Patent ID: 6019001
Filing Date: 2000-02-01
Classification: G01N

Abstract:
A method for ultrasound testing of a wheel disc of a turbine rotor shrunk onto a turbine shaft, in a region of a shrink seating and of an adjacent shrinkage influence zone, the wheel disc having side pieces which taper inwardly in a direction radially outward from the region of the shrink seating, the method comprising:scanning the contour of the wheel disc;determining a geometric reflection surface for which occurrences of defects must be taken into account;deriving a wheel disc geometry from the results of said scanning the contour and said determining a geometric reflection surface;determining test parameter and test positions according to a predetermined test technique for ultrasound test heads, taking into account the wheel disc geometry; andcoupling ultrasound test heads, using the determined test parameters, to the side pieces and testing along defined test paths.