The theoretical substantiation of the roller diameter of a versatile tillage implement

The paper is devoted to a soil compacting implement. To improve the quality of soil cultivation before sowing, a versatile tillage tool has been designed which consists of a frame, loosening and leveling rollers, and rods with springs. The versatility of the implement lies in the fact that it can be used in combination with disc harrows, cultivators, grain seeders and units for the main moldboard or non-moldboard tillage. Theoretical studies have demonstrated that when the hollow cylinder of the roller interacts with a clod of soil, two normal forces N 1 and N 2 arise. The resulting force N = N 1 + N 2 tends to push the soil clod out of the clearance area between the hollow cylinder and the surface of the field in the direction of the positive part of the Ox axis. The friction force F 2 arises between the surfaces of the soil clod and the soil and the force F 1 between the surface of the hollow cylinder and the soil. The resulting frictional force F = F 1 + F 2 is directed opposite the movement direction (rotation) of the leveling roller. Preliminary theoretical calculations showed that the minimum diameter of the hollow cylinder should be at least 0.35 m, and the height of the annular compacting components and pointed rippers should not exceed 6 cm. Then the total outer diameter of the leveling roller will be 0.47 m. It was proven in the course of theoretical studies that the minimum diameter of the hollow cylinder of the leveling roller depends on the quantity h cm of the soil compaction, the maximum size of soil clods left after the pass of the loosening roller, and the physical and mechanical properties of the soil.