types of bearings

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1、4TypesofBearingsTherearemanytapesofbearingsofvariationsinthedesignofringsandseparatorsandinthenumberofballs.Theycanbedividedintoclassesaccordingtotheirfunction;thosethatsupportaradial,thosethatsupportathrustload,orthosethatsupportacombinationofthrustandradialloads.1.

2、DeepgrooveradialballbearingsIndeep-grooveballbearings,theracesareapproximatelyone-fourthasdeepastheballdiameter,althoughdeep-grooveballbearingsaredesignedtocarryaradialload.Theyperformwellunderacombinedradialandthrustload.Forthisreason,itisthewidelyusedtypeofballbear

3、ing.2.Filled-notchballbearingsThemosteffectivewayofincreasingbearingloadballcapacityistoincreasetheballcomplement.Filled-notchballbearingsareaccomplishedbycuttinganotchintheracesofaconventionalbearing,therebypermittingtheinsertionoftheballs.Oncetheballshavebeeninsert

4、edintothebearingthroughthenotchisfilledbyaninsert.Theinsertshouldbekeptontheunloadedsideofthebearing,foritweakenstherace.Theincreaseballcomplementmakespossiblea20to40percentincreaseinradial-loadcapacityoverthatofthenormaldeep-groovebearing,dependingonbearingsize.Thet

5、hrustcapacityofthefillednotchtypeisonly20%ofthethrustcapacityofthedeep-groovebearing.3.AngularcontactbearingsAunidirectionalthrustbearing,whichisthemostpopularformofangularcontactbearings,iscommontous.Thistypeofbearingisdesignedtosupportcombinedradialandunidirectiona

6、lthrustloads.Theamountofthrustloadthatthisbearingcansupportisheavierthanthesmaller-contact-angle.Acontactangleofzerocorrespondstoaradialbearing;acontactangleof90degreecorrespondstothrustbearing.4.Self-aligningballbearings44Self-aligningballbearingsnormallyhavetworows

7、ofballsthatrollinacommonsphericalraceintheouterring.Becauseofthedesign,theinnerring,withtheballcomplement,canalignitselffreelyaroundtheaxisoftheshaft.Whentheshaftbendsunderload,thebearingwillfollowthedeflectingoftheshaftwithoutresistance,self-alignmentalsocontributes

8、tosmoothrunningbyneutralizingtheeffectoftheballwobblinginthegrooves.Thisbearingisthereforeparticularlyusefulinapplicationsinwhichit