NF S30-107-1972 声学术语.音乐

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【英文标准名称】:StandardGuideforInstrumentandPrecisionBearingLubricants-Part2Greases
【原文标准名称】:仪器和精密轴承润滑剂的标准指南.第2部分:润滑脂
【标准号】:ASTMF2489-2006
【标准状态】:现行
【国别】:
【发布日期】:2006
【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】:F34.02
【标准类型】:(Guide)
【标准水平】:()
【中文主题词】:润滑脂;工业用油;仪器;润滑剂;精密轴承
【英文主题词】:ballbearings;esteroil;instrumentandprecisionbearinglubricants;mineraloil;perfluoropolyetheroil;polyalphaolefins;siliconoil;pennzane;thickener;lubricatinggrease
【摘要】:1.1Thisguideisatooltoaidinthechoiceoflubricatinggreaseforprecisionrollingelementbearingapplications.TherecommendationsinthisguidearenotintendedforgeneralpurposebearingapplicationsTherearetwoareaswherethisguideshouldhavethegreatestimpact:(1)whenlubricatinggreaseisbeingchosenforanewbearingapplicationand(2)whengreaseforabearinghastobereplacedbecausetheoriginalgreasespecifiedforthebearingcannolongerbeobtained.TheReport(seeSection)containsaseriesoftestsonawidevarietyofgreasescommonlyusedinbearingapplicationstoallowcomparisonsofthosepropertiesofthegreasethatthecommitteethoughttobemostimportantwhenmakingachoiceoflubricatinggrease.Eachtestwasperformedbythesamelaboratory.Thisguidecontainsalistingofthepropertiesofgreasesbybaseoiltype,thatis,ester,perfluoropolyether(PFPE),polyalphaolefin(PAO),andsoforth.Thisorganizationisnecessarysincetheoperationalrequirementsinaparticularbearingapplicationmaylimitthechoiceofgreasetoaparticularbaseoiltypeandthickenerduetoitstemperaturestability,viscosityindexortemperature-vaporpressurecharacteristics,etc.Theguideprovidesdatatoassisttheuserinselectingreplacementgreasesforthosegreasestestedthatarenolongeravailable.Theguidealsoincludesaglossaryoftermsusedindescribing/discussingthelubricationofprecisionandinstrumentbearings.1.2Thelubricatinggreasespresentedinthisguidearecommonlyusedinprecisionrollingelementbearings(PREB).ThesegreaseswereselectedforthetestingbasedonthegreasesurveyobtainedfromDoD,OEMandgreasemanufacturesandevaluatedaccordingtothetestprotocolthatwasdesignedbySubcommitteeF34onTribology.Thistestprotocolcoverstheessentialrequirementsidentifiedforprecisionbearinggreases.Theperformancerequirementsofthesegreasesareveryunique.Theyaredictatedbytheperformanceexpectationsofprecisionbearingsincludinghighspeed,lownoise,extendedlife,andnocontaminationofsurroundingcomponentsbythebearingslubricantsystem.Toincreasethereliabilityoftestdata,alltestswereperformedbyaDoDlaboratoryandthreeindependenttestinglaboratories.Therewerenogreasemanufacturersdataimportedexceptforbaseoilviscosity.MostoftestswereperformedbyU.S.ArmyTank-AutomotiveResearch,DevelopmentandEngineeringCenter(TARDEC)andthreeindependentlaboratories,andtheresultsweremonitoredbytheNavalResearchLaboratory(NRL).Thiscontinuityoftestingshouldformasolidbasisforcomparingthepropertiesofthemultitudeoflubricatinggreasestestedbyavoidingsomeofthevariabilityintroducedwhengreasesaretestedbydifferentlaboratoriesusingdifferentoreventhe"same"procedures.Additionaltestdatawillbeconsideredforinclusion,providedthedefinedprotocolisfollowedandthetestsareperformedbyindependentlaboratories.1.3ThisstudywasapartofDoDAgingAircraftReplacementProgramandsupportedbyDefenseLogisticAgent(DLA)andDefenseSupplyCenterRichmond(DSCR).1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:E34
【国际标准分类号】:
【页数】:13P.;A4
【正文语种】:


【英文标准名称】:Ultrasoundophthalmicmeasuringsystemfortheaxiallength
【原文标准名称】:轴向长度的超声波眼部测量系统
【标准号】:JIST1205-2005
【标准状态】:现行
【国别】:日本
【发布日期】:2005-03-25
【实施或试行日期】:
【发布单位】:日本工业标准调查会(JP-JISC)
【起草单位】:TechnicalCommitteeonMedicalEquipment
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:この規格は,超音波パルス反射法によって,眼球各部からのエコーの伝ば(播)時間を計測し,眼軸長を求めて表示する超音波眼軸長測定装置(以下,装置という。)について規定する。
【中国标准分类号】:C41
【国际标准分类号】:11_040_70
【页数】:8P;A4
【正文语种】:日语