Nesterenko O. Substantiation of the parameters of pneumatic and separating channel with a multi-level inlet of grain material

The object of the research is the process of air separation in a vertical pneumatic separating channel with a multi-level inlet of grain material. The objective of the work is to improve the quality of pneumatic separation by substantiating the parameters of the pneumatic separating channel with a multi-level inlet of grain material. Theoretical studies were carried out using the basic provisions of theoretical mechanics, differential and integral calculus, elements of the theory of probability, mathematical analysis and modeling. In the work the mathematical model of the process of pneumatic separation in the conditions of a multi-level inlet of grain material was developed. That allows determining and quantifying the influence of impurity movement on the grain analytically. Further development of the theory and practice of pneumatic separation of grain materials in the vertical channel was carried out; the mathematical model of contact interaction of impurities with grain was specified which allows assessing the influence on the quality of grain cleaning. For the first time new regularities of separation of grain material in a vertical air flow were obtained in the conditions of its multi-level inlet. Elements of the design of a pneumatic separator with multi-level inlet of grain material are protected by 3 patents of Ukraine on the utility model. A pilot sample of the air separator was tested at three farms of Kirovohrad and Cherkasy regions.