Rotary kinetic fluid motors or pumps – Method of operation
Reexamination Certificate
2005-04-12
2005-04-12
Verdier, Christopher (Department: 3745)
Rotary kinetic fluid motors or pumps
Method of operation
C415S118000, C415S104000, C073S168000
Reexamination Certificate
active
06877947
ABSTRACT:
A method and apparatus for early fault detection in a centrifugal pump equipped with a balancing device, where the balancing device has an axial gap and optionally at least one radial gap through which a balancing flow is conducted, and with a spring element which acts on the balancing device to hold open the axial gap. Reliable information regarding impending faults is obtained while largely using existing elements by measuring the deformation of the spring element (10, 14) during operation of the centrifugal pump (24), and starting from the pump characteristics of the centrifugal pump (24) and the spring constant of the spring element (10, 14), drawing a conclusion regarding the instantaneous operating state of the centrifugal pump based on the measured deformation.
REFERENCES:
patent: 3468259 (1969-09-01), Morzynski et al.
patent: 4578018 (1986-03-01), Pope
patent: 4884942 (1989-12-01), Pennink
patent: 4909076 (1990-03-01), Busch et al.
patent: 5277543 (1994-01-01), Noguchi et al.
patent: 5649449 (1997-07-01), Algers
patent: 5713720 (1998-02-01), Barhou
patent: 6568901 (2003-05-01), Wang et al.
patent: 886250 (1953-08-01), None
patent: 3725754 (1989-02-01), None
patent: 4225783 (1993-02-01), None
patent: 19615923 (1996-10-01), None
patent: 55-87889 (1980-07-01), None
patent: WO 0077405 (2000-12-01), None
German Search Report, dated Jun. 3, 2003.
Hellmann Heinz-Dieter
Schaefer Falk
Schill Juergen
Trautmann Christian
Crowell & Moring LLP
KSB Aktiengesellschaft
Verdier Christopher
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