THE TRAJECTORY OF THE RING TILLAGE TOOL WITH THE POWER DRIVE AND LONGITUDINAL AXIS OF ROTATION FOR THE SURFACE TILLAGE OF SOIL

Abstract

Rotary tillage machines are increasingly being used in modern agriculture. Their energy and quality performance indicators are determined by the trajectory of the movement of the tillage tools. In the article are presented the results of a study of the rotary-type ring tillage tool with a longitudinal axis of rotation operating with the power drive. Theoretical studies were carried out using the basic provisions of the kinematics of the rotary tillage tools. Experimental studies were carried out on a laboratory installation in a soil bin. The angle of attack α was 90°, the kinematic coefficient (the ratio of circumferential velocity to translational velocity) varied from 0.8 to 2.2, the angle of inclination β – from 0° to 50°.

According to the results of the research, projections of the trajectory of the point M of the blade of the ring tillage tool for 1 revolution on coordinate planes were obtained, depending on the kinematic coefficient λ and the angle of inclination β from the vertical. An analytical expression is obtained that allows determining the magnitude of the angle γ between the direction of translational motion V_e and the line (tangent) of the trajectory during the period when the blade point of the tillage tool during the period of penetration into the soil, depending on the kinematic coefficient λ and the angle of inclination β from the vertical. The dependences of the change of the angle γ from kinematic coefficient λ and the angle of inclination β from the vertical are established. The results obtained theoretically are confirmed by the results of experimental studies.