GYRATORY CRUSHER MAIN SHAFT AND ASSEMBLY Russian patent published in 2018 - IPC B02C2/06 

FIELD: materials.

SUBSTANCE: group of inventions refers to devices for crushing materials and can be used in gyratory crushers. Gyratory crusher main shaft comprises a shaft shank having the first end for location in the lower region of the crusher and the second end for mounting in the upper region of the crusher, axial region of the shaft shank, extending from the second end and tapered relative to the longitudinal axis of the shaft shank so that the cross-sectional area of the shaft shank in the tapering region decreases in direction from the first to the second end. Tapered section is designed to be mounted on the shaft of sleeve. At least one groove is formed on the outer surface of the shaft shank, which is located on tapered area and has the ability to receive a pressurised fluid to facilitate mounting and demounting of a sleeve at the shaft. Assembly of the main shaft comprises the above-mentioned shaft shank, established for attachment on tapering area. Thickness of the tapering wall at the second upper end of the sleeve is larger, than thickness of the wall at the first lower end of the sleeve. Gyratory crusher comprises the above-mentioned main shaft or the main shaft assembly.

EFFECT: use of the main shaft or assembly in gyratory crushers increases the ease of use.

14 cl, 4 dwg