Engineering, Energy, Transport AIC

Oleksii KOZACHENKO – Doctor of Technical Sciences, Professor of the Department of Agricultural Machinery and Animal Husbandry Engineering of the State Biotechnology University (63172, Kharkiv, 322/76 Louis Pastera St., e-mail: o.v.kozachenko21@gmail.com, https://orcid. org/0000-0003-1326-4307).

Elchyn ALIIEV – Doctor of Technical Sciences, Senior Researcher, Professor of the Departments of Mechanization of Production Processes in Animal Husbandry of Dnipro State Agrarian and Economic University (St. S. Efremova, 25, Dnipro, Ukraine, 49000, e-mail: aliev@meta.ua, https://orcid.org/0000-0003-4006-8803).

Yevhenii PIKH – recipient of the scientific degree of Doctor of Philosophy at the State Biotechnology University (62459 Kharkiv region, Kharkiv district, Vysoky township, Naukovyi ave., building 12).

The separation process is the most important stage in the preparation of seed material of small-seeded oil crops. It is based on technical-technological principles of separation of seed material, the basis of which is the difference in the physical and mechanical properties of individual components. Such properties include shape, size, mass, specific gravity, surface condition and other properties that characterize the main seed of the crop and impurities.
Since the seed mixture is a polydisperse medium in its physical essence, the theoretical studies were carried out using numerical simulation software packages that contain models of discrete elements.
The goal is to carry out a numerical simulation of the process of preliminary separation of the seed mixture on a screw feeder and to substantiate its rational design parameters.
To carry out numerical simulation of the process of separation of the seed mixture on the vibro-friction separator, the improved physical and mathematical apparatus (1)–(12) of the movement of the particle of the seed mixture component, which is included in the model of the Simcenter Star-CCM+ software package, was used.
As a result of the numerical simulation of the process of preliminary separation of the seed mixture on the screw feeder, a visualization of the process of movement of their main components (seeds of the main crop, weed seeds and plant impurities) from the accepted research factors (step of the turn of the screw plate) was obtained Hf, angle of inclination of the screw plate αf, the radius of the seed injection point rf, angle of rotation of the screw plate θf).
According to the results of the calculation, the regression equations of the second order of the dependence of the radius were obtained rθ from the origin of the coordinates to the point of intersection of the trajectory of the components with a line that is at a certain angle θf rotation of the screw plate, from research factors. As an evaluation criterion, the condition of expanding the distribution zone of the components of the mixture is adopted, which consists in the fact that the radius for the seeds of the main crop rн should be the largest, and the radius for plant impurities rд should be the smallest. By solving the mathematically given condition by the method of function ranking and unification into a single criterion, rational design parameters of the screw feeder of the vibro-friction separator were obtained: Hf = 0,192 m, αf = 14,7 °, rf = 0,014 m, θf = 96,2 °.

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