The roller is an important part of the belt conveyor, with many types and large quantities. It accounts for 35% of the total cost of a belt conveyor and bears more than 70% of the resistance, so the quality of the roller is particularly important.

The function is to support the weight of the conveyor belt and the material. The idler is flexible and reliable. It reduces the friction between the conveyor belt and the idler, and plays a key role in the life of the conveyor belt, which accounts for more than 25% of the total cost of the conveyor. Although the idler is on the belt The conveyor is a small part, and the structure is not complicated, but the manufacturing roller is not easy.

The criteria for judging the quality of the roller are as follows: the amount of radial runout of the roller; the flexibility of the roller; the amount of axial movement.

The influence of the radial runout of the roller on the belt conveyor:

Within the range of the specified amount of runout, the belt conveyor can be kept running smoothly, otherwise it will make the belt conveyor belt resonant beating, causing material toss and polluting the environment. The higher the belt speed, the more it appears that the radial runout is small. The amount specified by the Chinese standard is 0.7 mm, and the amount specified by the Japanese JIS standard is 0.5 mm.

The impact of flexibility on the belt conveyor:

During the operation of the belt conveyor, the flexibility of the roller is very important. If the flexibility of the roller is not good and the rotation resistance coefficient is high, the entire belt conveyor system has to pay a lot of power and consume a lot of electricity. Sometimes it will cause the tape to tear, the motor burns, and in severe cases it can cause a fire. Therefore, the selection of rollers with a low rotation resistance coefficient (less than 0.020) is an important part of the design and selection of the belt conveyor.