ACTA Scientiarum Polonorum - Silvarum Colendarum Ratio et Industria Lignaria

abstract: The object of the analysis was a Meri Crusher MJS-2.5 DT crushing machine powered by a Valtra T-190 tractor. The crusher was 2500 mm wide and the power of the tractor was 190 HP. During the analysis the quantity of the biomass to be milled and the productivity of the milling operation itself were determined. Based on given technical parameters of the crusher (the rpm of the PTO, number of cutters, diameter of the drum and the driving speed of the tractor), the rpm of working drum, the linear velocity of the cutters, the power and torque of the working drum and the milling productivity were determined. Based on the analysis of working movements of the machine, the forces which occur on the cutters were calculated. It was found that the average force on one cutter was 190 N.