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Heavy-duty gas turbine coated turbine blade matrix crack eddy current detection system and method

A turbine blade and eddy current detection technology, applied in measuring devices, instruments, scientific instruments, etc., can solve problems such as large interference signals, easy lift-off and shaking, and inability to effectively detect cracks in the substrate of coated turbine blades. Achieve high signal sensitivity, easy disassembly, and reduce interference

Pending Publication Date: 2021-02-09
XIAN THERMAL POWER RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The blade shape of the turbine blade is an arc surface with a gradual curvature. During the eddy current detection process, it is easy to lift off and shake, resulting in a large interference signal, resulting in an increase in the probability of misjudgment and missed detection. Conventional eddy current detection systems and methods cannot detect Effective detection of cracks in coated turbine blade substrates and quantification of crack size

Method used

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  • Heavy-duty gas turbine coated turbine blade matrix crack eddy current detection system and method
  • Heavy-duty gas turbine coated turbine blade matrix crack eddy current detection system and method
  • Heavy-duty gas turbine coated turbine blade matrix crack eddy current detection system and method

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Embodiment 1

[0043] Such as Figure 1~3 As shown in the figure, an eddy current detection system for substrate cracks of coated turbine blades for heavy-duty gas turbines includes: eddy current meter 1, eddy current detection probe 2, comparison sample 3, and signal transmission line 4. The eddy current detection probe 2 is connected with the eddy current instrument 1, and a number of rectangular grooves are opened on the comparative sample 3.

[0044] This embodiment can specifically be realized like this:

[0045] 1) Make a manganese-zinc ferrite cylindrical magnetic core with a diameter of 1.5mm and a length of 5mm;

[0046] 2) Select a copper wire with a diameter of 0.06mm, and wind an eddy current detection excitation coil and a detection coil, the inner diameter of the coil is 2mm, and the outer diameter is 4mm;

[0047] 3) Put the eddy current detection excitation coil and detection coil on the magnetic core and fix them;

[0048] 4) Processing probe plastic steel shell 1, the oute...

Embodiment 2

[0066] Such as Figure 1~3 As shown in the figure, an eddy current detection system for substrate cracks of coated turbine blades for heavy-duty gas turbines includes: eddy current meter 1, eddy current detection probe 2, comparison sample 3, and signal transmission line 4. The eddy current detection probe 2 is connected with the eddy current instrument 1, and a number of rectangular grooves are opened on the comparative sample 3.

[0067] This embodiment can specifically be realized like this:

[0068] 1) Make two manganese-zinc ferrite cylindrical magnetic cores with a diameter of 2mm and a length of 6mm;

[0069] 2) Use copper wire with a diameter of 0.06mm to wind one excitation coil and one detection coil for eddy current detection, the inner diameter of the coil is 2mm, and the outer diameter is 4mm;

[0070] 3) Put the eddy current detection excitation coil and detection coil on the magnetic core and fix them;

[0071] 4) Processing probe plastic steel shell 1, the o...

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Abstract

The invention discloses a heavy-duty gas turbine coated turbine blade matrix crack eddy current detection system and method, and belongs to the field of nondestructive testing, and the detection system comprises an eddy current instrument, an eddy current detection probe and the like. The eddy current detection probe is connected with the eddy current instrument; a plurality of rectangular groovesare formed in the comparison sample. The detection method is high in sensitivity to crack signals of the turbine blade base body with the coating, the crack defect of the turbine blade base body withthe coating can be effectively detected, the minimum size of the crack defect is that the depth is 0.1 mm, and the length is 2 mm, the eddy current detection probe can be well attached to the blade profile, interference caused by shaking and lifting of the eddy current detection probe is reduced, the flexible rubber mud layer and the insulating tape layer of the sealing block at the bottom of theeddy current detection probe are convenient to disassemble and replace, eddy current signal alarm ranges are set in eddy current detection process parameters, a detector can clearly distinguish cracksignals from normal signals, and operation is simple and easy to learn.

Description

technical field [0001] The invention belongs to the technical field of eddy current detection, and in particular relates to an eddy current detection system and method for a substrate crack of a coated turbine blade of a heavy-duty gas turbine. Background technique [0002] Turbine blades are the core components of heavy-duty gas turbines and are made of high-temperature alloys with excellent high-temperature mechanical properties. In order to increase the service temperature, corrosion and oxidation resistance and prolong the service life of turbine blades, the surface of turbine blades is sprayed with thermal barrier coatings (Thermal Barrier Coatings, TBCs) or anti-oxidation coatings (Anti-Oxidation Coating, AOC). Manufactured from superalloys with excellent high temperature mechanical properties and resistance to oxidation and corrosion. During the service process of heavy-duty gas turbine blades, due to the combined effects of thermal stress, centrifugal stress (moving...

Claims

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Application Information

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IPC IPC(8): G01N27/90
CPCG01N27/90G01N27/9006
Inventor 肖俊峰高斯峰张炯高松李永君李园园唐文书南晴
Owner XIAN THERMAL POWER RES INST CO LTD