Justification of parameters and industrial application of the resilient finger coupling with elastic disc-type element in the four-roll crusher drive

Abstract

Dynamic loads appear in operation of the mechanical equipment leading to parts, assemblies and mechanisms failure reducing the mechanical equipment durability and reliability. Four-roll crushers are widely used in fractional preparation of charge materials in the agglomerate production. Production experience in such machines operation shows that shock loads arising from the material destruction between working surfaces of the rolls are leading to the relatively rapid failure of the crusher drive elements, in particular bearings, gears, gearwheels and couplings unable to completely absorb the dynamic loads. Based on analyzing various couplings, the use of a finger coupling with the elastic disk-type element was justified in the four-roll crusher drive. Such a coupling was able to transmit relatively high torques and to effectively damp significant shock loads that occur during the crusher operation. The method of planning the central composite rotatable uniform of the second order and the finite element method for calculating stresses using a computer-aided design system formed the basis and proposed an analytical expression to determine the torque depending on the hole diameter center for the fingers and the width of an elastic element with certain physical and mechanical properties, as well as the formula for calculating the total width of the disc-type elastic element from the required torque and the diameter of the hole centers for fingers. Values of the design and technological parameters of the finger coupling with the disc-type elastic element were obtained for the process of crushing solid fuel in the DChG 900?700 crusher under conditions of the sintering shop of the Branch No. 1 AMK of YuGMK LLC. Tests and implementation of this type of coupling in industrial conditions were carried out.