粉碎机英文文献

AnImprovingDesignofSolidGarbageCrusherforGarbageCoalProductionLineMeifaHuang;ZuyuLi;BingKuangSchoolofMechanicalandElectricalEngineeringGuilinUniversityofElectronicTechnologyGuilin,[e-mail]—Solidgarbagecrusherisoneofthemostimportantequipmentsingarbagecoalproductionline.Faultsofsolidgarbagecrusherhavegreatinfluenceontheefficiencyofgarbagecoalproductionline.Tosolvetheproblem,animprovingdesignofsolidgarbagecrusherispresented.Thekeyfactorsthatcausethefaultstocrusherareconfirmedthroughthestresscomputationofcuttingtools.Animprovingfixingstyleofcuttingtoolsisproposedtodecreasethestressofcuttingtools.Thefiniteelementanalysisisappliedinthecuttingtoolstodiscoveritsstructurefaults.Andanimprovingstructureofcuttingtoolsisproposedaccordingtotheanalysisresults.Thecalculationresultsilluminatetheimprovingdesignofsolidgarbagecrusherwilleffectivelyincreasetheefficiencyofgarbagecoalproductionline.Keywords-Garbage;Crusher;CuttingTools;I.INTRODUCTIONWiththeincreasingnumberofurbanlivingsolidgarbage,randomdumpingofurbanlivinggarbagehasbeenanimportantfactorofenvironmentalpollution.Howtodealwiththegarbagealsohasbecomeasignificantprobeinsocialcircles.Theexistingurbangarbagedisposalmethodsaremainlytopileuporincineratethesolidgarbage.However,thesemethodshavemanydrawbacks,suchastheycancontributetoairpollutionandrequirelargeareatoplaceorlongtimetodisposeaswell.ThegarbagecoaltechnologyisarenewableenergytechnologyexploitedbyacompanyinGuilin,whichtakesthecompanyafewyearsontheproject.Itistoultimatelyproduceindustrialboilerscoalballandcoalstickusedinindustrythroughaserialprocessesasgarbagesorting,crushing,drying,addingaccelerant,extrusionandotherprocesses.Thistechnologyhastheadvantagesofsmallerfootprint,garbagerecycling,shorttimeofgarbagedisposalandlesspollution.Thesolidgarbagecrusherisoneofthemostimportantequipmentsingarbagecoalproductionline.II.GARBAGECRUSHERSTRUCTUREANDTWOKINDSFIXINGSTYLEOFCUTTINGTOOLTheexistinggarbagecrusherismainlycomposedofcrusherbody,electricaltransportationsystem,rotor,fixedcutters,garbagefilterandotheraccessories.Thegarbagewillbecutintotherequiredsizeinamannerofarotatingbladecuttermeshingafixedbladecutterwhenthegarbageistransportedintothecrusher.Therotatingcuttersarefixedontherotorandthefixedcuttersarefixedonthecrusherbody.AsshowninFigure1.Figure2isthethree-dimensionalmodelrotorwithrotatingcuttingtools[2]mounted.Figure11)Inlet;2)Crusherbody;3)Rotarycutter;4)Blade;5)Spindle;6)Fixedcutter;7)Crusherfilter;Figure2.RotorRotarycutterandfixedcutterarethecorecomponentsofgarbagecrusher.Theirperformancehasdirectimpactontheoverallperformanceofgarbagecrusher,evenonitsworkinglife.OursurveytoacompanythatisrunningagarbagecoalproductionlineinGuilinshowsthatedgecracks,gaps,toolwearandotherfailureswidelyoccuronthecuttingtoolsincludingrotarycutterandfixedcutter,whichusuallyresultinshortertoollifeandlowerproductionefficiencyevenproductionlinescramevents.Toimprovethissituation,weThisresearchwassponsoredbytheGuangxiKeyLaboratoryofManufacturingSystem&AdvancedManufacturingTechnologyFoundation,China(No.07109008_013_Z),andInnovationProjectofGuangxiGraduateEducation,China(No.2009105950802M01).978-1-4244-4813-5/10/$25.00©2010IEEEdesignedanewstructureofrotarycutterandfixingstyleasFigure3andFigure4below.Figure3.PlanviewofrotorwithrotarycuttersFigure4.StructureofrotorIII.THEORETICALSTRESSANALYSISOFTHETWOCUTTINGTOOLSTRUCTUREA.TheexistinggarbagecrusherrotarycutterstressanalysisFromtheexistinggarbagecrushershowninFigure1andFigure2,wecanseethatthegarbageiscutmerelybythecutteredgelikeaflatscrapingthegarbage,whichstrictlycannotbetreatedascutting.Sothiscrushercutterfixingstylehaseasilyledtocuttingtoolsfailurementionedabove,suchasedgecracks,gaps,toolwearandsoon.Andthetoolsedgebecomestheweakestpart.ItsworkingstressanalysisplanshowninFigure5.Figure5CuttingtoolsworkingstressplanCrushertoolsprimarilybeartheshearingstressτcreatedbyshearingforceF1andtheextrusionstressσpcreatedbyextrusionforceF2.ForcesF1andF2aretheresolutionofresultantforceF,whichisalsothegarbagecuttingresultantforce.Themaximumdiameterofcrushinggarbagegrainisacalculationparameterneedingtobedesignated.ThenwecanfigureoutthemaximumworkingshearingforceF1maxandstressτmax,aswellasthemaximumworkingextrusionforceF2maxandstressσbs:PDLPSFp==max1(1)11max1maxLPDLLPDLSFt===τ(2)θtanmax1max2FF=(3)1max2tanLPDSFtbsθσ==(4)Annotation:P---Garbagecrushingstrength,Pa,heredesignatedas100MPa;Sp---Themaximumgarbagecross-sectionalarea,m2；St---CuttingTooledgecross-sectionalarea,m2;D---Themaximumdiameterofgarbagegrain,m;L---Themaximumlengthofgarbage,m,heredesignatedas0.3m;L1---Widthofcuttingtooledge,m;τmax---maximumshearstressoncuttingtooledge,MPa;AstoChineseurbansolidwasteingredients,whenthecrushercrushingstrengthwasabout100MPa,itisbasicallyabletomeetthedemandsofgarbagecrushingstrength[1].AccordingtotheparametersofacompanythatisrunningagarbagecoalproductionlineinGuilin,ofwhichP=100MPa,D=20mm=0.02m,L=0.25m,θ=10°,L1=3mm.From（1）and（3）weget:()NPDLPSFp5max1105×===)(108.8tan4max1max2NFF×==θUse（2）and（4）towo