PROCEDURE FOR MEASUREMENT OF COORDINATE CONSTITUENTS OF OFFSET OF ENDS OF TURBO-MACHINES ROTOR BLADES Russian patent published in 2010 - IPC G01B7/14 

FIELD: machine building.

SUBSTANCE: by means of three high-temperature single-turn vortex-current converters there is performed separate determination of offset of ends of blades in radial and axial directions and in direction of rotor rotation. The converters are distributed on a stator shell within three sections of its surface. At each section there is chosen one point in the range of sensitivity of a corresponding converter. The first and the second point are spaced one from another at one and a half angular pitch of blade installation of a rotor wheel, while the second and the third points are spaced at one angular pitch in the direction of rotor rotation. Conversion of inductivity of sensor elements into voltages and registration of corresponding codes is carried out in three stages: at the first stage results of conversion are registered at the moments, when locks of all blades of the wheel pass the first point; at the second and third stage - when they pass the third point. Also the first and second sensor elements correspondingly function as operating and compensating at the first stage, the second and the first ones - at the second stage, and the third and the first sensor elements correspondingly - at the third stage.

EFFECT: reduced expenditure for instrumentation at maintaining information value of measurement.

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