The root cause that affects the service life of the idler is its internal structure. Due to the poor conditions of underground use, the service life of the idler is generally only about 15000h, and it also increases the labor intensity of the workers. Therefore, how to increase the service life of the idler and thereby improve The performance of the belt conveyor has become a big problem before us. The main reason that affects the performance of the roller is the internal structure of the roller.

1. Poor sealing effect:

The effect is poor, and the production status of the underground belt conveyor is dusty, and water is used to remove the dust at the same time, so the seal used for the roller has better dustproof and effect. If water enters the roller, it will corrode the bearing, and the dust will damage the bearing, and ultimately affect the service life of the roller.

2. Poor coaxiality of roller shaft:

Due to the instability of the dimensional accuracy due to factors such as the wear of the mold during the production of the cold drawn optical axis, the phenomenon of exceeding the standard often occurs, and it is easy to bend during transportation, which makes the coaxiality of the roller shaft poor, and the two ends of the roller shaft The installed bearing gap cannot be guaranteed, so the roller resistance increases, which affects the service life of the conveyor belt roller.

3. Poor coaxiality of bearing seat:

The bearing seat used by the idler is a stamped part, and the matching part with the tube skin is not processed, and the bearing seat is directly welded to the tube skin.

The machining accuracy of roller accessories mainly refers to the concentricity of the inner hole of the shell and the two ends of the roller and the machining accuracy of the axial dimensions of each part. If the concentricity is too poor, it will cause the rolling bearing to seize, increase the resistance, and reduce the service life; if the axial dimension error of the parts is too large, a larger axial gap will be formed, resulting in axial movement and damage to lubrication and sealing; The installation quality is not good. How to arrange the rollers reasonably and design the appropriate roller spacing to reduce the number of rollers used, reduce the price of the whole machine, reduce investment, operation and maintenance costs, and improve economic efficiency. The processing technology of the rollers is an important aspect. To ensure the quality of roller processing and assembly, the key is to find a roller manufacturer with technical strength, complete technical equipment, scientific management and good service awareness. The manufacturer should be able to provide users with design calculations, Complete technical services from roller selection, economic and technical analysis to complete machine design.