Study on universal blade rotor for rototilling and stubble-breaking machine

We have developed a dual-functional machine which can perform both rototilling and stubble-breaking operations. This machine is characterized by a universal rotor and blade mounting disc mechanism, thus the two operations are performed, respectively, by simple change of the blades. In this paper we present the analysis of the main parameters of the rototilling and stubble-breaking working parts and their effect on the operation quality on the basis of different agrotechnical requirements. We also present the designing considerations of the universal blade mounting system to ensure that both blades can be mounted in multi-spiral arrangements without interference. Field tests show that this dual-functional machine meets the agrotechnical requirements in the northeast of China and possesses several advantages compared with existing machines.