Unlock instant, AI-driven research and patent intelligence for your innovation.

Heavy-duty gas turbine blade TBCs interlayer crack eddy current detection system and method

A turbine blade and eddy current detection technology, applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of increased misjudgment and missed detection, easy lift-off and shaking, large interference signals, etc., to reduce interference , Low sensitivity to signal interference, high signal sensitivity

Pending Publication Date: 2021-02-09
XIAN THERMAL POWER RES INST CO LTD
View PDF6 Cites 2 Cited by
  • 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, and it is easy to lift off and shake during the eddy current detection process, resulting in a large interference signal, resulting in an increased probability of misjudgment and missed detection.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Heavy-duty gas turbine blade TBCs interlayer crack eddy current detection system and method
  • Heavy-duty gas turbine blade TBCs interlayer crack eddy current detection system and method
  • Heavy-duty gas turbine blade TBCs interlayer crack eddy current detection system and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Such as Figure 1~3 As shown, an eddy current detection system for interlayer cracks in TBCs of heavy-duty gas turbine blades includes: eddy current instrument 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.

[0046] This embodiment can specifically be realized like this:

[0047] 1) Make a manganese-zinc ferrite cylindrical magnetic core with a diameter of 1.5mm and a length of 5mm;

[0048]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;

[0049] 3) Put the eddy current detection excitation coil and detection coil on the magnetic core and fix them;

[0050] 4) Processing probe plastic steel shell 1, the outer diameter is 6mm; ...

Embodiment 2

[0068] Such as Figure 1~3 As shown, an eddy current detection system for interlayer cracks in TBCs of heavy-duty gas turbine blades includes: eddy current instrument 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.

[0069] This embodiment can specifically be realized like this:

[0070] 1) Make a manganese-zinc ferrite cylindrical magnetic core with a diameter of 1.5mm and a length of 5mm;

[0071] 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;

[0072] 3) Put the eddy current detection excitation coil and detection coil on the magnetic core and fix them;

[0073] 4) Processing probe plastic steel shell 1, the outer diameter is 6mm;...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
diameteraaaaaaaaaa
lengthaaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a heavy-duty gas turbine blade TBCs interlayer 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 grooves are formed in the comparison sample. The eddy current testing system is high in sensitivity to turbine blade TBCs interlayer crack signals, turbine blade TBCs interlayer crack defects with the minimum sizeof 0.1 mm in depth and 2 mm in length can be effectively detected, the eddy current testing probe can be well attached to a blade profile, interference caused by shaking and lifting of the eddy current testing probe is reduced, the flexible rubber mud layer and the insulating tape layer of the sealing block at the bottom of the eddy 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 crack signals 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 TBCs interlayer cracks of heavy-duty gas turbine blades. Background technique [0002] Turbine blades are the core components of heavy-duty gas turbines, made of high-temperature alloys with excellent high-temperature mechanical properties and oxidation and corrosion resistance. In order to further increase the service temperature, corrosion and oxidation resistance and prolong the service life of the turbine blades, thermal barrier coatings (Thermal Barrier Coatings, TBCs) are sprayed on the surface of the turbine blades. TBCs are composed of a surface ceramic layer and a bonding layer. The surface ceramic layer mainly plays the role of heat insulation and cooling. The function of the bonding layer is to reduce the stress caused by the mismatch of thermal expansion coefficient between the ceramic layer an...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/90
CPCG01N27/90G01N27/9006
Inventor 肖俊峰高斯峰李永君李园园张炯高松南晴唐文书
Owner XIAN THERMAL POWER RES INST CO LTD