CN201943899U - Wind machine blade with noise reduction function - Google Patents
Wind machine blade with noise reduction function Download PDFInfo
- Publication number
- CN201943899U CN201943899U CN2010206723317U CN201020672331U CN201943899U CN 201943899 U CN201943899 U CN 201943899U CN 2010206723317 U CN2010206723317 U CN 2010206723317U CN 201020672331 U CN201020672331 U CN 201020672331U CN 201943899 U CN201943899 U CN 201943899U
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- blade
- tip
- segment
- pneumatic equipment
- blades made
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/30—Wind power
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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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Abstract
A wind machine blade with a noise reduction function comprises a blade tip part (11) and other parts (12) of the blade, which are formed integrally. The length of the blade tip part (11), along the unfolding direction of the blade, is 1.5 times of the chord length of the section of a root part of the blade; the chord length from the top of the blade tip part (11) to the cross section of the root part gradually enlarges; an outline of the blade tip part (11) comprises a frontal edge part A, a top end part B, a transition part C and a tail edge part D; the B, C and D parts of the outline are undulated; and sawtooth sections are arranged on the edges of the B, C and D parts of the outline.
Description
Technical field
The utility model relates to a kind of pneumatic equipment blades made, relates in particular to a kind of pneumatic equipment blades made with decrease of noise functions.
Background technique
The large scale development trend of wind-powered electricity generation unit impels the length of pneumatic equipment blades made constantly to increase, the sound power level of wind-powered electricity generation unit radiated noise also increases thereupon fast, existing the analysis showed that, the main noise of modern large-scale wind electricity unit derives from the aerodynamic noise of blade, and levels of aerodynamic noise 5 powers approximate and tip speed are proportional.In order to satisfy the requirement of Standard of Environmental Noise, the design speed control of national requirements wind energy conversion systems such as America and Europe causes under rated wind speed within the specific limits, and power coefficient is away from the devise optimum value.If can reduce the aerodynamic noise of blade, thereby make the restriction rotating speed of wind energy conversion system improve, the corresponding reduction of rated wind speed, wind energy just can be utilized more fully.Simultaneously, the rotating speed that improves wind energy conversion system can also reduce the moment of torsion that acts in the wind energy conversion system rotating shaft, and the load of parts such as the main shaft of minimizing wind-powered electricity generation unit, gear-box, generator strengthens the structural safety reliability.In addition, in the Blade Design process, by the low noise Blade Design, improve the restriction rotating speed of blower fan, thereby the tip-speed ratio of optimum power coefficient correspondence is further improved, can also reduce the solidity of blade, the weight of minimizing blade also reduces cost.
The main noise source of wind-powered electricity generation unit embodies a concentrated reflection of on the aerodynamic noise of blade at present, and the mechanical noise in cabin has obtained better controlled.The aerodynamic noise mechanism of blade, be exactly in brief, the wind comes from and pylon influence under unsteady flow field and blade interact, produce at blade surface and to adhere to the whirlpool, separate whirlpool and the tail whirlpool etc. that comes off, blade surface becomes the sound source radiation sounding thereby these non-permanent whirlpools and blade surface interact excitation.Wherein the noise that causes that comes off in interaction of blade tip trailing edge whirlpool and trailing edge and blade tip whirlpool is one of main noise source of wind energy conversion system.The blade tip noise of wind electricity blade can reduce by reasonable correction blade tip shape.
Prior art is mainly taked the trailing edge at pneumatic equipment blades made to carry out the profile of tooth transformation to reduce noise.
Patent EP0652367 suggestion equipment has the pneumatic equipment blades made of dissimilar profile of tooth trailing edges.
Patent EP1314885 suggestion equipment has the pneumatic equipment blades made of the panel of castellated shape.
Patent EP1338793 suggestion equipment has the pneumatic equipment blades made of profile of tooth trailing edge, and the length of tooth and the space width that makes progress in the pneumatic equipment blades made exhibition are variable.
The deficiencies in the prior art part is, mainly is that the shape by the control blade trailing edge reaches the purpose that reduces noise, for another main source of noise---the blade tip noise that the whirlpool causes that comes off, do not take effective technical means to be controlled.
The utility model provides a kind of pneumatic equipment blades made that can effectively reduce the noise that the blade tip whirlpool causes.
Summary of the invention
At the deficiencies in the prior art and shortcoming, the utility model increases from the geometrical shape of optimizing the pneumatic equipment blades made tip segment with at the profile line of tip segment and starts with aspect these two of the toothed segment, reduce the vortex strength degree that comes off of blade tip effectively, reduced the aerodynamic noise that the whirlpool that comes off by blade tip causes.
The utility model is that the technological scheme that its technical problem of solution is adopted is:
A kind of pneumatic equipment blades made with decrease of noise functions, comprise tip segment and blade other parts, described tip segment and blade other parts are integrally formed, it is characterized in that, described tip segment is 1.5 times of chord length of its root section along blade exhibition length upwards, chord length from the top of tip segment to the cross section of its root increases gradually, the profile line of tip segment comprises leading edge portion A, head portion B, transition portion C, reaches trailing edge part D, the B of described profile line, C, D part profile undulate;
Described leading edge portion A, head portion B, transition portion C, and the appearance curve of trailing edge part D satisfy following relationship respectively:
The appearance curve of leading edge portion A:
,
The appearance curve of head portion B:
,
The appearance curve of transition portion C:
,
The appearance curve of trailing edge part D:
Wherein, x is the chord length of the distance of on the profile line of tip segment certain root cross section of putting tip segment divided by blade tip root cross section, and y is that on the profile line of tip segment certain is put the chord length of the distance on vertical with blade tip root cross section and plane that comprise root cross section trailing edge point divided by blade tip root cross section;
The B of described profile line, C, D part edge are provided with toothed segment.
Through the restriction and the optimization of the geometrical shape of above-mentioned tip segment to pneumatic equipment blades made, add the mate-assist of toothed segment, can reduce the intensity in the whirlpool that comes off of tip segment effectively, and then suppress the aerodynamic noise that causes by the whirlpool that comes off effectively.
Preferably, described tip segment and blade other parts are independent respectively to be shaped, and the two mode by bonding combines.
Preferably, described toothed segment directly processes on tip segment.
Preferably, described toothed segment forms by pasting Saw blade at described tip segment.
Preferably, the root between the adjacent sawtooth of described toothed segment directly links to each other or does not link to each other.
Preferably, the height of sawtooth is 2h, and the distance between the adjacent sawtooth tip is λ, and h/ λ is an arbitrary value.
Preferably, also be provided with toothed segment on the trailing edge of described blade other parts, the intensity in whirlpool thereby the inhibition trailing edge comes off.
Preferably, described pneumatic equipment blades made with decrease of noise functions uses on horizontal-shaft wind turbine.
Description of drawings
Fig. 1 is the schematic representation with pneumatic equipment blades made of decrease of noise functions of the present utility model.
Fig. 2 is the enlarged diagram of tip segment.
Fig. 3 is the profile line schematic representation of tip segment.
Fig. 4 a, 4b, 4c are the sawtooth schematic representation of tip segment.
Embodiment
For making the purpose of this utility model, technological scheme and advantage clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, the utility model is further described.
Fig. 1 to Fig. 4 is the schematic representation with pneumatic equipment blades made of decrease of noise functions of the present utility model.A kind of pneumatic equipment blades made 1 with decrease of noise functions, comprise tip segment 11 and blade other parts 12, described tip segment 11 and blade other parts 12 are integrally formed, described tip segment 11 is 1.5 times of chord length of its root section along blade 1 exhibition length upwards, and the chord length from the top of tip segment 11 to the cross section of its root increases gradually.The profile line of tip segment 11 comprises leading edge portion A, head portion B, transition portion C, reaches trailing edge part D, and the B of described profile line, C, D part profile undulate are as Fig. 2, shown in Figure 3.Leading edge portion A, head portion B, transition portion C, and the appearance curve of trailing edge part D satisfy following relationship respectively:
The appearance curve of leading edge portion A:
,
The appearance curve of head portion B:
,
The appearance curve of transition portion C:
,
The appearance curve of trailing edge part D:
Wherein, x is the chord length of the distance of on the profile line of tip segment certain root cross section of putting tip segment divided by blade tip root cross section, and y is that on the profile line of tip segment certain is put the chord length of the distance on vertical with blade tip root cross section and plane that comprise root cross section trailing edge point divided by blade tip root cross section; The B of described profile line, C, D part edge are provided with toothed segment (shown in Fig. 4 a, 4b, 4c), described toothed segment directly processes on tip segment, root between the adjacent sawtooth can directly link to each other, can not link to each other yet, the height of sawtooth is 2h, distance between the adjacent sawtooth tip is λ, and h/ λ is arbitrary value when infinite (comprises h/ λ convergence similar hair brush structure).Through the restriction and the optimization of the geometrical shape of above-mentioned tip segment to pneumatic equipment blades made, add the mate-assist of toothed segment, can reduce the intensity in the whirlpool that comes off of tip segment effectively, and then suppress the aerodynamic noise that causes by the whirlpool that comes off effectively.
The above only is preferred embodiment of the present utility model, and is in order to restriction the utility model, not all within spirit of the present utility model and principle, any modification of being made, is equal to replacement, improvement etc., all should be included within the scope of the present utility model.
Claims (8)
1. the pneumatic equipment blades made with decrease of noise functions comprises tip segment (11) and blade other parts (12), it is characterized in that,
Described tip segment (11) is 1.5 times of chord length of its root section along blade exhibition length upwards, chord length from the top of tip segment (11) to the cross section of its root increases gradually, the profile line of tip segment (11) comprises leading edge portion A, head portion B, transition portion C, reaches trailing edge part D, the B of described profile line, C, D part profile undulate;
Described leading edge portion A, head portion B, transition portion C, and the appearance curve of trailing edge part D satisfy following relationship respectively:
The appearance curve of leading edge portion A:
,
The appearance curve of head portion B:
,
The appearance curve of transition portion C:
,
The appearance curve of trailing edge part D:
Wherein, x is the chord length of the distance of on the profile line of tip segment certain root cross section of putting tip segment divided by blade tip root cross section, and y is that on the profile line of tip segment certain is put the chord length of the distance on vertical with blade tip root cross section and plane that comprise root cross section trailing edge point divided by blade tip root cross section;
The B of described profile line, C, D part edge are provided with toothed segment.
2. pneumatic equipment blades made according to claim 1 is characterized in that, described tip segment (11) and blade other parts (12) are independent respectively to be shaped, and the two mode by bonding combines.
3. pneumatic equipment blades made according to claim 1 is characterized in that, described tip segment (11) and blade other parts (12) are integrally formed.
4. according to each described pneumatic equipment blades made of claim 1 to 3, it is characterized in that described toothed segment directly processes on tip segment (11).
5. according to each described pneumatic equipment blades made of claim 1 to 3, it is characterized in that described toothed segment forms by pasting Saw blade at described tip segment (11).
6. according to each described pneumatic equipment blades made of claim 1 to 3, it is characterized in that the root between the adjacent sawtooth of described toothed segment directly links to each other or do not link to each other.
7. according to each described pneumatic equipment blades made of claim 1 to 3, it is characterized in that, also be provided with toothed segment on the trailing edge of described blade other parts (12).
8. pneumatic equipment blades made according to claim 6 is characterized in that, also is provided with toothed segment on the trailing edge of described blade other parts (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206723317U CN201943899U (en) | 2010-12-21 | 2010-12-21 | Wind machine blade with noise reduction function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206723317U CN201943899U (en) | 2010-12-21 | 2010-12-21 | Wind machine blade with noise reduction function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201943899U true CN201943899U (en) | 2011-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206723317U Expired - Lifetime CN201943899U (en) | 2010-12-21 | 2010-12-21 | Wind machine blade with noise reduction function |
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| CN (1) | CN201943899U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102003333A (en) * | 2010-12-21 | 2011-04-06 | 中国科学院工程热物理研究所 | Wind turbine blade with de-noising function |
| CN102606417A (en) * | 2012-03-19 | 2012-07-25 | 西安交通大学 | Blade structure of wind power generator with serrated blade apexes |
| CN105089925A (en) * | 2015-09-15 | 2015-11-25 | 韩万龙 | Flexible bionic feather band for lift augmentation and noise reduction of tail edge and blade tip of wind turbine blade |
| CN108603488A (en) * | 2016-02-12 | 2018-09-28 | Lm Wp 专利控股有限公司 | Zigzag posterior marginal shield for wind turbine blade |
-
2010
- 2010-12-21 CN CN2010206723317U patent/CN201943899U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102003333A (en) * | 2010-12-21 | 2011-04-06 | 中国科学院工程热物理研究所 | Wind turbine blade with de-noising function |
| CN102606417A (en) * | 2012-03-19 | 2012-07-25 | 西安交通大学 | Blade structure of wind power generator with serrated blade apexes |
| CN105089925A (en) * | 2015-09-15 | 2015-11-25 | 韩万龙 | Flexible bionic feather band for lift augmentation and noise reduction of tail edge and blade tip of wind turbine blade |
| CN108603488A (en) * | 2016-02-12 | 2018-09-28 | Lm Wp 专利控股有限公司 | Zigzag posterior marginal shield for wind turbine blade |
| CN108603488B (en) * | 2016-02-12 | 2019-07-30 | Lm Wp 专利控股有限公司 | Zigzag posterior marginal shield for wind turbine blade |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110824 Effective date of abandoning: 20120111 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20110824 Effective date of abandoning: 20120111 |