Study on Synergistic Optimization of Tooth Profile and Tooth Number of Toothed Roll Crusher based on EDEM-Tavares Model

Abstract

The toothed roll crusher is a key crushing equipment in the fields of mining, metallurgy and other industries, and the rationality of its structural parameters directly affects crushing efficiency, energy consumption and equipment service life. To improve the comprehensive performance of the toothed roll crusher, based on the Discrete Element Method (DEM), the EDEM software was used to construct the Tavares crushing model and Relative wear model for the simulation and optimization research on two key parameters: tooth profile and tooth number. Firstly, in accordance with the process requirements such as output and particle size, the structural parameters of the toothed roll were designed, with a roller diameter of 800 mm, length of 1200 mm, center distance of 845 mm and pitch of 20 mm. Secondly, through EDEM simulation, the wear characteristics and crushing effects of three tooth profiles (eagle beak type, spear type and trapezoidal type) under the same working conditions were compared systematically. The results show that the eagle beak tooth profile has more uniform force distribution and lower wear, and the particle size of the crushed material is mainly concentrated in the range of 15~21 mm, which meets the discharge requirements. Finally, the simulation of tooth number optimization was carried out for the eagle beak tooth profile with five working conditions set, and the analysis was conducted from the aspects of crushing efficiency and particle size distribution. The simulation results indicate that when the tooth number per ring is 45, the crushing efficiency is the highest, the complete crushing time is the shortest, and the proportion of qualified particle size in the crushed products is the largest. This study provides a theoretical basis and simulation support for the structural optimization of toothed roll crushers, and has certain engineering guiding significance for improving equipment efficiency and reducing wear.