DISK SECTION OPERATION PARAMETERS AND MODES WHEN WORKING WITH CULTIVATOR AND FLAT-СUTTING HOES
One of the ways to improve the quality of tillage with multifunctioal units is to equip them with replaceable adapters to perform the final technological operations. If there are disk sections in the unit, the installation of various adapters leads to a change in the vertical load on the disks, and the degree of variation directly depends on the type of working bodies of the adapter. At the stage of designing a set of adapters, it is necessary to know the range of parameters and operating modes of the disk section, at which the indicators of the quality of tillage correspond to the area of optimal values. Experimental studies of the influence of the structural and technological parameters of the disk section on the agrotechnical indicators of the quality of tillage during combined work with duck foot cultivators and flat hoes. An experimental plan has been implemented to evaluate the influence of the operating mode and parameters of the disk section, such as the angle of attack α , vertical load N , on the disk section and the distance l between disks on the indicators of the quality of tillage: crumbling, surface ridges, uneven depth of tillage. For conducting experiments, a laboratory-field setup was made, the design of which allows changing the selected parameters within the required limits. The results of the experiment showed that when working with duck feets, it is rational, taking into account the quality of tillage and the design features of the unit, to use a disk section at angles of attack of 18-23º degrees, the distance between disks of 230-280 mm and a ballast weight of 100-120 kg per meter of grip; when operating together with flat-cutting hoes - at angles of attack 20-23˚, disk spacing 270-330 mm and ballast weight 130-160 kg/m. The data obtained make it possible at the design stage to rationally distribute the forces acting on the unit in the longitudinal-vertical plane, and to select the parameters and modes of operation of disk sections and adapters for additional tillage.