CN201763523U - Front area-adjustable wind turbine blades - Google Patents

Front area-adjustable wind turbine blades Download PDF

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Publication number
CN201763523U
CN201763523U CN2010205157694U CN201020515769U CN201763523U CN 201763523 U CN201763523 U CN 201763523U CN 2010205157694 U CN2010205157694 U CN 2010205157694U CN 201020515769 U CN201020515769 U CN 201020515769U CN 201763523 U CN201763523 U CN 201763523U
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blade
wind
petiole
exhibits
pneumatic equipment
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CN2010205157694U
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Chinese (zh)
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许盟来
许士泉
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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

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Abstract

The utility model discloses front area-adjustable wind turbine blades, the wind turbine blades can fold and unfolded according to different rotating angles of the whole wind wheel to enable the front areas of the blades to be changed following with the rotating of the wind wheel, thereby effectively collecting the wind energy. The utility model has advantages of compact and reasonable design, low failure rate, simple and convenient transporting, mounting and maintaining, is applied to the low wind speed area, and the utilization ratio of the wind energy can achieve 80%.

Description

The pneumatic equipment blades made of frontal area adjustable
Technical field
The utility model discloses a kind of pneumatic equipment blades made of frontal area adjustable, belongs to the wind energy conversion system technical field.
Background technique
Wind energy more and more is subjected to the attention of countries in the world as the reproducible energy of a kind of cleaning.Its amount of accumulateing is huge, and the wind energy in the whole world is about 2.74 * 10 9MW, wherein available wind energy is 2 * 10 7MW, also bigger 10 times than the water energy total amount that can develop on the earth, but utilization ratio of wind energy is but not high, and therefore how effectively to utilize wind energy fully is the problem that people probed into always.
With the wind-power electricity generation is example, and the collection of traditional wind energy both at home and abroad all is confined to Bates (Betz) theory with use, and the maximum value of its power coefficient is 0.593.2004, the India researcher made power coefficient and has reached 0.89 maximum value report.But no matter power coefficient is 0.593 or 0.89, and we have to admit: the wind energy that collects is converted to have huge consume in the electric energy process, make 1/4 of the last electric power that produces not enough original wind energy far away.
The wind power collecting equipment of present employed wind-driven generator is based on three blades, and rotor diameter is all more than hundreds of feet.Huge structure and equipment are that the cost of equipment cost, installation and maintenance is all very expensive.
There is following technical deficiency in existing pneumatic equipment blades made:
1) wind-exposuring area of blade is certain, a part of blade be in facing the wind, the accurate state that facings the wind, another part blade then is in against the wind and half state against the wind, can offset part moment like this, thereby reduce the efficient of gathering wind energy.
2) area of blade is huge, and the cost that transports, sets up and keep in repair is generally higher, and rate of fault is also high.
3) in the unit time, the wind energy that wind wheel blade A can gather under the perfect condition is PA,
PA= 1/ 2ρ×A×V 3
Wherein, ρ is an air density (unit: kg/m 3), A is a wind wheel blade swept area (unit: m 2), V is a wind speed, (unit: m/s).
Because wind wheel is subjected to the influence of wind speed and wind direction fluctuation in wind field, the available power of wind energy conversion system output is further reduced.Consider this factor, the actual acquisition available wind energy of wind energy conversion system is PA (having),
PA (having)= 1/ 2ρ * A * V 3* Cp * η,
Wherein η represents system effectiveness, and general η is 0.7, and Cp represents power coefficient, and maximum value is 0.593, and therefore Cpmax * η=0.593 * 0.7 ≈ 0.42, really seldom surpasses wind wheel blade from the power that wind energy conversion system obtained and gather 40% of wind energy.
Can not adjust the technological deficiency of wind-exposuring area with the wind at wind wheel blade, Chinese patent CN101225796A discloses the blade that can regulate wind-exposuring area, each fan blade body (being equivalent to the blade described in the utility model) is made up of the blade (being equivalent to the folding blade described in the utility model) of two mutual hinges, the windward side of hinge leaf adopts spring that two blades are linked to each other, purpose is, when the fan blade body does not facing the wind, two blades can be closed under the elastic force effect of spring, reduces resistance.The deficiency of this patent is that opening of whole fan blade body needs wind energy to drive, and therefore can consume the part wind energy unavoidably; Secondly the time of opening of whole fan blade body also just could open when wind direction and fan blade body are vertical fully fully, and the time is shorter relatively, and the efficient of gathering wind energy is lower.
Summary of the invention
For solving above technical problem, the utility model discloses the pneumatic equipment blades made that a kind of energy is suitable for low wind speed area, gathers the high frontal area adjustable of wind energy efficiency.
The technical solution of the utility model is as follows:
A kind of pneumatic equipment blades made of frontal area adjustable comprises petiole and folding blade, it is characterized in that, pneumatic equipment blades made also comprises the controlling rod of taking down the exhibits, linkage rod, couple axle and balancing weight, is provided with folding blade at petiole away from the end bilateral symmetry of horizontal axis, and couple axle is parallel to petiole; Folding blade is provided with skeleton, and an end of two linkage rod is connected by bearing and couple axle are vertical respectively, and the other end is connected with the skeleton bearing parallel with petiole on two folding blades respectively; The end of controlling rod of taking down the exhibits is connected with the couple axle vertical fixing, away from horizontal the tip of the axis an axial jacket casing vertical with petiole is set at petiole, and the controlling rod of taking down the exhibits runs through and is arranged in the jacket casing, and the other end of the controlling rod of taking down the exhibits is fixedlyed connected with balancing weight.Pneumatic equipment blades made of the present utility model can be fixedly mounted on the horizontal axis of wind energy conversion system, forms wind wheel; Blade can launch or closure according to the difference of wind wheel angle of swing, and the wind-exposuring area of blade can be changed with the rotation of wind wheel: for example when the angle of blade rotation was in down with the wind, blade was carried out to maximum, and blade was in and gathered fully the wind energy stage this moment; When the angle of blade rotation was in against the wind, blade was closed to minimum, and this moment, blade was in the incomplete collection wind energy stage, had also reduced the reverse resistance that produces simultaneously, had increased utilization ratio of wind energy.
The material of described folding blade is a carbon fibre cloth.
The length of described petiole is 2~3 meters.
Described folding blade is long: 1~1.2 meter, wide: 0.2~0.4 meter.
Described balancing weight weighs 0.8~1.5kg.The purpose that increases balancing weight is: make wind wheel can produce maximum moment when hanging down wind speed, to keep normal rotation; Secondly; Utilize gravity, make the take down the exhibits automatic opening and closing of controlling rod control blade of balancing weight tractive.
The method of work of described pneumatic equipment blades made, process is as follows:
5 pneumatic equipment blades mades are fixedly installed on the horizontal axis of wind energy conversion system, form wind wheel, and the angle number of degrees of the petiole of adjacent pneumatic equipment blades made are 72 degree;
When blade rotates to 0 when spending by 270 degree, the state of blade is by the dotted portion of Fig. 4 transition process to the solid line part: when blade is rotated counterclockwise when 0 spends, balancing weight 10 is because of the direction motion of gravity to the blade closure, drive the direction motion of controlling rod 7 of taking down the exhibits immediately to the blade closure, the other end of controlling rod 7 of taking down the exhibits is connected with couple axle 9, couple axle 9 controlling rod 7 of being taken down the exhibits pushes away blade, and the angle between two linkage rod 8 becomes big simultaneously, and promptly blade is flared to maximum subtended angle gradually;
When blade rotates to 90 when spending by 0 degree, the state of blade is Fig. 4,5 solid line part: balancing weight 10 is stuck in from the nearest place of blade because of the effect of gravity, the other end of controlling rod 7 of taking down the exhibits is connected with couple axle 9, couple axle 9 controlling rod 7 of being taken down the exhibits pushes away and is stuck in from blade position farthest, it is maximum that angle between two linkage rod 8 keeps, and promptly blade keeps maximum subtended angle;
When blade rotates to 180 when spending by 90 degree, the state of blade be by the solid line of Fig. 4 partly to the transition process of dotted portion: when blade is rotated counterclockwise when 180 spend, balancing weight 10 is because of the direction motion of gravity to mounted blade, drive the direction motion of controlling rod 7 of taking down the exhibits immediately to mounted blade, the other end of controlling rod 7 of taking down the exhibits is connected with couple axle 9, taken down the exhibits controlling rod 7 of couple axle 9 furthers to direction blade, and the angle between two linkage rod 8 diminishes simultaneously, and promptly blade is closed to minimum angle gradually;
When blade rotates to 270 when spending by 180 degree, the state of blade is the dotted portion of Fig. 4: balancing weight 10 is stuck in from blade place farthest because of the effect of gravity, the other end of controlling rod 7 of taking down the exhibits is connected with couple axle 9, couple axle 9 controlling rod of being taken down the exhibits furthers and is stuck in from the nearest position of blade, it is minimum that angle between two linkage rod 8 keeps, and promptly blade keeps minimum angle.
Preferably, the opening angle of described blade is 135 degree to the maximum.
Advantage of the present utility model is:
1) vane design of wind turbines compactness of the present utility model, rationally, rate of fault is low, and transportation, installation and maintenance are simple and convenient, economic and practical.
When 2) the utility model is applied in wind collecting, controls blade area mechanically and change with the rotation of wind wheel, the resistance when reducing running reaches more than 80% utilization ratio of wind energy.
Description of drawings
Fig. 1 is the opening and closing schematic representation of pneumatic equipment blades made;
Fig. 2 is the structural representation of frontal area adjustable pneumatic equipment blades made, and wherein solid line partly is the complete open state of blade, and dotted portion is the complete closed state of blade;
Fig. 3 is the right elevation of Fig. 2 solid line part.
In Fig. 1-3: 1, petiole; 2, horizontal axis; 3, wind wheel; 4, folding blade; 5, wind direction; 6, sleeve; 7, the controlling rod of taking down the exhibits; 8, linkage rod; 9, couple axle; 10, balancing weight; 11, skeleton; 12, bearing.
Embodiment
Below in conjunction with embodiment the utility model is described further, but is not limited thereto.
Embodiment 1,
A kind of pneumatic equipment blades made of frontal area adjustable comprises petiole 1 and folding blade 4, it is characterized in that, pneumatic equipment blades made also comprises the controlling rod 7 of taking down the exhibits, linkage rod 8, couple axle 9 and balancing weight 10, be provided with folding blade 4 at petiole 1 away from the end bilateral symmetry of horizontal axis 2, couple axle 9 is parallel to petiole 1; Folding blade 4 is provided with an end of 11, two linkage rod 8 of skeleton respectively by bearing 12 and 9 vertical connections of couple axle, and the other end is connected with skeleton 11 bearings parallel with petiole on two folding blades 4 respectively; The end of controlling rod 7 of taking down the exhibits is connected with couple axle 9 vertical fixing, away from the end of horizontal axis 2 axially vertical with petiole 1 jacket casing 6 is set at petiole 1, the controlling rod 7 of taking down the exhibits runs through and is arranged in the jacket casing 6, and the other end of the controlling rod 7 of taking down the exhibits is fixedlyed connected with balancing weight 10.
The material of described folding blade 4 is a carbon fibre cloth.
The length of described petiole 1 is 2~3 meters.
Described folding blade 4 length: 1~1.2 meter, wide: 0.2~0.4 meter.
Described balancing weight 10 heavy 0.8~1.5kg.
The method of work of embodiment's 1 described pneumatic equipment blades made, process is as follows:
5 pneumatic equipment blades mades are fixedly installed on the horizontal axis 2 of wind energy conversion system, form wind wheel 3, and the angle number of degrees of the petiole 1 of adjacent pneumatic equipment blades made are 72 degree;
When blade rotates to 0 when spending by 270 degree, the state of blade is by the dotted portion of Fig. 2 transition process to the solid line part: when blade is rotated counterclockwise when 0 spends, balancing weight 10 is because of the direction motion of gravity to the blade closure, drive the direction motion of controlling rod 7 of taking down the exhibits immediately to the blade closure, the other end of controlling rod 7 of taking down the exhibits is connected with couple axle 9, couple axle 9 controlling rod 7 of being taken down the exhibits pushes away blade, and the angle between two linkage rod 8 becomes big simultaneously, and promptly blade is flared to maximum subtended angle gradually; Pneumatic equipment blades made begins to enter to be gathered the wind energy stage.
When blade rotates to 90 when spending by 0 degree, the state of blade is Fig. 2,3 solid line part: balancing weight 10 is stuck in from the nearest place of blade because of the effect of gravity, the other end of controlling rod 7 of taking down the exhibits is connected with couple axle 9, couple axle 9 controlling rod 7 of being taken down the exhibits pushes away and is stuck in from blade position farthest, it is maximum that angle between two linkage rod 8 keeps, and promptly blade keeps maximum subtended angle; Pneumatic equipment blades made opens fully, with the area of contact maximum of wind direction 5, therefore is in and gathers fully the wind energy stage.
When blade rotates to 180 when spending by 90 degree, the state of blade be by the solid line of Fig. 2 partly to the transition process of dotted portion: when blade is rotated counterclockwise when 180 spend, balancing weight 10 is because of the direction motion of gravity to mounted blade, drive the direction motion of controlling rod 7 of taking down the exhibits immediately to mounted blade, the other end of controlling rod 7 of taking down the exhibits is connected with couple axle 9, taken down the exhibits controlling rod 7 of couple axle 9 furthers to direction blade, and the angle between two linkage rod 8 diminishes simultaneously, and promptly blade is closed to minimum angle gradually; Pneumatic equipment blades made begins to enter the incomplete collection wind energy stage.
When blade rotates to 270 when spending by 180 degree, the state of blade is the dotted portion of Fig. 3: balancing weight 10 is stuck in from blade place farthest because of the effect of gravity, the other end of controlling rod 7 of taking down the exhibits is connected with couple axle 9, couple axle 9 controlling rod 7 of being taken down the exhibits furthers and is stuck in from the nearest position of blade, it is minimum that angle between two linkage rod 8 keeps, and promptly blade keeps minimum angle.Pneumatic equipment blades made is closed fully, with the area of contact minimum of wind direction 5, therefore is in and does not gather the wind energy stage.
The opening angle of described blade is 135 degree to the maximum.

Claims (5)

1. the pneumatic equipment blades made of a frontal area adjustable comprises petiole and folding blade, it is characterized in that, pneumatic equipment blades made also comprises the controlling rod of taking down the exhibits, linkage rod, couple axle and balancing weight, is provided with folding blade at petiole away from the end bilateral symmetry of horizontal axis, and couple axle is parallel to petiole; Folding blade is provided with skeleton, and an end of two linkage rod is connected by bearing and couple axle are vertical respectively, and the other end is connected with the skeleton bearing parallel with petiole on two folding blades respectively; The end of controlling rod of taking down the exhibits is connected with the couple axle vertical fixing, away from horizontal the tip of the axis an axial jacket casing vertical with petiole is set at petiole, and the controlling rod of taking down the exhibits runs through and is arranged in the jacket casing, and the other end of the controlling rod of taking down the exhibits is fixedlyed connected with balancing weight.
2. pneumatic equipment blades made according to claim 1 is characterized in that, the material of described folding blade is a carbon fibre cloth.
3. pneumatic equipment blades made according to claim 1 is characterized in that, the length of described petiole is 2~3 meters.
4. pneumatic equipment blades made according to claim 1 is characterized in that, described folding blade is long: 1~1.2 meter, wide: 0.2~0.4 meter.
5. pneumatic equipment blades made according to claim 1 is characterized in that described balancing weight weighs 0.8~1.5kg.
CN2010205157694U 2010-09-03 2010-09-03 Front area-adjustable wind turbine blades Expired - Lifetime CN201763523U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010205157694U CN201763523U (en) 2010-09-03 2010-09-03 Front area-adjustable wind turbine blades

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2010205157694U CN201763523U (en) 2010-09-03 2010-09-03 Front area-adjustable wind turbine blades

Publications (1)

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CN201763523U true CN201763523U (en) 2011-03-16

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101915205A (en) * 2010-09-03 2010-12-15 许士泉 Frontal area adjustable wind machine blade and operating method thereof
CN111322199A (en) * 2020-03-31 2020-06-23 邓虎成 Wind energy machine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101915205A (en) * 2010-09-03 2010-12-15 许士泉 Frontal area adjustable wind machine blade and operating method thereof
CN101915205B (en) * 2010-09-03 2012-11-07 许士泉 Frontal area adjustable wind machine blade
CN111322199A (en) * 2020-03-31 2020-06-23 邓虎成 Wind energy machine

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GR01 Patent grant
AV01 Patent right actively abandoned

Granted publication date: 20110316

Effective date of abandoning: 20130227

RGAV Abandon patent right to avoid regrant