Root Cause Analysis (RCA) provides a solution to Reformer Fan Bearing Change Times cut by 90%.
Article Type: | Root Cause Analysis (RCA) |
Category: | Mechanical |
Equipment Type: | Miscellaneous Rotating Machine Problems |
Author: | S. Raghava Chari |
Note: This root cause analysis (RCA) is from real-time scenarios that happened in industries during the tenure of two or three decades ago. These articles will help you to improve your troubleshooting skills and knowledge.
Unbolt the over 250 Nos. 10 mm dia casing bolts
Position a crane suitably before plant shutdown (SD), after SD lift the casing upper half (above figure), place it nearby; lift the rotor 20 mm using a chain pulley block suspended from crane hook for Antifriction bearings (AFB) pull out; change the failed AFB, assemble back, etc.
Though the crew assured the instruction manual offered no easier bearing changing method, the author felt designers would have envisaged an easier bearing changing method:
He carefully viewed the fan 10 minutes and suggested to replace the AFBs thus:
The plant resumed full capacity production within 3 hours and with just a few easy maintenance efforts and needless 13 hours ½ capacity runs.
Author: S. Raghava Chari
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