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1、CalCulatingRolleRBeaRingsfoRWindAnewcalculationmethodfromKISSsoftprovidesrealisticprognosesaboutthefuturebehavior,requiredstability,andservicelifeofagearbox.ByDipl.-Ing.IoannisKaliakatsosdipl.-ing.ioannisKaliakatsosiswithKisssoftag.goonlinetowww.kisssoft.com.RolleRBeaRingsaReessentialpartsinany
2、improvementinthebearingoperatingcondi-mostdevicesandmachineswhoseprimaryfunc-tionshasadirectimpactonthemachineitself,itstionistotransmitpowerandmotion.Theysupportlifecyclecost,andalsointheenvironment.Designtherotatingpartswithinthestationaryones,andtechniquesthatreducethefrictiontorqueorrollert
3、husprovidingbasicfunctionalityinthemachine.lossesofthebearingleadtoimprovedefficiency,andFromthepointofviewofclassicalmachinedesign,advancedmanufacturingprocessesandmaterialsrollerbearingsarejustanothermachineelementprovidebearingswithincreasedservicelifewhilesi-thatneedstobechosenaccordingtoth
4、eoperatingmultaneouslyreducingtheenvironmentalfootprintconditions,yettheyofferapotentialforstand-aloneassociatedwithmanufacturingandrecycling[1].studyandinvestigation.Additionally,lifecyclecostanalysisindicatesthatSincebearingsaretightlyintegratedintothethelargestpartofcostsassociatedwiththeope
5、ra-functionalityofthemachineinwhichtheyoperate,tionofamachineisownershipcosts,incontrastto32AUGUST
6、2011fig.1:linecontactinrollerbearings[5].seRviCelifeCalCulationThenotionofbearingservicelifeisstatisticalinitsmean-ing,anditsoriginscanbetracedbacktotheLundberg-Palmgreentheory[3].Itisstatisticall
7、ydeterminedthatinapopulationofidenticalbearingswhichexperiencethesameoperatingconditions(temperature,loading,speed,andlubrication),thenumberofbearingsinthatpopulationwhichsurviveafteragivenservicedurationdependsontheextentofthisduration.Theservicelifeinwhich90percentofthebearingssurviveistermed
8、thebasicratinglifeLandisgenerallygivenbybearing10manufacturers.Thehighertheratinglife,themorereli-ableasinglebearinginoperationwillbeinfulfillingitsservicerequirements.Untilrecently,thestandardwaytocalculatetherat-inglifeofabearin
