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- All machines vibrate
- An increase in vibration indicates a status change
- Each rotating part generates a unique frequency and therefore
can be identified
Vibration measurements are taken while the machines are operating
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Vibration Monitoring & Analysis
- The most widely accepted condition monitoring technique
- Easy to use
- Portable and On-Line Systems are used
- Best applied to continuous running machines
- High diagnostic capability
- Enables Production & Maintenance decisions by providing
objective information
- Reduces Plant Risk & Offers Uptime
How Does It Work ?
- Detection : by a routine
programme of measurements on machines
- Analysis : by evaluation
of the trends and individual vibration frequencies
- Reporting : information for
decision making
- Correction : balancing, alignment
etc
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| Data
Collection |
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Acoustic Emission |
Vibration from Switch Panel |
Vibration Direct |
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How do we use the information?
- The information is trended and checked against
alarm levels by software. This highlights any machines
where the health of the machine is beginning to degrade.
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Time Domain
overall data is the sum of all exciting and reacting
forces |
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Spectrum Analysis
Enables precise evaluation of machinery condition
and prediction |
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| Actual Vibration Spectrum |
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| Machinery Severity Chart |
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Severity Levels in Velocity mm/sec Pk
0.1 mm/sec Extremely Smooth
0.2 mm/sec Very Smooth
0.5 mm/sec Smooth
1 mm/sec Very Good
2 mm/sec Good
4 mm/sec Slightly Rough
8 mm/sec Rough
16 mm/sec Very Rough |
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Benefits of Condition Management |
It is an established fact that rotating machines: fans, pumps, motors, generators etc will consume as much as 15% more energy if misaligned or out of balance. Worn or poorly lubricated bearings will contribute to such losses. The Mechanical–Analysis Condition Management System reduces energy consumption, enables greater machinery availability and improves plant productivity; everyone benefits. In 2006 India generated 118,561MW, just 3% saved would translate to 3,500MW of extra power
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