CN114776534B - Modular wind power blade monitoring structure, system and method - Google Patents
Modular wind power blade monitoring structure, system and method Download PDFInfo
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- CN114776534B CN114776534B CN202210503302.5A CN202210503302A CN114776534B CN 114776534 B CN114776534 B CN 114776534B CN 202210503302 A CN202210503302 A CN 202210503302A CN 114776534 B CN114776534 B CN 114776534B
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 64
- 238000000034 method Methods 0.000 title claims abstract description 12
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- 239000002131 composite material Substances 0.000 claims description 5
- 239000011888 foil Substances 0.000 claims 1
- 230000005611 electricity Effects 0.000 abstract description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 3
- 239000000853 adhesive Substances 0.000 description 9
- 230000001070 adhesive effect Effects 0.000 description 9
- 238000011161 development Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
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- 238000012360 testing method 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
- F03D17/00—Monitoring or testing of wind motors, e.g. diagnostics
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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
- F03D7/00—Controlling wind motors
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The present disclosure relates to the field of wind turbine blade manufacturing technologies, and in particular, to a modular wind turbine blade monitoring structure, system, and method, in the monitoring structure, the wind turbine blade includes a blade root module, a blade leaf module, and a blade tip module, which are fixedly connected in a blade length direction; the blade root module is connected with the middle module, the blade leaf module is connected with the blade tip module, the front edge module is connected with the middle box module, and the middle box module is connected with the rear edge module. This is disclosed through the mode that sets up the monitoring point in each module junction, realizes the monitoring to wind-powered electricity generation blade's structural strength, compares with the correlation technique, can monitor the data of junction department, is convenient for evaluate wind-powered electricity generation blade's performance, has also accumulated the data basis for wind-powered electricity generation blade's modularization.
Description
Technical Field
The disclosure relates to the technical field of wind power blade manufacturing, in particular to a modularized wind power blade monitoring structure, system and method.
Background
The wind power blade is a core component for converting natural wind energy into electric energy of a wind generating set in the wind generating set, and with the fierce development and competition of the technology, the large-scale and light-weight wind power blade gradually becomes the main development stream in the blade field;
in the related art known by the inventor, in order to facilitate manufacturing, transporting and installing of large-scale wind turbine blades, a wind turbine blade is manufactured by using a modular technology, however, the inventor finds that although the modular blade is convenient to install, connection points are numerous, and how to test the structural strength of the connection points is a problem to be solved urgently.
The information disclosed in this background section is only for enhancement of understanding of the general background of the disclosure and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art that is known to a person skilled in the art.
Disclosure of Invention
In view of at least one of the above technical problems, the present disclosure provides a monitoring structure, a monitoring system and a monitoring method for a modularized wind turbine blade, which adopt a novel connection structure, and monitor the wind turbine blade in real time by setting a monitoring point at the connection structure, so as to improve the connection monitoring reliability of the modularized connection.
According to a first aspect of the present disclosure, a modular wind turbine blade monitoring structure is provided, wherein the wind turbine blade comprises a blade root module, a blade leaf module and a blade tip module, which are fixedly connected in a blade length direction;
the blade root module is connected with the middle module, the blade leaf module is connected with the blade tip module, the front edge module is connected with the middle box module, and the middle box module is connected with the rear edge module.
In some embodiments of the present disclosure, strain gauges are attached to the connection surfaces of the blade root module and the blade leaf module and the connection surfaces of the blade leaf module and the blade tip module.
In some embodiments of the present disclosure, the module butt-joint interface between the blade root module and the blade leaf, and the module butt-joint interface between the blade leaf and the blade tip module have an adhesive flange with an L-shaped cross section, the adhesive flange extends to the inner wall of the opposite module, and the strain gauge is covered on the inner wall of the butt-joint interface through the composite material reinforcing layer.
In some embodiments of the present disclosure, the intermediate box module includes a main web, a spar cap connected to both ends of the main web, a trailing edge web, and an intermediate shell, one side of the intermediate shell is connected to one end of the trailing edge web, and the other end is connected to the spar cap on the same side.
In some embodiments of the present disclosure, the spar cap inner side has a strain sensor on at least one side in the main web thickness direction.
In some embodiments of the present disclosure, both sides of the trailing edge web have strain sensors.
In some embodiments of the present disclosure, the trailing edge module has a strain gage proximate the intermediate housing location.
According to a second aspect of the present disclosure, there is also provided a modular wind turbine blade monitoring system comprising:
a strain sensor arranged at a monitoring point on a modular wind blade monitoring structure according to the first aspect of the present disclosure;
the processor is electrically connected with the strain sensor and used for judging whether the strain value at the monitoring point is greater than a set threshold value or not;
and the alarm is electrically connected with the processor and used for giving an alarm when the monitored strain value at the monitoring point is greater than a set threshold value.
In some embodiments of the present disclosure, acceleration sensors are provided at the PS surface, the SS surface, the leading edge, and the trailing edge of the modular wind turbine blade, for monitoring stress of the wind turbine blade;
the processor is further electrically connected with a driving piece of the wind power blade, and when the processor monitors that the strain value at the monitoring point is larger than a set threshold value, the driving piece is controlled to reduce the rotating speed so as to achieve timely unloading.
According to a third aspect of the present disclosure, there is also provided a method for monitoring a modular wind turbine blade, which is applied to the modular wind turbine blade monitoring system according to the second aspect of the present disclosure, and includes the following steps:
pre-burying a strain sensor at a wind power blade connecting point, and fixing acceleration sensors at positions of a PS surface, a SS surface, a front edge and a rear edge of the wind power blade;
the driving blade bears a set load, and whether a strain value under the load exceeds a set threshold value is monitored;
if the pressure exceeds the set threshold, sending an alarm and driving the blades to unload;
if the strain value abnormally increases under the set load and exceeds 20% of the set threshold value, the connection is judged to be damaged.
The beneficial effect of this disclosure does: this is disclosed through divide into the wind-powered electricity generation blade root module at length direction, module and apex module in the leaf, the modularization of wind-powered electricity generation blade has been realized, the manufacturing and processing of large-scale blade of being convenient for, and set up to the leading edge module to the module in the leaf in width direction, middle box module and trailing edge module, the setting of middle module, the structural strength on width direction has been improved, and through the mode that sets up the monitoring point in each module junction, the monitoring to the structural strength of wind-powered electricity generation blade is realized, compare with the correlation technique, can monitor the data of junction, be convenient for assess the performance of wind-powered electricity generation blade, also accumulated the data basis for the modularization of wind-powered electricity generation blade.
Drawings
In order to more clearly illustrate the embodiments of the present disclosure 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 some embodiments described in the present disclosure, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic structural diagram of a modular wind turbine blade according to an embodiment of the present disclosure;
FIG. 2 is a transverse cross-sectional view of a module in a modular wind blade according to an embodiment of the disclosure;
FIG. 3 is a schematic view of the arrangement of monitoring points in FIG. 1 in an embodiment of the present disclosure;
FIG. 4 is a schematic view of the arrangement of monitoring points in FIG. 2 in an embodiment of the present disclosure;
FIG. 5 is a schematic cross-sectional view of a connection face of a blade root module and a blade root module according to an embodiment of the present disclosure;
FIG. 6 is a schematic cross-sectional view of a connection surface between a main web and a spar cap in an embodiment of the present disclosure;
FIG. 7 is a cross-sectional view of the joint surface of the trailing edge web and the intermediate shell in an embodiment of the present disclosure;
FIG. 8 is a cross-sectional structural schematic view of a trailing edge module in an embodiment of the present disclosure;
FIG. 9 is a schematic diagram of a modular wind blade monitoring system in an embodiment of the present disclosure.
Detailed Description
The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are only a part of the embodiments of the present disclosure, and not all of the embodiments.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used in the description of the disclosure herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
As shown in fig. 1, the monitoring structure of the modular wind turbine blade includes a blade root module 10, a blade leaf module 20 and a blade tip module 30, which are fixedly connected in the length direction of the blade; in the embodiment of the disclosure, the fixed connection of the three is formed by bonding the structural adhesive, and after the structural adhesive is cured, the carbon fiber or glass fiber reinforced layer is used for paving and reinforcing;
as shown in fig. 2, in the embodiment of the present disclosure, the modules 20 in the blade leaf are connected in blocks in the width direction of the blade, and include a leading edge module 21, an intermediate box-type module 22, and a trailing edge module 23, the overall structural strength of the modules 20 in the blade leaf is enhanced by the arrangement of the intermediate box-type module 22, and further, in order to monitor the connection points of the modules, as shown by the circled portions in fig. 3 and 4, the connection point of the blade root module 10 and the intermediate module, the connection point of the modules 20 in the blade leaf and the blade tip module 30, the connection point of the leading edge module 21 and the intermediate box-type module 22, and the connection point of the intermediate box-type module 22 and the trailing edge module 23 all have monitoring points. By means of arrangement of each monitoring point and arrangement of the strain sensor 50 at the monitoring point, real-time strain monitoring at each connecting point is achieved, and stress monitoring of the whole blade is achieved;
in the above embodiment, the wind power blade is divided into the blade root module 10, the blade root module 20 and the blade tip module 30 in the length direction, the modularization of the wind power blade is realized, the manufacturing and processing of large blades are facilitated, the blade root module 20 is set to be the front edge module 21, the middle box-type module 22 and the rear edge module 23 in the width direction, the middle module is arranged, the structural strength in the width direction is improved, the monitoring of the structural strength of the wind power blade is realized by arranging the monitoring points at the joints of the modules, compared with the related art, the data at the joints can be monitored, the performance of the wind power blade is conveniently evaluated, and a data base is also accumulated for the modularization of the wind power blade.
On the basis of the above embodiment, further, as shown in fig. 5, in the embodiment of the present disclosure, a strain gauge 40 is attached to the connection surface between the root module 10 and the leaf module 20, and the connection surface between the leaf module 20 and the tip module 30. The strain gauge 40 is of a sheet structure and is attached to the inner wall of the butt joint surface, when defects such as steps or gaps occur on the butt joint surface, data can be sensed from the strain gauge 40, and the butt joint surface connection condition can be monitored through the arrangement of the structure;
specifically, with continued reference to fig. 5, in the embodiment of the present disclosure, the joint surface between the blade root module 10 and the blade leaf module 20, and the joint surface between the blade leaf module 20 and the blade tip module 30 have an adhesive flange 11 with an L-shaped cross section, the adhesive flange 11 extends into the inner wall of the opposite module, and the strain gauge 40 covers the inner wall of the joint surface through the composite material reinforcing layer 12. The bonding flange 11 with the L-shaped cross section is a connecting flange arranged on one of the two butt-joint modules, the extending surface of the flange is arranged in the bonding flange, the bonding flange 11 with the L shape extends into the other of the two butt-joint modules through butt joint with the other of the two butt-joint modules, and then structural adhesive is injected into a gap between the bonding flange 11 with the L shape and the inner wall of the other module in the glue injection process through a mode of injecting the structural adhesive into the butt-joint surface, so that the connection strength of the bonding surface is improved; in the embodiment of the present disclosure, the thickness of the part close to the L-shaped bonding flange 11 is thickened, and the overflowing structural adhesive is in a wedge-shaped structure which becomes thinner gradually towards the part far away from the butt joint surface, so that on one hand, the stress concentration can be reduced, and on the other hand, the strain gauge 40 can be fixed conveniently; in the embodiment of the present disclosure, the strain gauge 40 is fixed by adhesion and further covered by a composite material reinforcing layer to improve the reliability of the fixation.
As shown in fig. 6, in the embodiment of the present disclosure, with continued reference to fig. 2, the intermediate box module 22 includes a main web 22a, a spar cap 22b connected to two ends of the main web 22a, a rear edge web 22c, and an intermediate shell 22d, one side of the intermediate shell 22d is connected to one end of the rear edge web 22c, and the other end is connected to the spar cap 22b on the same side. When the connection is specifically carried out, the bonding surface is an inclined surface so as to improve the strength of the connection, and after the bonding and the fixation are carried out, the connection is covered by a plurality of reinforcing layers so as to further improve the structural strength of the connection;
further, as shown in fig. 6, in the disclosed embodiment, the spar cap 22b has a strain sensor 50 on at least one side of the inboard side in the thickness direction of the primary web 22 a. The strain sensor 50 is disposed toward the longitudinal direction of the main web 22a, and by this arrangement, it is possible to detect whether local deformation or stress concentration occurs at the joint surface; it should be noted here that in the embodiment of the present disclosure, the strain sensor 50 may be disposed on only one side, or may be disposed on both sides;
as shown in FIG. 7, in the disclosed embodiment, both sides of the trailing edge web 22c have strain sensors 50. Here, the two sides may be fixed to the trailing edge web 22c in the thickness direction, or as shown in fig. 7, one side is fixed to the trailing edge web 22c, and the other side is fixed to the intermediate casing 22d connected thereto, and similarly, the strain sensors 50 are also arranged along the length direction of the trailing edge web 22c to realize the stress monitoring at the joint surface.
In the disclosed embodiment, the trailing edge module 23 has a strain gage 40 near the middle housing 22d, as shown in FIG. 8. The strain gauge 40 is attached to the inner wall of the trailing edge module 23 and attached along the width direction of the lobe module 20, and is further fixed through the composite material reinforcing layer 12, so that the monitoring and analysis of the stress at the trailing edge are realized;
in another aspect of the present disclosure, there is also provided a modular wind blade monitoring system as shown in fig. 9, comprising:
a strain sensor 50 arranged at a monitoring point on the above-mentioned modular wind turbine blade monitoring structure;
a processor electrically connected to the strain sensor 50 for determining whether the strain value at the monitoring point is greater than a set threshold;
and the alarm is electrically connected with the processor and used for giving an alarm when the monitored strain value at the monitoring point is greater than a set threshold value.
Through the setting of above-mentioned system, can realize the monitoring of connecting to modular blade to through the treater setting, can analyze out the atress condition of point when wind-powered electricity generation blade operation, and then realize the correction to defect department, with the bulk joint strength who improves the blade.
In the embodiment of the disclosure, acceleration sensors are arranged on the PS surface, the SS surface, the front edge and the rear edge of the modularized wind power blade and used for monitoring the stress of the wind power blade; the PS surface is the leeward surface of the wind power blade, the SS surface is the windward surface of the wind power blade, and the load condition of the wind power blade can be further monitored by arranging the acceleration sensor;
the processor is also electrically connected with a driving piece of the wind power blade, and when the processor monitors that the strain value at the monitoring point is greater than a set threshold value, the driving piece is controlled to reduce the rotating speed so as to realize timely unloading.
In an embodiment of the present disclosure, a method for monitoring a modular wind turbine blade is further provided, where the modular wind turbine blade monitoring system is applied, and the method includes the following steps:
pre-burying a strain sensor 50 at a connecting point of the wind power blade, and fixing acceleration sensors at positions of a PS surface, an SS surface, a front edge and a rear edge of the wind power blade;
the driving blade bears a set load, and whether a strain value under the load exceeds a set threshold value is monitored;
if the pressure exceeds the set threshold, sending an alarm and driving the blades to unload;
if the strain value abnormally increases under the set load and exceeds 20% of the set threshold value, the connection is judged to be damaged.
In the embodiment of the present disclosure, by the arrangement of the acceleration sensor and the strain sensor 50, the load at the position can be monitored, and when the blade bears a certain load, the strain value at the monitoring point can be monitored; by analyzing the strain and the load, the following effects can be achieved; on the first hand, a safety threshold can be set for prejudging in advance to reduce the risk of damage at the connecting position, for example, the strain reaches the designed 5000 microstrain threshold, and at the moment, the fan can be controlled by the processor to unload in time, so that the load borne by the blade is reduced, and the connection safety of the connecting position is ensured; secondly, whether damage occurs or not can be monitored, for example, at a monitoring point, under a certain load, the strain is abnormally increased and exceeds 20% of the normal condition at ordinary times, the situation that damage possibly occurs at the position is judged, at the moment, an operation and maintenance worker is dispatched to go to check, and if damage can be timely maintained, the risk of further damage is reduced; and in the third aspect, the stress condition of the modularized connection during operation can be monitored in real time, a valuable data base is provided for subsequent research, and the technical development of the modularized blade is facilitated.
It will be understood by those skilled in the art that the present disclosure is not limited to the embodiments described above, which are presented solely for purposes of illustrating the principles of the disclosure, and that various changes and modifications may be made to the disclosure without departing from the spirit and scope of the disclosure, which is intended to be covered by the claims. The scope of the disclosure is defined by the appended claims and equivalents thereof.
Claims (8)
1. A modularized wind power blade monitoring structure is characterized in that a wind power blade comprises a blade root module, a blade leaf module and a blade tip module which are fixedly connected in the length direction of the blade;
the blade root module is connected with the middle box type module, the blade leaf module is connected with the blade tip module, the front edge module is connected with the middle box type module, and the middle box type module is connected with the rear edge module;
strain foils are attached to the connecting surface of the blade root module and the blade leaf module and the connecting surface of the blade leaf module and the blade tip module;
the blade root module and the blade leaf module are in butt joint with each other, and the blade leaf module and the blade tip module are in butt joint with each other, bonding flanges with L-shaped sections are arranged at the butt joint with each other, the bonding flanges extend into the inner wall of the corresponding module, and the strain gauge is covered on the inner wall of the butt joint through a composite material reinforcing layer.
2. The modular wind blade monitoring structure as claimed in claim 1, wherein the intermediate box module comprises a main web, a spar cap connected to both ends of the main web, a trailing edge web, and an intermediate shell, one side of the intermediate shell is connected to one end of the trailing edge web, and the other end is connected to the spar cap on the same side.
3. The modular wind blade monitoring structure of claim 2, wherein the spar cap inner side has a strain sensor on at least one side in the main web thickness direction.
4. The modular wind blade monitoring structure of claim 2, wherein the trailing edge web has strain sensors on both sides.
5. The modular wind blade monitoring structure of claim 2 wherein the trailing edge module has a strain gage proximate the intermediate shell location.
6. A modular wind blade monitoring system, comprising:
a strain sensor disposed at a monitoring point on the modular wind blade monitoring structure of claim 1;
the processor is electrically connected with the strain sensor and used for judging whether the strain value at the monitoring point is greater than a set threshold value or not;
and the alarm is electrically connected with the processor and used for giving an alarm when the monitored strain value at the monitoring point is greater than a set threshold value.
7. The modular wind blade monitoring system of claim 6 wherein acceleration sensors are provided on the PS, SS, leading and trailing edges of the modular wind blade for monitoring forces on the wind blade;
the processor is further electrically connected with a driving piece of the wind power blade, and when the processor monitors that the strain value at the monitoring point is larger than a set threshold value, the driving piece is controlled to reduce the rotating speed so as to achieve timely unloading.
8. A modular wind blade monitoring method applying the modular wind blade monitoring system of claim 6, comprising the steps of:
pre-burying a strain sensor at a wind power blade connecting point, and fixing acceleration sensors at positions of a PS surface, a SS surface, a front edge and a rear edge of the wind power blade;
the driving blade bears a set load, and whether a strain value under the load exceeds a set threshold value is monitored;
if the pressure exceeds the set threshold, sending an alarm and driving the blades to unload;
if the strain value abnormally increases under the set load and exceeds 20% of the set threshold value, the connection is judged to be damaged.
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| CN202210503302.5A CN114776534B (en) | 2022-05-09 | 2022-05-09 | Modular wind power blade monitoring structure, system and method |
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| CN202210503302.5A CN114776534B (en) | 2022-05-09 | 2022-05-09 | Modular wind power blade monitoring structure, system and method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107850042A (en) * | 2015-06-09 | 2018-03-27 | 维斯塔斯风力系统有限公司 | Modular wind turbine blade |
| WO2019120417A1 (en) * | 2017-12-21 | 2019-06-27 | Vestas Wind Systems A/S | Modular wind turbine blade and associated method of manufacture |
| CN111075638A (en) * | 2019-12-20 | 2020-04-28 | 南京航空航天大学 | Large-scale wind turbine blade rigidity improving device |
| CN111550363A (en) * | 2020-05-22 | 2020-08-18 | 北京博比风电科技有限公司 | Blade tip winglet, wind turbine blade and blade synergy calculation method thereof |
| CN113323797A (en) * | 2021-08-03 | 2021-08-31 | 常州市宏发纵横新材料科技股份有限公司 | Modularized wind power blade |
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- 2022-05-09 CN CN202210503302.5A patent/CN114776534B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107850042A (en) * | 2015-06-09 | 2018-03-27 | 维斯塔斯风力系统有限公司 | Modular wind turbine blade |
| WO2019120417A1 (en) * | 2017-12-21 | 2019-06-27 | Vestas Wind Systems A/S | Modular wind turbine blade and associated method of manufacture |
| CN111075638A (en) * | 2019-12-20 | 2020-04-28 | 南京航空航天大学 | Large-scale wind turbine blade rigidity improving device |
| CN111550363A (en) * | 2020-05-22 | 2020-08-18 | 北京博比风电科技有限公司 | Blade tip winglet, wind turbine blade and blade synergy calculation method thereof |
| CN113323797A (en) * | 2021-08-03 | 2021-08-31 | 常州市宏发纵横新材料科技股份有限公司 | Modularized wind power blade |
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Effective date of registration: 20221026 Address after: 213127 No. 329, Huanghai Road, Xinbei District, Changzhou City, Jiangsu Province Patentee after: Xinchuang Carbon Valley Group Co.,Ltd. Address before: 213135, No. 28, Lijiang Road, textile industry garden, Xixia Town villa, Xinbei District, Jiangsu, Changzhou Patentee before: CHANGZHOU HONGFA ZONGHENG ADVANCED MATERIAL TECHNOLOGY Co.,Ltd. |