APPARATUS AND JET-TYPE GRINDING ROTOR MILLING CHAMBER Russian patent published in 2003 - IPC

FIELD: grinding equipment. SUBSTANCE: milling chamber has casing with two milling sections communicated with one another via tangential channel, breaking member mounted inside tangential channel, rotors positioned in each of said sections and equipped with speeding-up blades fixed on disks, and charging openings formed in upper cover of casing and discharge opening formed in lower cover of casing, centrally of tangential channel. Charging openings are made in the form of nozzles and axially aligned with respective rotors. Additional discharge opening is formed in casing lower cover centrally of tangential channel in axially aligned relationship with discharge opening. Bushing used as breaking member is positioned in additional discharge opening and is made in the form of truncated cone inserted with its smaller diameter into tangential channel. One ends of blades are arranged along outer perimeter of disk and other ends define inner surface having radius at least equal to radius of charging opening. Distance between blade ends along perimeter exceeds distance between blade ends defining inner surface. EFFECT: increased efficiency and simplified construction. 2 cl, 1 dwg