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68results about How to "Avoid surge phenomenon" patented technology
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Air compressor group control system and method capable of achieving calculation based on required air consumption
ActiveCN106150996AGuaranteed uptimeIncrease operating loadPump testingPump controlControl systemEngineering
The invention discloses an air compressor group control system and method capable of achieving calculation based on the required air consumption, and relates to the technical field of air compressor group control. The system comprises air compressor units, an air distributing cylinder and a controller; an air compressor air outlet of each air compressor unit is connected with a flowmeter, and the flowmeters are used for collecting the air supply flow of an air compressor, the air distributing cylinder is provided with a pressure sensor, and the pressure sensor is used for collecting air supply pressure of the air distributing cylinder; the controller receives the air supply flow collected by the flowmeter of each air compressor unit and air supply pressure collected with the pressure sensor, the received air supply flow and the received air supply pressure are subject to data processing, and according to the processing result, running of air compressors of an air compressor group is adjusted; the method is a calculation method of the controller; the control system and method promote stable and efficient running of the air compressor, and the running and maintaining cost of an air compressor group are reduced.
Owner:SHENZHEN XINHUANNENG TECH
Device and method for widening stable operation area of centrifugal compressor and centrifugal compressor
ActiveCN102297149AExtended working range of stabilityImprove mobilityPump componentsPump controlSignal conditioningControl engineering
The invention discloses a device for widening a stable operation area of a centrifugal compressor. The device comprises a plurality of high frequency response dynamic pressure sensors, a high frequency response dynamic strain indicator, signal conditioning equipment, a signal processing digital signal processor (DSP) module, and an air jet device, wherein the dynamic pressure sensors and the dynamic strain indicator acquire dynamic signals of the compressor during operation; the signal conditioning equipment transmits the signals to the DSP module; and the DSP module processes the signals and sends a command to a controller so as to make the air jet device act. The device can widen the stable operation area of the centrifugal compressor, namely a stability working range, and eliminates or reduces the harm of flow instability, namely stall and surge. The invention also discloses a method for widening the stable operation area of the centrifugal compressor, and a centrifugal compressor provided with the device for widening the stable operation area of the centrifugal compressor.
Owner:上海和兰透平动力技术有限公司
Air compressor air inflow control system and control method thereof
ActiveCN107035671AAvoid heavy startup loadsPrevent crashPump controlPositive-displacement liquid enginesAxial compressorStaring
The invention relates to an air compressor air inflow control system and a control method thereof. The air compressor air inflow control system comprises an air inflow valve, a stopping air release valve, a circulation unloading valve, a pressure adjusting valve, a loading / unloading solenoid valve, a high / low pressure switching solenoid valve, a one-way valve, an adjustable throttling valve, a filter and a throttle valve. According to the air inlet control scheme, underloading staring of an air compressor can be achieved, low-pressure internal circulation of the air compressor system in the unloading state is maintained, two-gear system working pressure is achieved, starting difficulties of the air compressor can be overcome through the functions, energy-saving operation of the air compressor in the unloading state is guaranteed, and the high / low pressure working pressure of the system can be set according to operation requirements of clients.
Owner:SUNWARD INTELLIGENT EQUIP CO LTD
Anti-surge system of centrifugal type refrigerating unit
ActiveCN104567054AReduce system pressure dropAvoid noiseMechanical apparatusCompression machines with non-reversible cycleRefrigerantSystem pressure
The invention relates to the field of an anti-surge structure, discloses an anti-surge system of a centrifugal type refrigerating unit, the anti-surge system of the centrifugal type refrigerating unit is characterized in that a compressor and a throttling device are respectively connected between a condenser and an evaporator, a boost branch for reducing the pressure difference between the condenser and the evaporator is arranged between the throttling device and a frozen water inlet; the boost branch contains a heat exchange device, the heat exchange device has a refrigerant passage and a water passage, the refrigerant passage is in communication with the condenser and the throttling device, the water passage is in communication with the frozen water inlet and the evaporator, and the water entering from the frozen water inlet in the heat exchange device exchanges heat with the refrigerant out of the condenser. The boost branch is arranged for reducing the pressure difference between the condenser and the evaporator and the heat exchange device is arranged in the boost branch, so that the system pressure difference between the condenser and the evaporator is effectively reduced, and the problem that the noise is generated when a hot gas bypass valve is open in the prior art is avoided.
Owner:GREE ELECTRIC APPLIANCES INC
Fuel cell and air supply system thereof
PendingCN111224130AImprove air flowAvoid surge phenomenonPropulsion by batteries/cellsElectric vehicle charging technologyFuel cellsElectrical battery
The invention relates to the technical field of automobile accessories, and discloses an air supply system and a fuel cell comprising the same. The air supply system comprises an air compressor assembly, a pressurized air supply main path and a bypass branch; an air inlet of the air compressor assembly is communicated with the external environment, and an air outlet of the air compressor assemblyis communicated with a cathode air inlet of a cell reactor of the fuel cell through the pressurized air supply main path; the first end of the bypass branch is communicated with the pressurized air supply main path, and the second end of the bypass branch is communicated with an air inlet of the air compressor assembly; the bypass branch is provided with a bypass control valve capable of controlling air to flow from the first end of the bypass branch to the second end of the bypass branch in a one-way mode. The invention has the beneficial effect that the surge phenomenon of the air compressorassembly under the idling working condition of the fuel cell can be effectively avoided.
Owner:GUANGZHOU AUTOMOBILE GROUP CO LTD
A generalized predictive control system and method for air compressor anti-surge
InactiveCN102297120AAvoid surge phenomenonRegulation stabilityPump testingPump controlChemical industryAxial compressor
An air compressor anti-surge generalized predictive control system and method relate to the field of anti-surge predictive control of air compressor control systems in the steel and chemical industries. The system includes a forward collector, a predictor and a backward actuator. The forward collector monitors the inlet and outlet pressure and flow of the pipe network, and is connected to the predictor in the form of PCI bus; the backward actuator controls the vent valve, has the function of sound and light alarm, and is connected to the predictor in the form of RS485; the predictor The controller adopts the air compressor anti-surge generalized predictive control method, combines the production load setting information input by the keyboard and the on-site operation data obtained by the forward collector, calculates, displays and stores the air compressor operating parameters, and uses the RS485 method to backward The actuator outputs predictive control information to realize predictive control of air compressor anti-surge. The system adjustment process of the invention is gentle, the control precision and dynamic quality are high, the operation is stable and reliable, and the surge phenomenon of the air compressor can be effectively prevented.
Owner:CHANGCHUN UNIV OF TECH
Axial flow fan
The invention provides an axial flow fan which comprises a hub and wing pieces. A pressure face wall thickness reinforcing portion is arranged on one side of a pressure face of the front edge of each wing piece and protrudes out of the pressure face of each wing piece. A corner is arranged close to a wing tip of the front edge of each wing piece. The axial flow fan has the main advantages that the thickness reinforcing portion is arranged on each wing piece, interference and turbulent flow are reduced and noise is further reduced; the wing tips are in a forward inclined design, so a surge phenomenon is avoided; and an expansion portion is arranged on the rear edge of each wing piece, and the pressure at the expansion portion is increased.
Owner:GREE ELECTRIC APPLIANCES INC
Modified compressor air pumping casing
ActiveCN108518355AIncrease resistanceMigration DifficultyTurbine/propulsion engine ignitionTurbine/propulsion engine startersAir pumpEngineering
The invention provides a modified compressor air pumping casing. The modified compressor air pumping casing comprises a compressor casing body and an air pumping casing body; the air pumping casing body sleeves the compressor casing body; a casing channel is formed in the circumferential direction of the side wall of the compressor casing body and penetrates through the side wall of the compressorcasing body; the compressor casing body communicates with the air pumping casing body through the casing channel; and the casing channel is shaped like a complex linear periodic repeatedly-composed circumferential curve. According to the modified compressor air pumping casing, the shape of a traditional circumferential symmetric air pumping casing body is changed into the complex linear periodicrepeatedly-composed circumferential curve from a circumferential straight line surrounding the outer wall of the compressor casing body, so that the on-way resistance of migration of air mass in the circumferential direction of an air pumping channel can be increased, the obstruction effect on the low-pressure separated air mass pumped away from a compressor passage due to the migration of the high-pressure airflow in the circumferential direction of an air pumping channel seam can be weakened, the flow separation can be relieved more easily, the surge phenomenon caused by the intensified rotating stall of gas in the compressor casing body can be effectively avoided, and a gas turbine can be started more stably and safely.
Owner:TSINGHUA UNIV
Turbocharging method and device, supercharging control equipment and storage medium
InactiveCN110159418AAvoid failureAvoid surge phenomenonInternal combustion piston enginesGas turbine plantsTurbochargerEngineering
The invention relates to the technical field of turbocharging, and discloses a turbocharging method and device, supercharging control equipment and a storage medium. The turbocharging method comprisesthe steps that the current pressure and current temperature of a pre-arranged intake manifold are collected; the current air intake is determined according to the current pressure and the current temperature; the current air intake is compared with preset surging flow; and when the current air intake is larger than the preset surging flow, an opening degree adjusting instruction is generated, thecurrent opening degree of a pre-arranged waste gas bypass valve is adjusted to a first preset opening degree according to the opening degree adjusting instruction for surging preventing adjustment ofturbocharging. Obviously, use of a boost pressure control valve is omitted, the opening degree of the pre-arranged waste gas bypass valve is controlled through the comparison result obtained by comparing the current air intake and the preset surging flow to protect a turbocharger, and it can be avoided that the turbocharger fails after fiercely surging; and therefore the technical problem that surging preventing control over the turbocharger cannot be efficiently carried out is solved.
Owner:ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
Method for preventing surging of fans
ActiveCN104265666AAvoid surge phenomenonExtended service lifePump controlPump installationsComputer control systemPower flow
The invention discloses a method for preventing surging of fans. The method for preventing surging of the fans comprises the following steps of arranging an outlet adjusting valve and a pressure detecting device on an outlet of each combustion fan; acquiring starting signals of each combustion fan, furnace inside combustion marks, running current detection signals, outlet pressure detection signals and opening feedback signals of the outlet adjusting valves; acquiring pressure detection signals of an air main tube; and transmitting the signals to a computer control system and calculating and analyzing the signals. When the current value of the combustion fans are lower than a normal working current range, the adjusting valves on the outlets of the combustion fans are adjusted according to the current value, the opening of the valves is adjusted, air supply load is increased, and the pressure of the outlets of the combustion fans is greater than or equal to the pressure on the air main tube. By the method, surging of the fans can be effectively avoided, so that the fans are protected, and the service lives of the fans are prolonged.
Owner:WUHAN IRON & STEEL ENG TECH GROUP
Centrifugal compressor system and compressor head control method thereof
ActiveCN112728798AReduced surge frequencyReduce suction and exhaust pressure differenceMechanical apparatusCompression machines with cascade operationControl theoryCentrifugal compressor
The invention discloses a centrifugal compressor system and a compressor head control method thereof. When a first compressor is started and operates to meet the compressor head condition, whether the compressor head anti-surge condition is met or not is judged firstly, when the anti-surge condition is not met, the opening degree of a first-stage throttling valve and the opening degree of a second-stage throttling valve are actively adjusted, the refrigerant liquid level height of a condenser is reduced, the refrigerant amount between the condenser and an evaporator is balanced, and therefore the suction and exhaust pressure difference of the compressor is reduced, the surge frequency of the compressor is reduced, the actual operation frequency in the compressor head process is higher than the surge frequency, the surge phenomenon in the compressor head process is avoided, the first compressor normally operates in the compressor head period, the operation efficiency of the system is not affected, and the problem that noise is generated due to opening of a hot air bypass pipeline is solved.
Owner:QINGDAO HISENSE HITACHI AIR CONDITIONING SYST
Air blower variable-frequency control device based on power frequency motor and control method for air blower variable-frequency control device
ActiveCN105465029AAvoid surge phenomenonSimple structurePump controlNon-positive displacement fluid enginesFrequency changerAir volume
The invention relates to an air blower variable-frequency control device based on a power frequency motor and a control method for the air blower variable-frequency control device. The air blower variable-frequency control device comprises the power frequency motor, a frequency converter, a controller and a communication assembly, wherein the frequency converter and the power frequency motor are connected by virtue of an electric wire, and the controller is in control connection with the frequency converter by virtue of the communication assembly; the controller comprises a storage unit, a comparison unit, an alarm unit, a PLC (programmable logic controller) control unit and a detecting unit; an electric reactor is further arranged between the frequency converter and the power frequency motor; the detecting unit is connected to the power frequency motor, and is used for feeding back a detected actually-measured frequency value and an actually-measured current value of the power frequency motor, and an outlet total air flow value of the air blower to the comparison unit. The air blower variable-frequency control device has the advantages of being simple in structure, reasonable in design, high in degree of automation, and capable of effectively reducing a calorific value of a frequency converter motor to achieve the purpose of automatically regulating to realize energy saving; and by reasonably controlling and regulating the frequency of the frequency converter, and the occurrence of a surging phenomenon of the air blower due to energy waste or too low frequency caused by too high frequency is avoided.
Owner:XIAOHONGMEN SEWAGE TREATMENT PLANT BEIJING DRAINAGE GRP
Fuel cell air circuit, pumping device control method and controller
The invention provides a fuel cell air circuit. The fuel cell air circuit comprises a fuel cell stack, an air compressor arranged on the intake pipe of the fuel cell stack, and a pumping device whichis arranged on the exhaust pipe of the fuel cell stack. The pumping device is used for extracting gas in the fuel cell stack. According to the invention, the pumping device is arranged on the exhaustpipe of the fuel cell stack; when the air compressor has a surge phenomenon, unreacted gas in the fuel cell stack can be discharged in time by turning on the pumping device; gas flow resistance and pressure drop in the fuel cell stack are reduced; the surge of the air compressor is prevented; normal operation of a fuel cell engine is ensured; and the impact of surge on the service life of the aircompressor is reduced. The embodiment of the invention further discloses a pumping device control method and a controller.
Owner:WEICHAI POWER CO LTD
Fan rotating speed control method, device and computer readable storage medium
InactiveCN108954653AAvoid surge phenomenonAvoid noiseMechanical apparatusSpace heating and ventilation safety systemsInlet pressureDischarge pressure
The embodiment of the invention discloses a fan rotating speed control method and belongs to the technical field of air conditioners. The method is applied to equipment using a compressor for temperature adjustment and comprises the steps that when the compressor is confirmed to finish starting, a set rotating speed of a fan is confirmed out of a plurality of preset gradational rotating speeds according to the first ambient temperature, compressor air exhaust pressure and compressor air inlet pressure, and the fan is controlled to run according to the set rotating speed. When a centrifugal compressor is controlled adopting the fan rotating speed control method, appearance of surge and noise due to the compressor pressure ratio is too high can be avoided. The embodiment of the invention further discloses a fan rotating speed control device and a computer readable storage medium.
Owner:QINGDAO HAIER AIR CONDITIONING ELECTRONICS CO LTD
Propeller and aircraft
ActiveCN112483275AReduce the difficulty of layoutImprove working environmentPower plant exhaust arrangementsEngine fuctionsCombustorCombustion chamber
The invention discloses a propeller and an aircraft. The propeller comprises a burner, a gas entering mechanism, a gas discharging mechanism, a transmission mechanism and a shell, wherein the burner is provided with a burning chamber; the gas entering mechanism comprises a pressing assembly which comprises a pressing shell, a pressing gear and a pressing blade; the pressing shell is provided withan air inlet runner and a pressing gear chamber; the pressing gear is provided with a pressing hollow cavity; the gas discharging mechanism comprises an exhausting assembly which comprises an exhausting shell, an exhausting gear and an exhausting blade; the exhausting shell is provided with an exhausting runner and the exhausting gear cavity; the exhausting gear is provided with an exhausting hollow cavity; the transmission mechanism comprises a transmission assembly which comprises an air inlet transmission gear, an exhausting transmission gear and a transmission connecting part; and the shell is provided with a mounting cavity, and the burner, the gas entering mechanism, the gas discharging mechanism and the transmission mechanism are separately mounted in the mounting cavity of the shell. The propeller is simple and compact in structure and space-saving.
Owner:邓云娣
Panel body of air conditioner, air conditioner and air inlet and outlet balancing method of air conditioner
PendingCN109458724ASolve the noiseAvoid surge phenomenonMechanical apparatusLighting and heating apparatusAir volumeControl system
The invention provides a panel body of an air conditioner, the air conditioner and an air inlet and outlet balancing method of the air conditioner. An air inlet is formed in the panel body of the airconditioner; an automatic air inlet volume adjusting mechanism is arranged at the air inlet and comprises an air inlet guiding plate, a control system and a driving motor; the air inlet guiding plateis rotationally arranged at the air inlet; and the driving motor is arranged on the panel body and is used for driving the air inlet guiding plate to rotate according to an instruction of a control system so as to adjust the air inlet volume of the air conditioner. The panel body, the air conditioner and the method have the advantages that the effects of automatic opening and closing of the air inlet are realized by the aid of a control module and the driving motor, the air inlet volume is increased automatically, and the influence of air inlet and outlet imbalance is eliminated.
Owner:AUX AIR CONDITIONING LTD BY SHARE LTD
Surging-prevent compressor volute structure for turbocharger
InactiveCN104879320AImprove stable working rangeRelieve surgePump componentsPumpsImpellerTurbocharger
A surging-prevent compressor volute for a turbocharger adopts the structure that a tapered air inlet is formed in one end of the air intake passage of the compressor volute; an arc-shaped end matched with the outer contour of an arc-shaped blade of an impeller is arranged at the other end of the air intake passage; a circular flow guiding cavity is formed in the inner wall at the joint edge between the air intake passage and the arc-shaped end. During use, the impeller is mounted at the arc-shaped end of the compressor volute; the front edge end of the main blade of the impeller is arranged in the middle of the circular flow guiding cavity. When air disturbance is transmitted to an impeller inlet along the hub line of the impeller, and reaches the front edge of the main blade of the impeller, part of inlet air enters the flow guiding cavity in the form of a vortex after distorting circumferentially, so that a fluid field distorts to be transferred out of the impeller body, and the disturbance distortion of airflow at the impeller inlet is reduced, and is prevented from being further transmitted into the impeller; the airflow angle of inlet air at the impeller inlet is changed, so as to prevent distortion of the fluid field of the airflow at the air inlet end of a compressor, and enlarge the stable working range of the compressor.
Owner:HUNAN TYEN MACHINERY
Method and device for controlling air damper
The invention provides a method and device for controlling an air damper. After it is judged that an engine is in an intermediate-high load operation state, when the engine gets into a fuel cut condition, the air damper opening degree set value is obtained by inquiring a preset table according to current boost pressure and current rotating sped, the closing position of the air damper is adjusted and controlled in time according to the air damper opening degree set value, a relatively airtight space is not formed between the air damper and a booster any more, and the phenomenon of surge of thebooster is avoided.
Owner:WEICHAI POWER CO LTD
Diffuser and compressor
The invention discloses a diffuser and a compressor. The diffuser comprises a body, and a refrigerant spraying hole is formed in the body. Due to the adoption of the above technical scheme, when high-pressure liquid-state refrigerants pass through the refrigerant spraying hole to form fog-shaped liquid-state refrigerants, due to the fact that the fog-shaped liquid-state refrigerants are higher than gas-state refrigerants in heat exchange capacity and are easier than the gas-state refrigerants to evaporate, the cooling effect of the middle flow way gas of the compressor can be effectively improved, and liquid cannot appear in an impeller. In addition, the high-pressure liquid-state refrigerants are directly sprayed, the liquid spraying flow can be effectively improved, the speed of refrigerants in a runner can be improved, and surging can be effectively overcome.
Owner:GREE ELECTRIC APPLIANCES INC
Flow collector used for air flow guiding, volute assembly, centrifugal fan and air conditioner
ActiveCN104373390AAvoid direct impactReduce turbulencePump componentsPump controlEngineeringCentrifugal force
Owner:GREE ELECTRIC APPLIANCES INC
Stability expansion control method for ultrahigh-speed electric air compressor of hydrogen-oxygen fuel cell automobile
ActiveCN112582646AGuarantee job stabilityPrevent backflowReactant parameters controlPropulsion by batteries/cellsUltra high speedFuel cells
The invention discloses a stability expansion control method for an ultrahigh-speed electric air compressor of a hydrogen-oxygen fuel cell automobile, and the stability expansion control method comprises the following steps: S1, obtaining an air inlet pressure value of required air according to the current working condition of the automobile, and recording the air inlet pressure value of the required air as a first pressure value; S2, acquiring an air pressure value of the current net pipe and an outlet pressure value of a secondary air compressor; regarding the air pressure value of the net pipe as a second pressure value, and recording the outlet pressure value of the second-stage air compressor as a third pressure value; and S3, judging the relation among the first pressure value, the second pressure value and the third pressure value, and controlling the electric air compressor according to the relation. The stability of the high-speed electric air compressor during high-speed rotation can be guaranteed.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY
Control method and device of air-cooled chiller unit and air-cooled chiller unit
InactiveCN112815489ASolve technical problems prone to surgeGuaranteed safe operationMechanical apparatusSpace heating and ventilation safety systemsProcess engineeringChiller
The invention provides a control method and device of an air-cooled chiller unit and the air-cooled chiller unit. The method comprises the steps: setting a target water outlet temperature of the air-cooled chiller unit; detecting a current environment temperature; determining a refrigeration correction value of the outlet water temperature of the air-cooled chiller unit according to the current environment temperature and a preset relation, wherein the preset relationship is used for representing the corresponding relation between the environment temperature and the refrigeration correction value; correcting the target outlet water temperature according to the refrigeration correction value, and obtaining the current outlet water temperature of the air-cooled chiller unit; and determining the refrigeration evaporation temperature according to the current outlet water temperature to adjust the low pressure of the air-cooled chiller unit. According to the air-cooled chiller unit, the technical problem that the air-cooled chiller unit in the prior art is prone to surging is solved.
Owner:GREE ELECTRIC APPLIANCES INC OF ZHUHAI
Turbo anti-surge system
ActiveCN104832221BAvoid synchronous changesAvoid surge phenomenonPump componentsEngine componentsTurbochargerEngineering
Owner:TSINGHUA UNIV
Structure and method for reducing surge phenomenon of centrifugal compressor and automatically adjusting flow
InactiveCN111120360AReduce surgeAvoid surge phenomenonPump controlPump installationsWorkspaceControl line
The invention provides a structure and method for reducing the surge phenomenon of a centrifugal compressor and automatically adjusting the flow. Performance testing of the structure for reducing thesurge phenomenon of the centrifugal compressor and automatically adjusting the flow is carried out, a surge control line function is calculated, a surge line, a retardation line and a surge control line in the function divide a working condition area of the centrifugal compressor into a surge area, a normal working condition area and a retardation area, when a display screen in a controller displays the that the relation between the temperature and the exhaust pipe flow, the relation between the vibration frequency and the exhaust pipe flow and the relation between a suction inlet and the exhaust pipe flow are all in the normal working area, a computer does not give any instruction to a PLC, and the centrifugal compressor works normally; and when the relation area between any one of the temperature, the vibration frequency and the suction inlet flow and the exhaust pipe flow is not in the normal working area any more, an electromagnetic valve is adjusted by the controller. The surge phenomenon caused by adjustment errors due to instability of one factor is avoided.
Owner:云南瑞斯德机械有限公司
Blower
InactiveCN102384098AImprove cooling effectImprove efficiencyPump componentsPump installationsImpellerPower flow
The invention relates to a blower comprising a high-speed permanent-magnet machine and a blower body, wherein the rotor of the high-speed permanent-magnet machine is fixedly connected with the impeller of the blower body; the rotor of the high-speed permanent-magnet machine and the impeller of the blower body can rotate synchronously; the impeller is arranged in the housing of the blower body; large blades and small blades are mounted on the impeller alternately; the housing of the blower body is connected with that of the high-speed permanent-magnet machine; an annular air cavity is formed in the housing of the blower body; an inlet duct communicated with the annular air cavity is arranged on the housing of the high-speed permanent-magnet machine; the housing of the blower body takes the shape of a volute; a swirl-shaped air passage is arranged in the housing of the blower body; one side of the swirl-shaped air passage is communicated with the annular air cavity; and the other side of the swirl-shaped air passage is communicated with a gassing bent pipe. The blower provided by the invention has the advantages that the reliability of the rotor is high; the mounting and the processing are simple; the size is small; the efficiency is high; the starting current is small; and the wind volume adjusting is convenient.
Owner:HARBIN DONGAN ENGINE GRP
Anti-surge ring for axial flow fan
InactiveCN104088820ASolve technical problems prone to surge phenomenonAvoid surge phenomenonPump componentsPumpsEngineeringFlange
The invention belongs to the technical field of metro fan devices, and particularly relates to an anti-surge ring for an axial flow fan. The anti-surge ring aims to prevent the surge phenomenon occurring in the axial flow fan. According to the technical scheme, a connecting flange, a small cylinder, two surge flanges, an outer ring, a plurality of spoilers, an inner flow guide ring, a quick connector flange and a quick connector. The outer edges of the surge flanges are connected with the two ends of the outer ring to form an anti-surge ring cavity, the right end of the small cylinder is connected with the inner edge of the surge flange on the left side, the left end of the small cylinder is connected with the inner edge of the connecting flange, the left end of the quick connector is connected with the inner edge of the surge flange on the right side, the quick connector flange is arranged in the middle of the outer surface of the quick connector, and the inner flow guide ring is arranged on the left edges of the spoilers. The anti-surge ring for the axial flow fan has the advantages of being convenient and fast to install and reducing vibration friction among all components.
Owner:SHANXI ANRUI FAN ELECTRIC
Gas compressor with variable camber guide vanes
InactiveCN108757507AThe principle is simpleImprove supercharging efficiencyPump componentsAxial flow pumpsAxial compressorImpeller
The invention discloses a gas compressor with variable camber guide vanes. The gas compressor is composed of a machine body assembly, a supercharging device and a servo motor. The supercharging deviceis installed between a gas inlet and a main gas chamber of the machine body assembly, gas supercharging is achieved, the supercharging process is stable, energy consumption is low, and high supercharging is achieved according to practical requirements. The servo motor is installed on the outer wall side of a shell. The variable camber guide vanes adopted in the gas compressor are simple in structure and are each composed of a fixed vane and a hinged vane, wherein the hinged position of the fixed vane and the hinged vane is located in the middle of the whole vane, the camber can be adjusted, and vane surface cambers of the two variable camber guide vanes are installed opposite to impeller bins. The inherent frequency of the vanes is changed, and the bending torsional stress of the roots ofthe vanes is reduced. Impellers adopted in the gas compressor are large in gas suction amount, low in noise, high in working efficiency and long in service life, flow equalizing processing for gas suction and gas exhaust is achieved, balance of gas pressure in the shell is ensured, and the surge phenomenon is avoided.
Owner:NORTHWESTERN POLYTECHNICAL UNIV
System and method for wet flue gas desulfurization and oxidation monitoring in cooperation with sulfur mixing and blending combustion of thermal power plant
PendingCN113357659AImprove adaptabilityIncrease diversityEmission preventionSolid fuel pretreatmentCombustionFlue gas
The invention discloses a system and method for wet flue gas desulfurization and oxidation monitoring in cooperation with sulfur mixing and blending combustion of a thermal power plant, and belongs to the technical field of sulfur mixing and blending combustion of thermal power plants. The system comprises an absorption tower for desulfurization reaction, an SO2 inlet pipe, a boiler and a slurry oxidation analyzer, wherein the SO2 inlet pipe is arranged on the outer side of the absorption tower, an SO2 outlet is formed in one side of the upper end of the absorption tower, and detection equipment is arranged at the SO2 outlet; the boiler is arranged at the upstream of the absorption tower, a flue gas channel of the boiler communicates with the SO2 inlet pipe, and a furnace coal quality analyzer is arranged at the upstream of the boiler; and the slurry oxidation analyzer is arranged at the downstream of the absorption tower. According to the system, the sulfur mixing and blending combustion function is integrally guided by desulfurization, so that the desulfurization potential is excavated to the maximum extent, the actual desulfurization maximum output is found out, the sulfur content of fire coal can be further increased from a design value and determined by a blending combustion experiment, the purchasing range of the coal coming market of a power plant is enlarged, the adaptability and diversity of the fire coal are improved, economic coal with higher sulfur content is purchased, and the power generation cost is greatly reduced.
Owner:安徽科力德能源环境科技有限公司
Compact centrifugal fan
PendingCN114352573AReduced strengthImprove the state of gas flowPump componentsMechanical energy handlingSound qualityCentrifugal fan
The invention discloses a compact centrifugal fan which comprises a volute, a driving device and an impeller, the driving device is connected with the volute and the impeller, the impeller is rotatably installed in the volute, the volute is provided with an air inlet and an air outlet, the volute is fixedly connected with an anti-vortex ring, the anti-vortex ring is located in the volute, and the driving device is connected with the driving device. The whole anti-vortex ring is in a bent arc shape, the anti-vortex ring is located in the radial direction of the impeller, and an interval space is formed between the anti-vortex ring and the impeller. The volute has the beneficial effects that the influence of axial secondary flow on vortex is effectively weakened, the sound quality of the fan is ensured while the performance of the fan is considered, air in the volute flows more smoothly, the phenomena of surge, repeated flow fluctuation and violent shaking of the fan are effectively prevented, and the service life of the fan is prolonged. The device has the advantage that the phenomena of surge, repeated flow fluctuation and violent fan shaking can be prevented.
Owner:FANS TECH ELECTRIC CO LTD
Gas pressure regulator anti-surge device
PendingCN110274065AHigh voltage regulation accuracyAvoid surge phenomenonValve members for absorbing fluid energyEqualizing valvesDistribution systemPressure regulator
The invention relates to a gas pressure regulator anti-surge device and belongs to the technical field of gas transmission and distribution systems. The device comprises a first damper and a second damper. The first damper is arranged transversely, the gas inlet end of the first damper communicates with an impulse pipe communicating with a gas outlet pipeline, and the gas outlet end of the first damper communicates with a gas outlet pipeline communicating with a lower cavity; and the second damper is mounted in a breathing port of an upper cavity and of a structure consistent with that of the first damper, the second damper is arranged vertically, and the upper end of the second damper communicates with the external atmosphere. By controlling the ventilation flow rates of the first damper and the second damper, the gas flow speeds of the upper cavity and the lower cavity are regulated and controlled, resonance between the upper cavity & the lower cavity and a valve port is disrupted, accordingly, the pressure stabilizing precision of a pressure regulator is improved, and a surge phenomenon of the gas pressure regulator can be effectively prevented.
Owner:SHANGHAI FIORENTINI GAS EQUIP
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