ASTM B966-2010 使用氮气测定(PM)轴承的磁导率的标准试验方法

作者:标准资料网 时间:2024-05-20 23:50:29  浏览:8402   来源:标准资料网

【英文标准名称】:StandardTestMethodforPermeabilityofPowderMetallurgy(PM)BearingsUsingNitrogenGas
【原文标准名称】:使用氮气测定(PM)轴承的磁导率的标准试验方法
【标准号】:ASTMB966-2010
【标准状态】:现行
【国别】:美国
【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】:B09.04
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:oilfilm;permeability;PMbearing;rotameter;self-lubricating
【摘要】:Inservice,thereisaspacebetweenashaftandaself-lubricatingPMbearingthatcontainsanoilfilmwhenthebearingisoperatingproperly.Intheeventtheoilfilmisdisruptedorfailstoformthebearingwillexhibitincreasedwearandpossiblyfail.ThereforetheabilityforoiltoflowthroughtheporosityofaPMbearingiscriticaltotheperformanceofthebearing.Theporosityofthebearingmustbeopentothesurfaceandinterconnectedwithinthebearing.Thisallowstheoilinaself-lubricatingPMbearingtoflowduringoperationtothespacebetweenthebearingandtheshafttoformanoilfilmandprotecttheshaftfromwear.Theabilityofagastoflowthroughthebearingreflectstheopennessandinterconnectedpropertiesoftheporosityinthebearing.Datafromthistestcanbeusedasaninternalqualitytoolandcanbereportedtobuyersofbearings.Anumberofotherfactorsalsoaffecttheperformanceofthebearingandthemovementofoil;factorssuchastheoilviscosity,operatingtemperature,load,shaftspeed,surfacearea,surfacefinishesandothers.Thistestprovidesinformationononlyonepropertyandcannotbethesoleconsiderationinthedesignandtestingofabearingapplication.1.1ThistestmethodcoversthedeterminationofthepermeabilityofaPMbearingwhensubjectedtopressurizednitrogenundercontrolledconditions.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandardwiththeexceptionofflowrateforwhichthecm3/minunitistheindustrystandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:J11
【国际标准分类号】:21_100_01
【页数】:4P.;A4
【正文语种】:英语