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工程科学与技术:2015,47(6):191-197
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离心机锥形转鼓与法兰连接处接应力的有限元分析
(四川大学化工学院)
FEM analysis of stresses at the joint area between the conical bowl and the flange of a centrifuge
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投稿时间:2015-04-08    修订日期:2015-07-13
中文摘要: 碟片式离心机和螺旋卸料式离心机锥形转鼓和法兰连处会产生边缘应力。运用有限元分析方法,采用无量纲理论对锥形转鼓和法兰连接处的应力进行分析。通过定义三个无因次量:边缘处应力系数β1、边缘处峰值应力系数β2和厚度系数α。考察α、螺栓预紧力、圆角半径、物料密度、液池深度、转速和半锥角等参数的变化对β1和β2的影响。研究结果表明:β2随着α、圆角半径和半锥角的增大而减小,随着螺栓预紧力、物料密度以及液池深度的增加而增大,几乎不受转速变化的影响;β1随着α和半锥角的增大而减小,随着物料密度和液池深度的增加而增大,而受圆角半径、转速以及预紧力变化的影响不明显。给出了离心机锥形转鼓与法兰连接处有关应力系数β1和β2计算的数据图并进行了举例计算,为工程实际中的锥形转鼓计算提供了有价值的计算依据。
Abstract:An additional stress, called edge stress, may be generated at the joint area between the conical bowl and the flange of a centrifuge. The equivalent stress at the joint was quantitatively analyzed from dimensionless theory in terms of the finite element analysis method (FEM). Three dimensionless parameters were defined for the joint between a flange and a conical bowl. One was the edge stress coefficient β1, the second was the edge peak stress coefficient β2 and the last was the thickness coefficient α. The effects of α value, bolt pre-tightening force, fillet radius, slurry density, the depth of liquid pool, rotation speed and semi-cone angle on β1 and β2 were investigated. The results showed that β2 reduced when α, fillet radius or semi-cone angle increased and increased when bolt pre-tightening force, slurry density or the depth of liquid pool increased. The influence of rotation speed on β2 was not obvious. When α or semi-cone angle reduced and slurry density or the depth of liquid pool increased, β1 value increased. The influence of fillet radius, rotation speed or bolt pre-tightening force to β1 is not apparent. Finally,the data for calculating the equivalent stresses at the joint area between the conical bowl and the flange of a given centrifuge bowl were presented and an example was used to illustrate the calculation method,which would provide valuable information for designing the centrifuge bowl in engineering practice.
文章编号:201500320     中图分类号:    文献标志码:
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Author NameAffiliationE-mail
Li Jianming  lijianming@scu.edu.cn 
Xue Xiaoping   
Tang Zonghong   
作者简介:
引用文本:
李建明,薛小平,唐宗红.离心机锥形转鼓与法兰连接处接应力的有限元分析[J].工程科学与技术,2015,47(6):191-197.
Li Jianming,Xue Xiaoping,Tang Zonghong.FEM analysis of stresses at the joint area between the conical bowl and the flange of a centrifuge[J].Advanced Engineering Sciences,2015,47(6):191-197.