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L’efficacité d’un couple à vis (50–90 %) est inférieure à celle des engrenages droits/hélicoïdaux : plus de chaleur et d’énergie. Voici les facteurs clés.
1. Nombre de filets et angle d’hélice
Plus de filets et un plus grand angle d’hélice augmentent l’efficacité. Le mono-filet (≈50–70 %) conserve l’auto-blocage pour le levage ; le bi-filet (≈70–85 %) est plus efficace mais perd l’auto-blocage.
2. Matériaux et traitement
Vis trempée et rectifiée : frottement bas. Roue en bronze étain : meilleur frottement que bronze aluminium.
3. Lubrification
Film d’huile stable = efficacité. Bain d’huile préférable à la graisse en service continu.
4. Précision
Denture précise et empreinte régulière réduisent les pertes.
5. Améliorer
Multi-filets si pas d’auto-blocage ; trempe/rectification ; bronze étain ; huile adaptée ; contact correct. Xinmi conseille le couple adapté à votre duty.
