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ID:235922
大小:257.90 KB
页数:15页
时间:2017-07-11
《变椭圆轨迹振动筛的动力学和筛选特性-毕业论文外文文献翻译》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、DynamicsandscreeningcharacteristicsofavibratingscreenwithvariableellipticaltraceHEXiao-mei,LIUChu-shengSchoolofMechanicalandElectricalEngineering,ChinaUniversityofMining&Technology,Xuzhou,Jiangsu221116,ChinaAbstract:theidealmotioncharacteristicsforthevibratingscreenwaspresented,vibratingscreenwi
2、thvariableellipticaltracewasproposed.Anaccuratemechanicalmodelwasconstructedaccordingtotherequiredstructuralmotionfeatures.Applyingmulti-degree-of-freedomvibrationtheory,characteristicsofthevibratingscreenwasanalyzed.Kinematicsparametersofthevibratingscreenwhichmotiontraceswerelinear,circularore
3、llipticalwereobtained.Thestablesolutionsofthedynamicequationsgavethemotionsofthevibratingscreenbymeansofcomputersimulations.Technologicalparameters,includingamplitude,movementvelocityandthrowingindex,offivespecificpointsalongthescreensurfaceweregainedbytheoreticalcalculation.Theresultsshowthatth
4、etracesofthenewdesignedvibratingscreenfollowtheidealscreeningmotion.Thescreeningefficiencyandprocessingcapacitymaythusbeeffectivelyimproved.Keywords:variableellipticaltrace;screeningprocesswithconstantbedthickness;dynamicmodel;motioncharacteristic;screeningcharacteristics1IntroductionScreeningop
5、erationsareanimportantpartofcoalprocessing.Thevibratingscreenisoneofthemostextensivelyusedscreeningtools.Vibratingscreens,suchaslinearvibratingscreen,circularvibratingscreenorellipticalvibratingscreen,haveasimpletranslationalmotion.Themotionfollowsthesamepatheverywhereonthescreenandsothescreenha
6、sconstanttransportvelocityandthrowingindex,whichleadstolowscreeningefficiency.Augmentingthethrowingindextoimprovebreakstheexcitingmotorsprocessingcapacitylowerstheworking.Inthispaper,wereportonthedesignofanewvibratingscreenwithvariablemotiontracesthatisbasedontheprincipleofscreeningprocesswithco
7、nstantbedthickness[3–4].Differentpartsofthevibratingscreentraversedifferentellipticaltracesandtheresultingmotionagreeswellwiththeidealmotion.Thusthescreenprocessingcapacityandefficiencycanbothbeimproved.2Idealmotionforascree
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