CN104018985B - Flexible and retractable auxiliary blade mechanism of vertical-axis wind turbine - Google Patents

Flexible and retractable auxiliary blade mechanism of vertical-axis wind turbine Download PDF

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Publication number
CN104018985B
CN104018985B CN201410259101.0A CN201410259101A CN104018985B CN 104018985 B CN104018985 B CN 104018985B CN 201410259101 A CN201410259101 A CN 201410259101A CN 104018985 B CN104018985 B CN 104018985B
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auxiliary blade
reel
flexible
fixedly mounted
back blades
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CN104018985A (en
Inventor
李岩
和庆斌
吴志诚
白音巴特尔
白荣彬
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Northeast Agricultural University
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Northeast Agricultural University
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/70Wind energy
    • Y02E10/74Wind turbines with rotation axis perpendicular to the wind direction

Abstract

The invention discloses a flexible and retractable auxiliary blade mechanism of a vertical-axis wind turbine and belongs to wind turbines. According to the flexible and retractable auxiliary blade mechanism of the vertical-axis wind turbine, an auxiliary blade is assembled on an upper beam and a lower beam of the vertical-axis wind turbine and located between a main blade and a main shaft, a flexible auxiliary blade provided with a rigid balance weight bar is connected to the auxiliary blade through a coiling block, a dead bolt, a torsion spring, a bearing sleeve, a bearing and a fixed shaft are assembled in the coiling block, the fixed shaft is fixedly installed on the upper beam and the lower beam, a reel and a planar volute spiral spring are assembled on the upper beam and the lower beam, the two ends of a stay cord are connected to the rigid balance weight bar and the reel, and then the flexible and retractable auxiliary blade mechanism is formed. The flexible and retractable auxiliary blade mechanism is novel in structural design, scientific and reasonable in utilization of wind energy, high in adaptability, reliable in use and high in automation degree.

Description

Vertical axis windmill flexible expandable auxiliary blade mechanism
Technical field
The invention belongs to wind energy conversion system, relate to a kind of flexible expandable auxiliary blade mechanism being assemblied on vertical axis windmill.
Background technology
Vertical axis windmill can be divided into resistance-type and lift-type two kinds with its operation principle.Wherein, Savnious wind energy conversion system and Darrieus wind energy conversion system It is respectively resistance-type and the Typical Representative of lift-type wind energy conversion system.Shaft resistance type windmill startability is good, but under high tip-speed ratio, wind energy utilization efficiency is relatively low, Lift-type wind energy conversion system wind energy utilization efficiency under high tip-speed ratio is higher, but startability is poor, especially self-starting relatively difficult to achieve under low wind friction velocity.For Solving the contradiction between vertical axis windmill startability and wind energy utilization efficiency, it is studied by numerous studies person.
For improving the starting characteristic of lift-type wind energy conversion system, mainly there are two kinds of typical methods.The first is directly to be combined with resistance-type by lift-type, profit The feature of high torque can be produced under low tip-speed ratio, it is achieved the startup of lift-type wind energy conversion system with resistance wind wheel.Such as utility model patent " 200920261028.5 liter drag force hybrid vertical axis wind turbine ";The second is to change blade construction, uses solid blade of living to increase lift-type wind-force The startability of machine.As 200580010262.5 " vertical shaft windmill machine windmill blades ", 201210011801.9 " a kind of vertical axis windmill '. But the most all there are some problems in both approaches.
Although first method effectively improves the auto-startup characteristic of wind energy conversion system, but along with the increase of tip-speed ratio, resistance wind wheel is gradually converted into wind energy conversion system Load, and then reduce complete machine wind energy utilization efficiency in a rated operation.Second method compares with first method, it is achieved form is not With, but principle is and does work at collateral resistance with the wind, side lift acting against the wind.The method needs solid blade alive to complete once in each swing circle Folding, this makes the vibrations of wind energy conversion system increase, and the turbulent phenomenon aggravation between fixing blade and moving vane, is degrading the force environment of blade, carries High to blade height and the requirement of intensity, practicality is the strongest.
Summary of the invention
It is an object of the invention to improve wind energy utilization efficiency under shaft resistance type windmill height rotating speed low, the problem of lift-type wind energy conversion system startability difference.There is provided A kind of rise, hinder compound vertical axis windmill flexible expandable auxiliary blade mechanism.
The present invention is achieved by the following technical solutions:
Vertical axis windmill flexible expandable auxiliary blade mechanism, is fixedly mounted with upper flange and lower flange, at described upper flange on main shaft the most successively Be fixedly mounted with entablature and sill on lower flange respectively, the outer end of upper and lower crossbeam is fixedly mounted with primary blades respectively, at described upper and lower beam sides Above, between primary blades and main shaft, equipped back blades is fixed at position, stands to offering cylindrical hole at the maximum gauge position of back blades, and reel can It is inserted into rotationally in the cylindrical hole of back blades, the upper and lower sidepiece in reel barrel dliameter is fixedly mounted with gim peg and bearing holder (housing, cover) the most successively, is fixedly mounted with bearing Fixing axle insert on the position, both sides being packed in lower and upper cross-member respectively, described fixing axle inserting is at bearing holder (housing, cover) and reel intracavity, described bearing and bearing Set is fixedly mounted with cooperation;Torque spring is sleeved on fixing axle, and the both ends of described torque spring are affixed with gim peg and fixing axle respectively, described accessory lobes Along standing to being provided with strip through-hole on sheet sidewall, the one end of flexible auxiliary blade is connected with reel, in described flexibility by the strip through-hole on back blades Rigidity counter weight strip it is fixedly mounted with, the upper and lower end portion of the described rigidity counter weight strip inserting spacing cunning on upper and lower crossbeam respectively on the other end of auxiliary blade In groove, being rotatably mounted reel respectively in entablature part corresponding with sill, the two ends of plane scroll spring are connected to entablature Or on sill and reel, bracing wire two ends are connected on rigidity counter weight strip and reel, described flexible auxiliary blade and back blades centreline space Angle α is 45 °~75 °, and the quantity of described flexible auxiliary blade is 2~6.
Present invention have an advantage that the present invention at the low rotational speed, flexible auxiliary blade stretches, and the resistance wind wheel constituted with back blades provides for wind energy conversion system Bigger driving moment, drives wind energy conversion system to accelerate;At high speed, flexible auxiliary blade is retracted, and back blades regains one's integrity, and provides one for wind energy conversion system Fixed driving moment.Present invention reduces the threshold wind velocity of wind energy conversion system, add wind energy conversion system toggle speed, improve the wind energy under high tip-speed ratio simultaneously Utilization ratio, has that novel in structural design, Wind Power Utilization are scientific and reasonable, adaptable, use the feature reliable, automaticity is high, application Have a extensive future.
Accompanying drawing explanation
Fig. 1 is vertical axis windmill flexible expandable auxiliary blade mechanism population structure schematic three dimensional views;
Fig. 2 is flexible auxiliary blade telescoping mechanism schematic diagram;
Fig. 3 is the direction view of bowing of Fig. 2.
Label declaration in figure: 1, main shaft, 2, sill, 3, lower flange, 4, upper flange, 5, entablature, 6, primary blades, 7, back blades, 8, flexible auxiliary blade, 9, rigidity counter weight strip, 10, limit sliding chutes, 11, bracing wire, 12, reel, 13, reel, 14, gim peg, 15, Torque spring, 16, bearing holder (housing, cover), 17, bearing, 18, fixing axle, 19, plane scroll spring.
Detailed description of the invention
A kind of vertical axis windmill flexible expandable auxiliary blade mechanism, is fixedly mounted with upper flange 4 and lower flange 3 on main shaft 1 the most successively, It is fixedly mounted with entablature 5 and sill 2 on described upper flange 4 and lower flange 3 respectively, the outer end of upper and lower crossbeam 5,2 is fixedly mounted with primary blades respectively 6, the fixing equipped back blades 7 in position on described upper and lower crossbeam 5,2 sidepiece, between primary blades 6 and main shaft 1, at back blades 7 Maximum gauge position is stood to offering cylindrical hole, and reel 13 is inserted in the cylindrical hole of back blades 7 rotationally, in reel 13 barrel dliameter upper, It is fixedly mounted with gim peg 14 and bearing holder (housing, cover) 16 on following side the most successively, is fixedly mounted with the fixing axle 18 of bearing 17 and inserts respectively and be packed in lower and upper cross-member 5,2 On position, both sides, the inserting of described fixing axle 18 is at bearing holder (housing, cover) 16 and reel 13 intracavity, and described bearing 17 is fixedly mounted with bearing holder (housing, cover) 16 and coordinates;Torsion Spring 15 is sleeved on fixing axle 18, and the both ends of described torque spring 15 are affixed with gim peg 14 and fixing axle 18 respectively, described accessory lobes Along standing to being provided with strip through-hole on sheet 7 sidewall, the one end of flexible auxiliary blade 8 is connected with reel 13 by the strip through-hole on back blades 7, The other end of described flexible auxiliary blade 8 is fixedly mounted with rigidity counter weight strip 9, the inserting respectively of the upper and lower end portion of described rigidity counter weight strip 9 upper, In limit sliding chutes 10 on sill 5,2, entablature 5 and the corresponding part of sill 2 are rotatably mounted reel 12, plane respectively The two ends of scroll spring 19 are connected on entablature 5 or sill 2 and reel 12, and bracing wire 11 two ends are connected to rigidity counter weight strip 9 With on reel 12, described flexible auxiliary blade 8 is 45 °~75 ° with back blades 7 centreline space angle α, described flexible auxiliary blade 8 Quantity is 2~6.
In an initial condition, plane scroll spring 19 and torque spring 15 apply certain pretightning force to wind energy conversion system, and flexible auxiliary blade 8 is at two ends pretension Under the effect of power, flexible auxiliary blade 8 is in initial rest position, under this state, inside primary blades 6, by back blades 7 and flexible auxiliary lobe Sheet 8 constitutes triangle resistance blade, can be equivalent to a resistance wind wheel.Wind energy conversion system is under rotation status, and rigidity counter weight strip 9 produces certain being centrifuged Power, the active force that the active force that torque spring 15 produces produces more than plane scroll spring 19 with centrifugal force sum, rigidity counter weight strip 9 is auxiliary with flexibility Blade 8 is helped to move along limit sliding chutes 10 together, until reaching new balance.
When rotating speed is relatively low, centrifugal force is less, and flexible auxiliary blade 8 is substantially at deployed condition, and district's triangle resistance blade produces bigger driving with the wind Kinetic moment, meanwhile, adverse wind zone triangle resistance blade produces less resistance torque, so that wind energy conversion system realizes self-starting under the lowest wind speed.Along with The increase of rotating speed, the centrifugal force that rigidity counter weight strip 9 produces also is gradually increased, and flexible auxiliary blade 8 gradually tapers up, when rotating speed increases to certain numerical value Time, flexible auxiliary blade 8 is entirely retracted in back blades 7, is combined into a complete blade with back blades 7, and now the driving moment of wind energy conversion system is main The lift produced by the primary blades 6 of outer layer provides, and completes to be provided driving force by resistance under the slow-speed of revolution, is provided the conversion of driving force under high rotating speed by lift. The most at high speed, internal layer back blades 7 also provides for certain driving force, improves the wind energy utilization efficiency under wind energy conversion system height rotating speed.
Under original state, by torque spring 15 and plane scroll spring 19 apply different pretightning forces, and the rigidity of different quality is selected to join Weight bar 9, can control rigidity counter weight strip 9 and be entirely retracted to the wind energy conversion system rotating speed of back blades 7, and telescoping mechanism is to being entirely retracted to from starting to shrink to Rotating speed interval, to play blade optimum pneumatic performance, it is thus achieved that higher wind energy utilization efficiency.
Serviceability of the present invention is:
1, vertical axis windmill internal layer back blades 7 of the present invention and flexible auxiliary blade 8 are arranged between upper and lower crossbeam 5,2, do not have volume The volume of outer increase wind energy conversion system.
2, in the present invention, rigidity counter weight strip 9 moves in limit sliding chutes 10, defines that under the angle of flexible auxiliary blade 8 and each rotating speed, rigidity is joined The position of weight bar 9, reduce that flexible auxiliary blade 8 produces because of stress in wind energy conversion system rotates trembles, it is ensured that wind-force turning to driving moment Change.
3, reel 13 is arranged at the maximum gauge of back blades 7, does not destroy the integrity of back blades 7 aerofoil profile, also carries for telescopic mounting simultaneously Enough work spaces are supplied.
4, after rigidity counter weight strip 9 shrinks completely, it is combined into an intact leaf with back blades 7, thus ensure that at high speed, back blades 7 Normal aeroperformance, rigidity counter weight strip 9 embeds in back blades 7, it is ensured that the safety that rated operation apparatus for lower wind machine runs.
5, in the present invention, by joining torque spring 15, the regulation of plane scroll spring 19 pretightning force size and different quality rigidity counter weight strip 9 Put, it is possible to achieve the stable transition that wind energy conversion system operates to high tip-speed ratio from low tip-speed ratio, it is achieved that vertical suction draught machine self-starting, improve height simultaneously Wind energy utilization efficiency under tip-speed ratio.

Claims (3)

1. a vertical axis windmill flexible expandable auxiliary blade mechanism, is fixedly mounted with upper method on main shaft (1) the most successively Blue (4) and lower flange (3), be fixedly mounted with entablature (5) and lower horizontal stroke on described upper flange (4) and lower flange (3) respectively Beam (2), is fixedly mounted with primary blades (6) on the outer end of upper and lower crossbeam (5,2) respectively, it is characterised in that: described On upper and lower crossbeam (5,2) sidepiece, it is positioned at the fixing equipped back blades in position between primary blades (6) and main shaft (1) (7), standing at the maximum gauge position of back blades (7) to offering cylindrical hole, reel (13) is inserted into pair rotationally In the cylindrical hole of blade (7), the upper lateral part in reel (13) barrel dliameter is fixedly mounted with gim peg (14), in reel (13) Be fixedly mounted with bearing holder (housing, cover) (16) in barrel dliameter inner underside portion, be fixedly mounted with the fixing axle (18) of bearing (17) insert respectively be packed in, On the position, both sides of sill (5,2), the inserting of described fixing axle (18) at bearing holder (housing, cover) (16) and reel (13) intracavity, Described bearing (17) is fixedly mounted with bearing holder (housing, cover) (16) and coordinates;Torque spring (15) is sleeved on fixing axle (18), described The both ends of torque spring (15) are affixed with gim peg (14) and fixing axle (18) respectively, in described back blades (7) side Along standing to being provided with strip through-hole on wall, the one end of flexible auxiliary blade (8) by the strip through-hole on back blades (7) with Reel (13) connects, and is fixedly mounted with rigidity counter weight strip (9) on the other end of described flexible auxiliary blade (8), described just Property counter weight strip (9) upper and lower end portion respectively inserting limit sliding chutes (10) on upper and lower crossbeam (5,2) in, upper Reel (12), plane scroll spring it is rotatably mounted respectively on crossbeam (5) and sill (2) corresponding part (19) two ends are connected on entablature (5) or sill (2) and reel (12), bracing wire (11) two ends It is connected on rigidity counter weight strip (9) and reel (12).
Vertical axis windmill the most according to claim 1 flexible expandable auxiliary blade mechanism, it is characterised in that: described Flexible auxiliary blade (8) is 45 °~75 ° with back blades (7) centreline space angle α.
Vertical axis windmill the most according to claim 1 flexible expandable auxiliary blade mechanism, it is characterised in that: described The quantity of flexible auxiliary blade (8) is 2~6.
CN201410259101.0A 2014-06-06 2014-06-06 Flexible and retractable auxiliary blade mechanism of vertical-axis wind turbine Active CN104018985B (en)

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CN105201743B (en) * 2015-11-03 2017-11-07 杭州恒龙新能源科技有限公司 Speed limiting mechanism
CN110094302B (en) * 2019-01-11 2020-10-16 湘潭大学 Variable-propeller top edge self-rotating vertical axis wind turbine
CN110374797B (en) * 2019-08-13 2020-06-02 杭州德飙新能源科技有限公司 Self-adjusting type wind driven generator blade
CN110360052A (en) * 2019-08-28 2019-10-22 上海海事大学 A kind of vertical axis windmill of angle of attack adjust automatically
CN111075642B (en) * 2019-12-31 2021-04-09 国家电投集团江西吉安新能源有限公司 Stable-balance vertical wind power generation device and method thereof
CN113898527B (en) * 2021-10-13 2023-12-01 南京师范大学中北学院 Wing arm telescopic vertical axis wind turbine capable of automatically adjusting mass center
CN115342023B (en) * 2022-09-13 2023-06-23 中国长江三峡集团有限公司 Impeller structure and wind power generation device

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JP2005248935A (en) * 2004-03-03 2005-09-15 Haruo Fujiwara Windmill for wind power generation
CN201757026U (en) * 2010-03-08 2011-03-09 王德恒 Split type vertical shaft wind generator system
CN101915218B (en) * 2010-08-20 2012-05-02 张�杰 Wind power generating set with vertical shaft
GB201114677D0 (en) * 2011-08-25 2011-10-12 Brown Donald E Fluid flow capture & drive transfer

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