CN112648135B - Wind power blade and refitting process thereof - Google Patents
Wind power blade and refitting process thereof Download PDFInfo
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- CN112648135B CN112648135B CN202011433194.6A CN202011433194A CN112648135B CN 112648135 B CN112648135 B CN 112648135B CN 202011433194 A CN202011433194 A CN 202011433194A CN 112648135 B CN112648135 B CN 112648135B
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- 238000000034 method Methods 0.000 title claims abstract description 30
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- 238000004080 punching Methods 0.000 claims description 11
- 238000010422 painting Methods 0.000 claims description 9
- 230000005611 electricity Effects 0.000 claims description 8
- 238000005498 polishing Methods 0.000 claims description 8
- 238000004140 cleaning Methods 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 5
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- 239000000853 adhesive Substances 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
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- 230000007480 spreading Effects 0.000 claims description 2
- 238000003892 spreading Methods 0.000 claims description 2
- 238000009420 retrofitting Methods 0.000 claims 5
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- 230000004048 modification Effects 0.000 abstract description 12
- 238000012986 modification Methods 0.000 abstract description 12
- 238000010248 power generation Methods 0.000 abstract description 3
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor
- F03D1/06—Rotors
- F03D1/065—Rotors characterised by their construction elements
- F03D1/0675—Rotors characterised by their construction elements of the blades
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor
- F03D1/06—Rotors
- F03D1/0608—Rotors characterised by their aerodynamic shape
- F03D1/0633—Rotors characterised by their aerodynamic shape of the blades
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
Abstract
The invention relates to the technical field of wind power generation, in particular to a wind power blade and a modification process thereof. The wind power blade is provided with a drain hole close to the blade tip, and the drain hole is arranged on the suction surface of the wind power blade and communicated with the inner cavity of the wind power blade; the tip of the drainage hole from the tip part is a ═ k1*L*10‑3K is the trailing edge of the blade tip2*L*10‑3(ii) a And L is the length of the wind power blade. The wind power blade can obviously reduce or eliminate whistle, timely eliminates potential safety hazards, and improves the motion reliability of the whole wind turbine generator.
Description
Technical Field
The invention relates to the technical field of wind power generation, in particular to a wind power blade and a modification process thereof.
Background
The whistle sound exists when the apex of wind generating set leads to the operation because of the wash port, and this can influence the operating personnel to the judgement of unit health status, and unnecessary shut down inspection can influence the power generation benefit of wind-powered electricity generation field to a certain extent. Meanwhile, after the water drainage device runs for a long time, the thought of operators is easy to be paralyzed, whistle caused by other defects such as cracking of the blade tip is easy to be considered as a water drainage hole, and huge potential safety hazards can be buried.
Disclosure of Invention
The invention provides a wind power blade and a modification process thereof, which aim to solve the technical problem of whistle at the blade tip of a wind generating set.
The invention provides a wind power blade, wherein a drain hole is formed in the position, close to the blade tip, of the wind power blade, and the drain hole is formed in the suction surface of the wind power blade and is communicated with the inner cavity of the wind power blade;
the tip of the drainage hole from the tip part is a ═ k1*L*10-3K is the trailing edge of the blade tip2*L*10-3；
The tip of the drainage hole from the tip part is a ═ k1*L*10-3And the deviation is plus or minus 0.010 meter, and the unit of a is meter;
the rear edge of the drainage hole away from the blade tip is k2*L*10-3And the deviation is plus or minus 0.005 m, and the unit of b is m;
wherein k is1＝m0-(L-L0)*55*10-3，k2＝n0-(L-L0)*9*10-3Are the corresponding dimensionless scaling factors;
m0＝13.3，n02.22, which is a dimensionless basis coefficient;
L045 meters, base length; and L is the length of the wind power blade, and the unit is meter.
Furthermore, the axis of the drain hole is obliquely arranged relative to the suction surface, the included angle beta between the axis of the drain hole and the suction surface is 25-35 degrees, and the included angle gamma between the axis of the drain hole and the axis of the wind power blade is 35-45 degrees; the drain hole is gradually close to the rear edge of the blade tip part from outside to inside and gradually far away from the axis of the wind power blade.
Further, the inner hole wall of the drainage hole is coated with finish paint.
The invention also provides a modification process of the wind power blade, which is used for modifying the original drain hole of the wind power blade, and the modification steps comprise:
polishing a preset area on the periphery of the original drain hole: spreading a preset area around the original drain hole by taking the original drain hole as a center, polishing the coating on the surface of the shell in the preset area completely, and cleaning;
determining the position of a new drainage hole and punching: determining the position of the new drainage hole at the tip part of the suction surface of the wind power blade, wherein the tip part of the new drainage hole away from the tip part is a (k)1*L*10-3And the deviation is plus or minus 0.010 meter, and the unit of a is meter; the position of the new drain hole is b-k away from the rear edge of the blade tip part2*L*10-3And the deviation is plus or minus 0.005 m, and the unit of b is m; wherein k is1＝m0-(L-L0)*55*10-3，k2＝n0-(L-L0)*9*10-3Are the corresponding dimensionless scaling factors; m is0＝13.3，n02.22, which is a dimensionless basis coefficient; l is045 meters, base length; l is the actual length of the wind power blade, and the unit is meter; drilling holes at the positions of the new drainage holes until the holes are communicated with the inner cavity of the wind power blade;
plugging the original drain hole: firstly, cleaning the paint on the inner side wall of the original drain hole, ensuring that the inner side wall of the original drain hole is a pitted surface, plugging the original drain hole by using structural adhesive, pasting a layer of triaxial cloth by taking the original drain hole as a center, covering demoulding cloth on the triaxial cloth, and curing;
painting a predetermined area: painting the predetermined area to make the predetermined area consistent with other areas of the wind turbine blade.
Further, the new drain hole position is located in the predetermined area.
Further, in the step of determining the position of the new drainage hole and punching, in the punching process, the axis of the new drainage hole is ensured to be obliquely arranged relative to the suction surface, an included angle β between the axis of the new drainage hole and the suction surface is 30 ° ± 5 °, and an included angle γ between the axis of the new drainage hole and the axis of the wind power blade is 40 ° ± 5 °; the new drain hole is gradually close to the rear edge of the blade tip part from outside to inside and gradually far away from the axis of the wind power blade.
Further, in the step of determining the position of the new drain hole and punching, after the new drain hole is punched, finishing paint is coated on the inner hole wall of the new drain hole.
Further, in the step of plugging the original drain hole, the triaxial cloth is selected to be 1200g/m of 100mm multiplied by 100mm2And (3) triaxial cloth.
Furthermore, the outer surface of the triaxial fabric is a pitted surface, and the triaxial fabric is flat, wrinkle-free and bubble-free.
Further, in the step of painting the predetermined area, the step of:
puttying, namely puttying in the preset area to be smooth, curing and polishing;
brushing primer, namely brushing primer on the preset area after the putty is scraped on the preset area, and curing;
brushing finish paint, brushing finish paint on the preset area after brushing the primer on the preset area, and curing;
and brushing aerial mark paint, and brushing transverse empty mark paint on the preset area after finishing brushing the finish paint on the preset area.
The wind power blade and the modification process thereof provided by the embodiment of the invention have the following beneficial effects:
in the wind power blade provided by the embodiment of the invention, the drain hole is arranged at the position of the preset drain hole, and the tip part of the preset drain hole, which is far away from the blade tip part, meets the empirical formula: a ═ k1*L*10-3The rear edge of the blade tip part meets the empirical formula: k ═ b2*L*10-3(ii) a Wherein k is1＝m0-(L-L0)*55*10-3，k2＝n0-(L-L0)*9*10-3；m0＝13.3，n0＝2.22，L045 m; and L is the length of the wind power blade. The whistle can be obviously reduced or eliminated in the region, in the working process of the wind turbine blade, when the whistle is generated, the condition that the drain hole generates the whistle is eliminated, a worker can definitely generate other faults for the wind turbine blade, and the whistle is maintained in time, so that potential safety hazards are timely eliminated, and the motion reliability of the whole wind turbine generator is improved.
In the modification process of the wind power blade provided by the embodiment of the invention, the new drain hole is arranged at the position of the preset drain hole, and the tip part of the preset drain hole, which is far away from the blade tip part, meets the empirical formula: a ═ k1*L*10-3The rear edge of the blade tip part meets the empirical formula: k ═ b2*L*10-3(ii) a Wherein k is1＝m0-(L-L0)*55*10-3，k2＝n0-(L-L0)*9*10-3；m0＝13.3，n0＝2.22，L045 m; and L is the length of the wind power blade. The whistle can be obviously reduced or eliminated in the region, in the working process of the wind turbine blade, when the whistle is generated, the condition that the drain hole generates the whistle is eliminated, a worker can definitely generate other faults for the wind turbine blade, and the whistle is maintained in time, so that potential safety hazards are timely eliminated, and the motion reliability of the whole wind turbine generator is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic view of a tip portion of a wind turbine blade according to an embodiment of the present invention.
Description of reference numerals:
100-wind power blades; 110-drainage holes.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The embodiment provides a wind power blade, as shown in fig. 1, a drain hole 110 is formed in a position, close to a blade tip, of a wind power blade 100, and the drain hole 110 is arranged on a suction surface of the wind power blade 100 and is communicated with an inner cavity of the wind power blade 100;
the tip of the drainage hole from the tip part is a ═ k1*L*10-3And the deviation is plus or minus 0.010 meter, and the unit of a is meter; the rear edge of the water drainage hole from the tip part is k2*L*10-3And the deviation is plus or minus 0.005 m, and the unit of b is m;
wherein k is1＝m0-(L-L0)*55*10-3，k2＝n0-(L-L0)*9*10-3Are the corresponding dimensionless scaling factors; m is0＝13.3，n02.22, which is a dimensionless basis coefficient; l and L are0In the two empirical formulas, the corresponding value of unit meter is calculated as a dimensionless number.
L045 meters, base length; and L is the length of the wind power blade and is measured in meters.
In the wind power blade provided by the embodiment of the invention, the drain hole is arranged at the position of the preset drain hole, and the tip part of the preset drain hole, which is far away from the blade tip part, meets the empirical formula: a ═ k1*L*10-3And the deviation is plus or minus 0.010 meter; the position of the preset drain hole and the rear edge of the blade tip part meet the empirical formula: k ═ b2*L*10-3And the deviation is +/-0.005 m; wherein k is1＝m0-(L-L0)*55*10-3，k2＝n0-(L-L0)*9*10-3；m0＝13.3，n0＝2.22，L045 m; and L is the length of the wind power blade. The whistle can be obviously reduced or eliminated in the region, in the working process of the wind turbine blade, when the whistle is generated, the condition that the drain hole generates the whistle is eliminated, a worker can definitely generate other faults for the wind turbine blade, and the whistle is maintained in time, so that potential safety hazards are timely eliminated, and the motion reliability of the whole wind turbine generator is improved.
In this embodiment, the axis of the drain hole is inclined with respect to the suction surface, an included angle β between the axis of the drain hole and the suction surface is 30 ° ± 5 °, and an included angle γ between the axis of the drain hole and the axis of the wind power blade is 40 ° ± 5 °; the drain hole is gradually close to the rear edge of the blade tip part from outside to inside and is gradually far away from the axis of the wind power blade. By the arrangement, the occurrence of whistle sound of the blade tip caused by the drain hole can be further eliminated or avoided.
In the embodiment, the inner hole wall of the drain hole is coated with finish paint, so that the corrosion of the outer periphery to the inner hole wall of the drain hole is prevented, and the drain hole is effectively protected.
The embodiment of the invention also provides a modification process of the wind power blade, which is used for modifying the original drain hole of the wind power blade, and the modification step comprises the following steps:
s202, grinding a preset area on the periphery of the original drain hole: taking the original drain hole as a center, diffusing a preset area around the original drain hole, polishing the coating on the surface of the shell in the preset area completely, and cleaning;
s204, determining the position of a new drainage hole and punching: determining a new drain hole position at the tip part of the suction surface of the wind power blade, wherein the tip part of the new drain hole position away from the tip part is a (k)1*L*10-3And the deviation is plus or minus 0.010 meter, and the unit of a is meter; the position of the new water drainage hole is b-k away from the rear edge of the blade tip part2*L*10-3And the deviation is + -0.005 m, and the unit of b is m. Wherein k is1＝m0-(L-L0)*55*10-3，k2＝n0-(L-L0)*9*10-3For the corresponding dimensionless scaling factor, it should be noted that L and L0In the two empirical formulas, the corresponding value of unit meter is calculated as a dimensionless number. m is0＝13.3，n02.22, which is a dimensionless basis coefficient; l is045 meters, base length; l is the length of the wind power blade and the unit is meter; and drilling holes at the positions of the new drainage holes until the holes are communicated with the inner cavity of the wind power blade.
S206, plugging the original drain hole: firstly, cleaning paint on the inner side wall of an original drain hole, ensuring that the inner side wall of the original drain hole is a rough surface, plugging the original drain hole by using structural adhesive, pasting a layer of triaxial cloth by taking the original drain hole as a center, covering demoulding cloth on the triaxial cloth, and curing;
s208 painting the predetermined area: painting the predetermined area to make the predetermined area consistent with other areas of the wind turbine blade.
In the modification process of the wind power blade provided by the embodiment of the invention, the new drain hole is arranged at the position of the preset drain hole, and the tip part of the preset drain hole, which is far away from the blade tip part, meets the empirical formula: a ═ k1*L*10-3And the deviation is plus or minus 0.010 meter; the position of the preset drain hole and the rear edge of the blade tip part meet the empirical formula: k ═ b2*L*10-3And the deviation is +/-0.005 m; wherein k is1＝m0-(L-L0)*55*10-3，k2＝n0-(L-L0)*9*10-3；m0＝13.3，n0＝2.22，L045 m; and L is the length of the wind power blade. The whistle can be obviously reduced or eliminated in the region, in the working process of the wind turbine blade, when the whistle is generated, the condition that the drain hole generates the whistle is eliminated, a worker can definitely generate other faults for the wind turbine blade, and the whistle is maintained in time, so that potential safety hazards are timely eliminated, and the motion reliability of the whole wind turbine generator is improved.
In this embodiment, the new drain hole is located in a predetermined area.
In this embodiment, in the step of determining the position of the new drainage hole and punching the hole in S204, in the punching process, it is ensured that the axis of the new drainage hole is obliquely arranged with respect to the suction surface, an included angle β between the axis of the new drainage hole and the suction surface is 25 ° to 35 °, and an included angle γ between the axis of the new drainage hole and the axis of the wind turbine blade is 35 ° to 45 °; the new drain hole is gradually close to the rear edge of the blade tip part from outside to inside and gradually far away from the axis of the wind power blade.
In this embodiment, in the step of determining the position of the new drainage hole and punching in S204, after the new drainage hole is punched, the inner hole wall of the new drainage hole is coated with the finish paint.
In this embodiment, in the step of plugging the original drain hole in S206, the triaxial cloth is selected to be 1200g/m of 100mm × 100mm2And (3) triaxial cloth.
In this embodiment, in the step of plugging the original drainage hole in S206, the outer surface of the triaxial fabric is a rough surface, and is flat, wrinkle-free, and bubble-free.
In the present embodiment, the step of painting the predetermined area in S208 includes the steps of:
s302, putty coating, namely coating a smooth putty in a preset area, curing and polishing;
s304, priming, namely after putty is applied to the preset area, priming the preset area and curing;
s306, brushing finish paint on the preset area after brushing the primer on the preset area, and curing;
s308, brushing aerial mark paint, and brushing transverse empty mark paint on the preset area after finishing brushing the finish paint on the preset area.
Example one
Taking the length L of the wind power blade as an example, and taking the length L of the wind power blade as 45 m, according to an empirical formula, and taking the length a as k1*L*10-3，b＝k2*L*10-3；k1＝m0-(L-L0)*55*10-3，k2＝n0-(L-L0)*9*10-3；m0＝13.3，n0＝2.22，L0If the distance between the position of the drainage hole and the tip a of the tip part is 45 meters, the value range of the drainage hole from the tip part a is as follows: a is 0.599 m +/-0.005 m, and the value range from the rear edge b is as follows: b is 0.100 meter +/-0.005 meter。
An included angle beta between the axis of the drain hole and the suction surface is 30 degrees +/-5 degrees, and an included angle gamma between the axis of the drain hole and the axis of the wind power blade is 40 degrees +/-5 degrees;
in this embodiment, the position and the angle are respectively: a is 0.600 m, b is 0.100 m, β is 29 °, γ is 38 °, as shown in the following table.
Example two
Taking the length L of the wind power blade as 55 m as an example, according to an empirical formula a k1*L*10-3，b＝k2*L*10-3；k1＝m0-(L-L0)*55*10-3，k2＝n0-(L-L0)*9*10-3；m0＝13.3，n0＝2.22，L0If the distance between the position of the drainage hole and the tip a of the tip part is 45 meters, the value range of the drainage hole from the tip part a is as follows: a is 0.701 m +/-0.005 m, and the value range from the rear edge b is as follows: b is 0.117 m + -0.005 m.
An included angle beta between the axis of the drain hole and the suction surface is 30 degrees +/-5 degrees, and an included angle gamma between the axis of the drain hole and the axis of the wind power blade is 40 degrees +/-5 degrees;
in this embodiment, the position and the angle are respectively: a is 0.700 m, b is 0.120 m, β is 30 °, γ is 40 °, and the specific values are shown in the following table.
EXAMPLE III
Taking the length L of the wind power blade as an example, 78 m, and k according to an empirical formula1*L*10-3，b＝k2*L*10-3；k1＝m0-(L-L0)*55*10-3，k2＝n0-(L-L0)*9*10-3；m0＝13.3，n0＝2.22，L0If the distance between the position of the drainage hole and the tip a of the tip part is 45 meters, the value range of the drainage hole from the tip part a is as follows: a is 0.895 m +/-0.010 m, and the value range from the rear edge b is as follows: b is 0.150 m +/-0.005 m.
An included angle beta between the axis of the drain hole and the suction surface is 30 degrees +/-5 degrees, and an included angle gamma between the axis of the drain hole and the axis of the wind power blade is 40 degrees +/-5 degrees;
in this embodiment, the position and the angle are respectively: a is 0.900 m, b is 0.150 m, β is 32 °, γ is 41 °, and the specific values are shown in the following table.
In the following table, taking three sizes of wind turbine blades as an example, the arrangement positions and angles of the drain holes are respectively:
in the existing wind power blade, when the position of the drain hole is not at the setting position determined by the empirical formula, the wind power blade is blown by a simulation environment test, the distance between the wind power blade and the drain hole is 10 meters, the whistle decibels are all over 80, and when the position of the modified drain hole is within the position range determined by the empirical formula, the whistle decibels are all lower than 15. Wind-powered electricity generation blade like each data carries out approximate environmental simulation before the equipment in above-mentioned table, blow the wind-powered electricity generation blade promptly, and measure apart from wind-powered electricity generation blade 10 meters distance, whistle average decibel value is 12.8 respectively, 11.5, 12.4, apex whistle has obviously been reduced, in the installation wind-powered electricity generation blade actual work process, because external environment's complexity, the whistle that is less than 15 decibels can be submerged by ambient noise, can ignore the influence of apex whistle this moment, when great decibel whistle appears, then can tentatively judge that the wind-powered electricity generation blade probably has broken down, in time remind the maintenance personal to carry out maintenance work.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
In the above embodiments, the descriptions of the orientations such as "up", "down", and the like are based on the drawings.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A wind power blade is characterized in that a drain hole is formed in the position, close to the blade tip, of the wind power blade, and the drain hole is formed in the suction surface of the wind power blade and communicated with the inner cavity of the wind power blade;
the tip of the drainage hole from the tip part is a ═ k1*L*10-3And the deviation is plus or minus 0.010 meter, and the unit of a is meter;
the rear edge of the drainage hole away from the blade tip is k2*L*10-3And the deviation is plus or minus 0.005 m, and the unit of b is m;
wherein k is1＝m0-(L-L0)*55*10-3，k2＝n0-(L-L0)*9*10-3Are the corresponding dimensionless scaling factors;
m0＝13.3，n02.22, which is a dimensionless basis coefficient;
L045 meters, base length; and L is the actual length of the wind power blade, and the unit is meter.
2. The wind power blade according to claim 1, wherein an axis of the drain hole is obliquely arranged relative to the suction surface, an included angle β between the axis of the drain hole and the suction surface is 25 ° to 35 °, and an included angle γ between the axis of the drain hole and the axis of the wind power blade is 35 ° to 45 °; the drain hole is gradually close to the rear edge of the blade tip part from outside to inside and gradually far away from the axis of the wind power blade.
3. The wind blade as set forth in claim 2, wherein the inner bore wall of the drainage hole is coated with a finish.
4. The utility model provides a repacking technology of wind-powered electricity generation blade which characterized in that for repacking the original wash port of wind-powered electricity generation blade, the repacking step includes:
polishing a preset area on the periphery of the original drain hole: spreading a preset area around the original drain hole by taking the original drain hole as a center, polishing the coating on the surface of the shell in the preset area completely, and cleaning;
determining the position of a new drainage hole and punching: determining the position of the new drainage hole at the tip part of the suction surface of the wind power blade, wherein the tip part of the new drainage hole away from the tip part is a (k)1*L*10-3And the deviation is plus or minus 0.010 meter, and the unit of a is meter; the position of the new drain hole is b-k away from the rear edge of the blade tip part2*L*10-3And the deviation is plus or minus 0.005 m, and the unit of b is m; wherein k is1＝m0-(L-L0)*55*10-3，k2＝n0-(L-L0)*9*10-3Are the corresponding dimensionless scaling factors; m is0＝13.3，n02.22, which is a dimensionless basis coefficient; l is045 meters, base length; l is the actual length of the wind power blade in unitIs rice; drilling holes at the positions of the new drainage holes until the holes are communicated with the inner cavity of the wind power blade;
plugging the original drain hole: firstly, cleaning the paint on the inner side wall of the original drain hole, ensuring that the inner side wall of the original drain hole is a pitted surface, plugging the original drain hole by using structural adhesive, pasting a layer of triaxial cloth by taking the original drain hole as a center, covering demoulding cloth on the triaxial cloth, and curing;
painting a predetermined area: painting the predetermined area to make the predetermined area consistent with other areas of the wind turbine blade.
5. The retrofitting process according to claim 4, wherein said new drain hole location is located in said predetermined area.
6. The refitting process according to claim 4, wherein in the step of determining the position of the new drain hole and punching, during the punching process, the axis of the new drain hole is ensured to be obliquely arranged relative to the suction surface, the included angle β between the axis of the new drain hole and the suction surface is 30 ° ± 5 °, and the included angle γ between the axis of the new drain hole and the axis of the wind power blade is 40 ° ± 55 °; the new drain hole is gradually close to the rear edge of the blade tip part from outside to inside and gradually far away from the axis of the wind power blade.
7. The retrofitting process according to claim 6, wherein in said step of locating and perforating a new drain hole, after said new drain hole is perforated, a finish is applied to the inner wall of said new drain hole.
8. The retrofitting process of any one of claims 4 to 6 wherein said triaxial fabric is selected to be a 1200 g/square meter triaxial fabric of 100mm x 100mm in said step of plugging an existing drain hole.
9. The retrofitting process of claim 8 wherein said triaxial fabric has a pitted outer surface that is flat, wrinkle free and bubble free.
10. The retrofitting process according to claim 9, wherein in said step of painting a predetermined area, it comprises the steps of:
puttying, namely puttying in the preset area to be smooth, curing and polishing;
brushing primer, namely brushing primer on the preset area after the putty is scraped on the preset area, and curing;
brushing finish paint, brushing finish paint on the preset area after brushing the primer on the preset area, and curing;
and brushing aerial mark paint, and brushing transverse empty mark paint on the preset area after finishing brushing the finish paint on the preset area.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101336342A (en) * | 2005-12-02 | 2008-12-31 | Lm玻璃纤维制品有限公司 | Lightning protection system for a wind turbine blade |
| CN102052238A (en) * | 2009-11-02 | 2011-05-11 | 再生动力系统股份公司 | Rotor blade with drainage drill hole |
| CN102834605A (en) * | 2010-03-13 | 2012-12-19 | 堪纳希斯有限公司 | Rotor blade drain for wind power plant and wind power plant |
| WO2018222158A1 (en) * | 2017-05-31 | 2018-12-06 | Atilmis Cevriye Guel | Plasma application for wind turbine blades |
| CN109209783A (en) * | 2018-09-18 | 2019-01-15 | 远景能源（江苏）有限公司 | A kind of method and device of the lightning damage based on noise measuring blade |
-
2020
- 2020-12-09 CN CN202011433194.6A patent/CN112648135B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101336342A (en) * | 2005-12-02 | 2008-12-31 | Lm玻璃纤维制品有限公司 | Lightning protection system for a wind turbine blade |
| CN102052238A (en) * | 2009-11-02 | 2011-05-11 | 再生动力系统股份公司 | Rotor blade with drainage drill hole |
| CN102834605A (en) * | 2010-03-13 | 2012-12-19 | 堪纳希斯有限公司 | Rotor blade drain for wind power plant and wind power plant |
| WO2018222158A1 (en) * | 2017-05-31 | 2018-12-06 | Atilmis Cevriye Guel | Plasma application for wind turbine blades |
| CN109209783A (en) * | 2018-09-18 | 2019-01-15 | 远景能源（江苏）有限公司 | A kind of method and device of the lightning damage based on noise measuring blade |
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| CN112648135A (en) | 2021-04-13 |
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