Determination of the rational number of cutters on the outer cutting drums of Geokhod

Abstract

The issue of substantiation and choice of a rational number of cutters on the outer cutting drums of the geokhod for the formation of grooves in medium strength rocks is considered in this article. It is established that the coefficient of variation of the torque must be taken into account while determining the number of cutters. It is established that the required feed velocities are realized with a crown-type outer cutting drum at one or two cutters in the cutting lines, and the coefficient of torque variation does not exceed 20% at any allowable number of cutters and equal lag angle. On the disktype outer cutting drum required feed velocities are realized with the number of cutters in the cutting lines from 1 to 4. The minimum number of cutters providing a coefficientcient of variation of the torque on the disk-type outer cutting drum above the set depends on the angle of coverage and reduces with the increase of the angle of coverage. The example of schematic designs of OCD AR and OCD EP development is shown for a prototype model of geokhod (3.2 m diameter) using the obtained expressions to determine the basic geometric, kinematic, force, and structural parameters. The possibility of decision making of the type of OCD for geokhod and its creation is confirmed. The documentation design documents for production crown-type OCD for a prototype of geokhod were developed based on the conducted research.