Recently, a new client asked Howden Maintenance Partners for assistance in identifying the cause of strong vibrations in their turbine (ALSTOM type TM2, 22 MW). After the vibratory analysis carried out on-site, the diagnosis was indisputable: the steam turbine had to be opened for a more in-depth inspection. When it was opened, we observed that a seal of the watertight casing had shifted axially and was rubbing against wheel 1. The latter being severely damaged, the rotor was sent to our workshop in Belgium for repair.
After the visual, geometric and dimensional inspection and analysis of the material, it appeared that the damaged wheel had to be replaced.
However, thanks to our welding robot and the expertise of our engineers, HMP had the capability and know-how to repair this rotor and prevent the end client from having to procure a new rotor.
- The wheel is machined up to the shaft of the rotor.
- The reconstruction is carried out using our welding robot.
- We then proceed to the machining stage and actual fitting of the blades. The blades are attached in compression in accordance with the original design.
- The final step balancing the rotor in our high speed balancing machine.
The rotor is returned to the client after only 4 months of work, ready to be put back into production.
Result for the client:
- Works carried out with a high focus on safety and quality thanks to our MASE-, VCA/SCC- and ISO certifications
- A project managed A to Z by our teams: from on-site repair to return to service, including repair of the wheel and balancing of the rotor in our workshop
- Shorter delivery times and lower costs than ordering a completely new rotor
More information
If you have any questions about services on steam turbines, please contact us via +32(0)3 541 71 40 or send us a message using the form below: