Phase Analysis: Step By Step Procedure
Phase Analysis: Step By Step Procedure
(OP)
Hi
I am looking to get a step by step procedure to carry out phase analysis for a basic machine train (say Direct coupled motor driven pump) operating at 3000 rpm.
The spectrum is showing harmonic peaks gradgually reducing in amplitude (i. e. 1X > 2X > 3X and so on...). There is no indication of bearing deterioration at this stage although overall vibration value has suddenly increased from 2.00 mm/s to 15 mm/s .
Help me .
N4907
I am looking to get a step by step procedure to carry out phase analysis for a basic machine train (say Direct coupled motor driven pump) operating at 3000 rpm.
The spectrum is showing harmonic peaks gradgually reducing in amplitude (i. e. 1X > 2X > 3X and so on...). There is no indication of bearing deterioration at this stage although overall vibration value has suddenly increased from 2.00 mm/s to 15 mm/s .
Help me .
N4907





RE: Phase Analysis: Step By Step Procedure
But I know it will be helpful for you to identify what kind of analyser do you have? Also do you have strobotach and access to a point on shaft with a mark?
RE: Phase Analysis: Step By Step Procedure
- Vibration may be directional, compare vertical and horizontal measurements. In horizontally mounted machines, the 1xRPM component often is greater in Vertical direction than Horizontal when clearances open up.
- a high 3xRPM component can indicate a bearing slipping on the shaft while a high 4xRPM can indicate a bearing loose in its housing
- confirm low or normal axial vibration
- check for noisy or impulsive waveform
RE: Phase Analysis: Step By Step Procedure