METHOD OF MEASURING AND MONITORING RADIAL AXIAL CLEARANCES IN TURBO-MACHINES AND DEVICE FOR REALIZATION OF THIS METHOD

摘要

FIELD: monitoring radial axial clearances between working blades and body of turbo-machines. ^ SUBSTANCE: wearable coat is applied on inner surface of turbo-machine body above working wheel blades over entire circumference. One or several strips made from current-conducting material are applied on wearable coat forming ring-shaped electrodes of capacitance sensor. Thickness of strips is dictated by permissible clearances between end surface of blades and surface of wearable coat. Magnitude of integral clearance during rotation of turbo-machine in working modes is determined by amplitude of output voltage of sensor. Extension of blades of turbo-machine rotors are found by difference between magnitude of static and integral clearances. Limiting magnitude of clearances at contact of electrodes of capacitance sensor with end faces of working blades is registered. ^ EFFECT: enhanced efficiency and reliability of measurements of limiting and permissible magnitudes of radial axial clearances. ^ 4 cl, 3 dwg