GMW-3157-2012橡胶材料分类体系标准

WORLDWIDEENGINEERINGSTANDARDSGeneralSpecificationGMW3157DurabilityTestforLifeAssessmentofEngineRadialShaftLipSeals©Copyright2012GeneralMotorsCompanyAllRightsReservedApril2012OriginatingDepartment:NorthAmericanEngineeringStandardsPage1of251IntroductionNote:Nothinginthisstandardsupercedesapplicablelawsandregulations.Note:IntheeventofconflictbetweentheEnglishanddomesticlanguage,theEnglishlanguageshalltakeprecedence.1.1Scope.1.1.1Thisgroupoftestsestablishestherequirementsofgasanddieselengineradiallipsealsystems.1.1.2Criteria.ValidationusingGMW3157means:Completingallrelevanttestsdescribedhereinwithoutleakage.Usingproduction-intentdesignpartsinallofthetests.Usingproduction-intentprocesseswheneverpossible.Evenifproduction-intentprocessesarenotused,thepartsmustconformtoallengineeringspecificationsincludingsurfacefinish.1.2Mission/Theme.1.2.1Thisgroupoftestsissuitedtotheevaluationofpassengercarandlightdutytruckunidirectionalrotatingcrankshaftseals,usingbothelastomericandpolytetrafluoroethylene(PTFE)lipsthatexperiencethermal,rotational,andenvironmentalinputsduringservice.1.2.2Camshaft.Testcamshaftsealsatone-halfthecrankshaftspeedsandotherdeviationsasspecified(see1.2.3and1.2.4).Writtenapprovalofthereleaseengineermustbegivenfordeviations.1.2.3Thisstandardisnotintendedforbi-rotational(i.e.,axleshaft)orreciprocatingsealingelements(i.e.,valveguideseals,bondedpistonrings,etc.)1.2.4TheSealraterTestisforProductionPartApprovalProcess(PPAP)validationofmultipletoolcavitiesandnon-functionalchangestothesealdesign,contingentonthedesignpassing(orhavingpassed)thelifetimedurabilitytest.Changesrequiringcompleterevalidationinclude,butarenotlimitedto,changesinlipmaterial,sealproductionprocesses,matingcomponentsurfacefinishanddesignedinterference(form,fit,andfunction).TheuseoftheSealratertestonlytosatisfyarevalidationforprocesschangesmustbeapprovedbytherelease,validation,andsupplierqualityengineers.1.2.5Certainapplicationsmaynotrequirecompletionofthemud/slurrytest(e.g.,camshaftsealsorrearcrankshaftseals).Writtenapprovalofthereleaseengineermustbegivenforsuchdeviationsandrecordedinthetestreport.1.2.6RepresentativeParts.Validationtestsmustuseproductionintentdesignand/ormanufacturingprocessesparts.Keycharacteristicsofthepartsmustbemeasuredanddocumentedbeforetheprocedureisrun.1.3Classification.Notapplicable.2ReferencesNote:Onlythelatestapprovedstandardsareapplicableunlessotherwisespecified.2.1ExternalStandards/Specifications.ASME95ISO4287ASMEB46ISO6194-3ASTME18ISO12103-1DIN3761SAEJ946ISO23722.2GMStandards/Specifications.9985522GMW16077GMW3059GMW16078GMW14872GMW16095GMW15827GMW16096GMW16076GMW166762.3AdditionalReferences.88861206GMServicePartforIndicatorDye88861276GMServicePartforIndicatorDyeRMA0S6RubberManufacturersAssociationBulletinRMA0S18TechnicalBulletin3TestPreparationandEvaluation3.1Resources.CopyrightGeneralMotorsCompanyProvidedbyIHSunderlicensewithGeneralMotorsCompanyNotforResaleNoreproductionornetworkingpermittedwithoutlicensefromIHS--`,,```,,,,````-`-`,,`,,`,`,,`---GMWORLDWIDEENGINEERINGSTANDARDSGMW3157©Copyright2012GeneralMotorsCompanyAllRightsReservedApril2012Page2of253.1.1Calibration.Thetestfacilitiesandequipmentshallbeingoodworkingorderandshallhaveavalidcalibrationlabel.3.1.2Alternatives.Alternativetestfacilitiesandequipmentmayalsobeusedtomeetglobalelectricalrequirements.However,allmeasuringvariablesasspecifiedinthisstandardshallbedeterminedcorrectlywithrespecttotheirphysicaldefinition.3.1.3Facilities.3.1.4Equipment.Allapprovedlabsmusthavethisequipmentunlessotherwisespecified.AschematicofthetestsystemisinAppendixA1andAppendixA2.Minorvariationsfromtheschematic(componentlayout)betweentestlabsispermittedprovideditdoesnotaltertestresultsasverifiedinacommonparttestwithaqualifiedlab(s).3.1.4.1RotaryTestUnit.Themachineshallhaveatestheadforretainingtestfluidandpositioningtheseal(s)onarotatableshaftsupportedbyanexternallymountedspindle.Inaddition,thefollowingconditionsarerequired:3.1.4.1.1Thetestheadsupportmustbesufficientlyrigidtoensureminimumvibration.3.1.4.1.2Equipmentcapableoftestingupto150mmouterdiameter(OD)sealand100mmODshaftdiameter.3.1.4.1.3Itshallbesuitablyconstructedtomaintainpressureandtestfluidlevelrequiredforthetest.3.1.4.1.4Theheadshallbeequippedwithacollectorforleakdetermination.3.1.4.1.5Itshallbeventedtotheatmosphere;thelengthanddiameterofventpipetobeagreeduponbetweentesterandrequester.Runningpressureandvacuumtestwillrequirevalvestoclosetheventpipe.3.1.4.1.6Internalpressurecanbeappliedtotheheadwithgaugingtomonitortheintendedlevel.3.1.4.1.7Thetestheadshallbedesignedandconstructedtomaintainapresetsealborealignmenttothetestshaftaxiswithin±0.05°mmthroughtheoperatingtemperaturerange.3.1.4.1.8Maximumrotationalspeedupto8000r·min-1(8000RPM)3.1.4.1.9Testtemperaturerangeof-40to150°C.3.1.4.1.10Spindle.Thespindlemustbecapableofcyclingand/ormaintainingconstantshaftspeedswithin±50r·min-1(50RPM).Thespindlemustbesufficientlyrigidtomaintainshaftrunoutunderdynamicconditionswithin±0.05°mmupto8000r·min-1(8000RPM).See3.2.3.43.1.4.1.11P