A PROBE HOLDING DEVICE CAPABLE OF REMOVING UNNECESSARY OVERRUN OF PROBE DURING ULTRASONIC TESTING OF ROTOR OF A STEAM TURBINE

摘要

A probe holding device capable of removing unnecessary overrun of probe during ultrasonic testing of rotor of a steam turbine comprising a probe fixed on the upper part (3) of device (P) by a socket head screw (1) and a threaded hole (2). The base (7) of the probe holding device (P) is fixed in a tool holder which in turn is fixed on the carriage of the machine. A guiding rod (5) is connected to upper body (3) through a threaded joint. A spring (6) is disposed inside the guiding rod (5) for avoiding stress on the probe during rotation of the rotor. The guide (4) touches the spring (6) on its one end. The ultra sonic testing is automated such that the probe covers the longitudinal distance in one rotation of the rotor equal to the longitudinal distance covered by tool holder and is equal to the width of the probe resulting elimination of the probe.