Piston sealing mechanism for liquid additive injection pump

Details Piston sealing mechanism for liquid additive injection pump Piston sealing mechanism for liquid additive injection pump

F - Mech Eng,Light,Heat,Weapons

04

B

F04B 53/02 (2006.01) F04B 13/02 (2006.01) G05D 11/00 (2006.01)

Patent

CA 2524244

A system for injecting a predetermined amount of a secondary fluid stream into a primary fluid stream uses a liquid additive injection pump driven by a powered motor driven by the primary fluid stream. The liquid additive pump has a reciprocating piston movable within a cylinder between upstroke and downstroke positions to meter the secondary fluid and a piston sealing mechanism comprising spaced-apart distal and proximal sealing elements. The distal piston-sealing element is flared in the direction of piston downstroke and the proximal piston-sealing element is flared in the direction of piston upstroke.

L'invention pore sur un système d'injection d'une quantité prédéterminée d'un courant de fluide secondaire dans un courant de fluide primaire, ce système utilisant une pompe d'injection d'un additif liquide commandé par un moteur électrique entraîné par le courant de fluide primaire. La pompe d'injection d'additif liquide possède un piston alternatif pouvant se déplacer dans un cylindre entre des positions de montée et de descente afin de mesurer le fluide secondaire, et un mécanisme d'étanchéité de piston comprenant des éléments d'étanchéité espacés distaux et proximaux. L'élément d'étanchéité de piston distal est évasé ans le sens de la descente du piston et l'élément d'étanchéité de piston proximal est évasé dans le sens de la montée du piston.

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