CN202381254U - Lift-type blade - Google Patents
Lift-type blade Download PDFInfo
- Publication number
- CN202381254U CN202381254U CN 201120510773 CN201120510773U CN202381254U CN 202381254 U CN202381254 U CN 202381254U CN 201120510773 CN201120510773 CN 201120510773 CN 201120510773 U CN201120510773 U CN 201120510773U CN 202381254 U CN202381254 U CN 202381254U
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- CN
- China
- Prior art keywords
- blade
- trailing edge
- lift
- blades
- wind
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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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
- Y02E10/74—Wind turbines with rotation axis perpendicular to the wind direction
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- Wind Motors (AREA)
Abstract
The utility model discloses a lift-type blade which comprises a blade main body and trailing edge blades, wherein the number of the trailing edge blades is two, one end of each trailing edge blade is respectively articulated on the blade main body, and an opening-closing mechanism for adjusting the opening or closing angle of two trailing edge blades is connected between the two trailing edge blades. The lift-type blade adopts a split design, and the blade of the trailing edge can be open or closed. During the start-up and the normal operation of a wind turbine, the trailing edge blades are closed, the entire structure has a streamline form, and therefore the lift force is produced to drive the rotation of the wind turbine. Then the blades of the turbine are the same as other lift-type vertical-axis blades. The effect can ensure that the design of the blades does not affect the normal operation of the wind turbine.
Description
Technical field
The utility model relates to the wind energy conversion system technical field, specifically is a kind of lift-type blade.
Background technique
Compare with horizontal-shaft wind turbine, lifting upright shaft wind energy conversion system rotating speed is slow, and noise is low; Maintenance cost is low; Need not wind, do not have the driftage power loss.But the wind energy transformation rate of lifting upright shaft wind energy conversion system is lower than horizontal-shaft wind turbine, thereby development is slower, and utility ratio is lower.
Power coefficient than limit the fast development of lift vertical shaft wind energy conversion system.But the lift-type wind energy conversion system can not be controlled rotating speed and can't more make its application of maximizing be restricted by aerodynamic brake.Small wind turbine is because the less structural strength that can adopt bigger physical dimension to satisfy wind energy conversion system of structure; Therefore the consideration that safety issue can be too many is generally adopted fixed pitch wind turbine or is not had the structure of aerodynamic force brake also not have too big safety problem.Add that the small wind turbine cost is lower,, it is changed the very big expense that also do not have even blade is damaged.Generally, small wind turbine does not generally have aerodynamic brake.But in the large scale wind power machine application facet because make and the cost safeguarded all in rapid increase, so its safety issue must be placed on a more importantly position.Lifting upright shaft wind mill pitch-variable design is ripe not enough, and the purpose of feather research and design also is to increase exerting oneself of lift-type wind energy conversion system at present, is not to be used to be limited in the rotating speed strong wind under and to exert oneself.Therefore, its starting point and horizontal-shaft wind turbine is different fully.This just causes large scale wind power machine under strong wind; Can't utilize aerodynamics to control the rotating speed of wind energy conversion system; Even the situation that under high wind speed, wind energy conversion system is stopped fully, so the Security of large scale wind power machine do not ensure, thus greatly limited the fast development of lift-type wind energy conversion system.
Want to break through this bottleneck, must solve wind energy conversion system aerodynamic force brake problem, wind energy conversion system can be under strong wind be braked by aerodynamic force shut down and slow down.
The model utility content
The utility model technical problem to be solved is the deficiency that exists to above-mentioned existing technology, and a kind of have separated and the adjustable lift-type blade of subtended angle are provided.
For solving the problems of the technologies described above; The technological scheme that the utility model adopts is following: a kind of lift-type blade; It is characterized in that: comprise blade body and trailing edge blade; Described trailing edge blade is two, and an end of two trailing edge blades is hinged on respectively on the described blade body, between two trailing edge blades, also is connected with the opening and closing mechanism of the described two trailing edge blade opening and closing angles of an adjusting.
Described opening and closing mechanism comprises that hydraulic jack, two connecting rods and are used to control the final controlling element of hydraulic jack delivery stroke, and an end of described two connecting rods is connected on the hydraulic jack, and the other end of two connecting rods is hinged on respectively on the two trailing edge blades.
Compared with prior art, the beneficial effect of the utility model is:
1, the lift-type blade adopts the split leaf design, and the subtended angle of the blade of trailing edge part is adjustable, both can open, and also can close up.The trailing edge blade closes up during with normal operation when wind energy conversion system starts, and integral body has streamlined, produces lift, promotes the wind energy conversion system rotation.This moment, pneumatic equipment blades made and other lift vertical shaft blades were as good as.This effect can guarantee that Blade Design does not influence the proper functioning of wind energy conversion system.
2, surpass the wind energy conversion system design wind speed when wind speed, and rotating speed touches hydraulic jack work when surpassing the wind energy conversion system design speed then, the trailing edge blade is opened by a small margin, has destroyed the lift force blade air-foil, and resistance increases, and the wind energy conversion system rotating speed descends.If rotating speed does not descend greatly because of wind yet, the liquid jack continues to promote trailing edge to be opened, up to invariablenes turning speed.This effect can guarantee the wind energy conversion system constant-speed operation.This effect can make wind energy conversion system outside rated wind speed along the rated power linear movement, guaranteed that wind energy conversion system efficiently moves.
3, when surpassing design very greatly, wind speed can bear wind speed; When perhaps needing wind energy conversion system to shut down; The command execution system will carry out halt command this moment, and hydraulic jack promotes trailing edge and opens fully, and blade airfoil is vertical with the string of a musical instrument up and down; The blade airfoil of perk will produce great aerodynamic resistance, and the wind energy conversion system rotating speed is sharply reduced.At this moment, the cooperative mechanical brake stops wind energy conversion system fully.If there is not aerodynamic brake wind energy conversion system net income then can't accomplish braking, very likely cause blower fan to damage with mechanical brake.This effect can make wind energy conversion system utilize aerodynamic resistance to produce aerodynamic brake, increases Security.
4, adopt the aerodynamic force brake, the lifting upright shaft wind energy conversion system is maximized, may operate under the higher wind speed, also can stand higher wind load, fan operation is more safe and reliable.
Description of drawings
Fig. 1 is the structural representation of the utility model lift-type blade.
Fig. 2 is the upright shaft wind motor schematic representation with the utility model lift force blade.
Fig. 3 is Fig. 2 upright shaft wind motor schematic top plan view.
Fig. 4 is the utility model lift force blade brake operation schematic representation.
Wherein: 1, blade; 2, air velocity transducer; 3, strut; 4, generator; 5, blower fan axle; 6, speed probe; 7, pylon; 8, blade interior support; 9, connecting rod; 10, trailing edge blade rotor; 11, blade body; 12, trailing edge blade; 13, command executer; 14, hydraulic jack; 15, connecting rod root rotating shaft.
Embodiment
Below in conjunction with accompanying drawing, the utility model is elaborated.As shown in Figure 1, there is inner support 8 blade 2 inside, play reinforced blade, fix with blade strut 3.Blade is formed by connecting blade body 11 and 12 separations of trailing edge blade, also is fixed with signal command final controlling element 13, hydraulic jack 14, connecting rod 9 in blade interior.Command executer 13 provides the fill order signal and touches hydraulic jack 14 work, promotes connecting rod 9 forward or backward.Push ahead, then through connecting rod top rotating shaft 11 and connecting rod root rotating shaft 15, to inner rotary one angle, open by blade around trailing edge blade rotor 10 for trailing edge blade 12; If to aftershrinkage, then trailing edge blade 12 closes up.
As shown in Figure 2, the wind energy conversion system device of employing the utility model lift-type blade comprises pneumatic equipment blades made 1, blade strut 3, generator 4, blower fan axle 5 and pylon 7.Through strut 3 the lift-type blade 2 more than 2 or 2 is being installed on the wind-force arbor 5.Air velocity transducer 2 is fixed in the blower fan top, and measuring height is higher than fan blade blade tip height; Speed probe 6 is fixed on the pylon 7, is used to measure the wind energy conversion system tach signal.
As shown in Figure 3, air velocity transducer 2 is given central control unit with speed probe 6 numbers of delivering a letter in time, and rotating speed is less than rated speed simultaneously if wind speed is less than the rated designs wind speed, and wind energy conversion system trailing edge blade 12 is in closed state; If wind speed is less than rated speed, but rotating speed touches command executer 13 greater than the rated speed certain hour, hydraulic jack 14 is opened trailing edge blade 12.When opening trailing edge blade 12 at a slow speed; Tach signal and wind velocity signal with feedback signal in central control unit; If the judgement rotating speed has downward trend but still is higher than rated speed; Perhaps rotating speed does not have downward trend, and then central control unit gives the wind energy conversion system command executer 13 orders, continues to open trailing edge blade 12.If feedback signal shows that trailing edge blade 12 is opened to rotating speed and is equal to or less than rated speed, then stops to open trailing edge blade 12, keep this rotating speed operation.If wind velocity signal detects in the wind speed several seconds much larger than design wind speed, then central control unit provides fill order, all opens trailing edge blade 12 rapidly, adopts aerodynamic brake.
After being illustrated in figure 4 as trailing edge blade 12 and partially opening, destroyed the streamlined flow field of blade wing, produced big resistance, played and slow down and the effect of brake.
Claims (2)
1. lift-type blade; It is characterized in that: comprise blade body and trailing edge blade; Described trailing edge blade is two; One end of two trailing edge blades is hinged on respectively on the described blade body, between two trailing edge blades, also is connected with the opening and closing mechanism of the described two trailing edge blade opening and closing angles of an adjusting.
2. lift-type blade according to claim 1; It is characterized in that: described opening and closing mechanism comprises that hydraulic jack, two connecting rods and are used to control the final controlling element of hydraulic jack delivery stroke; One end of described two connecting rods is connected on the hydraulic jack, and the other end of two connecting rods is hinged on respectively on the two trailing edge blades.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120510773 CN202381254U (en) | 2011-12-09 | 2011-12-09 | Lift-type blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120510773 CN202381254U (en) | 2011-12-09 | 2011-12-09 | Lift-type blade |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202381254U true CN202381254U (en) | 2012-08-15 |
Family
ID=46629764
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120510773 Expired - Fee Related CN202381254U (en) | 2011-12-09 | 2011-12-09 | Lift-type blade |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202381254U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104265561A (en) * | 2014-08-13 | 2015-01-07 | 上海理工大学 | Double-flapping wing blade for vertical axis wind turbine |
-
2011
- 2011-12-09 CN CN 201120510773 patent/CN202381254U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104265561A (en) * | 2014-08-13 | 2015-01-07 | 上海理工大学 | Double-flapping wing blade for vertical axis wind turbine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120815 Termination date: 20141209 |
|
| EXPY | Termination of patent right or utility model |