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Company profile

WHO WE ARE

Zhejiang Yitong Machinery & Electronics Co.,Ltd.Founded in 1993 is a company engaged through various types of high-pressure centrifugal fan, the air compressor, axial fan, centrifugal fan, exhaust fan and low-noise multi-wing centrifugal fan and so on, vibrator, motor professional manufacturer. joint tree is located in Wenling City Industrial Park, close to 104 National Road, Ling , Huangyan airport, Haimen port, sea, land and air transportation is very convenient. ...

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Centrifugal fans to develop, reduce power consumption is the key

Centrifugal fans to develop, reduce power consumption is the key

2019-03-21
Familiar with the working principle of centrifugal fans understand that for the centrifugal fan, the fan is actually a high energy-consuming equipment, from some of the comparative data to analyze.
In the design of centrifugal fans to consider which aspects

In the design of centrifugal fans to consider which aspects

2019-03-21
Inthedesignofthecentrifugalfan,theneedtoconsiderthebodystructure,volumeflow,workingmediumtemperatureanddensity,andsometimesneedtotakeintoaccountsomespecialrequirementsandsoon.Therefore,weshouldfirstunderstandthecentrifugalfanofthegeneraldesignrequirements,inordertocarryoutareasonabledesign,toavoidmistakes.Therequirementsforcentrifugalfandesignaregenerally:meettherequiredflowandpressureconditionsshouldbeinthevicinityofthehighestefficiencypoint;thehighestefficiencyvalueshouldbeaslargeastheefficiencycurveflat;pressurecurvestableworkingrangetowide;fanstructureissimpleEasytooperateandeasytooperate,easytooperate,easytooperate,easytooperate,easytooperate,easytooperate,easytooperate,easytooperate,easytooperate,easytooperate,easytooperate,Easydisassemblyandtransportation.Infact,itisgenerallyimpossibletomeetalloftheaboverequirements,forexample,thereisoftenacontradictionbetweenaerodynamicperformanceandstructure(strength,process).Thesolutiontothecontradictionistoseizethemaincontradictionstocoordinatethesolution,whichrequiresdesignerstochooseareasonabledesign.Centrifugalfansusedifferentrequirementsarenotthesame,suchaspublicbuildingsusedincentrifugalfansaregenerallyusedforventilation,themostimportantrequirementisthelownoise,multi-wingcentrifugalfanwiththisfeature;andrequirelargeflowOfthecentrifugalfanisusuallydoublesuctiontype;forsomehigh-pressurecentrifugalfan,thanthelowspeed,therelativeproportionofitsleakagelossisgenerallylarger.Centrifugalfaninthedesignshouldpayattentiontothefollowing:(1)leafexitangleselection:leafexitangleisthedesignofthefirsttobeselectedoneofthemaingeometricparameters.Inordertofacilitatetheapplication,theleavesareusuallyclassifiedas:strongafterbendingtheblade,afterbendingthecircularblade,afterbendingstraightblade,afterbendingmachinewingblade;radialexitleaves,radialstraightblade.(2)reasonablechoiceofbladetype:commonfanatacertainspeed,theimpellertothesmallerpressurecoefficient,theimpellerdiameterislarger,anditshighefficiency;theoppositeistheoppositeoftheimpeller.(3)thechoiceofvolutesize:volutesizeshouldbeassmallaspossible.Forthehighthanthenumberofwindturbines,canbeusedtoshortenthescroll,thelowerthanthenumberofwindturbinesgenerallyusethestandardscroll.Sometimesinordertonarrowthevolutesize,optionalvoluteexportspeedisgreaterthanthefaninletspeedprogram,thistimeusingtheexportdiffusertoimproveitsstaticpressurevalue.(4)thechoiceofthenumberofleaves:Inthecentrifugalfan,increasingthenumberofleavesoftheimpellercanincreasethetheoreticalpressureoftheimpeller,becauseitcanreducetheimpactofrelativevortex.However,theincreaseinthenumberofbladeswillincreasethefrictionlossoftheimpellerchannel,whichwillreducetheactualpressureofthefanandincreasetheenergyconsumption.Thus,foreachimpeller,thereisanoptimalnumberofblades.Determinethenumberofleaves,sometimesbasedontheexperienceofthedesigner.(5)thechoiceoffullpressurecoefficient:thedesignofcentrifugalfan,theactualpressureisalwaysgiveninadvance.Atthistimeneedtoselectthefullpressurecoefficient.(6)thedeterminationofthemaingeometricdimensionsoftheimpellerinletandoutlet:theimpelleristheonlycomponentofthefan'senergydeliveredtothegas,soitsdesignhasagreatinfluenceonthefan;canthecorrectstructureoftheimpellerbedeterminedcorrectlyandtheperformanceparametersofthecentrifugalfanKeyrole.Itcontainsthekeytechnologyofcentrifugalfandesign-thedesignoftheblade.Thekeypartofthedesignofthebladeishowtodeterminethebladeexitangle.