Dynamic self-grinder

FIELD: process engineering. SUBSTANCE: invention relates to crushing-and-dressing and construction equipment and may be used in dressing and processing of minerals. Proposed grinder comprises drum with feed openings at its top to accommodate bearing shaft, shaft jacket, gland cover, rotor cup with radial ribs, thrust ring and bearing assemblies. Besides, said grinder incorporates motor, kinematic gearing and safety coupling arranged between motor and rotor cup. Grinder incorporates closing kinematic mechanism composed of bearing shaft, motor shaft with two extensions and kinematic gearing there between. Gear ratios between motor shaft one extension and rotor cup and between motor shaft opposite extension and drum differ. EFFECT: use of circulation circuit power of motor shaft twisting strain as force whereat material is destructed to down power consumption at high efficiency. 3 dwg