Shevchuk M. Substantiation of the Process of Cereal Crops and Pre-Threshing and Parameters of the Reaper Active Member.

One of the financially attractive activities of the modern agricultural producer is the cultivation and further sale of seeds as sowing material. In Ukraine, more than 3.5 million tons of seeds are consumed annually for sowing cereals and industrial crops, which is 8-10% of the gross grain harvest. The excellence of technical and technological support for grain production systems is determined by the level of grain injury. Due to the low quality of the seed material, caused by significant damage and injury to the seeds under the conditions of its harvesting and initial processing, agrarians increase by 20-25% the rate of sowing compared to the sowing of conditioned seeds. In this regard, the study of the intensification of the process of separation of grain from grain-straw mass (SCM) is very important. This process occurs as a result of the interaction of the AFM and the reaping device of the harvester during the AFM transport phase to the combine threshing and separating system (MCC). Thanks to the development of the device of preliminary threshing of grain the possibility of separation by the working bodies of the reaper up to 32% of grain is established. It should be noted that the pregrounded grain settles (gathers) in the lower part of the process mass and is not damaged by the main threshing drum. Separated grain goes through a lattice-breaker faster, reducing its loss by a thresher.