As a novice of simple conveyor belt equipment, often appear troubling deviation problem, because I have done several belt conveyor before (ordinary belt conveyor, electric roller belt conveyor, telescopic lifting belt conveyor, etc.), now I sum up the experience to share.
Opening: transport equipment is now one of the equipment can be seen everywhere, can also be said to be automated blood. There are various types of conveying equipment, including belt conveyor, chain conveyor, bucket conveyor, screw conveyor, roller conveyor, suspension conveyor and so on. Among them, the belt conveyor should be one of the most used, and the belt conveyor has a variety of differences, such as belt conveyor, synchronous belt conveyor, o-belt conveyor and so on. Today we are going to talk about a wide range of belt conveyors.
1、 Conveyor analysis
Ordinary conveyor structure is simple, just need a fixed frame, two rollers, a drive mechanism, tension mechanism and a belt can rotate the conveying goods. If the equipment deviates, the tightening mechanism is usually adjusted. Indeed, adjusting the tightening mechanism should be able to solve 80% of the deviation problem, but sometimes it can not be adjusted for several hours.
Now let’s analyze the various components: the roller (including the adjusting mechanism) bears the brunt of the “culprit”; the fixed frame, put the belt on the fixed, seems no problem; the driving mechanism, only responsible for rotation, seems no problem; the belt, should be the “victim”.
Analysis of the roller, the general belt deviation is due to the roller is not parallel, causing lateral force, and beyond the absorption range of the belt itself, causing serious deviation or even wear stuck.
2、 Common solutions
After analyzing the above, it seems that the problem lies in the adjustment of the roller, because there is no other place to move. The common solutions are as follows:
1. Adjustment mechanism: the most basic configuration, can solve the general deviation; a certain range of adjustment.
2. Roller width: it means that the roller is wider than the belt, giving it free deviation margin; small range adjustment ability.
3. Set up auxiliary: some will set up some side stop mechanism to block the deviation, such as guide pulley set on both sides of the belt, limit, etc.; small range adjustment, serious deviation, accelerate damage to the belt.
4. Drum roller: the roller is made into a convex drum in the middle, so that both sides have the ability to offset part of the lateral force; adjustment within a certain range should be determined according to the taper.
5. Guide strip belt: set guide strip under the belt to prevent belt deviation. Adjustment within a certain range, serious deviation and damage of guide bar.
In fact, these programs can solve the problem of deviation, but there are still a few cases. Even if the above programs are all set, there is still the possibility of deviation, because the adjustment ability is limited.
3、 The origin of the problem
The above settings can not completely adjust the deviation problem, but it is still the problem of lateral force. The above adjustment is also to offset a certain range of lateral force. In this case, the question is, how is the lateral force generated? obvious:
1. Structural problems, serious parallelogram, resulting in excessive lateral force, adjustment mechanism beyond the range of adjustment. This situation can be confirmed by measuring the diagonal length with a tape measure at the initial stage of assembly.
2. In some cases, it may not be able to solve the problem of reassembling parallel, because the rack and the upper belt mechanism form a spatial quadrilateral. At this time, it is necessary to confirm that the height of both ends of each roller is consistent when installing.
So, besides parallelogram, is there anything else you need to pay attention to?
Conveyor belt in use also need to pay attention to, tension not too tight, and pay attention to both sides of the tension not too much difference, otherwise the belt itself is easy to cause one side beyond the elastic range, forming a cone, its own side force.
When the conveyor belt is installed and used, it can be assumed that the elastic range of the belt is about 0.1% – 0.3%, the length of 1000mm can be marked on both sides of the belt, and the two sides can be evenly tensioned to about 1001mm.
The above is the experience after I have done the belt, in addition, if there is a telescopic, large multi section function, it is best to set the adjustment mechanism at the end, and the tension mechanism at the other end.