EXPERIMENTAL STUDY ON THE PERFORMANCE OF CORN STALK CRUSHING DEVICE WITH STEPPED SAW DISK KNIFE

Responding to the problem of over-returning of corn stalk to the field, this article proposes a comprehensive utilization model that returns 30% of corn stalk to the field from above the surface and recycles the remaining 70% as fodder is proposed. For the problems of poor quality of stalk crushing and fast knife wear, the experimental platform for corn stalk crushing with vertical shaft stepped saw disc knife was designed. The effects of different factors on the qualified rate of stalk cutting length and cutting power were investigated. The qualified rate of cutting length was the best 96.57% when the plant spacing was 20 cm. The cutting power was the smallest 322.94 W when the rotational speed of knife roller was 600 r/min. The stalk crushing process was analysed by high-speed camera, and the stalk crushing mechanism was clarified.