Root Cause Analysis (RCA): Compressor near ½-RPM frequency high magnitude shaft vibrations.
| Article Type: | Root Cause Analysis (RCA) |
| Category: | Mechanical |
| Equipment Type: | High Speed, Hi KW Major Rotating Machines |
| Author: | S. Raghava Chari |
Note: This root cause analysis (RCA) is from real-time scenarios that happened in industries during the tenure of one or two decades ago. These articles will help you to improve your troubleshooting skills and knowledge.
K-603, a horizontally split 8000 RPM, 2000 KW, centrifugal compressor draws 300 mm WC CO2 and delivers it at 13-bars. It performed fine, but for 45 to 50% x shaft RPM frequency 75 to 100 microns amplitude high shaft vibration problems.
Unable to find a cause, the plant lived with high vibration problems for over 5 years.
The author learnt from a tech journal article that tilting pad bearings eliminated such vibration problems in a compressor.
Substituting compressor vendor-supplied TPB was the answer.
Author: S. Raghava Chari
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