NOZZLE FOR ROTATING DRUM Russian patent published in 1994 - IPC

FIELD: treating granular material. SUBSTANCE: ribs provided on a cylinder are saw-tooth with teeth oriented in the direction of rotation of the drum when discharging occurs. The teeth are flat from the back side. Surfaces of the rib teeth facing discharging side are located in planes which intersected cylinder axis at an angle close to angle of natural cone of granular material, and surfaces facing charging side are located in planes perpendicular to cylinder axis. Back sides of the ribs are inclined to diametrical planes of the cylinder at an angle which does not exceed the natural cone angle of granular material. Ribs provided on conical bottom from the side of charging are arranged along the cone generatrix and cross-section of the ribs is triangle with an angle at the top no less than 90. Vanes provided on the bottom from the side of discharging are tightly pressed to the bottom along the generatrix in the direction of relief opening and are trapezoidal. Smaller base is arched and the grater one is flat and inclined to diametrical plane at an angle about 45. Relief vanes are interposed between ribs provided on cylindrical part, face inward the cylinder by wide flat ands and are spread at a distance of one or two steps of rib teeth. Adjacent ribs are shifted along the axis of the cylinder relatively each other by half tooth step. EFFECT: expanded functional capability. 7 cl, 5 dwg