Study on feeding performance of screw feeder based on discrete element simulation
A series of screw structures with different screw leads,outer diameters,and head numbers were established by using a modeling software.After the particle model was established and the contact parameters were set in the discrete el-ement numerical simulation software,the conveying process of screw under different structures was simulated.The post-treatment module was used to analyze the force of particles in the conveying process and the mass flow rate at the outlet of the feeder,and the effect of screw structure on the feeding quality was discussed.The results indicated that the screw lead was the main factor affecting the conveying efficiency of the screw feeder.The conveying efficiency of the screw with the 20 mm lead was about 15 times as high as that with the 14mm lead;however,the discharging accuracy was re-duced.The screw clearance is the main factor affecting the force of particles.The decrease of the clearance can lead to an increase in the force of particles.The average force of the screw clearance is about 1.2X10-2 N.The double-headed screw caused the surge of force in the particle conveying process,resulting in a peak value of about 15 N.Meanwhile,the discharge efficiency was reduced,but the discharge stability was improved.
feeding qualityscrew structurediscrete element simulationscrew feeder
万方数据
维普
