Optimum design for sorting section of rice color sorter (part2) - Analysis on ejector nozzle

摘要

The ejector nozzle for the rice color sorter is a device to detect defective grains sliding on the chute by using sensors and blow them off in a moment by the air supplied from the electromagnetic valve which is controlled by signal processing circuits. In this report, the optimum dimensions of the nozzle to meet the sliding speed of grains were determined and the minimum required amount, pressure and blowing time of ejection air were examined. As various factors are related to the nozzle, a prototype nozzle was fabricated according to the calculations based on simulation technique and its suitability was evaluated. Through these experiments, the above-mentioned dimensions, air pressure and air amount were determined.