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Hi All,
we had a ratchet pump failure failure on our GE Frame 6B gas turbine. it happened when coming off load. We found the ratchet pump motor mountings undone and the supply oil pipe fractured. the motor drive end bearing was disintegrated and entered the motor winding causing burn out. We did not do any ratcheting after the load run. we couldn't use the starting diesel engine to rotate the rotor either because hydraulic ratchet pump is also used to engage the clutch and possibly. also the diesel engine cannot get the turbine turning on it's own, maybe it needs to ratchet to get it started.
Anyway my question is: what should we expect when we try to turn the rotor on ratchet then on crank using the diesel engine. If the rotor is bent and there are high vibes, what is the next step?
Thanks for any advice.
Regards,
David
we had a ratchet pump failure failure on our GE Frame 6B gas turbine. it happened when coming off load. We found the ratchet pump motor mountings undone and the supply oil pipe fractured. the motor drive end bearing was disintegrated and entered the motor winding causing burn out. We did not do any ratcheting after the load run. we couldn't use the starting diesel engine to rotate the rotor either because hydraulic ratchet pump is also used to engage the clutch and possibly. also the diesel engine cannot get the turbine turning on it's own, maybe it needs to ratchet to get it started.
Anyway my question is: what should we expect when we try to turn the rotor on ratchet then on crank using the diesel engine. If the rotor is bent and there are high vibes, what is the next step?
Thanks for any advice.
Regards,
David