CN104827194A - Method for rear wall protection in laser processing of turbine blade by using water and silicon dioxide - Google Patents
Method for rear wall protection in laser processing of turbine blade by using water and silicon dioxide Download PDFInfo
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- CN104827194A CN104827194A CN201510243545.XA CN201510243545A CN104827194A CN 104827194 A CN104827194 A CN 104827194A CN 201510243545 A CN201510243545 A CN 201510243545A CN 104827194 A CN104827194 A CN 104827194A
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Abstract
The invention discloses a method for rear wall protection in laser processing of a turbine blade by using water and silicon dioxide, comprising the following steps: grinding the silicon dioxide first; then mixing the silicon dioxide with water to form paste; the paste is injected into a blade runner by virtue of a hole in the top of the turbine blade; punching by adopting pulsed laser; after punching, silicon dioxide particles in the runner are flushed out with flowing water by virtue of the hole in the top of the turbine blade; after the silicon dioxide particles are dried with hot air after being totally flushed out, the laser is scattered, reflected and diffracted by the silicon dioxide particles in front of the rear wall after penetrating through the front wall, and laser spots radiated on the rear wall become large, and the energy is reduced, thus, the power density of the laser radiated on the rear wall becomes small, and accordingly the damage of the laser to the rear wall is weakened or eliminated. The method disclosed by the invention is simple in process and low in cost.
Description
Technical field
The present invention relates to turbine blade of gas turbine technical field, particularly a kind of water-silica is as the rear wall means of defence in turbo blade Laser Processing.
Background technology
As Gas Turbine rotor blade, be operated in the environment of High Rotation Speed and high-temperature fuel gas effect, subject huge centrifugal force and the effect such as oxidation, corrosion.Those are easily corroded by the rear wall position of damage from laser or form center of stress and reduce blade service life, therefore need to carry out lasing safety to rear wall.
At present, lasing safety technology is mainly for the anti-laser hardening of human eye and optical pickocff, its preventing principle has the lasing safety technology based on linear optics principle, the lasing safety technology based on nonlinear optics principle, lasing safety technology based on Transformation Principle, lasing safety technology based on linear optics principle on eyeglass, plates a skim optionally to improve the reflectivity to a certain wavelength light, this kind of method is only applicable to eyeglass, and is not suitable for turbo blade; Noble metal nano particles (as nano particles such as Ag, Au, Pt), Graphene, CNT and organic non-linear optical properties (as phthalocyanine, porphyrin, thiophene etc.) is mainly contained based on the material that the lasing safety technology of nonlinear optical limiting principle is used, its common drawback is complicated process of preparation, cost is high, nano particle is also easily reunited, organic poor heat stability etc.
In addition, lasing safety technology ablated after also having absorbing laser energy is residual carbon or the adhesive of silicon after ablation, but turbo blade maze-type structure makes ablation residue be difficult to take out, and affects the use that turbo blade is follow-up.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, the object of the present invention is to provide a kind of water-silica as the rear wall means of defence in turbo blade Laser Processing, technique is simple, cost is low.
For reaching above-mentioned purpose, the technical scheme that the present invention takes is:
With water-silica as the rear wall means of defence in turbo blade Laser Processing, comprise the following steps:
1) grind silica, and sieve with normal test sieve, the particle size range of final silica dioxide granule used is: 1.3 μm ~ 830 μm;
2) silica and water are mixed and made into pastel, wherein, the mass fraction scope of silica is: 65.6% ~ 91%, then pastel is poured into blade passage by the hole of turbine blade tip;
3) pulse type laser punching is adopted;
4), after having beaten hole, with the hole of flowing water by turbine blade tip, the silica dioxide granule in runner is gone out, after silica dioxide granule is rushed out completely, use hot blast drying.
The technological parameter of described pulse type laser punching is: frequency 70Hz, pulsewidth 0.2ms, peak power 16KW.
Beneficial effect of the present invention:
Water-silica mixture is as protective materials, and preparation is simple, and cost is low.Laser is after penetrating antetheca, be subject to the scattering of silica dioxide granule before rear wall, reflection and diffraction, make irradiation become large at the laser facula of rear wall, energy reduces, such irradiation diminishes at the laser power density of rear wall, thus weakens or eliminate the damage of laser to rear wall.Because silica is very little to laser absorption, so silica is after being subject to laser irradiation, temperature rise is very little, and circumgranular water can absorb heat simultaneously.After having beaten hole, protective materials silica can not bond because of high-temperature fusion, still remains graininess, makes its removal very easy.
Accompanying drawing explanation
Fig. 1 is that the embodiment of the present invention 1 protects schematic diagram.
Fig. 2 is that on the embodiment of the present invention 1 rear wall 7, easy ablation point 6 does not have the picture damaged.
Fig. 3 is the control experiment of the embodiment of the present invention 1, and when not having water-silica mixture 5, on rear wall 7, easy ablation point 6 has the picture of damage.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail.
Embodiment 1
With water-silica as the rear wall means of defence in turbo blade Laser Processing, comprise the following steps:
1) grind silica, and sieve with normal test sieve, the particle size range of final silica dioxide granule used is: 1.3 μm ~ 38 μm;
2) silica and water are mixed and made into pastel, wherein, the mass fraction of silica is 90.9%, then pastel is poured into blade passage by the hole of turbine blade tip;
3) adopt pulse type laser punching, the technological parameter of pulse type laser punching is: frequency 70Hz, pulsewidth 0.2ms, peak power 16KW;
4), after having beaten hole, with the hole of flowing water by turbine blade tip, the silica dioxide granule in runner is gone out, after silica dioxide granule is rushed out completely, use hot blast drying.
The beneficial effect of the present embodiment:
Use microscopic examination air film hole, do not find the phenomenon that silica dioxide granule blocks.With reference to Fig. 1, the laser beam 2 that laser instrument 1 sends, through the film cooling holes 3 of turbo blade antetheca 4, arrives rear wall 7 after being mixed and made into pastel 5 by silica and water, with reference to Fig. 2, and easy ablation point 6 not damage on rear wall 7; As a control group, during the pastel 5 not having water-silica to be mixed, the easy ablation point 6 on rear wall 7 has damage, as shown in Figure 3.
Embodiment 2
With water-silica as the rear wall means of defence in turbo blade Laser Processing, comprise the following steps:
1) grind silica, and sieve with normal test sieve, the particle size range of final silica dioxide granule used is: 38 μm ~ 74 μm;
2) silica and water are mixed and made into pastel, wherein, the mass fraction of silica is 84.8%, then pastel is poured into blade passage by the hole of turbine blade tip;
3) adopt pulse type laser punching, the technological parameter of pulse type laser punching is: frequency 70Hz, pulsewidth 0.2ms, peak power 16KW;
4), after having beaten hole, with the hole of flowing water by turbine blade tip, the silica dioxide granule in runner is gone out, after silica dioxide granule is rushed out completely, use hot blast drying.
The beneficial effect of the present embodiment:
Use microscopic examination air film hole, do not find the phenomenon that silica dioxide granule blocks, on rear wall, easy ablation point is not damaged.
Embodiment 3
With water-silica as the rear wall means of defence in turbo blade Laser Processing, comprise the following steps:
1) grind silica, and sieve with normal test sieve, the particle size range of final silica dioxide granule used is: 74 μm ~ 104 μm;
2) silica and water are mixed and made into pastel, wherein, the mass fraction of silica is 79.6%, then pastel is poured into blade passage by the hole of turbine blade tip;
3) adopt pulse type laser punching, the technological parameter of pulse type laser punching is: frequency 70Hz, pulsewidth 0.2ms, peak power 16KW;
4), after having beaten hole, with the hole of flowing water by turbine blade tip, the silica dioxide granule in runner is gone out, after silica dioxide granule is rushed out completely, use hot blast drying.
The beneficial effect of the present embodiment:
Use microscopic examination air film hole, do not find the phenomenon that silica dioxide granule blocks, on rear wall, easy ablation point is not damaged.
Embodiment 4
With water-silica as the rear wall means of defence in turbo blade Laser Processing, comprise the following steps:
1) grind silica, and sieve with normal test sieve, the particle size range of final silica dioxide granule used is: 104 μm ~ 250 μm;
2) silica and water are mixed and made into pastel, wherein, the mass fraction of silica is 74.3%, then pastel is poured into blade passage by the hole of turbine blade tip;
3) adopt pulse type laser punching, the technological parameter of pulse type laser punching is: frequency 70Hz, pulsewidth 0.2ms, peak power 16KW;
4), after having beaten hole, with the hole of flowing water by turbine blade tip, the silica dioxide granule in runner is gone out, after silica dioxide granule is rushed out completely, use hot blast drying.
The beneficial effect of the present embodiment:
Use microscopic examination air film hole, do not find the phenomenon that silica dioxide granule blocks, on rear wall, easy ablation point is not damaged.
Embodiment 5
With water-silica as the rear wall means of defence in turbo blade Laser Processing, comprise the following steps:
1) grind silica, and sieve with normal test sieve, the particle size range of final silica dioxide granule used is: 710 μm ~ 840 μm;
2) silica and water are mixed and made into pastel, wherein, the mass fraction of silica is 65.6%, then pastel is poured into blade passage by the hole of turbine blade tip;
3) adopt pulse type laser punching, the technological parameter of pulse type laser punching is: frequency 70Hz, pulsewidth 0.2ms, peak power 16KW;
4), after having beaten hole, with the hole of flowing water by turbine blade tip, the silica dioxide granule in runner is gone out, after silica dioxide granule is rushed out completely, use hot blast drying.
The beneficial effect of the present embodiment:
Use microscopic examination air film hole, do not find the phenomenon that silica dioxide granule blocks, on rear wall, easy ablation point is not damaged.
Claims (7)
1. use water-silica as the rear wall means of defence in turbo blade Laser Processing, it is characterized in that, comprise the following steps:
1) grind silica, and sieve with normal test sieve, the particle size range of final silica dioxide granule used is: 1.3 μm ~ 830 μm;
2) silica and water are mixed and made into pastel, wherein, the mass fraction scope of silica is: 65.6% ~ 91%, then pastel is poured into blade passage by the hole of turbine blade tip;
3) pulse type laser punching is adopted;
4), after having beaten hole, with the hole of flowing water by turbine blade tip, the silica dioxide granule in runner is gone out, after silica dioxide granule is rushed out completely, use hot blast drying.
2. water-silica according to claim 1 is as the rear wall means of defence in turbo blade Laser Processing, it is characterized in that: the technological parameter of described pulse type laser punching is: frequency 70Hz, pulsewidth 0.2ms, peak power 16KW.
3. water-silica according to claim 1 is as the rear wall means of defence in turbo blade Laser Processing, it is characterized in that, comprises the following steps:
1) grind silica, and sieve with normal test sieve, the particle size range of final silica dioxide granule used is: 1.3 μm ~ 38 μm;
2) silica and water are mixed and made into pastel, wherein, the mass fraction of silica is 90.9%, then pastel is poured into blade passage by the hole of turbine blade tip;
3) adopt pulse type laser punching, the technological parameter of pulse type laser punching is: frequency 70Hz, pulsewidth 0.2ms, peak power 16KW;
4), after having beaten hole, with the hole of flowing water by turbine blade tip, the silica dioxide granule in runner is gone out, after silica dioxide granule is rushed out completely, use hot blast drying.
4. water-silica according to claim 1 is as the rear wall means of defence in turbo blade Laser Processing, it is characterized in that, comprises the following steps:
1) grind silica, and sieve with normal test sieve, the particle size range of final silica dioxide granule used is: 38 μm ~ 74 μm;
2) silica and water are mixed and made into pastel, wherein, the mass fraction of silica is 84.8%, then pastel is poured into blade passage by the hole of turbine blade tip;
3) adopt pulse type laser punching, the technological parameter of pulse type laser punching is: frequency 70Hz, pulsewidth 0.2ms, peak power 16KW;
4), after having beaten hole, with the hole of flowing water by turbine blade tip, the silica dioxide granule in runner is gone out, after silica dioxide granule is rushed out completely, use hot blast drying.
5. water-silica according to claim 1 is as the rear wall means of defence in turbo blade Laser Processing, it is characterized in that, comprises the following steps:
1) grind silica, and sieve with normal test sieve, the particle size range of final silica dioxide granule used is: 74 μm ~ 104 μm;
2) silica and water are mixed and made into pastel, wherein, the mass fraction of silica is 79.6%, then pastel is poured into blade passage by the hole of turbine blade tip;
3) adopt pulse type laser punching, the technological parameter of pulse type laser punching is: frequency 70Hz, pulsewidth 0.2ms, peak power 16KW;
4), after having beaten hole, with the hole of flowing water by turbine blade tip, the silica dioxide granule in runner is gone out, after silica dioxide granule is rushed out completely, use hot blast drying.
6. water-silica according to claim 1 is as the rear wall means of defence in turbo blade Laser Processing, it is characterized in that, comprises the following steps:
1) grind silica, and sieve with normal test sieve, the particle size range of final silica dioxide granule used is: 104 μm ~ 250 μm;
2) silica and water are mixed and made into pastel, wherein, the mass fraction of silica is 74.3%, then pastel is poured into blade passage by the hole of turbine blade tip;
3) adopt pulse type laser punching, the technological parameter of pulse type laser punching is: frequency 70Hz, pulsewidth 0.2ms, peak power 16KW;
4), after having beaten hole, with the hole of flowing water by turbine blade tip, the silica dioxide granule in runner is gone out, after silica dioxide granule is rushed out completely, use hot blast drying.
7. water-silica according to claim 1 is as the rear wall means of defence in turbo blade Laser Processing, it is characterized in that, comprises the following steps:
1) grind silica, and sieve with normal test sieve, the particle size range of final silica dioxide granule used is: 710 μm ~ 840 μm;
2) silica and water are mixed and made into pastel, wherein, the mass fraction of silica is 65.6%, then pastel is poured into blade passage by the hole of turbine blade tip;
3) adopt pulse type laser punching, the technological parameter of pulse type laser punching is: frequency 70Hz, pulsewidth 0.2ms, peak power 16KW;
4), after having beaten hole, with the hole of flowing water by turbine blade tip, the silica dioxide granule in runner is gone out, after silica dioxide granule is rushed out completely, use hot blast drying.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510243545.XA CN104827194A (en) | 2015-05-13 | 2015-05-13 | Method for rear wall protection in laser processing of turbine blade by using water and silicon dioxide |
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| CN201510243545.XA CN104827194A (en) | 2015-05-13 | 2015-05-13 | Method for rear wall protection in laser processing of turbine blade by using water and silicon dioxide |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107999957A (en) * | 2016-10-28 | 2018-05-08 | 中国航空工业集团公司北京航空制造工程研究所 | Avoid the protective materials of laser punching damage cavity part opposite walls and insert method |
| CN108044244A (en) * | 2017-12-18 | 2018-05-18 | 中国科学院西安光学精密机械研究所 | Method for processing hole in complex cavity part by using laser and filling and cleaning device |
| CN114273802A (en) * | 2020-09-27 | 2022-04-05 | 中国科学院宁波材料技术与工程研究所 | Laser drilling back injury protection method and device |
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| CN102085606A (en) * | 2009-12-04 | 2011-06-08 | 西门子公司 | Filler material when drilling passageway holes in hollow components, method and device for same |
| CN102825426A (en) * | 2011-04-11 | 2012-12-19 | 通用电气公司 | Methods of fabricating coated component using multiple types of fillers |
| CN103157907A (en) * | 2011-12-15 | 2013-06-19 | 西门子公司 | Method for laser processing a laminated piece with ceramic coating |
| CN103635281A (en) * | 2011-07-05 | 2014-03-12 | 罗伯特·博世有限公司 | Method for generating at least one through-hole and device for carrying out such a method |
| US20140093669A1 (en) * | 2012-10-01 | 2014-04-03 | Christopher Degel | Process for protecting a component, process for laser drilling and component |
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2015
- 2015-05-13 CN CN201510243545.XA patent/CN104827194A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102085606A (en) * | 2009-12-04 | 2011-06-08 | 西门子公司 | Filler material when drilling passageway holes in hollow components, method and device for same |
| CN102825426A (en) * | 2011-04-11 | 2012-12-19 | 通用电气公司 | Methods of fabricating coated component using multiple types of fillers |
| CN103635281A (en) * | 2011-07-05 | 2014-03-12 | 罗伯特·博世有限公司 | Method for generating at least one through-hole and device for carrying out such a method |
| CN103157907A (en) * | 2011-12-15 | 2013-06-19 | 西门子公司 | Method for laser processing a laminated piece with ceramic coating |
| US20140093669A1 (en) * | 2012-10-01 | 2014-04-03 | Christopher Degel | Process for protecting a component, process for laser drilling and component |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107999957A (en) * | 2016-10-28 | 2018-05-08 | 中国航空工业集团公司北京航空制造工程研究所 | Avoid the protective materials of laser punching damage cavity part opposite walls and insert method |
| CN108044244A (en) * | 2017-12-18 | 2018-05-18 | 中国科学院西安光学精密机械研究所 | Method for processing hole in complex cavity part by using laser and filling and cleaning device |
| CN114273802A (en) * | 2020-09-27 | 2022-04-05 | 中国科学院宁波材料技术与工程研究所 | Laser drilling back injury protection method and device |
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Application publication date: 20150812 |