2023年全國碩士研究生考試考研英語一試題真題（含答案詳解+作文范文）_第1頁
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1、Designation:D3336?05(Reapproved2015)StardTestMethodfLifeofLubricatingGreasesinBallBearingsatElevatedTemperatures1ThisstardisissuedunderthefixeddesignationD3336thenumberimmediatelyfollowingthedesignationindicatestheyearof

2、iginaladoptioninthecaseofrevisiontheyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperepsilon()indicatesaneditialchangesincethelastrevisionreapproval.Thisstardhasbeenapprovedfusebyagenciesofth

3、eU.S.DepartmentofDefense.1.Scope1.1Thistestmethodcoverstheevaluationoftheperfmanceoflubricatinggreasesinballbearingsoperatingunderlightloadsathighspeedselevatedtemperatures.1.2Thevaluesstatedininchpoundunitsaretoberegard

4、edasstard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedfinfmationonlyarenotconsideredstard.1.3Thisstarddoesnotpurpttoaddressallofthesafetyconcernsifanyassociatedwithitsuse.Itistheresponsib

5、ilityoftheuserofthisstardtoestablishappropriatesafetyhealthpracticesdeterminetheapplicabilityofregulatylimitationspritouse.Fspecificwarningstatementssee8.1.2.ReferencedDocuments2.1ASTMStards:2A600SpecificationfToolSteelH

6、ighSpeed2.2ABMAStard:3Stard4ToleranceDefinitionsGagingPracticesfBallRollerBearings2.3ASTMAdjuncts:StardBallBearings(setoffive)43.SummaryofTestMethod3.1AgreaselubricatedSAENo.204sizeballbearingisrotatedat10000rminunderlig

7、htloadataspecifiedelevatedtemperature.Testsarecontinueduntilfailurecompletionofaspecifiednumberofhoursofrunningtime.4.SignificanceUse4.1Thistestmethodcanbeusedtoevaluatetheabilityofgreasetoprovideadequatelubricationfexte

8、ndedperiodsofballbearingsoperatingunderlightloadsathighspeedselevatedtemperatures.5.Apparatus565.1TestSpindle7(seeFigs.14)capableofoperatingatspeedsof10000r?mintemperaturesashighas371C(700F).Thetestbearingseatdimensionsh

9、allbe19.99mmto20.00mm(0.7870in.to0.7874in.).Fspindleshavingthetestbearingthesupptbearinginthesamehousing(CRCTypeFigs.13)(Note2)theinternalconstructionofthespindleshallbesuchthattheoutboardsupptbearingbothbearingsarefreet

10、ofloataxiallyinthehousing.Indesignswherebothbearingsarefreetofloatthespindleshaftshallhavea0.508mmto0.762mm(0.020in.to0.030in.)freeaxialmovementendplay.Theoutboardbearingseatdimensionshouldbe19.99mmto20.00mm(0.7870in.to0

11、.7874in.).5.1.1Thetestunitdesign(Fig.1Fig.2)shouldbesuchthatafingerspringwasherproducesa22Nto67N(5lbfto15lbf)thrustloadonthefloatingoutboardsupptbearing.865.2BearingHousing:5.2.1FCRCTypeSpindles—Thebearinghousingdiameter

12、shallbe47.005mmto47.021mm(1.8506in.to1.8512in.)togiveproperbearingmounting.Constructionshallbesuchthatthetestbearingisequippedwithflushspacersshieldstoconfinethegreasetothebearing.Thespacers1Thistestmethodisunderthejuris

13、dictionofASTMCommitteeD02onPetroleumProductsLiquidFuelsLubricantsisthedirectresponsibilityofSubcommitteeD02.G0.05onFunctionalTestsTemperature.CurrenteditionapprovedOct.12015.PublishedDecember2015.iginallyapprovedin1975.L

14、astpreviouseditionapprovedin2010asD3336–05(2010).DOI:10.1520D333605R15.2FreferencedASTMstardsvisittheASTMwebsitewww.astm.gcontactASTMCustomerServiceat.FAnnualBookofASTMStardsvolumeinfmationrefertothestard’sDocumentSummar

15、ypageontheASTMwebsite.3AvailablefromAmericanBearingManufacturersAssoc.2025MSt.NWSte800WashingtonDC20036.4AvailablefromASTMInternationalHeadquarters.derAdjunctNo.ADJD3336.iginaladjunctproducedin1984.5Completeapparatusisav

16、ailablefromFalexCp.1020AirparkDr.SugarGroveIL60554.6IfyouareawareofalternativesupplierspleaseprovidethisinfmationtoASTMInternationalHeadquarters.Yourcommentswillreceivecarefulconsiderationatameetingoftheresponsibletechni

17、calcommittee1whichyoumayattend.7PopeMachineryCpationGreaseTestSpindlesNo.P1911P6301AHT(Fig.1)No.P7605B(Fig.2)FalexCp.spindlesofthetypeshowninFig.1Fig.2havebeenfoundsatisfactyfthispurpose.8Thesolesourceofsupplyoftheappara

18、tusknowntothecommitteeatthistimeisFalexPartNo.643187070FalexCp.1020AirparkDr.SugarGroveIL60554.Copyright?ASTMInternational100BarrHarbDrivePOBoxC700WestConshohockenPA194282959.UnitedStates1endlessbelt.Themotshallbemounted

19、sothatabelttensionofapproximately67N(15lbf)canbemaintainedonthetestspindlepulley.5.4Ovenremovablecapableofproducingatesttemperatureof371C(700F)within11?2h.5.5ControlEquipment:5.5.1Thetemperatureattheoutsidediameterofthet

20、estbearingshallbemaintainedwithin3C(5F)ofthespecifiedtesttemperature.ThetemperaturecontrolequipmentshallbeadequatetomaintainthetemperatureattheouterraceoftheFIG.3TestSpindleThrustLoadDesignFIG.4GIII54GreaseLifeHourstoFai

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