柔性Rushton搅拌桨的振动特性  

Vibration characteristics of the flexible-blade Rushton impeller

作　　者：杨锋苓[1,2,3] 曹明见 张翠勋 刘欣 YANG Fengling;CAO Mingjian;ZHANG Cuixun;LIU Xin(School of Mechanical Engineering,Shandong University,Jinan 250061,Shandong,China;Key Laboratory of High-efficiency and Clean Mechanical Manufacture(Shandong University),Ministry of Education,Jinan 250061,Shandong,China;National Experimental Teaching Demonstration Center of Mechanical Engineering,Shandong University,Jinan 250061,Shandong,China;Shandong Tianli Energy Co.,Ltd.,Jinan 250100,Shandong,China)

机构地区：[1]山东大学机械工程学院,山东济南250061 [2]高效洁净机械制造教育部重点实验室(山东大学),山东济南250061 [3]山东大学机械工程国家级实验教学示范中心,山东济南250061 [4]山东天力能源股份有限公司,山东济南250100

出　　处：《化工学报》2021年第4期1975-1986,共12页CIESC Journal

基　　金：山东省重点研发计划项目(2017GGX70101)。

摘　　要：采用数值模拟的方法分析了课题组前期开发的实验室规模的柔性叶片Rushton搅拌桨的振动特性,并采用丹麦的Brüel&Kj?r及中国的东华振动测试仪进行了实验研究。结果表明,桨轴系统的第1~6阶振型为弯曲型,第7~12阶振型为扭转型。模拟得到的固有频率与实验结果吻合较好,均表明存在集聚现象;与干模态固有频率相比,湿模态固有频率有所降低。承受高频交变激励载荷时,桨轴系统存在明显的应力和应变谐响应。桨轴系统的固有频率随转速的增大而减小,随介质黏度的增大而增大。研究结果为柔性叶片Rushton搅拌桨的放大设计及工业应用奠定了基础。In this paper,vibration characteristics of the bench-scale flexible-blade Rushton impeller developed by our team previously were numerically studied.Experimental measurements using the Denmark Brüel&Kj?r and China Donghua vibration testing instruments were also carried out.It was found that the 1 st to 6 th and the 7 th to12 th-order vibration mode of the flexible-blade impeller and shaft system was the bending and torsional type,respectively.The simulated natural frequencies agree well with the experimental results,both indicate the existence of frequency concentrating phenomenon.Compared with the dry-modal natural frequencies,the wet-modal natural frequencies are decreased.When exerted high-frequency alternating excitation load,there is clear stress and strain harmonic responses.Natural frequency of this system decreases with the increase of impeller rotational speed,and increases with the increase of fluid viscosity.The research results lay the foundation for the enlarged design and industrial application of flexible blade Rushton impeller.

关 键 词：搅拌容器 柔性Rushton搅拌桨 振动特性 数值模拟 实验验证 

分 类 号：TQ027[化学工程]