When the rotor touches the stator, the gap between them is broken. This is a serious malfunction: the contact destroys both the stator iron and the rotor, and then the winding fails. Let's look at the reasons.
Causes of contact
- Wear of bearings - the shaft sags, the rotor moves.
- Deflection or curvature of the shaft.
- Broken seatsof bearings in the shields.
- Weakening or displacement of the package iron.
- Assembly defectsafter poor-quality repairs.
Signs
| Sign | What does it mean |
|---|---|
| Metal grinding | Direct contact |
| Traces of rubbing on rotor/stator | Broken clearance |
| Strong vibration | Wear of bearings, imbalance |
| Overheating | Friction, winding damage |
What are the dangers
Balling quickly destroys the winding insulation and damages the iron package. Delay turns an inexpensive replacement of bearings into an expensive repair with rewinding and restoration of iron.
How to fix
Repair depends on the cause: replacing bearings, restoring seats, straightening or replacing the shaft, restoring the gap. The exact cause is determined by diagnostics with disassembly.
Do you hear a grinding or strong vibration of the engine in Tashkent? Elektromotors engineers will eliminate the interference and restore the gap - leave a request.