CN111472927A - Active load reduction large-scale wind driven generator blade - Google Patents

Active load reduction large-scale wind driven generator blade Download PDF

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Publication number
CN111472927A
CN111472927A CN202010274068.4A CN202010274068A CN111472927A CN 111472927 A CN111472927 A CN 111472927A CN 202010274068 A CN202010274068 A CN 202010274068A CN 111472927 A CN111472927 A CN 111472927A
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CN
China
Prior art keywords
blade
wind turbine
fan
wind
structural
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010274068.4A
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Chinese (zh)
Inventor
孟杰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Taiyuan University of Science and Technology
Original Assignee
Taiyuan University of Science and Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Taiyuan University of Science and Technology filed Critical Taiyuan University of Science and Technology
Priority to CN202010274068.4A priority Critical patent/CN111472927A/en
Publication of CN111472927A publication Critical patent/CN111472927A/en
Pending legal-status Critical Current

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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 
    • F03D1/02—Wind motors with rotation axis substantially parallel to the air flow entering the rotor  having a plurality of rotors
    • 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
    • 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
    • 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
    • F03D7/0276—Controlling wind motors  the wind motors having rotation axis substantially parallel to the air flow entering the rotor controlling rotor speed, e.g. variable speed
    • 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
    • F03D7/04—Automatic control; Regulation
    • F03D7/042—Automatic control; Regulation by means of an electrical or electronic controller
    • 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
    • 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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  • Engineering & Computer Science (AREA)
  • 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

The invention relates to a large-scale wind driven generator blade capable of actively reducing load, and belongs to the technical field of wind power generation equipment. The invention aims to solve the technical problems that wind load borne by blades is not effectively reduced and the blades of a wind driven generator are easy to break under strong wind in the existing method. The technical scheme adopted by the invention is as follows: an actively de-burdened large wind turbine blade comprising a wind turbine blade and control wiring, wherein: the wind turbine fan structure is characterized by further comprising a plurality of structural fans, the structural fans are arranged in the wind turbine blades, the control circuit is arranged in the wind turbine blades and attached to the inner wall, one end of the control circuit is connected with the structural fans, and the other end of the control circuit is connected with the controller. The structure fan is composed of fan blades, fan blade fixing nuts, a fan blade frame, clamping screws, a motor, a support and a structure frame. The invention has the advantages of adjusting the pressure difference between the forward swept wing area and the backward swept wing area of the wind turbine blade, changing the load born by the blade structure and the like.

Description

Active load reduction large-scale wind driven generator blade
Technical Field
The invention relates to a large-scale wind driven generator blade capable of actively reducing load, and belongs to the technical field of wind power generation equipment.
Background
With the increase of the installed capacity of a single machine of a large-scale wind driven generator, the size and the self weight of the blade are increased, and the starting power of the wind turbine and the probability of the blade breaking under the dangerous wind speed are improved. The existing solution is mainly inclined to improve the axial force of the locking disc to inhibit the rotation of the blade at the dangerous wind speed, and the blade material is light and the strength of the material is improved, so that the dead weight of the blade is reduced, and the purpose of breaking resistance of the blade is realized. The technical problem that above-mentioned scheme exists is: the wind load born by the blade is not effectively reduced, and the breakage probability under strong wind is higher.
Disclosure of Invention
The invention aims to solve the technical problems that the wind load borne by a blade is not effectively reduced and the blade of a wind driven generator is easy to break under strong wind in the existing method, and provides a large wind driven generator blade capable of actively reducing the load.
In order to achieve the purpose, the invention adopts the technical scheme that:
an actively de-burdened large wind turbine blade comprising a wind turbine blade and control wiring, wherein: the wind turbine fan structure is characterized by further comprising a plurality of structural fans, the structural fans are arranged in the wind turbine blades, the control circuit is arranged in the wind turbine blades and attached to the inner wall, one end of the control circuit is connected with the structural fans, and the other end of the control circuit is connected with the controller.
Furthermore, the structural fan is composed of fan blades, fan blade fixing nuts, a fan blade frame, clamping screws, a motor, a support and a structural frame, wherein the fan blades are axially and uniformly arranged on the fan blade frame through the fan blade fixing nuts; the fan blade frame is arranged on a motor shaft through a clamping screw, the motor is connected with one end of a support through a bolt, and the other end of the support is connected with a structural frame 7 through a bolt; the structural frame and the wind turbine blade are fixed in the wind turbine blade in a welding mode.
The invention has the beneficial effects that:
the invention utilizes the principle of fan blade operation, i.e. Bernoulli principle, to form partial vacuum above the fan blade, and the forward swept wing area and the backward swept wing area form pressure difference to push the structural fan to move, so as to drive the wind turbine blade and the wind driven generator to rotate, thereby achieving the purpose of adjusting the load of the wind turbine blade and the wind driven generator. When the wind driven generator is started, the pressure difference formed by the front and rear swept wing areas of the blades is superposed with the pressure difference of the fan blades when the structural fan operates, so that the pressure difference of the front and rear swept wing areas of the blades is increased, the starting load is reduced, and the starting of the wind driven generator is facilitated; when the wind driven generator is at a dangerous wind speed, the structural fan rotates reversely, so that the pressure difference formed by the forward and backward swept wing areas of the blade is reduced, the wind load borne by the blade is effectively reduced, and the blade is prevented from being broken in a strong wind environment. Compared with the prior art, the invention has the advantages of adjusting the pressure difference between the forward swept wing area and the backward swept wing area of the wind turbine blade, changing the load borne by the blade structure, avoiding the blade from being cracked and broken due to instantaneous and local overload, realizing the stable transition of the rotating speed of the blade and the output power of the wind driven generator and the like.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic top view of a fan according to the present invention;
FIG. 3 is a schematic view of the lower structure of the fan of the present invention;
in the figure: 1-fan blade, 2-fan blade fixing nut, 3-fan blade frame, 4-clamping screw, 5-motor, 6-bracket, 7-structural frame, 8-wind turbine blade, and 9-control circuit.
Detailed Description
The invention is further described below with reference to the figures and examples.
As shown in FIG. 1, the large wind turbine blade with active load reduction in the embodiment comprises a wind turbine blade 8 and a control circuit 9, wherein: the wind turbine blade structure is characterized by further comprising a plurality of structural fans, the structural fans are arranged in the wind turbine blades 8, the control circuit 9 is arranged in the wind turbine blades 8 and attached to the inner wall, one end of the control circuit 9 is connected with the structural fans, and the other end of the control circuit is connected with the controller.
As shown in fig. 2 and 3, the structural fan is composed of a fan blade 1, a fan blade fixing nut 2, a fan blade frame 3, a clamping screw 4, a motor 5, a bracket 6 and a structural frame 7, wherein the fan blade 1 is axially and uniformly arranged on the fan blade frame 3 through the fan blade fixing nut 2; the fan blade frame 3 is arranged on a shaft of a motor 5 through a clamping screw 4, the motor 5 is connected with one end of a support 6 through a bolt, and the other end of the support 6 is connected with a structural frame 7 through a bolt; the structural frame 7 and the wind turbine blade 8 are fixed in the wind turbine blade 8 in a welding mode.
The working principle of the invention is as follows:
① before the wind-driven generator is started, the structural fan is started through the control circuit 9, the air supply direction is opposite to the rotation direction of the wind turbine blade 8, and the air supply quantity of each structural fan is distributed in a decreasing trend along the extension direction of the wind turbine blade from the blade root to the blade tip.
② before the wind power generator stops, the control circuit 9 opens the structure fan, the air supply direction is the same with the wind turbine blade 8 rotation direction, and the air supply quantity of each structure fan from the blade root to the blade tip along the wind turbine blade extension direction presents increasing trend distribution.
③ if the wind power generator is in dangerous wind speed environment, the shutdown process is the same as ②, the air output of the frequency conversion structure fan can be adjusted by the control circuit 9 according to the environment wind speed condition, and the structure fan can still be operated after shutdown.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, or direct or indirect applications in other related fields, which are made by the contents of the present specification, are included in the scope of the present invention.

Claims (2)

1. An actively-relieved large-scale wind turbine blade comprises a wind turbine blade (8) and a control circuit (9), and is characterized in that: the wind turbine blade structure is characterized by further comprising a plurality of structural fans, the structural fans are arranged in the wind turbine blades (8), the control circuit (9) is arranged in the wind turbine blades (8) and attached to the inner wall, one end of the control circuit (9) is connected with the structural fans, and the other end of the control circuit is connected with the controller.
2. An actively de-burdened large wind turbine blade according to claim 1, characterized in that: the structure fan is composed of fan blades (1), fan blade fixing nuts (2), a fan blade frame (3), clamping screws (4), a motor (5), a support (6) and a structure frame (7), wherein the fan blades (1) are axially and uniformly arranged on the fan blade frame (3) through the fan blade fixing nuts (2); the fan blade frame (3) is arranged on a shaft of a motor (5) through a clamping screw (4), the motor (5) is connected with one end of a support (6) through a bolt, and the other end of the support (6) is connected with a structural frame (7) through a bolt; the structural frame (7) and the wind turbine blade (8) are fixed in the wind turbine blade (8) in a welding mode.
CN202010274068.4A 2020-04-09 2020-04-09 Active load reduction large-scale wind driven generator blade Pending CN111472927A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010274068.4A CN111472927A (en) 2020-04-09 2020-04-09 Active load reduction large-scale wind driven generator blade

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010274068.4A CN111472927A (en) 2020-04-09 2020-04-09 Active load reduction large-scale wind driven generator blade

Publications (1)

Publication Number Publication Date
CN111472927A true CN111472927A (en) 2020-07-31

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010274068.4A Pending CN111472927A (en) 2020-04-09 2020-04-09 Active load reduction large-scale wind driven generator blade

Country Status (1)

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CN (1) CN111472927A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114689215A (en) * 2022-03-16 2022-07-01 国网甘肃省电力公司电力科学研究院 Method for monitoring fracture of connecting bolt of blade of wind generating set

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1955459A (en) * 2005-10-27 2007-05-02 通用电气公司 Blade for a rotor of a wind energy turbine
CN207847850U (en) * 2018-01-10 2018-09-11 南京航空航天大学 A kind of pneumatic equipment bladess and wind energy conversion system
CN108894912A (en) * 2018-09-07 2018-11-27 苏州若谷新能源科技有限公司 A kind of wind energy conversion system vortex generator regulating device
JP6498813B1 (en) * 2018-04-11 2019-04-10 株式会社フナボリ Wind power generation system for ventilation fan

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1955459A (en) * 2005-10-27 2007-05-02 通用电气公司 Blade for a rotor of a wind energy turbine
CN207847850U (en) * 2018-01-10 2018-09-11 南京航空航天大学 A kind of pneumatic equipment bladess and wind energy conversion system
JP6498813B1 (en) * 2018-04-11 2019-04-10 株式会社フナボリ Wind power generation system for ventilation fan
CN108894912A (en) * 2018-09-07 2018-11-27 苏州若谷新能源科技有限公司 A kind of wind energy conversion system vortex generator regulating device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114689215A (en) * 2022-03-16 2022-07-01 国网甘肃省电力公司电力科学研究院 Method for monitoring fracture of connecting bolt of blade of wind generating set
CN114689215B (en) * 2022-03-16 2024-02-23 国网甘肃省电力公司电力科学研究院 Wind generating set blade connecting bolt fracture monitoring method

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Application publication date: 20200731

RJ01 Rejection of invention patent application after publication