Spectral Pumpenschwingungsdiagnose, rotational speed of the blades and cavitation in pumps

Spectral Vibration diagnosis of the pumps is an important direction of the technical Diagnosis. Acoustic Schwingungsdiagnosemethoden are worldwide the most effective. The new portable 2-channel System BALTECH VP-3470 makes spectral Vibration diagnosis with higher accuracy and measurement speed thanks to 2 parallel Schwingungsmesskanälen "A" and "B". With the Schwingungsanalysator BALTECH VP-3470 and the Software BALTECH Expert, you can first error character of the stock, Pumpenlaufräder (Schaufelfrequenz) and cavitation in pumps.

Frequency the runner blades (F Schaufelfrequenz = F speed х N blades).

This Schaufelfrequenz by Mahlnehmen of the rotor blades of Pumps and the Pumpendrehgeschwindigkeit calculated. It should be emphasized that the Schaufelfrequenz in the spectrum of the standard, and may not reflect specific error suggests. Different Pumps, under different loading conditions to run, to distinguish by the amplitude of the Schaufelfrequenz. So you need good Attaining pumps for comparison. Significant change in amplitude of the Schaufelfrequenz usually indicates a narrowing of the Durchflußquerschnitte.

Cavitation and spectral vibration diagnosis of the pumps.

Cavitation occurs as a result of the difference between the suction pressure and the pressure of the pumps, what the formation and dissolution of dampfgefüllten cavities (vapor bubbles) in liquids causes. You can strong cavitation hear clearly and with Lagerfehlern confused. Usually watching the cavitation in the spectrum of the Schwingungsanalysators BALTECH VP-3470 in the Form of the Geräuschpegelerhöhung (adhesive, wide application range). Permanent Cavitation can impellers and The pump casing cause serious damage. Since the cavitation in the spectrum of critical Lagerfehlern the same, the function PeakVue in Schwingungsanalysator CSI 2140 very useful in the Pumpenanalyse.

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