| Résumé : |
A centrifugal fan in a steel plant is often exposed to abrasive dust, which results in material loss and a shortage of running time for the fan. With TLT-Turbo's new approach to hybrid coatings, even the most challenging customer requirements can be met.
Centrifugal fans in the steel industry are often exposed to rough and challenging conditions like vibrations, high temperatures and abrasive particles. While vibrations can mostly be avoided by balancing measures and temperature resistance achieved by the right choice of material and dimensioning of cooling dises, resistance against abrasive particles is still a challenge for many centrifugai fans. So, the dust load in the air, as well as the size, the speed or the hardness of the particles determine the running time of a centrifugai fan in a steel plant. That was the main incentive for TLT Turbo to invest great efforts to considerably increase the running time of centrifugai fans in dust-loaded conditions.
Already, since approx 1970, TLT-Turbo has performed particle jet wear experiments on various fan materials and coatings. For that, TLT-Turbo used a particle jet test stand, where a standardised test sand (with standardised grain size distribution) was blasted under a defined pressure/speed, as well as special defined angles to surfaces of different fan materials and coatings. By exactly measuring the material loss after a defined amount of sand/time of blasting, TLT-Turbo determined erosion rates that correspond with the wear resistance of the investigated materials and coating. |
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Valeurs caractéristiques des constructions thermoplastiques soudées. Détermination des contraintes admissibles et des modules pour la conception du matériel thermoplastique - Norme NF EN 1778 / Saint-Denis La Plaine : Association Française de Normalisation (AFNOR) (2000)
