WORKING MECHANISM ANALYSIS AND EXPERIMENTAL STUDY OF GRASS CRUSHER

In order to clarify the working mechanism of forage crusher, the combined cutting and crushing forage crusher was taken as the research object, the mechanical analysis was carried out on the cutting and crushing process of alfalfa stalk, the dynamic model was established, and the relationship between the shear force and the relevant parameters of the cutting mechanism was defined. It was found that the cutting Angle, the installation Angle and the wedge Angle had important effects on the cutting effect and power consumption. The force of alfalfa stem in the grinding chamber is mainly related to the speed of the grinding shaft, the gap between the hammer and the rolling plate. With the output speed of motor, feeding amount, screen diameter and water content as test factors, productivity, silking rate, power consumption and average crushing length as evaluation indicators, the single factor test was carried out to determine the influence of each test factor on the evaluation indicators. The research results can provide reference for the optimization design of grass crusher.