高速卧螺离心机动力性能优化  

Dynamic Performance Optimization of High-speed Decanter Centrifuge

作　　者：张志新[1] 王立智[1] 付豫龙 余应明 李振威 

机构地区：[1]浙江大学化学工程与生物工程学院化工机械研究所 [2]海申机电总厂(象山)

出　　处：《化工机械》2015年第5期676-680,共5页Chemical Engineering & Machinery

基　　金：中央高校基本科研业务费专项资金资助项目(2013QNA4033);浙江省重点科技创新团队计划资助项目(2011R50005)

摘　　要：对高速卧螺离心机螺旋-转鼓双转子结构做适当简化,在ANSYS有限元平台上建立有限元模型,计算得到双转子结构的临界转速及其振型。通过分析双转子固有频率随转速的变化,得出陀螺力矩对双转子固有频率的影响很小;通过分析双转子的一阶临界转速与二阶临界转速对应的振型,提出了减小差速器的质量和外伸长度来提高系统的一阶临界转速,增加小端主轴承的刚度来提高二阶临界转速。The decanter centrifuge＇ s screw-drum dual-rotor structure was properly simplified and a finite element model was established with ANSYS to calculate both critical speed of rotation and vibration mode of dual- rotor system. Through analyzing the dual-rotor＇ s natural frequency changing with the speed of variation, the conclusion of gyroscopic torque less influencing the natural frequency can be reached . Through observing the principal vibration mode corresponding to the dual-rotor system＇ s first and second-stage critical speed, lightening the differential mechanism and shortening its length of the extended end to increase the first-stage critical speed of rotation was proposed, including enhancing the little-end bearing＇ s stiffness to raise second-stage critical speed of rotation.

关 键 词：高速卧螺离心机 双转子 固有频率 临界转速 振型 

分 类 号：TQ051.84[化学工程]