CN107013412B - Small vertical axis wind turbine with driven blades and power generation method thereof - Google Patents
Small vertical axis wind turbine with driven blades and power generation method thereof Download PDFInfo
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- CN107013412B CN107013412B CN201710294687.8A CN201710294687A CN107013412B CN 107013412 B CN107013412 B CN 107013412B CN 201710294687 A CN201710294687 A CN 201710294687A CN 107013412 B CN107013412 B CN 107013412B
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- blades
- blade
- generator
- hub
- blade mounting
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- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000010248 power generation Methods 0.000 title abstract description 11
- 230000005611 electricity Effects 0.000 claims description 6
- 230000003247 decreasing effect Effects 0.000 claims description 3
- 230000003068 static effect Effects 0.000 claims description 2
- 238000009434 installation Methods 0.000 description 4
- 238000005452 bending Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
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
- F03D3/00—Wind motors with rotation axis substantially perpendicular to the air flow entering the rotor
- F03D3/06—Rotors
- F03D3/062—Rotors characterised by their construction elements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
- F03D7/06—Controlling wind motors the wind motors having rotation axis substantially perpendicular to the air flow entering the rotor
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/74—Wind turbines with rotation axis perpendicular to the wind direction
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- 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)
- Wind Motors (AREA)
Abstract
The invention discloses a small vertical axis wind turbine driving blades and a power generation method thereof. The resistance of the blades greatly reduces the efficiency of the wind power generator. Two spokes on the same side of the invention are respectively fixed with two ends of a blade mounting shaft, and the blade mounting shaft and the blade form a revolute pair; the axis of the blade mounting shaft divides the blade into two parts with unequal chord lengths; the inner sides of the two blade mounting shafts are respectively fixed with a baffle rod; the baffle rod comprises a first cross rod, a vertical rod, a second cross rod and a baffle ring; the baffle ring is fixed at the bottom end of the second cross rod; the included angles between the second cross rod and the spoke are 5-10 degrees, and the baffle rings of the two baffle rods face opposite directions; the upper hub is supported on the rotor of the generator and is connected to the rotor of the generator by a clutch. According to the invention, the blades are divided into unequal parts by the blade mounting shaft so as to force the blades to deflect, the stop lever controls the deflection angle of the blades to achieve the optimal windward area, and the efficiency of the generator is improved.
Description
Technical Field
The invention relates to a wind driven generator, in particular to a small vertical axis wind driven generator driving blades and a power generation method thereof.
Background
The wind driven generator mainly comprises a horizontal shaft and a vertical shaft. The horizontal axis wind turbine is suitable for being arranged in a field wind field with relatively stable wind direction and wind speed, is not suitable for being arranged in a city with relatively frequent wind speed and wind direction change, and the vertical axis wind turbine, in particular the H-shaped vertical axis wind turbine, can be well adapted to the characteristics of urban wind conditions. The vertical axis wind turbine is off-grid wind power generation equipment and is mainly applied to small-sized electricity utilization places such as urban street lamps, LED display boards, electroless users in remote mountainous areas and the like. The traditional H-shaped generator mainly improves the power generation efficiency in aspects of blade shape and stability. The generator is usually arranged at the top of the upright post, the impeller which horizontally rotates is arranged on the rotor shaft of the generator, the impeller is connected with the rotor shaft of the generator into a whole above the generator, and the impeller drives the generator rotor to rotate under the action of wind to generate electric energy. But normally the resistance of the blades greatly reduces the efficiency of the wind power generator.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the small vertical axis wind turbine with the blades driven and the power generation method thereof, which have the advantages of simple structure, good flexibility, safety, reliability, small vibration, low starting wind speed and high power generation efficiency.
In order to achieve the above object, the technical scheme of the present invention is implemented as follows:
the invention relates to a small vertical axis wind turbine driving blades, which comprises a generator, blades, an impeller hub, a stop lever and a blade mounting shaft, wherein the stop lever is arranged on the generator; the impeller hub comprises an upper hub, spokes, a lower hub and a connecting rod; the upper hub and the lower hub are connected into a whole through the connecting rod, two spokes are symmetrically fixed on the upper hub and the lower hub, two spokes on the same side of the upper hub and the lower hub are respectively fixed with two ends of a blade mounting shaft, and each blade mounting shaft and one blade form a revolute pair; the axis of the blade mounting shaft divides the blade into two parts with unequal chord lengths; the inner sides of the two blade mounting shafts are respectively fixed with a baffle rod; the baffle rod comprises a first cross rod, a vertical rod, a second cross rod and a baffle ring; the first cross rod is fixed with the blade mounting shaft, the vertical rod is connected with the first cross rod and the second cross rod, and the baffle ring is fixed at the bottom end of the second cross rod; the inner concave surface of the baffle ring is contacted with the outer convex surface of the part with the larger chord length of the blade, or the outer convex surface of the baffle ring is contacted with the outer convex surface of the part with the smaller chord length of the blade; the included angles between the second cross rod and the spoke are 5-10 degrees, and the baffle rings of the two baffle rods face opposite directions; the lower hub is fixed with the top end of the thrust bearing, and the bottom end of the thrust bearing is fixed on the upright post; the upper hub is supported on the rotor of the generator through a ball bearing; one end of the clutch is fixed on the upper hub, and the other end of the clutch is fixed with a rotor of the generator; the base of the generator is connected with the top end of the upright post through an upper flange.
The axis of the blade mounting shaft divides the blade into the chord length ratio of 1: 2.
Elastic pieces are arranged on the inner concave surface and the outer concave surface of the baffle ring.
The bottom end of the upright post is provided with a lower flange.
And a brake device is arranged between the upright post and the lower hub.
The power generation method of the small vertical axis wind turbine with the driven blades comprises the following steps:
when wind force acts on the blades, because the blade mounting shaft is not positioned at the center of the blades, the larger chord length part of the blades can deflect due to larger force, at the moment, the larger chord length part of one blade is supported by the stop lever, the stop lever prevents the windward side from decreasing, and meanwhile, the other blade reaches the balance position when the effective area on the plane vertical to the wind direction is minimum due to the fact that the resistance surface is under the action of wind force, resistance is reduced, two blades with asymmetric positions drive the impeller hub to rotate, and when the rotation speed of the impeller hub reaches a preset value, the clutch is combined, so that the rotor of the generator is driven to rotate to generate electricity.
The invention utilizes the characteristics of the influence of wind force on the area of the blade on the loss of resistance and the unbalance of force, the blade is divided into non-equal parts by the blade mounting shaft so as to force the blade to deflect, the deflection angle of the blade is controlled under the auxiliary effect of the stop lever so as to achieve the optimal windward area, reduce the resistance loss and improve the efficiency of the generator. The rotation of the moving blade can continuously adapt to the wind direction, and has universality under the actual working condition. Because the vertical axis wind driven generator is small, the structure is simple, the cost is low, the installation and the maintenance are convenient, the town street lamp, the LED display screen and the remote area have universality, and the popularization is easy.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
fig. 2 is a schematic view of the invention with two blades swinging into a steady state against the wind.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1 and 2, a small vertical axis wind turbine with blades comprises a generator 4, blades 11, an impeller hub, a stop lever 15 and a blade mounting shaft 16; the impeller hub comprises an upper hub 1, spokes 14, a lower hub 7 and a connecting rod 12; the connecting rod 12 connects the upper hub 1 and the lower hub 7 into a whole, two spokes 14 are symmetrically fixed on the upper hub 1 and the lower hub 7, two spokes on the same side of the upper hub 1 and the lower hub 7 are respectively fixed with two ends of a blade mounting shaft 16, and each blade mounting shaft 16 and one blade 11 form a revolute pair; the blade mounting shaft 16 axis divides the blade 11 into a chord ratio of 1:2, two parts; a baffle rod 15 is fixed on the inner sides of the two blade mounting shafts 16; the baffle rod comprises a first cross rod, a vertical rod, a second cross rod and a baffle ring; the first cross rod is fixed with the blade mounting shaft 16, the vertical rod is connected with the first cross rod and the second cross rod, and the baffle ring is fixed at the bottom end of the second cross rod; when the blades rotate to a stable state, the inner concave surface of the baffle ring is contacted with the outer convex surface of the larger part of the chord length of the blades, or the outer convex surface of the baffle ring is contacted with the outer convex surface of the smaller part of the chord length of the blades; the included angles between the second cross rod and the spoke are 5-10 degrees, and the baffle rings of the two baffle rods face opposite directions; the stop lever is arranged on the blade mounting shaft and used for controlling the swing amplitude of the blade and maintaining the swing amplitude at a proper angle; elastic pieces are arranged on the inner concave surface and the outer concave surface of the baffle ring, and impact force of the blade and the stop lever is buffered; the lower hub 7 is fixed with the top end of the thrust bearing 8, and the bottom end of the thrust bearing 8 is fixed on the upright post 6; the bottom end of the upright post 6 is provided with a lower flange 10; the upper hub 1 is supported on the rotor 3 of the generator 4 by means of ball bearings 13; one end of the clutch 2 is fixed on the upper hub 1, and the other end is fixed with the rotor 3 of the generator; the base of the generator 4 is connected with the top end of the upright post 6 through an upper flange 5 to form a static part of the small vertical axis wind turbine; the blade 11, the blade mounting shaft 16, the impeller hub, the clutch 2 and the rotor 3 of the generator 4 form a rotating part of the small vertical axis wind driven generator, the blade 11 and the impeller hub start to rotate under the action of wind force, after the rotation speed of the impeller hub reaches a rated value, the clutch 2 is combined, the rotor 3 of the generator rotates along with the impeller hub, the generator 4 starts to generate electricity, a brake device 9 is arranged between the stand column 6 and the lower hub 7, when the rotation speed of the impeller hub exceeds a set value, the brake function of the brake device 9 is started, and the rotation speed is reduced to ensure safety. The installation position of the blade and the axial center position of the blade installation shaft can be installed according to actual conditions, and the position of the stop lever is determined according to the blade installation shaft and the blade swing angle.
The power generation method of the small vertical axis wind turbine with the driven blades comprises the following steps:
when wind force acts on the blades, because the blade mounting shaft is not positioned at the center of the blades, the larger chord length part of the blades can deflect due to larger force, at the moment, the larger chord length part of one blade is supported by the stop lever, the stop lever prevents the windward side from decreasing, and meanwhile, the other blade reaches the balance position when the effective area on the plane vertical to the wind direction is minimum due to the resistance surface under the action of wind force, so that the resistance is reduced, the two blades 11 with asymmetric positions drive the impeller hub to rotate, and when the rotation speed of the impeller hub reaches a preset value (which can be set according to the rated power of the generator), the clutch 2 is combined, so that the rotor 3 of the generator 4 is driven to rotate to generate electricity. The two blades 11 with asymmetric positions and the bending of the blades can more effectively convert wind energy into kinetic energy for blade rotation, and the bending can enable the effective projection area of the resistance surface to be minimum, so that the power generation efficiency is improved.
Claims (6)
1. A small vertical axis wind turbine driving blades comprises a generator, blades, an impeller hub, a stop lever and a blade mounting shaft; the method is characterized in that: the impeller hub comprises an upper hub, spokes, a lower hub and a connecting rod; the upper hub and the lower hub are connected into a whole through the connecting rod, two spokes are symmetrically fixed on the upper hub and the lower hub, two spokes on the same side of the upper hub and the lower hub are respectively fixed with two ends of a blade mounting shaft, and each blade mounting shaft and one blade form a revolute pair; the axis of the blade mounting shaft divides the blade into two parts with unequal chord lengths; the inner sides of the two blade mounting shafts are respectively fixed with a baffle rod; the baffle rod comprises a first cross rod, a vertical rod, a second cross rod and a baffle ring; the first cross rod is fixed with the blade mounting shaft, the vertical rod is connected with the first cross rod and the second cross rod, and the baffle ring is fixed at the bottom end of the second cross rod; the inner concave surface of the baffle ring is contacted with the outer convex surface of the part with the larger chord length of the blade, or the outer convex surface of the baffle ring is contacted with the outer convex surface of the part with the smaller chord length of the blade; the included angles between the second cross rod and the spoke are 5-10 degrees, and the baffle rings of the two baffle rods face opposite directions; the lower hub is fixed with the top end of the thrust bearing, and the bottom end of the thrust bearing is fixed on the upright post; the upper hub is supported on the rotor of the generator through a ball bearing; one end of the clutch is fixed on the upper hub, and the other end of the clutch is fixed with a rotor of the generator; the base of the generator is connected with the top end of the upright post through an upper flange to form a static part of the small vertical axis wind turbine; the blades, the blade mounting shaft, the impeller hub, the clutch and the rotor of the generator form a rotating part of the small vertical axis wind driven generator, the blades and the impeller hub start to rotate under the action of wind force, the clutch is combined after the rotating speed of the impeller hub reaches a rated value, the rotor of the generator rotates along with the impeller hub, and the generator starts to generate electricity.
2. A small vertical axis wind turbine with blades as claimed in claim 1 wherein: the axis of the blade mounting shaft divides the blade into the chord length ratio of 1: 2.
3. A small vertical axis wind turbine with blades as claimed in claim 1 wherein: elastic pieces are arranged on the inner concave surface and the outer concave surface of the baffle ring.
4. A small vertical axis wind turbine with blades as claimed in claim 1 wherein: the bottom end of the upright post is provided with a lower flange.
5. A small vertical axis wind turbine with blades as claimed in claim 1 wherein: and a brake device is arranged between the upright post and the lower hub.
6. The method for generating power by a small vertical axis wind turbine with blades according to claim 1, wherein: the method comprises the following steps:
when wind force acts on the blades, because the blade mounting shaft is not positioned at the center of the blades, the larger chord length part of the blades can deflect due to larger force, at the moment, the larger chord length part of one blade is supported by the stop lever, the stop lever prevents the windward side from decreasing, and meanwhile, the other blade reaches the balance position when the effective area on the plane vertical to the wind direction is minimum due to the fact that the resistance surface is under the action of wind force, resistance is reduced, two blades with asymmetric positions drive the impeller hub to rotate, and when the rotation speed of the impeller hub reaches a preset value, the clutch is combined, so that the rotor of the generator is driven to rotate to generate electricity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710294687.8A CN107013412B (en) | 2017-04-28 | 2017-04-28 | Small vertical axis wind turbine with driven blades and power generation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710294687.8A CN107013412B (en) | 2017-04-28 | 2017-04-28 | Small vertical axis wind turbine with driven blades and power generation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107013412A CN107013412A (en) | 2017-08-04 |
| CN107013412B true CN107013412B (en) | 2023-08-08 |
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ID=59447272
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710294687.8A Active CN107013412B (en) | 2017-04-28 | 2017-04-28 | Small vertical axis wind turbine with driven blades and power generation method thereof |
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| Country | Link |
|---|---|
| CN (1) | CN107013412B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI772878B (en) * | 2020-09-07 | 2022-08-01 | 洪紳勝 | Vertical-axis wind turbine with automatic control of blade pitch angle |
| CN112610421A (en) * | 2020-12-21 | 2021-04-06 | 赖艳华 | Auxiliary device for safety in use of household wind driven generator |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006037939A (en) * | 2004-07-28 | 2006-02-09 | Takeshi Mitsui | Wind-power generation system |
| CN201314277Y (en) * | 2008-11-28 | 2009-09-23 | 欧振玉 | Wind power generating device with vertical shaft |
| JP2013245564A (en) * | 2012-05-23 | 2013-12-09 | Ritsumeikan | Blade for vertical axial wind turbine and vertical axial wind turbine |
| CN103541864A (en) * | 2012-07-13 | 2014-01-29 | 胡德诚 | Small vertical-axis wind turbine |
| CN103982381A (en) * | 2014-06-07 | 2014-08-13 | 华电重工机械有限公司 | Wind power tower |
| JP2014156838A (en) * | 2013-02-18 | 2014-08-28 | Takanori Tsuchiya | Wind power generator |
| CN206830376U (en) * | 2017-04-28 | 2018-01-02 | 浙江理工大学 | A kind of small-size vertical axis wind turbine with movable vane piece |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7550865B2 (en) * | 2006-06-27 | 2009-06-23 | Jonsson Stanley C | Wind turbine having variable pitch airfoils that close when moving against the direction of the wind |
| US9752557B2 (en) * | 2015-01-30 | 2017-09-05 | John Nicklas | Vertical axis turbine |
-
2017
- 2017-04-28 CN CN201710294687.8A patent/CN107013412B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006037939A (en) * | 2004-07-28 | 2006-02-09 | Takeshi Mitsui | Wind-power generation system |
| CN201314277Y (en) * | 2008-11-28 | 2009-09-23 | 欧振玉 | Wind power generating device with vertical shaft |
| JP2013245564A (en) * | 2012-05-23 | 2013-12-09 | Ritsumeikan | Blade for vertical axial wind turbine and vertical axial wind turbine |
| CN103541864A (en) * | 2012-07-13 | 2014-01-29 | 胡德诚 | Small vertical-axis wind turbine |
| JP2014156838A (en) * | 2013-02-18 | 2014-08-28 | Takanori Tsuchiya | Wind power generator |
| CN103982381A (en) * | 2014-06-07 | 2014-08-13 | 华电重工机械有限公司 | Wind power tower |
| CN206830376U (en) * | 2017-04-28 | 2018-01-02 | 浙江理工大学 | A kind of small-size vertical axis wind turbine with movable vane piece |
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| Publication number | Publication date |
|---|---|
| CN107013412A (en) | 2017-08-04 |
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Effective date of registration: 20230713 Address after: 509 Kangrui Times Square, Keyuan Business Building, 39 Huarong Road, Gaofeng Community, Dalang Street, Longhua District, Shenzhen, Guangdong Province, 518000 Applicant after: Shenzhen lizhuan Technology Transfer Center Co.,Ltd. Address before: 310018 No. 2 street, Xiasha Higher Education Park, Hangzhou, Zhejiang, 928 Applicant before: ZHEJIANG SCI-TECH University Effective date of registration: 20230713 Address after: 242300 No.17, Qinghua East Road, Ningguo City, Xuancheng City, Anhui Province Applicant after: STATE GRID ANHUI ELECTRIC POWER CO., LTD., NINGGUO POWER SUPPLY Co. Address before: 509 Kangrui Times Square, Keyuan Business Building, 39 Huarong Road, Gaofeng Community, Dalang Street, Longhua District, Shenzhen, Guangdong Province, 518000 Applicant before: Shenzhen lizhuan Technology Transfer Center Co.,Ltd. |
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