交流电机转子铜端环感应钎焊研究

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1、湖南大学硕士学位论文交流电机转子铜端环感应钎焊研究姓名：曾美扬申请学位级别：硕士专业：材料工程指导教师：张福全;张世和20061001AbstractCopperalloywithhighconductivityandhighstrengthiswidelyusedf．orwindmillgeneratOrandpullingmotorusedfbrelectricexpressIocomotiVetOreachtohighpowerandsmallinsize．Theweldingofendringofalternatin

2、gcurrentmachineandtheconductingbaristhekeytechnologyfbrmanufhcturingofasynchronoustractionmotorwithhighpower．ChinaSouthLocomotiveandROlIingStOckIndustryCorporationhadtakenthissignificativestudyasakeyprojectforthemanufacturingOfaltematingcurrentmachine．Accordingtoth

3、eweldingofendringofaltematingcurrentmachine，theweldingofcoppefandcopperalloyisdescribedinthispaper．Resultsobtainedinthisstudy甜e弱foltows．1．Bythecomparisonofoxyacetylenegasbrazing，inductionbrazingandresistancebrazing，itwasfbundthathigh-qualityweldingjointcouldbeobtai

4、nedbyinductionbrazing，whichalsohadthehighestemciency．2．TheweldingofendringofthehighpOwersynchronoustractionmotoronceandforallusingmedium—frequencyinductionbrazing，whichshowedavarietyofadvantages，suchasshoncircle，lowheataff色ctingofconductingbarandendring，withoutinfl

5、uenceforrotorsheetinsulationandwithhighmechanicalstrengthandhighquality．Thedesignofaninductioncoilwasthekeypointduringintegralweldingofendringinordeftogethighquality．3．BytheinVestigation，inductioncoilswithdiffbrentdimensionweredesignedforlarge·scaleelectricmachineu

6、singmulti—symmetricalinductionbrazing，whichsolvedtheproblemofatractorservesseveralpurposes．4．Appropriateweldingmaterial，electionofsolderingacid，designofweldingheatprocessandcleaningupinnuencedtheweIdingqualitysignificantly．Morethanonehundredmotorrotorshavebeenwelde

7、dusingintegralinductionbrazingofendring，whichjusthavebeenusedsuccessfhllyfortheareasofwindpowergeneration，civilusingandrailwayandsoOn．Itfo王10wsthatthisweldingprocessingisreliableandpracticable，anditissuitedfbrlarge·lotproduction．Keywords：motor；mtorendring；induction

8、brazing；weldingdefectITT插图索引图1．1铜和铜合金主要性能的应用比例⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯2图1．2中国的铜消费结构(1986．1990年平均)⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯3图1．3大型交流电机转子结构图⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯4图2．1火