非轴对称磁场排种元件磁场特性分析及排种性能.pdf

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1、第28卷增刊2902012年10月农业工程学报TransactionsoftheChineseSocietyofAgriculturalEngineeringV01．28Supp．20ct．2012TⅥagneticfieldcharacteristicsanalysisandperf．0rmancetest0f1●●J●J1●J●J●SeedlngelementWltnnon-aXlSVmmetrlCma2netlCLuChuantong，Hu】ianping※，ZhouChunjian，HouChongtKeyLabordtow可

2、M0dernA铲ictllt姗lEq¨ipmentcHtdTechnolo科，Min{stry《Educdnon＆7i矾gstlProv{nce，肋秽“洳fw憎f纱，Z而删胁馏212013，国fH口)Abstract：Traditionalmagneticprecisionseedingelementisasinglecylindricalmagnet，孤ditgeneratesa)【isymmetdcrnagneticfield，mereforethemagneticforcethatthema印eticpowdercoatedse

3、edssuffbredinthesymmetricalpositiollisequal，a11dit’smagneticforcede“ationiszem．Stlldiesshowedmatthiskindofseedmgelementse嬲iIyadsorbedmultipleseedint11esy舢etricalposition，resultingmultipleindexincreased．InordertoiIlcreasettlema辨eticf．orcedeviationbetweenseedsandreduce也em

4、ultipleindexes，thispaperputfon】lrardanewmagneticseedingel锄entwhichwasaddedabiasmagIletinmemainmagnets，pmducingnon-a)【isymmetricmagneticfield．111emagIleticfieldchamcteristicsofthetwohndsofseedingelementwereanalVzedintheseed．metering印acebyusingthememodofthema瓯eticfieldf_m

5、iteelement．Theallalysisshowedthatt11enon．a)‘isyI]【1IIletricmagneticseedingelementcanincreasedthemagneticforcedeviationinthesymmetricalposition．Thecomparisontestsofseed—meteringperfbnnancealsoshowedthatmenon．axisymme仃icma窖meticseedingelementcaIlsignificantlyreducedtllemu

6、ltipleindexandreduced4％comparedwitllmeaxisymmetricmagneticseedingelement．1(eywords：finiteelementmethod，magneticflelds，feedin‰non．axisymmetric，multipleindexesdoi：10．3969／j．issn．1002—6819．2012．z2．016CLCnumber：S223．2+5Documentcode：AArticleID：1002—6819(2012)一SupD．2一0090一06L

7、uChualltong，HuJianpmg，ZhouChunji眦，eta1．Maglleticfieldcharacteristicsatlalysis锄dperfom柚cetestofseedingelementwithnon·a】【isymme仃icmagnetic[J】．Trallsactionsoft11eChineseSocie哆ofA鲥cultL瑚lEngine甜ng(n彻sactionsoftlleCSAE)，2012，28(Supp．2)：90一95．(inEnglishwitllChineseabs缸act)路传同

8、，胡建平，周春健，等．非轴对称磁场排种元件磁场特性分析及排种性能[J]．农业工程学报，2012，28(增刊2)：90—95．0IntroductionTheprecisionseedingisanimportanttre