Studiu teoretic al organelor de lucru de tip cuţit-disc ale maşinilor agricole
2016
Melnic, I. (State Agrarian University of Moldova, Chisinau (Republic of Moldova)
Such conservation technologies as No-till, Mini-till, Strip-till etc., suppose the use of agriculturalmachines with rotary cutting units for such cultural practices as preparing the soil for planting, shredding and incorporation of crop residues into the soil and weed control. The paper presents a theoretical study of the operating process of the disc cultivator used for weed control (elaborated by the author) with rotary cutting units (dynamic interaction of the rotary blade with the soil, the effect of friction force between the soil and the disc, the coordinates of soil particle relative to mobile coordinate system when rotation is done by an angle α) andcalculation elements of disc parameters. The main parameter of the developed device is disc diameter (it is chosen depending on the maximum working depth). As a result of the conducted study, we can affirm that the calculated disc diameter (for the working depth of h=0,16m) should be D calc=0,55m. The studied block of rotary blades can be also used in the case of seedling planting machines, seed sowing machines and fertilizer spreading machines.
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