Determining of limiting angle of inclination of belt conveyor with partitions

Abstract

Currently, due to the the deepening of open at extraction of minerals, steeply inclined conveyors are widely used. One of the common types of steeply inclined belt conveyors is the belt conveyors with partitions. This type of conveyor is mainly used for small-sized loads. Recently, however, they began to be used for bulk loads, including, in addition to small-sized loads, also individual pieces, the maximum size of which is more than 150 mm. According to literary sources, the limiting angle of inclination of the belt conveyor with partitions is in the range from 35º to 60º. However, until now, there are no studies that determine the dependence of the values of the limiting angle of inclination of the belt conveyor with partitions on the parameters of the conveyor, the size of the partitions and the properties of the transported load. In this work, based on the laws of the statics of a granular medium, the limiting angle of inclination of the belt conveyor with partitions is determined depending on the linear load of the transported bulk load, the height of the partition and the distance between them, as well as the slope angle of the bulk load. Two cases were considered in the work: the case when the bulk load between the partitions covers the entire conveyor belt, and the case when the bulk load covers part of the conveyor belt. As a result, it was found that in the first case, the tangent of the limiting angle of inclination of the belt conveyor with partitions decreases linearly with increasing linear load, and in the second case, when the bulk load does not completely cover the conveyor belt, the tangent of the limiting angle of inclination of the belt conveyor decreases with increasing linear load according to the hyperbolic law. At the same time, with an increase in the height of the partition, the limiting angle of inclination of the belt conveyor increases. In addition, the dependences of the volumetric productivity of a belt conveyor with partitions on the limiting angle of inclination of the conveyor were obtained. At the same time, with an increase in the limiting angle of inclination of the belt conveyor, the productivity of the conveyor decreases, and with an increase in the height of the partition, it increases. The research results can be when at designing belt conveyor with partitions on the belt, for transporting bulk loads.