Based on the closed spiral conveyor within a single material as the research object, this paper carries on the analysis, obtains the granular material parameter design criterion and the formula for calculation and checking, providing the way for selecting and determining semi-enclosed screw conveyor operating parameters and geometric parameters, to be conduce to semi hermetic screw conveyor design and application.% 通过对半封闭螺旋输送机内单颗物料为研究对象进行分析，得出了输送散体物料过程中主要参数设计准则及其计算和校验公式，为半封闭螺旋输送机的工作参数和几何参数的选择和确定提供了方法，有助于半封闭螺旋输送机的设计和应用。
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