Can you refer some good books that give me good insight into Turbine maintenance . I am already reading william Sanders book " Turbine steam path maintenance and repair "
Thanks Pellin, I will share pictures of cracked blades once I get from office. Sudden condensation of flash steam on last stage can create large void that is sometimes filled rapidly by adjacent condensate. This process can result in shock waves known as hammering. Rapid collapse of the flash...
Thanks, We have water chemistry issues problem in our previous plant. We observed concentration of chlorides to get high sometimes in condenser hot-well. It might be due to condenser tubes leakage. But on the other hand,those low pressure turbines experienced cracks in last stages leading to...
Thanks J. Pellin for valuable input. Can pitting lead to developing cracks in blades ?
I feel that pitting may be one of reason of building cracks in rotating blades of sixth stage in our 1st power plant . Still, no certain reason has been found for those blade cracks
It means that we have to live with moisture pitting because we have LP turbine exhaust temperature & condenser vacuum limitations. We replaced the rotary blades of sixth stage of other same steam type turbine of Sister power plant due to cracks revealed during NDT inspection.
By the way, I am...
We observed the same phenomenon of cracks in last stage of reaction turbine. Plants is tripped on high vibration if there occurs turbine dynamic imbalance due to breakage of blades. Vibration of journal bearings across turbine rotor is mirror for turbine behaviour.
Pitting was observed on the rotary blades of last stages of low pressure turbine. What can be reasons and consequences of pitting? How can we avoid it?
