| 摘要 |
PROBLEM TO BE SOLVED: To improve the measuring accuracy of the clearance between a blade and a casing.SOLUTION: A clearance measuring apparatus comprises: a sensor unit 20 that is fixedly installed at a casing 10 covering a rotor 9 and that is configured so that a plurality of sensors each capable of detecting a capacitance in response to a clearance between the casing 10 and blades Y1, Y2, and the like rotating about a rotational axis of the rotor 9 is disposed at different positions in a rotational axis direction of the rotor 9; a deviation width identification unit identifying deviation widths in the rotational axis direction of the blades Y1, Y2, and the like on the basis of the capacitance detected by the respective sensors; and a clearance identification unit identifying the clearance between the casing 10 and the blades Y1, Y2, and the like on the basis of the deviation widths identified by the deviation width identification unit and the capacitance detected by the respective sensors. |
