Application of diametral ventilators in grain and seed cleaning machines: investigation of their aerodynamic configurations.
Sychugov, N. P.; Gataullin, R. G.;
VII Miedzynarodowe Sympozjum Ekologiczne Aspekty Mechanizacji Nawozenia, Ochrony Roslin Uprawy Gleby I Zbioru Roslin Uprawnych, Warszawa, Poland, 18-19 wrzesien 2000 Year: 2000 Pages: 243-249 Ref: 6 ref.
2000
บทคัดย่อ
Post-harvest treatments account for 40-50% of the overall grain production costs. The aerodynamic configurations of a counterflow diametral ventilator and a diametral ventilator with a wedge-shaped channel for grain and seed cleaning are discussed. Both ventilators include identical elements: a pressure branch pipe, a jalousie-type adjacent wall, a case base, a runner with curved blades (both ventilators were manufactured according to the authorship certificate of the USSR No. 1314144, initial configuration). The difference between the two aerodynamic configurations is that a counterflow ventilator has an upper wall created by a curvilinear and rectilinear parts, with the latter being parallel to the adjacent wall and forming with it a suction channel of H depth. The study of the optimum depth of the suction channel in the counterflow ventilator showed that when the length of the back wall is L=0.46 m, the expedient value of the suction channel depth is 0.55-0.67 m. The advantage of the counterf
low ventilator is that forced air flow makes a 360 deg turn in relation to sucked air flow. The investigation of the diametral ventilator with a wedge-shaped channel has shown that the optimum depth of the wedge-shaped channel in the initial cut (in the zone of the source edge of the ventilator case) is 0.05 m.