CN101929422B - The cowling of wind turbine - Google Patents
The cowling of wind turbine Download PDFInfo
- Publication number
- CN101929422B CN101929422B CN200910158421.6A CN200910158421A CN101929422B CN 101929422 B CN101929422 B CN 101929422B CN 200910158421 A CN200910158421 A CN 200910158421A CN 101929422 B CN101929422 B CN 101929422B
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- cowling
- wind turbine
- rotor blade
- hub
- front part
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- 238000007493 shaping process Methods 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000007634 remodeling Methods 0.000 description 1
Classifications
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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
Abstract
Present patent application relates to a kind of cowling of wind turbine, it is suitable for being arranged on the hub of described wind turbine, wherein at least one rotor blade is connected on described hub, wherein rotor blade has interior section and shaping exterior section, wherein cowling is suitable for the sizable part covering rotor blade interior section on wind direction, cowling has front part, and wherein front part is suitable for before the interior section of at least one rotor blade being arranged on operating wind turbine.In addition, the application relates to a kind of wind turbine comprising hub and be connected at least one rotor blade on hub, rotor blade has interior section and shaping exterior section, wind turbine comprises the cowling be arranged on hub further, wherein cowling is suitable for sizable part of covering internal part on wind direction, cowling has front part, and wherein front part is suitable for before the interior section of at least one rotor blade being arranged on operating wind turbine.
Description
Background of invention
Present patent application relates to a kind of cowling for wind turbine (spinner), and it is suitable for being arranged on the hub of wind turbine.In addition, it relates to a kind of wind turbine with cowling.Finally, it relates to a kind of method of the efficiency for improving existing wind turbine.
Usually, the rotor blade of wind turbine does not have good air mechanics contour at internal rotor section place.Air-flow in internal rotor section may not be used to produce power through the rotor of wind turbine.Therefore, not all process is all used to produce power by the kinetic energy of the wind in the inswept region of rotor blade.
Invention summary
In view of above content, provide a kind of cowling for wind turbine, this cowling is suitable for being arranged on the hub of described wind turbine, wherein at least one rotor blade is connected on described hub, wherein rotor blade has interior section and shaping exterior section, wherein cowling is suitable for sizable part of the interior section covering rotor blade on wind direction, cowling has front part, and wherein front part is suitable for before the cylindrical interior part of at least one rotor blade being arranged on operating wind turbine.
According to another aspect of present patent application, provide a kind of wind turbine, it comprises hub and is connected at least one rotor blade on hub, rotor blade has interior section and shaping exterior section, this wind turbine comprises the cowling be arranged on hub further, wherein cowling is suitable for sizable part of covering internal part on wind direction, cowling has front part, and wherein front part is suitable for before the cylindrical interior part of at least one rotor blade being arranged on operating wind turbine.
According to another aspect, provide a kind of method of the efficiency for improving the existing wind turbine with at least one rotor blade be connected on hub, this at least one rotor blade has interior section and shaping exterior section, the method comprises: be arranged on by cowling on hub, wherein cowling is suitable for sizable part of covering internal part on wind direction, cowling has front part, wherein front part is arranged on before the interior section of at least one rotor blade of operating wind turbine, wherein the rear end of front part has substantially level and smooth periphery.
According to dependent claims, specification and accompanying drawing, other side of the present invention, advantage and feature are apparent.
Accompanying drawing is sketched
In the remainder of the description, comprise the reference to accompanying drawing, more specifically set forth of the present invention to those of ordinary skill in the art complete and attainable open, comprise its optimal mode, wherein:
Fig. 1 shows the schematic diagram of wind turbine;
Fig. 2 shows another schematic diagram of an embodiment of the wind turbine according to present patent application;
Fig. 3 shows another schematic diagram of an embodiment of the wind turbine according to present patent application;
Fig. 4 shows the schematic elevational view of an embodiment of cowling;
Fig. 5 shows the schematic elevational view of another embodiment of cowling; And
Fig. 6 shows a kind of flow chart of the method for improving existing wind turbine engine efficiency.List of parts: 100 wind turbine 110 pylon 120 cabin 130 hub 140 blade 142 exterior section 144 interior section 150 cowling 150a cowling 150b cowling 150c cowling 152a front part 154a rear portion D diameter W wind direction X spin axis r1 inside radius r2 outer radius
Embodiment
Now in detail referring to multiple embodiment of the present invention, one or more examples of these embodiments in figure, will be illustrated.Each example all provides as to elaboration of the present invention, and is not intended to as limitation of the present invention.Such as, as an embodiment a part and to show or the feature that describes can be used for using in other embodiment or in conjunction with other embodiment, to produce another embodiment.It is intended that the present invention includes this amendment and modification.
In addition, name be called " multistage wind turbine rotor blade and in conjunction with the wind turbine of this rotor blade " (Multi-sectionwindturbinerotorbladesandwindturbinesincorp oratingthesame), the attorney docket of application on December 6th, 2007 is 225623 commonly assigned and the U.S. Patent application of CO-PENDING is combined in herein by reference and integrally.This patent application provide as rotor blade a part, the multistage blade with rectifying device.Present patent application provides guard shield or the rectifying device of the interior section of rotor blade, wherein guard shield is a part for cowling.
Fig. 1 shows wind turbine 100.Wind turbine 100 comprises the pylon 110 being provided with cabin 120.The generator (not shown) for generation of electric current is placed in cabin.Generator is connected on the hub 130 of the axle with general horizontal.Three rotor blades 140 are connected on hub.Rotor blade 140 and hub 130 form the rotor of wind turbine 100.Be in operation, due to the air mechanics contour on rotor blade 140, wind gives rotation on rotor.Therefore, rotor rotates around the rotor axis X of the general horizontal being in substantially parallel relationship to wind direction.Rotor drives generator, thus produces electric energy.Therefore, the kinetic energy of wind is converted into electric energy.
As above, backward, below with rear portion etc. relative adjective relative to run in the relevant wind direction of the wind turbine of (namely when wind turbine produces electric energy) define.This just means that wind flows to rear end from the front end of wind turbine.When wind turbine produces electric energy, term is axial or radial relevant with the rotor axis X of hub.Therefore, rotor axis X is in substantially parallel relationship to wind direction.
In fig. 2, the rough schematic view of the wind turbine of an embodiment according to present patent application is shown.Identical reference number corresponds to the identical entity in such as Fig. 1.For simplicity, only show a part for rotor blade 140.Rotor blade 140 has outer sections 142 and interior zone 144.Outside and inside uses relative to hub 130.Therefore, in fig. 2, the outer sections 142 of rotor blade 140 is at the radial outside of interior zone 144.The interior zone of rotor blade 140 or interior section have the shape of general cylindrical in a typical embodiment, and are connected on hub 130.In an exemplary embodiment, rotor blade 140 can around its fore-aft axis, to regulate tilt angle.In order to this object, leaning device is positioned in the cabin 120 of hub 130 and/or wind turbine.Outer sections or the part 142 of rotor blade have aerofoil shaped, thus make outer sections also can be called as profiled section or the shaping exterior section 142 of rotor blade 140.From with hub be connected to outer sections 142 (being the blade end to rotor blade 140 another exemplary embodiments of present patent application), the front end of rotor blade 140 is normally straight.Therefore, leading edge 146 (namely rotor blade aweather or edge above) define disk flat substantially at the run duration (when namely rotating around axis X when hub 130 and rotor blade 140) of wind turbine.Therefore, roughly at profiled section section start, namely when from viewed from the hub side of rotor blade 140 to during blade end in fig. 2 shown in embodiment's rotor blade alee raised position, the outer end of interior cylindrical section 144 defines circle around axis X.
Before rotor blade 140 (i.e. windward), the cowling 150 according to present patent application is placed symmetrically about spin axis X.Cowling 150 can be connected on hub 130, or be connected to subsequently be arranged on wind turbine 100 hub on existing little cowling (not shown) on.In the case of the latter, cowling 150 covers little cowling.Therefore, cowling 150 can be the nose cone of hub 130.In a typical embodiment, if be arranged on wind turbine 100, cowling 150 is not only placed symmetrically about spin axis X, but also symmetrical about spin axis X.Cowling 150 can have paraboloidal shape or hemispheric external shape.In addition, cowling 150 can comprise for being fixed on hub 130 by cowling 150 or being fixed to the connector on existing little cowling.Therefore, cowling 150 according to the present invention can be arranged on existing wind turbine.In the shaping wind in guiding hub 130 or cabin 120 being guided to rotor blade 140 according to the cowling 150 of present patent application or outer sections 142.Therefore, the kinetic energy of the wind of guiding hub 130 is also used, to convert thereof into electric energy.
For this purpose, cowling has maximum outside diameter D before rotor blade 140, and it corresponds essentially to the diameter of a circle limited by the outer end of interior cylindrical section 144 when wind turbine 100 runs.Maximum outside diameter D also can be greater than this circle slightly.Therefore, the wind in guiding hub 130 and cabin 120 is directed in the outer sections 142 of rotor blade 140 along cowling 150.
A part for the cowling of the interior section 144 of rotor blade 140 (be especially positioned at before) is positioned at before rotor blade 140 according to the front part of the cowling of present patent application.In the case of figure 2, cowling 150 only comprises front part.
In an alternative embodiment as shown in fig. 3, the identical reference number of identical feature indicates.Wind turbine 100 has the cowling different from Fig. 2.Cowling 150a according to Fig. 3 has front section 152a and back section 154a.Front section 152a is formed according to the principle identical with the cowling 150 described about Fig. 2.Therefore, it can have the shape of spherical segment or paraboloidal shape, and it has the maximum outside diameter D being about the diameter of a circle limited by the outer end of interior cylindrical section 144 when wind turbine 100 runs.
The back section 154a of cowling 150a extends along the rear extreme direction in cabin 120 from front section 152a (especially from the rear end of front section 152a).Back section 154a can have general cylindrical shape maybe can have the diameter slightly diminished along its direction to the back-end.In the case of the latter, back section 154a can have conical shape.Section 154a closes the hub 130 of wind turbine backward.Its (columniform) interior zone 144 being rotor blade 140 only provides the breach of substantial circular.Under any circumstance, the back section 154a of cowling 150a is formed as making the back section 154a of the wing outer sections 142 of rotor blade 140 not contact rectification cover 150a under any tilt angle of rotor blade 140.Therefore, cowling 150a is suitable for providing low-drag, and is suitable for wind to guide in the wing outer sections 142 of rotor blade 140.
Can have cabin 120 about the embodiment described in Fig. 2 and 3, it has the external shape being suitable for corresponding cowling.Cabin 120, especially its aweather or part above, the shape of paraboloidal shape can be had at least in part.Therefore, cabin 120 is greater than the external diameter of the rear end in cabin at the external diameter at its front end place.In a typical embodiment, cabin has circular section at its front end place, and this circular section has roughly identical with the diameter of the outer end of interior cylindrical section 144 when wind turbine 100 runs or slightly less than this diameter diameter.In addition, it can be sized to make the aerofoil profile outer sections 142 of rotor blade 140 can not contact cabin 120.Therefore, in a specific embodiment of present patent application, the front end in cabin has the diameter less than the maximum outside diameter D of cowling 150,150a.In an exemplary embodiment, external shape is suitable for making the laminar flow of wind to walk around cowling and cabin.Therefore, such as in the embodiment shown in fig. 3, what wind turbine 100 provided the external shape in cabin 120 seamlessly transits front and rear part section 143a.
When cabin has the form of cuboid shape, the part through special remodeling can be installed on the cabin 120 of rectangular shape, as Fig. 3 schematically shows.Therefore, all exterior parts, namely according to the cowling of present patent application with can be arranged on existing wind turbine 100 for the cuboid shape housing in cabin.
Fig. 4 shows the front view of an embodiment in front view with round-shaped cowling 150c.Cowling 150b can have the form of paraboloidal shape or the form of spherical segment in this case.As shown in this embodiment, the interior section 144 of the general cylindrical of blade 140 is properly covered in the initial scan on wind direction.In certain embodiments, only sizable part of interior section 144 can be covered on wind direction by cowling 150b.Sizable part of interior section can be 50% to 100%, 75% to 100% of the total length of Inner cylindrical section 144, or 90% to 100%.The total length of interior section 144 is generally from for rotor blade 140 being connected to the distance of the flange connector hub 130 to the starting point of the aerofoil profile of rotor blade or shaped portion 142.
In another embodiment of cowling, as shown in Figure 5, cowling 150c can not have circular shape in front view.In front view, periphery changes between these two radiuses of exradius r2 and inner circle radius r1.The diameter D set forth about above-mentioned accompanying drawing may correspond in D=2 × r2.Radius r 2 is chosen as the sizable part making cowling 150c cover the cylindrical interior part 144 of rotor blade 140.In one embodiment, inner circle radius r1 may be selected to be and makes cowling 150c substantially cover cabin 120 on wind direction.Exradius is used for the circumferential position of rotor blade 140.In addition, in a specific embodiment, in the front view of cowling 150c, between exradius r2 and inner circle radius r1, there is level and smooth transition, as shown in Figure 5.Therefore, cowling 150c has waveform outer periphery.Thus, do not exist strong flow point from, and strong turbulent flow can not be produced due to the unexpected transition between exradius r2 and inner circle radius r1.
In an exemplary embodiments of the present invention, the rear end of the front part of cowling has substantially level and smooth periphery.In another embodiment, the rear end of front part can have level and smooth external frame.What which results in cowling more (meets) aerodynamic shape, and result in less turbulent flow.This can be used for the cowling shown in Fig. 1 to 5.
Show a kind of method of the efficiency for improving existing wind turbine in figure 6.In a first step, cowling is arranged on hub.Cowling can be above-described cowling one of them.In the next step, shell is arranged on cabin.As already described above, shell can be suitable for the form of cowling and can have the shape of paraboloidal shape.In another embodiment of this method, first shell is arranged on cabin, then cowling is arranged on hub.
Therefore, increase the size of cowling, or in other words, before cowling, forming board is installed, the air impacting wind turbine at internal rotor diameter place will be directed on shaping rotor blade section, and therefore will increase the energy capture of wind turbine.In a typical embodiment of present patent application, the outside dimensions in cabin can be suitable for cowling, to improve energy capture, and is suitable for avoiding at defluent distinguished and admirable middle generation whirlpool.Therefore, owing to being directed on shaping rotor blade section at the air-flow at inner rotator diameter place, so energy capture improves, and energy loss is less.
Cowling can be made up of any suitable material, includes but not limited to carbon fiber and/or other structural material.
This written explanation employs the example that comprises optimal mode to open the present invention, but also makes any person skilled in the art can manufacture and use the present invention.Although describe the present invention about multiple specific embodiment, those skilled in the art will recognize that, the present invention is implemented in the amendment in the spirit and scope of available claim.Especially, the feature of the mutual non-exclusionism of above-described embodiment can be combined with each other.Of the present inventionly the scope of granted patent can be defined by the claims, and other example that those skilled in the art expect can be comprised.If other such example has the structural element as broad as long with the literal language of claim, if or they comprise the equivalent structure element not having substantial differences with the literal language of claim, so these other examples intention is within the scope of claims.
Claims (7)
1. the cowling (150 being suitable for being arranged on the hub of described wind turbine for wind turbine (100), 150a, 150b, 150c), wherein at least one rotor blade (140) is connected on described hub (130), wherein said rotor blade has interior section (144) and shaping exterior section (142), the interior section of wherein said rotor blade is rectified cover and fully covers on wind direction, described cowling has front part (150, 152a), wherein said front part is suitable for before the interior section of at least one rotor blade being arranged on operating described wind turbine, the rear end of the front part of described cowling has the periphery of waviness substantially, wherein at least one peak portion is suitable for being arranged on before the interior section of at least one rotor blade described.
2. cowling according to claim 1, it is characterized in that, described cowling also has rear portion (154a), and described rear portion is suitable for around described hub and has the breach of each cylindrical interior part of the rotor blade corresponding to described wind turbine.
3. the wind turbine (100) comprising hub (130) and be connected at least one rotor blade (140) on described hub, described rotor blade has interior section (144) and shaping exterior section (142), described wind turbine also comprises the cowling (150 be arranged on described hub, 150a, 150b, 150c), the interior section of wherein said rotor blade is rectified cover and fully covers on wind direction, described cowling has front part (150, 152a), wherein said front part is suitable for before the interior section of at least one rotor blade being arranged on operating described wind turbine, the rear end of wherein said front part has substantially level and smooth periphery, the rear end of the front part of described cowling has the periphery of waviness substantially, wherein at least one peak portion is suitable for being arranged on before the interior section of at least one rotor blade described.
4. wind turbine according to claim 3, it is characterized in that, described cowling (150a) also comprises rear portion (154a), and described rear portion is suitable for around described hub (150) and has the breach of the cylindrical interior part (144) corresponding to described rotor blade (140).
5. wind turbine according to claim 4, is characterized in that, described rear portion (154a) has the diameter corresponding with the minimum diameter of the rear end of described front part (152a).
6. the wind turbine any one of claim 3 to 5 described in claim, it is characterized in that, described wind turbine also comprises cabin (120), described hub (130) is connected to described cabin, the shell in wherein said cabin (120) has the shape of paraboloidal shape substantially, and the radial diameter of the front end in described cabin is greater than the radial diameter to the back-end in described cabin.
7. wind turbine according to claim 6, is characterized in that, the radial outer diameter of the front end in described cabin is less than the minimum diameter of the rear end of the front part of described cowling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910158421.6A CN101929422B (en) | 2009-06-26 | 2009-06-26 | The cowling of wind turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910158421.6A CN101929422B (en) | 2009-06-26 | 2009-06-26 | The cowling of wind turbine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101929422A CN101929422A (en) | 2010-12-29 |
| CN101929422B true CN101929422B (en) | 2015-11-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910158421.6A Active CN101929422B (en) | 2009-06-26 | 2009-06-26 | The cowling of wind turbine |
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| Country | Link |
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| CN (1) | CN101929422B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1269869A (en) * | 1997-09-04 | 2000-10-11 | Lm玻璃纤维有限公司 | Windmill rotor and wing blades therefor |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6800956B2 (en) * | 2002-01-30 | 2004-10-05 | Lexington Bartlett | Wind power system |
| ITTO20020908A1 (en) * | 2002-10-17 | 2004-04-18 | Lorenzo Battisti | ANTI-ICE SYSTEM FOR WIND SYSTEMS. |
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2009
- 2009-06-26 CN CN200910158421.6A patent/CN101929422B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1269869A (en) * | 1997-09-04 | 2000-10-11 | Lm玻璃纤维有限公司 | Windmill rotor and wing blades therefor |
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| Publication number | Publication date |
|---|---|
| CN101929422A (en) | 2010-12-29 |
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Effective date of registration: 20240111 Address after: Barcelona, Spain Patentee after: Ge renewable energy Spain Ltd. Address before: New York, United States Patentee before: General Electric Co. |