试析叶片式抛送装置气流流场分析及抛送试验研究

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1、内蒙古农业大学硕士学位论文叶片式抛送装置气流流场分析及抛送试验研究姓名：索海霞申请学位级别：硕士专业：农业机械化工程指导教师：王春光20090501撼要时片式抛送装嚣由予艇寄结构麓肇、工作磁攀蛾及制造成举僦游优点，因越广泛塞蓠予落簿爨、豢薅辘窝竣蓑撬等蕊类表蔫蘸撼上。辇蔷畸篾畿超送装嚣存在赫主要瓣憨是受赞大、瓣耩难。婶慧戏拖送装置妻蘩霆疆跨耱辫黼速囊转象撼送物料的，旋转的叶轮肼产生的气流魁影响物料能谢顺利抛出以及叶片式抛送溅霉辑瀵糕功攀憋重要匿豢赫匿瑟，对{母辍祝躐翡浚燎进嚣努辑，巍予设诗器羧遴对籍爨藕蕊熬攀。本文遴潋试验麟究潮撼予FLUENT拨术麴数毯摸拟对时片拭抛送装置气淡流蟋进

2、行了分概，获雩导了气流流场的基本特征。遂避姆气流瀛场试验结果比较装凑；囊溪FLUENT蓑莽瓣叶片蕊戆遴装鬻气滤嚣糕遂嚣模攘分褥懿蕤莱霆菱穗蕊。褥突繁溅，气滚蓑§甥瓣分毒彩镳游辫魏巍送，藏撇送时轮转瀵越高，盘辩巍管盥口截面处的气瀛速艘越大，平均抛邀距离越远。邋过在不阉转速和叶片倾趟下蕊挞邀耀离帮费糕试验，餐懑时片缀煞藩要蘸3臻辩，瓣送躐褰矮遗：鼗彝跨冀瓣舞避琦糕滠李。美毽递；崤片蔽抛送装饕；气流滚蝼；数篷模搂；试验磺究StudyonAirflowAnalysisofanImpeller-BlowerandBlowingExperimentAbstractImpellerblowersa

3、reusedwidelyinalltypesofagriculturalmachinery，suchasshredders，rubbingmachinesandSOon，becauseoftheirsimplicity,reliabilityandlowmanufacturingcost．Atpresent，theyhavesomenegativeproblemsofstockcuttingandloadinginthematerialsblowingprocess．Impellerblowersdependsonthehigh·speedrotatingpaddlestoconve

4、ymaterials．Thefactors，whichmainlyinfluencethepowerconsumptionanddecidewhethermaterialsarethrownoutsmoothly,weretheairflowcausedbythehigh·speedrotatingimpeller．Therefore，theanalysisoftheairflowcarlgivetheoreticalbasistothedesignandimprovementofturbomachine．Inthispaper,theairflowfieldwasanalyzedb

5、ymeansofusingFLUENTnumericalsimulationandexperimenting，andthebasiccharacteristicsabouttheairflowfieldweregained．Comparingsimulationresultswithexperimentalones，itshowedthatthemathematicalmodelwasabletoaccuratelysimulatetheactualairvelocities．Moreover,studyresultsshowedthattheairflowpattemwouldaf

6、fecttheblowingefficiencyandpowerconsumption，andthehighertherotationalspeedoftheimpellerWas，thehighertheairflowvelocityataplaneofthestraw—threwdistanceWas．AccordingtOtheexperimentofthrowingdistanceandpowerconsumptionatdifferentrotationalspeedsandpaddle’Sangels，thepaperdrewtheconclusionsthatasthe

7、backwardangelofpaddleWas3o，thethrowingdistanceWasthefarthestandthepowerconsumptionofradialpaddleWasthelowest．keywords：Impeller-blower，Airflowfield；Numericalsimulation：Experimentstudy插图和图表清单图l切碎的玉米秸秆⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．3图2叶