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What are the possible solutions to this vibration.
Could be several causes, one of the most common is the rotor plastic flexture. If you leave a long rotor within the machine or outside and don´t rotate on a regular basis, it will bend and when installed, it will develop vibrations.
The rotors tend to flex under their own weight and if left unnatended enough, this flexion could be permanent so it is highly advisable to rotate them ia 180º pattern.
1 foundation Bolts & grouting problem
2 misalignment & casing bolts loos or broken
3 turbine bearing wear tear due to lubrication failure
4 uneven burning due to air fuel ration
5 turbine & compressor rotor blades damage
6 due to generator load variation & turbine run at over speed
7 rotor bends or Bow
8 rotor balancing issue
9 Exhaust pressure issue
There are many causes but most common are these
Missallignment
Loosing of Foudation Bolts
Rotor Unbalancing
Wear tear of rotating part
Bearing Problem
bad shaft alignment and bad flame dynamics
Please be aware of the natural frequency of the rotor. I mean wheather the equipment is running above the first critical speed. so always there may be high vibration while the machine croses its natural frequency.
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