Measuring and testing – Blower – pump – and hydraulic equipment
Patent
1988-08-04
1990-03-20
Yasich, Daniel M.
Measuring and testing
Blower, pump, and hydraulic equipment
73652, 310318, 417318, G01G 1300, H03B 532
Patent
active
049090763
ABSTRACT:
The invention provides a device for monitoring pumps to detect danger of damage by cavitation. One object of the invention is to provide a device for this purpose which is simple in design, is readily handled, simple to attach to the pump to be monitored and permanently and straightforwardly indicates if there is cavitation and if so to what degree. These objects are to be attained by a monitoring device for use with a pump comprising a housing with rigid wall part capable of participation in vibratory motion and having an external sensing surface for application on the wall part on a pump housing, an inertial mass arranged in the housing, a piezoelectric vibration transducer held between the inertial mass and the wall part capable of participating in vibration, said transducer being adapted to respond to vibrations of the said wall part, and electric circuitry with a display able to be seen from a point outside the housing to indicate an AC output of the piezoelectric transducer in excess of a certain threshold.
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Busch Dieter
Lysen Heinrich
Fiddler Robert W.
Pruftechik, Dieter Busch & Partner GmbH & Co.
Yasich Daniel M.
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