Shielding a bearing and seal assembly from undesirable matter

Details Shielding a bearing and seal assembly from undesirable matter Shielding a bearing and seal assembly from undesirable matter

F - Mech Eng,Light,Heat,Weapons

04

D

F04D 29/14 (2006.01) F16C 33/76 (2006.01) F16C 33/78 (2006.01) F16J 15/16 (2006.01) F16J 15/34 (2006.01)

Patent

CA 2496461

A rotary pump includes an impeller mounted on a shaft (12) supported for rotation in bearings. A bearing and bearing casing assembly (26) proximate the impeller is prone to ingress of undesirable matter. A shield assembly (40) includes the shaft (12) and a shield (40) rotatable with the shaft and positioned intermediate the impeller and the bearing assembly (26). The shield comprises an integral, moulded, disc (42) and composite rim (44), which includes a lip (50) having an inwardly proud beading (52) normally touching an outer periphery (34.1) of the bearing assembly. A cowl (48) surrounds the lip with clearance when the shaft (12) rotates. The beading (52) dilates under centrifugal force to provide running clearance.

Une pompe rotative comprend une pompe à palettes montée sur un arbre (12) supporté dans des paliers pour tourner. Un palier et un ensemble carter de palier (26) situé à proximité de la pompe à palettes est destiné à empêcher l'entrée de matière indésirable. Un ensemble écran (40) comprend l'arbre et un écran qui peut tourner avec l'arbre et qui est positionné entre la pompe à palettes et l'ensemble palier (26). Cet écran comprend un disque (42) moulé en une pièce et une bague composite (44) qui comprend une lèvre (50) possédant un bourrelet proéminent dirigé vers l'intérieur (52), ce bourrelet touchant une périphérie extérieure (34.1) de l'ensemble palier. Un capot (48) entoure la lèvre avec un intervalle lorsque l'arbre (12) tourne. Le bourrelet se dilate par la force centrifuge de façon à fournir un intervalle de fonctionnement.

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