Withthedevelopmentofindustrialization,largegearboxeshavebeenmoreandmorewidelyusedinenterprises.Thispaperanalyzesthecommoncausesofbearingdamageintheoperationoflargegearboxes,aswellastheadjustment,measurementandinstallationmethodsofbearingclearance.

    Therearefivereducersinthesinteringproductionlineofthesteelmill,andthefaultsoccurintheprocessofoperationarethesame.Therefore,oneofthemistakenasanexample:thereducermodelisSQAS1845-I-D×NH(four-stagequenchedcylindricalgear),andthecenterdistanceofthereduceris1845mm.Speedratioofreducer25.46;

    23232CC/W33(Doublerowself-aligningrollerthroughbearing)highspeedshaftbearings.Afterinspectionandanalysis,thereasonisthatthebearingclearanceadjustmentisimproper,resultinginbearingheatingclamp,resultingindamagetohigh-speedshaftandbearing.

    Thereisacertaingapbetweentheinnerandouterringsofthegearboxbearingclearanceandtherollingbody,sothattheinnerandouterringshaverelativedisplacement.Whenthereisnoload,thedisplacementofaringfromonelimitpositiontoanotheriscalledradialclearanceandaxialclearancerespectivelyalongtheradialandaxialdirectionsofthebearing

    Accordingtothestateofthebearingenterprise,clearanceisdividedintothefollowingthreekinds.

    (1)Originalworkingclearance.Referstotheclearanceofrollingdevelopmentbearingsinfreelivingstatebeforeinstallation,whichisdeterminedbythemanufacturingplant'sproduction,processingandassembly.

    (2)Installationclearance,alsoknownasmatchingclearance.Duetoanoverlyprofitableinstallation(theinnerringisenlargedortheouterringissmaller,orbotharethesame),theinstalledplaybackissmallerthantheoriginaldevice.

    (3)Workgames.Whentherollingbearingplaysintheworkingstate,whenthetemperatureoftheworkinginnerringrisesgreatlyandthethermalexpansionislarge,thebearingclearanceisreduced.Atthesametime,duetotheactionofload,thecontactbetweentherollerandtheracewayproduceselasticdeformation,increasingthebearingclearance.

    (RunningtheworldpowerdragondragonoutoftheEasttengdaworldDragonthreetypesofself-aligningrollerbearingLiuXingbangCACCEMBMA)