Bruit de la courroie de distribution - Causes et solutions
27 février 2019

Bruit de la courroie de distribution - Causes et solutions

Quelles sont les causes du bruit de la courroie de distribution et comment le réduire ? Il existe 4
causes courantes de bruit de courroie. Elles ne sont en aucun cas les seules causes de bruit mais
elles constituent un bon point de départ.

Ils le sont :

  • Impact des dents de la courroie sur la poulie
  • Déplacement de l'air par les dents de la poulie
  • Friction entre la courroie et la poulie
  • Fréquences de résonance

Bruit d'impact

You’ll find impact noise and friction noise are more common at lower belt speeds whereas air volume displacement is common at higher RPMs.

Problème

Le bruit d'impact se produit lorsque la dent de la courroie s'engage dans la poulie.

Solution

  1. To solve this problem, you can minimize the polygonal effect with continuous tooth engagement using belts such as ARC Power.
  2. Reduce the belt width or used a lower tooth.
  3. Switching to a belt such as AT10move-series which has a lower tooth face and a friction reducing coating will reduce noise.

Bruit de frottement

Friction noise is not only a nuisance, but it is damaging to the belt over time.

Problème

S'il y a un différentiel d'engrènement entre la courroie et la poulie, vous obtiendrez des bruits de frottement.

Solution

  1. When you use BRECOflex timing belts and pulleys together, we guarantee perfect meshing.  So as long as you are using the correct belt with the correct pulley, timing belt noise from friction should not be an issue.
  2. For friction noises at lower RPMs, we recommend that you minimize the coefficient of friction by using a nylon covering on the tooth side, which we refer to as a PAZ. You can also opt for a dry lube or silicone grease which can be very effective.
  3. Another solution for friction noise is to choose ARC Power also known as BATK timing belts. The dynamics of the belt reduces friction and the curved technology vents air toward the belt edges. Furthermore, this belt eliminates flange friction because it is self-tracking.

Déplacement du volume d'air

Air volume displacement has a distinct sound and if often described as sounding like air escaping from a balloon.

Problème

Le déplacement du volume d'air est causé par la présence d'un espace entre la courroie et la poulie. Ce type de bruit de courroie de distribution augmente avec la vitesse de la courroie.

Solution

  1. You can maximize air permeability which is especially helpful with high-speed drives. Ways to achieve air permeability is by using multiple smaller belts or by cutting air grooves on the pulley.

Résonance

Problème

La résonance se produit lorsque des vibrations se chevauchent dans votre système. La résonance dépend de la largeur de la bande.

Solution

  1. You can change your driving RMP and try to change variables to quite the drive. You can also opt for a belt such as BATK to reduce polygonal effect and belt oscillation.

Pour un exemple de problème de bruit de courroie et de solution, veuillez regarder la vidéo.

When dealing with issues of noise, examine each of the above variables as a possible cause. It is important to note that noise could be indicative of a bigger issue that could cause damage to your belt, pulley or drive over time.  If you need assistance in determining the cause and solution for our belt noise, please contact a BRECOflex applications engineer.

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Si vous avez des questions ou des commentaires, veuillez nous contacter et nous serons heureux de vous aider.

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