BS EN 2909-1995 镀银的FE-PA92HT(A286)耐热钢制的深承窝的双六角头自锁螺母.等级:1100MPa(室温)/650C°
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【英文标准名称】:Nuts,bihexagonal,self-locking,deepcounterbored,inheatresistingsteelFE-PA92HT(A286),silverplated-Classification:1100MPa(atambienttemperature)/650°C
【原文标准名称】:镀银的FE-PA92HT(A286)耐热钢制的深承窝的双六角头自锁螺母.等级:1100MPa(室温)/650C°
【标准号】:BSEN2909-1995
【标准状态】:现行
【国别】:英国
【发布日期】:1995-11-15
【实施或试行日期】:1995-11-15
【发布单位】:英国标准学会(BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:名称与符号;紧固件;尺寸公差;航空运输工程;钢;飞行器部件;优先尺寸;耐热材料;螺母;作标记;六角头紧固件;防松螺母;尺寸;表面处理
【英文主题词】:
【摘要】:Thisstandardspecifiesthecharacteristicsofself-lockingbihexagonalnutswithdeepcounterbore,inFE-PA92HT,silverplated,foraerospaceapplications.Classification:1100MPa/650℃note:1)Correspondstotheminimumtensilestresswhichthenutisabletowithstandatambienttemperaturewithoutbreakingorcrackingwhentestedwithaboltofahigherstrengthclass.2)Maximumtesttemperatureoftheparts
【中国标准分类号】:J13
【国际标准分类号】:49_030_30
【页数】:12P;A4
【正文语种】:英语
【英文标准名称】:StandardPracticeforConductingFrictionTestsofPistonRingandCylinderLinerMaterialsUnderLubricatedConditions
【原文标准名称】:在润滑条件下进行活塞环和缸衬材料摩擦试验的标准实施规程
【标准号】:ASTMG181-2004(2009)
【标准状态】:现行
【国别】:美国
【发布日期】:2004
【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】:G02.50
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:
【英文主题词】:cylinderliner;dieseloil;friction;liquidlubricant;pistonring;Cylinderlinermaterials;Frictiontests;Lubricatedmaterials/testing;Pistonrings
【摘要】:Theefficiencyandfueleconomyofsparkignitionanddieselenginesisaffectedinparttothefrictionbetweenmovingparts.Althoughnoreliable,insitufrictionmeasurementsexistforfiredinternalcombustionengines,ithasbeenestimatedthatatleasthalfofthefrictionlossesinsuchenginesareduetothoseattheringandlinerinterface.Thispracticeinvolvestheuseofareciprocatingslidingarrangementtosimulatethetypeofoscillatingcontactthatoccursbetweenapistonringanditsmatingcylinderboresurfacenearthetop-dead-centerpositioninthecylinderwheremostseveresurfacecontactconditionsoccur.Therearemanytypesofenginesandengineoperatingenvironments;therefore,toallowtheusertheflexibilitytotailorthistesttoconditionsrepresentativeofvariousengines,apracticeisconsideredmoreappropriatethanastandardtestmethodinwhichspecifictestparametersareprescribed.Variablesthatcanbeadjustedinthisprocedureinclude:normalforce,speedofoscillation,strokelength,durationoftesting,temperatureoftesting,methodofspecimensurfacepreparation,andthematerialsandlubricantstobeevaluated.Guidanceisprovidedhereontheset-upofthetest,themannerofspecimenfixturingandalignment,theselectionofalubricanttosimulateconditionedoilcharacteristics(foradieselengine),andthemeanstorun-intheringspecimenstominimizevariabilityintestresults.Engineoilspendsthemajorityofitsoperatinglifetimeinastatethatisrepresentativeofuse-conditionedoil.Thatis,freshoilischangedbyexposuretotheheat,chemicalenvironment,andconfinementinlubricatedcontact.Itages,changingviscosity,atomicweight,solidscontent,acidity,andchemistry.Conductingpistonringandcylinderlinermaterialevaluationsinfresh,non-conditionedoilisthereforeunrealisticformaterialscreening.Butadditive-depleted,usedoilcanresultinhighwearandcorrosiveattackofengineparts.Thecurrenttestisintendedforusewithlubricantsthatsimulatetribologicalbehaviorafterin-serviceoilconditioning,butprecedingthepointofsevereenginedamage.1.1Thispracticecoversproceduresforconductinglaboratorybench-scalefrictiontestsofmaterials,coatings,andsurfacetreatmentsintendedforuseinpistonringsandcylinderlinersindieselorspark-ignitionengines.Thegoalofthisprocedureistoprovideameansforpreliminary,cost-effectivescreeningorevaluationofcandidateringandlinermaterials.Areciprocatingslidingarrangementisusedtosimulatethecontactthatoccursbetweenapistonringanditsmatinglinernearthetop-dead-centerpositioninthecylinderwhereliquidlubricationisleasteffective,andmostwearisknowntooccur.Specialattentionispaidtospecimenalignment,running-in,andlubricantcondition.1.2Thispracticedoesnotpurporttosimulateallaspectsofafiredenginex2019;soperatingenvironment,butisintendedtoserveasameansforpreliminaryscreeningforassessingthefrictionalcharacteristicsofcandidatepistonringandlinermaterialcombinationsinthepresenceoffluidsthatbehaveasuse-conditionedengineoils.Therefore,itisbeyondthescopeofthispracticetodescribehowonemightestablishcorrelationsbetweenthedescribedtestresultsandthefrictionalcharacteristicsofringsandcylinderborematerialsforspecificenginedesignsoroperatingconditions.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapp......
【中国标准分类号】:J92
【国际标准分类号】:27_020
【页数】:9P.;A4
【正文语种】:英语
【英文标准名称】:Signalmastsforpush-tows,usedinRhineandDanubenavigation
【原文标准名称】:莱因河和多瑙河航行使用的顶推驳船的信号桅杆.
【标准号】:DIN83506-1985
【标准状态】:作废
【国别】:德国
【发布日期】:1985-12
【实施或试行日期】:
【发布单位】:德国标准化学会(DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:货船;材料;造船;顶推系统;内河船舶;驳船;桅杆;内河运输;信号塔;尺寸;定义;规范(审批);设计
【英文主题词】:barges;inlandships;pushedtowsystems;cargoships;specification(approval);shipsmasts;inlandwaterwaytransport;materials;definitions;shipbuilding;design;dimensions;signalmasts
【摘要】:
【中国标准分类号】:U63;R22
【国际标准分类号】:5080
【页数】:8P;A4
【正文语种】:德语
