Eddy current probe for inspecting interiors of gas turbines, sai

Details Eddy current probe for inspecting interiors of gas turbines, sai Eddy current probe for inspecting interiors of gas turbines, sai

1977-06-14

1979-02-13

Corcoran, Robert J.

Electricity: measuring and testing

Magnetic

Magnetic sensor within material

G01R 3312

Patent

active

041398220

ABSTRACT:
An eddy-current crack detection probe is described which allows inspection of turbomachinery parts of conductive material for cracks without removal of the parts to be inspected from the machine or disassembly of the casings normally restricting physical access to these parts. The crack detection probe is particularly useful for field inspections of the trailing edges of turbine buckets of a gas turbine for cracks not readily detectable by optical techniques. The probe, which is insertable through a small opening in the turbomachine casing and thereafter can be remotely manipulated to assume an appropriate inspection position, includes a small eddy-current sensor and may include a borescope for remote viewing of the sensor and turbine bucket edge to be inspected.

REFERENCES:
patent: 3153286 (1964-10-01), Buisson
patent: 3949292 (1976-04-01), Beaver et al.
patent: 3990301 (1976-11-01), Smith

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