Apparatus and method for diagnosing the status of specific...

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

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F04B 51/00 (2006.01) F04B 49/06 (2006.01)

Patent

CA 2303793

A method and apparatus for diagnosing components in high-pressure pumps to indicate when a component of the pump head is malfunctioning and to identify the malfunctioning component. In one embodiment, a high-pressure pump head incorporating a diagnostic system in accordance with the invention has a pressurization chamber and a pressurizing member at least partially received in the pressurization chamber. The pressurizing member moves within the pressurization chamber along an intake action to draw fluid into the pressurization chamber and along a pressurizing action to compress fluid in the pressurization chamber. An inlet fluid control assembly is coupled to the pressurization chamber to allow fluid to enter the pressurization chamber during the intake action, and a pressurized fluid control assembly is coupled between the pressurization chamber and an outlet chamber to selectively allow pressurized fluid into the outlet chamber during the pressurizing action. The pump head may also include a diagnostic system to indicate the operational status of each of the inlet fluid control assembly, the pressurized fluid control assembly and other components of the pump head upstream from the inlet fluid control assembly with respect to a fluid flow through the pump head during the pressurizing action.

L'invention concerne un procédé et un dispositif permettant d'effectuer un diagnostic d'état sur des éléments de pompes haute pression, afin de signaler le mauvais fonctionnement d'un élément de la tête de pompe et d'identifier l'élément défectueux. Selon une variante, la tête de pompe haute pression comprend un système de diagnostic doté d'une chambre de pressurisation qui reçoit au moins en partie un élément de pressurisation. Cet élément se déplace dans ladite chambre selon un mouvement d'admission pour aspirer le fluide dans la chambre, et selon un mouvement de pressurisation pour comprimer le fluide dans cette chambre. Un ensemble de commande de fluide d'admission est couplé à la chambre de pressurisation pour contrôler l'admission du fluide dans la chambre en cours d'admission, et un ensemble de commande de fluide pressurisé est couplé entre ladite chambre et une chambre d'évacuation pour contrôler sélectivement le transfert du fluide pressurisé dans la chambre d'évacuation en cours de pressurisation. La tête de pompe peut aussi comporter un système de diagnostic permettant d'indiquer l'état opérationnel de l'ensemble de commande de fluide d'admission, l'ensemble de commande de fluide pressurisé et autres éléments de la tête de pompe en amont de l'ensemble de commande de fluide d'admission, pour contrôler l'écoulement du fluide dans la tête de pompe en cours de pressurisation.

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