Summary
The paper reports the diagnosis of severe vibration in a 200 MW Kaplan hydro generator
Read more Read less(UG01), traced to stator ovalization that produces dynamic rotor eccentricity and strong
Unbalanced Magnetic Pull, causing large asymmetric shaft displacements that nearly reach the generator guide bearing clearance and create high rubbing risk; by combining long‑term vibration trends, orbital analysis, oil tribology, historical air‑gap measurements, and an extraordinary inspection, the authors confirm out‑of‑tolerance stator geometry and bearing clearance deviations, show that the Babbitt lining remains intact despite increased metallic particles in the oil, and recommend intensified monitoring, installation of air‑gap sensors, and stator repair to restore geometric conformity and prevent catastrophic failure
Additional informations
| Publication type | Session Materials |
|---|---|
| Reference | A1_10796_2026 |
| Publication year | |
| Publisher | CIGRE |
| Country | Brazil |
| Study committees | |
| File size | 1 MB |
| Price for non member | 30 € |
| Price for member | 30 € |
Authors
MATSUO Tiago Kaoru - AQTech Brazil; NASCIMENTO Emerson - AQTech Brazil; MATOS Rafael - AQTech Brazil; KLEIS Thiago - AQTech Brazil; SILVA Pedro - AQTech Brazil
Keywords
Condition monitoring, stator ovalization, vibration analysis, operational strategy
