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1、歩駅玨工大哼ANHUIUNIVERSITYOFSCIENCE&TECHNOLOGY規(guī)定閱讀的夕卜文資料原文及譯文學院（部）：材料科學與工程學院專業(yè)班級：礦物加工工程11-2班學號：2011303004學生姓名：王澤陽指導教師：張東晨教授2015年05月27日指導教師評語:評閱人:日期:DynamicsandscreeningcharacteristicsofavibratingscreenwithvariabIeelIipticaItraceHEXiao-mci,LIUChu-shcngAbstract:theidealmotioncharacteristicsforthevibrati
2、ngscreenwaspresented,vibratingscreenwithvariableellipticaltracewasproposed.Anaccuratemechanicalmodelwasconstruetedaccordingtotherequiredstrueturalmotionfcatures.Applyingmulti-degree-of-freedomvibrationtheory,characteristicsofthevibratingscreenwasanalyzed.Kinematicsparametersofthevibratingscreenwh
3、ichmotiontraceswerelinear,circularorellipticalwereobtained.Thestablesolutionsofthedynamicequationsgavethemotionsofthevibratingscreenbymeansofcomputersimulations.Technologicalparametcrs,includingamplitude,movcmentveloeityandthrowingindex,offivespecificpointsalongthescreensurfaceweregainedbytheoret
4、icalcalculation.Theresultsshowthatthetracesofthenewdesignedvibratingscreenfollowtheidealscreeningmotion.Thescreeningefficiencyandprocessingcapacitymaythusbeeffectivelyimproved.Keywords:variableellipticaltrace;screeningprocesswithconstantbedthickness;dynamicmodel;motioncharacteristic;screeningchar
5、acteristics1IntroductionScreeningoperationsareanimportantpartofcoalprocessing.Thevibratingscreenisoneofthemostextensivelyusedscreeningtools.Vibratingscreens,suchaslinearvibratingscreen,circularvibratingscreenorellipticalvibratingscreen,haveasimpletranslationalmotion.Themotionfollowsthesamepatheve
6、rywhereonthescreenandsothescreenhasconstanttransportveloeityandthrowingindex,whichleadstolowscreeningefficiency.Augmentingthethrowingindextoimprovebreakstheexcitingmotorsprocessingcapacitylowerstheworking.Inthispaper,wereportonthedesignofanewvibratingscreenwithvariablemotiontracesthatisbasedonthe
7、principleofscreeningprocesswithconstantbedthickness[3-4].Differentpartsofthevibratingserecntraverscdifferentellipticaltracesandtheresultingmotionagreeswel1withtheidealmotion.Thusthescreenprocessingcapacityandefficiency
