The influence of curvature radius of convex and concave section on the belt conveyor
Arch in the middle of the convex belt cross section
The convex section of the belt conveyor often occurs in the middle of the belt section in the direction of the arch, both central protruding. And the belt will be discounted, and the damage degree of the belt will be aggravated after it is folded into the interval of the redirection drum or the driving drum. The main reason for arching and breaking is that the tension value of unit length in the middle and outside of the belt cross section is too different, so that the belt slips to the middle to form arching or breaking. The difference of the tension value per unit length is related to the radius of curvature of the convex segment and the groove Angle of the roller. The larger the groove Angle is, the smaller the curvature radius of the convex segment is, and the more severe the arching and breaking is. When the groove Angle of the belt conveyor is greater than 40 degrees, even in the straight section of the belt conveyor head or tail roller groove Angle transition interval can occur arch and discount, this time should reduce the groove Angle or lengthen the length of the transition interval interval, so that the belt groove Angle slow transition. For the convex belt conveyor, the curvature radius of the convex section should be increased as much as possible and the groove Angle of the roller should be reduced under the premise of satisfying the conveying capacity.
The belt in the convex section is clamped between the flat roll and the oblique roll
The situation that the belt is stuck between the flat roller and the inclined roller of the supporting roller set generally occurs in the mobile bulk transport machinery. Such as loading machine, stacker reclaimer. This phenomenon occurs easily when the cantilever root position of this kind of equipment is under the cantilever. At this time, it is also proportional to the convex section of the belt. Due to the limitation of geometric position and size, it is difficult to meet the size required by the curvature radius of the transition convex section. When the belt is located at the root of the cantilever, if the convex section is formed only through one or two sets of idlers, the belt will be stuck between the flat roll and the oblique roll of the idlers. The solution is to change the convex section formed by the original one or two groups of idlers to four or five groups or more groups.
The concave section springs up and is deflected by the wind when it starts
If there is no material on the belt conveyor at the start of the belt, the belt will bounce in the concave section of the interval, when the wind will blow the belt, therefore, it is best to add pressure belt wheel in the concave section of the belt conveyor to avoid the belt bounce or be blown by the wind.
Post time: Jul-19-2021