Q.Whyismeasuringofbalancingspeedofthecomponentvery
importantinabalancingmachine?
А.Balancingmachineisanindustrialmachine.Themachineis
locatedinafactoryenvironmentalongtheprocessline. Manytypes
ofindustrialnoiseselectrical, механични, magneticwillexistinan
industrialenvironment. Besidesthisbalancingmachinehasdrive
elementslikemotors, шайби, beltswhichalsorotatealongwiththe
компонент. Thecomponentismountedonrollers androllersalso
rotatealongwiththecomponent. Thetransducerswillpickup
signalsfromallrotatingelements. Theelectronicsofthebalancing
machineneedsareferencesignaltoextracttheunbalancesignalof
thecomponentbeingbalanced. Thespeedsignalofthecomponent
beingbalancedprovidesthereferenceforsignalextraction.
Inolderstroboscopemachines itcanbeobservedthatthe
unbalancelocationwillstartshifting/oscillatingoverawideangle
whenbalancingisdone. Inmodernmachineswithphaselockloop,
theshiftofangleisreducedtoinsignificantlevels.
Q.Whydoweneedmultispeedbalancingmachines?
A.Multispeedbalancingmachinesarenormallybigsizemachines
andmachineswhichhandlearangeofjobs. Incasethecomponent
isamassproducedcomponentwithpredictablelevelsof
дисбаланс, singlespeedmachinescanbetunedtobalancethe
componentsfasterandwellwithinthetolerance. Butinheavy
компоненти, thelevelofunbalancemaynotbeknowninitially. Той
maybehazardousfromthepointofsafetytodirectlyrunthe
componentattherequiredbalancingspeed. Така, heavycomponents
arerunatlowerspeeds initialbalancingisdone. Furtherbalancing
isdoneathigherspeedstillthedesiredlevelofaccuracyis
Постигнати.
Q.DoweneedtoputDynamicBalancingMachinesonafoundation?
A.Balancingmachineisanindustrialmachineusedtomeasure
Vibrationandcomputetheresidualunbalance.ModernHardBearing
BalancingMachinesareforcemeasuring.ItisessentialthattheMachine
donotvibrateorshakeforcorrectmeasurementofunbalanceamountand
phaseangle.
Formorepreciseresultsitisrequiredtomountthemachinesfirmlyonanindustrialfloor.
Q.Whatisunbalancereductionratio?
A.Balancingmachineinstrumentationindicatesthelevelofunbalanceon
thecomponentbeingbalanced. Agoodmachinecanindicateavalueand
whenacorrectionequivalenttothevalueshownisexecutedthenextresultantresidual
unbalanceshouldbebelow90 - 95 % ofthefirstindicatedvalue.
Forexample onthefirstrun, ifthemachinehasshownsay50gramatagivenlocation.
Whena50gramweightisaddedatthatlocationandaresidualunbalancereadingtaken,
incasethemachineindicatesavalueof5gramandbelow thenitissaidthatthemachine
ishavinganunbalancereductionratioofabout90 %.
FormoredetailsrefertotheISOstandards1940 2953etc.
Q.Whatisplaneseparation,crosseffect,influence?
A.Intwoplanedynamicbalancingmachines,theresultsareindicatedintwo
correctionplanes. Whenacorrectionismadeononeplane theeffectofthe
unbalancecompensationonthesecondplane isdefinedasplaneseparation
orcrosseffectorinfluence. Обикновено theplaneseparationwillbewellbelow3 %.
Incomputerbasedhardbearingdynamicbalancingmachines theplane
separationisachievedmathematically. Souserstendtogetbetter
levelsofplaneseparationoncomputerizedhardbearingdynamic
balancingmachinesandthatisnotthecasewithsoftbearing
machineswhereinunbalancesignalsareelectronicallymixedand
modulatedforindicatingtheresults.
