| Conveyor belt is a vital component for belt conveyor. The belt can cost more than one third of the total conveyor investment. The belt will emerge deformation in the whole transfer process, such as transition section, convex curved section, concave curved section, horizontal curves section and turnover section and so on. The deformation makes stress in width direction to redistribute. It’s very easy to cause tear in the edge of the belt and wrinkle in the central of belt. Getting the tension distribution in belt width through analysis the belt in transition section and turnover section has a great significance in choicing conveyor belt reasonably, reducing belt coefficient, lowering the cost of the belt conveyor and reducing energy consumption.When analyzing the tension distribution of conveyer belt over the nonuniform stressed section, the conveyor belt between continuous idlers is simplified as orthotropic rectangular plate affected by combined effect of vertical and horizontal load. For the analysis of simple along the trough shapes intersection with the plane of the conveyor belt is divided into three parts, suppose troughed belt of intersecting lines on the cross section of each plane has not been exercising, so deliver the wire as two sheet of fixed boundary; The edge of the conveyor belt without constraint, is the free boundary; Conveyor belt without displacement in the rollers support, without bending moment, can be considered as hinged boundary. The main factors influencing the conveyer belt tension distribution on cross section is at the beginning of the conveyer belt tension caused by stress, due to the geometry deformation produced by the additional bending stress and the stress caused by the conveyor belt under the action of the gravity sag. The maximum deflection of the conveyor belt bending deformation is similar to the thickness of the conveyor belt, applicating the large deflection of plate and shell mechanics to analysis of the non-uniform deformation of sagging bending stress. Using the finite difference method to solve the belt unit bending deformation, the supporting roller of belt is divided into appropriate square grids, the continuous equation discretization numerical solution of differential equation is obtained. The tension distribution in transition section present a trough shapes. The belt’s tension on either side roller present a tiny hollow distribution. The belt’s tension in the middle of the roller presents a small arc distribution. The belt’s tension gets minimum value in the place of the end of the middle roller, decreases22.1%than the average tension. The belt’s tension gets the maximum value in the edge of the belt, increases51.1%than the average tension. In concave curved section, the tension in the conveyor belt in the middle of the roller obtain maximum tension increases34%than the average tension, in the belt edge to obtain the minimum value, decreases58.5%than the average tension. Opposite convex arcs, the tension at the edges to obtain maximum value, increases16.2%than the average tension, obtained in the intermediate roller at the minimum, decreases25.3%than the average tension. Turn in the horizontal curved inner edge of the conveyor belt to obtain the minimum, decreases13.5%than the average tension, the outer edge to obtain the maximum tension, increases21.3%than the average tension. |
PDF Full Text Request