The belt conveyor roller is damaged and the machine is shut down to reduce production! 4 forms and causes of roller failure
The idler roller is one of the main components of the belt conveyor and accounts for a large proportion of the total machine cost. The idler roller is also the main wearing part of the belt conveyor. Its operating condition not only affects the stability and operating cost of the belt conveyor, but a damaged idler roller may scratch the conveyor belt, causing greater losses.
Understanding the causes of roller damage and taking precautions during design and use can greatly improve the operating efficiency of the belt conveyor, reduce losses, and reduce costs.
1. The roller skin is worn
The main reason is that the middle part of the roller is worn and broken, and some wear and tear at the contact point between the roller and the edge of the conveyor belt can also cause breakage.
main reason:
1) The rotation resistance of the roller is large, and the friction resistance between the roller and the conveyor belt is large, causing friction.
2) There is a deflection angle between the rotation direction of the roller and the running direction of the conveyor belt, which forms deflection friction resistance and causes wear of the roller.
3) The operating environment of the roller itself is harsh, causing friction such as direct contact between the roller and materials or other items.
2. Damaged roller bearings
The main reason is that the roller bearings are not rotating flexibly, the bearing points are worn, and there are also severe rusts that cause the rollers to not rotate.
main reason:
1) The unreasonable selection of the belt conveyor rollers will cause the bearings to expire and be damaged.
2) The sealing effect of the roller bearing is not good, causing grease contamination, resulting in poor lubrication and damage to the bearing.
3) The belt conveyor roller assembly is filled with a small amount of grease or the quality of the grease is poor, causing the roller to fail to lubricate and be damaged.
4) The overall design of the belt conveyor is unreasonable, and the rollers resonate and accelerate, causing damage to the bearings.
3. The roller is bent, deformed and damaged.
The form of bending damage of the roller is relatively complex. The main reason is that the roller shaft has large bending deformation and the deflection angle is too large, which causes friction between the shaft and the bearing seat, and can also easily cause damage to the roller seal.
1) The belt conveyor roller selection is unreasonable and cannot meet the strength and stiffness requirements.
2) The overall design of the belt conveyor is unreasonable, and only some of the rollers are stressed, causing overload and deformation.
4. Other forms of damage to rollers
Such as desoldering and cracking of the barrel skin and the bearing seat, and the bearing coming out, etc.
The main reasons are that the manufacturing quality of the roller is poor, the bearing positioning is unreasonable, the roller skin is thin, the welding is not strong, there are false welds, the bearing is not installed in place, etc.
The speed of the belt conveyor roller in use is not high, and the load and impact force are not large. If the manufacturing accuracy meets the design requirements, the bearings are not contaminated, they work in a good lubrication state for a long time, and the materials are not severely worn or corrosive. , the service life can reach a relatively ideal state. However, damage to the rollers is inevitable in actual operation. Doing routine maintenance can effectively improve the performance and service life of the equipment.
