Belt conveyor solution

Belt deviation is the most common fault in the operation of belt conveyor. In order to solve this kind of fault, it is important to pay attention to the dimensional accuracy of installation and daily maintenance. There are many reasons for deviation, which need to be treated differently according to different reasons:

1. Adjust the bearing roller set. When the belt with belt runs off in the middle of the whole belt conveyor, the deviation can be adjusted by adjusting the position of the idler group; During manufacturing, the mounting holes on both sides of the idler gear set are machined into long holes for adjustment. The specific method is to which side the belt is biased, which side of the idler group moves forward along the direction of belt advancement, or the other side moves backward. If the belt deviates upward, the lower position of the idler assembly should move to the left and the upper position of the idler assembly should move to the right.

2. Install the self-aligning idler assembly. There are many types of self-aligning idler groups, such as intermediate shaft type, four-bar type and vertical roller type. Its principle is to stop the rotation of the idler in the horizontal plane or generate lateral thrust to automatically center the belt, thus adjusting the belt deviation. Generally, when the total length of the belt conveyor is short or the waist line runs in both directions, it is more reasonable to adopt this method, because the shorter belt conveyor is more prone to deviation and difficult to adjust. It is best not to use this method for long belt conveyor, because the use of self-aligning idler groups will have a certain impact on the service life of the belt.

3. Adjust the positions of the driving roller and the reversing roller. The adjustment of driving roller and reversing roller is an important link in the adjustment of belt deviation. Because a belt conveyor has at least 2 to 5 rollers, the installation position of all rollers must be perpendicular to the center line of the belt conveyor in the length direction. If the deflection is too large, deviation will inevitably occur. The adjustment method is similar to that of the idler gear set. If the belt of the head drum deviates to the right of the drum, the right bearing seat should move forward; if the belt of the conveyor deviates to the left of the drum, the left bearing seat should move forward; accordingly, the left bearing seat can move backward or the right bearing seat can move backward. The adjustment method of the tail drum is just the opposite to that of the head drum. After repeated adjustment until the belt is adjusted to the ideal position, it is best to install its position accurately before adjusting the transmission or changing the direction of the drum.

4. Adjustment of tension. The adjustment of belt tension is a very important link in the deviation adjustment of belt conveyor. The two reversing rollers at the upper part of the tension part of the heavy hammer should be perpendicular to the vertical line of gravity in addition to the length direction of the belt, that is, to ensure that the axis line is horizontal. When using screw tensioning or hydraulic cylinder tensioning, the two bearing seats of the tensioning roller should be translated at the same time to ensure that the roller shaft is perpendicular to the longitudinal direction of the belt. The specific adjustment method of belt deviation is similar to the adjustment at the drum.

5. It is much more difficult to adjust the deviation of the two-way belt conveyor than the one-way belt deviation. In the specific adjustment, we should first adjust one direction and then adjust the other. When adjusting, carefully observe the relationship between belt movement direction and deviation trend, and adjust them one by one. The emphasis is on the adjustment of driving roller and reversing roller, followed by the adjustment of idler and blanking point. At the same time, it should be noted that the stress on the belt segment in the length direction should be uniform when the belt is vulcanized, and the stress on both sides should be as equal as possible when the belt is pulled by the guide chain.