Reinforced elastomer lining for pump casing and associated...

F - Mech Eng,Light,Heat,Weapons – 04 – D

Patent

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F04D 29/00 (2006.01) F04C 29/00 (2006.01) F04D 29/42 (2006.01)

Patent

CA 2094451

A replaceable lining for a centrifugal pump casing includes a continuous substantially rigid shell made of thermoset plastic resin material reinforced with woven roving fiberglass fabric sheets and randomly dispersed glass fibers. The lining also includes an elastomer layer bonded to an inner surface of the rigid shell. Both the elastomer layer and the shell have a volute section and a semicylindrical or semiconical discharge section integral therewith. The discharge section of the shell is provided along an outer surface with a plurality of outwardly projecting arcuate reinforcement ribs spaced along the discharge section. The ribs are integral with the shell. The shell is preformed and adhesively bonded to the elastomer layer during a compression molding step of a manufacturing process.

L'invention concerne un revêtement intérieur pour corps de pompe centrifuge comprenant une enveloppe continue généralement rigide en résine plastique thermodurcie, renforcée de feuilles de fibre de verre stratifil et de fibres de verre dispersées de manière aléatoire. Le revêtement intérieur comporte également une couche élastomère liaisonnée à la surface intérieure de l'enveloppe rigide. La couche élastomère et l'enveloppe ont une partie spirale et une partie refoulement semi-cylindrique ou semi-conique intégrée à la première. La partie refoulement de l'enveloppe est placée le long d'une surface extérieure comportant une série de nervures de renfort arquées, en saillie vers l'extérieur, espacées le long de la partie refoulement. Les nervures font partie intégrante de l'enveloppe. L'enveloppe est préformée et collée à la couche élastomère au cours d'une étape de moulage par compression du procédé de fabrication.

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