CN111075638B - Large-scale wind turbine blade rigidity improving device - Google Patents

Large-scale wind turbine blade rigidity improving device Download PDF

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Publication number
CN111075638B
CN111075638B CN201911326138.XA CN201911326138A CN111075638B CN 111075638 B CN111075638 B CN 111075638B CN 201911326138 A CN201911326138 A CN 201911326138A CN 111075638 B CN111075638 B CN 111075638B
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China
Prior art keywords
wind turbine
blade
turbine blade
steel wire
stress
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CN201911326138.XA
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Chinese (zh)
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CN111075638A (en
Inventor
柯世堂
杨青
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Nanjing University of Aeronautics and Astronautics
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Nanjing University of Aeronautics and Astronautics
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Priority to CN201911326138.XA priority Critical patent/CN111075638B/en
Publication of CN111075638A publication Critical patent/CN111075638A/en
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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
    • 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
    • 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 
    • F03D7/02—Controlling wind motors  the wind motors having rotation axis substantially parallel to the air flow entering the rotor
    • F03D7/0296—Controlling wind motors  the wind motors having rotation axis substantially parallel to the air flow entering the rotor to prevent, counteract or reduce noise emissions
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
    • G01L5/0028—Force sensors associated with force applying means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
    • G01S17/88—Lidar systems specially adapted for specific applications
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
    • G01S7/4802—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00 using analysis of echo signal for target characterisation; Target signature; Target cross-section
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
    • G01S7/481—Constructional features, e.g. arrangements of optical elements
    • 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 a device for improving the rigidity of a large wind turbine blade, which comprises a blade displacement monitoring system, a blade stress monitoring system and a rigidity performance adjusting system which are arranged on the large wind turbine blade, wherein the blade displacement monitoring system comprises a transmitting end, a receiving end, a calculation integration module and an imaging surface, the rigidity performance adjusting system comprises a drawing system, a steel wire, an anchor plate, a tension sensor, a fixing bolt and a signal transmission module, and the blade stress monitoring system consists of a plurality of stress sensors and a data integration module.

Description

Large-scale wind turbine blade rigidity improving device
Technical Field
The invention relates to the technical field of wind engineering, in particular to a device for improving the rigidity of a large-scale wind turbine blade.
Background
The blade of the wind turbine is long and soft, various vibrations are easily generated under the action of natural wind or earthquake, the vibration phenomena such as blade tip waving and the like easily cause the fatigue phenomena of key parts such as the root part of the blade and the like, the service life of the whole wind turbine system is further influenced, and serious potential safety hazards are caused. The traditional wind turbine blade vibration control mostly adopts pneumatic or mechanical measures, however, the passive treatment is difficult to be applied to the real wind environment and the earthquake action of a complex and changeable boundary layer. Therefore, it is particularly important for such structural components to provide vibration suppression and safe operation to provide equipment that can effectively and directly improve the stiffness performance of the blade.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide a device for improving the stiffness performance of a large wind turbine blade, which improves the stiffness performance of the blade in real time by using a drawing system to suppress the vibration of a structural member, and integrates a blade displacement monitoring system and a blade stress monitoring system to achieve better controllability of the improvement of the stiffness performance of the blade.
In order to achieve the technical purpose, the technical scheme adopted by the invention is as follows:
a large wind turbine blade rigidity improving device, wherein: the system comprises a blade displacement monitoring system, a blade stress monitoring system and a rigidity performance adjusting system which are arranged on blades of a large-scale wind turbine, wherein the blade displacement monitoring system comprises a transmitting end, a receiving end, a calculation integration module and an imaging surface, the transmitting end, the receiving end and the imaging surface are all fixed at the blade tip part of the large-scale wind turbine, the transmitting end can transmit laser signals to the imaging surface, the imaging surface can reflect the laser signals, the receiving end faces the imaging surface and is used for receiving the laser signals, a certain distance is reserved between the receiving end and the imaging surface along the axial direction of the blade, the receiving end is connected with the calculation integration module, the calculation integration module can judge whether the large-scale wind turbine blade needs vibration suppression according to the vibration information of the laser signals received by the receiving end, the rigidity performance adjusting system comprises a plurality of systems which, each rigidity performance adjusting system comprises a drawing system, a steel wire, an anchor plate, a tension sensor, a fixing bolt and a signal transmission module, wherein the drawing system, the anchor plate and the fixing bolt are sequentially arranged along the axial direction of the large-scale wind turbine blade, the anchor plate and the fixing bolt are fixed on the large-scale wind turbine blade, the drawing system is fixed on the anchor plate, one end of the steel wire is fixedly connected with the fixing bolt, the other end of the steel wire penetrates through the anchor plate to be connected with the drawing system, the tension sensor is installed on the steel wire and used for detecting the tension borne by the steel wire, the signal transmission module is respectively connected with the calculation integration module, the drawing system and the tension sensor, the calculation integration module can control the drawing system to draw the steel wire through the signal transmission module, the steel wire can pre-tighten the wind turbine blade part between the anchor plate and the fixing bolt, so that, the stress tightness of the steel wire is monitored by the computing integration module, the blade stress monitoring system is composed of a plurality of stress sensors and a data integration module, the stress sensors are installed near the fixing bolts and used for detecting the stress of the stress concentration part of the blade of the large-scale wind turbine, the stress sensors are connected with the data integration module, and the data integration module sends an alarm signal when the numerical value acquired by the stress sensors is larger than a preset critical value.
In order to optimize the technical scheme, the specific measures adopted further comprise:
a backing plate is fixed on one side face of the anchor plate connected with the drawing system, and the backing plate is arranged between the anchor plate and the drawing system in a cushioning mode.
The steel wire is composed of a plurality of sections of elastic sections and a plurality of sections of connecting sections, the elastic sections and the connecting sections are alternately connected in series, and when the drawing system draws the steel wire, the elastic sections stretch to store potential energy.
The transmitting terminal, the calculation integration module, the signal transmission module and the data integration module are all provided with batteries for supplying power.
The signal transmission module is a wireless signal transmission module.
The receiving end is a camera.
Compared with the prior art, the invention has the beneficial effects that:
the invention is suitable for a large-scale wind turbine structure, is provided with a blade displacement monitoring system, a blade stress monitoring system and a rigidity performance adjusting system, can apply prestress on the blade through the rigidity performance adjusting system, inhibits the vibration amplitude of the blade of the large-scale wind turbine, relieves the unfavorable vibration phenomenon generated under the action of natural wind environment or earthquake, can effectively ensure that the blade applies prestress on the blade only under the condition of inhibiting the vibration amplitude by means of the blade stress monitoring system and the displacement monitoring system, and ensures the integral safety and the working reliability of the blade in the application process, thereby being beneficial to the normal operation of wind turbine facilities.
Drawings
FIG. 1 is a general schematic view of a blade stiffness performance improvement system.
FIG. 2 is a schematic drawing system.
FIG. 3 is a schematic view of a blade displacement monitoring system.
Wherein the reference numerals are: the device comprises a blade displacement monitoring system 1, a transmitting end 11, a receiving end 12, a calculation integration module 13, an imaging plane 14, a blade stress monitoring system 2, a stress sensor 21, a data integration module 22, a rigidity performance adjusting system 3, a drawing system 31, a steel wire 32, an elastic section 32a, a connecting section 32b, an anchor plate 33, a tension sensor 34, a fixing bolt 35, a signal transmission module 36, a backing plate 37 and a large-scale wind turbine blade 4.
Detailed Description
Embodiments of the present invention are described in further detail below with reference to the accompanying drawings.
The rigidity improving device for the large wind turbine blade of the embodiment comprises: the system comprises a blade displacement monitoring system 1, a blade stress monitoring system 2 and a rigidity performance adjusting system 3 which are arranged on a large-scale wind turbine blade 4, wherein the blade displacement monitoring system 1 comprises a transmitting end 11, a receiving end 12, a calculation integration module 13 and an imaging surface 14, the transmitting end 11, the receiving end 12 and the imaging surface 14 are all fixed at the tip of the large-scale wind turbine blade 4, the transmitting end 11 can transmit laser signals to the imaging surface 14, the imaging surface 14 can reflect the laser signals, the receiving end 12 is right opposite to the imaging surface 14 and is used for receiving the laser signals, a certain distance is reserved between the receiving end 12 and the imaging surface 14 along the axial direction of the blade, the receiving end 12 is connected with the calculation integration module 13, the calculation integration module 13 can judge whether the large-scale wind turbine blade 4 needs vibration suppression or not according to the trembling information of the laser signals, the rigidity performance adjusting systems 3 are distributed at the blade root, the blade leaf and the blade tip of the large wind turbine blade 4, each rigidity performance adjusting system 3 comprises a drawing system 31, a steel wire 32, an anchor plate 33, a tension sensor 34, a fixing bolt 35 and a signal transmission module 36, the drawing system 31, the anchor plate 33 and the fixing bolt 35 are sequentially arranged along the axial direction of the large wind turbine blade 4, the anchor plate 33 and the fixing bolt 35 are fixed on the large wind turbine blade 4, the drawing system 31 is fixed on the anchor plate 33, one end of the steel wire 32 is fixedly connected with the fixing bolt 35, the other end of the steel wire passes through the anchor plate 33 to be connected with the drawing system 31, the tension sensor 34 is arranged on the steel wire 32 and used for detecting the tension borne by the steel wire 32, the signal transmission module 36 is respectively connected with the calculation integration module 13, the drawing system 31 and the tension sensor 34, the calculation integration module 13, the steel wire 32 is used for pre-tightening the wind turbine blade part between the anchor plate 33 and the fixing bolt 35, so that the vibration amplitude of the large wind turbine blade 4 is restrained, the tension sensor 34 can transmit signals to the calculation integration module 13, the calculation integration module 13 is used for monitoring the stress relaxation degree of the steel wire 32, the blade stress monitoring system 2 is composed of a plurality of stress sensors 21 and a data integration module 22, the stress sensors 21 are installed near the fixing bolt 35 and used for detecting the stress of the stress concentration part of the large wind turbine blade 4, the stress sensors 21 are connected with the data integration module 22, and the data integration module 22 sends an alarm signal when the numerical value acquired by the stress sensors 21 is larger than a preset critical value.
In the embodiment, a backing plate 37 is fixed to the side of the anchor plate 33 connected to the pulling system 31, and the backing plate 37 is interposed between the anchor plate 33 and the pulling system 31.
In the embodiment, the steel wire 32 is composed of a plurality of elastic segments 32a and a plurality of connecting segments 32b, the elastic segments 32a and the connecting segments 32b are alternately connected in series, and when the drawing system 31 draws the steel wire 32, the elastic segments 32a extend to store potential energy.
In the embodiment, the transmitting terminal 11, the calculation integration module 13, the signal transmission module 36 and the data integration module 22 are all installed with a battery for supplying power.
In an embodiment, the signal transmission module 36 is a wireless signal transmission module.
In an embodiment, the receiving end 12 is a camera.
The device for improving the rigidity performance of the large-scale wind turbine blade is shown in figure 1 in the front view of the whole system, and comprises a blade displacement monitoring system 1, a blade stress monitoring system 2 and a rigidity performance adjusting system 3.
The blade displacement monitoring system 1 is used for acquiring real-time displacement of the blade tip; the blade stress monitoring system 2 is used for acquiring the stress of a key part of the blade so as to control the coordination of the rigidity performance adjusting system 3 and the overall safety of the structural member; the stiffness performance adjusting system 3 is used to achieve suppression of the blade vibration phenomenon.
The application method of the device for improving the rigidity performance of the large wind turbine blade comprises the following steps:
the large wind turbine is subjected to the action of external environment load, the blades vibrate, when the displacement exceeds the displacement limit value, the blade displacement monitoring system 1 sends out an alarm instruction through a self-contained wireless transmission structure, and an operator starts a displacement recording program in the blade displacement monitoring system 1 according to the alarm instruction.
And (3) a rigidity performance adjusting system is started, the calculation integration module 13 controls the drawing system 31 to adjust the rigidity of the blade by tensioning the steel wire 32, meanwhile, the blade stress monitoring system 2 controls the integral stress of the blade not to exceed a limit value through stress sensing data of a plurality of parts of the blade, and the blade rigidity performance adjusting system stops working after the stress limit value is exceeded.
During the continuous operation of the stiffness adjustment system, the tension sensor 34 belonging to the system is used for monitoring the stress relaxation phenomenon, and after the stress relaxation phenomenon exceeds a limit value, the tension sensor is used for alarming to complete replacement.
The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may be made by those skilled in the art without departing from the principle of the invention.

Claims (6)

1. A large-scale wind turbine blade rigidity improving device comprises a blade displacement monitoring system (1) and a blade stress monitoring system (2) which are installed on a large-scale wind turbine blade (4), wherein the blade displacement monitoring system (1) comprises a transmitting end (11), a receiving end (12), a calculation integration module (13) and an imaging surface (14), the transmitting end (11), the receiving end (12) and the imaging surface (14) are all fixed at the tip part of the large-scale wind turbine blade (4), the transmitting end (11) can transmit laser signals to the imaging surface (14), the imaging surface (14) can reflect the laser signals, the receiving end (12) faces the imaging surface (14) and is used for receiving the laser signals, a certain distance is reserved between the receiving end (12) and the imaging surface (14) along the axial direction of the blade, and the receiving end (12) is connected with the calculation integration module (13), the calculating and integrating module (13) can judge whether the large wind turbine blade (4) needs vibration suppression according to the trembling information of the laser signals received by the receiving end (12), and the blade stress monitoring system (2) is composed of a plurality of stress sensors (21) and a data integrating module (22), and is characterized in that: the rigidity improving device for the large-scale wind turbine blade further comprises a plurality of rigidity performance adjusting systems (3), the rigidity performance adjusting systems (3) are distributed at the blade root, the blade leaf and the blade tip of the large-scale wind turbine blade (4), each rigidity performance adjusting system (3) comprises a drawing system (31), a steel wire (32), an anchor plate (33), a tension sensor (34), a fixing bolt (35) and a signal transmission module (36), the drawing system (31), the anchor plate (33) and the fixing bolt (35) are sequentially arranged along the axial direction of the large-scale wind turbine blade (4), the anchor plate (33) and the fixing bolt (35) are fixed on the large-scale wind turbine blade (4), the drawing system (31) is fixed on the anchor plate (33), one end of the steel wire (32) is fixedly connected with the fixing bolt (35), and the other end of the steel wire penetrates through the anchor plate (33) to be connected with the drawing system (31), the tension sensor (34) is arranged on the steel wire (32) and used for detecting tension borne by the steel wire (32), the signal transmission module (36) is respectively connected with the calculation integration module (13), the drawing system (31) and the tension sensor (34), the calculation integration module (13) can control the drawing system (31) to draw the steel wire (32) through the signal transmission module (36), so that the steel wire (32) pre-tensions a wind turbine blade part between the anchor plate (33) and the fixing bolt (35) to inhibit the vibration amplitude of the large wind turbine blade (4), the tension sensor (34) can transmit signals to the calculation integration module (13) to enable the calculation integration module (13) to monitor the stress tightness of the steel wire (32), the stress sensor (21) is arranged near the fixing bolt (35) and used for detecting the stress magnitude of the stress concentration part of the large wind turbine blade (4), the stress sensor (21) is connected with the data integration module (22), and the data integration module (22) sends an alarm signal when the numerical value acquired by the stress sensor (21) is greater than a preset critical value.
2. The rigidity improving device for the large-scale wind turbine blade as claimed in claim 1, wherein: a backing plate (37) is fixed on one side face of the anchor plate (33) connected with the drawing system (31), and the backing plate (37) is arranged between the anchor plate (33) and the drawing system (31).
3. The rigidity improving device for the large-scale wind turbine blade as claimed in claim 2, wherein: the steel wire (32) consists of a plurality of elastic sections (32a) and a plurality of connecting sections (32b), the elastic sections (32a) and the connecting sections (32b) are alternately connected in series, and when the drawing system (31) draws the steel wire (32), the elastic sections (32a) extend to store potential energy.
4. The rigidity improving device for the large-scale wind turbine blade as claimed in claim 3, wherein: and the transmitting terminal (11), the calculation integration module (13), the signal transmission module (36) and the data integration module (22) are all provided with batteries for supplying power.
5. The rigidity improving device for the large-scale wind turbine blade as claimed in claim 4, wherein: the signal transmission module (36) is a wireless signal transmission module.
6. The rigidity improving device for the large-scale wind turbine blade as claimed in claim 5, wherein: the receiving end (12) is a camera.
CN201911326138.XA 2019-12-20 2019-12-20 Large-scale wind turbine blade rigidity improving device Active CN111075638B (en)

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Publication number Priority date Publication date Assignee Title
CN112648137B (en) * 2021-01-19 2021-12-24 兰州理工大学 Wind power blade multi-particle series speed amplification type vibration reduction device and connection method
CN113090445B (en) * 2021-04-29 2022-06-21 中国华能集团清洁能源技术研究院有限公司 Resistance adding device and method for blade structure of horizontal-axis wind generating set
CN114776534B (en) * 2022-05-09 2022-09-30 常州市宏发纵横新材料科技股份有限公司 Modular wind power blade monitoring structure, system and method

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WO2010046403A2 (en) * 2008-10-23 2010-04-29 Vestas Wind Systems A/S A wind turbine and a method for monitoring a wind turbine
DK2295795T3 (en) * 2009-08-06 2016-09-05 Alstom Wind Sl System and method for damping vibrations in a wind turbine
US10330082B2 (en) * 2012-08-17 2019-06-25 Lm Wp Patent Holding A/S Blade deflection monitoring system
KR101408785B1 (en) * 2012-09-05 2014-06-18 (주)아이비티 A stiffened rotor blade for equivalent aerodynamic, inertia and structural loads
CN104074368B (en) * 2014-06-27 2017-01-18 湖南省交通科学研究院 Concrete structure reinforcing method, self-anchored prestress assembly, assembled tensioning assembly
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CN106286119B (en) * 2016-08-23 2018-11-16 湘潭大学 A kind of device that can automatically adjust wind energy conversion system flexible blade rigidity

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