We are having an issue on Solar titan gas turbines during start up. The maximum speed is 11,197 rpm for the turbine. It is connected to alternator with planetary gear box. High vibration on bearing 1 which is at cold side. Alarm value set is 63.5 microns and we got highest vibration yesterday is 72 microns.
High vibration only occurs at 40 to 45% of turbine's rpm. Once it crosses that range the vibration goes down and got stable about 25 microns. There is no overhauling or other work is done in the past year. I am suspecting the oil whirl is the issue. But need suggestion from you guys. Thank you
High vibration only occurs at 40 to 45% of turbine's rpm. Once it crosses that range the vibration goes down and got stable about 25 microns. There is no overhauling or other work is done in the past year. I am suspecting the oil whirl is the issue. But need suggestion from you guys. Thank you