Influence of Functional and Construction Parameters Over Sieving Process – Rotary Cylindrical Sieve

Abstract

This paper studied functional parameters: the angle of the shaft section (feed flow rotor) and rotor speed which directly influences the yield of screening with three types of sand (NR1, NC2 and NT3). Experiments was determined following an increase of the values of the shaft angle makes sifting efficiency decrease; the greater the passage section of the material, so the feed rate of the rotor, the efficiency decreases; and a higher rotor speed makes sifting flow to increase with increasing speed. Based on experimental data it was obtained a program that is subject to problem solving regression analysis in which the efficiency is represented as a function of two dependent random variables (speed and angle tilt rotor shaft/rotor speed and power flow rotor/angle tilting spindle and feed rate). The test is a prediction of the values output in certain circumstances depending the two variables. With these predictions decisions can be made for the construction/purchase or for screening.

Optimization of airflow cylinder sieve for threshed rice separation using CFD-DEM

“…Cylinder sieve had been a primarily explored domain, however, too little work has been devoted to the theory of particle screening permeability. Screening theory and influencing factors were explored, Cheng (1988) researched the mixture blockage problem during the screening process of bulk materials; Apostu et al (2015) discussed the effect of the shaft section angle and rotor speed on the efficiency of screening for three types of sand; Siberian scholar Sabashkin et al (2017) invented a cylinder sieve with screw dispenser for grain pre-cleaning, meanwhile discussed the effect of rotating speed and pore size on screening result of mixture; Ivanov et al (2017) from the same team developed a mathematical model of the motion of grain particles for studying the relationship between feed rate and cylinder sieve rotation speed. Most of them have studied the theory of particle screening and the working performance of the cylinder sieve through experimental methods or mathematical model.…”