CN112483307B - Three-section pivoting type wind driven generator blade - Google Patents
Three-section pivoting type wind driven generator blade Download PDFInfo
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- CN112483307B CN112483307B CN202011155263.1A CN202011155263A CN112483307B CN 112483307 B CN112483307 B CN 112483307B CN 202011155263 A CN202011155263 A CN 202011155263A CN 112483307 B CN112483307 B CN 112483307B
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- 238000010248 power generation Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor
- F03D1/06—Rotors
- F03D1/065—Rotors characterised by their construction elements
- F03D1/0675—Rotors characterised by their construction elements of the blades
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor
- F03D1/06—Rotors
- F03D1/0608—Rotors characterised by their aerodynamic shape
- F03D1/0633—Rotors characterised by their aerodynamic shape of the blades
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- 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
- F03D7/022—Adjusting aerodynamic properties of the blades
- F03D7/0236—Adjusting aerodynamic properties of the blades by changing the active surface of the wind engaging parts, e.g. reefing or furling
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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
- 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
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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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- 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 utility model provides a three-section pivoting type aerogenerator blade, includes blade main part and rotary device, its characterized in that: each blade main body consists of a root blade, a middle blade and a tail blade, the root blade, the middle blade and the tail blade can be driven by a rotating device to rotate respectively, and the rotating axis of the root blade is perpendicular to the main axis of the fan. The lengths of the root blade 1, the middle blade 14 and the tail blade 12 are denoted as L1, L2 and L3, respectively, and L1: l2: l3 ═ 3: 2: 1. the rotation of the middle blade and the tail blade relative to the root blade is respectively in two forms of 0 degree and 90 degrees, so that the rotation angle of the tail blade or the rotation angles of the middle blade and the tail blade can be changed according to the change of wind speed and wind direction, the area of the blades can be changed, and the output power of the wind driven generator can be adjusted.
Description
Technical Field
The invention relates to a wind driven generator blade, in particular to a three-section pivoting type wind driven generator blade.
Background
The principle of wind power generation is that wind power is used for driving blades of a wind driven generator to rotate, the rotating speed is increased through a speed increaser to enable the generator to generate power, and the formula of the output power of the wind driven generator is as follows:
in the formula (I), the compound is shown in the specification,
p: output power of the wind turbine, W;
eta: full efficiency of the wind turbine;
ρ: air density, kg. m-3；
A: swept area of blade, m2；
V: wind speed, m.s-1。
According to the above formula, the output power of the wind driven generator is proportional to the total efficiency of the wind driven generator and the swept area of the blade. At present, the blades of the large wind driven generator which is practically applied generally adopt the blade integral pitch-changing technology, that is, along with the change of the wind speed, the whole blade rotates around the central shaft of the blade, so that the attack angle of the blade is changed within a certain range (generally 0-90 degrees), thereby changing the swept area of the blade, preventing the output power of the wind driven generator from being overloaded, and ensuring the stable power output as much as possible. However, the conventional blade integral pitch control technology has a complicated mechanical structure, so that the weight of a machine head and the maintenance cost are increased. In addition, the larger the area of the fan blade is, the higher the solidity of the wind wheel is, the smaller the tip speed ratio of the wind wheel is, and the lower the total efficiency of the fan is. If the area of the fan blade can be directly changed, the area of the blade is increased when the wind speed is increased, the total efficiency of the fan is reduced, the area of the blade is reduced when the wind speed is reduced, the total efficiency of the fan is increased, and the stability of the output power of the wind driven generator can be ensured under the condition of changing the wind speed. Therefore, a wind turbine blade with variable blade area is called one of the urgent needs in the art.
Disclosure of Invention
In order to solve the problems in the prior art, the invention aims to provide a three-section pivoting type wind driven generator blade, which can adjust the swept area of the blade and the output power of a fan by adopting a plurality of separated gears in different wind speeds and wind directions.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the utility model provides a three-section pivoting type aerogenerator blade, includes blade main part and rotary device, its characterized in that: the blade main body consists of a root blade 1, a middle blade 14 and a tail blade 12, the root blade 1, the middle blade 14 and the tail blade 12 can be driven by a rotating device to respectively rotate, and the rotating axis 11 of the root blade is vertical to the main axis 19 of the fan; in the root blade 1, a control motor a2 is connected with a driving gear a3 in an interference fit manner, a driving gear a3 is meshed with a driven gear a16, one end of a rotating shaft a15 is connected with the driven gear a16 in the interference fit manner, the middle of the rotating shaft a15 penetrates through two bearings a5 which are fixed on a support a4, and the other end of the rotating shaft a5 extends into and is fixed with the middle blade 14; in the middle blade 14, a control motor b6 is connected with a driving gear b7 in an interference fit manner, a driving gear b7 is meshed with a driven gear b13, one end of a rotating shaft b10 is connected with a driven gear b13 in an interference fit manner, the middle part of the rotating shaft b10 penetrates through two bearings b8 which are fixed on a support b9, and the other end of the rotating shaft b10 extends into and is fixed with the tail blade 12; the anemometer 18 is connected with the control system 17, and the control system 17 is respectively connected with the control motor a2 and the control motor b 6.
The middle blade 14 rotates by 0 ° and 90 ° with respect to the root blade 1, and the tail blade 12 rotates by 0 ° and 90 ° with respect to the root blade 1.
The lengths of the root blade 1, the middle blade 14 and the tail blade 12 are denoted as L1, L2 and L3, respectively, and L1: l2: l3 ═ 3: 2: 1.
the rotating device is driven by a motor, and a wind speed signal is transmitted to the control system 17 by the wind speed measuring instrument 18, so that the motor a2 is controlled to drive the driving gear a3 and the driven gear a16 and drive the rotating shaft a15 to rotate together, and the rotation of the middle blade 14 is realized; similarly, the wind speed measuring instrument transmits a wind speed signal to the control system 17, so that the control motor b6 drives the driving gear b7 and the driven gear b13 to drive the rotating shaft b10 to rotate together, thereby realizing the rotation of the tail blade 12.
When the wind speed is less than 3m/s, the wind driven generator is not started; when the wind speed is increased to 3m/s or more but less than 10m/s, the wind speed measuring instrument 18 transmits a wind speed signal to the control system 17, the control system 17 controls the driving gear a3 and the driving gear b7 respectively, and the middle blade 14 and the tail blade 12 are both rotated to a 90-degree state relative to the root blade 1; when the wind speed is continuously increased to 10m/s or more but less than 20m/s, the wind speed measuring instrument 18 transmits a wind speed signal to the control system 17, the control system 17 controls the driving gear a3 to rotate the middle blade 14 to a 0-degree state relative to the root blade 1, the control system 17 controls the driving gear b7 to rotate the tail blade 12 to a 90-degree state relative to the root blade 1, the blade area is increased, the solidity is improved, the wind wheel tip speed ratio is reduced, the power generation efficiency is further reduced, and the power generation power is ensured to be constant; when the wind speed is continuously increased to 20m/s or more but not higher than 25m/s, the wind speed measuring instrument 18 transmits a wind speed signal to the control system 17, the control system 17 respectively controls the driving gear a3 and the driving gear b7, the middle blade 14 and the tail blade 12 are both rotated to be 0 degrees relative to the root blade 1, the blade area is continuously increased, the fan efficiency is reduced, and the stable generating power is maintained; and when the wind speed is more than 25m/s, the wind driven generator stops working.
Compared with the prior art, the invention has the following advantages:
in the running process of the three-section axial rotation type wind driven generator blade, the rotation angles of the tail blade 12 or the tail blade 12 and the middle blade 14 can be rapidly changed according to wind speed information fed back by a wind speed measuring instrument to form different blade forms, the area of the blade is changed to adapt to the change of wind speed and wind direction, wind energy is captured better, stable output power is adjusted, and therefore the efficiency and the quality of wind power generation are improved.
Drawings
FIG. 1 is a schematic view of the internal structure of a three-stage pivoting wind turbine blade according to the present invention.
FIG. 2 is a schematic view of the blade area of the tail blade of the three-stage pivoting wind turbine blade of the present invention rotating 90 degrees.
FIG. 3 is a schematic view of the blade area when the middle blade and the tail blade of the three-section pivoting type wind driven generator blade rotate together by 90 degrees.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
The invention discloses a three-section pivoting type wind driven generator blade, which comprises a blade main body and a rotating device, and is characterized in that: the blade main body consists of a root blade 1, a middle blade 14 and a tail blade 12, the middle blade 14 and the tail blade 12 can be driven by a rotating device to respectively rotate, and the rotation axis 11 of the middle blade and the rotation axis 12 of the tail blade are perpendicular to the main axis 19 of the fan.
As a preferred embodiment of the invention, as shown in fig. 1, the blade body consists of a root blade 1, a central blade 14 and a tail blade 12, the rotation axis 11 of which is perpendicular to the main axis 19 of the fan; in the root blade 1, a control motor a2 is connected with a driving gear a3 in an interference fit manner, a driving gear a3 is meshed with a driven gear a16, one end of a rotating shaft a15 is connected with the driven gear a16 in the interference fit manner, the middle of the rotating shaft a15 penetrates through two bearings a5 which are fixed on a support a4, and the other end of the rotating shaft a5 extends into and is fixed with the middle blade 14; in the middle blade 14, a control motor b6 is connected with a driving gear b7 in an interference fit manner, a driving gear b7 is meshed with a driven gear b13, one end of a rotating shaft b10 is connected with a driven gear b13 in an interference fit manner, the middle part of the rotating shaft b10 penetrates through two bearings b8 which are fixed on a support b9, and the other end of the rotating shaft b10 extends into and is fixed with the tail blade 12; the anemometer 18 is connected with the control system 17, and the control system 17 is respectively connected with the control motor a2 and the control motor b 6. The rotating device is driven by a motor, a wind speed signal is transmitted to the control system 17 by the wind speed measuring instrument 18, so that the control motor a2 drives the driving gear a3 and the driven gear a16 to rotate, the rotating shaft a15 penetrates through the root blade 1 and the middle blade 14 to play a role in connection and support, the left side of the rotating shaft a15 is limited by two bearings a5 and a bracket a4 and can rotate inside the root blade 1, the right side of the rotating shaft a15 is fixed on the middle blade 14 and rotates together with the middle blade 14, and the rotation of the middle blade 14 relative to the root blade 1 is realized under the drive of the control motor a2 and the transmission mechanism. Similarly, the control system 17 controls the motor b6 to rotate according to the wind speed signal of the anemoscope 18, the control motor b6 drives the driving gear b7 and the driven gear b13, the rotating shaft b10 penetrates through the whole middle blade 14 and the tail blade 12 to play a role in connection and support, the left side of the rotating shaft b10 is limited by two bearings b8 and a bracket b9 and can rotate inside the middle blade 14, the right side of the rotating shaft b10 is fixed to the tail blade 12 and can drive the tail blade 12 to rotate together, so that the middle blade 14 rotates relative to the root blade 1. The middle blade 14 and the trailing blade 12 both have a 0 ° and a 90 ° configuration with respect to the rotation of the root blade 1. And when the wind speed is more than 25m/s, the wind driven generator is not started. When the wind speed is reduced to 25m/s or less but not less than 20m/s, the anemometer 18 transmits a wind speed signal to the control system 17, the control system 17 controls the driving gear a3 and the driving gear b7 to rotate the middle blade 14 and the tail blade 12 to a 0 ° configuration with respect to the root blade 1, and at this time, the fan blade is the sum of the areas of the root blade 1, the middle blade 14 and the tail blade 12, as shown in fig. 1. The area of the blade shown in fig. 1 is the largest and the fan efficiency is the lowest.
Fig. 2 is a schematic view of the blade area of the trailing blade 12 of the present invention rotated 90. When the wind speed is reduced to below 20m/s but not less than 10m/s, the wind speed measuring instrument 18 transmits a wind speed signal to the control system 17, the control system 17 controls the driving gear a3 to rotate the middle blade 14 to a 0 degree state relative to the root blade 1, and the control system 17 controls the driving gear b7 to rotate the tail blade 12 to a 90 degree state relative to the root blade 1, and the blade area of the fan blade is the sum of the areas of the root blade 1 and the middle blade 14, as shown in fig. 2. The area of the blade shown in fig. 2 is centered and the fan efficiency is also centered.
Fig. 3 is a schematic view of the blade area when the middle blade 14 and the tail blade 12 of the present invention are rotated together by 90 °. When the wind speed is reduced to below 10m/s but not less than 3m/s, the wind speed measuring instrument 18 transmits a wind speed signal to the control system 17, the control system 17 controls the driving gear a3 and the driving gear b7 to rotate the middle blade 14 and the tail blade 12 to a 90-degree state relative to the root blade 1, and the blade area of the fan blade is the area of the root blade 1, as shown in fig. 3. The area of the blade shown in fig. 3 is the smallest and the fan efficiency is the highest. And when the wind speed is less than 3m/s, the wind driven generator stops working.
The invention can selectively change the rotation angles of the tail blade 12 or the tail blade 12 and the middle blade 14 to form different blade forms, adjust the generating efficiency of the fan by changing the area of the blade, adapt to the change of different wind speed ranges and wind directions and stabilize the output power of the wind driven generator.
The lengths of the root blade 1, the middle blade 14 and the tail blade 12 are denoted as L1, L2 and L3, respectively, and L1: l2: l3 ═ 3: 2: 1. the gear can be divided more reasonably by selecting the proper length proportion among all the parts, and the stress load on the blades is improved.
Claims (1)
1. The utility model provides a three-section pivoting type aerogenerator blade, includes blade main part and rotary device, its characterized in that: the blade main body consists of a root blade (1), a middle blade (14) and a tail blade (12), and the rotation axis (11) of the blade main body is vertical to the main axis (19) of the fan; in the root blade (1), a control motor a (2) is connected with a driving gear a (3) in an interference fit manner, the driving gear a (3) is meshed with a driven gear a (16), one end of a rotating shaft a (15) is connected with the driven gear a (16) in the interference fit manner, the middle of the rotating shaft a (15) penetrates through two bearings a (5) which are fixed on a support a (4), and the other end of the rotating shaft a (15) extends into a middle blade (14) and is fixed with the middle blade; in the middle blade (14), a control motor b (6) is connected with a driving gear b (7) in an interference fit manner, the driving gear b (7) is meshed with a driven gear b (13), one end of a rotating shaft b (10) is connected with the driven gear b (13) in the interference fit manner, the middle of the rotating shaft b passes through two bearings b (8) which are fixed on a support b (9), and the other end of the rotating shaft b extends into and is fixed with a tail blade (12); the wind speed measuring instrument (18) is connected with the control system (17), and the control system (17) is respectively connected with the control motor a (2) and the control motor b (6); the rotation of the middle blade (14) and the tail blade (12) relative to the root blade (1) respectively has two forms of 0 degree and 90 degrees, and the specific working mode is as follows: when the wind speed is increased to 3m/s or more but less than 10m/s, both the middle blade (14) and the tail blade (12) are rotated to a form of 90 degrees with respect to the root blade (1); when the wind speed is increased to 10m/s or more but less than 20m/s, the middle blade (14) rotates to a 0-degree form relative to the root blade (1), and the tail blade (12) rotates to a 90-degree form relative to the root blade (1); when the wind speed continues to increase to 20m/s and above but not above 25m/s, both the central blade (14) and the trailing blade (12) rotate to a configuration of 0 ° relative to the root blade (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011155263.1A CN112483307B (en) | 2020-10-26 | 2020-10-26 | Three-section pivoting type wind driven generator blade |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011155263.1A CN112483307B (en) | 2020-10-26 | 2020-10-26 | Three-section pivoting type wind driven generator blade |
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| CN112483307A CN112483307A (en) | 2021-03-12 |
| CN112483307B true CN112483307B (en) | 2022-04-05 |
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| CN202056007U (en) * | 2011-04-29 | 2011-11-30 | 三一电气有限责任公司 | High-power wind generator and blade thereof |
| CN102606420A (en) * | 2012-04-16 | 2012-07-25 | 国电联合动力技术有限公司 | Large wind driven power generator and sectional type blade thereof |
| CN102758725A (en) * | 2011-04-29 | 2012-10-31 | 远景能源（丹麦）有限公司 | Wind turbine and related control method |
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| CN205805825U (en) * | 2016-06-16 | 2016-12-14 | 西安交通大学 | A kind of wind power generation blade of three sections of parallel folds |
| CN109751189A (en) * | 2017-11-07 | 2019-05-14 | 上海交通大学 | A kind of wind-driven generator and its blade |
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| JP4277290B1 (en) * | 2008-10-14 | 2009-06-10 | 良三 太田 | Wind power generator |
| JP5285516B2 (en) * | 2009-06-30 | 2013-09-11 | 株式会社三井三池製作所 | Jet fan |
| CN101638995B (en) * | 2009-09-04 | 2012-05-23 | 西安交通大学 | Three degree of freedom regulating device of moving blades in fluid machinery |
| DK177554B1 (en) * | 2012-05-15 | 2013-10-07 | Envision Energy Denmark Aps | Method and equipment for turning a blade or a blade part for a wind turbine during production or installation |
| CN103291552B (en) * | 2013-06-17 | 2015-04-22 | 浙江大学宁波理工学院 | Multi-blade multi-driving-paddle wind machine structure |
| CN107100790B (en) * | 2017-05-24 | 2020-06-19 | 湖北师范大学 | Self-adaptive wind paddle structure of wind driven generator |
| CN108266313A (en) * | 2018-02-27 | 2018-07-10 | 青岛华创风能有限公司 | A kind of low pneumatic noise Wind turbines |
| CN208870736U (en) * | 2018-09-13 | 2019-05-17 | 国电联合动力技术有限公司 | A kind of low wind speed wind power generator blade and the wind power generating set containing it |
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2020
- 2020-10-26 CN CN202011155263.1A patent/CN112483307B/en active Active
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|---|---|---|---|---|
| CN202056007U (en) * | 2011-04-29 | 2011-11-30 | 三一电气有限责任公司 | High-power wind generator and blade thereof |
| CN102758725A (en) * | 2011-04-29 | 2012-10-31 | 远景能源（丹麦）有限公司 | Wind turbine and related control method |
| CN102606420A (en) * | 2012-04-16 | 2012-07-25 | 国电联合动力技术有限公司 | Large wind driven power generator and sectional type blade thereof |
| CN103016261A (en) * | 2012-12-07 | 2013-04-03 | 清华大学 | Two-sectional variable-pitch and fixed-pitch combined blade device for large wind-driven generator |
| CN103016276A (en) * | 2012-12-07 | 2013-04-03 | 清华大学 | Two-sectional inclined folding blade device for large wind-driven generator |
| CN205805825U (en) * | 2016-06-16 | 2016-12-14 | 西安交通大学 | A kind of wind power generation blade of three sections of parallel folds |
| CN109751189A (en) * | 2017-11-07 | 2019-05-14 | 上海交通大学 | A kind of wind-driven generator and its blade |
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| CN112483307A (en) | 2021-03-12 |
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