| 摘要 |
FIELD: technological processes. ^ SUBSTANCE: invention is related to devices for grinding of materials and may be used in mixed fodder, food industry, agriculture, in particular, for grain grinding. Disk mill comprises master and slave disks installed eccentrically relative to each other, grinding surface of disks is arranged with slots located symmetrically relative to each other. Grinding surface of disks consists of internal, medium and external belts with grooves. Medium and external belts are arranged in the same plane parallel to diametral axes of disks, and internal belt - in plane at the angle to them, with permanent width of base H in groove length that corresponds to minimum radius of medium belt, same for slave and master disks, on which bottom of master and slave disk slots is arranged as parallel to diametral axes of disks. Slot sections in plane that is perpendicular to their length are rectangular-shaped with permanent width of base H. Depth of master and slave disk slots starting from medium belt to the slot end varies from h0 to 0, sections of slots in cavity that is perpendicular to their length, have shape of rectangular trapezoid, and front side in direction of master disk slot rotation and back side in direction of slave disk slot rotation are arranged as radial and are equal to height of trapezoid, lower base is equal to width of groove H. Side of rectangular trapezoid of master disk slot, which is back in direction of rotation, and front side in direction of slave disk rotation are inclined to the base at the angle ç, which is equal to ç=180-, where angle is determined based on the following expression: , where ë is angular speed of slave disk rotation, rad/s; H is slot width, m; g is free fall acceleration, m/s2; f is sliding friction coefficient. Depth of slave disk slot in length of internal belt reduces with reduction of slot length from R1 to R0 according to dependence h0 - (R1 - R) tg, where R1 is minimum radius of medium belt; R0 is minimum radius of internal belt; R is current radius (R0<R<R1), m; is angle of internal belt incline to medium one. ^ EFFECT: higher efficiency. ^ 2 dwg |
