Patent ID: 9726628
Date: 2017-08-08
CPC Classifications: F01D,F05D,G01N

Claim:
1. A system for performing acoustic thermography inspection of turbine blades while the turbine blades are in place in an assembled turbine, said system comprising: an acoustic thermography stack that includes a horn, a piezoelectric portion, a booster and a cap; a frame that the acoustic thermography stack is slidably mounted to said frame including an end frame portion with a blade stop; an air cylinder that provides force to move the acoustic thermography stack up and down a rail of the frame such that a turbine blade may be clamped between the cap and the blade stop and then excited using the acoustic thermography stack; and an infrared camera, said infrared camera being used to detect critical indications in the turbine blade that is clamped between the cap and the blade stop and then excited, wherein the cap is made of brass, copper, or a mixture that includes copper and brass.