The article presents the results of experimental research of the rotary conical tillage working unit in the soil canal. The authors established a functional dependence of driving force and the rotation speed of the conical working unit from the angles of attack α and inclination to the horizontal level β, as well as the depth of tillage a. The rational value of angles of attack α and inclination of rotation axis to the horizon β was determined, which is providing the minimum driving force or the maximum speed of rotation of working unit. At the same time the extreme points on the tractive effort and the rotational speed are different. Therefore, the rational value of angles α and β can be chosen only as a compromise for different depths of soil treatment are in the following ranges. For а=8 cm: 44 ≤α ≤48, 25 ≤ β ≤28; for а=10 cm: 39 ≤α ≤44, 30 ≤ β ≤31; for а=12 cm: 34 ≤α ≤40, 33 ≤ β ≤37. When operating a conical working unit, we can recommend the following. The angle of inclination of the axis of rotation to the horizontal β and the angle of attack α need to be changed, depending on the processing conditions of the soil. During autumn tillage, you must install the angles α and β to provide the least traction so that to reduce fuel consumption. In spring, when preparing the fields for sowing, in the first place it is placed the quality of the soil, which increases with increasing ω. Therefore, it is necessary to set the angles α and β so, as to maximize the speed of rotation of the working unit.
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