Seal/bearing assembly

Details Seal/bearing assembly Seal/bearing assembly

F - Mech Eng,Light,Heat,Weapons

16

J

F16J 15/40 (2006.01) F04D 3/02 (2006.01) F04D 29/04 (2006.01) F04D 29/10 (2006.01) F04D 29/22 (2006.01)

Patent

CA 2193482

For fitment into the stuffing box of a centrifugal pump. A spiral- groove is cut on the outer surface of the rotor of a pair of tapered bear- ing surfaces. The groove is 0.02 mm deep, 2 mm wide, and its circumfer- ential length is 50 cm. Barrier-liquid is fed to an entry-mouth of the spiral- groove, and groove generates a pres- sure in the stuffing box high enough to overcome process pressure. The barrier-liquid may be water. The in- terface between the bearing surfaces is sealed from the process-fluid and from the outside.

Cet ensemble est destiné à une boîte étanche d'une pompe centrifuge. Une rainure en spirale est découpée sur la surface externe du rotor d'une paire de surfaces de roulement coniques. La rainure a 0,02 mm de profondeur, 2 mm de largeur et sa longueur circonférentielle est de 50 cm. On alimente l'entrée de la rainure en spirale avec un liquide d'arrêt et la rainure produit, dans la boîte étanche, une pression suffisante pour surmonter la pression opératoire. Le liquide d'arrêt peut être l'eau. L'interface entre les surfaces de roulement est rendue étanche au fluide traité et à l'environnement externe.

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