【英文标准名称】:Rollingbearings-Dynamicloadratingsandratinglife
【原文标准名称】:滚动轴承.额定动力荷载和额定寿命
【标准号】:BSISO281-2007
【标准状态】:现行
【国别】:英国
【发布日期】:2007-03-30
【实施或试行日期】:2007-03-30
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:轴向止推轴承;滚珠轴承;轴承;定义;动力荷载;寿命;荷载能力;额定负荷;负荷;数学计算;计算方法;径向轴承;额定值;滚动轴承;符号;止推轴承
【英文主题词】:Axial-thrustbearings;Ballbearings;Bearings;Definitions;Dynamicloading;Life(durability);Loadcapacity;Loadratings;Loading;Mathematicalcalculations;Methodsofcalculation;Radialbearings;Ratings;Rollerbearings;Rollingbearings;Symbols;Thrustbearings
【摘要】:ThisInternationalStandardspecifiesmethodsofcalculatingthebasicdynamicloadratingofrollingbearingswithinthesizerangesshownintherelevantISOpublications,manufacturedfromcontemporary,commonlyused,highqualityhardenedbearingsteel,inaccordancewithgoodmanufacturingpracticeandbasicallyofconventionaldesignasregardstheshapeofrollingcontactsurfaces.Thisdocumentalsospecifiesmethodsofcalculatingthebasicratinglife,whichisthelifeassociatedwith90%reliability,withcommonlyusedhighqualitymaterial,goodmanufacturingqualityandwithconventionaloperatingconditions.Inaddition,itspecifiesmethodsofcalculatingthemodifiedratinglife,inwhichvariousreliabilities,lubricationcondition,contaminatedlubricantandfatigueloadofthebearingaretakenintoaccount.ThisInternationalStandarddoesnotcovertheinfluenceofwear,corrosionandelectricalerosiononbearinglife.Thisdocumentisnotapplicabletodesignswheretherollingelementsoperatedirectlyonashaftorhousingsurface,unlessthatsurfaceisequivalentinallrespectstothebearingring(orwasher)racewayitreplaces.Double-rowradialbearingsanddouble-directionthrustbearingsare,whenreferredtointhisdocument,presumedtobesymmetrical.Furtherlimitationsconcerningparticulartypesofbearingsareincludedintherelevantclauses.
【中国标准分类号】:J11
【国际标准分类号】:21_100_20
【页数】:60P.;A4
【正文语种】:英语


【英文标准名称】:StandardTestMethodforMeasuringtheComparativeBurningCharacteristicsofSolidPlasticsinaVerticalPosition
【原文标准名称】:在垂直位置下固体塑料的比较燃烧特性测定的标准试验方法
【标准号】:ASTMD3801-2010
【标准状态】:现行
【国别】:
【发布日期】:2010
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:D20.30
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:燃烧特性;易燃性;塑料;小规模燃烧试验;固态的;垂直燃烧试验;燃烧特性-塑料;燃烧-塑料;比较燃烧特性;灭火特性;易燃性-塑料;加热试验-塑料;固体塑料;垂直位置/测试;
【英文主题词】:burningcharacteristics;flammability;plastics;small-scaleburningtests;solid;verticalburningtests;Burningcharacteristics--plastics;Combustion--plastics;Comparativeburningcharacteristics;Extinguishingcharacteristics;Flammability--plas
【摘要】:Thetestsresultsrepresentafterflameandafterglowtimeinsecondsforamaterialofspecifiedshape,undertheconditionsofthistestmethod.Theeffectofmaterialthickness,coloradditives,andpossiblelossofvolatilecomponentsismeasurable.Theresults,whentabulated,arepotentiallyusefulasareferenceforcomparingtherelativeperformanceofmaterialsandasanaidinmaterialselection.Inthisprocedure,thespecimensaresubjectedtooneormorespecificsetsoflaboratorytestconditions.Differenttestconditionswilllikelyresultinchangesinthefire-test-responsecharacteristicsmeasured.Therefore,theresultsarevalidonlyforthefire-test-exposureconditionsdescribedinthistestmethod.1.1Thisfire-test-responsestandardcoversasmall-scalelaboratoryprocedurefordeterminingcomparativeburningcharacteristicsofsolid-plasticmaterial,usinga20-mm(50W)premixedflameappliedtothebaseofspecimensheldinaverticalposition.Note18212;Thistestmethodandthe20mm(50W)VerticalBurningTest(V-0,V-1,orV-2)ofANSI/UL94areequivalent.Note28212;ThistestmethodandTestMethodBofIEC60695x2013;11x2013;10areequivalent.IEC60695x2013;11x2013;10hasreplacedISO1210.Note38212;Foradditionalinformationonmaterialsthatburnuptotheholdingclampbythistestmethod,seeTestMethodD635.Fortestmethodsofflexibleplasticsintheformofthinsheetsandfilm,seeTestMethodD4804.Foradditionalinformationoncomparativeburningcharacteristicsandresistancetoburn-through,seeTestMethodD5048.1.2Thistestmethodwasdevelopedforpolymericmaterialsusedforpartsindevicesandappliances.Theresultsareintendedtoserveasapreliminaryindicationoftheiracceptabilitywithrespecttoflammabilityforaparticularapplication.Thefinalacceptanceofthematerialisdependentuponitsuseincompleteequipmentthatconformswiththestandardsapplicabletosuchequipment.1.3Theclassificationsystemdescribedintheappendixisintendedforqualityassuranceandthepreselectionofcomponentmaterialsforproducts.1.4Itispossiblethatthistestisapplicabletononmetallicmaterialsotherthanplastics.Suchapplicationisoutsidethescopeofthistechnicalcommittee.1.5Thistestmethoddoesnotcoverplasticswhenusedforbuildingconstruction,finishingorcontentssuchaswallandfloorcoverings,furnishings,decorativeobjectsetc.Inaddition,thefireresistance(intermsofanhourlyrating),flamespread,smokecharacterizationandheatreleaseratearenotevaluatedbythistest.Otherfiretestsexistandshallbeusedtoevaluatetheflammabilityofmaterialsintheseintendedenduseproductconfiguration.1.6ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.7Thisstandardisusedtomeasureanddescribetheresponseofmaterials,products,orassembliestoheatandflameundercontrolledconditions,butdoesnotbyitselfincorporateallfactorsrequiredforfirehazardorfireriskassessmentofthematerials,products,orassembliesunderactualfireconditions.