Abstract
The paper presents a methodology for determining the volume of a batch of conveyed material located before a transverse partition of a certain height and the distance over which the batch of material extends on the working surface of the conveyor belt along its longitudinal axis. Knowing the geometric dimensions of the transported batch of material makes it possible to appropriately set the spacing of the belt cleats and thereby to optimally determine the conveying performance of the inclined belt conveyor. When the angle of inclination of a conveyor with a straight idler frame is equal to the angle of surcharge of the conveyed material, then no layer of material is carried on the surface of the belt. If the conveyor belt is guided along a trough idler frame, only the lower cross-section of the filling of material is used. An increase in the cross-section of the belt load of a conveyor inclined at an angle, which exceeds the angle of repose of the conveyed material, can be achieved by installing regularly spaced belt cleats around the circumference of the working surface of the endless loop of the conveyor belt. The volume of the batch of material retained by the belt cleat depends on the height and width of the cleat and whether or not the conveyor belt is provided with corrugated side edges. The paper presents theoretically determined relationships that can be used to determine the size of the transverse and longitudinal area and the volume of the batch of material spread on the surface of the conveyor belt in front of the cleat. The experiments performed provide the distances of the material distribution on the surface of the conveyor belt depending on the height of the cleat and the angle of inclination of the conveyor belt.
Highlights
Classic belt conveyors [1,2] are continuously operating machines widely used in industry [3], designed for moving bulk and piece materials up to distances of thousands of meters [4,5,6]
The paper presents a methodology for determining the volume of a batch of conveyed material located before a transverse partition of a certain height and the distance over which the batch of material extends on the working surface of the conveyor belt along its longitudinal axis
A specific construction modification of the conveyor belt consists in the installation of belt cleats (Figure 2b), which are spaced at regular intervals along the entire length of the closed loop of the working surface of the conveyor belt
Summary
Classic belt conveyors [1,2] are continuously operating machines widely used in industry [3], designed for moving bulk and piece materials up to distances of thousands of meters [4,5,6]. The amount of material transported per unit of time [9,10] by continuously operating conveyor equipment, which includes the belt conveyor, is the so-called transport capacity by mass Qm (t·h−1 ) or volume Qv (m3 ·h−1 ) and can be regulated with the conveying speed v (m·s−1 ), the width of the conveyor belt B [m], and the type of idler frame (roller stand). The size of the cross-section of the conveyor belt load S (m2 ) [9] depends on the shape of the conveyor belt loading profile (flat or trough idler frame) [11], the belt loading width b [m], and the angle of repose Θ (deg) of the transported materials.
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