Pump for conveying hot media

Details Pump for conveying hot media Pump for conveying hot media

F - Mech Eng,Light,Heat,Weapons

04

D

F04D 7/06 (2006.01) F04D 29/04 (2006.01) F04D 29/10 (2006.01) F04D 29/58 (2006.01)

Patent

CA 2214763

The invention concerns a pump for conveying hot media, said pump comprising a pump housing, a seal housing disposed at a distance from the pump housing and connected to the pump housing via a Chinese lantern-shaped structure and disposed at a spacing from the seal housing, a fan wheel disposed in the spacing, and a shaft which penetrates these parts. The cooling of the seal housing and of the bearing housing is improved in that the delivery direction of the fan wheel extends from the pump to the bearing housing. The drive motor can be screened from the heated air flow by the bearing housing. Owing to a heat-insulating device on the pump housing, the cooling air flow is not heated substantially before it reaches the seal housing. The protective plate surrounding the fan and the seal housing is used to guide the air such that the air drawn in first flows radially to the seal housing and is then deflected axially.

L'invention concerne une pompe permettant de refouler des fluides chauds. Cette pompe comprend un corps, un carter d'étanchéité (13, 14) placé à distance du corps de pompe et raccordé à ce dernier, un logement de palier (19) raccordé au corps de pompe par une structure en forme de lampion (7, 17, 18) et séparé du carter d'étanchéité par un espace, un ventilateur (22) placé dans cet espace, et un arbre (4) passant à travers ces pièces. Le refroidissement du carter d'étanchéité (13, 14) et du logement de palier (19) est amélioré, car le débit du ventilateur (22) est dirigé de la pompe vers le logement de palier (19). Le moteur d'entraînement peut être protégé du flux d'air chaud par le logement de palier (19). Un dispositif d'isolation thermique (10) monté sur le corps de pompe permet d'éviter un réchauffement sensible du flux d'air de refroidissement avant que ce dernier parvienne au carter d'étanchéité (13, 14). Une tôle de protection (23), entourant le ventilateur (22) et le carter d'étanchéité (13, 14), sert à conduire l'air de sorte que l'air aspiré arrive d'abord radialement au carter d'étanchéité (13, 14) avant être dévié axialement.

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