Analysis and solution of the cause of Conveyor roller failure (Part 2)

Pollution of the muddy contaminants on the idler: When the coal mine is large, the clay on the tape is dropped onto the support and the roller shaft on both sides of the idler. The first fall after the hardened pile up until the end of the roller 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 very simple and very clever: in the rotation of the lid to do a raised "cleaner", both the resistance of the roller has no effect, but also in a timely manner to remove the falling mud to prevent the mud in the roller End face accumulation, no pressure difference, so as to achieve the effect of mud does not enter the seal.

On both ends of the roller bearing position alignment out-of-tolerance, bearing force, the earlier period damage of rotation: due to the cumulative error of machining and welding deformation, result in alignment on both ends of the roller bearing position is beyond the scope of the bearing allows accuracy, not only make the rotation of the roller resistance increases, the accelerating tube body and tape between the wear and tear, consuming power, the life of the bearing will be discounted.(in good lubrication, a roller with 1 n rotation resistance is rotated and the bearing service life reaches 150,000 hours; Rotary resistance 3N roller, bearing service life of 50,000 hours; Rotation resistance 5-8N of roller, bearing service life of less than 10,000 hours.

The solution is: to improve the roller production process, so that the rotation of the roller average ≤ 1N.

Hongda successfully developed the roller tube body is not large processing equipment, to avoid the mechanical processing or welding deformation process errors, to ensure that the bearing at both ends of the bearing position of the different axis ≤ 0.05mm, rotation resistance Average ≤ 1N, so as to ensure that the bearing life of 150,000 hours.

Material on the roller body serious wear and tear: in the steel industry coking plant, sintering or pellet plant, conveying steel slag and wet slag, adhesive tape attached to the hard and sharp materials, the roller tube pipe wear quickly The For example, in Shanxi Lu Po coking plant, parallel to the roller 10-15 days was worn; Boatel Ironworks P301 belt machine, parallel to the roller under the plastic surface. 3 months to be finished grinding; Jinan steel mill conveyor belt conveyor belt, more than 1 month tube was worn; Guangxi Laibin B power plant conveyor belt conveyor belt, life does not exceed 3 months, too numerous to mention.

The solution is to ensure that the roller 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 roller, changing the sharp material and metal pipe friction and wear mechanism, wear resistance increased by 20-30 times. For example, in the coking plant 15 days roller was worn position, wrapped in automotive tire rubber wear roller can reach the service life of more than 2 years;

Second, the molding of ultra-high molecular weight polyethylene roller, the roller wear resistance after the car tire rubber, and the other with light weight, no noise, corrosion, power, not to hurt the tape, easy to install, Labor intensity and other significant features.