Rollers are important components of belt conveyors, 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 a certain limit to ensure the smooth running of the belt. The roller drives the roller tube body, the bearing seat and the bearing outer ring and the sealing ring to rotate by the friction between the conveyor belt and the idler roller, and realizes the transmission of the logistics together with the conveyor belt.
The rollers are divided into rubber rollers, ceramic rollers, nylon rollers and insulated rollers according to the material. The steel roll core of the rubber roller is overmolded with rubber or a rubber ring. Porcelain rollers are referred to as porcelain rollers. This product not only has the characteristics of wear resistance, acid and alkali resistance, oxidation resistance, stable operation, anti-theft, etc., and the ceramic roller can effectively prevent belt deviation, reduce local loss of belt and extend belt use. life. The nylon roller has a low friction coefficient and is wear-resistant, and is not easy to damage the belt. It has excellent self-lubricating property, can be operated under harsh environmental conditions without oiling during use, is not easy to be stuck, and has good anti-magnetic properties.
The rollers are classified into a centering roller, a buffer roller, a groove roller, and a parallel roller according to their use. The grooved roller has the characteristics of corrosion resistance, and the acid and alkali salts all have a corrosive effect on it. The grooved roller has strong hardness, good sealing performance, long service life of the grooved roller and low operating cost. The buffer roller is used for the belt conveyor to reduce the impact of blanking on the conveyor belt. It is mainly used for the corrosive environment such as coal washing plant, coking plant and chemical plant. The toughness of the roller is ordinary. More than 10 times of metal, the life is five times that of traditional column shoes, corrosion-resistant flame retardant, anti-static, light weight and other characteristics, widely used in mining.
The roller accounts for 35% of the total cost of a belt conveyor and produces more than 70% resistance, so the quality of the roller is particularly important. The criteria for judging the quality of the rollers are as follows: the amount of radial runout of the idler; the flexibility of the idler; the amount of axial turbulence.