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Heavy-duty gas turbine turbine blade matrix crack eddy current detection probe with coating and manufacturing method
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A technology for eddy current detection probes and turbine blades, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of unsuitable turbine blades, lifting and shaking, and inability to fit, so as to facilitate disassembly and reduce signal Interference, low sensitivity effects
Pending Publication Date: 2021-02-09
XIAN THERMAL POWER RES INST CO LTD
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The blade shape of the turbine blade is an arc surface with gradually changing curvature. The existing turbine blade eddy current detection probe cannot effectively fit the blade surface at different positions during the detection process, which is prone to lift-off and shaking, resulting in large Interference signals, resulting in an increase in the probability of misjudgment and missed detection, not suitable for the detection of crack defects in the turbine blade substrate
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Embodiment 1
[0038] like figure 1 As shown, the heavy-duty gas turbine coated turbine blade substrate crack eddy current detection probe provided by the present invention includes an excitation core 1, a detection core 2, an excitation coil 3, a detection coil 4, a casing 5, and a hard rubber layer 6. Flexible rubber mud layer 7, insulating tape layer 8, and signaltransmission line 9.
[0039] This embodiment can specifically be realized like this:
[0040] 1) Make two manganese-zinc ferrite cylindrical magnetic cores, the diameter of the magnetic core is 1.5mm, and the length is 5mm;
[0041] 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;
[0042] 3) Put the eddy current detection excitation coil and detection coil on the magnetic core and fix them;
[0043] 4) Processing probe plastic steel shell 1, the outer diameter is 6mm;
[0044] 5) ...
Embodiment 2
[0057] like figure 1 As shown, the heavy-duty gas turbine coated turbine blade substrate crack eddy current detection probe provided by the present invention includes an excitation core 1, a detection core 2, an excitation coil 3, a detection coil 4, a casing 5, and a hard rubber layer 6. Flexible rubber mud layer 7, insulating tape layer 8, and signaltransmission line 9.
[0058] This embodiment can specifically be realized like this:
[0059] 1) Make two manganese-zinc ferrite cylindrical magnetic cores with a diameter of 2mm and a length of 6mm;
[0060]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;
[0061] 3) Put the eddy current detection excitation coil and detection coil on the magnetic core and fix them;
[0062] 4) Processing probe plastic steel shell 1, the outer diameter is 7mm;
[0063] 5) Make a sealing hard rubbe...
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Abstract
The invention discloses a heavy-duty gas turbineturbine blade matrix crack eddy current detection probe with a coating and a manufacturing method, and belongs to the field of nondestructive testing,and the probe comprises a magnetic core, an excitation coil, a detection coil, a shell, a probe bottom sealing block and the like. The manufacturing method comprises the following steps: manufacturingthe cylindrical magnetic core; winding an excitation coil and a detection coil; processing a probe shell; manufacturing a probe bottom sealing block; plugging the bottom of the shell by using a probebottom sealing block; and connecting a signaltransmission line. The eddy current detection probe is high in sensitivity to crack signals of a turbine blade matrix with a coating, can be well attached to a blade profile, reduces interference caused by probe shaking and lifting, and can effectively detect crack defects of the turbine blade matrix with the coating, the minimum size of which is thatthe depth is 0.1 mm and the length is 2 mm, the flexible rubber mud layer and the insulating tape layer of the probe bottom sealing block are convenient to disassemble and replace.
Description
technical field [0001] The invention belongs to the technical field of eddy current detection, and in particular relates to an eddy current detection probe and a manufacturing method of 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. The working environment of turbine blades is harsh, and due to the combined effects of thermal stress, centrifugal stres...
Claims
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