Q.Whatarethecriteriaforselectionofenddriven,beltdriven,self
guidato, verticalbalancingmachines?
A.Inadynamicbalancingrequirement,theaccuracyofthe
componentandtheeaseofbalancingdecidethemosttechno
economicalsolutioninselectingthebalancingmachineanddrives.
Massproducedcomponentswhicharediskinshape, andsmallin
sizeareinvariablybalancedonaverticalmachinewithbuiltin
correctionequipments. Highprecisionjobsrequiringfinelevelsof
balanceliketurbines, turbocompressori, arebalancedonbeltdriven
machine.Componentslikefansandheavyrotorswhichneed
considerablepowerforaccelerationanddecelerationaredriven
throughuniversalshaftsonabalancingmachine. Veryhighspeed
componentslikeautomobileturbochargerswhereintheerror
inducedbydriveelementsarenotacceptablearebalancedby
usingtheirownreallifesimulatedpowersourceslikecompressed
aria. Theadvantageofthebeltdrivearrangementoveruniversal
shaftdrivenmachineisthetimetofixtheadoptersonthe
componentissavedanderrorsduetoadoptersontheresidual
unbalanceareavoided.
Q.Whataretheunitsofunbalance?
A.Theunitsofunbalancearetheproduct (moltiplicazione) di
permittedunbalanceweightattheradiusofcorrection.
Per esempio
XgramofunbalanceatYmillimeterradiusisdefinedasXYmmgof
squilibrio. Basedonthepracticetheunitscanbein
Metergram
Ounceinches
Graminches
Millimetergram
Millimetermilligram
Ortheproductofalineardistanceunitandaweightunit.The
relationshipbetweenalltheunitsisstraightforwardandcanbe
transferredforoperationalconvenience
Q.Whatarethecriteriaforselectionofenddriven,beltdriven,self
guidato, verticalbalancingmachines?
A.Inadynamicbalancingrequirement,theaccuracyofthe
componentandtheeaseofbalancingdecidethemosttechno
economicalsolutioninselectingthebalancingmachineanddrives.
Massproducedcomponentswhicharediskinshape, andsmallin
sizeareinvariablybalancedonaverticalmachinewithbuiltin
correctionequipments. Highprecisionjobsrequiringfinelevelsof
balanceliketurbines, turbocompressori, arebalancedonbeltdriven
machine.Componentslikefansandheavyrotorswhichneed
considerablepowerforaccelerationanddecelerationaredriven
throughuniversalshaftsonabalancingmachine. Veryhighspeed
componentslikeautomobileturbochargerswhereintheerror
inducedbydriveelementsarenotacceptablearebalancedby
usingtheirownreallifesimulatedpowersourceslikecompressed
aria. Theadvantageofthebeltdrivearrangementoveruniversal
shaftdrivenmachineisthetimetofixtheadoptersonthe
componentissavedanderrorsduetoadoptersontheresidual
unbalanceareavoided.
Q.Wehavebalancedafanonthebalancingmachineandwhenwe
testonastaticbalancingstandweseeheavyspotinthefan?
A.Inthepictureaboveadynamicbalancingmachinemeasuresthe
resultantofthethreeresultantunbalanceforcesnamelythestatic
componente“S“, andthecouplecomponent“+ Cand-C”Il
valuescanberecordedbyusingtheprogramtwoplanemeasuring
andstatic/couplemeasuringsections.
WhenusingamachineyoucompensateallunbalancesieS, + C,-C.
Butwhencheckonastaticbalancingstandthecoupleportionun
balancedonotgetcompensated,andonlySiscompensated.so
youhavethehighspotsettlingatthebottomonastaticbalancing
standforcomponentsbalancedonamachine. Inactualservice
conditionswhenthedynamiceffectofallthreeforcesareactingthe
fansbalancedonamachineforbothStaticandCouplewillbe
più liscia.
