CN101672245B - Horizontal-shaft wind turbine with rotating cylinder at front edge of paddle - Google Patents
Horizontal-shaft wind turbine with rotating cylinder at front edge of paddle Download PDFInfo
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- CN101672245B CN101672245B CN2009101971331A CN200910197133A CN101672245B CN 101672245 B CN101672245 B CN 101672245B CN 2009101971331 A CN2009101971331 A CN 2009101971331A CN 200910197133 A CN200910197133 A CN 200910197133A CN 101672245 B CN101672245 B CN 101672245B
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- blade
- rotating cylindrical
- horizontal
- wind turbine
- bearing
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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
Abstract
The invention relates to a horizontal-shaft wind turbine with a rotating cylinder at the front edge of a paddle, which comprises a tower rack, a horizontal-shaft case, paddles and a hub or an air shield, wherein the tower rack is straightly arranged, the horizontal-shaft case is arranged at the top end of the tower rack, and the paddles and a hub or an air shield are arranged at the front end of the case. The front edge of each paddle is provided with a controllable cylinder which can forwardly or reversely rotate in the mode of winding the self axis, and the rotating cylinder and the paddle are in revolution together with a rotor in the case. The invention obtains the purpose of effectively using the wind power through regulating the rotating speed and the rotating direction of the rotating cylinder, controlling the flowing separation of air flow on the paddles and increasing the lift-drag ratio of the paddles of the wind turbine.
Description
Technical field
The present invention relates to a kind of wind energy conversion system, the horizontal-shaft wind turbine of marginal zone rotating cylindrical before particularly a kind of blade can improve the wind energy utilization of wind energy conversion system.
Technical background
At present, the aerofoil profile of horizontal-shaft wind turbine mainly is selected from the aviation aerofoil profile, in order to improve the efficient of blade absorbing wind energy, generally adopts the aerofoil profile of high lift-drag ratio, and blade is along highly making distortion.When wind energy conversion system rotating speed one regularly, along with the increase of wind speed, the angle of attack of air-flow on blade also increases thereupon, up to air-flow in blade surface generation flow separation, blade stall, the rapid drawdown of wind energy absorptivity, output power also reduces rapidly.Wind energy conversion system generally all has a cover control system to regulate output power and rotating speed, and feather wind energy conversion system manufacture cost is high, and the producer that makes change oar machine at present is yet less.Fixed pitch wind turbine adapts to change of wind velocity through the rotating speed of regulating wind energy conversion system, to improve lift, increases the absorptivity of wind energy.Under the restriction of the certain rotating speed of wind wheel, fixed pitch wind turbine is easier to occur stall with the increase of incoming flow wind speed.After the aerofoil profile of wind energy conversion system is selected, one timing of wind speed size, the also restriction to some extent of resistance ratios value that rises higher most of fixed pitch wind turbine aerofoil profile can not as much as possiblely capture wind energy.
Summary of the invention
The object of the invention is to propose to the problem of above-mentioned essence the horizontal-shaft wind turbine of marginal zone rotating cylindrical before a kind of blade, the wind energy utilization of raising wind energy conversion system.
In order to achieve the above object; Design of the present invention is: the aerofoil profile of preceding marginal zone rotating cylindrical can improve lift coefficient greatly and reduce resistance coefficient; Under the certain wind speed and the incoming flow angle of attack, increase the rotational speed of aerofoil profile leading edge cylinder, can control the flow separation of airfoil surface well; Improve it effectively and rise resistance ratio, see Fig. 4.Reference: V.J.MODI, MovingSurface Boundary-Layer Control (control of moving surface boundary layer).
Yet; Up to the present; The aerofoil profile of marginal zone rotating cylindrical all be in the flow field, to do translational motion before above-mentioned, if the aerofoil profile of this preceding marginal zone rotating cylindrical is applied on the horizontal-shaft wind turbine, that just can improve wind mill airfoil rises resistance ratio; The control air-flow is in the flow separation of blade surface, thus the absorption efficiency of increase wind energy.
According to the foregoing invention design, the present invention adopts following technical proposals:
The horizontal-shaft wind turbine of marginal zone rotating cylindrical before a kind of blade comprises pylon, the horizontal axis cabinet that is installed on the pylon top, the blade that is positioned at the cabinet front end and a wheel hub or an air guide sleeve of vertically installing.Described each blade leading edge is equipped with a controlled cylinder that rotates forward or backwards around self axis, and this rotating cylindrical revolves round the sun around the wind energy conversion system horizontal axis with the rotor in wheel hub or the cabinet with blade.
Above-mentioned rotating cylindrical diameter is 0.05～1.5 times of blade cross section aerofoil profile chord length, leaves the slit of about 0.0001～0.2 times of cylindrical cross-section diameter between blade and the rotating cylindrical.
Above-mentioned rotating cylindrical is rotated by the motoring that is installed on wheel hub or the cabinet internal rotor forward or backwards, periphery linear velocity U
CBe 0～10 times of incoming flow wind velocity U.
Above-mentioned blade is rotationally connected through several bearings and bearing housing and rotating cylindrical, guarantees that blade and rotating cylindrical remain in the original scope at the tangential relative position that reaches radially; Bearing housing and blade are connected, setting-in bearing between rotating cylindrical and the bearing housing.
Adopt 2～N bearing to be rotationally connected between above-mentioned rotating cylindrical and the blade, N is the natural number greater than 2, and bearing is selected deep groove ball bearing or angular contact ball bearing for use.
The present invention compared with prior art; Have following conspicuous substantive outstanding feature and significant advantage: the wind energy conversion system that the present invention proposes; In available wind speed range; Regulate the rotating speed of the rotating cylindrical of blade leading edge, that improves blade rises resistance ratio, effectively improves wind energy utilization; When wind speed was excessive, rotating cylindrical stopped operating or counterrotating, makes blade stall, reached the purpose of control wind energy conversion system power output, was equivalent to the effect that the feather wind energy conversion system changes the blade angle of attack.
Description of drawings
Fig. 1 is the structural representation of the horizontal-shaft wind turbine of marginal zone rotating cylindrical before the blade.
Fig. 2 is the structural representation that has the horizontal-shaft wind turbine of marginal zone rotating cylindrical before the middle-size and small-size blade of tail vane device for regulating direction.
Fig. 3 is the sectional drawing of one section blade of the horizontal-shaft wind turbine of marginal zone rotating cylindrical before the blade, (a) one section blade among the figure, and figure (b) is the A-A sectional drawing.
Fig. 4 is the streamline chart on aerofoil profile surface when certain incoming flow angle of attack (20 °) descends the rotating cylindrical different rotating speeds of preceding marginal zone rotating cylindrical.
Fig. 5 is a blade and the sectional drawing that is connected of rotating cylindrical, and (a) is outline drawing among the figure, and figure (b) is B-B place sectional drawing.
Fig. 6 is blade and rotating cylindrical joint schematic representation.
Fig. 7 is the schematic representation that is connected of wind energy conversion system propeller shank and rotor among Fig. 2.
Fig. 8 is wind energy conversion system propeller shank schematic representation and a propeller shank Bearing Installation sectional drawing among Fig. 1, and wherein figure (b) is a C-C place sectional drawing among the figure (a).
Fig. 9 is in available wind speed range, and blade leading edge rotating cylindrical is rotated in the forward and the airfoil surface air-flow adheres to schematic representation.
Figure 10 is when excessive wind speed, rotating cylindrical counterrotating of blade leading edge and airfoil surface stall schematic representation.
Embodiment
Embodiment one: referring to Fig. 1; The horizontal-shaft wind turbine of marginal zone rotating cylindrical before this blade; Comprise pylon 5, be installed in pylon 5 tops horizontal axis cabinet 4, be positioned at the wheel hub 3 of cabinet 4 front ends and be fixedly mounted on the blade 1 on the wheel hub 3; Each blade 1 leading edge is equipped with a controlled rotating cylindrical 2 around self axis forward or direction rotation, and this rotating cylindrical 2 with blade 1 with wheel hub 3 around the wind energy conversion system horizontal rotational shaft.
Embodiment two: referring to Fig. 2; The horizontal-shaft wind turbine of marginal zone rotating cylindrical before this blade; Comprise pylon 5, the horizontal axis cabinet 4 that is installed in pylon 5 tops, the foot piece 7 that is positioned at cabinet 4 rear portions and empennage 8, the blade 1 that is positioned at cabinet 4 front ends and an air guide sleeve 6 of vertically installing; Each blade 1 leading edge is equipped with a controlled rotating cylindrical 2 that rotates forward or backwards around self axis, and rotating cylindrical 2 with blade 1 with cabinet 4 rotors 14 around the wind energy conversion system horizontal rotational shaft.
In Fig. 1,2, leave certain slit δ between the rotating cylindrical 2 of blade 1 and its leading edge.About 1mm～the 2cm of δ looks wind energy conversion system size and decide, guarantees that rotating cylindrical 2 rotates around self axis with respect to blade 1 is independent, shown in the sectional drawing of segment section blade 1 among Fig. 3.Blade 1 is connected with cabinet 4 interior transmission shafts through wheel hub 3 with rotating cylindrical 2 among Fig. 1, and blade 1 root transition gradually is a cylinder, with the structural strength and the rigidity of increase and wheel hub 3 joints.In blade 1 root and wheel hub 3 joints, between rotating cylindrical 2 and the blade 1 bearing 9 is housed, as shown in Figure 8.Rotating cylindrical 2 is driven and can be rotated with certain speed forward or backwards by the motor in the wheel hub 3 15.Wind machine oar leaf 1 directly is connected with rotor 14 among Fig. 2, and each is driven each rotating cylindrical 2 forward or backwards by a motor 15 and rotate, and is as shown in Figure 7.The device for regulating direction that has foot piece 7 and empennage 8 compositions facings the wind wind energy conversion system.Wind machine oar leaf 1 is connected through bolt 11 with bearing housing 10 among Fig. 1,2; Setting-in bearing 9 between bearing housing 10 and the rotating cylindrical 2; Guarantee that rotating cylindrical 2 can be around the rotation of cylinder self axis when wind wheel rotates the horizontal axis revolution with blade 1; Guarantee wind energy conversion system simultaneously under various load actions, the gap delta between blade 1 and the rotating cylindrical 2 is constant, improves the integral rigidity of blade 1 and rotating cylindrical 2 simultaneously.Rotating cylindrical 2 can be a multidiameter shaft, also can make segmentation, is connected with set screw 13 through key 12 between every section axle, and is as shown in Figure 6.Blade 1 is terminal from the root to the blade tip with rotating cylindrical 2, whenever arranges that at a distance from a segment distance such one is connected with bearing housing 10 is formed by bearing 9, and is as shown in Figure 5.Less when wind speed, in the time of in wind speed range capable of using, motor 15 rotary driving cylinders 2 are rotated in the forward, and that improves blade rises resistance ratio, makes wind wheel absorbing wind energy effectively, as shown in Figure 9.Excessive when wind speed, during the generator overlond running, 2 counterrotatings of motor 15 rotary driving cylinders make blade 1 stall, and the power output of control wind energy conversion system is shown in figure 10.
Claims (3)
1. the horizontal-shaft wind turbine of marginal zone rotating cylindrical before the blade; Comprise pylon (5), the horizontal axis cabinet (4) that is installed on pylon (5) top, the blade (1) that is positioned at cabinet (4) front end and a wheel hub (3) or an air guide sleeve (6) of vertically installing; It is characterized in that described each blade (1) leading edge is equipped with a controlled cylindrical body (2) that rotates forward or backwards around self axis, and this rotating cylindrical (2) with blade (1) with the rotor (14) in wheel hub (3) or the cabinet (4) around the wind energy conversion system horizontal rotational shaft; Described blade (1) is rotationally connected with rotating cylindrical (2) through several bearings (9) and bearing housing (10), guarantees that blade (1) and rotating cylindrical (2) remain in the original scope at relative position tangential and radially; Bearing housing (10) is connected setting-in bearing (9) between rotating cylindrical (2) and the bearing housing (10) with blade (1); Adopt 2～N bearing (9) to be rotationally connected between described rotating cylindrical (2) and the blade (1), N is the natural number greater than 2, and described bearing (9) is selected deep groove ball bearing or angular contact ball bearing for use.
2. the horizontal-shaft wind turbine of marginal zone rotating cylindrical before the blade according to claim 1; It is characterized in that its diameter of described rotating cylindrical (2) is 0.05～1.5 times of blade (1) cross section aerofoil profile chord length, leaves the slit δ of 0.0001～0.2 times of cylinder (2) diameter of section between blade (1) and the rotating cylindrical (2).
3. the horizontal-shaft wind turbine of marginal zone rotating cylindrical body before the blade according to claim 1; It is characterized in that described rotating cylindrical (2) drives rotation forward or backwards, cylindrical body (2) linear resonance surface velocity U by the motor (15) that is installed on wheel hub (3) or cabinet (4) internal rotor (14)
CBe 0～10 times of incoming flow wind velocity U.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101971331A CN101672245B (en) | 2009-10-14 | 2009-10-14 | Horizontal-shaft wind turbine with rotating cylinder at front edge of paddle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101971331A CN101672245B (en) | 2009-10-14 | 2009-10-14 | Horizontal-shaft wind turbine with rotating cylinder at front edge of paddle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101672245A CN101672245A (en) | 2010-03-17 |
| CN101672245B true CN101672245B (en) | 2012-07-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101971331A Expired - Fee Related CN101672245B (en) | 2009-10-14 | 2009-10-14 | Horizontal-shaft wind turbine with rotating cylinder at front edge of paddle |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103016260B (en) * | 2012-11-26 | 2014-10-01 | 西安理工大学 | Front edge wing and cylindrical wing combined wind turbine blade |
| CN103062138A (en) * | 2013-01-15 | 2013-04-24 | 上海大学 | Flow separation control device |
| CN108266311A (en) * | 2018-01-16 | 2018-07-10 | 陈博涵 | A kind of wind power generation blade of power self-regulation |
| CN110094302B (en) * | 2019-01-11 | 2020-10-16 | 湘潭大学 | Variable-propeller top edge self-rotating vertical axis wind turbine |
| CN110242488A (en) * | 2019-06-25 | 2019-09-17 | 哈尔滨工程大学 | One kind being based on Magnus leading edge cylinder blade tide energy water conservancy generator |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB580053A (en) * | 1944-03-21 | 1946-08-26 | Henry Peirce Massey | Improvements in apparatus for increasing the magnus effect |
| CN2818834Y (en) * | 2005-08-31 | 2006-09-20 | 郑冠雄 | Wind-driven generator |
| JP2008106619A (en) * | 2006-10-23 | 2008-05-08 | Kansai Electric Power Co Inc:The | Composite magnus wing |
-
2009
- 2009-10-14 CN CN2009101971331A patent/CN101672245B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB580053A (en) * | 1944-03-21 | 1946-08-26 | Henry Peirce Massey | Improvements in apparatus for increasing the magnus effect |
| CN2818834Y (en) * | 2005-08-31 | 2006-09-20 | 郑冠雄 | Wind-driven generator |
| JP2008106619A (en) * | 2006-10-23 | 2008-05-08 | Kansai Electric Power Co Inc:The | Composite magnus wing |
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| Publication number | Publication date |
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| CN101672245A (en) | 2010-03-17 |
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