THEORETICAL PRINCIPLES OF PNEUMO-MECHANICAL COMBINATION OF GRANULATION IN TRANSFERRING HAIRY SEED TO MESH SURFACE

Abstract

Pneumo-mechanical seed sorting systems are critical in enhancing the efficiency and precision of separating hairy cotton seeds based on their aerodynamic and mechanical properties. Conventional sorting machines often face limitations in seed permeability and damage control due to inadequate tooth-disc design and feed mechanism parameters. There is a lack of comprehensive theoretical modeling that considers the dynamic movement of hairy seeds along various disc tooth geometries, especially under different angular speeds and bevel angles. This study aims to theoretically analyze the movement of hairy seeds along the surface of toothed discs to determine optimal conditions that minimize mechanical damage and improve transfer efficiency. A differential motion equation was developed to describe seed behavior on the tooth surface, integrating parameters like centrifugal force, tooth inclination, and angular speed. Simulation results showed that at 45–55° bevel angles and 45 rpm disc speed, optimal permeability with minimal damage was achieved. The work presents an original mathematical model describing hairy seed dynamics on rotating toothed surfaces and verifies the results through simulation using Maple software. Findings provide a scientific basis for improving sorting machine design, offering practical insights for engineering optimized feeder components to enhance sorting efficiency and reduce seed damage.