Design and Simulation of Chopping Device of Straw Returning Machine

Abstract

In view of the shortages of straw conveying to one side, knife wear in straw returning machine, a new type of straw chopping and returning device was designed in the paper. On the basis of briefly describing its structure and principle, the type, number and arrangement method of chopping knife were designed, the solid models of the knife and chopping device were built by applying Solidworks, and finite element simulation analyses were carried out based on Simulation, the results showed that the safety factors of the adopted knives were all greater than 1.5, and the stress distribution of the knife shaft was uniform when moving knives were arranged according to the work order of the engine, after comparing with the maximum stress of the knife shaft arranged according to the spiral line, the stress distribution of the knife shaft decreased by 8.84%, which was conducive to extending the service lives of the knife and the knife shaft.