DISK MILL FITTING Russian patent published in 1997 - IPC

FIELD: wood-pulp and paper industry. SUBSTANCE: mill fitting has rotor and stator plates with set of detached sectors equipped by changeable cutting knifes, and each sector is composed by several parts made by powder metallurgy method or fabricated from wear-corrosion-resistant materials. Each part extrusion is made by laying member using made like ribbed sleeves which serve for sectors bolting on rotor and stator plates. Sleeves are made from low-carbon steel unreinforcing by heat treatment and sleeve ribs are made with reversed slope. Each sector has axial protrusion as viewed from side opposite to working one, and plates have axial grooves corresponding to protrusions shapes. In case of some sector parts failure its substituting is possible. EFFECT: higher wearability of mill working members, less mass of changeable parts of construction. 3 cl, 6 dwg