Do you know how unpowered rollers are subjected to forces?

2025-07-10 16:30:12

Unpowered Rollers are a main transportation accessory in conveying equipment, and are cylindrical components that drive the Conveyor belt in an automatic way or change its transportation direction. The main function of unpowered Rollers is to realize the purpose of transporting goods by manually pushing them. They are cylindrical components that drive the conveyor belt or change its running direction manually. They are a type of roller and a main accessory of conveying equipment.

The so-called unpowered rollers do not have their own transmission devices and rely on other equipment for propulsion. Their main role is to reduce friction and achieve the effect of transmission, and they are generally used in assembly lines. Nowadays, the widely used magnetic rollers are rotating or other forms of DC electromagnetic iron removal equipment. They use rubber belts to drive the head pulley matched with the conveyor. They are mainly characterized by continuous and automatic iron removal, deep magnetic field, strong magnetism, and economic practicality.

Originally, unpowered rollers were regarded as a combined component welded by the cylinder, flange, and shaft through assembly. In terms of function, both the tension of the conveyor belt and the torsional force must be transferred to the shaft together, and then transformed into relatively complex internal stresses, which act on each part of the unpowered roller. At the same time, the stress on each component must be different in direction and characteristics. There is a huge difference in the tension on both sides of the conveyor belt of the unpowered roller, and the tension at the impact point is greater than that at the departure point. During operation, the surface of the unpowered roller is under pressure, and its radial load will go from the slack side to the tight side, which also conforms to the exponential law.

Conveyor belt tension, the angle formed by the roller shaft, flange stiffness, cylinder thickness, etc., determine the internal stress. In other words, the internal stress on the cylinder of the unpowered roller is the greatest when the wrap angle of the roller is 60 degrees. The damage of unpowered rollers also manifests under heavy loads. Due to the bending deformation of the shaft, cracks appear at the welding points of the flange and the cylinder shell, hub, and flange.