SUBSTANTIATION OF THE STRAW SPREADER PARAMETERS OF COMBINE HARVESTERS
The process of scattering the chopped straw, thrown out from the grinded straw spreader of the combine harvester on the field surface, is considered in the article. The forces acting on a straw culm moving in the air flow, created by the chopper rotor, and its movement equation are described. The association of the grinded straw length and the range of its spreading as well as the entry clearances and the angles of the guide deflector adjustment have been determined. It is found that different rates of air flow in the channels formed by a pair of guide deflectors is to be available. This is due to the fact that the extreme guide deflectors scatter the straw to a greater distance than the central ones and the air flow rate in the extremes deflectors should be higher than in the central ones.