CN109211864B - Fluorescence penetration detection method and detection clamp - Google Patents
Fluorescence penetration detection method and detection clamp Download PDFInfo
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- CN109211864B CN109211864B CN201811292378.8A CN201811292378A CN109211864B CN 109211864 B CN109211864 B CN 109211864B CN 201811292378 A CN201811292378 A CN 201811292378A CN 109211864 B CN109211864 B CN 109211864B
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- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/64—Fluorescence; Phosphorescence
- G01N21/6428—Measuring fluorescence of fluorescent products of reactions or of fluorochrome labelled reactive substances, e.g. measuring quenching effects, using measuring "optrodes"
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/64—Fluorescence; Phosphorescence
- G01N21/6428—Measuring fluorescence of fluorescent products of reactions or of fluorochrome labelled reactive substances, e.g. measuring quenching effects, using measuring "optrodes"
- G01N2021/6439—Measuring fluorescence of fluorescent products of reactions or of fluorochrome labelled reactive substances, e.g. measuring quenching effects, using measuring "optrodes" with indicators, stains, dyes, tags, labels, marks
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Abstract
The invention discloses a fluorescence penetration detection method and a detection clamp, the fluorescence penetration detection method is used for detecting the surface quality of a small turbine blade with an air film hole, and comprises the following steps: applying a penetrant to the surface of the turbine blade by adopting an electrostatic spraying method; removing the redundant penetrating agent on the surface of the turbine blade; drying the turbine blade with the surface redundant penetrating agent removed; developing after applying a developer to the surface of the dried turbine blade; and (5) placing the developed turbine blade under a black light lamp for inspection, and judging whether the surface quality of the turbine blade is qualified. According to the fluorescence penetration detection method, the penetrating agent is applied to the surface of the turbine blade by adopting the electrostatic spraying method, so that the phenomenon that the excessive penetrating agent enters the inner cavity of the blade body of the turbine blade and the cooling channel to cause that the redundant penetrating agent in the inner cavity of the turbine blade and the cooling channel cannot be completely removed to influence the judgment of the detection result is avoided.
Description
Technical Field
The invention relates to the technical field of nondestructive testing of turbine blades, in particular to a fluorescence penetration testing method for testing the surface quality of a small turbine blade with an air film hole, and further relates to a testing clamp for placing the turbine blade in the fluorescence penetration testing method.
Background
The adoption of the air-cooled hollow turbine blade is one of the important technologies for improving the front temperature of the turbine of the aircraft engine, and along with the continuous improvement of the front temperature and the thrust-weight ratio of the turbine of the aircraft engine, the turbine blade must be designed into an air-cooled structure with a complex inner cavity so as to meet the requirements of the turbine blade on working in extremely harsh environments such as high temperature, high pressure, high revolution, complex stress, gas corrosion and the like. As a plurality of fine and complex cooling channels are adopted in the turbine blade to realize convection, impact and local air film cooling on the blade, the air cooling structure of the inner cavity of the turbine working blade is increasingly complex, the number of air film holes for communicating the blade body with the complex inner cavity of the blade is more and more, and the aperture of the air film holes of the small turbine blade is also smaller and more.
In the prior art, the surface quality of a turbine blade is generally detected by a fluorescence penetration detection method, which is a nondestructive detection method for detecting the opening defect of the surface of a non-porous material and a part, namely, after the turbine blade permeates in a penetrant, the penetrant permeates into the opening defect of the surface under the action of a capillary phenomenon, redundant penetrant on the surface is removed by emulsification, after drying, a thin layer of uniform developer is applied to the surface of the turbine blade, the penetrant permeated into the defect is adsorbed to the surface of the blade again under the action of the capillary phenomenon of the developer, and the inspection is carried out under a black light lamp, so that whether the surface quality of the turbine blade is qualified is judged, and for detecting the surface quality of the small turbine blade (the length and the width of which are both less than 50mm) with the film holes, if a conventional fluorescence penetration detection method is adopted, the penetrant is easy to remain in the inner cavity of the blade body and, residual penetrant reversely permeates to the surface of the turbine blade during development, and a yellow-green fluorescent background is formed under a black light lamp, so that the detection cannot be carried out.
Disclosure of Invention
The invention provides a fluorescence penetration detection method and a detection clamp, which aim to solve the technical problem that the surface quality of a small turbine blade with an air film hole cannot be detected by the existing fluorescence penetration detection method.
According to one aspect of the invention, a fluorescence penetration detection method is provided for detecting the surface quality of a small turbine blade with an air film hole, and comprises the following steps: applying a penetrant to the surface of the turbine blade by adopting an electrostatic spraying method; removing the redundant penetrating agent on the surface of the turbine blade; drying the turbine blade with the surface redundant penetrating agent removed; developing after applying a developer to the surface of the dried turbine blade; and (5) placing the developed turbine blade under a black light lamp for inspection, and judging whether the surface quality of the turbine blade is qualified.
Further, the penetrant is applied to the surface of the turbine blade by adopting an electrostatic spraying method, and the method comprises the following steps: connecting the turbine blade with the anode and grounding, connecting the osmotic agent output end in the spray gun with the cathode, forming an electrostatic field between the output end of the spray gun and the turbine blade, and adsorbing the osmotic agent sprayed out of the spray gun on the surface of the turbine blade through the electrostatic field; and standing the penetrant for 10-70 minutes after the penetrant is adsorbed on the surface of the turbine blade, so that the penetrant can fully permeate into the opening defect on the surface of the turbine blade, and simultaneously, the redundant penetrant in the outer surface of the turbine blade, the inner cavity of the blade body of the turbine blade and the cooling channel can be dripped.
Further, placing a plurality of turbine blades on a detection clamp, connecting the detection clamp with the anode, then grounding, and connecting the penetrant output end in the spray gun with the cathode to form an electrostatic field between the output end of the spray gun and the plurality of turbine blades; the spray gun sprays for 10 seconds to 30 seconds to enable the sprayed penetrant to be adsorbed on the surfaces of a plurality of turbine blades.
Further, removing the redundant penetrating agent on the surface of the turbine blade, comprising the following steps: pre-washing the turbine blade; preliminarily emulsifying the turbine blade which is washed in advance; carrying out intermediate water washing on the preliminarily emulsified turbine blade under a black light lamp to form a uniform penetrant thin layer on the surface of the turbine blade; supplementing and emulsifying the turbine blade which is washed by the middle water; and finally washing the supplemented and emulsified turbine blades under a black light lamp to remove the emulsified penetrant on the surfaces of the turbine blades.
Further, the preliminary emulsification and the supplementary emulsification comprise the following steps: selecting an emulsifier matched with the penetrant, and determining the total emulsifying time required for the emulsifier to emulsify the penetrant on the surface of the turbine blade through tests; allocating the time of primary emulsification and the time of supplementary emulsification according to the total emulsification time, wherein the time of primary emulsification is 0.5-0.6 times of the total time, and the time of supplementary emulsification is 0.4-0.5 times of the total time; both after the preliminary and after the supplementary emulsification, it is necessary to immediately immerse the turbine blades in water and quickly remove the turbine blades to stop the reaction of the emulsifier with the penetrant on the surface of the turbine blades.
Further, the pre-washing, the intermediate washing and the final washing are all sprayed by a spray gun, the water pressure is not more than 0.27MPa, and the distance between the nozzle of the spray gun and the surface of the turbine blade is more than or equal to 300 mm.
Further, the turbine blade with the surface redundant penetrant removed is directly placed in a hot air circulation oven to be dried, the drying temperature is not more than 70 ℃, and the drying time is not more than 10 minutes.
Further, the dried turbine blade is placed under a black light lamp for inspection, and the method comprises the following steps: placing the dried turbine blade in a developing tank and applying a developing agent matched with the penetrating agent to the surface of the dried turbine blade; and standing for less than 20 minutes to enable the developer to adsorb the penetrant in the opening defect on the surface of the turbine blade to the surface of the turbine blade for developing.
Further, after judging whether the surface quality of the turbine blade is qualified, the method also comprises the following steps: and soaking qualified turbine blades in warm water at the temperature of 30-45 ℃ for 5-15 minutes to clean and dry the developer and the penetrant on the surfaces of the turbine blades.
The invention discloses a detection clamp which is used for placing a turbine blade in the fluorescence penetration detection method and comprises a supporting mechanism, wherein a net-shaped structure for placing the turbine blade is arranged on the supporting mechanism, the tenon of the blade faces upwards, the turbine blade is hung on the net-shaped structure through a flange plate, the height of the net-shaped structure is larger than the blade body length of the turbine blade, the net-shaped structure comprises a longitudinal lead and a transverse lead interwoven with the longitudinal lead, the longitudinal lead is formed by weaving a fish wire and a copper wire, and the transverse lead is a fish wire.
The invention has the following beneficial effects:
the fluorescence penetration detection method of the invention applies the penetrating agent to the surface of the turbine blade by adopting the electrostatic spraying method, the penetrating agent is adsorbed on the surface of the turbine blade under the action of the electrostatic field, thereby preventing excessive penetrant from entering the inner cavity of the blade body of the turbine blade and a cooling channel through the film holes of the blade body of the turbine blade, causing the excessive penetrant in the inner cavity of the blade body of the turbine blade and the cooling channel to be unable to be completely removed to affect the judgment of the detection result, and the electrostatic spraying can enhance the adhesive force of the penetrant to the surface of the turbine blade, so that the penetrant is tightly contacted with the surface to be detected, and the penetrant is favorably permeated into the opening defect on the surface of the turbine blade, therefore, the sensitivity is higher, the detection of the surface micro-defect is favorably realized, and the turbine blade surface penetrating agent is more uniform, so that the subsequent removal of the redundant penetrating agent on the surface is facilitated, and the detection efficiency is also improved.
In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic flow chart of a fluorescence penetration detection method according to a preferred embodiment of the present invention.
Detailed Description
The embodiments of the invention will be described in detail below with reference to the accompanying drawings, but the invention can be embodied in many different forms, which are defined and covered by the following description.
FIG. 1 is a schematic flow chart of a fluorescence penetration detection method according to a preferred embodiment of the present invention.
As shown in fig. 1, the fluorescence penetration detection method of the present embodiment is used for detecting the surface quality of a small turbine blade with an air film hole, and includes the following steps: applying a penetrant to the surface of the turbine blade by adopting an electrostatic spraying method; removing the redundant penetrating agent on the surface of the turbine blade; drying the turbine blade with the surface redundant penetrating agent removed; developing after applying a developer to the surface of the dried turbine blade; and (5) placing the developed turbine blade under a black light lamp for inspection, and judging whether the surface quality of the turbine blade is qualified. The fluorescence penetration detection method of the invention applies the penetrating agent to the surface of the turbine blade by adopting the electrostatic spraying method, the penetrating agent is adsorbed on the surface of the turbine blade under the action of the electrostatic field, thereby preventing excessive penetrant from entering the inner cavity of the blade body of the turbine blade and a cooling channel through the film holes of the blade body of the turbine blade, causing the excessive penetrant in the inner cavity of the blade body of the turbine blade and the cooling channel to be unable to be completely removed to affect the judgment of the detection result, and the electrostatic spraying can enhance the adhesive force of the penetrant to the surface of the turbine blade, so that the penetrant is tightly contacted with the surface to be detected, and the penetrant is favorably permeated into the opening defect on the surface of the turbine blade, therefore, the sensitivity is higher, the detection of the surface micro-defect is favorably realized, and the turbine blade surface penetrating agent is more uniform, so that the subsequent removal of the redundant penetrating agent on the surface is facilitated, and the detection efficiency is also improved.
Applying a penetrant to the surface of the turbine blade by using an electrostatic spraying method, comprising the following steps: connecting the turbine blade with the anode and grounding, connecting the osmotic agent output end in the spray gun with the cathode, forming an electrostatic field between the output end of the spray gun and the turbine blade, and adsorbing the osmotic agent sprayed out of the spray gun on the surface of the turbine blade through the electrostatic field; and standing the penetrant for 10-70 minutes after the penetrant is adsorbed on the surface of the turbine blade, so that the penetrant can fully permeate into the opening defect on the surface of the turbine blade, and simultaneously, the redundant penetrant in the outer surface of the turbine blade, the inner cavity of the blade body of the turbine blade and the cooling channel can be dripped. However, after the penetrant is adsorbed on the turbine blade surface, if the standing time is too short, the penetrant cannot sufficiently penetrate into the opening defect on the turbine blade surface, and if the standing time is too long, drying of the penetrant is likely to occur, which is not favorable for defect detection and subsequent emulsification removal of the penetrant.
The method for adsorbing the penetrant sprayed by the spray gun on the surface of the turbine blade comprises the following steps: placing a plurality of turbine blades on a detection clamp, connecting the detection clamp with a positive electrode, then grounding, connecting an osmotic agent output end in a spray gun with a negative electrode, and forming an electrostatic field between the output end of the spray gun and the plurality of turbine blades; the spray gun sprays for 10 seconds to 30 seconds to enable the sprayed penetrant to be adsorbed on the surfaces of a plurality of turbine blades. The distance between the spray gun and the turbine blade is 230mm-320 mm. Optionally, the osmotic agent is sprayed around different turbine blades by moving the spray gun circumferentially along the inspection fixture. Alternatively, the inspection jig is mounted on a turntable, and the lance is rotated to eject the penetrant to different turbine blades and different portions of the turbine blades. The spraying time is adjusted according to the size and the number of the turbine blades, if the spraying time is too short, the surface of the turbine blades is not completely covered by the penetrant, and if the spraying time is too long, the penetrant covering the surface of the turbine blades is too thick, so that the difficulty in subsequently removing the redundant penetrant is increased. Optionally, after the penetrant is sprayed, observing whether the surface of the turbine blade is completely covered by the penetrant under a black light lamp, and performing additional spraying or manual brushing on the part which is not covered by the penetrant through a spray gun.
Removing the redundant penetrant on the surface of the turbine blade, comprising the following steps: pre-washing the turbine blade; preliminarily emulsifying the turbine blade which is washed in advance; carrying out intermediate water washing on the preliminarily emulsified turbine blade under a black light lamp to form a uniform penetrant thin layer on the surface of the turbine blade; supplementing and emulsifying the turbine blade which is washed by the middle water; and finally washing the supplemented and emulsified turbine blades under a black light lamp to remove the emulsified penetrant on the surfaces of the turbine blades. Before the turbine blade applied with the penetrant is preliminarily emulsified, a part of the redundant penetrant on the surface of the turbine blade is removed through pre-washing, and meanwhile, a part of the penetrant entering an inner cavity of a blade body of the turbine blade and a cooling channel is carried out by water flow, so that the fluidity of the penetrant on the surface of the turbine blade is improved, and the uniformity of the penetrant on the surface of the turbine blade is improved. The thicknesses of penetrants on different parts of the surface of the turbine blade are different, the emulsification effect of the part with the thicker penetrant layer thickness is easy to occur if the penetrants are directly emulsified once, the penetrants on the surface of the turbine blade cannot be completely emulsified and cannot be cleaned by washing, and therefore the yellow-green fluorescent background exists on the surface of the turbine blade under a black light lamp during inspection, and the contrast of defect display is reduced. The method comprises the steps of emulsifying and removing a part of penetrant on the surface of the turbine blade through preliminary emulsification, removing the penetrant after the preliminary emulsification through intermediate washing, simultaneously forming a uniform penetrant thin layer on the surface of the turbine blade, fully emulsifying the penetrant thin layer on the surface of the turbine blade through supplementary emulsification, then washing and removing the penetrant thin layer, and performing the intermediate washing and the final washing under a black light lamp to observe the removal condition of the penetrant emulsified on the surface of the turbine blade.
Preliminary emulsification and supplementary emulsification, comprising the following steps: selecting an emulsifier matched with the penetrant, and determining the total emulsifying time required for the emulsifier to emulsify the penetrant on the surface of the turbine blade through tests; allocating the time of primary emulsification and the time of supplementary emulsification according to the total emulsification time, wherein the time of primary emulsification is 0.5-0.6 times of the total time, and the time of supplementary emulsification is 0.4-0.5 times of the total time; both after the preliminary and after the supplementary emulsification, it is necessary to immediately immerse the turbine blades in water and quickly remove the turbine blades to stop the reaction of the emulsifier with the penetrant on the surface of the turbine blades. After a part of penetrant on the surface of the turbine blade is removed through preliminary emulsification, an even penetrant thin layer is formed on the surface of the turbine blade through intermediate water washing under a black light lamp, the remaining even penetrant thin layer is emulsified through supplementary emulsification, and then the penetrant thin layer is removed through final water washing, so that the penetrant on the surface of the turbine blade is removed, and the penetrant residue on the surface of the turbine blade during imaging is prevented from interfering defect display.
The pre-washing, the intermediate washing and the final washing are all sprayed by a spray gun, the water pressure is not more than 0.27MPa, and the distance between a nozzle of the spray gun and the surface of the turbine blade is more than or equal to 300 mm. The time for cleaning the same part is not more than 2 minutes. Through spray gun spraying, the water pressure is not more than 0.27MPa, and the distance between the nozzle of the spray gun and the surface of the turbine blade is more than or equal to 300mm, so that the condition that the water flow sprayed by the spray gun excessively presses the surface of the turbine blade to flush away penetrant in defects is avoided. The time for cleaning the same part exceeds two minutes, which easily causes the penetrant in the defect to be cleaned, and reduces the detection sensitivity.
Directly placing the turbine blade with the surface redundant penetrant removed in a hot air circulation oven for drying, wherein the drying temperature is not more than 70 ℃, and the drying time is not more than 10 minutes. Optionally, the turbine blades with excess penetrant removed from the surface are wiped before being placed in a hot air circulation oven for drying. Alternatively, if the turbine blade with the excess penetrant removed from the surface is not dried after being dried in the hot air circulation oven for 10 minutes, the surface of the turbine blade is wiped or dried at room temperature. Through placing turbine blade in hot-air circulation oven and drying, hot-blast relative compressed air in the hot-air circulation oven is gentler, avoids blowing a small amount of penetrant to the turbine blade surface by the air current in turbine blade body inner chamber and the cooling channel, leads to turbine blade surface part to have yellow green fluorescence to adsorb, has reduced the contrast that the defect shows, influences the judgement of testing result. When the drying temperature exceeds 70 ℃, penetrants in the defects are easy to dry and cannot be adsorbed to the surface by the developer, so that the detection sensitivity is reduced.
Placing the dried turbine blade under a black light lamp for inspection, and comprising the following steps: placing the dried turbine blade in a developing tank and applying a developing agent matched with the penetrating agent to the surface of the dried turbine blade; and standing for 20 minutes or less, so that the developer adsorbs penetrant in the opening defect on the surface of the turbine blade to the surface of the turbine blade, and if the surface of the turbine blade does not have yellow-green fluorescence, the turbine blade is a qualified product without surface defects. When the standing time exceeds 20 minutes, a small amount of penetrating agent which is not removed in the turbine blade air film holes and the cooling channel reversely permeates to the surface of the turbine blade under the action of the capillary phenomenon of the developer, and the partial area of the surface of the turbine blade under the black light lamp has yellow-green fluorescence adsorption, so that the contrast of defect display is influenced, and the judgment of a detection result is influenced.
And (5) placing the developed turbine blade under a black light lamp for inspection, and judging whether the surface quality of the turbine blade is qualified. The defect distribution condition of the surface of the turbine blade is observed by observing the yellow-green fluorescent display of the turbine blade surface penetrant under a black light lamp, and whether the surface quality of the turbine blade is qualified or not is judged according to the defect distribution condition.
After judging whether the surface quality of the turbine blade is qualified, the method further comprises the following steps: and soaking qualified turbine blades in warm water at the temperature of 30-45 ℃ for 5-15 minutes to clean and dry the developer and the penetrant on the surfaces of the turbine blades. The developer and the penetrant on the turbine blade are dissolved in warm water at 30-45 ℃, so that the surface of the turbine blade is cleaned.
The detection clamp of this embodiment for place turbine blade among the above-mentioned fluorescence infiltration detection method, detect anchor clamps and include supporting mechanism, laid the network structure that is used for placing turbine blade on the supporting mechanism, the tenon of blade up and turbine blade pass through the flange and hang on network structure, network structure's height is greater than turbine blade's blade body length, network structure include vertical lead wire and with the horizontal lead wire that vertical lead wire interweaved, vertical lead wire is woven for fish tape and copper line and forms, and horizontal lead wire is the fish tape. During electrostatic spraying, the copper wire is connected with the positive pole, the turbine blades arranged on the net-shaped structure are connected in series, and the penetrating agent part in the spray gun is connected with the negative pole, so that an electrostatic field is formed between the output end of the spray gun and the turbine blades, and then electrostatic spraying is carried out. In this embodiment, the longitudinal lead wire uses two strands of copper wire and one strand of fishing line. The area of the electrostatic field formed by the output end of the spray gun connected with the negative pole after the positive pole is connected by two strands of copper wires is wide, so that the penetrant can be more uniformly adsorbed on the surface of the turbine blade. The transverse lead adopts a single-stranded fishing line. Therefore, the thin transverse lead wire cannot damage the infiltrated layer on the blade body of the turbine blade. The blade profile of the turbine blade is placed between the two transverse leads in parallel to the transverse leads so as to reduce the contact between the blade profile of the turbine blade and the longitudinal leads, and thus the copper wires in the longitudinal leads are prevented from damaging the seeping layer on the surface of the turbine blade. Because the copper wire is easy to deform, the fish wire and the copper wire are interwoven into the longitudinal lead, the rigidity of the longitudinal lead is improved, the longitudinal lead is not easy to deform, and the service life of the longitudinal lead is prolonged.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A fluorescence penetration detection method is used for detecting the surface quality of a small turbine blade with an air film hole, and is characterized by comprising the following steps:
placing a plurality of turbine blades on a detection fixture, wherein the detection fixture comprises a supporting mechanism, a net-shaped structure for placing the turbine blades is arranged on the supporting mechanism, tenons of the blades face upwards, the turbine blades are suspended on the net-shaped structure through a flange plate, the height of the net-shaped structure is larger than the length of blade bodies of the turbine blades, the net-shaped structure comprises longitudinal leads and transverse leads interwoven with the longitudinal leads, the longitudinal leads are formed by weaving fishing lines and copper wires, and the transverse leads are fishing lines; the blade body profile of the turbine blade is placed between the two transverse lead wires in parallel to the transverse lead wires so as to reduce the contact between the blade body profile of the turbine blade and the longitudinal lead wires, and therefore, the copper wires in the longitudinal lead wires are prevented from damaging the seeping layer on the surface of the turbine blade;
applying penetrant to the surfaces of the turbine blades by adopting an electrostatic spraying method, wherein during electrostatic spraying, copper wires are connected with a positive electrode, a plurality of turbine blades arranged on a net structure are connected in series, and then the penetrant part in a spray gun is connected with a negative electrode, so that an electrostatic field is formed between the output end of the spray gun and the plurality of turbine blades and then electrostatic spraying is carried out;
removing the redundant penetrating agent on the surface of the turbine blade;
drying the turbine blade with the surface redundant penetrating agent removed;
developing after applying a developer to the surface of the dried turbine blade;
and (5) placing the developed turbine blade under a black light lamp for inspection, and judging whether the surface quality of the turbine blade is qualified.
2. The fluorescence penetrant inspection method of claim 1, wherein the penetrant is applied to the surface of the turbine blade by electrostatic spraying, and the method comprises the following steps:
and standing the penetrant for 10-70 minutes after the penetrant is adsorbed on the surface of the turbine blade, so that the penetrant can fully permeate into the opening defect on the surface of the turbine blade, and simultaneously, the redundant penetrant in the outer surface of the turbine blade, the inner cavity of the blade body of the turbine blade and the cooling channel can be dripped.
3. The fluorescence penetrant detecting method according to claim 2,
the spray gun sprays for 10 seconds to 30 seconds to enable the sprayed penetrant to be adsorbed on the surfaces of a plurality of turbine blades.
4. The fluorescence penetration test method of claim 1, wherein removing excess penetrant from the surface of the turbine blade comprises the following steps:
pre-washing the turbine blade;
preliminarily emulsifying the turbine blade which is washed in advance;
carrying out intermediate water washing on the preliminarily emulsified turbine blade under a black light lamp to form a uniform penetrant thin layer on the surface of the turbine blade;
supplementing and emulsifying the turbine blade which is washed by the middle water;
and finally washing the supplemented and emulsified turbine blades under a black light lamp to remove the emulsified penetrant on the surfaces of the turbine blades.
5. The fluorescence penetration test method of claim 4, wherein the preliminary emulsification and the supplementary emulsification comprise the steps of:
selecting an emulsifier matched with the penetrant, and determining the total emulsifying time required for the emulsifier to emulsify the penetrant on the surface of the turbine blade through tests;
allocating the time of primary emulsification and the time of supplementary emulsification according to the total emulsification time, wherein the time of primary emulsification is 0.5-0.6 times of the total time, and the time of supplementary emulsification is 0.4-0.5 times of the total time;
both after the preliminary and after the supplementary emulsification, it is necessary to immediately immerse the turbine blades in water and quickly remove the turbine blades to stop the reaction of the emulsifier with the penetrant on the surface of the turbine blades.
6. The fluorescence penetrant detecting method according to claim 4,
the pre-washing, the intermediate washing and the final washing are all sprayed by a spray gun, the water pressure is not more than 0.27MPa, and the distance between a nozzle of the spray gun and the surface of the turbine blade is more than or equal to 300 mm.
7. The fluorescence penetrant detecting method according to claim 1,
directly placing the turbine blade with the surface redundant penetrant removed in a hot air circulation oven for drying, wherein the drying temperature is not more than 70 ℃, and the drying time is not more than 10 minutes.
8. The fluorescence penetration test method of claim 1, wherein the step of applying a developer to the dried turbine blade for development comprises the steps of:
placing the dried turbine blade in a developing tank and applying a developing agent matched with the penetrating agent to the surface of the dried turbine blade;
and standing for less than 20 minutes to enable the developer to adsorb the penetrant in the opening defect on the surface of the turbine blade to the surface of the turbine blade for developing.
9. The fluorescence penetration test method according to claim 1, further comprising the following steps after judging whether the surface quality of the turbine blade is acceptable:
and soaking qualified turbine blades in warm water at the temperature of 30-45 ℃ for 5-15 minutes to clean and dry the developer and the penetrant on the surfaces of the turbine blades.
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| CN110231324A (en) * | 2019-07-15 | 2019-09-13 | 天津大学 | Boundary defect detection system and method |
| CN110687133A (en) * | 2019-09-29 | 2020-01-14 | 哈尔滨飞机工业集团有限责任公司 | Method and device for detecting penetration of paddle pin |
| CN112304625B (en) * | 2020-10-21 | 2022-07-15 | 江苏江航智飞机发动机部件研究院有限公司 | Detection device for turbine blade of aircraft engine |
| CN114324380A (en) * | 2021-12-03 | 2022-04-12 | 南京迪威尔高端制造股份有限公司 | Permeation detection system and permeation detection method for inner hole surfacing layer of underwater oil extraction forge piece |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204807453U (en) * | 2015-06-15 | 2015-11-25 | 珠海保税区摩天宇航空发动机维修有限公司 | Aeroengine hub bucket class work piece fluorescent penetration test equipment |
| CN207908396U (en) * | 2017-12-11 | 2018-09-25 | 中国航发南方工业有限公司 | Blade detects fixture with fluorescent penetrant |
-
2018
- 2018-11-01 CN CN201811292378.8A patent/CN109211864B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204807453U (en) * | 2015-06-15 | 2015-11-25 | 珠海保税区摩天宇航空发动机维修有限公司 | Aeroengine hub bucket class work piece fluorescent penetration test equipment |
| CN207908396U (en) * | 2017-12-11 | 2018-09-25 | 中国航发南方工业有限公司 | Blade detects fixture with fluorescent penetrant |
Non-Patent Citations (3)
| Title |
|---|
| 某型燃气涡轮叶片的荧光渗透检查工艺探讨;戴雪梅 苏清风;《第十届全国磁粉渗透检测技术年会论文集》;20120327;第172页第3段-第174页第2段 * |
| 苏清风 等.静电喷涂荧光渗透检测空心结构零件.《无损检测》.2014, * |
| 静电喷涂荧光渗透检测空心结构零件;苏清风 等;《无损检测》;20141231;第62页第2栏第1段-第64页左栏第4段 * |
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