Early fault detection in pump valves

Details Early fault detection in pump valves Early fault detection in pump valves

2006-06-27

2006-06-27

Hoff, Marc S. (Department: 2857)

Data processing: measuring, calibrating, or testing

Measurement system

Performance or efficiency evaluation

C702S130000, C702S182000, C702S183000

Reexamination Certificate

active

07069183

ABSTRACT:
In a process for the monitoring and automatic early fault detection in valves, in particular intake and/or pressure valves, of an oscillating displacement pump, in particular a membrane dosing pump, it is provided that the increased operating noise produced by a leaky valve due to the back-flow of the fluid being pumped in the closed state of the valve is used as a measure for the leakiness of the valve by the generated effective signal level being monitored continuously and compared to a reference signal level formed from the operating noise of the pump with an intact valve, where, at a predefined level deviation or change due to increased operating noise, early fault detection is triggered. A device for carrying out of this process includes a corresponding measuring device, in particular in the form of a vibration acceleration sensor measuring the produced structure-borne sound as well as a comparator device.

REFERENCES:
patent: 5000664 (1991-03-01), Lawless et al.
patent: 5439355 (1995-08-01), Jimison et al.
patent: 6731216 (2004-05-01), Ho et al.
patent: 199 47 570 (2001-04-01), None
patent: 11117875 (1999-04-01), None
patent: 2002041143 (2002-02-01), None

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