Experimental Analysis of the Force Stresses on the Protrusions of Profile Conveyor Belts Using a Sensor
Leopold Hrabovský, Lucie Vlčková, Jan Blata, Ladislav Kovář
TL;DR
This study measures forces on conveyor belt protrusions to determine safe transport angles for bulk materials like gravel.
Contribution
The paper experimentally determines the static shear friction coefficients and critical angles for profile conveyor belts.
Findings
The static coefficient of shear friction was 0.33 for plastic and 0.48 for rubber surfaces.
Material can be safely conveyed if the conveyor angle does not exceed the internal friction angle of the bulk material.
River gravel's internal friction angle was determined through experimental data.
Abstract
Profile conveyor belts are used in operational applications where the transport of bulk materials is required at high inclinations on conveyor belts, typically in the range of 30–40°. This paper deals with the analytical determination of the critical angle of inclination of a homogeneous transverse profile (protrusion), beyond which relative movement of bulk material occurs on the surface of the conveyor belt. The compressive forces induced by the known gravity component of the bulk material acting on a 20 mm high transverse protrusion were experimentally measured on a specially designed laboratory apparatus. The measurements were performed at different inclination angles of the folding plate, which simulated the working surface of the conveyor belt. During the experiments, the investigated bulk material—river gravel with a grain size of 4 ÷ 8 mm—was placed in a plastic frame with a…
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Taxonomy
TopicsBelt Conveyor Systems Engineering · Mineral Processing and Grinding · Vibration and Dynamic Analysis