PLANETARY MILL Russian patent published in 1996 - IPC

FIELD: equipment, applicable in fine grinding of solid materials in mining, construction and other industries. SUBSTANCE: planetary mill has body 1 accommodating drums 4 and rollers 5 and 11, of which one is secured immovably and the other is moveably secured to carrier 7, and means for locking of milling drums. Axle of movable roller 11 is rigidly connected with additional weight 12 that increases the force of pressing of drums 4 to body 1. Made on internal cylindrical surface 3 of body 1 is annular groove 15 and side surfaces if milling drums have annular projections. The distance from bottom 2 of body 1 to annular groove on its internal cylindrical surface is larger than the distance from the drum bottom to annular projections 16 on the side surface. Under the action of centrifugal forces, movable roller 11 shifts and presses milling drums. In so doing, annular projections 16 on drum side surfaces enter annular grooves 15 on cylindrical surface 3 of body 1, and gap formed between bottom 2 of body 1 and the bottom of drums 4 and the drums are automatically locked. EFFECT: higher efficiency. 3 dwg