Early detection allowed for a planned replacement during a scheduled outage, preventing an unplanned shutdown of the high-speed paper machine. 2. Case Study: Standby Fan Motor "False Brinelling"
Findings:
Heavy-duty planetary gearbox in a crane hoist. Ratio: 35:1. Input speed: 1750 RPM. The Complaint: Low-frequency "thumping" under load. No oil debris yet. The Challenge: Planetary gearboxes are notoriously difficult to analyze because the planet gears rotate around the sun gear, modulating the vibration signal. Practical Case Studies On Vibration Analysis Pdf
It is recommended that all critical rotating assets be included in a routine vibration monitoring route, with emphasis on trending data over time rather than relying on single data points. Early detection allowed for a planned replacement during