Practical Case Studies On Vibration Analysis Pdf !exclusive! -

3. Case Study: Resonant Frequencies and Structural Loose Behavior in a Motor-Gearbox Assembly The Problem

75 HP electric motor driving a conveyor gearbox. Speed: 1780 RPM. Bearings: SKF 6315 (Inner race and outer race). The Complaint: Squealing noise during startup, normalizing after 10 minutes. No temperature alarms. The Data: Acceleration envelope (gE) spectrum revealed a pattern of sidebands around 2.3 kHz. By calculating the bearing defect frequencies using a standard formula sheet (available in most vibration analysis PDF guides), the analyst identified: Practical Case Studies On Vibration Analysis Pdf

The fan was uncoupled, and the shaft was straightened via heat induction. Post-repair vibration dropped to 0.12 in/sec RMS. Practical Case Studies On Vibration Analysis Pdf