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Method for removing fluorescent liquid in aero-engine compressor casing

A technology for aero-engines and air compressors, applied in liquid cleaning methods, gas flow cleaning methods, cleaning methods and appliances, etc., can solve problems such as flaw detection sensitivity, contamination of the casing surface, imaging agent contamination, etc., to achieve The effect of improving the sensitivity of flaw detection, saving production costs and preventing misjudgment

Active Publication Date: 2015-03-25
中国航发贵州航空发动机维修有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing cleaning method is appearance washing, and appearance cleaning can only clean the penetrant on the surface, but the penetrant in the cavity cannot be completely removed, which will easily cause serious contamination of the imaging agent and affect the sensitivity of flaw detection
Due to unclean penetrant removal, the imaging agent is seriously polluted, which affects the sensitivity of flaw detection; during assembly, it is often found that there is fluorescent penetrant leaching from the pores of the casing, which pollutes the surface of the casing, resulting in unqualified appearance quality

Method used

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Embodiment Construction

[0007] The method for clearing the fluorescent liquid in the casing of the aero-engine compressor described in the present invention will be further described in terms of specific implementation. The first step of the method is to perform fluorescent flaw detection for the 3rd to 7th casings without decomposing the blades. , during the flaw detection process, when the fluorescent liquid is infiltrated and cleaned, first use the cold air and water vapor spray gun to blow the blade installation groove on the upper end surface of the 4th to 7th casing and the stop block installation place on the 3rd casing, so that The penetrating liquid flows out from the casing gap and another stop block installation, so that the distance between the nozzle and the parts is 30cm, and the maximum water pressure is 0.27Mpa. The permeate with a certain viscosity should be cleaned with hot water in winter. The temperature of the hot water is 30-50°C. After the permeate seeps out from the blade insta...

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PUM

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Abstract

The invention discloses a method for removing fluorescent liquid in an aero-engine compressor casing. The method is used for carrying out fluorescent flaw detection on blades of the 3-7-stage compressor casing and cleaning away penetrating liquid. Cold air and a water vapor spraying gun are adopted for purging a blade installation groove in the upper end face of the 4-7-stage part of the compressor casing and a stopping block installation site in the 3-stage part of the compressor casing so that the penetrating liquid can flow out from a casing gap or the other stopping block installation site; hot water is adopted for cleaning in winter, redundant penetrating liquid on the surface is cleaned away, and to prevent excessive cleaning, only the water vapor spraying gun and hot water can be adopted for cleaning rather than cold air is directly adopted for purging; the casing is placed in a developing tank for development after being dried. Post-cleaning is carried out on the casing after a flaw detection result shows that the casing is up to standard, and because a small amount of penetrating liquid which does not influence flaw detection quality remains in the gap, cleaning after flaw detection is necessary. The casing is placed in the hot water to be soaked, compressed air and the water vapor spraying gun are adopted for purging the blade installation groove in the upper end face of the 4-7-stage part of the compressor casing and the stopping block installation site in the 3-stage part of the compressor casing till no penetrating liquid flows out of the gap, and the casing is dried through a fan or an oven. By means of the method, the cost is lowered, the production cycle is shortened, and the production quality is improved.

Description

technical field [0001] The invention relates to a technology for removing fluorescent flaw detection liquid during engine maintenance, in particular to a method for removing fluorescent liquid in an air compressor case. technical background [0002] The structure of the aero-engine compressor casing is complicated. During the overhaul inspection, since the aero-engine compressor casing is used for fluorescent flaw detection without disassembling the blades, when the fluorescent flaw detection fluid is soaked, the fluorescent liquid is released from the blades and the casing shell. The gaps formed by the combination and the holes of the casing itself enter the inner cavity of the casing. The existing cleaning technology is to soak and rinse the appearance. The existing cleaning method is surface flushing, and surface cleaning can only remove the permeate on the surface, but the permeate in the cavity cannot be completely removed, which will easily cause serious contamination ...

Claims

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Application Information

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IPC IPC(8): B08B3/02B08B3/04B08B5/02
CPCB08B3/02B08B3/10B08B5/02B08B7/04B08B2203/007B08B2203/02
Inventor 李燕
Owner 中国航发贵州航空发动机维修有限责任公司
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