A typical kiln can grow 100 to 200 mm in length axially (due to temperature variation) from a shut down (cold) condition to its normal operating condition. Accordingly tyre position on roller changes axially. If the rollers are not cylindrical that will restrict the tyre movements leading to various component failure. Hence it is very much essential to keep the tyres and rollers surfaces cylindrical and flat. The same is achieved by our specially designed resurfacing machines. Each pair of support rollers carries considerable weight which can vary from a few tons to as much as over 1000 tons. With that much weight, even the smallest variations in the profiles of the rolling surfaces can have significant and detrimental effects on the entyre unit.
If the rolling surfaces are not flat and cylindrical, any axial movement of tyres on the rollers causes additional loads to be transmitted throughout the mechanism. The magnitude of these additional loads can be substantial and severe. These loads are transferred from the shell, which is the prime mover, through the tyre retaining blocks to the tyre, to the roller, to the bearings, to the structural base and finally into the foundation. All the parts in this mechanical chain act to absorb the additional load. When tyres and rollers are not smooth they are not making even contact with each other. Wear patterns develop accelerating wear, increasing cost of operation and eventually causing component failure.
