Abstract
<jats:p>The reliability of crushing and grinding machines significantly affects their technical and economic efficiency. To improve the reliability indicators of the four-roll crusher DCHG 900×700, it was proposed to use a finger-type coupling with an elastic disc element in the roll drive to transmit torque from the electric motor to the high-speed shaft of the gearbox. Based on the rec-ommended size range, design parameters of the elastic coupling with a nominal torque of 12 kNm were proposed for crushing hard fuel (dry quenching coke) in the DCHG 900×700 crushing machine. Production tests of the upgraded drive were conducted at the agglomeration shop of the Alchevsk Metallurgical Combine, LLC «YUGMK,» which showed that compared to the use of a gear coupling, the probability of failure-free operation by 2,2 times, the mean time between failures increased by1,4 times, and the maintenance frequency decreased by 2,2 times. The study results established that the finger coupling with an elastic disc element, with the recom-mended design parameters, ensures stable operation of the DCHG 900×700 roll crusher during hard material crushing and improves the reliability indicators of the drive.</jats:p>