Rotary kiln with annular, closed end seal, annular, closed...

F - Mech Eng,Light,Heat,Weapons – 27 – B

Patent

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Details

F27B 7/24 (2006.01) F16J 15/34 (2006.01) F27B 7/20 (2006.01)

Patent

CA 2416553

The invention is based on the problem of designing an endless sealing ring for the end wall seal of rotary kilns so that it guarantees a high degree of sealing effectiveness with simpler assembly. The most desired features are small tolerances for cross section and diameter. Rotary-kiln end-wall seals according to the invention should exhibit very low wear and tear if possible and have a service life that corresponds to the maintenance intervals of the rotary kiln as much as possible. This problem is solved for an annular, closed seal for the end seal of a rotary kiln between the rotating tube and the stationary end walls, wherein a core ring has a polygonal, preferably rectangular, cross section with a joint protected from tensile loads and the core ring is surrounded by an endless braid to form the desired final cross section, such that the joint of the core ring is fixed and protected from tension, preferably by tension-relieving threads or fibers extending in the ring circumferential direction and anchored on both sides of the joint.

L'invention vise à régler le problème que pose la conception d'un joint d'étanchéité sans fin alliant un haut degré de scellement à la simplicité d'assemblage, celui-ci étant destiné à servir de joint d'extrémité pour des fours rotatifs. Les plus importantes caractéristiques souhaitées sont de faibles tolérances en ce qui concerne la coupe transversale et le diamètre. Les joints d'extrémité pour fours rotatifs conçus selon l'invention doivent être très résistants à l'usure, autant que possible, et avoir une vie utile estimative correspondant le plus possible aux cycles d'entretien du four rotatif. Ce problème a été résolu, dans le cas d'un joint annulaire fermé pour l'extrémité d'un four rotatif, lequel est installé entre le tube rotatif et les parois d'extrémité stationnaires. L'anneau central a une coupe transversale polygonale, préférablement rectangulaire avec un joint protégé des efforts de tension. Celui-ci est aussi entouré d'une tresse sans fin destinée à lui donner la coupe transversale finale voulue tout en faisant en sorte que le joint de l'anneau central soit fixe et protégé des forces de tension, de préférence au moyen de fils ou fibres de diminution de tension s'étendant dans le sens de la circonférence de l'anneau et ancrés sur les deux côtés du joint.

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