Melnychuk A. Justification of the design and parameters of a hollow inclined screw conveyor with a rotating casing

The thesis is devoted to theoretical generalization and a new technical solution of the scientific problem, which consists in increasing the efficiency of hollow inclined screw conveyors by developing new designs of screw conveyors with rotating casings and selecting rational operating modes with the formation of conditions conducive to an increase in the axial velocity of material movement. The kinematics of the bulk cargo is studied on the basis of the equations of motion of the extracted volumes of material in a hollow inclined high-speed screw conveyor with a rotating casing. Parametric equations and graphs of the trajectory, speed and acceleration of the cargo movement are obtained, which allow to determine the intensity of material movement and the productivity of the work at the stage of designing the conveyor. The velocities of bulk material in a screw conveyor with a rotating casing in a grapho-analytical method were studied. The character of the load on the working elements of a hollow inclined screw conveyor with a rotating casing has been theoretically and experimentally studied, theoretical and empirical dependences have been derived to determine the productivity and energy parameters when moving the cargo, in particular, the power on the screw drive, the power at the casing drive, the total power on the screw drives and casing, the specific energy consumption of a tilted screw conveyor with a rotating casing, can be widely used in the design of screw conveyors while rotating the casing in a direction opposite to the rotation direction of the screw. According to the results of the research, it is established that an increase in the rotational speed of the casing leads to an increase in the productivity of the screw conveyor by 18-25% compared to its operation with a stationary casing. Also increase of the rotational speed of the casing above 620 rpm. is irrational, because this does not change the performance of the conveyor. The rational rotation speed of the casing is from 480 to 600 rpm, as this results in the greatest increase in the productivity of the screw conveyor.