Radial clearance determination

摘要

The gas turbine engine (1) has a shaft (9) carrying turbine blades and compressor blades (13). Stator blades (11) are mounted in the fixed casing (3) and extend inward toward the shaft. A signal transmitter (22) is mounted on the shaft and rotates past a signal receiver (24) mounted in the tip of a stator blade. An alternating signal is produced which may be interpreted to give a reading of the distance.