If the drums with too small a diameter but wide conveyors, the unwanted belt would exclude large deflection as a result of creasing and mistracking.It’s a recommendation that,for the cylindrical section with tapered edges of the drive drum, the length is b/2. And the proportions of the drive drum is determined where belt width is considerably less than the drum length.

3. Take-up device

How the contact pressure of the belt on the drive drum to transmit the effective pull, it’s elongating the belt with a tension take-up.

The end drum can serve as a tensioning drum if it is stalled such that it can be moved by screw tension take-ups while remaining parallel to the drive drum.

A fixed tension take-up does not allow any length compensation,which results from variations in elongation when start-up or with fluctuating loads or temperatures.

On very long,heavily loaded conveyor, and to compensate immediately for elongations in the upper strand when working, the tensioning unit must be positioned close to the drive drum.

4. Belt support

Both skid plate and roller design can be used for supporting belt.

Skid plates with chamfered edges should be set approx.2-3mm lower than the belt. And aslo, skid plates must be aligned precisely since they have a profound effect on belt tracking as a result of sliding friction.

Skid plates necessitate thoroughly clean ahead of the conveyor start-up, in case that remnants of protective lacquer coatings or other types of contamination cause considerable difficulties.

Exclusively, support roller bearings are almost used on the condition of low seal friction, because of low rotational resistance and balanced running of support rollers. In order to keep a low centrifugal momentum, support rollers are usually consisted of precision steel tubing or steam tubing.

5. Knife edges

Energy consumption by the belt rised when it runs over knife edges. In the meantime, due to friction in the knife-edge zone,belts running at high speed can be subjected to a substantial temperature goes up.

In consequence, the arc of contact should be maintained up to a minimum.With a movable roller, the frictional force at the knife edge is substantially reduced.

6. Belt tracking and adjustment

Make sure the conveyor and belt can work together well, the fundamentals are important as follows:

---The conveyor must not be distorted by the forces exerted by the belt, just as rigid as it should be.

---All the drums and rollers,especially the drive drum,must be clean.

---Knife edges,drive and end drums and support rollers should be aligned and parallel.

---Goods ought to be always loaded onto the centre of the belt in the direction of travel.

A conveyor belt is tracked to the centre of the conveyor by a tapered or cylindrical drum. The higher the belt speed with the larger the drum diameter,the greater the centring effect.

7. Cleaning device
The effctiveness of how to clean the belts depends mostly on the particular circumstances.

One or more scrapers with plastic or rubber blades will suffice in many instances, which mounted in a frame of flat or profile-section steel set at right angles to the direction of belt moving.

---The belt scraper should be possibly set close to the belt or touch it lightly.

---Plough-type scrapers are always places next to the end drum on the return side.

---Steel scrapers can be used to keep unlagged drums clean.

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