基本信息
| 标准名称： | 滚动轴承 清洁度及评定方法 |
| 中标分类： |
机械 >>
通用零部件 >>
滚动轴承 |
| 替代情况： | 被JB/T 7050-2005代替 |
| 发布日期： | 1993-09-23 |
| 实施日期： | 1994-07-01 |
| 首发日期： | 1900-01-01 |
| 作废日期： | 2005-11-01 |
| 出版日期： | 1900-01-01 |
| 页数： | 8页 |
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前言
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引用标准
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所属分类： 机械 通用零部件 滚动轴承
【英文标准名称】:StandardTestMethodforEvaluatingLubricityofDieselFuelsbytheHigh-FrequencyReciprocatingRig(HFRR)
【原文标准名称】:利用高频往复设备(HFRR)评价柴油燃料润滑性的标准试验方法
【标准号】:ASTMD6079-2004e1
【标准状态】:现行
【国别】:
【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】:D02.E0.02
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:磨损;润滑工程;润滑;柴油;摩擦;试验;机动车工程
【英文主题词】:boundarylubrication;dieselfuel;friction;lubricity;wear
【摘要】:Dieselfuelinjectionequipmenthassomerelianceonlubricatingpropertiesofthedieselfuel.Shortenedlifeofenginecomponents,suchasdieselfuelinjectionpumpsandinjectors,hassometimesbeenascribedtolackoflubricityinadieselfuel.ThetrendofHFRRtestresultstodieselinjectionsystempumpcomponentdistressduetowearhasbeendemonstratedinpumprigtestsforsomefuel/hardwarecombinationswhereboundarylubricationisbelievedtobeafactorintheoperationofthecomponent.5ThewearscargeneratedintheHFRRtestissensitivetocontaminationofthefluidsandtestmaterialsandthetemperatureofthetest.Lubricityevaluationsarealsosensitivetotracecontaminantsacquiredduringtestfuelsamplingandstorage.TheHFRRandScuffingLoadBallonCylinderLubricityEvaluator(SLBOCLE,TestMethodD6078)aretwomethodsforevaluatingdieselfuellubricity.Noabsolutecorrelationhasbeendevelopedbetweenthetwotestmethods.TheHFRRmaybeusedtoevaluatetherelativeeffectivenessofdieselfuelsforpreventingwearundertheprescribedtestconditions.CorrelationofHFRRtestresultswithfieldperformanceofdieselfuelinjectionsystemshasnotyetbeendetermined.Thistestmethodisdesignedtoevaluateboundarylubricationproperties.Whileviscosityeffectsonlubricityinthistestmethodarenottotallyeliminated,theyareminimized.1.1Thistestmethodcoverstheevaluationofthelubricityofdieselfuelsusingahigh-frequencyreciprocatingrig(HFRR).1.2Thistestmethodisapplicabletomiddledistillatefuels,suchasGradesLowSulfurNo.1D,LowSulfurNo.2D,No.1D,andNo.2Ddieselfuels,inaccordancewithSpecificationD975;andothersimilarpetroleum-basedfuelswhichcanbeusedindieselenginesNote1Itisnotknownthatthistestmethodwillpredicttheperformanceofalladditive/fuelcombinations.Additionalworkisunderwaytofurtherestablishthiscorrelationandfuturerevisionsofthistestmethodmaybenecessaryoncethisworkiscomplete.1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicableregulatorylimitationspriortouse.SpecificwarningstatementsaregiveninSection.
【中国标准分类号】:E31
【国际标准分类号】:75_160_20
【页数】:5P.;A4
【正文语种】: