Eddy current infrared integrated detection system and method for typical defects of thermal barrier coating of reignition blade

Abstract

The invention discloses an eddy current infrared integrated detection system and method for typical defects of a thermal barrier coating of a reignition blade. The system comprises a signal excitation device, a synchronous triggering device, a water cooling device, a heating head, an excitation coil, a magnet yoke, an infrared camera, an array detection coil, a lock-in amplifier, a computer and the reignition blade. The signal excitation device generates excitation current which is led into the excitation coil through the heating head; the magnet yoke penetrates through the excitation coil to regulate and control the configuration of the magnetic field and enhance the detection effect; the excitation current is excited in the alloy blade base body covered with the thermal barrier coating to generate eddy current, and then Joule heat is generated; the infrared camera collects a surface temperature field of the blade and is used for representing debonding information of the coating; the array detection coil collects magnetic field distribution information on the surface of the coating, and the magnetic field distribution information is used for representing blade base body cracks and coating thickness distribution. Fusion and advantage combination of an infrared detection method and an eddy current detection method are realized in one set of system, and the problem of high-efficiency and high-precision in-situ synchronous detection of three typical defects of the thermal barrier coating is successfully solved.

Description

technical field [0001] The invention relates to a non-destructive testing composite system and method, in particular to an eddy current infrared integrated testing system and method for detecting typical defects of thermal barrier coatings of reburned blades. Background technique [0002] Heavy-duty gas turbine (referred to as re-ignition) is an important driving equipment. As a major power, it has the characteristics of high design complexity and high manufacturing difficulty. In the re-ignition structure, the turbine blades at the front end are impacted by the surrounding high-temperature and high-pressure gas, and improving the high-temperature resistance of the blades is the key to improving the re-ignition performance. The thermal barrier coating covering the surface of the turbine blade can effectively reduce the temperature of the blade and prevent the blade from being damaged in a high temperature environment. The main structure of the thermal barrier coating is the...

AI Technical Summary

Problems solved by technology

[0006] In view of the problems existing in the above existing methods and technologies, the purpose of the present invention is to develop an eddy current infrared integrated detection system and method for the detection of typical defects in the thermal barrier coating of reburning blades. By using a set of detection systems, the infrared and The integration and advantages of the two eddy current detection methods have successfully solved the problem of synchronous, high-efficiency, high-precision, and in-situ detection of various typical defects in thermal barrier coatings.

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