Convoyeurs longs

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    Des solutions simples, fiables, éprouvées

    En contrôlant la régularité de l'accélération et de la décélération des longs convoyeurs, il est possible de réduire les contraintes mécaniques exercées sur tous les composants de la transmission et dans le convoyeur à bande. De ce fait, la durée de vie du convoyeur et des autres composants du variateur est prolongée, ce qui augmente la disponibilité des biens et réduit les coûts de maintenance et d'exploitation. Disposer de la flexibilité nécessaire au contrôle de la vitesse de longs convoyeurs peut contribuer à réduire les goulots d'étranglement et maximiser l'efficacité d'un process de flux des matériaux, ce qui engendre des économies sur les coûts d'exploitation.

    Des moteurs multiples sont souvent installés sur de longs convoyeurs. La fiabilité de fonctionnement du convoyeur et l'optimisation de sa durée de vie sont assurées en présence de variateurs qui veillent à répartir la charge entre les divers moteurs. Les variateurs VLT® et VACON® incluent des solutions de contrôle maître-maître et maître-suiveur. Le choix de la solution de contrôle dépend de la configuration des variateurs de convoyeur sur le convoyeur (par exemple, tous les variateurs à une extrémité ou des variateurs aux deux extrémités). Les deux possibilités sont simples à mettre en œuvre et se sont avérées être des solutions robustes et fiables pour les convoyeurs longs.

    Pour les convoyeurs en pente, où un fonctionnement en freinage par récupération d'énergie est généralement requis, un variateur Active Front End (AFE) ou, éventuellement, une solution armoire comprenant un 6-pulse avec module régénératif séparé, peut être utilisé.

    Les variateurs VLT et VACON sont amplement utilisés sur de nombreux convoyeurs longs de plus d'1 km, qui se rencontrent fréquemment sur les applications de traitement des matériaux en masse dans des sites miniers, des usines de transformation et des installations portuaires comme :

    • les convoyeurs des systèmes d'alimentation de déchets
    • les aires de stockage
    • les convoyeurs de chargement des trains
    • les convoyeurs à tuyaux
    • les longs convoyeurs par route

     

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