METHOD FOR INSPECTING A TURBINE ENGINE ROTOR WITH A ROTOR DISC CAVITY INSPECTION APPARATUS ΑΝD CORRESPONDING APPARATUS

摘要

Turbine engine rotor (24) corresponding thru-bolts (26) and disc cavities (30) are inspected with a camera inspection system that includes one or both of a thru-bolt male threads inspection apparatus (50) and a rotor disc cavity inspection apparatus (40). The disc cavity inspection scope apparatus is insertable in one or more of the desired rotor disc cavities (30) and orients an attached inspection camera field of view generally transverse to the circumferential wall in the rotor disc that defines the cavity. Preferably inspection scope apparatus insertion into the disc cavities is performed with a motion control system that monitors spatial position of the camera field of view relative to the recess circumferential wall. The plural camera cavity circumferential wall images are desirably combined to form a composite image of a desired portion of or the entire disc cavity circumferential surface, which aids their inspection evaluation and provides an archived composite image of the surface.