Selecting the Rotor Shape of a Combined Tillage Machine

The article presents some results of research on the development of a combined tillage machine equipped with a new rotor with a distinctive design from the known rotors. Its advantages in comparison with the known rotor designs are shown. On the developed rotor, each knife during operation describes an individual trajectory of movement, which are offset relative to each other by an equal distance, determined based on the quality requirement of tillage, and as a result, each rotor knife processes a certain area that is parallel offset from the area treated by the previous knife. Initial laboratory tests were done at a depth of 8-10cm, in soil with a moisture content of 12-15 percent and bulk density of1.2-1.4 g/cm 3. The findings demonstrated the decrease to less than 6% of the proportion of soil clods larger than 50 mm, and fuel consumption was decreased by 8-10%, and the index of soil surface evenness was improved by 18% using the proposed rotor compared with conventional rotors. The paper also substantiates the rational values of the radius of the rotor and the length of its blade.