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The solution:
1. Adjust the bearing roller set. When the belt of the belt conveyor runs off in the middle of the belt conveyor, the position of the idler group can be adjusted to adjust the run off; The mounting holes on both sides of the idler set are machined for adjustment during manufacturing.
2. Install aligning idlers. There are many types of aligning idlers, such as intermediate shaft type, four-link type, vertical roller type, etc. The principle is to use the block or idler to rotate in the horizontal plane direction to block or generate transverse thrust to make the belt automatically centripetal to adjust the belt deviation. Generally, this method is more reasonable when the total length of the belt conveyor is short or when the belt conveyor is in two-way operation, because the short belt conveyor is more likely to run off and not easy to adjust. The long belt conveyor is best not to use this method, because the use of aligning rollers will have a certain impact on the service life of the belt.
3. Adjust the position of the driving drum and the reversing drum. The adjustment of driving drum and reversing drum is an important part of belt deviation adjustment. 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 length direction of the belt conveyor, and if the deviation is too large, it will inevitably occur. The adjustment method is similar to the adjustment of idlers. For the head roller, if the belt runs off to the right side of the roller, the right bearing seat should move forward, and the belt runs off to the left side of the roller, the left bearing seat should move forward, and the corresponding left bearing seat can be moved back or the right bearing seat can be moved back. The adjustment method of the tail drum is exactly the opposite of the head drum. The adjustment method is shown in Figure 2. After repeated adjustments until the belt is adjusted to the ideal position. It is best to install the roller accurately before adjusting the drive or reversing.
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 of the weight should be perpendicular to the vertical line of gravity in addition to the direction of the length of the belt, that is, to ensure that the center line of its axis is horizontal. When using spiral tensioning or hydraulic cylinder tensioning, the two bearing seats of the tensioning drum should be translated at the same time to ensure that the axis of the drum is perpendicular to the longitudinal direction of the belt. The specific belt deviation adjustment method is similar to the adjustment at the roller.
5. The influence of the blanking position at the transfer point on the deviation of the belt. Usually the relative height of the two belts above and below the transfer point should be considered. The lower the relative height, the greater the horizontal speed component of the material, the greater the lateral impact on the lower belt, and the material is difficult to center, so that the material on the cross section of the belt is skewed, and eventually the belt runs off.
6. Adjustment of deviation of belt conveyor running in both directions. Bidirectional belt conveyor belt deviation adjustment than one-way belt conveyor deviation adjustment is relatively difficult, in the specific adjustment should first adjust a direction, and then adjust the other direction. When adjusting, carefully observe the relationship between the direction of the belt movement and the trend of deviation, and adjust it one by one. The emphasis should be placed on the adjustment of the driving drum and the reversing drum, followed by the adjustment of the roller and the adjustment of the material blanking point
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