Conveyor belt idler is an important component of belt conveyor, which mainly bears the role of carrying conveyed materials. It bears more than 70% resistance during the belt conveyor transportation. Therefore, the service life of the supporting roller is very important in the whole belt conveyor.
The root cause of the service life of the idler is its internal structure. Due to the poor underground use conditions, the service life of the idler is generally only about 15000h. The idler needs to be frequently replaced downhole, which seriously affects the underground coal production and also increases the belt conveyor. The operating cost also increases the labor intensity of the workers, so how to increase the service life of the idler and thus improve the performance of the belt conveyor has become a big problem before us. The main reason that affects the use performance of the idler is the internal structure of the idler.
The sealing effect is not good:
The waterproof effect is poor, and the production status of the underground belt conveyor is that the dust is large and the dust is removed with water at the same time, so the seal used by the idler must have good dustproof and waterproof effects. If water enters the idler, it will corrode the bearing, and the dust will damage the bearing, and ultimately affect the service life of the idler.
Coaxiality difference of roller shaft:
Due to the abrasion of tires and other factors during the production of cold-drawn optical axis, the dimensional accuracy is unstable, and often exceeds the standard. In addition, it is easy to cause bending during transportation, which makes the coaxiality of the idler shaft poor, and the ends of the idler shaft The clearance of the installed bearings is not guaranteed, so that the rotation resistance of the supporting roller increases, which affects the service life of the supporting roller of the conveyor belt.
Poor coaxiality of bearing seat:
The bearing seat used by the idler is a stamping part, and the joint with the barrel is not processed, and the bearing seat is directly welded on the barrel. The problem that the bearing seat is not round or the unequal end face at the point of cooperation with the barrel skin during stamping is likely to cause different shafts of the bearing seats at both ends after welding with the barrel skin, resulting in reduced bearing clearance, increased rotational resistance, and inflexible rotation.
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