Abstract

The aim of this study was to determine control parameters of the pneumomechanical peeling machine for grain crops by changing the angular rotational speeds of its main working bodies, a blade disk (rotor) and a deck, to provide optimal dehulling conditions (removing films (outer shells) from the grain. Based on the model representation of the air flow, changes in the magnitude and direction of the grain velocity under the action of the air flow of the opposite direction created by the reversible deck were examined. A mathematical model of grain movement in the working space of a pneumatic mechanical dehuller is presented, which takes into account the real aerodynamics of a rotating air flow, where the dehulling efficiency is determined by the speed and direction of grain flight. The numerical implementation of this model suggests that the value of the grain velocity when hitting the deck is mainly due to the angular rotational speed of the disk and hardly depends on the angular rotational speed of the deck. The direction of the grain velocity during impact is mainly related to the angular rotational speed of the deck and the curvature of the blade at the edge of the disk. This model makes it possible to control the operation of the dehuller, change the angular rotational speeds of the disc and the deck, and affect the direction of impact of the grain against the deck and the magnitude of the impact interaction, thus making it possible to create optimal conditions for dehulling.

中文翻译：

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气动机械去皮机沿工作体的颗粒运动轨迹模拟

摘要

该模型的数值实现表明，撞击甲板时的晶粒速度值主要是由于圆盘的角旋转速度而几乎不取决于甲板的角旋转速度。冲击过程中晶粒速度的方向主要与平台的角旋转速度和磁盘边缘处的叶片曲率有关。该模型可以控制脱壳机的操作，改变圆盘和甲板的角旋转速度，并影响谷物对甲板的撞击方向和撞击相互作用的大小，从而可以为脱壳创造最佳条件。