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GB/T 297-1994 滚动轴承 圆锥滚子轴承 外形尺寸

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基本信息
标准名称:滚动轴承 圆锥滚子轴承 外形尺寸
英文名称:Rolling bearings-Tapered roller bearings-Boundary dimensions
中标分类: 机械 >> 通用零部件 >> 滚动轴承
ICS分类: 机械系统和通用件 >> 轴承 >> 滚动轴承
替代情况:替代GB 297-1984
发布部门: 中国机械工业联合会
发布日期:1994-01-02
实施日期:1995-10-01
首发日期:1964-04-08
作废日期:1900-01-01
主管部门:中国机械工业联合会
提出单位:中华人民共和国机械工业部
归口单位:全国滚动轴承标准化技术委员会
起草单位:机械工业部洛阳轴承研究所
起草人:李飞雪
出版社:中国标准出版社
出版日期:1995-10-01
页数:13页
适用范围

本标准规定了外形尺寸符合GB 273.1《滚动轴承 圆锥滚子轴承 外形尺寸》的单列圆锥滚子轴承的外形尺寸。
本标准适用于单列圆锥滚子轴承。

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所属分类: 机械 通用零部件 滚动轴承 机械系统和通用件 轴承 滚动轴承
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【英文标准名称】:StandardTestMethod(AnalyticalProcedure)forDeterminingTransmissivityofNonleakyConfinedAquifersbyOverdampedWellResponsetoInstantaneousChangeinHead(SlugTests)
【原文标准名称】:顶部瞬时变化的强衰减井响应法测定非渗漏承压含水层的传输率的标准试验方法(分析法)
【标准号】:ASTMD4104-1996(2010)e1
【标准状态】:现行
【国别】:美国
【发布日期】:1996
【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】:D18.21
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:aquifers;aquifertests;controlwells;groundwater;hydraulicconductivity;observationwells;storagecoefficientstorativity;transmissivity;Controlwells;Aquifers;Fieldtesting--groundwater/aquifers;Groundwater;Hydraulicconductivity/tra
【摘要】:AssumptionsofSolutionofCooperetal(1):Theheadchangeinthecontrolwellisinstantaneousattimet=0.Wellisoffinitediameterandfullypenetratestheaquifer.Flowinthenonleakyaquiferisradial.ImplicationsofAssumptions:Themathematicalequationsappliedignoreinertialeffectsandassumethewaterlevelreturnsthestaticlevelinanapproximateexponentialmanner.ThegeometricconfigurationofthewellandaquiferareshowninFig.1.Assumptionsareapplicabletoartesianorconfinedconditionsandfullypenetratingwells.However,thistestmethodiscommonlyappliedtopartiallypenetratingwellsandinunconfinedaquiferswhereitmayprovideestimatesofhydraulicconductivityfortheaquiferintervaladjacenttotheopenintervalofthewellifthehorizontalhydraulicconductivityissignificantlygreaterthantheverticalhydraulicconductivity.AspointedoutbyCooperetal(1)thedeterminationofstoragecoefficientbythistestmethodhasquestionablereliabilitybecauseofthesimilarshapeofthecurves,whereas,thedeterminationoftransmissivityisnotassensitivetochoosingthecorrectcurve.However,thecurveselectedshouldnotimplyastoragecoefficientunrealisticallylargeorsmall.1.1Thistestmethodcoversthedeterminationoftransmissivityfromthemeasurementofforce-free(overdamped)responseofawell-aquifersystemtoasuddenchangeofwaterlevelinawell.Force-freeresponseofwaterlevelinawelltoasuddenchangeinwaterlevelischaracterizedbyrecoverytoinitialwaterlevelinanapproximateexponentialmannerwithnegligibleinertialeffects.1.2TheanalyticalprocedureinthistestmethodisusedinconjunctionwiththefieldprocedureinTestMethodD4044forcollectionoftestdata.1.3Limitations8212;Slugtestsareconsideredtoprovideanestimateoftransmissivity.Althoughtheassumptionsofthistestmethodprescribeafullypenetratingwell(awellopenthroughthefullthicknessoftheaquifer),theslugtestmethodiscommonlyconductedusingapartiallypenetratingwell.Suchapracticemaybeacceptableforapplicationunderconditionsinwhichtheaquiferisstratifiedandhorizontalhydraulicconductivityismuchgreaterthanverticalhydraulicconductivity.Insuchacasethetestwouldbeconsideredtoberepresentativeoftheaveragehydraulicconductivityoftheportionoftheaquiferadjacenttotheopenintervalofthewell.1.4ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:P13
【国际标准分类号】:13_060_10
【页数】:4P.;A4
【正文语种】:英语


MIL-E-5007D (NOTICE 1), MILITARY SPECIFICATION: ENGINE, AIRCRAFT, TURBOJET AND TURBOFAN, GENERAL SPECIFICATION FOR (08 JAN 1997) [NO S/S DOCUMENT]., This notice should be filed in front of MIL-E-5007D, dated 15 October 1973, and Amendment 3, dated 27 December 1995. MIL-E-5007D is inactive for new design and is no longer used, except for replacement purposes.

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