Siemens Energy, Inc.

Shane Bell

Randy Edward Whitener

Robert Gore

Donald Yaffee

Alejandro Felix

A locking wedge system for securing a stator coil in a slot of a stator core includes a slot layer positioned on the stator coil to inhibit movement of the stator coil within the slot, an outer wedge including a first tapered surface, an inner locking wedge positioned on the slot layer, the inner locking wedge including a second tapered face that interfaces with the first tapered face, a locking member configured to lock the inner locking wedge to the stator core, and an interlocking mechanism to couple the outer wedge to the inner locking wedge.

Locking wedge system having opposing wedges with interlocking detent

A method for repairing a stator core of a generator is presented. The stator core includes laminations grouped into packs. A ventilation spacer is disposed between adjacent packs. Laminations are separated from each other by insulation layers. The ventilation spacer is removed between adjacent packs having a damaged insulation layer between the laminations to locally loosen the laminations in the adjacent packs which allows the damaged insulation layer between the laminations to be repaired. A new ventilation spacer is reinstalled between the adjacent packs where the ventilation spacer being removed to retighten the laminations in the adjacent packs after completion of the repair. The new ventilation spacer is adhesively secured between the adjacent packs.

Method for repairing generator stator core

A false tooth assembly for a generator stator core is presented. The false tooth assembly has a tapered shape including multiple tapered false tooth pieces. The multiple tapered false tooth pieces are installed into a damaged area in a tooth of a lamination of the stator core such that a wide end of the false tooth assembly is disposed into a wide opening of the damaged area and a narrow end of the false tooth assembly is flushed with a narrow opening of the damaged area at a tip of the tooth. The tapered shape of the false tooth assembly enables the false tooth assembly to fill the entire damaged area and to lock the false tooth assembly into the damaged area. The false tooth assembly can be used to repair stator core in any region of the stator core including step iron region without being dislodged during generator operation.

Growing community of inventors

Chuluota, FL, United States of America

Shane Bell