Shevchuk V. Justification of parameters and operating modes needle Beauronne, Dordogne

The thesis is dedicated to improving the quality of soil by improving processes and structures needle harrows angle sharpening needles are subject to change. To achieve the objectives Theoretical and experimental bases of improvement of technological processes of soil Needle harrows; The influence of parameters needles for exploitation and economic utilization of tools; theoretically investigated rolling disc harrows with needles on ground in longitudinal vertical plane and set point speed drives and points of needles and circuits described ends needles; found that while rolling on the ground of any drive axle which is not related to other axes drives traffic to the center will consist of a series of fluctuations up and down; found that the work spent on piercing the soil increases with the number of disks in the machine needles, needle pressure forces on the ground, immersion depth in the soil and needle length rut and with decreasing radius of the disk and the angle between the needles in the disk; The dependence to determine the strength that must be applied to each needle from top to bottom to promote their implementation in the soil and punctures from needles tangent, immersion depth, friction needle with soil. The annual economic impact from the operation of harrows needle needles sharpening angle which 140 amounted to 5451 UAH.