V.A. Sysuev, P.A. Savinykh, A.V. Alyoshkin, V.A. Kazakov
North-East Agricultural Research Institute of Rosselkhozacademy
E-mail: Этот адрес электронной почты защищён от спам-ботов. У вас должен быть включен JavaScript для просмотра.
Summary. Theoretical investigations on grain movement in working zone of first step of flattering and along curvilinear direction blade of two-step grain crusher are conducted in North-East Agricultural research Institute in 2014. Aim of study – estimation of optimum parameters of movement of grain particles in points of input into first and second step of flattering at which maximum productivity of the crusher is reached. Analysis of technological process of obtaining of crushed grain fodder with two-step flattering according to chosen design-technological patter of fodder-making machine is done. Movement of grain is studied at different parts of its trajectory in working zone of crusher with solving of differential equations of second order. Analytical dependence of speed of grain movement V at its movement on curvilinear blade between first and second steps of flattering on angle of turn φ, determined position of grain at the blade and constant of friction of grain on material of blade f is determined. Analysis of numbered and graph values of speed as a result of solving of equation of grain movement along curvilinear blade resulted in conclusion that maximum capacity of second step of flattering as well as whole crusher is reached at minimum drop of speed V of preliminary crushed grain at point of its input into second step of flattering. The condition is reached with construction: inter-arrangement of rollers for flattering which is determined with minimum value of angle α, making with crossing of lines, passing centers of rotation of the rollers: α = 60º +φ02max. The investigations allow to develop two-stage grains crusher on a design stage having minimum power-consuming of working process and maximum capacity for chosen constructive-technological pattern.
Keywords: fractionation, two-stage crushing, grain, roller, trajectory.