Vol. 51 No. 1 (2014)   New Products & Technologies
Technical Papers

Non-contact Vibration Measurement of the Rotor Blades that Play a Pivotal Role in the Reliability of Gas Turbines

KAZUHIRO TAMURA
MASAKI ONO
SHUNSUKE TORII
KAZUKI MORIMOTO

The commercial gas turbines of Mitsubishi Heavy Industries Ltd. (MHI) are not only high efficiency, but also designed based on the data accumulated through component tests and field tests, placing importance also on product reliability to assure our clients the safer and securer use of our products. In particular, the first-stage rotor blades of gas turbines are used in an extremely severe environment, that is, one with high temperature, strong centrifugal force and the greatest load. Therefore, it is important to demonstrate the validity of their vibration characteristics under actual operating conditions, from the viewpoint of blade damage prevention. In order to obtain more data on vibrations of the first-stage rotor blades of gas turbines in the environment of actual use, Mitsubishi Heavy Industries, Ltd. (MHI) has developed a non-contact blade vibration measurement technology that can be applied under high temperature gas conditions.