Question 7.1. In paper and pulp mils,
metallurgical plants, and other industries, the most important equipment often
has low rotating frequencies - from 2-3 up to 5-100 RPM. In diagnostics of
equipment with such low rotating speeds, as we know the vibration diagnostics
does not give as expected high efficiency as, for example, the method of
rotating speed pulsation analysis. And the number of measurement points have to
be much more than for example in the conveyer monitoring system by speed
pulsation where only one tacho transducer on the driver electric machine is used.
Is not it worthwhile to refuse to use on-line monitoring systems using vibration
and to substitute monitoring systems analyzing the rotating speed pulsation for
(The question was asked during a meeting of specialists in diagnostics from the
main Russian paper and pulp mills.)
The question is answered by Alexej V. Barkov. 20 July 1999.