Zinchenko Andrii, Baiul Kostiantyn, Krot Pavlo, Khudyakov Aleksander, Vashchenko Sergii, Banasiewicz Aleksandra, Wróblewski Adam
Institute of Transport Systems and Technologies, National Academy of Sciences of Ukraine, 49000 Dnipro, Ukraine.
Z.I. Nekrasov Iron and Steel Institute, National Academy of Sciences of Ukraine, 49000 Dnipro, Ukraine.
Materials (Basel). 2021 Nov 7;14(21):6696. doi: 10.3390/ma14216696.
Comparative strength analysis of two popular options of the radial centrifugal fan impeller design used in horizontal conveyor dryer for fine-grained raw materials is presented. Three types of materials for impeller manufacturing-ASTM A36 steel, Hardox 450 steel and aluminium alloy 6061-T6 are considered. The finite element method (FEM) has been used to investigate stresses and deformations of the impeller within the operational speed range. Analysis shows that the better design is the impeller made of Hardox 450 steel with a central disk. Although the maximum stress is slightly higher in the blades slot for central disk fitting for this design option, it has greatly reduced stresses in contact edges with two other disks (by 22-38%) and blades bending deformation (by 51%). For this design, the maximum operational rotation speed is 1135 min-1 according to the yield strength with a 15% safety factor, while for basic design, it is 1225 min-1. The rational choice of material depends on maximum value of the yield stress to density ratio as well as taking into account the operating conditions and required fan performance. Recommendations for manufacturing the centrifugal fan impeller related to chosen material are given.
本文对用于细颗粒原料水平输送干燥机的两种常用径向离心风机叶轮设计方案进行了强度对比分析。考虑了三种用于制造叶轮的材料——ASTM A36钢、Hardox 450钢和铝合金6061-T6。采用有限元方法（FEM）研究了叶轮在工作转速范围内的应力和变形情况。分析表明，较好的设计是采用带中心盘的Hardox 450钢制成的叶轮。尽管该设计方案中用于安装中心盘的叶片槽内的最大应力略高，但它大大降低了与另外两个盘接触边缘处的应力（降低了22%-38%）以及叶片的弯曲变形（降低了51%）。对于该设计，根据屈服强度并考虑15%的安全系数，最大工作转速为1135 min-1，而基础设计的最大工作转速为1225 min-1。材料的合理选择取决于屈服应力与密度之比的最大值，同时要考虑运行条件和所需的风机性能。给出了与所选材料相关的离心风机叶轮制造建议。
