Cavitation monitoring device for pumps
First Claim
1. A cavitation monitoring device comprising a housing with a rigid wall part responding to vibratory motion and having an external sensing surface for securement on the wall part of 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 the vibrations of said wall part and cause vibrations at a predetermined frequency, and electric circuitry with a display observable 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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Accused Products
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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Citations
9 Claims
- 1. A cavitation monitoring device comprising a housing with a rigid wall part responding to vibratory motion and having an external sensing surface for securement on the wall part of 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 the vibrations of said wall part and cause vibrations at a predetermined frequency, and electric circuitry with a display observable from a point outside the housing to indicate an AC output of the piezoelectric transducer in excess of a certain threshold.
Specification