DIN 3140 T.1-1978 光学零件的尺寸和公差说明.表示.尺寸标注.材料
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【英文标准名称】:Inscriptionofdimensionsandtolerancesforopticalcomponents;figuration,inscription,material
【原文标准名称】:光学零件的尺寸和公差说明.表示.尺寸标注.材料
【标准号】:DIN3140T.1-1978
【标准状态】:作废
【国别】:
【发布日期】:
【实施或试行日期】:
【发布单位】:德国标准化学会(DE-DIN)
【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】:
【国际标准分类号】:
【页数】:
【正文语种】:
【英文标准名称】:Beltconveyors;Impactringsforcarryingidlersanddiscsforreturnidlers;Maindimensions
【原文标准名称】:带式输送机承载托辊缓冲环和回程托辊圆盘主要尺寸
【标准号】:ISO4123-1979
【标准状态】:现行
【国别】:国际
【发布日期】:1979-02
【实施或试行日期】:
【发布单位】:国际标准化组织(IX-ISO)
【起草单位】:ISO/TC101
【标准类型】:()
【标准水平】:()
【中文主题词】:物料装卸;支承环;轴承滚柱;冲击环;规范;带式输送机;输送带;主要尺寸;环;附件;隔离件;托辊;输送机;尺寸
【英文主题词】:Accessories;Back-uprings;Bearingrollers;Beltconveyors;Conveyorbelts;Conveyors;Dimensions;Impactrings;Maindimensions;Materialshandling;Rings;Spacers;Specifications
【摘要】:Establishesthemaindimensionsofimpactringsforcarryingidlersanddiscsforreturnidlersusedforthevarioustypesofbeltconveyors.
【中国标准分类号】:J81
【国际标准分类号】:53_040_20
【页数】:3P.;A4
【正文语种】:英语
【英文标准名称】:Industrial-processcontrolvalves-Noiseconsiderations-Laboratorymeasurementofnoisegeneratedbyhydrodynamicflowthroughcontrolvalves
【原文标准名称】:工业过程控制阀.噪声的考虑.流动液流经控制阀产生噪声的实验室测量
【标准号】:BSEN60534-8-2-1993
【标准状态】:作废
【国别】:英国
【发布日期】:1991-10-31
【实施或试行日期】:1991-10-31
【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】:声学测量;空气噪声;控制阀;校正装置;定义;方向控制阀;电气工程;流体工程;水力的;流体动力学(水);实验室试验;液体流量;测量;空气噪声测量;噪声排放;噪声测量;管道;过程自动化;过程控制;过程测量和控制技术;声压级;测试;阀门
【英文主题词】:Acousticmeasurement;Airbornenoise;Controlvalves;Correctingunits;Definition;Definitions;Direction-controlvalves;Electricalengineering;Fluidengineering;Hydrodynamic;Hydrodynamics;Laboratorytesting;Laboratorytests;Liquidflow;Measurement;Measurementofairbornenoise;Noiseemissions;Noisemeasurements;Pipelines;Processautomation;Processcontrol;Processmeasuringandcontroltechnology;Soundpressurelevel;Testing;Valves
【摘要】:ThissectionofIEC534-8includesthemethodformeasuringthesoundpressurelevelduetoliquidflowthroughacontrolvalveandthemethod'fordeterminingthecharacteristicincreaseofnoiseduetotheonsetofcavitation.Italsodefinestheequlpment,methodsandproceduresforthelaboratorymeasurementoftheairbornesoundneededtodeterminethesecharacteristics.Theairbornesoundincludesthatradiatedfromthecontrolvalveandtheassociatedpipingconfiguration,íncludingfixedflowrestrictionsthroughwhichthetestfluid(water)ispassing(seenotei).TheprimarypurposeofthissectionofIEC534-8istoprovideamethodfordeterminingthecharacteristicincreaseofnoiseduetocavitation,includingamethodformeasuringnoisegeneratedincontrolvalvesbyhydrodynamicflow.Methodsofmeasuringthenoiseradiatedfromthevalveandassociatedtestpipingallowsacomparisonofvariousmeasureddatawhichisbeneficialtotheuserandthemanufacturer.Thenoisetobemeasuredtakesintoaccountthenoiseradiatedfromthecontrolvalveitselfandthenoisegeneratedbythevalvebutradiatedfromtheassociatedpipingsystem.Thetestdataareexpressedassoundpressurelevelsofthevalveunderconsiderationusingwaterasthetestfluid.DeterminationofsoundpowerlevelsisbeyondthescopeofthissectionofIEC534-8.Thenolsecharacteristicsareusefulforthefollowingreasons:a)todeterminethecharacteristicpressureratiofactorxFzofacontrolvalve;b)topredictvalvenoiseforgivenprocessconditions;c)tocomparetheperformanceofdifferentvalves;d)toplanmeasuresforincreasingsenricelifeandnoiseabatement.
【中国标准分类号】:N16
【国际标准分类号】:23_060_40
【页数】:28P.;A4
【正文语种】:英语
