CN202690335U - Wind-driven generator blade capable of passively regulating speed - Google Patents
Wind-driven generator blade capable of passively regulating speed Download PDFInfo
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- CN202690335U CN202690335U CN2012203566417U CN201220356641U CN202690335U CN 202690335 U CN202690335 U CN 202690335U CN 2012203566417 U CN2012203566417 U CN 2012203566417U CN 201220356641 U CN201220356641 U CN 201220356641U CN 202690335 U CN202690335 U CN 202690335U
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- wind
- blade
- driven generator
- air
- windward side
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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
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The utility model discloses a wind-driven generator blade capable of passively regulating speed. The wind-driven generator blade comprises a windward side and a lee side, wherein air chambers are respectively formed on the windward side and the lee side and are connected with each other through an airflow channel; a pneumatic overflow valve is arranged in the airflow channel; skins are formed on the exterior of the air chambers; through holes are formed in the skins; the skins are made of metal sheet materials; the thickness of each skin is not less than the aperture of each through hole; and the overflowing pressure of the pneumatic overflow valve is preset as the pressure difference between the air pressure of the windward side and the air pressure of the lee side at a rated wind speed. The wind-driven generator blade has the advantages of simple structure, low cost, high reliability and the like; and the blade is capable of automatically adjusting the rotation speed of a wind-driven generator according to a wind speed during the whole running process of the wind-driven generator, so that the rotation speed of wind wheels can be maintained at a rated value, and unbalance load on the wind wheels of the wind-driven generator can be removed. The blade provided by the utility model overcomes the shortcomings that the conventional variable-pitch blade is complex in structure, and the stall type blade is hard to control after stalling.
Description
Technical field
The utility model relates to technical field of wind power generating equipment, relates in particular to the blade of wind-driven generator of the passive speed governing of a kind of energy.
Background technique
Along with the aggravation of the energy and environmental crisis, " new energy " of the green non-pollutions such as solar energy, wind energy, geothermal power and ocean ocean current more and more come into one's own.China's wind power resources deposit is abundant, and the wind energy conversion system manufacturing technology is also more and more ripe, and in order to improve the reliability of unit, multiple advanced technology is applied in the modern wind machine.The blade of wind-driven generator is the critical piece that wind-driven generator obtains aerodynamic energy, and the lift that the air pressure difference of blade windward side and lee face produces is to promote wind wheel to rotate the power that produces power.Realize that by the aeroelasticity feature that changes blade passive speed governing once was the power control mode that generally adopts in the past, main representative is the Stall Type blade of wind-driven generator.The working procedure of Stall Type blade of wind-driven generator is as follows: when wind speed surpassed rated wind speed, the stall effect can occur in blade, and lift coefficient can reduce, and resistance coefficient can increase, thereby wind speed round is not increased with the increase of wind speed.Its defective is, the Stall Type wind energy conversion system is after arriving stall conditions, the aerodynamic characteristic of blade has uncertainty, this uncertainty can cause rated wind speed or more during high wind speed the mistake to power level and blade loading estimate, cause the fatigue damage of the unstable and unit of output power, so the Stall Type blade is replaced by active variable-pitch type blade gradually in recent years.It is to drive pulp distance varying mechanism by power mechanism to change the angle that blade facings the wind that active change oar is regulated, thereby changes the lift-drag ratio of blade, makes impeller still can keep rated speed constant when rated wind speed is above.Generally adopt now the feather mode that Driven by Hydraulic Cylinder mode and motor drive mode are arranged, under current technical specifications, realization is relatively easy with the feather control of upper type, but initiatively the variable-pitch type blade needs power source, corresponding mechanical construction and control system, its complex structure, be in operation and easily break down, manufacturing and maintenance cost are higher.The external corresponding research that the change oar speed governing of pair passive type is also arranged, this mode has reduced power source, but still needs extra mechanical structure.
Summary of the invention
The purpose of this utility model is exactly complicated in order to solve the active variable-pitch type blade structure that prior art exists, and operational reliability is poor and make the problem such as maintenance cost height; The blade of wind-driven generator of the passive speed governing of a kind of energy is provided; Have simple in structure, with low cost, high reliability, in the whole service process of wind energy conversion system, blade can be regulated automatically according to the size of wind speed the rotating speed of wind-driven generator, makes wind speed round maintain rated speed, and can eliminate the unbalanced load on the wind turbines rotor.This blade overcomes unmanageable shortcoming behind the complicated and Stall Type blade stall of traditional variable pitch type blade structure.
To achieve these goals, the utility model adopts following technological scheme:
The blade of wind-driven generator of the passive speed governing of a kind of energy, blade comprises windward side and lee face, is respectively equipped with air cavity on windward side and the lee face, the air cavity that be connected with lee face the windward side connects by air-flow path, is provided with the actuated overflow valve in the air-flow path.
Outside at air cavity is provided with covering, is processed with through hole on the covering.
Covering adopts sheetmetal or composite material.
The thickness of the aperture≤covering of through hole.
The pressure reduction of the air pressure of windward side and lee face air pressure when the oil pressure relief of actuated overflow valve is preset as rated wind speed.
Working principle: the utility model comprises windward side and lee face, be respectively equipped with air cavity on windward side and the lee face, the air cavity that be connected with lee face the windward side connects by air-flow path, be provided with the actuated overflow valve in the air-flow path, the pressure reduction of the air pressure of windward side and lee face air pressure when the oil pressure relief of actuated overflow valve is preset as rated wind speed.Outside at air cavity is provided with covering, processes through hole on the covering, and covering adopts metallic sheet stock, the thickness of the aperture≤covering of through hole.The inlet pressure of actuated overflow valve is windward side pressure, and outlet pressure is lee face pressure, the air pressure difference on two sides when oil pressure relief is rated wind speed.At wind speed hour, the pressure reduction on two sides does not reach the oil pressure relief of relief valve, and valve keeps blocked state, and the lift of blade is followed wind speed and changed.After wind speed surpassed rated wind speed, the pressure reduction on two sides reached the oil pressure relief of relief valve, and relief valve is opened, air between two faces goes into circulation, the pressure reduction on two sides reduces accordingly, the preset pressure of relief valve until the pressure difference on two sides reduces, and relief valve cuts out.By the break-make of relief valve, can make two pressure differences between the face maintain steady state value, even also the lift of blade maintains steady state value.Adopt this blade can make the rotating speed of wind wheel when rated wind speed is above, maintain rated speed, also can realize the elimination to the wind energy conversion system unbalanced load simultaneously.
The beneficial effects of the utility model:
Simple in structure, with low cost, reliability is high, in the whole service process of wind energy conversion system, blade can automatically be regulated according to the size of wind speed the rotating speed of wind-driven generator, make wind speed round maintain rated speed;
2. can eliminate the unbalanced load on the wind turbines rotor, overcome unmanageable shortcoming behind the complicated and Stall Type blade stall of traditional variable pitch type blade structure.
Description of drawings
Fig. 1 is the plan view of the windward side of blade;
Fig. 2 is the plan view of the lee face of blade;
Fig. 3 is the structural drawing of rigidity covering;
Fig. 4 is the A-A cross section of blade;
Fig. 5 is the pressure distribution of blade surface;
Fig. 6 is rated wind speed when above, starts relief valve and opens the inside and outside air stream cardon of rear blade;
Among the figure, 1 blade, 2 coverings, 3 through holes, 4. actuated overflow valve, 5 air cavitys, 6 windward sides, 7 lee faces, 8. air-flow path.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is described further.
The blade of wind-driven generator of the passive speed governing of a kind of energy, to shown in Figure 6, blade 1 comprises windward side 6 and lee face 7, is respectively equipped with air cavity 5 on windward side 6 and the lee face 7 such as Fig. 1, the air cavity 5 that be connected with lee face the windward side connects by air-flow path 8, is provided with actuated overflow valve 4 in the air-flow path 8.Be provided with covering 2 in the outside of air cavity 5, be processed with through hole 3 on the covering 2.Covering 2 adopts metallic sheet stock.The thickness of the aperture≤covering of through hole 3.The pressure reduction of the air pressure of windward side 6 and lee face 7 air pressures when the oil pressure relief of actuated overflow valve 4 is preset as rated wind speed.Fig. 5 is the pressure distribution on wind energy conversion system working state lower blade two sides, and the air pressure of establishing the windward side is positive pressure P+, and lee face pressure is negative pressure P-, and in general, the absolute value of P-is greater than P+.The pressure reduction P=|P+|+|P-| on blade both sides produces the lift that promotes blade rotation, and the size that changes P can change the size of lift.
The working procedure of actuated overflow valve 4 is as follows: the inlet pressure of valve is windward side air pressure P+, and outlet pressure is lee face air pressure P-, the pressure reduction P on two sides when oil pressure relief is preset as rated wind speed
e, when rated wind speed is following, the pressure reduction P＜P on both sides
e, relief valve is blocking state; When rated wind speed is above, the pressure reduction P on both sides〉P
e, relief valve is opened.
The concrete working procedure of blade is as follows: the air cavity 5 of blade 1 inside is communicated with windward side and the lee face of blades, and the outer surface of air cavity covers the rigidity covering 2 of porous.The inside of air cavity arranges 4 blocking-up of actuated overflow valve, the oil pressure relief P of actuated overflow valve
eThe pressure difference on two sides during for rated wind speed.When rated wind speed was following, the pressure reduction of air windward side and lee face was P
1＜P
e, the actuated overflow valve keeps blocking state, and windward side and the lee face of blade do not have air ventilation, the air pressure difference P on two faces
1Do not change, self airmechanics feature of blade does not change, and rotating speed increases with the increase of wind speed; After wind speed surpassed rated wind speed, because the air pressure difference between windward side and the lee face becomes large, this moment, pressure reduction was P
2, P
2P
eActuated overflow valve 4 in the pressure chamber is opened, air begins to flow to low pressure area by air cavity by the zone of high pressure, it is constant that pressure difference between blade windward side and the lee face keeps, the lift of blade maintains steady state value, and then making wind speed round maintain rated speed, the lift of this mode is regulated and can also be eliminated the uneven air load that acts on the wind wheel simultaneously.This blade can be passive change self airmechanics feature according to wind speed, keeps constant lift, the wind-driven generator rotating speed is maintained near the rated speed, eliminate the unbalanced load of wind-driven generator, the passive speed governing of realization wind energy conversion system.
Although above-mentionedly by reference to the accompanying drawings the embodiment of model utility is described; but be not the restriction to the utility model protection domain; one of ordinary skill in the art should be understood that; on the basis of the technical solution of the utility model, those skilled in the art do not need to pay various modifications that creative work can make or distortion still in protection domain of the present utility model.
Claims (5)
1. the blade of wind-driven generator of the passive speed governing of energy, blade comprises windward side and lee face, it is characterized in that, is respectively equipped with air cavity on windward side and the lee face, the air cavity that be connected with lee face the windward side connects by air-flow path, is provided with the actuated overflow valve in the air-flow path.
2. the blade of wind-driven generator of the passive speed governing of energy as claimed in claim 1 is characterized in that, described outside at air cavity is provided with covering, and covering is provided with through hole.
3. the blade of wind-driven generator of the passive speed governing of energy as claimed in claim 2 is characterized in that, described covering adopts sheetmetal or composite material.
4. the blade of wind-driven generator of the passive speed governing of energy as claimed in claim 2 is characterized in that, the thickness of the aperture≤covering of described through hole.
5. the blade of wind-driven generator of the passive speed governing of energy as claimed in claim 1 is characterized in that, the pressure reduction of the air pressure of windward side and lee face air pressure when the oil pressure relief of described actuated overflow valve is preset as rated wind speed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012203566417U CN202690335U (en) | 2012-07-21 | 2012-07-21 | Wind-driven generator blade capable of passively regulating speed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012203566417U CN202690335U (en) | 2012-07-21 | 2012-07-21 | Wind-driven generator blade capable of passively regulating speed |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202690335U true CN202690335U (en) | 2013-01-23 |
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ID=47545961
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012203566417U Expired - Fee Related CN202690335U (en) | 2012-07-21 | 2012-07-21 | Wind-driven generator blade capable of passively regulating speed |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202690335U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102748247A (en) * | 2012-07-21 | 2012-10-24 | 济南轨道交通装备有限责任公司 | Blade of wind driven generator with speed capable of being adjusted passively |
| CN108425802A (en) * | 2017-07-13 | 2018-08-21 | 金祺然 | Direction-changing type convex wing type power generator |
-
2012
- 2012-07-21 CN CN2012203566417U patent/CN202690335U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102748247A (en) * | 2012-07-21 | 2012-10-24 | 济南轨道交通装备有限责任公司 | Blade of wind driven generator with speed capable of being adjusted passively |
| CN108425802A (en) * | 2017-07-13 | 2018-08-21 | 金祺然 | Direction-changing type convex wing type power generator |
| CN108425802B (en) * | 2017-07-13 | 2018-12-21 | 金祺然 | Direction-changing type convex wing type power generator |
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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: 20130123 Termination date: 20170721 |
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| CF01 | Termination of patent right due to non-payment of annual fee |