对于轴承，存在疲劳强度问题。有些SKF进口轴承质量好，疲劳强度高。如果质量差，自然疲劳强度低。疲劳强度不是很高。在多大程度上？让我们详细讨论一下。Forbearings,thereisafatiguestrengthproblem.SomeSKFimportedbearingsh***egoodqualityandhighfatiguestrength.Ifthequalityispoor,thenaturalfatiguestrengthislow.Thefatiguestrengthisnotveryhigh.Towhatextent?Let'sdiscussitindetail.在循环载荷下，即使应力低于屈服强度，材料也经常断裂。这种现象称为疲劳断裂。进口轴承的疲劳断裂，特别是gao强度进口轴承材料的疲劳断裂，在断裂前通常没有明显的塑性变形，难以检测和预防，具有很大的***性。我们bi须注意这一点。不要让这些***存在。我们需要及时笑除它们。Undercyclicloading,thematerialoftenbreaksevenifthestressislowerthantheyieldstrength.Thisphenomenoniscalledfatiguefracture.Fatiguefractureofimportedbearing,especiallythefatiguefractureofGaostrengthimportedbearingmaterial,usuallyhasno***iousplasticdeformationbeforefracture,whichisdifficulttodetectandprevent,andhasgreatdanger.WeBineedtopayattentiontothispoint.Don'tletthesedangersexist.Weneedtolaughthemoutintime.SKF进口轴承疲劳强度是指材料在反复应力循环后连续出现裂纹的***大应力，用来表征材料的疲劳断裂抗力。通过实验测量了材料的循环应力。循环应力越小，断裂前循环次数越多。当应力降低到一定值时，曲线趋于平缓，即在应力作用下，材料在反复应力循环后不会断裂。ThefatiguestrengthofSKFimportedbearingsreferstothe***largestressinwhichcracksoccurcontinuouslyafterrepeatedstresscycles,whichisusedtocharacterizethefatiguefractureresistanceofmaterials.Thecyclicstressofthematerialwasmeasuredbyexperiments.The***allerthecyclicstress,themorethenumberofcyclesbeforefracture.Whenthestressdecreasestoacertainvalue,thecurvetendstobeflat,thatis,underthestress,thematerialwillnotbreakafterrepeatedstresscycles.疲劳断裂过程是材料表面和内部裂纹的形成、扩展、连接和扩展过程。通过改进SKF进口轴承设计（如避免尖角、降低表面粗糙度等避免应力集中的措施）和表面强化，可以提高构件的扛疲劳性能。Fatiguefractureprocessistheprocessofformation,propagation,connectionandpropagationofcracksonthesurfaceandinsideofmaterials.ByimprovingthedesignofSKFimportedbearings(suchas***oidingsharpangle,reducingsurfaceroughnessandothermeasuresto***oidstressconcentration)andsurfacestrengthening,thecarryingfatigueperformanceofcomponentscanbeimproved.不建议注入过多的润滑脂。我们知道润滑脂具有良好的粘附性、耐磨性、耐温性、防锈性和润滑性。可提高耐高温氧化性，延缓老化，溶解碳，防止金属碎屑和油污结块，提高SKF进口轴承机械的耐磨性、耐压性和耐腐蚀性。Itisnotrecommendedtoinjecttoomuchgrease.Weknowthatgreasehasgoodadhesion,wearresistance,temperatureresistance,rustresistanceandlubricity.Itcanimprovehightemperatureoxidationresistance,delayaging,dissolvecarbon,preventmetaldebrisandoilpollutionfromagglomerating,andimprovewearresistance,pressureresistanceandcorrosionresistanceofSKFimportedbearingmachinery.因此，大量实验证明，当注脂量小于内腔容积的30个百分点时，轴承中不饱和润滑脂的泄漏量很小。值得注意的是，虽然有时脂肪***并不多，但脂肪***方法不规范、不科学，导致轴承室油不均匀，轴承部分饱和，早期出现快速“挤出”现象。Therefore,alargenumberofexperimentsh***eprovedthattheleakageofunsaturatedgreaseinbearingsisvery***allwhentheamountofgreaseinjectionislessthan30%ofthevolumeoftheinnerc***ity.Itisworthnotingthatalthoughtherearenotmanyfatinjecti***sometimes,themethodoffatinjectionisnotstandardizedandscientific,resultinginunevenoilinthebearingchamber,partialsaturationofthebearing,andrapid"extrusion"phenomenonintheearlystage.对于油平衡过程，建议适当提高转速。针对密封SKF进口轴承的不同性能特点和用途，提出了不同重Dian和内容的密封轴承试验评价方法。但是每个性能测试都是一个重要的研究课题。同时，密封轴承试验评价方法也是验证和改进设计和质量控制的重要手段。Fortheoilbalanceprocess,itissuggestedtoincreasethespeedappropriately.AimingatthedifferentperformancecharacteristicsandusesofimportedsealedSKFbearings,thetestevaluationmethodsofsealedbearingswithdifferentDianweightsandcontentsareputforward.Buteveryperformancetestisanimportantresearchtopic.Atthesametime,theevaluationmethodofsealbearingtestisalsoanimportantmeanstoverifyandimprovethedesignandqualitycontrol.文章来自：SKF进口轴承www.wh-Articlefrom:SKFimportedbearingwww.wh-文章来自：INA轴承a-Articlesfrom:INABearinga-文章来自：NSK轴承Articlefrom:NSKBearing***：524085168***:524085168电话：0510-81207777Tel:0510-81207777手机：13311666672/13395185757Mobilephone:13311666672/13395185757)