CN112392651A - Blade preventive enhancement method based on wind power environment change - Google Patents
Blade preventive enhancement method based on wind power environment change Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 230000003449 preventive effect Effects 0.000 title claims abstract description 7
- 230000008859 change Effects 0.000 title abstract description 9
- 238000013461 design Methods 0.000 claims abstract description 20
- 230000002787 reinforcement Effects 0.000 claims abstract description 10
- 230000002708 enhancing effect Effects 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims abstract description 5
- 239000000835 fiber Substances 0.000 claims description 36
- 239000004744 fabric Substances 0.000 claims description 28
- 238000010438 heat treatment Methods 0.000 claims description 22
- 238000004458 analytical method Methods 0.000 claims description 11
- 239000000853 adhesive Substances 0.000 claims description 9
- 230000001070 adhesive effect Effects 0.000 claims description 8
- 238000005485 electric heating Methods 0.000 claims description 8
- 230000008439 repair process Effects 0.000 claims description 7
- 239000011162 core material Substances 0.000 claims description 6
- 239000003365 glass fiber Substances 0.000 claims description 6
- 238000004364 calculation method Methods 0.000 claims description 4
- 238000005498 polishing Methods 0.000 claims description 4
- 239000012779 reinforcing material Substances 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 238000012423 maintenance Methods 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 238000004088 simulation Methods 0.000 claims description 3
- 239000002023 wood Substances 0.000 claims description 3
- 230000002159 abnormal effect Effects 0.000 claims description 2
- 239000012945 sealing adhesive Substances 0.000 claims description 2
- 230000007480 spreading Effects 0.000 claims description 2
- 238000003892 spreading Methods 0.000 claims description 2
- 238000004381 surface treatment Methods 0.000 claims description 2
- 230000002411 adverse Effects 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 2
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- 238000011156 evaluation Methods 0.000 description 2
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- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
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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
- F03D3/00—Wind motors with rotation axis substantially perpendicular to the air flow entering the rotor
- F03D3/06—Rotors
- F03D3/061—Rotors characterised by their aerodynamic shape, e.g. aerofoil profiles
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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
- F03D3/00—Wind motors with rotation axis substantially perpendicular to the air flow entering the rotor
- F03D3/06—Rotors
- F03D3/062—Rotors characterised by their construction elements
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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
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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
- Y02E10/74—Wind turbines with rotation axis perpendicular to the wind direction
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- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Wind Motors (AREA)
Abstract
A method for preventively enhancing blades based on wind power environment changes aims at performing local patch reinforcement on the rear edge of the PS side of the blade when actual extreme wind power is larger than original design wind power. Aiming at enhancing the blades in a wind field with large annual wind speed change to ensure the operation safety of the blades, the method only enhances the inner part of the PS side, has no influence on the pneumatic efficiency, and cannot generate adverse effect on the balance of the wind wheel, and belongs to preventive enhancement, and the blades can be put into normal use after the reinforced materials are cured.
Description
Technical Field
The invention relates to the field of wind power plant operation, in particular to a method for preventively enhancing blades based on wind power environment change.
Background
In recent years, wind field environments are changing, reference standards are updating, design technologies are advancing, and higher requirements on blade designs are met. The blades in the operation of the wind field belong to early products, the fact that the actual wind power level of the wind field is higher than the design value of the blades in the original design is discovered recently, the actual crazy of the wind field is different every year through investigation, and the individual year actually exceeds the wind energy measurement and evaluation value, so that the normal operation of the blades is threatened.
Disclosure of Invention
The invention aims to provide a method for enhancing the preventability of blades based on the change of wind power environment, which only enhances the interior of a PS side aiming at a wind field with large annual wind speed change so as to ensure the operation safety of the blades, has no influence on the pneumatic efficiency and does not generate adverse influence on the balance of a wind wheel, and belongs to preventive enhancement, and the blades can be put into normal use after a reinforcing material is cured.
The embodiment of the invention is realized by the following technical scheme:
a method for preventively enhancing blades based on wind power environment changes aims at performing local patch reinforcement on the rear edge of the PS side of the blade when actual extreme wind power is larger than original design wind power.
Further, the localized areas of the blade PS side trailing edge that need to be enhanced are selected, including,
obtaining design parameters of the blade, wherein the design parameters comprise annual average wind speed;
selecting a new extreme year average wind speed, and carrying out simulation calculation on the blade load to obtain an area with a larger load amplitude so as to possibly exceed a safety margin;
and carrying out finite element analysis on the blade according to the region with larger load increase, wherein the finite element analysis comprises fiber direction strength check and inter-fiber strength check, obtaining a fiber direction strain cloud picture and an inter-fiber strain cloud picture, and obtaining a local region to be reinforced of the PS side rear edge of the blade by combining safety margin analysis.
Further, the local patch includes,
firstly, performing surface treatment on a selected local area, polishing a bright surface, polishing and removing redundant adhesives, and confirming that no obvious bulge exists in a repair area;
then, using adhesive to hang the back edge;
then, cloth spreading treatment is carried out;
finally, heating and curing are carried out.
Furthermore, in the cloth paving treatment, multiple layers of fiber cloth are sequentially overlapped and paved, wherein the innermost layer and the outermost layer adopt glass fiber biaxial cloth, the other layers adopt glass fiber unidirectional cloth, and the direction of the paved fiber cloth is consistent with the fiber direction of the original paving layer;
the innermost layer of fiber cloth is symmetrically laid by taking the edge of the rear edge core material as the center;
and in the axial direction of the inner side of the PS shell, the innermost layer of fiber cloth is laid in a selected local area, and other layers of fiber cloth are laid at a certain distance from each layer to the front edge.
Further, in the heating and curing step, a heating blanket or a vacuum heating belt can be used for assisting heating;
the vacuum heating belt is manufactured by attaching a sealing adhesive tape on the edge of a paving layer area, sealing the edge by using a vacuum bag, reserving an air inlet and an air outlet, arranging an electric hair drier and an electric heating gun at the air inlet, raising the air outlet of the equipment by using other materials such as wood or metal and the like to enable the air inlet to be more than 30mm away from the surface of a blade, arranging a thermometer at the air outlet, communicating a power supply from a power supply socket in a fan, starting the electric hair drier and the electric heating gun, properly adjusting the air inlet, checking the temperature of the thermometer, heating for 2 hours at the temperature of 50-70 ℃, and continuously heating for 1 hour after the hardening is confirmed.
Furthermore, the blade can be put into use after the reinforcing material in the patch is solidified, and later maintenance is carried out at the moment to check whether the reinforcement is abnormal or not.
The technical scheme of the embodiment of the invention at least has the following advantages and beneficial effects: aiming at enhancing the blades in a wind field with large annual wind speed change to ensure the operation safety of the blades, the method only enhances the inner part of the PS side, has no influence on the pneumatic efficiency, and cannot generate adverse effect on the balance of the wind wheel, and belongs to preventive enhancement, and the blades can be put into normal use after the reinforced materials are cured.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic diagram of a PS-side trailing edge patch enhancement according to an embodiment of the present invention;
FIG. 2 provides a schematic representation of the inner multi-layer coating of the PS housing according to an embodiment of the present invention.
Icon: 100-trailing edge UD, 200-trailing edge slab, 300-adhesive, 400-UD reinforcement, 500-core.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are usually placed in when used, the terms are only used for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements indicated must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The design of the wind power blade directly influences the conversion efficiency of wind energy, directly influences the annual energy production, and needs to ensure the reliable quality and the superior performance of the wind power blade. In recent years, wind field environment is changed continuously, reference standards are updated continuously, design technology is advanced continuously, especially the latest issued GL2015 standard is more comprehensive in consideration of various operating condition changes of each blade, and higher requirements are provided for blade design.
The inventor finds that after a certain type of blade is designed to be put into use for a period of time, a wind farm owner reacts to the fact that the actual wind power level of a wind farm where the blade is located is higher than a design value, and the safety of the blade is threatened. Through field investigation, the actual wind conditions of the wind field are different every year, and the wind energy measurement evaluation value is actually exceeded in individual years. The annual average wind speed is a main basis for classifying the wind area and calculating the load.
The following is described in detail with respect to a specific type of blade, so that the overall description is clear:
according to 2MW grade DF108 blade developed in a certain year, the annual average wind speed is 6.5m/S, V1 is 34m/S, V50 is 42.5m/S, I is designed according to IEC-S wind fieldref15m/s is 0.14, the annual average temperature is 10 ℃, the operation temperature range is-10 ℃ to +40 ℃, and the average air density is 1.225kg/m3。
The annual average wind speed is the main basis for classifying wind zones and calculating loads. Based on this situation, to evaluate the safety of the blade, the simulation calculation needs to be performed again on the load. The average annual wind speed of 7m/s is used as an extreme condition in calculation, Iref15m/s at 0.14, the loads of the four main working conditions of blade flapping (positive and negative) and blade shimmy (positive and negative) are compared. The inventor compares the original load of each selected point position (11 points are selected between 0m and 50m and are different) with the new load, and finds that the load lifting of the interface of each position of the blade is mostly between 5 and 16 percent. Because the structure of the blade has certain safety margin, the structure of most areas of the blade is still safe. However, in the region near the maximum chord length in the shimmy direction (region 7 to 13 m), the load amplitude is greatly increased, the safety margin of the region near the maximum chord length is small, and after the load is increased, the structural safety of the blade is in danger.
According to the condition of load increase, finite element analysis is carried out on the blade, and the finite element analysis comprises fiber direction strength check and fiber-to-fiber strength check.
In the fiber direction strength check, the maximum strain is 4100um/m and appears in the region between the blade root and the maximum chord length of the PS blade under the My-max working condition, and the strain is found to be far smaller than the allowable fiber direction strain strength (in the original design, the tensile strain is 8800um/m and the compressive strain is 6000um/m) according to the My-max working condition fiber direction strain cloud chart, so the strength requirement is met.
In the strength check among fibers, the maximum strain appears before and after 9m of the PS trailing edge under the Mx-min working condition, the maximum transverse tensile strain reaches 2440um/m micro strain and appears in the area near the PS trailing edge with the maximum chord length, and the design allowable value of the transverse tensile strain is 2370 um/m. The safety margin is designed to be large at other places except the vicinity of the maximum chord length of the PS in the shimmy direction, and even if the load is increased, the safety is enough.
From the above check, it was found that the strength between fibers in the vicinity of the PS-side trailing edge 8m is insufficient, and in long-term operation, there is a safety risk, and in order to make up for the insufficient strength of the fibers there, the PS-side trailing edge may be locally reinforced.
According to the strain cloud picture among fibers under the Mx-min working condition, an area with larger strain is obtained through analysis according to the transverse tensile strain design allowable value (the transverse tensile strain design allowable value of the 2 MW-grade DF108 blade is 2370um/m) in the scheme and by combining with a certain safety margin design.
Through detailed analysis, the positions 7-13m of the trailing edge are determined to belong to regions with larger strain, and concentrated reinforcement is needed to be carried out along a single band region of the trailing edge during repair.
Determining that the positions of the trailing edges 7-13m belong to a region with larger strain, uniformly distributing at the cut-off positions of the core materials of 6.5m-13.5m of the PS-side trailing edge, and performing preventive enhancement, and referring to fig. 1, fig. 1 shows the relationship among a repaired blade PS-side trailing edge structure comprising a trailing edge UD, a trailing edge flat plate, an adhesive structure formed by adhesive treatment, a UD enhancement part and the original core materials. The specific repair enhancement scheme is as follows:
firstly, the surface of a cloth supplementing area is treated, the area needing cloth supplementing enhancement is polished to be bright, redundant adhesives are polished and removed, and the repair area is confirmed to have no obvious bulge.
The trailing edge is then taped flat using an adhesive.
Then, the cloth is spread. Referring to fig. 2, inside the PS casing, within a range of 6.5m to 13.5m in the axial direction, 6 layers of cloth are manually (or mechanically) pasted, the fiber cloth is laid flat, without wrinkles and fiber bends, and the fiber ends are smoothed, wherein the first layer and the sixth layer are made of glass fiber biaxial cloth AX-800 and 300mm wide, the second layer to the 5 th layer are made of glass fiber unidirectional cloth UD-1200 and 200mm wide, the first layer is laid symmetrically with the edge of the rear edge core material as the center, and the subsequent 5 layers of cloth are made of 'each layer staggered by 20mm toward the front edge'. In the axial position of the inner side of the PS shell, the first layer is laid at 7-13m, the second layer is laid at 6.9-13.1m, the third layer is laid at 6.8-13.2m, the fourth layer is laid at 6.7-13.3m, the fifth layer is laid at 6.6-13.4m, and the sixth layer is laid at 6.5-13.5 m.
Finally, a curing operation is performed, assisted by heating using a heating blanket or vacuum heating tape. The heating belt is manufactured by sticking a sealing rubber strip on the edge of a paving area, sealing by using a vacuum bag, reserving an air inlet and an air outlet, arranging the air inlet at a paving starting point and arranging the air outlet at a paving point. An electric hair drier and an electric heating gun are arranged at the air inlet, the air outlet of the device is raised by other materials such as wood or metal and the like to be more than 30mm away from the surface of the blade, and a thermometer is arranged at the air outlet. The power supply is connected with a power socket in the fan, the electric hair drier and the electric heating gun are started, the air inlet is properly adjusted, the temperature of the thermometer is checked, the electric hair drier and the electric heating gun are heated for 2 hours at the temperature of 50-70 ℃, and the electric hair drier and the electric heating gun are continuously heated for 1 hour after hardening is confirmed.
In the heating process, attention needs to be paid to that at least 1 person needs to track and monitor the whole process, the air outlet of the heating equipment is ensured not to directly face the surface of the blade or be tightly attached to the film to blow, and burning caused by local overheating is avoided.
Wherein it is necessary to ensure that the direction of the used fiber cloth is consistent with the direction of the original layer fiber.
After the PS side rear edge repair layout part is subjected to reinforcement treatment by the repair reinforcement scheme, the Mx-min working condition analysis is carried out again by adopting a finite element model, and an Mx-min working condition fiber-to-fiber strain cloud picture after the rear edge is reinforced is obtained. After enhancement, the maximum strain between fibers at the trailing edge of the PS is reduced to 2110um/m, which is lower than the allowable strain 2370um/m and is within a safe range.
The blade in the prior operation is repaired by adopting the repairing and reinforcing scheme so as to reduce the operation risk, and especially aiming at wind fields with large annual wind speed change and large temperature difference in four seasons, the operation safety of the blade can be ensured after the blade is reinforced.
For the scheme, besides the safety guarantee when the wind power generator adapts to the new standard and is higher in wind field, the wind power generator also has the following characteristics:
1. the enhancement scheme only enhances the inner part of the PS side, does not need external enhancement, and does not change the appearance of the blade, so that the aerodynamic efficiency is not influenced;
2. the total weight of the single blade surface reinforcement is 15kg, the added weight is about 0.12 percent of the weight of the blade in consideration of the limit condition (only 1 blade is reinforced, and the other 2 blades are not reinforced), the requirement that the weight is lower than the mutual difference of 0.5 percent is met, the added moment is about 0.05 percent and the requirement that the moment is lower than the mutual difference of 0.1 percent is met, and the balance of the wind wheel cannot be influenced; if the weight of the three blades is increased at the same position, the balance is not adversely affected;
3. the weight of the blade is increased by only about 0.1 percent, and the strength of the whole machine part is basically not adversely affected;
4. this scheme is the preventative reinforcing, and the structure of blade itself is normal, therefore reinforcing material solidification back, and the blade can be put into normal use (need not to restrict power operation) to the blade security is more guaranteed, can carry out one time inspection when later maintenance, confirms whether the reinforcing appears unusually.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to 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 (6)
1. A method for preventively enhancing blades based on wind environment changes is characterized in that: and local patch reinforcement is performed on the rear edge of the PS side of the blade for preventive enhancement when the actual extreme wind power is larger than the original design wind power.
2. The method of claim 1, wherein the method comprises:
the localized areas of the blade PS side trailing edge that need to be enhanced are selected, including,
obtaining design parameters for a blade, the design parameters including an annual average wind speed;
selecting a new extreme year average wind speed, and carrying out simulation calculation on the blade load to obtain an area with a larger load amplitude so as to possibly exceed a safety margin;
and carrying out finite element analysis on the blade according to the region with larger load increase, wherein the finite element analysis comprises fiber direction strength check and inter-fiber strength check, obtaining a fiber direction strain cloud picture and an inter-fiber strain cloud picture, and obtaining a local region to be reinforced of the PS side rear edge of the blade by combining safety margin analysis.
3. The method of claim 1, wherein the method comprises:
the local patch is composed of a cloth cover,
firstly, performing surface treatment on a selected local area, polishing a bright surface, polishing and removing redundant adhesives, and confirming that no obvious bulge exists in a repair area;
then, using adhesive to hang the back edge;
then, cloth spreading treatment is carried out;
finally, heating and curing are carried out.
4. The method of claim 3, wherein the method comprises:
in the cloth paving treatment, multiple layers of fiber cloth are sequentially overlaid and paved, wherein the innermost layer and the outermost layer adopt glass fiber biaxial cloth, the other layers adopt glass fiber unidirectional cloth, and the direction of the paved fiber cloth is consistent with the fiber direction of the original paving layer;
the innermost layer of fiber cloth is symmetrically laid by taking the edge of the rear edge core material as the center;
and in the axial direction of the inner side of the PS shell, the innermost layer of fiber cloth is laid in a selected local area, and other layers of fiber cloth are laid at a certain distance from each layer to the front edge.
5. The method of claim 3, wherein the method comprises:
in the heating and curing step, a heating blanket or a vacuum heating belt can be used for auxiliary heating;
the vacuum heating belt is manufactured by attaching a sealing adhesive tape on the edge of a paving layer area, sealing the edge with a vacuum bag, reserving an air inlet and an air outlet, arranging an electric hair drier and an electric heating gun at the air inlet, raising the air outlet of the equipment by using other materials such as wood or metal and the like to enable the air inlet to be more than 30mm away from the surface of a blade, arranging a thermometer at the air outlet, communicating a power supply from a power supply socket in a fan, starting the electric hair drier and the electric heating gun, properly adjusting the air inlet, checking the temperature of the thermometer, heating for 2 hours at the temperature of 50-70 ℃, and continuously heating for 1 hour after the hardening is confirmed.
6. The method of claim 1, wherein the method comprises: the blade can be put into use after the reinforcing material is solidified in the patch, and later maintenance is carried out at the moment to determine whether the reinforcement is abnormal.
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100143146A1 (en) * | 2008-12-30 | 2010-06-10 | General Electric Company | Flatback insert for turbine blades |
| US20130108455A1 (en) * | 2010-07-01 | 2013-05-02 | Lm Glasfiber A/S | Wind turbine blade for a rotor of a wind turbine |
| CN104114856A (en) * | 2011-12-16 | 2014-10-22 | 维斯塔斯风力系统有限公司 | Wind turbine blades |
| CN104653411A (en) * | 2014-12-24 | 2015-05-27 | 中国科学院工程热物理研究所 | Wind turbine blade with tail edge reinforced prefabricated member |
| CN106182809A (en) * | 2016-09-09 | 2016-12-07 | 国电联合动力技术(连云港)有限公司 | Thickness layer-spread structure of direct bonding area of rear edge of fan blade and adjusting method |
| CN107618192A (en) * | 2017-09-28 | 2018-01-23 | 国电联合动力技术有限公司 | A kind of wind power generation unit blade bonding angle and preparation method thereof |
| CN109986806A (en) * | 2017-12-29 | 2019-07-09 | 北京金风科创风电设备有限公司 | Wind generating set blade outer reinforcement manufacturing method and wind generating set blade |
| CN209855954U (en) * | 2019-03-18 | 2019-12-27 | 上纬新材料科技股份有限公司 | Wind power blade with front edge beam structure |
| CN210422886U (en) * | 2019-07-05 | 2020-04-28 | 国电联合动力技术(连云港)有限公司 | Fan blade trailing edge bonding structure |
-
2020
- 2020-10-13 CN CN202011091009.XA patent/CN112392651B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100143146A1 (en) * | 2008-12-30 | 2010-06-10 | General Electric Company | Flatback insert for turbine blades |
| US20130108455A1 (en) * | 2010-07-01 | 2013-05-02 | Lm Glasfiber A/S | Wind turbine blade for a rotor of a wind turbine |
| CN104114856A (en) * | 2011-12-16 | 2014-10-22 | 维斯塔斯风力系统有限公司 | Wind turbine blades |
| CN104653411A (en) * | 2014-12-24 | 2015-05-27 | 中国科学院工程热物理研究所 | Wind turbine blade with tail edge reinforced prefabricated member |
| CN106182809A (en) * | 2016-09-09 | 2016-12-07 | 国电联合动力技术(连云港)有限公司 | Thickness layer-spread structure of direct bonding area of rear edge of fan blade and adjusting method |
| CN107618192A (en) * | 2017-09-28 | 2018-01-23 | 国电联合动力技术有限公司 | A kind of wind power generation unit blade bonding angle and preparation method thereof |
| CN109986806A (en) * | 2017-12-29 | 2019-07-09 | 北京金风科创风电设备有限公司 | Wind generating set blade outer reinforcement manufacturing method and wind generating set blade |
| CN209855954U (en) * | 2019-03-18 | 2019-12-27 | 上纬新材料科技股份有限公司 | Wind power blade with front edge beam structure |
| CN210422886U (en) * | 2019-07-05 | 2020-04-28 | 国电联合动力技术(连云港)有限公司 | Fan blade trailing edge bonding structure |
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