Method and system for determining pump cavitation and...

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

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F04D 15/02 (2006.01) G01M 99/00 (2011.01) F04D 29/08 (2006.01) F04D 29/66 (2006.01)

Patent

CA 2445273

A method and system for determining pump cavitation is disclosed. In accordance with the principle of the invention, changes in dynamic fluid pressure within a pump are monitored and compared to a determined cavitation alarm pressure. The determined cavitation pressure is determined as a known percentage of a known non-caviation pressure. Fluid cavitation is determined when the change in dynamic fluid pressure falls below the determined cavitation alarm pressure. In a further aspect of the invention, a remaining mechanical seal operational life can be determined by maintaining a total time of fluid cavitation and reducing the expected life by the known operational time of the pump and the time the pump is in cavitation.

L'invention concerne un procédé et un système visant à déterminer la cavitation d'une pompe. Selon le principe de l'invention, les changements de pression fluidique dynamique d'une pompe sont surveillés puis comparés à une pression d'avertissement de cavitation déterminée. La pression de cavitation déterminée est définie comme un pourcentage connu d'une pression de non cavitation connue. La cavitation fluidique est déterminée lorsque le changement de pression dynamique fluidique descend en dessous de la pression d'avertissement de cavitation déterminée. Dans un autre aspect de l'invention, la durée de vie opérationnelle restante d'un joint d'étanchéité mécanique peut être déterminée par maintien de la durée totale de cavitation fluidique et par réduction de la durée de vie prévue par la durée opérationnelle de la pompe et la durée de cavitation de la pompe.

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