Search

Contact us    /     Products    /     Honor    /    Feedback 

Share to:

Mobile website

 

Copyright © 2019  ALL RIGHT RESERVED  辽ICP备06005969号-1   Powered by www.300.cn Dalian

Service Hotline:+86-411-85644098、85618112、85644038

2020-04-18 12:22:00
Advantages and types of insulated bearings
Advantagesofinsulatingbearingcoating: Goodinsulationperformance.Specialsealingmethodisadopted.J20aacoatingcaneffectivelyinsulateeveninhumidenvironment.Insulatedbearingcanbeinterchangedwithstandardbearing.Forspecialoccasions,suchasouterringrotation,itisrecommendedtousebearingwithj20ccoatingoninnerring. Thedrivingendadoptsthecylindricalrollerbearingnu215-e-tvp2-f1-j20aa-c4asthenonpositioningbearing; Thenondriveendadoptsthedeepgrooveballbearing6215-m-j20aa-c3asthepositioningbearing. Typeanddesignofinsulatedbearingfortractionmotor Deepgrooveballbearing 60,62,6340–240mm< Cylindricalrollerbearing NU10130–240mm NU,NJ,NUP2.-E,22,-E60–200mm NU,NJ,NUP3.-E40–190mm Fagtractionmotorbearingsuffixdescription TheradialinternalclearanceofC3,C4andC5islargerthanthatofthecommongroup Mbrasssolidholder,rollerguideJ20aainsulatedbearing,outerringcoveredwithoxideceramiccoating(coatingthickness≈200μm) J20binsulatedbearing,outerringcoveredwithoxideceramiccoating(coatingthickness&lt;100μm) J20cinsulatedbearing,innerringcoveredwithoxideceramiccoating(coatingthickness≈200μm) F1tractionmotorcylindricalrollerbearingconformingtodin43283standard M1brasssolidrivetedcage,rollerguide TVP,tvp2windowtypenyloncage,ifrequired,otherdesignsavailable
2020-01-08 09:53:00
Analysis of different types of bearings and their applications
Thereisnoinnerorouterringandnorollingelementintheslidingbearing.Theyareusuallymadeofwear-resistantmaterials.Usuallyusedforlowspeed,lightweight,lubricationanddifficulttomaintainmechanicalrotatingparts.Theslidingcontactsurfaceofthejointbearingisspherical,whichismainlysuitableforswingmotion,tiltmotionandrotationmotion.Rollingbearingisdividedintoradialbearingandthrustbearingaccordingtoitsloaddirectionornominalcontactangle.Theradialcontactbearingisaradialbearingwithanominalcontactangleof0,andtheradialcontactbearingisaradialbearingwithanominalcontactanglegreaterthan0to45.Bearingisanimportantpartofmodernmechanicalequipment.Itsmainfunctionistosupportthemechanicalrotator,reduceitsfrictioncoefficientintheprocessofmovement,andensureitsrotationaccuracy.Generally,bearingmodelsarecomposedofprecode,basiccodeandpostcode.Generally,thebearingmodelisonlyindicatedbythebasicmodel.Thebasicmodelgenerallyincludesthreeparts:typecode,dimensioncodeandinnerdiametercode.Thebasiccodeisusedtoindicatetheinnerdiameter,diameterseries,widthseriesandtypeofbearing.Postcodeistouselettersandnumberstoindicatethestructure,toleranceandspecialrequirementsofmaterialsofbearings.Thefrontcodeisusedtorepresentthepartsofthebearingandisindicatedbyletters.
2019-11-21 10:28:00
What is axle box device? How to maintain it?
Theaxleboxdeviceisacomponentofcouplingwheelsetandbogieframeortwoaxlecarbody,whichissleevedontheaxlejournalontherailwaylocomotiveandvehicle. Theaxleboxdeviceisacomponentofcouplingwheelsetandbogieframeortwoaxlecarbody,whichissleevedontheaxlejournalontherailwaylocomotiveandvehicle.Itsfunctionistotransfertheweightandloadofthecarbodytothewheelset,lubricatethejournal,reducethefrictionandreducetherunningresistance.Accordingtothetypeofbearingused,theaxleboxdevicecanbedividedintotwotypes:slidingbearingaxleboxdeviceandrollingbearingaxleboxdevice.Intheearlyyears,therollingbearingaxleboxdevicewasusedinrollingstock.Atthebeginningofthe20thcentury,therollingbearingaxleboxdevicewastriedout,andnowithasgraduallyreplacedtheslidingbearingaxleboxdevice.Rollingbearingaxleboxdeviceshavebeenusedinpassengercars,diesellocomotivesandelectriclocomotives,andinfreightcars. Slidingbearingaxleboxdevice Theaxleboxofthefreightcarisinstalledontheoutsideofthewheelandconsistsoftheaxleboxbody,axleboxcover,bearingbush,bearingpad,oillubricationdeviceanddust-proofplate.Theaxleboxonthedrivingwheelandguidewheelofthesteamlocomotiveisinstalledontheinnersideofthewheel,andtheoilboxisusedtosupplyoiltolubricatethejournal.Otherpartsarethesameastheaboveparts. Axleboxbody Bearingload,storageshaftoilcomponents,usedtocontainjournalandotherparts.Intheearlydays,itwasmadeofcastiron,andgenerallymadeofcaststeel.Theaxleboxbodynotonlytransferstheloadfromtheframetothejournal,butalsobearstheloadsupportedbythejackfromthebottomwhenrepairingandreplacingthebearing,soitshouldhaveenoughstrength.Theaxleboxbodyandtheaxleboxcovermustbetightlyfittedtoavoidoilleakageandpreventrainanddustfromentering.Therearetwotypesofaxleboxbody:guideframetypeandnonguideframetype. Thecomponentthatthebearingbushrubsagainstthejournalandtransfersalltheloadbornebytheaxleboxbodytothejournaliscomposedofthebushbodyandalayerofantifrictionalloyonitssurface.Theearlytileswerecastwithcopperalloy,andlatersteelbackingcopperliningwasused.InChina,ductileironwasused.Theantifrictionbearingalloy,commonlyknownaswhitealloy,usedinChineserailwayvehiclesisleadantimonytinalloy.Thealloyiseasytoscrapeandgrind,hasgoodcompressionresistance,antifrictionandheatresistance,andiseasytocast.Inrecentyears,inordertopreventtheearlyscrappingofthebearingbushandavoidburningtheshaft,thefrontendofthebearingbushofthefreightcarwiththecapacityofmorethan50tonsisinlaidwithaplastichead. Bearingpad Thepartsinstalledbetweentheaxleboxbodyandthebearingshelltotransfertheload.Itsuppersurfaceisarc-shapedtoimprovetheloaddistributiononthesurfaceofwhitealloy.Theliftingheightofthejackcanbereducedbyremovingthebaseplatebeforereplacingthebearingbush. Oillubricationdevice Adevicethatsuppliesshaftoilbetweenthebearingshellandthejournaltoreducefriction.Theutilitymodeliscomposedofanoilcoil,awoodenfrontsleeperandarearbaffleplate,whichisinstalledintheaxleboxbody.Thecoilisfilledwithshaftoil(lubricatingoil)andcontactsthelowerpartofthejournal.Whenthevehicleisrunning,thejournalrotates,bringingtheaxleoilbetweenthebearingbushandthejournal,forminganoilfilm,whichchangesthedryfrictionintoliquidfriction.Intheearlydays,oilcoilsweremadeofcottonwool,someofthemweremadeofoilbrushes.Inrecentyears,China'srailwayvehicleshaveswitchedtofoamplasticwrappedwithtowelcovers.Thefunctionofthewoodenfrontpillowistoreplacetheoilrollattheouterendofthejournalandpreventtheoilrollfrommovingout.Thebackbaffleisusedtopreventtheoilfromoverflowingfromtherearendofthejournal.DustboardItsfunctionisthesameastheaxleboxcover,soitisalsocalledtheaxleboxrearcover.Itislocatedintheinterlayerofthebackwalloftheaxlebox,whichismostlywooden.Thewooddust-proofboardhaspoorsealingperformanceandoftenleaksshaftoil.Inrecentyears,rubberdust-proofboardisgraduallyused.RollingbearingaxleboxdeviceAdvantagesofrollingbearingaxleboxdeviceComparedwiththeplainbearingaxleboxdevice,therollingbearingaxleboxdevicecanreducetherunningresistanceoflocomotiveandvehiclebyabout10%andthestartingresistancebymorethan80%.Itcannotonlysavethepowerconsumption,improvetherunningspeed,butalsoincreasethetractionweightofthetrain.Thetravelingclearanceofeachpartofthedeviceissmall,whichisconducivetoimprovingtherunningqualityofrollingstock.Ithasasmallfailurerateinoperation,whichcanreducethelaborandmaterialconsumptionofmaintenancework.Therefore,althoughthemanufacturingcostofrollingbearingaxleboxdeviceismuchhigherthanthatofslidingbearingaxleboxdevice,itisstillwidelyused.FormRollingbearingaxleboxdeviceisusuallycomposedofaxlebox,frontandrearaxleboxcover,rollingbearing,sealingdeviceandotherparts.Therearethreekindsofrollingbearingsused:cylinder,coneandsphere.Thesphericalrollingbearingbearsbetteraxialload,butitrequireslargersize,whichisnotconducivetoreducingtheweightunderthespring,andhashighermanufacturingcostandinconvenientmaintenance,soitisseldomusedinrecentyears.CylindertyperollingbearingaxleboxdeviceisusedinpassengercarsinChinaRailway,anditisalsomainlyusedindiesellocomotivesandelectriclocomotives.Inpassengercars,theaxialforceisbornebytheflangeontheinnerandouterring
2019-10-23 14:37:25
The difference between bearing and bearing seat. What are their respective roles? When to use them!
Page Up
1
2