| 摘要 |
PURPOSE: To decrease the influence of a capacitance of a sensor based on an axial movement of a rotor blade by exceeding a length of an electrode that swept by a rotor blade tips which is provided on a casing liner. CONSTITUTION: An electrode 16 is provided on a casing liner 10 that remotes toward a radial direction from a rotor blade 22 with insulating from the casing liner 10 and a condenser is constituted between the electrode 16 and the rotor blade 22. The axial length of the electrode 16 exceeds that swept by the rotor blade tips and is sufficient for any axial movement of the rotor blades under operating conditions so as to decrease an influence of the capacitance of the sensor. |
