CN107893739A - Blade and wind power generating set - Google Patents
Blade and wind power generating set Download PDFInfo
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- CN107893739A CN107893739A CN201711350519.2A CN201711350519A CN107893739A CN 107893739 A CN107893739 A CN 107893739A CN 201711350519 A CN201711350519 A CN 201711350519A CN 107893739 A CN107893739 A CN 107893739A
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- noise reduction
- blade
- reduction unit
- trailing edge
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- 230000009467 reduction Effects 0.000 claims abstract description 163
- 239000000758 substrate Substances 0.000 claims description 51
- 230000007704 transition Effects 0.000 claims description 13
- 239000004576 sand Substances 0.000 claims description 3
- 238000009434 installation Methods 0.000 description 7
- 238000011144 upstream manufacturing Methods 0.000 description 6
- 230000008859 change Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000000875 corresponding effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2260/00—Function
- F05B2260/96—Preventing, counteracting or reducing vibration or noise
-
- 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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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Wind Motors (AREA)
Abstract
The invention discloses a kind of blade and wind power generating set, denoising device is installed in the trailing edges of the blade (1), the denoising device includes multiple noise reduction units (2), the noise reduction unit (2) includes windward side (21) and the lee face (22) that top edge is connected, and the windward side (21) and lee face (22) are tapered with extending to both lateral sides, so as to formed with two corners (24).The denoising device can be effectively reduced noise caused by blade operation.
Description
Technical field
The present invention relates to the blade noise reduction field of wind power generating set, and specifically, the present invention relates to one kind to have noise reduction
The blade of device and the wind power generating set comprising the blade.
Background technology
Increasing with the capacity of wind power generating set, the ability of fan blade capture wind energy is also increasingly stronger, simultaneously
Noise caused by fan blade is also increasing, and noise pollution is brought to environment.Therefore, it is necessary to noise reduction is carried out to blade.
In general, blade, which produces noise, is primarily due to the turbulent boundary layer of blade surface and after the blade of trailing edge part
Caused by the effect of edge facade.
At present, denoising device generally is installed in trailing edge to change direction and the frequency that boundary layer takes off whirlpool, so as to reduce
Correlated noise.But this denoising device has various shortcomings, noise reduction may not be realized fully.For example, by noise reduction
When device is arranged on trailing edge position, it is considered that the chord length of blade may be increased, cause blade loading to increase.In addition,
These denoising devices may only account for vane airfoil profile two-dimensional flow field property, in the de- whirlpool direction in trailing edge boundary layer and frequency
Aspect change effect is limited, thus reduces the noise reduction finally realized.
In addition, using it is multiple individually denoising devices carry out noise reduction when, it is necessary to separately installed each denoising device successively,
This causes the relatively complicated complexity of installation process, and installation difficulty is larger.
The content of the invention
According to an aspect of the present invention, there is provided a kind of blade, denoising device is installed in the trailing edges of the blade,
The denoising device includes multiple noise reduction units, and the noise reduction unit includes windward side and the lee face that top edge is connected, and
And the windward side and lee face are tapered with extending to both lateral sides, so as to formed with two corners.
Alternatively, the denoising device the blade it is tangential on be arranged on the most leading edge away from the blade distance it is big
In the position of 90% chord length.
Alternatively, the noise reduction unit is in crescent sand dune shape, and the noise reduction unit also includes basal surface, it is described windward
Face, the lee face and the basal surface are interconnected to form closure stereochemical structure, and the windward side is convex surface, described leeward
Face is concave surface, the intersection that the corners is formed between the windward side, the lee face and the basal surface.
Alternatively, the noise reduction unit is symmetrical relative to the median plane between two corners.
Alternatively, the multiple noise reduction unit is in contact with each other or is separated by pre- spacing according to the corners of adjacent noise reduction unit
From mode arrange that the preset distance is less than between two corners of the noise reduction unit twice of distance.
Alternatively, the noise reduction unit is located at the trailing edge facade inner side of the blade or a part for the noise reduction unit surpasses
Go out the trailing edge facade.
Alternatively, when a part for the noise reduction unit exceeds the trailing edge facade, the blade it is tangential on institute
State the 30% of the overall size of of length no more than noise reduction unit beyond the trailing edge facade of noise reduction unit.
Alternatively, the denoising device also includes substrate, and the multiple noise reduction unit is arranged on described by the substrate
On blade.
Alternatively, a part for the noise reduction unit exceeds the trailing edge facade of the blade, the basal surface in step-like,
Including the first sublist face, the second sublist face and the 3rd sublist face, the 3rd sublist face connects the first sublist face and second
Sublist face, first son are surface mounted on one in the suction side surface and pressure side surface of the blade, and described
Three sublist faces are bonded each other with the trailing edge facade of the blade, the second sublist face be in outside the blade and with the suction
Another smoothly transition in power side surface and pressure side surface.
Alternatively, the denoising device also includes substrate, and the first sublist face of the multiple noise reduction unit passes through the base
Plate is arranged on the blade.
Alternatively, the wedge shaped plate shape formula of the substrate, edge and the leaf of the remote noise reduction unit of the substrate
The surface smoothly transition of piece.
Alternatively, the substrate includes：Main part, wedge shaped plate shape formula, the multiple noise reduction unit pass through the main body
Portion is arranged on the blade, the trailing edge of the thickness of the main part along the blade to the direction of the leading edge of the blade by
It is decrescence small, the edge of the remote noise reduction unit of the main part and the surface smoothly transition of the blade, the main part
Flushed with the edge that the noise reduction unit is connected with the trailing edge facade；Filling part, downstream extend from the main part and
Fill the space between adjacent noise reduction unit, the upper surface smoothly transition of the upper surface of the filling part and the main part is simultaneously
And the corners of the noise reduction unit is gently extended to, and the lower surface of the filling part flushes with the second sublist face.
Alternatively, the substrate connection is between adjacent noise reduction unit, and fills the facing of adjacent noise reduction unit
Windward side between space, adjacent noise reduction unit corners contact or spaced a predetermined distance.
Alternatively, the intersecting lens of the median plane between the windward side and described two corners is relative to the basal surface
Angle be 10-50 degree.
Alternatively, the intersecting lens of the median plane between the lee face and described two corners is relative to the basal surface
Angle be 20-50 degree.
Alternatively, distance of the peak of the intersecting lens between the windward side and the lee face away from the basal surface is
2-30mm。
Alternatively, the distance between two corners of the noise reduction unit are 30-300mm.
According to another aspect of the present invention, there is provided a kind of wind power generating set, the wind power generating set include above-mentioned leaf
Piece.
The blade provided is provided with denoising device, and the denoising device can be assemblied in leaf with various suitable arrangements
The trailing edges of piece, it can effectively reduce the boundary layer at trailing edge facade, significantly decrease noise level caused by blade.
The structure of denoising device is simple, will not increase the chord length of blade, and is easy to manufacture and installs.When mounted, can lead to first
Cross and assemble all noise reduction units on substrate, be then assembled to together on blade again, or when manufacturing denoising device, can
Using noise reduction unit and substrate as integrally manufactured, so as to which it is disposably assembled on blade, so as to significantly simple
Change assembling process, and installation accuracy is provided.
Brief description of the drawings
Fig. 1 is the structural representation of blade according to an embodiment of the invention；
Fig. 2 is the dimensional structure diagram of the noise reduction unit of the denoising device shown in Fig. 1；
Fig. 3 is the schematic diagram of the airflow field around the noise reduction unit shown in Fig. 2；
Fig. 4 be Fig. 1 A-A to sectional view；
Fig. 5 is the scheme of installation that denoising device according to an embodiment of the invention is arranged on blade；
Fig. 6 is the scheme of installation that denoising device according to an embodiment of the invention is arranged on blade；
Fig. 7 is the scheme of installation that denoising device according to an embodiment of the invention is arranged on blade；
Fig. 8 is the structural representation of the denoising device shown in Fig. 7；
Fig. 9 is another structural representation of the denoising device shown in Fig. 7；
Figure 10 is the structural representation of the substrate shown in Fig. 9；
Figure 11 is the structural representation of denoising device according to an embodiment of the invention.
Description of reference numerals：
1：Blade, 11：Blade tip, 12：Blade root, 13：Pressure side surface, 14：Suction side surface, 15：Trailing edge, 16：Leading edge,
17：Trailing edge facade, 2：Noise reduction unit, 21：Windward side, 22：Lee face, 23：Basal surface, 231：First sublist face, 232：Second
Sublist face, 233：3rd sublist face；24：Corners, 3：Substrate, 31：Upper surface, 32：Lower surface, 33：Main part, 34：Filling
Portion, 35：Side surface.
Embodiment
In order that those skilled in the art can be better understood from the present invention, below in conjunction with the accompanying drawings to the specific reality of the present invention
Example is applied to be described in detail.
Referring to figs. 1 to Fig. 4, Fig. 1 is the schematic diagram of blade according to an embodiment of the invention, and Fig. 2 is the noise reduction shown in Fig. 1
The structural representation of the noise reduction unit of device, Fig. 3 are the schematic diagrames of the airflow field around the noise reduction unit shown in Fig. 2；Fig. 4 is figure
1 A-A to sectional view.
Generally, the blade 1 of wind power generating set includes blade tip 11 and the blade root 12 being connected with wheel hub, meanwhile, blade 1 also wraps
The pressure side surface 13 and suction side surface 14 for including leading edge 16 and trailing edge 15 and extending between leading edge 16 and trailing edge 15, such as scheme
Shown in 1.When wind power generating set is run, due to the turbulent boundary layer and trailing edge facade on the two surfaces of blade 1
17 act on and produce noise, and main positions caused by these noises are at the trailing edge 15 of blade 1.
According to an embodiment of the invention, be provided with denoising device on blade 1, with change blade 1 on the pressure side 13 or inhale
Boundary layer on power side surface 14 takes off direction and the frequency in whirlpool, so as to reduce noise.The denoising device is arranged on the trailing edge of blade 1
At 15, specifically, it is arranged at or near the trailing edge of blade 1, and the suction side surface 14 and/or on the pressure side of blade 1 can be located at
On surface 13.Specifically when mounted, denoising device can blade 1 it is tangential on be arranged on the most leading edge away from blade 1 be more than 90%
The opening position of chord length, so as to be arranged close to the opening position of the trailing edge of blade 1, noise reduction is realized with the airflow field changed herein.
Denoising device includes multiple noise reduction units 2.Fig. 2 shows the stereogram of single noise reduction unit 2.As shown in Fig. 2 drop
Unit 2 of making an uproar may include windward side 21 and lee face 22, and windward side 21 is connected and generally formed with the top edge of lee face 22
It is carinate, and windward side 21 and lee face 22 are tapered when direction extends laterally, so as to form two in the end that both connect
Individual corners 24.Here, the tangential vertical direction with blade 1 is laterally referred to.
In addition, noise reduction unit 2 can also further comprise basal surface 23, and these three surfaces are interconnected to form closure
3-D solid structure, generally in the sand dune shape of crescent, as shown in Figure 2.Noise reduction unit 2 provided by the present invention is simultaneously unlimited
In this shape, other suitable forms can also be used.Windward side 21 is the curved surface with certain protrusion degree, and lee face 22 is
Curved surface with certain recessed degree, basal surface 23 connect windward side 21 and lee face 22 in lower section.In addition, windward side 21 can also
It is plane or rough surface.Windward side 21 and lee face 22 are all from the upstream top of noise reduction unit 2 (that is, such as Fig. 3 institutes
The high order end shown) downstream extended with certain curvature, and basal surface 23 can be plane or adapt to the curved surface on the surface of blade 1,
These three surfaces close the position that two corners 24 to be formed are in most downstream, two of corners 24 equivalent to noise reduction unit 2
The wing, extend along airflow direction.
Noise reduction unit 2 can be symmetrical structure, for example, can be symmetrical relative to the median plane between two corners 24.Meet
The intersecting lens of median plane between wind face 21 and two corners 24 can be 10-50 degree relative to the angle of basal surface 23, example
Such as, it can be 30 degree or so, the intersecting lens of the median plane between lee face 22 and two corners 24 is relative to basal surface 23
Angle can be 20-50 degree, for instance, it may be preferable to which ground is 34 degree or so.Intersecting lens between windward side 21 and lee face 22 is most
Distance of the high point away from basal surface 23 can be that the distance between 2-30mm, two corners 24 of noise reduction unit 2 can be 30-
300mm。
In figure 3, from left to right, air-flow P blows to windward side 21 first in the direction of air-flow, then by the He of windward side 21
After intersecting lens between lee face 22, vortex tube can be formed at the downstream area of lee face 22 and negative pressuren zone may be formed,
As shown by the dotted line in fig. 3.The vortex tube is from air-breathing at the downstream area of basal surface 23, and as illustrated, air-flow in vortex tube
The flowing (under the orientation shown in Fig. 3, in orientation viewing from bottom to top) along clockwise direction, and on each section of vortex tube
Direction of rotation and vorticity intensity all same, simply the angular velocity of rotation corresponding to the big section of sectional area is small, and sectional area is small
Section corresponding to angular velocity of rotation it is big, therefore at two corners 24 of noise reduction unit 2, the sectional area of vortex tube tends to
In infinitesimal, angular velocity of rotation is intended to infinity, thus forms singular point effect, and this necessarily causes vortex tube to break here
Split, trigger exhaust and turbo-charger set phenomenon.Simultaneously as near middle position, the direction of vortex tube generally with airflow direction
Vertically, and near the position of corners 24, the direction of vortex tube is substantially parallel to airflow direction, therefore, in two wedge angles
Change close to 90 °, so, the side in two whirlpools of adjacent two noise reduction units occur for the direction of the vortex tube crushed at portion 24
To just on the contrary, so as to cancel out each other.Therefore, because getter action and the phase of vortex tube, vortex tube that noise reduction unit 2 is formed
The negative function that adjacent vortex tube occurs when broken so that the boundary layer near trailing edge facade 17 significantly diminishes, so as to reach
To the effect of noise reduction.
In specific assembling, as described above, denoising device can be arranged on the pressure side surface 13 and/or suction side of blade 1
On surface 14, i.e. can all it be arranged on pressure side surface 13 or in suction side surface 14, can also some of denoising devices
On pressure side surface 13, other denoising devices are arranged in suction side surface 14.For ease of description, in following reality
Applying in example will illustrate so that denoising device is arranged on pressure side surface 13 as an example.
As shown in figure 4, in one embodiment of the invention, the noise reduction unit 2 of denoising device is directly installed on the pressure side
At the trailing edge on surface 13, air-flow is flowed from right to left, and windward side 21 is in upstream position, and lee face 22 is under windward side 21
Trip, basal surface 23 is installed on pressure side surface 13, i.e. the shape of basal surface 23 can be with the pressure side surface 13 that is installed to
Part match.Basal surface 23 can be pasted onto on pressure side surface 13, or uses other suitable fixed forms.
Noise reduction unit 2 is arranged and is either arranged in a row or can exist each other in which can align at the trailing edge 15 of blade 1
The certain distance that is staggered on the direction of air-flow is arranged.For example, noise reduction unit 2 can be parallel relative to the trailing edge facade 17 of blade 1
Ground arrange, or some of noise reduction units 2 away from trailing edge facade 17 more closely, other noise reduction units 2 away from trailing edge facade 17 far,
Certainly, the distance away from trailing edge facade 17 needs suitably to determine, it is impossible to it is too remote, to avoid influenceing noise reduction.
Two adjacent noise reduction units 2 arrange in which can be in contact with each other, can also predetermined distance arrangement.For example,
In embodiment shown in Fig. 5, the corners 24 facing each other of adjacent noise reduction unit 2 extends in the trailing edge 15 of blade 1
Predetermined distance L on direction, preset distance L need also exist for suitably determining, it is impossible to set too big, for example, in blade 1
Trailing edge facade 17 extend direction on, preset distance L is smaller than the distance between two corners 24 of noise reduction unit 2 (i.e.,
The length of noise reduction unit 2) twice.In addition, the preset distance L that two neighboring noise reduction unit 2 is separated by can be differently configured from other two
Preset distance between individual adjacent noise reduction unit 2, that is to say, that noise reduction unit 2 can be equably on pressure side surface 13
Distribution, can also unevenly be distributed, and this can require specific design according to noise reduction.
Or in the embodiment shown in fig. 6, the corners 24 facing each other of adjacent noise reduction unit 2 is firm each other
Good contact, that is, very close to each other between the two corners 24.
It should be noted that the arrangement of noise reduction unit 2 can also use the combined mode of both the above mode, i.e. its
In some noise reduction units 2 can be separated by a certain distance, and other noise reduction units 2 can be in contact with each other.
On the other hand, the noise reduction unit 2 of denoising device can also be in the trailing edge facade 17 all in blade 1 in arrangement
Side, align or beyond trailing edge facade 17 with the trailing edge facade 17.Certainly, noise reduction unit 2 can also use these three arrangement sides
The mode of any combination in formula is arranged, that is, some noise reduction units 2 can be arranged in the inner side of trailing edge facade 17, some
Noise reduction unit 2 can align with trailing edge facade 17, and other noise reduction unit 2 can exceed trailing edge facade 17.Preferably, it is all
Noise reduction unit 2 can be at the same side of trailing edge facade 17.
Noise reduction unit 2 a part exceed trailing edge facade 17 in the case of, blade 1 it is tangential on, noise reduction unit 2
Beyond the 30% of the overall size of of length no more than noise reduction unit 2 of trailing edge facade 17, or the numerical value can also be more than 30%.
For example, as shown in Figures 4 to 6, noise reduction unit 2 is alignd with the trailing edge facade 17 of blade 1, that is, noise reduction unit 2
Corners 24 is alignd with trailing edge facade, so as to be arranged in a row arrangement as described above.
Or as shown in fig. 7, a part for noise reduction unit 2 exceeds trailing edge facade, in this case, the He of windward side 21
The shape of basal surface 23 changes relative to the embodiment in Fig. 4 to Fig. 6.Specifically, windward side 21 can be generally included in leaf
The part of the top of piece 1 and between the part at the rear of blade 1, the two parts at trailing edge facade formed with step.Meanwhile
Intersecting lens between lee face 22 and basal surface 23 is completely in the downstream of trailing edge facade 17, and basal surface 23 substantially divide into more
Section, including the first sublist face 231, the second sublist face 232 and the 3rd sublist face 233, these three sublist faces can generally be in each other
Step-like, the step is at the trailing edge facade 17 of blade 1.First sublist face 231 is arranged on the pressure side surface 13 of blade 1
On, and the second sublist face 232 is in trailing edge facade downstream and can be with the smoothly transition of suction side surface 14 or flushing, the 3rd son
Surface 233 is between the first sublist face 231 and the second sublist face 232 and can be close to surface at the trailing edge facade of blade, with
Just noise reduction unit 2 is arranged on blade 1 in a manner of one part is beyond the trailing edge facade of blade 1.
Each noise reduction unit 2 can be directly installed on the pressure side surface 13 of blade 1, as shown in figure 4, can also pass through
Miscellaneous part is arranged on pressure side surface 13, as shown in Figure 7.
On the basis of the embodiment above by reference to described by Fig. 1 to Fig. 6, denoising device further comprises substrate 3, noise reduction
Unit 2 can be arranged on the surface of blade 1 by the substrate 3.
, can installation base plate 3 no matter how noise reduction unit 2 is arranged and installed relative to the surface of blade 1.That is,
In the case that the noise reduction unit 2 that Fig. 1 is shown into Fig. 6 is in the inner side of trailing edge facade 17 or alignment, also can noise reduction unit 2 with
Installation base plate 3 between blade 1.Exceed in a part for noise reduction unit 2 as shown in Figure 7 in the embodiment of trailing edge facade 17, drop
The part of unit 2 of making an uproar is on substrate 3, and another part is located at outside blade 1.
In the figure 7, substrate 3 is arranged between the first sublist face 231 and pressure side surface 13.In this case, increasing
If during substrate 3, arrangement of the noise reduction unit 2 on the surface of blade 1 is had no effect on, still can be above with respect to Fig. 1 to Fig. 6 institutes
The various ways arrangement of description, only need to further load onto substrate 3 between each noise reduction unit 2 and blade 1.Because drop
Unit 2 of making an uproar has a variety of arrangements, can also be arranged with the arrangement being combined, therefore, according to arrangement not
Together, noise reduction unit 2 can be divided into it is multigroup, for example, can will in the same manner arrangement and noise reduction unit 2 close to each other be classified as one
Group, then this group of noise reduction unit can be installed using a substrate 3.Certainly, permit if all of the arrangement mode of noise reduction unit 2
Xu Shi, it can also use single substrate 3 that all noise reduction units 2 are arranged on blade 1.
A part for substrate 3 can be at the upstream of noise reduction unit 2.The lower surface 32 of substrate 3 is arranged on pressure side surface 13
On, for example, can be fixed by bonding or other suitable modes.Substrate 3 can generally in clapboard form, thickness along with gas
Flow direction in opposite direction to be gradually reduced, i.e. the sharp edge of clapboard is in most upstream, and the upper surface 31 of substrate 3 can
With the smoothly transition of pressure side surface 13, with avoid existing between substrate 3 and blade 1 it is sharp with reference to and influence the distribution of airflow field
And noise reduction, and upper surface 31 is all throughout smoothly transition, in the absence of wedge angle transition.
When denoising device is installed on blade 1, first all noise reduction units 2 can be assembled on substrate 3, then will
Both component formed is assembled on blade 1.In a preferred embodiment, can be using substrate 3 and noise reduction unit 2 as integrally entering
Row manufacture, so, in assembling, the operation for installing each noise reduction unit 2 successively can be omitted, so as to significantly simplify denoising device
Transport and assembling, and assembling when, it may also be ensured that the alignment between noise reduction unit 2 is (according to the side of being arranged so as to
If formula) relation, without artificial alignment when mounted, so as to can ensure that noise reduction.
Any suitable substrate form can be used.For example, the corners 24 of noise reduction unit 2 and trailing edge facade after mounting
17 alignment and entirely on the blade 1 when, substrate 3 can also be entirely on blade 1, and general rectangular clapboard
Form, the edge (or upstream edge) of the remote noise reduction unit 2 of substrate 3 and blade surface smoothly transition, and with noise reduction unit 2
The edge (or downstream edge) of connection can align with trailing edge facade 17.
When exceeding trailing edge facade 17 of noise reduction unit 2 after mounting, as shown in figure 8, what substrate 3 can be generally rectangular
Clapboard form.The edge (or downstream edge) being connected with noise reduction unit 2 of substrate 3 aligns with trailing edge facade 17, that is,
Say, substrate 3 is entirely on blade 1.It should be noted that, although the adjacent noise reduction unit 2 shown in Fig. 8 is separated by pre- spacing
From still, for the embodiment that adjacent noise reduction unit 2 is in contact with each other, it is possible to use the substrate 3 shown in Fig. 8.
In addition, as shown in figure 9, a part for substrate 3 is beyond trailing edge facade 17.Specifically, substrate 3 may include main body
Portion 33 and filling part 34, as shown in Figure 10.The shape of main part 33 can be similar to the substrate shape shown in Fig. 8, i.e. in drop
Make an uproar unit 2 the first sublist face 231 and pressure side surface 13 between, its thickness along with the trailing edge 15 from blade 1 to leading edge 16
Direction be gradually reduced, and the edge (or downstream edge) being connected with noise reduction unit 2 of main part 33 and trailing edge facade 17
Flush, the edge (or upstream edge) of the remote noise reduction unit 2 of main part 33 and upper surface smoothed out with pressure side surface 13
Cross, and lower surface Pasting is on pressure side surface 13.Filling part 34 downstream extends from main part 33 and fills adjacent drop
The space made an uproar between unit 2.The upper surface of filling part 34 and the upper surface smoothly transition of main part 33, and can downstream gently
Extension, the corners 24 of noise reduction unit 2 is ultimately extended to, so as to the space being filled up completely between adjacent noise reduction unit 2, and then
Avoid forming hole between blade 1 and two neighboring noise reduction unit 2 and reducing noise reduction.The lower surface of filling part 34 can be with
Second sublist face 232 of noise reduction unit 2 flushes.Main part 33 and filling part 34 are preferably integral structure.Have by setting
There is the substrate 3 of filling part 34, the airflow field around denoising device can be made more smooth, further reduce trailing edge facade 17
Place or the boundary layer at rear, strengthen noise reduction.It should be noted that, although the adjacent noise reduction unit 2 shown in Fig. 9 is each other
Contact, still, for the embodiment of the adjacent predetermined distance of noise reduction unit 2, it is possible to use the base shown in Fig. 9
Plate.
In addition, as shown in figure 11, substrate 3 is connected between adjacent noise reduction unit 2, and fills adjacent noise reduction unit 2
Facing windward side 21 between space.Specifically, the side surface 35 of substrate 3 is in adjacent noise reduction unit 2
Between intersecting lens between heart face and windward side 21, and side surface 35 can be plane.The upper surface 31 of substrate 3 is with noise reduction list
The windward side 21 of member 2 and the intersecting lens extension of lee face 22, or alignd with the intersecting lens.The lower surface 32 of substrate 3 can be with drop
The basal surface 23 of unit 2 of making an uproar extends in alignment.It should be noted that, although figure 11 illustrates adjacent noise reduction unit 2 that
This contact, and a part for noise reduction unit 2 exceed blade 1 trailing edge 15, but shown substrate 3 be equally applicable to it is adjacent
The predetermined distance of noise reduction unit 2 situation, be similarly adapted to the pressure side surface that noise reduction unit 2 is completely in blade 1
Situation on 13 (including with trailing edge facade align or on the inside of the trailing edge facade by the corners 24 of the most downstream of noise reduction unit 2
Both embodiments).
In addition, the size of the noise reduction unit 2 of denoising device can be not quite similar, for example, can be after the trailing edge 15 according to blade 1
Air-flow field distribution, by some noise reduction units 2 be sized to it is big, by some noise reduction units 2 be sized to it is smaller.
According to denoising device provided by the present invention, can be fit easily within the trailing edges of blade, and can be effective
Ground reduces the boundary layer at trailing edge facade, significantly decreases noise level caused by blade.Meanwhile by substrate 3, can be with
Significantly simplify the assembling of denoising device, there is provided operating efficiency.
In addition, according to an embodiment of the invention, additionally providing a kind of wind power generating set, the wind power generating set includes upper
Blade 1 is stated, above-mentioned denoising device can be installed on the blade 1, and similar noise reduction can be realized.
The embodiment of the present invention is described in detail above, although having show and described some implementations
Example, it will be understood by those skilled in the art that limiting the of the invention of its scope by claim and its equivalent not departing from
In the case of principle and spirit, these embodiments can be modified and perfect, these are changed and improved also should be in the present invention
Protection domain in.
Claims (18)
1. a kind of blade, it is characterised in that the trailing edge (15) in the blade (1) is nearby provided with denoising device, the noise reduction
Device includes multiple noise reduction units (2), and the noise reduction unit (2) includes windward side (21) and the lee face that top edge is connected
(22), and the windward side (21) and lee face (22) are tapered with extending to both lateral sides, so as to formed with two points
Corner (24).
2. blade according to claim 1, it is characterised in that tangential upper peace of the denoising device in the blade (1)
Distance mounted in the most leading edge away from the blade (1) is more than the position of 90% chord length.
3. blade according to claim 1, it is characterised in that the noise reduction unit (2) is in crescent sand dune shape, the drop
Unit (2) of making an uproar also includes basal surface (23), and the windward side (21), the lee face (22) mutually interconnect with the basal surface (23)
Connect and form closure stereochemical structure, the windward side (21) is convex surface, and the lee face (22) is concave surface, the corners (24)
The intersection formed between the windward side (21), the lee face (22) and the basal surface (23).
4. blade according to claim 1, it is characterised in that the noise reduction unit (2) is relative to two corners (24)
Between median plane be symmetrical.
5. blade according to claim 1, it is characterised in that the multiple noise reduction unit (2) is according to adjacent noise reduction list
The corners (24) of first (2) is in contact with each other or the mode of predetermined distance is arranged, the preset distance is less than the noise reduction list
Twice of distance between two corners (24) of first (2).
6. blade according to claim 1, it is characterised in that the noise reduction unit (2) is located at the trailing edge of the blade (1)
A part for facade (17) inner side or the noise reduction unit (2) exceeds the trailing edge facade (17).
7. blade according to claim 6, it is characterised in that the noise reduction unit (2) a part after described
During edge facade (17), in the length beyond the trailing edge facade (17) of the tangential noise reduction unit (2) of the blade (1)
No more than the 30% of the overall size of the noise reduction unit (2).
8. blade according to any one of claim 1 to 7, it is characterised in that the denoising device also includes substrate
(3), the multiple noise reduction unit (2) is arranged on the blade (1) by the substrate (3).
9. blade according to claim 3 a, it is characterised in that part for the noise reduction unit (2) exceeds the blade
(1) trailing edge facade (17), the basal surface (23) is in step-like, including the first sublist face (231), the second sublist face (232)
With the 3rd sublist face (233), the 3rd sublist face (233) connects the first sublist face (231) and the second sublist face
(232), the first sublist face (231) is arranged on one in the suction side surface (14) and pressure side surface (13) of the blade
On individual, the 3rd sublist face (233) is bonded each other with the trailing edge facade (17) of the blade (1), the second sublist face
(232) it is in outside the blade and was smoothed out with another in the suction side surface (14) and pressure side surface (13)
Cross.
10. blade according to claim 9, it is characterised in that the denoising device also includes substrate (3), the multiple
First sublist face (231) of noise reduction unit (2) is arranged on the blade (1) by the substrate (3).
11. blade according to claim 10, it is characterised in that the wedge shaped plate shape formula of substrate (3), the substrate
(3) edge of the remote noise reduction unit (2) and the surface smoothly transition of the blade (1).
12. blade according to claim 10, it is characterised in that the substrate (3) includes：
Main part (33), wedge shaped plate shape formula, the multiple noise reduction unit (2) are arranged on the leaf by the main part (33)
On piece (1), the trailing edge (15) of the thickness of the main part (33) along the blade (1) arrives the leading edge (16) of the blade (1)
Direction be gradually reduced, the surface at the edge and the blade (1) of the remote noise reduction unit (2) of the main part (33) is put down
Along transition, the main part (33) flushes with the edge that the noise reduction unit (2) is connected with the trailing edge facade (17)；
Filling part (34), downstream extend from the main part (33) and fill the space between adjacent noise reduction unit (2), institute
State the upper surface of filling part (34) and the upper surface smoothly transition of the main part (33) and gently extend to the noise reduction
The corners (24) of unit (2), and the lower surface of the filling part (34) flushes with the second sublist face (232).
13. blade according to claim 10, it is characterised in that the substrate (3) is connected to adjacent noise reduction unit (2)
Between, and fill the space between the facing windward side (21) of adjacent noise reduction unit (2), adjacent noise reduction unit (2)
Corners (24) contact or spaced a predetermined distance.
14. blade according to claim 3, it is characterised in that the windward side (21) and described two corners (24)
Between the intersecting lens of median plane relative to the angle of the basal surface (23) be 10-50 degree.
15. blade according to claim 3, it is characterised in that the lee face (22) and described two corners (24)
Between the intersecting lens of median plane relative to the angle of the basal surface (23) be 20-50 degree.
16. blade according to claim 3, it is characterised in that between the windward side (21) and the lee face (22)
Distance of the peak of intersecting lens away from the basal surface (23) be 2-30mm.
17. blade according to claim 1, it is characterised in that between two corners (24) of the noise reduction unit (2)
Distance be 30-300mm.
18. a kind of wind power generating set, it is characterised in that including the blade as any one of claim 1 to 17.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711350519.2A CN107893739A (en) | 2017-12-15 | 2017-12-15 | Blade and wind power generating set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711350519.2A CN107893739A (en) | 2017-12-15 | 2017-12-15 | Blade and wind power generating set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107893739A true CN107893739A (en) | 2018-04-10 |
Family
ID=61807953
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711350519.2A Pending CN107893739A (en) | 2017-12-15 | 2017-12-15 | Blade and wind power generating set |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107893739A (en) |
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|---|---|---|---|---|
| CN101324218A (en) * | 2007-05-31 | 2008-12-17 | 歌美飒创新技术公司 | Wind turbine blade with anti-noise devices |
| US20110142673A1 (en) * | 2010-06-23 | 2011-06-16 | General Electric Company | Wind turbine blades with aerodynamic vortex elements |
| CN102808725A (en) * | 2011-05-31 | 2012-12-05 | 通用电气公司 | Noise reducer for rotor blade in wind turbine |
| US20130129519A1 (en) * | 2010-08-10 | 2013-05-23 | Soeren E. Nielsen | Rotor blade element and method for improving the efficiency of a wind turbine rotor blade |
| WO2014198354A1 (en) * | 2013-06-10 | 2014-12-18 | Senvion Se | Fastening of vortex generators |
| US20170314530A1 (en) * | 2016-04-28 | 2017-11-02 | General Electric Company | Wind turbine blade with noise reducing micro boundary layer energizers |
| CN207609514U (en) * | 2017-12-15 | 2018-07-13 | 江苏金风科技有限公司 | Blade and wind power generating set |
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2017
- 2017-12-15 CN CN201711350519.2A patent/CN107893739A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101324218A (en) * | 2007-05-31 | 2008-12-17 | 歌美飒创新技术公司 | Wind turbine blade with anti-noise devices |
| US20110142673A1 (en) * | 2010-06-23 | 2011-06-16 | General Electric Company | Wind turbine blades with aerodynamic vortex elements |
| US20130129519A1 (en) * | 2010-08-10 | 2013-05-23 | Soeren E. Nielsen | Rotor blade element and method for improving the efficiency of a wind turbine rotor blade |
| CN102808725A (en) * | 2011-05-31 | 2012-12-05 | 通用电气公司 | Noise reducer for rotor blade in wind turbine |
| WO2014198354A1 (en) * | 2013-06-10 | 2014-12-18 | Senvion Se | Fastening of vortex generators |
| US20170314530A1 (en) * | 2016-04-28 | 2017-11-02 | General Electric Company | Wind turbine blade with noise reducing micro boundary layer energizers |
| CN207609514U (en) * | 2017-12-15 | 2018-07-13 | 江苏金风科技有限公司 | Blade and wind power generating set |
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