¹A.P. Parpiev, ² I.B. Mardonov, ³Kh.I. Ibrokhimzoda, ⁴F.M. Safarov

Annotation:

This article presents the results of a study addressing the challenge of ensuring a stable seed cotton flow between the saw drum, brush separating drum, spiked-blade drum, and spiked-slat drum of a cleaning unit. Experiments revealed that a portion of the cotton tufts fails to fully enter the subsequent section and instead travels back along the surface of the saw drum. To eliminate this phenomenon, guide elements with a convex working surface were proposed. Based on the direction of seed cotton movement, the distance between drum axes, and the material's trajectory angles, the coordinates, curvilinear profile, and radii of curvature for the guide elements were determined. A parabolic equation and the radius of curvature were derived for the first guide element. The second guide element was manufactured and tested under industrial conditions. The results demonstrated improved guidance of cotton tufts onto the mesh surface, enhanced continuity and stability of the material flow, ensured process reliability, and expanded the cleaner's operational stability—outcomes practically confirmed even at increased throughput rates.

Keywords spike and serrated drums, cleaning efficiency, fine and coarse trash, operating clearance, mesh surface, grate, cleaning section.