The reason of belt discomfort of Z type bucket elevator.Bucket elevator will be worn in the process of work, especially the head of the roller. Because the working time of the bucket elevator is long, the middle part of the roller rolling face is in frequent contact with the belt, so long wear time will make the middle of the rolling face sag. This is because the roller surface of drum after the plating layer is worn off, the two sides of the roll surface of the drum will protrude, resulting in the belt of the bucket elevator unidirectional run off. Due to the uncertainty of the off-track position, the belt is not easy to be adjust to the normal position. Because the drum is in the bucket elevator position in the body shell, it will not be found by the crew if the body shell is not removed and the belt on the head of the roller left and right, there is no way to adjust. Besides the drum of the tail wheel of the bucket elevator appears wear, making the belt to and fro deviation. The head wheel and the tail wheel of the bucket elevator are components in contact with the belt of Z type bucket elevator for a long time, so the wear of the tail wheel and the head wheel are basically the same.

Automatic adjustment method for belt tightness of z type bucket elevator. The belt of the bucket elevator will be ou of alignment of slip because of the use of long time. In face of this situation, maintenance personnel will usually take the adjustment of the direction of the roller, change the roller position and other methods. By adjusting the device group, the belt conveyor can effectively deal with the middle part of the tension is not adjusted. There are mounting holes on both sides of the roller set of the hoist. If these mounting holes are made into long holes, it will greatly facilitate the adjustment of the tightness of the hoist. When the position of the belt is shifted to one side, the idler element moves forward in the direction of the belt movement on the same side or make the idlers move back on the other side according to the opposite direction of the belt.This method can make the belt tightness of the Z type bucket elevator be adjusted effectively. The idlers of the bucket elevator generally choose the adjustable idlers because the blocking force of the adjustable idlers is larger. The adjustable idlers will produce transverse force on the belt and the belt will automatically generate centripetal force after being pushed. The adjustable idlers can also block the movement of the belt edge by horizontal rotation, so that the belt will not increase or decrease the tightness due to the changing the position.
It is fast in the transportation and has high stability in the process of lifting. But in the daily use process, the belt of the bucket elevator often appears the phenomenon of not adjusting the tightness, which will lead to the elevator material unloading is not complete. Some raw material residues occupy the hopper space, in the process of secondary transportation, the loading material becomes less and the transportation efficiency decreases. Therefore the tightness of the belt of z type bucket elevator should be ensured through reasonable adjustment.