Belt conveyor carrier idlers is a relatively simple structure of the components.Because it is in use in the speed is not high, the load is not, there is no impact, if the manufacturing accuracy to meet the design requirements, the bearings are not contaminated, long-term work in a good lubrication.The material is not serious wear or corrosion, the service life should reach 5-10 million hours.However, in many other cases, the phenomenon of conveyor carrier idlers damage is very serious,Life is only about 1 year, six months damaged conveyor carrier idlers is very common, even less than 1 hour to be worn,or was grinding out a hole, causing serious consequences of scratching or even tearing the tape.So what is the cause of the damage to the conveyor carrier idlers? Is there a solution?
1)The conveyor carrier idlers seal performance is poor, the bearing is polluted by water or dust:
In order to minimize the rotation of the conveyor carrier idlers resistance, are basically using a labyrinth seal structure. As we all know, the labyrinth seal gap is large, the sealing effect is not good.Labyrinth seal gap is small, can only slow down the pollution of water and dust pollution, far can not achieve the desired results. Moreover, the labyrinth seal cavity filled with grease, and a substantial increase in the rotation of the conveyor carrier idlers resistance.Therefore, all the conveyor carrier idlerss at home and abroad, in the harsh environment such as watering or dust, the maximum service life of not more than 10,000 hours, the shortest only about 2000 hours, the bearing failure of the cycle can not be expected.There are two kinds of damage: 1, the rotation resistance increases, the body circumference quickly penetrated; 2, the bearing stuck body was grinding a hole.There is only one solution: must ensure that the bearings will never be contaminated. In 2003, we found in the development process, the water or dust into the labyrinth seal principle.And according to the principle, the design of the water and dust can never pass through the outermost first seal of the labyrinth seal structure, so that the bearing can run in a good long-term lubrication, to 5 million hours of normal life.
2)Pollution of Slurry for conveyor carrier idlers:Coal mine under the water, the adhesive tape on the mud,fall on both sides of the idler and the conveyor carrier idlers on the conveyor carrier idlers.The first fall after the hardened piled up,until the end face of the conveyor carrier idlers is completely sealed.The slime that continues to fall is a height difference from the labyrinth seal.In the role of pressure, the slime is easy to enter the labyrinth seal pollution bearing.The solution is simple and very clever: on the rotating seal to make a raised “cleaner”.Both the resistance of the conveyor carrier idlers has no effect, but also in time to drop the mud removed.To prevent the accumulation of mud in the end of the conveyor carrier idlers, do not produce a pressure difference, so as to achieve the effect of mud does not enter the seal.
3）Material on the conveyor carrier idlers body of the serious wear and tear:In the steel industry coking plant, sintering or pellet plant, conveying steel slag and wet slag.Adhesive tape on the hard and sharp material, the conveyor carrier idlers tube pipe wear quickly.The solution is to ensure that the conveyor carrier idlers rotation flexibility and sealing performance under the premise of improving the wear resistance of the pipe.Our company currently has two methods: First, the package car tire rubber wear layer conveyor carrier idlers, changing the sharp material and metal pipe friction and wear mechanism, wear resistance increased by 20-30 times.Molded ultra-high molecular weight polyethylene conveyor carrier idlers, the conveyor carrier idlers wear resistance after the car tire rubber, and the other with light weight, no noise, corrosion corrosion, power, not to hurt the tape, easy installation, reduce labor intensity And other significant features.