流固耦合的机械搅拌叶片强度分析  

Strength Analysis of Mechanically Agitated Blades with Fluid-Solid Coupling

作　　者：代梦伟 但斌斌[1,2] 牛清勇 欧阳德刚 DAI Meng-wei;DAN Bin-bin;NIU Qing-yong;OUYANG De-gang(Key Laboratory of Metallurgical Equipment and Control Technology,Wuhan University of Science and Technology,Hubei Wuhan 430081,China;Hubei Key Laboratory of Mechanical Transmission and Manufacturing Engineering,Wuhan University of Science and Technology,Hubei Wuhan 430081,China;Research and Development Center of WIS-CO,Hubei Wuhan 430081,China)

机构地区：[1]武汉科技大学冶金装备及其控制教育部重点实验室,湖北武汉430081 [2]武汉科技大学机械传动与制造工程湖北省重点实验室,湖北武汉430081 [3]武汉钢铁有限公司研究院,湖北武汉430081

出　　处：《机械设计与制造》2022年第3期114-117,123,共5页Machinery Design & Manufacture

基　　金：国家自然科学基金项目-基于多场耦合的铁水脱硫搅拌器结构变化机理与设计方法研究(51475340)

摘　　要：为了探究某钢厂三叶螺旋搅拌器在流体状态下搅拌器真实的应力和应变大小,利用软件Fluent和Workbench,采用多重参考系法(MRF),流体体积函数(VOF)和标准的湍流模型对螺旋搅拌器进行单向流固耦合数值模拟,得到搅拌器流场分布特点和静力分析情况。分析发现搅拌槽内最大流速位于搅拌头附近区域的流体,而搅拌槽内流场的速度来源于搅拌头的转动,最大速度值约为1.1 m/s;搅拌器最大压力出现在搅拌器底部区域,最大压力约为2270 Pa;搅拌器最大应力出现在搅拌桨叶根部区域,此处为搅拌桨叶与搅拌轴连接处,容易产生应力集中现象,最大应力约为0.241 MPa;最大形变发生在搅拌头底部区域,由于流体压力较大,磨损比较严重,最大变形量约为0.001517 mm。In order to explore the true stress and strain of the agitator in a steel mill’s three-blade spiral agitator,the software Fluent and Workbench were used to use the multiple reference system(MRF),fluid volume function(VOF) and standard turbulence model.The spiral agitator performs unidirectional fluid-solid coupling numerical simulation to obtain the distribution characteristics and static analysis of the agitator flow field. The analysis found that the maximum flow velocity in the agitation tank is located in the vicinity of the mixing head,and the velocity of the flow field in the agitation tank is derived from the rotation of the agitating head,and the maximum velocity is about 1.1m/s;the maximum pressure of the agitator appears in the bottom region of the agitator.The maximum pressure is about 2270Pa;the maximum stress of the agitator appears in the root region of the agitating blade,where the agitating paddle and the agitating shaft are connected,which is prone to stress concentration.The maximum stress is about 0.241MPa;the maximum deformation occurs in the agitation. In the bottom area of the head,due to the large fluid pressure,the wear is more serious,and the maximum deformation is about 0.001517mm.

关 键 词：螺旋搅拌器 流固耦合 数值模拟 应力 变形 

分 类 号：TH16[机械工程—机械制造及自动化] TF704.3[冶金工程—钢铁冶金]