TO DETERMINING TRACTION RESISTANCE ROTARY ILLAGE TOOL

Abstract

The research was carried out with the aim of theoretically determining the traction resistance of a rotary tillage tool for pre-sowing soil cultivation. When developing theoretical prerequisites, we used the results of previous studies by various authors, as well as a rational formula proposed by Academician V.P. Goryachkin to determine the traction resistance of the plow. The traction resistance Pt of the rotary tillage tool is made up of the traction resistance of the spiral-screw working body ( ) and the traction resistance of the section of ellipsoidal needle discs ( ). In turn, the traction resistance depends on the forces of resistance of the soil to rolling, friction and crushing, the traction resistance consists of the forces of resistance of the soil to friction, cutting and throwing away. According to the final equation, the traction resistance of the rotary tillage tool depends on the design (the gravity of the spiral-screw working body, the diameters of the spiral-screw working body and ellipsoidal needle disks, the angle of inclination of the forming surface of the spiral-screw working body to the soil surface, the number of needles on the ellipsoidal disk , the angle of inclination of the hub of the elliptical needle disc to the axis of rotation, the number of elliptical needle discs in the section), kinematic (translational speed of the implement, cutting speed of the soil, the indicator of the kinematic mode), technological (width of the tool grasp, depth of soil mulching, width of soil shavings, number of needles simultaneously in the soil, the coefficient taking into account the surface roughness of the spiral-screw working body) parameters, as well as the physical, mechanical and technological properties of the soil (density, rolling resistance coefficient, sliding friction coefficient, coefficient of resistivity to cutting, coefficient of volumetric crushing, coefficient of rejection). The resulting expression can be used to determine the traction resistance of similar tillage machines and rotary-type implements