TO THE JUSTIFICATION OF THE ANGULAR VELOCITY OF THE DRUM OF THE CYLINDRICAL INERTIAL SEPARATOR
Introduction. This article deals with theoretical research on justification of angular velocity of cylindrical inertial separator drum with flexible working body with reverse curvature section. It was established by works of many researchers that it is reasonable to use inertial forces to intensify processes of post-milling treatment of grains, in particular their purification. That is why a great number of researches were dedicated to the work of inertial separators, especially cylindrical ones. Object. Separating surface of cylindrical inertial separator. Materials and methods. With existing rigid working bodies these forces are also limiting factors, as at the kinematic mode index K = rw<sup>2</sup>/g 1 the particles are pressed down by the inertial forces. Application of various methods of reducing these disadvantages did not give a significant effect. These disadvantages are completely eliminated in flexible inertial separators with reverse curvature sections. For effective operation of a separator, it is necessary to justify its angular velocity. Theoretically determined the critical angular velocity of the drum ω<sub>cr</sub> = 9 rad/s at which the relative velocity of the particles of the layer is zero, ie the separator stops working. Results and conclusions. Results of theoretical researches are confirmed with results of experimental researches of the flexible inertial separator with a section of a reverse curvature carried out by the author earlier. Optimum angular speed of rotation of a separator drum with a section of backward curvature at which effective its work is achieved is ω≥16.6 rad/s.