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SJ 53146/1-2002 DP系列稳速直流电动机详细规范

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基本信息
标准名称:DP系列稳速直流电动机详细规范
英文名称:Motors D.C.stabilized speed series DP detail specification for
中标分类: 电工 >> 旋转电机 >> 直流电机
发布部门:中华人民共和国信息产业部
发布日期:2002-10-30
实施日期:2003-03-01
首发日期:1900-01-01
作废日期:1900-01-01
归口单位:信息产业部电子第四研究所
起草单位:信息产业部电子第四研究所、国营第907厂
起草人:杜洪富、曹群杰
出版社:工业电子出版社
出版日期:2003-02-01
页数:5页
适用范围

本规范规定了DP系列稳速直流电动机的详细要求。
本规范适用DP系列离心式机械稳速直流电动机(以下简称电机)。

前言

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目录

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引用标准

GJB 3146-1998 稳速直流电动机通用规范

所属分类: 电工 旋转电机 直流电机
【英文标准名称】:StandardPracticeforTransferMoldingTestSpecimensofThermosettingCompounds
【原文标准名称】:热固化合物的传递模塑试样的标准实施规程
【标准号】:ASTMD1896/D1896M-2010
【标准状态】:现行
【国别】:美国
【发布日期】:2010
【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】:D20.09
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:
【英文主题词】:testspecimens;thermosettingcompounds;transfer-molding;Molding/extrusioncompounds/materials;Thermosettingplastics
【摘要】:Transfermoldingisparticularlysuitedtothermosettingmaterialsofintermediateplasticity.Fixedmoldingparameterscannotbespecifiedforeachtypeofmaterial.MoldingcompoundsofthesametypecomeinmanydifferentplasticitiesmeasuredinaccordancewithTestMethodsD3123andD3795.Consequently,foragivenmaterialtype,themoldingparametersrequiredtoproducesatisfactorytestspecimenswilloftenvarydependentontheplasticityofthespecificmaterialgrade.Themoldshowninthispracticeprovidesforasetoffivespecimens.However,ifonlycertainspecimensaredesired,theothercavitiescanbeblockedbyinsertinggateblanks.Typically,breathingofthemoldisnotrequiredtoreleasetrappedvolatilematterasthegasisfreetoflowfromtheventendofthemold.Thisisaparticularadvantageforheat-resistantcompoundsandreducesthetendencyformoldedspecimenstoblisterathighexposuretemperatures.Flowandknitlinesinamoldedpieceareoftensitesofmechanicalorelectricalweaknessandcanbefoundinsomedegreeofseveritythroughoutthemoldedpiece.Thesemisolidmoldingcompoundpassingthroughthegateissubjecttonon-Newtonianflowand,consequently,wrinklesandfoldsasittravelsdownthemoldcavity.Fibersandotherreinforcementsinthemoldingcompoundalignwiththeflowpatternand,consequently,canorientperpendiculartotheaxisofthebaratthecenterandparallelatthesurfaceofthebar.Moldtemperature,thermalconductivityandplasticityofthemoldingcompound,degreeofpreheat,andplungerpressureareparametersthatinfluencethetimetofillthemoldcavitiesandtheformationofknitlines.Note38212;Ifthetemperatureofthemoldisheldconstantandtheplungerpressurevariedforadesignatedthermosettingmoldingcompound,twoextremecharacteristicconditionscanbeobtained.Ifthepressureislow,thentheventendofthecavitywillnotfullyfill,andweldlineswillformbyincompleteknittingofthematerial.Ifthepressureistoohigh,themoldcavitywillfillfast,theoutsideofthespecimenwillcasehardenwhilethepressureisstillforcingmaterialoutthevent,andaball-and-socketgrainstructurewillbeobtained.Aball-and-socketstructureisanindicationofthemoldingcondition,andlowertestdatawillresult.Thermosettingcompoundscontaininglong-fiberfillerssuchasglassroving,choppedcloth,orshavingscanbeusedbutarenotrecommendedfortransfermolding.Thesefillermaterialstendtobreak,tear,orballinpassingthroughthegatesofthemold,therebynotoptimizingtheirpotentialstrength.TheIzodimpactstrengthoftransfermoldedspecimensofmoldingcompoundscontainingshortfiberswillgenerallybelowerthanthevaluesobtainedusingcompression-moldingmethods.Quiteoftentheimpactstrengthwillvaryalongtheaxisofthebarduetomoldingparameters,flowpattern,andfiberorientation.Theflexuralandtensilestrengthoftransfermoldedspecimensofmoldingcompoundscontainingshortfiberswillgenerallybehigherthanthevaluesobtainedusingcompression-moldingmethods.Flexuraltestsareparticularlysensitivetotransfermoldingduetothethinresinskinformedatthesurfaceofthebarduringthefinalfillingofthecavityandpressurebuildup.1.1Thispracticecoversageneralprocedureforthetransfermoldingofmechanicalandelectricaltestspecimensofthermosettingmoldingmaterials.Note18212;Theutilityofthispracticehasbeendemonstratedforthemoldingofthermosettingmoldingcompoundsexhib......
【中国标准分类号】:G31
【国际标准分类号】:83_140_99
【页数】:4P.;A4
【正文语种】:英语


【英文标准名称】:Temporaryworksequipment-Part2:Informationonmaterials;GermanversionEN12811-2:2004
【原文标准名称】:临时工作设备.第2部分:材料的信息
【标准号】:DINEN12811-2-2004
【标准状态】:现行
【国别】:德国
【发布日期】:2004-04
【实施或试行日期】:
【发布单位】:德国标准化学会(DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:试验性能;尺寸选定;工作场所安全;职业安全;防腐蚀;材料;规范(验收);材料质量;试验;负荷;钢合金;材料选择;钢;钢的等级;木材;尺寸;元部件;建筑;文献工作;材料规范;建筑用木料;强度等级;额定值;铸铁;脚手架;铝合金;木质
【英文主题词】:
【摘要】:ThisdraftEuropeanStandardonlydealswithcommonlyusedsteel,aluminiumalloys,castiron,timberandtimberbasedmaterials.Italsocoversrequirementsforweldingandforlimitingcorrosionandotherdeterioration.#,,#
【中国标准分类号】:P97
【国际标准分类号】:91_220
【页数】:18P;A4
【正文语种】:德语