JJG 930-1998 基桩动态测量仪
作者:标准资料网 时间:2024-05-16 16:33:22 浏览:8548
来源:标准资料网
基本信息
| 标准名称： | 基桩动态测量仪 |
| 英文名称： | Verification Regulation of Pile Dynamic Measuring Instrument |
| 中标分类： |
综合 >>
计量 >>
力学计量 |
| 发布部门： | 国家质量技术监督局 |
| 发布日期： | 1998-05-14 |
| 实施日期： | 1998-10-01 |
| 首发日期： | |
| 作废日期： | |
| 归口单位： | 全国振动冲击转速计量技术委员会 |
| 起草单位： | 湖北省计量科学研究所、中国计量科学研究院 |
| 起草人： | 于明、徐殷 |
| 出版社： | 中国计量出版社 |
| 出版日期： | 2004-04-22 |
| 页数： | 18页 |
| 书号： | 155026-1125 |
适用范围
本规程适用于新制造、使用中和修理后的基桩动态测量仪的检定。
前言
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目录
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引用标准
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所属分类： 综合 计量 力学计量
【英文标准名称】:Ironandsteel.Highcarbonsteelwirerodderivedfromingots.Macrographicmethodofshowinganddescribingthechemicalheterogeneity.
【原文标准名称】:钢铁产品.由钢锭加工的高碳钢线材.化学杂质显示及描述的低倍检验法
【标准号】:NFA04-113-1984
【标准状态】:作废
【国别】:法国
【发布日期】:1984-12-01
【实施或试行日期】:1984-12-30
【发布单位】:法国标准化协会(FR-AFNOR)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:
【中国标准分类号】:H11
【国际标准分类号】:77_040_99
【页数】:4P.;A4
【正文语种】:其他
【英文标准名称】:StandardTestMethodforEvaluationofAerationResistanceofEngineOilsinDirect-InjectedTurbochargedAutomotiveDieselEngine
【原文标准名称】:直接喷射式涡轮增压汽车柴油发动机用机油的抗混气性能评价的标准试验方法
【标准号】:ASTMD6894-2010
【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】:D02.B0.02
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:aeration;automotive;dieselengine;EOAT;foaming;heavy-duty;HEUI;medium-duty;Aerationresistance;ASTMTestMonitoringCenter(TMC2);Automotiveenginefuels/oils;Dieselenginefueloils;EOAT(engineoilaerationtest);Foaming
【摘要】:Background8212;IntheHEUIfuelsystem,theengineoilfromtheoilsumpnotonlylubricatestheengine,italsosuppliesahigh-pressureoilsystemthattakesoilfromthemaingalleryandpressurizesitupto20.7MPainaplungerpump(seeFig.A1.1).Thisoilisusedtooperateunitinjectorsthat,whenusedincombinationwithintensifiers,increasethefuelinjectionpressureupto145MPa,independentofenginespeed.Theelectroniccontrolspermitvariedinjectiontiminganddurationtoprovideoptimumfueleconomyandemissions.Thissystemmay,however,circulatealltheoilinthesumpinapproximately8s;asaconsequence,aerationoftheoilcanoccurwithsomeengineoils.Internationaldeterminedthat8%oilaerationwasthelimitbeyondwhichengineoperationandperformancewouldbeimpairedinactualservice.Priorto1994,theabilityofanenginelubricanttoresistaerationwasmeasuredbyTestMethodD892.DuringthedevelopmentoftheAPICG-4categoryin1994,however,itwasfoundthatthisbenchtestdidnotcorrelatewithaerationintheInternationalT444Eengine.TheEOATwasdeveloped,therefore,toprovideabettermeasurementoftheabilityofalubricanttoresistaerationduringengineoperation.ThistesthasbeenincludedinAPICG-4,CH-4,andCI-4categoriesforheavy-dutydieselengineoils.Method8212;Thedataobtainedfromtheuseofthistestmethodprovideacomparativeindexoftheaerationresistanceofengineoilsusedinmedium-andheavy-dutytruckdieselengines.Use8212;Thetendencyofengineoilstoaerateindirect-injection,turbochargeddieselenginesisinfluencedbyavarietyoffactors,includingengineoilformulationvariables,oiltemperature,sumpdesignandcapacity,residencetimeoftheoilinthesump,andthedesignofthepressurizedoilsystems.Insomeengine-oil-activatedinjectionsystems,theresidencetimeoftheoilinthesumpisinsufficienttoallowdissipationofaerationfromtheoil.Asaconsequence,aeratedoilcanbecirculatedtotheinjectorintensifiers,adverselyaffectingtheinjectiontimingcharacteristicsandengineoperation.1.1Thistestmethodwasdesignedtoevaluateanengineoil''sresistancetoaerationinautomotivedieselengineservice.ItiscommonlyreferredtoastheEngineOilAerationTest(EOAT).Thetestisconductedusingaspecified7.3L,direct-injection,turbochargeddieselengineonadynamometerteststand.ThistestmethodwasdevelopedasareplacementforTestMethodD892afteritwasdeterminedthatthisbenchtestdidnotcorrelatewithoilaerationinactualservice.TheEOATwasfirstincludedinAPIServiceCategoryCG-4in1995.Note18212;CompaniontestmethodsusedtoevaluateengineoilperformanceforspecificationrequirementsarediscussedinthelatestrevisionofSpecificationD4485.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.2.1Exception8212;WherethereisnodirectSIequivalent,forexample,screwthreads,nationalpipethreads/diameters,andtubingsize.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafety......
【中国标准分类号】:E34
【国际标准分类号】:75_100
【页数】:12P.;A4
【正文语种】:英语
