粉末螺旋输送机的设计及有限元分析

Design and Finite Element Analysis of Pow-der Screw Conveyor

摘要: 针对粉末螺旋输送机输送性能差、使用寿命低等问题，以氢氧化锂粉末为输送物料，对粉末螺旋输送机进行了整体结构设计。首先，本文以输送螺杆为关键零部件，将出料口位置的螺杆设计成无螺旋叶片，根据实际生产输送要求以及氢氧化锂粉末特性，确定了输送螺杆的参数数值；然后，采用有限元分析法对输送螺杆进行了强度和刚度分析，验证了输送螺杆结构参数设计的合理性，研究了输送螺杆叶片厚度对应力和变形的影响规律。其中应力最大值发生在输送螺杆叶片的根部位置处，而最大变形发生在输送螺杆的叶片外缘；随着螺旋叶片厚度的增加，输送螺杆的最大等效应力、总变形在逐渐减小，为输送螺杆的设计提供了一定的参考。

Abstract: In response to the problems of poor conveying performance and low service life of powder screw conveyor, the overall structure design of powder screw conveyor is carried out with lithium hy-droxide powder as the conveying material. First of all, this paper takes the conveying screw as the key component, and designs the screw at the outlet position without screw blade. According to the actual production conveying requirements and the characteristics of lithium hydroxide powder, the parameter values of the conveying screw were determined. Then, the strength and stiffness of the conveying screw were analyzed by finite element analysis to verify the rationality of the design of the conveying screw structure parameters. The effect of conveying screw blade thickness on stress and deformation was studied. The maximum stress occurs at the root of the conveyor screw blade, while the maximum deformation occurs at the outer edge of the blade of the conveyor screw. As the thickness of the screw blade increases, the maximum equivalent force and total deformation of the conveying screw gradually decreases, which provides a certain reference for the design of the con-veying screw.