The article is devoted to the study of the movement of the air flow with grain material in the conical separator of the proposed design, which we offer for the implementation of post-harvest processing of grain. Currently, post-harvest processing is carried out by machines for preliminary, primary and secondary cleaning of grain. All of them work sequentially, and the latter are used optionally in case of grain cleaning for sowing purposes. The authors proposed a new model of air separator. The type of cleaning that this separator will correspond to is still unknown. Therefore, there is an interest in working out a mathematical model in theory. The main attention is paid by the authors to the main design features of the air separator and their purpose, as well as dependencies for determining the necessary design parameters of the air flow. In the pneumatic separator, the authors distinguish several main zones: the suction zone, the discharge zone, the separation zone. The authors analyze the working surfaces of the air separator by type and the effect of their parameters on the air flow. In the course of the work, the authors presented a mathematical model of the movement of the air flow in various areas of the air separator. An analysis of this model is given and interpretations of the formulas included in it are given. Next, the type of air flow in the working chamber of the air separator was determined. Dependences for the air flow velocity are determined and formulas are formulated. The dependences of the air jet deviations from the conical surface of the separator are found and the conditions for determining the final required parameters of the separator are formulated. The results of this article can be applied to the development of new cages with a conical truncated surface and the creation of production samples and models.
conical separator, separation zone, suction zone, injection zone, grain material, light fraction
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