Improvements to crushers with ring-shaped track and roller

Details Improvements to crushers with ring-shaped track and roller Improvements to crushers with ring-shaped track and roller

B - Operations, Transporting

02

C

B02C 15/06 (2006.01) B02C 15/00 (2006.01)

Patent

CA 2285654

The invention concerns a crusher comprising a ring-shaped track with horizontal axis (14), a roller (16) rolling on said track, means for pressing the roller on the track and means (18) for displacing the material from one track edge to the other so that it passes several times under the roller before it is evacuated. In order to improve the efficacy of the roller and the distribution of mechanical stresses in the roller and the track, the track (14) and the roller (16) are so designed that the space between them decreases from the track (14) edge on the side supplying the material to be crushed up to a distance from said edge not less than 80 % the track width, and that this space then quickly increases to constitute a decompression zone (19) on the side where the material is evacuated.

L'invention a pour objet un broyeur comportant une piste annulaire à axe horizontal (14), un rouleau (16) apte à rouler sur ladite piste, des moyens pour presser le rouleau sur la piste et des moyens (18) pour déplacer la matière d'un bord à l'autre de la piste de telle sorte qu'elle passe plusieurs fois sous le rouleau avant d'être évacuée. Pour améliorer l'efficacité du broyeur et la répartition des contraintes mécaniques dans le rouleau et la piste, le piste (14) et le rouleau (16) sont conçus de telle sorte que leur écartement décroît depuis le bord de la piste (14) situé du côté de l'alimentation en matière à broyer jusqu'à une distance de ce bord au moins égale à 80 % de la largeur de la piste, et en ce que cet écart croît ensuite rapidement pour former une zone de décompression (19) du côté de l'évacuation de la matière broyée.

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