反共振离心脱水机隔振橡胶弹簧的动态特性研究
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2020-04-17 09:20:34
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第35卷第6期2010年6月煤炭学报JOURNALOFCHINAC0ALSOCIETYV0l|35No.6June2010文章编号:0253—9993(2010)06—1028—06反共振离心脱水机隔振橡胶弹簧的动态特性研究杨伟红,刘克铭,任兰柱,崔凤录。(1.辽宁工程技术大学机械工程学院,辽宁阜新123000;2.北京科技大学机械工程学院,北京100083;3.中国矿业大学(北京)化学与环境工程学院,北京100083)摘要:为寻求提高反共振离心机工作性能的途径,建立了离心机的动力学模型,给出了对应的幅频特性曲线。通过对离心机橡胶弹簧进行动态特性测试,研究了橡胶弹簧的静刚度特性和动刚度特性。结果表明:随着切向位移增大,橡胶弹簧刚度下降;不同温度下橡胶弹簧的刚度随着压缩量的增加而明显增大;橡胶弹簧预压缩量为3和2mm情况下,刚度变化规律基本一致;在25、32、34、37和4O℃等不同温度条件下,橡胶弹簧的平均刚度变化不显著;在激振力频率不变的情况下,随着作用力的减d、,橡胶弹簧的动刚度增大;在位移不变的情况下,随着频率减小,橡胶弹簧的动刚度减小。关键词:离心脱水机;橡胶弹簧;动态特性;刚度中图分类号:TD462.1文献标志码:AResearchondynamicperformanceofvibrationisolationrubberspringinantiresonancedewateringcentrifugeYANGWei—hong,LIUKe—ming,RENLan.zhu,,CUIFeng—lu(1.SchoolofMechanicalEngineering,LiaoningTechnicalUniveni~,Fuxin123000,China;2.SchoolofMechanicalEngineering,UniversityofSconceandTechnologyBeifing,Beijing100083,China;3.SchoolofChemwal&EnvironmentalEngineering,ChinaUniversityofMiningandTechnology(Be~iing),Bei—jing100083,China)Abstract:Inordertoseekthewaystoimprovetheworkingperformanceofantiresonancedewateringcentrifuge,thedy—namicsmodelofcentrifugewasestablishedandtheamplitude—frequencycurvewaspresented.Basedonthedynamicperformancetestofrubberspringincentrifuge,staticstiffnesscharacteristicsanddynamicstiffnesscharacteristicswerestudied.rheresultsshowthatthestifnessofrubberspringdecreaseswiththeincreaseoftangentialdisplacement:thestiffnessofrubberspringincreasesdistinctlywiththeincreaseofcompressionvolumeatdiferenttemperature;stifnessvariationlawofrubberspringisroughlysamewhenthepre—compressionvolumeisat3and2mm;theaveragestifnessofrubberspringhasnoobviouschangesat25,32,34,37and40℃;thedynamicstifnessofrubberspringincreaseswiththedecreaseoftheappliedforceinthecaseofthesameexcitingforcefrequency;thedynamicstiffnessofrubberspringdecreaseswiththedecreaseofthefrequencyinthecaseofthesamedisplacement.Keywords:dewateringcentrifuge;rubberspring;dynamicperformance;stiffness反共振离心脱水机在选煤厂有着广泛的应用,然而国产的离心机工作稳定性和工作效率不尽如人意,存在着振动参数不稳定、调整频繁、主轴承、弹簧、连接螺栓易损坏等严重问题。目前,所用的离心机主要依靠进口;为了自主开发具有高性
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