翻译机械方面的英语专业文章,关于齿轮的TherigwasdesignedtousetwostandardIAEtestgearpairsandtoallowavarietyoftestconditionsintermsofspeed,loadandoilfeedtemperature.Thegeneralcapabilitiesofthetestrigare
翻译机械方面的英语专业文章,关于齿轮的
TherigwasdesignedtousetwostandardIAEtestgearpairsand
toallowavarietyoftestconditionsintermsofspeed,loadandoil
feedtemperature.Thegeneralcapabilitiesofthetestrigaregiven
inTable1andthetestconditionswerechosentobewithintheload
capacityofthegearsusedinordertoavoidanyriskofscuffing,
pittingortoothbreakage.
Thearrangementoftherig,showninFig.1,issimilarin
principletothatusedbyJohnsonandSpence(1991).Theupper
gearwheelsarerigidlyconnectedtogetherandthetwolower
pinionsaremountedonseparate,alignedshaftswhicharecon-
nectedbyaflangecouplingandtorqueshaftwhichpassesthrough
theleftlowershaft.Loadisappliedtothegearsinthestatic
conditionbymeansofadeadweightleversystemwhichtwiststhe
twohalvesoftheflangecouplingrelativetoeachanother.After
loadingthetwohalvesoftheflangedcouplingareclampedto-
getherbysixscrews.Thewholegearboxismountedonlow
frictiontrunnionbearingswhichallowthemeasurementofthe
totaldrivingtorquebymeasuringthestatictorquereactionforce
appliedtoanelectronicloadcell.Theexternaldriveisapplied
throughtherightlowershaftoftherigviaacouplingonthe
outsideofthegearbox.Thiscouplingcanbedisconnectedtoallow
thegearboxtoswingfreelyonitstrunnionbearingswhencali-
bratingthereactionforceloadcell.Thetwogearsmountedonthe
topshafteachhave1mmdiameteraxialholesdrilledinoneof
theirteethtoallowmeasurementofgeartoothbulktemperatures.
Thermocouplesareembeddedwithintheseholeswhicharesitu-
atedapproximatelylevelwiththepitchlineand2mmbelowthe
drivingsurface.Theuppershaftisprovidedwithcentrallyand
radiallydrilledholestoallowfortheconnectionofthethermo-
couplesviaspecialsilver/graphitesliprings.
Thetestoilwassuppliedtothegearsfromanelectricallyheated
10litertankcapableo