Research on hammering characteristics of hammer mill based on discrete element method

Abstract

In hammer mill crushing, the speed change of the rotor hammer head will have an effect on the efficiency of crushing, and so on. This paper takes the hammer mill rotor as the research object and carries out a simulation study, establishes the material particle crushing model, and verifies the validity of the model. The discrete element method (DEM) is used to simulate the movement of the material inside the hammer mill after crushing, revealing that the working principle of the hammer mill is based on the form of particle movement, and to study the law of the particle collision fracture bond energy, compressive stress and particle collision impact energy of the hammer mill. Through comparison, the final working condition of the hammer mill is that at the rotor speed of 1600 r min−1, the working efficiency of the whole equipment is the highest.