Defining key design parameters for separation chamber of fractioning pneumatic seed separator

Abstract

The article studies the separation chamber of the pneumatic seed separator including the definition of its key design parameters and determining the best position of its rotary valve edge during wheat seed sorting. The experiment planning method helped us consider the effects the vertical X (x1) and horizontal Y (x2) positions of the rotary valve edge relative to the inlet edge in the separation chamber wall have on the distribution of grain material components in Fractions II and III. We established that it was possible to obtain Fraction II wheat, consistent with RSC commercial reproduction seed purity category with Fraction I seeds consistent with ES elite seed category and permissible loss levels. The required purity of Fraction II is achieved with the separation chamber minimum length of LR.K = 0.55 m and the rotary valve length of LK = 0.28 m. The separation chamber partition edge with the rotary valve is located 0.40 m away from the inlet edge of the front wall and 0.30 m below its level. The highest purity of Fraction II PII = 98.4% is achieved when the rotary valve edge is set in position х1 = -1 (ХK = 0.25 m) and х2 = -1 (YK = -0.10 m). The highest purity of Fraction III with permissible levels of sound seed loss (Fraction IV) is achieved when the outlet edge in the separation chamber wall is positioned at the same level as the inlet edge (the duster inlet height HV = 0.21 m). The results of the research can be used in the development of pneumatic systems for seed-purifying machines.

Substantiation of the main design parameters of the separation chamber of the pneumatic separator using various methods for calculating particle trajectories in the pneumoseparating channel

“…Исходными данными для расчета (местоположение на выходе из ПСК, значение и направление вектора скорости частиц) являлись сведения, полученные ранее при расчете траекторий частиц в ПСК и его отводе различными методами. Затем было выполнено сравнение расчетных значений конструктивных параметров с результатами экспериментальных исследований разделительной камеры [14].…”