JB/T 8923-2010 滚动轴承 钢球振动（加速度）技术条件
作者:标准资料网 时间:2024-05-17 16:48:03 浏览:8725
来源:标准资料网
基本信息
| 标准名称： | 滚动轴承 钢球振动（加速度）技术条件 |
| 英文名称： | Rolling bearings-Specifications for vibration (acceleration) of steel balls |
| 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JB/T 8923-1999 |
| 发布部门： | 中华人民共和国工业和信息化部 |
| 发布日期： | 2010-02-11 |
| 实施日期： | 2010-07-01 |
| 首发日期： | |
| 作废日期： | |
| 归口单位： | 全国滚动轴承标委会 |
| 起草单位： | 上海市轴承技术研究所；上海钢球厂 |
| 出版社： | 机械工业出版社 |
| 出版日期： | 2010-07-01 |
适用范围
本标准规定了直径为3mm～30.162mm、公差等级不低于G20并符合GB/T 308-2002规定的球轴承用商品钢球的振动（加速度）的技术要求、测量方法及检验规则。
本标准适用于制造厂和用户对有振动水平要求的商品钢球的检验和验收。
前言
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目录
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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 机械系统和通用件 轴承 滚动轴承
【英文标准名称】:StandardPracticeforConditioningPlasticsforTesting
【原文标准名称】:试验用的塑料调节规程
【标准号】:ASTMD618-2008
【标准状态】:现行
【国别】:美国
【发布日期】:2008
【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】:D20.50
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:
【英文主题词】:conditioning;humidity;plastics;temperature;Atmospheres--conditioning/testing;Conditioning--electricalinsulatingmaterials;Conditioning--plastics;Electricalinsulatingplastics;Relativehumidity(RH);Specimenpreparation(fortesting)--plastic
【摘要】:Conditioningofspecimensistypicallyconducted:(1)forthepurposeofbringingthematerialintoequilibriumwithnormaloraverageroomconditions,(2)simplytoobtainreproducibleresults,regardlessofprevioushistoryofexposure,or(3)tosubjectthematerialtoabnormalconditionsoftemperatureorhumidityinordertopredictitsservicebehavior.Theconditioningproceduresprescribedinthispracticearedesignedtoobtainreproducibleresultsandhavethepotentialtogivephysicalvaluessomewhathigherorsomewhatlowerthanvaluesunderequilibriumatnormalconditions,dependingupontheparticularmaterialandtest.Dependingonthethickness,typeofmaterialanditsprevioushistory,itispossiblethatitwouldtake20to100daysormoretoensuresubstantialequilibriumundernormalconditionsofhumidityandtemperature.Consequently,conditioningforreproducibilitymustofnecessitybeusedforgeneralpurchasespecificationsandproductcontroltests.1.1Ingeneral,thephysicalandelectricalpropertiesofplasticsareinfluencedbytemperatureandrelativehumidityinamannerthatmateriallyaffectstestresults.Inordertomakereliablecomparisonsbetweendifferentmaterialsandbetweendifferentlaboratories,itisnecessarytostandardizethehumidityconditions,aswellasthetemperature,towhichspecimensofthesematerialsaresubjectedpriortoandduringtesting.Thispracticedefinesproceduresforconditioningplastics(althoughnotnecessarilytoequilibrium)priortotesting,andtheconditionsunderwhichtheyshallbetested.1.2Forsomematerials,itispossiblethatamaterialspecificationexiststhatrequirestheuseofthispractice,butwithsomeproceduralmodifications.Thematerialspecificationtakesprecedenceoverthispractice.Refertothematerialspecificationbeforeusingthispractice.Table1inClassificationD4000liststheASTMmaterialspecificationsthatcurrentlyexist.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Note18212;ThisstandardandISO291addressthesamesubjectmatter,butdifferintechnicalcontent.ISO291describesonlytwotemperatureandhumidityconditionsforconditioningortesting,orboth.
【中国标准分类号】:G31
【国际标准分类号】:29_035_20
【页数】:4P.;A4
【正文语种】:英语
【英文标准名称】:Stationarysourceemissions-DeterminationofPM10/PM2,5massconcentrationinfluegas-Measurementatlowconcentrationsbyuseofimpactors
【原文标准名称】:固定源排放.烟气中PM10/PM2.5质量浓度的测定.低浓度下利用撞击计进行测量
【标准号】:BSENISO23210-2009
【标准状态】:现行
【国别】:英国
【发布日期】:2009-08-31
【实施或试行日期】:2009-08-31
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:大气污染;空气质量;浓缩;定义(术语);尘埃;含尘量;粉尘排放;排放;废气;流动;气体;质量浓度;测量;测量技术;颗粒;颗粒物质的测定;固定的
【英文主题词】:Airpollution;Airquality;Concentration;Definitions;Dust;Dustcontents;Dustemissions;Emission;Exhaustgases;Flow;Gases;Massconcentration;Measurement;Measuringtechniques;Particles;Particulatemattermeasurement;Stationary
【摘要】:ThisInternationalStandardspecifiesastandardreferencemethodforthedeterminationofPM10andPM2,5massconcentrationsatstationaryemissionsourcesbyuseoftwo-stageimpactors.Themeasurementmethodisespeciallysuitableformeasurementsofmassconcentrationsbelow40mg/m3ashalf-hourlyaveragesinstandardconditions(273K,1013hPa,drygas).Itisanacceptablemethodforthemeasurementinthefluegasofdifferentinstallations,suchascementandsteelproductionplants,aswellascombustionprocesses.ThisInternationalStandardisnotapplicabletothesamplingoffluegasesthataresaturatedwithwatervapour.ThisInternationalStandardisnotapplicablewherethemajorityoftheparticlesarelikelytoexceedPM10,forexample,inthecaseofrawgasesorplantoperatingfailures.NOTE1Measurementsofparticulateconcentrationshigherthan40mg/m3,asahalf-hourlyaverageinstandardconditions(273K,1013hPa,drygas),canleadtooverloadingofthecollectingplatesandbackupfiltersandalsocouldresultinshortersamplingtimes.NOTE2Thecollectingplatesandbackupfilterscanbeusedforfurtherchemicalanalysis.ThisInternationalStandardcannotbeusedforthedeterminationofthetotalmassconcentrationofdust.NOTE3Fordataassessmentpurposes,itcanbeusefultoperformmeasurementsoftotalparticulatematterinparalleltothePM10andPM2,5measurements.ThisInternationalStandarddescribesthedesign,useandtheoryofround-nozzleimpactors.Itdoesnotexcludeothertypesofimpactors,providedthesesystemsmeettheperformancecriteriaspecifiedinthisInternationalStandardinavalidationoftheimpactorperformedbyanindependenttestinglaboratory.
【中国标准分类号】:Z60
【国际标准分类号】:13_040_40
【页数】:52P.;A4
【正文语种】:英语
