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首页 谈矿用局扇噪音及消除方法(Talking about the noise of mine bur…

谈矿用局扇噪音及消除方法(Talking about the noise of mine bureau fan and its elimination method).doc

谈矿用局扇噪音及消除方法(Talking about the …

陈梅雪
2018-11-20 0人阅读 举报 0 0 暂无简介

简介:本文档为《谈矿用局扇噪音及消除方法(Talking about the noise of mine bureau fan and its elimination method)doc》,可适用于社会民生领域

谈矿用局扇噪音及消除方法(Talkingaboutthenoiseofminebureaufananditseliminationmethod)谈矿用局扇噪音及消除方法(Talkingaboutthenoiseofminebureaufananditseliminationmethod)TalkaboutthenoiseoflocalfanandeliminatingmethodAuthor:adminsource:thestationoffinishinghits:updatetime:Localfanisoneofthemainnoisesourceofmine,itsvalueisoftenupto~dB(A),greatlyexceededthenationalregulationsofnoisestandardTherefore,noisereductionisnotonlytoprotectthehealthofworkersunderground,butalsotheeffectivewaytoimprovetheworkingenvironmentandimproveproductionefficiencyAlocalfannoiseanditsdirectionThefannoiseismainlycomposedofairvortex,bladerotationandmechanicalvibrationsAirflowintotherotatingbladewhenwillproducevortexintheroundleavesWiththebladerotation,andeliminatevortexperiodically,andavortexsoundThefrequencyofvortexbladechangegraduallyalongtheradiusdirection,vortexsoundspectrumisacontinuousspectrumAtthesametime,theairintothefanrotation,notonlytheformationofpulsatingpressureintheblade,butalsooccurredinaircombatleafphenomenon,arotarysoundMerryvoiceandthevoiceofvortexrotationisgenerallyreferredtoasaerodynamicnoiseThefanandthemechanicalnoiseismainlycausedbytheunbalance,thefanrotorbearinginstallation,badindividualpartsofthevibrationandfaultreasonsofcasingInmechanicalnoise,avoiceplaysamajorrole,shellvoicemaybeduetotheformationofthepressurefluctuationinthecaseofforcedvibrationComparedtoairdynamicnoiseandmechanicalnoiseandaerodynamicnoiseisthemainTherefore,thesilencingoflocalfanismainlytoeliminatethefanaerodynamicnoiseThefanaerodynamicnoiselevelandfantype,size,shapeandnumberofleaves,thenumberofrevolutionsperminute,theairflowvelocityandsoonIfthefanisnottherightsize,thefanisnotinoperation,themaximumefficiencyunderhighspeed,unevenairflowcancausethenoisetoincreaseThefannoiseisnotoccurredinalldirectionsisuniformlyradiation,itislikeahemisphericalnoisesource,thefaninletandoutletoutofbothsidesandthefanfrequencynoisespectrumisbasicallythesameSo,inordertoeliminatethenoise,peoplemustbeinthefanairinletandanairoutlet,asilencerorsoundinsulationmeasuresatthesametimeTwo,theeffectiveuseofacousticmaterials,reducethefannoiseIns,theresistivemufflersomeminesinChinausedplantfiber,glassfiber,foamforsoundabsorbingmaterialmakingfanToday,inadditiontosomeunitscontinuetousethesematerialsforsilencing,someunitsofthemicroperforatedpanelcontrolfannoiseMicroperforatedplateusingsoundwavesbecomeobsolete,airfrictionbackandforthintheholeandenergyconsumptionSothesoundabsorbingmaterialcanabsorbenergy,butalsobecauseofporousmaterialsSoundwavescancausevibrationintotheporeairintheporeandfinefibermaterials,duetofrictionandviscousresistance,sothataconsiderablepartofthesoundenergyintoheatabsorbedTherefore,moreandmoreloosematerial,hole,andthesurfaceisfullofpores,betweentheholeandtheholeisconnectedwitheachother,inordertosmooththroughtheacousticmaterial,thesilencingeffectisbettertoattractmaterialThree,improvetheperformanceofequipment,reducethefannoiseFandevelopedlargewindpressureandhighefficiencyandlownoiseTheventilatorusedincoalminemainfan,auxiliaryfanandfan,whilethelocalfanisthemostwidelyused,thelargestnumberofakindofventilationequipmentThereareaboutthousandunitsinoperation,theannualpowerconsumptionforthebillionsofSothedevelopmentoffanpressure,highefficiency,lownoise,smallvolumeandlightweightisverymeaningfulThesuccessfuldevelopmentofMitsuithreepoolfactory"silentonthefan"and"lownoisetypemixedflowfantwofan,theysoundabsorbingstructureiseasytoreplace,canmakethefanrunninginlownoiselongrangeThesuccessfuldevelopmentofShenyangairblowerfactoryBKJNonewminelocalfanwithmeridianacceleration,thehighestefficiencyreached,andthenoiseareathantheoldfantoreducebB(A)abovedevelopmentofsmallventilationresistance,goodsilencingeffectIfthefantotalatalocationoperation,thensoundproofcovervolumetodBfan,ordinarysteelplate(thicknessmm)smallnoiseislldBnoiseHowever,undergroundlocalfanventilationequipmentareoftenmoving,whichbringsdifficultiesforthedevelopmentoflocalfanmufflerFirstofall,inordertoachieveasilencer,thetotallengthofthefanwiththemufflerwithbeforeandafterm,theweightisheavy,sotheminerswouldratherenduretheeffectsofhighnoise,wouldoftencarrythishugemonsterBesides,undergroundspaceislimited,theunitlengthof~msilencingalsobringinconveniencetoproductionTherefore,smallvolumeandlightweight,althoughthevolumeoralittle,alittle,butveryeasytoremovethemuffler,theworkerswillbewelcomestrengthentheventilationpipelinenoisereductionmeasuresWeshouldstrengthentheresearchofnoisecharacteristicsatthesametimeasventilationequipment,includingairduct,therationaluseofitmustbefurtherstudiedTheventilationpipegenerallyhaveasoundvibration,itisbecausethefanandthemotor,andtheflowmovementcausedbypipelineInordertoreducethenoise,shouldflangesinthepipelinejointsconnectingaddsoftrubberorcanvasInordertoreducetheradiationnoiseofthepipewall,availabledampingmaterial(asphaltdampingpaste,asphalt,andplaster)outersurfacecoatedmetalpipewallAndalso,thechoiceofventilationparametersreasonably,sothatthefanoperatesatmaximumefficiency,ensurethestabilityofairflow,inordertocreateagoodworkingenvironment

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谈矿用局扇噪音及消除方法(Talking about the noise of mine bureau fan and its elimination method)

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