine and method for starting a diesel engine
InactiveCN107110042AEfficient heatingImprove efficiencyElectrical controlInternal combustion piston enginesInlet valveDiesel engine
The invention relates to a diesel engine, in particular a high-power diesel engine, which comprises a variable valve train (13) comprising an adjusting unit (14) for adjusting a valve opening time, a valve lift, a camshaft phase position and / or a valve steering, and a control or regulating unit (16) for controlling the adjusting unit (14). Said control and / or regulating unit (16) comprises at least one operational mode provided for starting the engine when the engine is at a low temperature, in which the control and / or regulating unit (16) is provided to adjust the valve opening time, at least during a preliminary phase for at least one inlet valve (18, 19, 20, 21), which overlaps at least with one compression stroke of an associated cylinder (1, 2, 3, 4), and to interrupt an injection of fuel at least into the cylinder (1, 2, 3, 4) associated with the inlet valve (18, 19, 20, 21). The invention also relates to a method for starting said type of diesel engine.
Owner:MOTOREN UND TURBINEN UNION MUNCHEN GMBH
Plunger water pump integrated application system
InactiveCN109322809ASolve efficiency problemsSolve the problem of small displacement of a single plunger pumpPositive displacement pump componentsPump controlTransfer caseCoupling
The invention discloses a plunger water pump integrated application system. The plunger water pump integrated application system is characterized by comprising a motor, a first coupler, a transfer case, a plurality of plunger water pumps, a water suction pipeline, a water pressing pipeline and a lubricating oil system, wherein the power of the motor is transmitted to an input shaft of the transfercase through the first coupler, the power is transmitted to a plurality of output shafts of the transfer case through an intermediate shaft, each plunger water pump is fixed on one side of the transfer case and is connected with the corresponding output shaft of the transfer case through a second coupler, the water suction pipeline is correspondingly connected with water suction openings of all the plunger water pumps, the water pressing pipeline is correspondingly connected with water pressing openings of all the plunger water pumps, and the lubricating oil system provides lubricating oil for each plunger water pump. According to the plunger water pump integrated application system, a perfect lubricating system and a concise water suction and water pressing pipeline system are adopted astechnical support, so that the high-pressure plunger pumps can run reliably for a long time, and the problems of low efficiency of a centrifugal pump under a high lift and small displacement of a single plunger water pump are well solved.
Owner:WUHAN UNIV OF TECH
Electromagnetic switch protective structure and mounting method thereof
InactiveCN103426685AIncreasing the thicknessSmall amount of compressionElectromagnetic relay detailsMechanical engineering
Owner:芜湖杰诺瑞汽车电器系统有限公司
A control method for a vehicle intelligent power management system
ActiveCN105818765BReal-time monitoring of power statusReduce after-sale thousand frequencyElectric/fluid circuitEnergy efficient vehicular chargingEmbedded systemLoad management
The invention relates to an intelligent power management system. Under the condition that an engine of a whole vehicle is not started, the aging state, the electric quantity state, the voltage state and the current state of a storage battery are recorded in real time through a storage battery sensor and sent to a power management controller, and the states of the storage battery are defined into four types of power management level signals (PMS_level) and low battery electric quantity signals (Low Power Warning) according to an algorithm of the battery management controller; then the four types of the power management level signals and the low battery electric quantity signals are sent to load controllers such as an air conditioner controller, a DVD controller and a lamplight controller through a CAN network; and all the load controllers conduct corresponding load management according to the received level signals, the state of the storage battery is monitored in real time, and therefore a user is reminded of the condition of the electric quantity of the storage battery. By the adoption of the intelligent power management system, power use classified management of loads of the whole vehicle is achieved, and the purposes of reducing the electric quantity consumption of the storage battery and prolonging the service life of the storage battery are achieved.
Owner:CHONGQING CHANGAN AUTOMOBILE CO LTD
Position controlling method, position controlling device and electric tool containing the device
InactiveCN101038494AGuaranteed real-timeGuaranteed precisionDynamo-electric converter controlModelling/simulations for controlGeneral purposeLoop control
A position control method, position control device and electric tool with this position control device, the position control device has the general-purpose motor (13), actuating unit (20), which connected with the general-purpose motor (13) to fulfill the position switching, a pulse generator (10), for generating the variable pulse signals; processing (11) unit, for continuous collecting and processing the pulse signals and generating the relevant pulse width modulation signals; circuit (12) for connecting the processing unit and general-purpose motor, which output the pulse width modulation signal to the general-purpose motor (13), which receive and fulfill the pulse width modulation signal to drive the actuating unit (20) and fulfill the position switching, this position control device may realize the precision open-loop control of position switching in real-time.
Owner:POSITEC POWER TOOLS (SUZHOU) CO LTD
Method for managing the operation of a starter of a heat engine in order to prevent possible overheating at startup
ActiveCN106103973AGuaranteed normal startElectric motor controlInternal combustion piston enginesTime segmentThermal coefficient
A method for managing the operation of a starter configured to start a heat engine comprising: a step of determining a first temperature value; a step of determining thermal coefficients corresponding to the first temperature value of a pre-established thermal model describing the development over time of the temperature at said point of the starter; a step of calculating the time remaining for the temperature at a point of the starter to reach a second temperature value higher than the first temperature value, on the basis of the pre-established thermal model; and a step of inhibiting the starter, at least for a predefined period of time, when said remaining time is less than a predefined period of time.
Owner:PEZHO SITROEN AUTOMOBILS SA
Refrigeration device and refrigerating machine therefor
InactiveCN102741625APositive temperature coefficient resistance characteristicsNo power lossMechanical apparatusDomestic refrigeratorsElectricityEvaporator
The invention relates to a refrigeration device for a combination refrigerating appliance such as a household refrigerator-freezer combination, comprising a condenser (8) and at least two evaporators (3, 4) which are connected in parallel circuitry to an electrically controlled, multistable selector valve (7) and can be selectively supplied with coolant via the selector valve (7). According to the invention, a series circuit of a first current-controlled switch (18; 19) having PTC resistor characteristics and of the selector valve (7) is connected electrically parallel to the condenser (8).
Owner:BSH BOSCH & SIEMENS HAUSGERAETE GMBH
Vehicle and heating method and device for battery pack of vehicle
PendingCN112670620AGuaranteed normal startCan not operateSecondary cellsMicrocontrollerElectric machinery
The invention discloses a vehicle and a heating method and device for a battery pack of the vehicle. The heating method comprises the following steps: obtaining the temperature of a battery pack after a vehicle is started, and carrying out the judgment; if the temperature of the battery pack is lower than a preset temperature, generating a heating instruction; and sending the heating instruction to a microcontroller, so that the microcontroller outputs current to the motor of the vehicle according to the heating instruction, a motor rotor is kept static, and a motor winding emits heat so as to heat the battery pack. According to the method, heating of the battery can be achieved through heat generated by the motor before the vehicle is started, the situation that the battery pack cannot run due to the too low temperature is avoided, normal starting of the vehicle is guaranteed, other components are not needed, and cost is low.
Owner:GREAT WALL MOTOR CO LTD
Intelligent soft starting device
The invention relates to an intelligent soft starting device, which comprises a step-down transformer, an on-load tap-changer, a step-down control cabinet, a reactive power control cabinet, a reactive power generator and a control unit, the high-voltage side of the step-down transformer is connected with a starting cabinet, the neutral point of the high-voltage side of the step-down transformer is provided with the on-load tap-changer, and the on-load tap-changer is connected into a star shape through the step-down control cabinet; the high-voltage end of the reactive generator is connected with the low-voltage side of the step-down transformer through the reactive control cabinet, and the low-voltage ends of the reactive generator are connected into a star shape; a data table is stored in the control unit, the data table comprises key data corresponding to each rotating speed point of the motor, and the control unit is used for collecting data of the motor and data of a power grid, comparing the data with the data table and then outputting a control signal; and the on-load tap-changer is used for adjusting the number of turns of windings at the high-voltage end of the step-down transformer according to the control signal.
Owner:BIG PAWER ELECTRICAL TECH XIANGYANG
A Two-Dimensional Compressor Airfoil Optimization Method Considering the Performance of Low Reynolds Number Conditions
ActiveCN109779972BImprove aerodynamic performanceIncrease stall marginGeometric CADPump componentsClassical mechanicsMechanical engineering
The invention relates to a two-dimensional blade profile optimization method for a compressor considering a low Reynolds number working performance; the optimization method is characterized by comprising the following steps of: step 1: analyzing the meridional flow performance of a prototype multistage axial flow compressor at different rotating speeds; step 2: determining a key two-dimensional blade profile section to be optimized; step 3: performing parametric fitting to the key two-dimensional blade profile in step 2; step 4: analyzing the aerodynamic performance of the two-dimensional blade profile, and analyzing the aerodynamic performance of the parameterized two-dimensional blade profile to obtain the variable attack angle performance of the blade profile under a low Reynolds numberworking condition and the variable attack angle performance under a high Reynolds number working condition; and step 5: optimizing the modeling parameters of the two-dimensional blade profile, adjusting the two-dimensional modeling parameters according to the variable attack angle performance parameters of the two-dimensional blade profile obtained in step 4 at different Reynolds numbers, using agenetic algorithm to circularly iterate steps 3 and 4 until a two-dimensional blade profile design reducing loss and increasing stall margin is obtained, and then obtaining a new two-dimensional blade profile. According to the invention, the performance optimization of the two-dimensional blade profile of the axial flow compressor at different Reynolds numbers and different attack angles is realized; the designed working performance of the compressor is improved while the aerodynamic performance of the compressor at the low rotation speed working condition is improved; and the flow efficiencyis improved while the normal starting and stable working of the compressor are ensured.
Owner:HANGZHOU TURBINE POWER GRP
Anti-backward sliding device for car hill starting
PendingCN106828447AGuaranteed normal startBack slipBraking element arrangementsAutomotive transmissionBevel gear
The invention relates to an anti-backward sliding device for car hill starting, and belongs to the technical field of vehicle braking. The device comprises a first spiral bevel gear, a second bevel gear, a one-way bearing, a spline, a reset spring, a shifting fork and a hydraulic device. An automobile gearbox is improved, in this way, an automobile can park on a hill without any anti-backward sliding operation, and normal starting of the automobile can be guaranteed. The anti-backward sliding device can prevent backward sliding during hill starting of the automobile, avoids collision accidents with vehicles behind the automobile and improves the stability and safety during hill starting of the automobile.
Owner:EAST CHINA JIAOTONG UNIVERSITY
High-voltage winding type motor brush lifting control system and method
ActiveCN105207533AOvercoming the ills of continuous frictionGuaranteed normal startStarter detailsPolyphase induction motor starterElectric machineControl system
The invention discloses a high-voltage winding type motor brush lifting control system and method. The system comprises a first servo motor, a second servo motor, a collecting ring short-circuit switch, a first proximity switch, a second proximity switch, a third proximity switch, a fourth proximity switch, a first relay and a second relay. The first servo motor is connected with a carbon brush lifting and dropping part. The second servo motor is connected with the collecting ring short-circuit switch. The first servo motor is connected with a power source by means of a first contactor and a second contactor. The second servo motor is connected with the power source through a third contactor and a fourth contactor. The second relay and the first proximity switch are connected into a coil loop of the first contactor in series. The fourth proximity switch and the second proximity switch are connected into a coil loop of the second contactor in series. The first proximity switch and the third proximity switch are connected into a coil loop of the third contactor in series. The first relay and the fourth proximity switch are connected into a coil loop of the fourth contactor in series. According to the system, the motors are automatically connected with a collecting ring in a short mode after being started, the carbon brush is lifted, and the defect of continuous friction between the collecting ring and the carbon brush in the operating process is overcome.
Owner:CHINA RESOURCES CEMENT TECH RES DEV
A Symmetrical Variable Structure Supersonic Inlet Regulator
ActiveCN105971735BGuaranteed normal startGuaranteed to workGas turbine plantsJet propulsion plantsCombustion chamberEngineering
The invention discloses a regulation device with a symmetric type variable structure for a supersonic inlet. The regulation device comprises a front body compression plate, a throat upper panel, a combustion chamber upper panel, regulation devices and sliding mechanisms, wherein the front body compression plate and the combustion chamber upper panel are connected with the throat upper panel through the sliding mechanisms and the regulation devices; the regulation devices are symmetrically fixed to the throat upper panel; and a plurality of sliding mechanisms are symmetrically installed on the front body compression plate and the combustion chamber upper panel respectively. According to the regulation device, through the regulation devices, the size of a compression angle of an inlet duct and the height of a throat are changed, the quality and the air flow of an airflow which enters a combustion chamber, and the inlet duct is in a better working state; when the inlet duct works at a low Mach number, the compression angle of the front body compression plate is reduced, and meanwhile, the height of the throat is increased so as to change the starting performance of the inlet duct and improve the performance of an engine; and along with increase of the Mach number, the compression angle is increased, the height of the throat is also reduced, the internal contraction ratio is increased, the static pressure at the outlet of the inlet duct is strengthened, and the overall performance of an aircraft is improved.
Owner:NORTHWESTERN POLYTECHNICAL UNIV
A method for breaking and threading a belt
ActiveCN104492816BAvoid drivingThickness fluctuation is smallMetal rolling arrangementsStrip steelRolling mill
The invention discloses a method for cutting off and threading of strip steel, and belongs to the technical field of strip steel rolling in coupled pickling and tandem rolling. The method comprises the following steps: choosing strip steel to be halted, reducing a shunt winding cutting speed of the strip steel during shunt winding and cutting; shutting down a rolling mill after shunt cutting and shunting rolling at an outlet, reeling the cut strip steel and unreeling by using a reeling machine and lifting rolling gaps of all racks; choosing a current rack required for overhauling, withdrawing the strip steel by back running and stacking the strip steel to the front side of the current rack, and overhauling the current rack; threading the strip steel of the current rack into the current rack after the overhauling is completed, inching the current rack to thread forwards to ensure that the strip steel of the current rack returns to the position before the back running; tensioning the strip steel by using a pinch roll, pressing down the rolling gaps of all racks, and starting and rolling. According to the method, the rolling mill is started by using normal rolling strip steel instead of thick strip steel, the thickness fluctuation of the rolled steel coil is small and the thickness fluctuation part is positioned at the head of the strip steel, so that rolling wastes are reduced, and the finished product rate is increased.
Owner:BEIJING SHOUGANG COLD ROLLED SHEET
An Electronic Thermostat with Compressor Starting Function
ActiveCN102323835BSolve the defect of not having compressor start functionLow costTemperature control using electric meansMicrocontrollerCapacitance
An electronic thermostat with a compressor starting function, which consists of a power supply circuit [1], a single chip microcomputer [7], a compressor switch circuit [3], a compressor starting circuit [2], a temperature compensation circuit [4], a temperature adjustment circuit It is composed of detection circuit [5] and LED light group [6]. The thermostat consists of a single-chip microcomputer to form a control system. Its power supply circuit adopts capacitor step-down, and then the positive and negative half-waves are processed separately. After being rectified, filtered and stabilized, it provides power to the LED lamp group [6] used for internal lighting of the refrigeration appliance; there are two connecting wires between the compressor starting circuit [2] and the compressor [Cp], one of which is connected to the compressor starting winding [ S] connection, and the other is connected with the common end [C] of the starting winding [S] and the main winding [M] of the compressor. The thermostat uses a very simple circuit to realize the function of a traditional compressor without power consumption starter on the electronic thermostat. The circuit is simple, the cost is low, and the application range is wide.
Owner:SHANGHAI STAR ELECTRONICS TECH
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