When a marine gas turbine is installed on the ship, the alignment among the power turbine, the output shaft and the reduction gearbox needs to be examined and adjusted precisely. After a long period of gas turbine operation, the alignment of the shafting needs be reviewed and adjusted regularly according to relevant regulations as well.
The paper introduces an alignment monitoring device, by which the alignment of the shafting under static and dynamic conditions can be acquired at any time. The device has been verified by real shipboard tests and the on-condition maintenance can be realized. The device can reduce significantly the workload of scheduled maintenance and can be used as a recorder for the responds of gas turbine against various dynamic shocks.
