SIMULATION OF THE PROCESS OF INTERACTION WITH THE SOIL OF THE ROTARY HARROW’S ROOFING PINS

Abstract

The subject of the study is the energy intensity of the process of tillage by driven rotary machines with a vertical axis of rotation of the rotors. The tasks included separating the power realized through the tractive effort and through the power take-off shaft (PTO) of the tractor. In addition, the energy consumption of drive and passive working bodies is compared. The study was carried out by modeling the process on the basis of the accepted initial energy intensity of interaction with the plowed soil of the loosening finger at different speeds and in different phases of the rotor rotation. As a result of modeling the process, it was found that the average traction resistance per two rotors with a total working width of 0.8 m does not exceed 54 N. A tillage tool with passive working bodies requires a traction force of about 640 N under the same conditions. That is, the difference is significant, which makes it possible to aggregate a powered rotary harrow with a lighter tractor. At the same time, 94.5% of its capacity should be realized through the PTO. The total power consumed by passive working bodies is 1.5 times less than what a rotary harrow requires to drive. In addition, tools with passive working bodies have a 2-fold higher productivity, which in most cases makes driven soil-cultivating machines uncompetitive compared to them. In this regard, the practical use of vertical rotary tillage machines is limited by a number of specific technological operations, in which the quality of loosening dominates the productivity and cost of work. Such operations include preparing the soil for planting potatoes and caring for the near-shoulder zone on plantations of berry bushes.