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1、设计巴巴工作室www.88doc88.comScreeningVibratingscreensPrinciples--Vibratingscreenssavespaceandweightandoperateonlittlepowerbecausethescreeningsurfacemaybeactuatedbyvibrating,gyratingorpulsatingmovementofsmallamplitude,butatfrequenciesthatnormallyexceed3,000/min.Sele
2、ctionofProperVibrationSereen--Besurethescreensupplierknowsalldetailsoftheapplication.Thecentrifugalforcefactor,orcombinationoffrequencyofvibration(speed)andamplitude(throw),mayaffectperformanceofanyvibratingscreen.Also,acorrectcombinationofslopeanddirectionof
3、mechanismrotationisvitalforinclinedscreens.Usually,thelargertheopening,thegreatertheamplitudeneededforascreen.Ifthethrowistoosmall,thematerialmayclogorwedgeintheopenings.Increasingthethrowbeyondwhatisrequiredtopreventblindingorpluggingdoesnotnecessarilyincrea
4、sethelifeofthebearingsandreducescreeningefficiency.Increasedrateoftravelpermitsmoretonnagetobepassedoverthescreenperunitoftime.Foragiventonnage,afasterrateoftravelresultsinathinnerbedofmaterialandhighscreeningefficiency.Maximumslopeisreachedwhenthematerialtra
5、velstoofastforthefinestopenetratetheribbonofmaterialandreachtheaperturesinthescreencloth.Atthispointanexcessiveamountoffinematerialpassesoverthescreenwiththeoversize,resultinginpoorefficiency.Whenanexistingscreenistobeusedforanapplicationotherthanthatforwhich
6、itwasoriginallyintended,checkwiththeSuppliertoseeifanyoftheoperatingcharacteristicsneedmodificationandifthethescreenisstructurallysuitableforthenewapplication.Theoperatorcangetthecorrectvibratingscreenbyprovidingthesupplierwiththefollowinginformation:·Maximum
7、tonsperhourtobescreened,includinganycirculatingloadoranysurgesinthefeedrate.·Acompletesizeconsistorsieveanalysisofthematerialor,ifavailable,anestimatedanalysis.·Typeofmaterialandweightpercubicfootinbrokenstate.设计巴巴工作室www.88doc88.com辽宁科技大学本科生毕业设计第2页·Separation
8、sdesiredoneachdeck.·Surfacemoisturecarriedbythematerialifscreeningistobedryoramountofwaterwithfeedifwet.·Specialoperatingrequirementsorconditionssuchastemperature,abrasiveness,corrosivene
