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Knowledge of the rollers for conveyors

Apr 08, 2019

Roller, cylindrical parts, divided into drive and driven rollers, used in printing machines, digital printers, conveyors, paper and packaging machinery and other transmission systems. Stainless steel, cast steel, solid forged alloy steel core as material.

      The rubberized roller is an important part and component of the belt conveying and transportation system. The rubber-clad material can be made of natural rubber, nitrile rubber, neoprene rubber, EPDM rubber or polyurethane. The diameter of the rubberized roller is selected: 25mm, 32mm, 38mm, 42mm, 50mm, 57mm, 60mm, 76mm, 80mm, 89mm. Roller material selection: carbon steel galvanizing, carbon steel chrome plating, carbon steel rubber, aluminum alloy, stainless steel, ABS, etc. The laminating of the drum can effectively improve the running condition of the conveying system, protect the metal drum from being worn, prevent the belt from slipping, and make the drum and the conveyor belt run synchronously, thereby ensuring efficient and large-volume operation of the conveyor belt. The glue can also effectively prevent the sliding friction between the drum and the conveyor belt, reduce the material adhesion on the surface of the drum, thereby reducing the deviation and wear of the conveyor belt. The encapsulation technology is divided into two categories. The traditional encapsulation technology, such as hot vulcanization encapsulation technology, mainly vulcanizes the rubber and the drum through a vulcanization tank to ensure the bonding strength between the rubberized panel and the roller, and the second is a cold vulcanization package. The glue technology uses a special cold vulcanization method to directly bond the drum and the rubberized panel, and can be used to encapsulate the rubber in the well. The technology is advanced and the labor cost is greatly reduced.

      The bend pulley, also known as the guide roller, is a key component of the common belt conveyor. It is mainly used to change the running direction of the conveyor belt or to press the conveyor belt to increase the wrap angle of the transmission drum. The reversing drum is mainly under the movement of the conveyor belt. If the conveyor belt is transported to the left, then the reversing drum is on the right side of the conveyor. The main structure is the bearing and the steel cylinder. The transmission drum is the driving wheel of the conveyor. The relationship between the two is like two bicycle wheels, the rear wheel is the transmission roller, the front wheel is the reversing roller; the reversing roller and the transmission roller are indistinguishable in structure, and are all driven by the main shaft roller bearing and the bearing chamber. The transmission drum is divided into two main drives and a driven one.

      The drive roller is the main component of the belt conveyor to transmit power. The way to drive the belt conveyor is the single roller, the double roller and the multiple roller. Single drums are often used on conveyors with less power, such as coal mine ground transportation and coal preparation plants. Downhole belt conveyors generally use double rollers to make the conveyor compact. The surface of the drive roller has a bare steel surface, a herringbone and a diamond-shaped rubber cover. Bare steel surface can be used for low power, small bandwidth and dry environment. The chevron pattern has a large friction coefficient, good slip resistance and drainage, but is directional. Diamond-shaped rubber surface for conveyors that run in both directions.

       For the selection of the drum, we should pay attention to the following points: the goods of different widths should be selected for the width of the drum, under normal circumstances, the "conveying material + 50mm". According to the weight of the conveyed material, it is evenly distributed to the contact rollers, and the required load of each drum is calculated to determine the wall thickness and the shaft diameter of the drum. Depending on the conveying environment, determine the material and surface treatment (carbon steel galvanized, stainless steel, black or rubber) used for the drum. According to the specific requirements of the overall conveyor, choose the installation method of the roller: spring press-in type, inner shaft type, full flat type, through shaft pin hole type. For the tapered roller of the cornering machine, the width and taper of the rolling surface depend on the size of the cargo and the turning radius.