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Installation and commissioning of conveyer belt
- Nov 30, 2017 -

Installation and commissioning of conveyer belt

The conveyor belt is the key equipment of the conveying system, and its safe and stable operation directly affects the production operation. The running deviation of the conveyer belt is the most common fault of the belt conveyor. The timely and accurate treatment of the conveyor is the guarantee of its safe and stable operation. There are many phenomena and reasons for the deviation. Different adjustment methods should be taken to solve the problems effectively according to the different deviation and reasons. This paper is based on the practice of many years, from the angle of the user, using the principle of mechanics to analyze and explain the causes and treatment methods of this kind of fault.

First, the axis of the head driving drum or the tail changing drum is not vertical with the conveyor center line, causing the conveyor belt to deviate from the head cylinder or tail to the drum. When the conveyor belt at the deflection roller, roller on both sides of the tightness of the inconsistency, the width direction of the traction force of Fq is not consistent, as increasing or decreasing trend, this will make the conveyor belt attached to a moving force to the descending direction of Fy, causing the belt deviation to the loose side, the so-called "run run loose tight". The adjustment method is as follows: as for the head drum conveyor belt deviation to the right side of the drum, the right bearing seat shall move forward, the conveyor belt to the drum on the left side, then the left bearing seat shall move forward, corresponding to the left bearing seat can be moved or right bearing seat back. The adjustment method of the tail roller is just the opposite of the head roller. After repeated adjustment, the conveyor belt is adjusted to the ideal position. It is best to install its position accurately before adjusting the driving or changing to the roller.

Two, the machining error of the outer surface of the roller, the unequal material or the uneven wear of the roller cause the difference in diameter, and the conveyer belt will run to the larger side of the cylinder. That is, the so-called "run big and not run small". The force is shown in Figure four: the traction force Fq of the conveyor belt produces a Fy of moving force to the large diameter side, and the belt is offset under the action of Fy. For this situation, the solution is to clean the surface of the roller, and the processing error and uneven wear will be replaced and processed again.

Three, the location of the unloading point at the transfer point is not as good as figure five, which results in the deviation of the conveyor belt. The location of the material at the point of delivery has a great influence on the deviation of the conveyor belt, especially when the upper conveyor is perpendicular to the horizontal plane when the conveyor is vertical. The relative height of the upper and lower two belt conveyer at the reloading point should be considered. The lower the relative height, the greater the horizontal velocity component of the material, the greater the lateral impact force Fc to the lower belt, and the material is hard to stay in the middle. The material deflected in the cross section of the conveyor belt, and the horizontal force Fy of the impact force Fc eventually leads to the deviation of the belt. If the material is to the right, the belt runs to the left, and vice versa. In this case, the relative height of the two conveyer should be increased as much as possible in the design process. The forms and sizes of the upper and lower funnels and the guide grooves of the belt conveyer which are restricted by space should be considered more seriously. The width of the general guide groove should be about 3/5 of the width of the belt. In order to reduce or avoid the deviation of the belt, the material can be blocked by the baffle plate, and the direction and position of the material will be changed.

Four, the installation position of the bearing roller group and the perpendicularity of the center line of the conveyor are large, causing the belt to run off in the bearing section. The conveyor belt moves forward to roller a forward Fq traction, the traction force is decomposed into the roller rotating force Fz and a lateral component of Fc, the transverse component of the supporting roller axial movement, the roller roller is fixed to the axial movement, it will inevitably produce a reaction of Fy on the conveyor belt, the conveyor belt to move to the other side, which leads to the deviation. It is not difficult to understand the reason why the belt runs off, and the method of adjustment is clear.

The first method is to process the growth holes on both sides of the rollers in order to adjust. The specific method of adjustment is shown in Figure two. The specific method is which side of the belt is biased, which side of the roller group moves forward towards the direction of the belt, or the other side moves back. The lower position of the roller group should move to the left at the lower position of the roller group as shown in Figure two, and the upper part of the roller group moves to the right.

The second method is to install self-aligning roller group, self-aligning roller group has many kinds of types such as the intermediate shaft, four connecting rod type, vertical roller type, the principle is used to block or roller to rotate in a horizontal plane direction or transverse thrust belt to stop automatically adjust the centripetal belt deviation, the the force and bearing force deflection roller group the same. Generally speaking, the method is reasonable when the total length of belt conveyor is shorter or the two-way operation of belt conveyor is reasonable. The reason is that the shorter belt conveyor is more prone to deviate and is not easy to adjust. And the long belt conveyor should not use this method, because the use of the adjustment roller group will have a certain impact on the service life of the conveyor belt.