- The role of the roller is to support the weight of the conveyor belt and the material. The idler is flexible in operation. Reducing the friction between the conveyor belt and the supporting roller 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 roller is a small part in the belt conveyor and the structure is not complicated, it is not easy to manufacture the roller.The roller is an important part of the belt conveyor, with many types and large quantities. The function is to support the belt, reduce the running resistance of the belt, and make the verticality of the belt not exceed the limit so that the belt can run smoothly.The rollers are classified into self-aligning rollers, buffer rollers, trough rollers, and parallel rollers according to their uses. The function of the self-aligning roller is to correct the deviation of the belt conveyor. Usually, a rotary groove-shaped self-aligning roller is installed on the heavy-duty section of the conveyor, and a parallel self-aligning roller is installed on the unloaded section. The buffer roller is applied to the tailstock of the machine according to the actual situation. When receiving the material, it can reduce the impact of the material on the belt, which is beneficial to the service life of the long belt. The trough-shaped roller is generally composed of two side rollers and a flat roller. The groove angle is generally 30 degrees. For a detachable belt conveyor, the three rollers of the trough-shaped roller are hinged together. Called hinged roller. The parallel roller is generally a long roller, which is installed at the lower end under pressure, so it is called the lower roller.There are two types of rollers: steel and plastic rollers. There are three types of bearing seats for rollers: cast iron and steel stamping and phenolic plastic.The seal of the roller can be divided into steel and plastic. Their seals are filled with grease inside. The quality of the roller directly affects the power consumption of the belt conveyor and the life of the belt. Therefore, dust-proof sealing and good lubrication are important standards.The rollers account for 35% of the total cost of a belt conveyor and generate more than 70% resistance, so the quality of the rollers is particularly important.