The damping platforms of the last-stage blades in Siemens turbines often break
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Our facility has two centrifugal compressors manufactured by Siemens (Huludao) Company, both of which are driven by steam turbines. In one of these turbines, the damping pads on the final stage blades break down every six months; the last time it broke, it was after less than two months of use. The final stage blades of the other turbine have been in use for three years, and they have now also broken. The manufacturer claims that there is no issue with the quality, but they are unable to identify the cause. We are seeking help from experts!
Personally, I think it might be related to water erosion; I’m not sure if there is any water erosion involved. Alternatively, it could be related to fatigue, as there are certain patterns in the fracture surfaces caused by fatigue.
Provide two detailed photos and say they’re useless; it’s impossible to make a judgment.
It might still be a problem with the material of the blade; please provide detailed photos of the rotor blade fracture!
I think resonance has occurred; for strength verification, according to API, one has to consider many levels of resonance strength, right? A chemical plant, right?
The unit in my company also comes from Huludao, Liaoning, and it has the same issue – a problem with the material of the blades