CN206129492U - Edge of a knife shape wind turbine blades - Google Patents
Edge of a knife shape wind turbine blades Download PDFInfo
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- CN206129492U CN206129492U CN201620928473.2U CN201620928473U CN206129492U CN 206129492 U CN206129492 U CN 206129492U CN 201620928473 U CN201620928473 U CN 201620928473U CN 206129492 U CN206129492 U CN 206129492U
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- airfoil
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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
The utility model discloses an edge of a knife shape wind turbine blades belongs to wind energy utilization technical field. The blade comprises blade wing section and blade root two parts, and the three dimensional structure on blade wing section part surface is slipped by ten wing section face wing section curves and a space feature wing section point continuous light and crosses the formation, every wing section face wing section curve comprises pressure face curve and suction surface curve respectively, definition Z direction is leaf exhibition direction, and the face of perpendicular Z direction is the XOY plane, the spatial position face that first wing section face was located is Z=0's space face, and the reason point is three -dimensional origin of coordinate in face of the first wing section, line between each wing section face curve leading edge point and trailing edge point is the chord length, and the chord length is the torsional angle with the contained angle of X coordinate betweencenters in the XOY plane, and clockwise is the torsional angle forward. The utility model discloses the apex of blade can improve the availability of blade to the wind energy for edge of a knife shape structure to make the blade in the formation and the growth in broken apex whirlpool effectively of rotatory in -process, effective low rotational noise of falling the blade.
Description
Technical field
This utility model is related to a kind of pneumatic equipment bladess, and in particular to a kind of blade tip is the wind energy conversion system leaf of similar knife edge structure
Piece, belongs to technical field of wind energy utilization.
Background technology
Wind energy conversion system is to draw wind energy by wind wheel blade, and then mechanical energy is converted into the device of electric energy.Wind wheel is wind-force
The power part of machine-operated key, decides the efficiency for drawing wind energy.Wind wheel is made up of blade, wheel hub and axle, and electromotor passes through main shaft
Realize being connected with the axle of wind wheel, effect is that the mechanical energy that wind wheel is exported is converted into electric energy and is exported.As can be seen here, the leaf of wind wheel
Piece decides the wind energy utilization of wind energy conversion system.And pneumatic equipment bladess are made up of blade aerofoil portion and blade root two parts, blade profile
Type part-structure decides that the aeroperformance of wind wheel is good and bad, and leaf root part mainly undertakes the connection of blade aerofoil portion and wheel hub,
Play a part of blade support and positioning.
The architectural source of conventional wind machine vane airfoil profile causes conventional wind wing blades in use in aviation aerofoil profile
There is following key technology defect：
1st, near blade root, airfoil is roomy, causes blade threshold wind velocity to increase, and wind speed effectively utilizes scope narrows, wind energy profit
Declined with rate.Roomy airfoil structure, will cause blade total quality to increase, the moment of inertia that wind energy conversion system is overcome needed for starting
Increase, the minimum wind speed increase needed for causing blade to start, wind speed effectively utilizes scope narrow；Ask in view of safety simultaneously
Topic, the increase of leaf quality will cause under identical arrives stream wind speed, and the design speed of blade is decreased obviously, and then causes wind-force
Machine effective output declines, and wind energy utilization declines；On the other hand, during roomy airfoil structure will cause blade rotary course
The blade center whirlpool vorticity increase of generation and whirlpool affect diffusion zone to increase, so as to cause blade energy loss to increase, blade
Wind energy utilization declines；
2nd, cause blade tip acoustic radiation larger mostly with certain thickness airfoil structure at blade tip, wind energy utilization compared with
It is low.Non-streaming linear structure at blade tip, produces stronger tip vortex, and then produces stronger rotation and make an uproar in causing blade rotary course
Sound and larger energy loss, so as to cause, wind energy conversion system rotational noise is high and wind energy utilization is relatively low；Partial blade is in solution
Problem being stated, tip vane being installed additional in leaf tip, though the generation and diffusion of tip vortex can be improved to a certain extent, tip vane is simultaneously
Blades body construction, easily comes off from blade tip in use.
The presence of problem above, seriously governs the development process of the effectively utilizes and wind energy conversion system industry of wind energy.
Utility model content
In view of this, this utility model provides a kind of knife edge shape pneumatic equipment bladess, middle part of blade airfoil is relatively roomy,
Prominent, near leaf root part airfoil width in gradually tapering up profile, blade tip is knife edge shape structure, and this kind of version can have
Effect largely reduces blade profile size while lifting blade wind energy utilization, and blade can be made to have in rotary course
The generation and growth of tip vortex are crushed effect, so as to the aerodynamic noise for effectively reducing producing in blade rotary course.
In order to solve above-mentioned technical problem, what this utility model was realized in：A kind of knife edge shape pneumatic equipment bladess, by leaf
Piece aerofoil profile and blade root two parts composition, the three dimensional structure on blade aerofoil portion surface is by ten airfoil Curve of wing and one
The transition of space characteristics aerofoil profile point continuous and derivable is generated；Described each airfoil Curve of wing is respectively by pressure surface curve and suction surface
Curve is constituted；It is that blade and blade opens up direction to define Z-direction, and the face in vertical Z direction is XOY plane；Space residing for first airfoil
Surface of position for Z=0 space face, the first airfoil leading edge point be three-dimensional coordinate origin (0,0,0)；Each aerofoil profile surface curve leading edge point
It is chord length with the line between trailing edge point, chord length is torsional angle with the angle of X-coordinate between centers in the XOY plane, is to turn round clockwise
Angle is positive；
Described ten airfoil pressure surface curves and the corresponding coordinate figure of suction surface curve are as follows：
First airfoil Curve of wing coordinate (Z coordinate is 0mm)
Second airfoil Curve of wing coordinate (Z coordinate is 94.5mm)
3rd airfoil Curve of wing coordinate (Z coordinate is 189mm)
4th airfoil Curve of wing coordinate (Z coordinate is 283.5mm)
5th airfoil Curve of wing coordinate (Z coordinate is 378mm)
6th airfoil Curve of wing coordinate (Z coordinate is 472.5mm)
7th airfoil Curve of wing coordinate (Z coordinate is 567mm)
8th airfoil Curve of wing coordinate (Z coordinate is 661.5mm)
9th airfoil Curve of wing coordinate (Z coordinate is 756mm)
Tenth airfoil Curve of wing coordinate (Z coordinate is 803.25mm)
The space characteristics aerofoil profile point coordinates is (0mm, 0mm, 850mm)；
Ten feature airfoil Curve of wing chord lengths and torsional angle are as follows：
| Sequence number | Chord length (mm) | Torsional angle (°) | Sequence number | Chord length (mm) | Torsional angle (°) |
| 1st aerofoil profile surface curve | 99.64 | -27.8° | 6th aerofoil profile surface curve | 134.87 | -6.1° |
| 2nd aerofoil profile surface curve | 131.71 | -19.3° | 7th aerofoil profile surface curve | 109.62 | -5° |
| 3rd aerofoil profile surface curve | 169.69 | -13.7° | 8th aerofoil profile surface curve | 84.38 | -3.74° |
| 4th aerofoil profile surface curve | 185.22 | -10° | 9th aerofoil profile surface curve | 59.13 | -1.7° |
| 5th aerofoil profile surface curve | 159.98 | -7.5° | 10th aerofoil profile surface curve | 43.33 | -0.1° |
The blade root is made up of canned paragraph 13 and changeover portion 12, and canned paragraph is rectangular configuration, is machined with Y direction thereon
Bolt hole, for being fixedly connected with wind turbine hub, changeover portion is connected first wing of section and blade aerofoil portion bolt hole
Type face.
Further, a length of 80mm of the canned paragraph, a width of 94mm, a height of 47mm, the changeover portion is by the first aerofoil profile
Surface curve and canned paragraph end face (94mm × 47mm) generate transition section structure body by setting-out curve, and transition section length is 70mm.
Specifically technique is realized in production to blade, can be by above-mentioned ten feature airfoil Curve of wing and a space characteristics wing
Type point practical structures and the definition connection of three dimensions relative position relation smoothly transit and generate the processing mold of blade profile structure,
And then realize the physical treatment of blade for example, by techniques such as mold injections, or by blade aerofoil portion and leaf root part spatial point
Data import 3D printer and generate threedimensional model, and then directly print integral blade.
Beneficial effect：
1) blade possesses low threshold wind velocity.For the threshold wind velocity for reducing blade as far as possible, the application blade is in structure
With following characteristics：A, blade leaf central part of the acting with important function is set up separately and be calculated as wide width wing type version, with as far as possible
Increase staring torque, reduces the threshold wind velocity of blade；B, blade material are made up of carbon fiber, carbon fiber light weight and rigidity, toughness
It is larger, the quality of blade can be largely reduced under conditions of blade operation mechanical strength and fatigue damage is ensured, with to the greatest extent
The activated by inertia moment of resistance of blade may be reduced；At c, the little blade root of capacity of doing work to blade, airfoil structure is using gradually
The form of contraction, to reduce blade profile size, reduces leaf quality, reduces the activated by inertia moment of resistance of blade.Jing is tentatively tried
Test, the blade threshold wind velocity is less than 3m/s, belongs to low threshold wind velocity type wind energy conversion system, the utilization to low velocity wind energy has applicable well
Property.
2) high wind energy utilization.The application vane airfoil profile structure is specifically designed for distributed little using foline-momentum theory
Type wind energy conversion system and develop, blade has good structure cleanliness and aerodynamic performance.Design blade is combined into into three
Blade wind wheel, Jing numerical simulations, wind wheel under blade design operating mode (specified arrives stream wind speed 10m/s, 560 revs/min of rated speed)
Wind energy utilization Cp values are more than 44.5%, belong to high aerodynamic performance wind turbine blade.
3) low rotary radiation noise.On the one hand：The application blade pointedly blade tip position using similar to
The version of knife edge tip, vane nose portion can suppress the generation of tip vortex well, such that it is able to largely drop
The radiated noise of low blades；Meanwhile, vane nose portion is structure as a whole with blade, and rigidity is larger, therefore can avoid vane nose
Portion is such as installed by the caducous danger of the additional additional component such as winglet.On the other hand：The application blade root nearby adopt by airfoil structure
With the form gradually shunk, blade center vortices breakdown caused by wide leaf and root structure is largely reduced, so as to largely
On reduce the grade of blade rotary radiation noise, Jing numerical simulations, under declared working condition, this kind of version can more same diameter
NACA4415 airfoil fan wind wheels noise level reduces by more than 5 decibels.
Description of the drawings
Fig. 1 is the distribution of of the present utility model ten airfoil Curve of wing and space characteristics aerofoil profile point on blade
Schematic diagram；
Fig. 2 is contour structures schematic diagram of the present utility model；
Fig. 3 is leaf characteristic airfoil Curve of wing outline figure of the present utility model；
Fig. 4 is the profile diagram of of the present utility model ten feature airfoil Curve of wing.
Wherein：The 1st aerofoil profile surface curves of 1-；The 2nd aerofoil profile surface curves of 2-；The 3rd aerofoil profile surface curves of 3-；The 4th aerofoil profile surface curves of 4-；
The 5th aerofoil profile surface curves of 5-；The 6th aerofoil profile surface curves of 6-；The 7th aerofoil profile surface curves of 7-；The 8th aerofoil profile surface curves of 8-；The 9th airfoils of 9- are bent
Line；The 10th aerofoil profile surface curves of 10-；11- space characteristics aerofoil profile point；12- changeover portions；13- canned paragraphs；14- bolts hole.
Specific embodiment
Develop simultaneously embodiment below in conjunction with the accompanying drawings, and this utility model is described in detail.
As shown in Figure 1, knife edge shape pneumatic equipment bladess of the present utility model are made up of vane airfoil profile and blade root two parts, leaf
The three dimensional structure on piece airfoil section surface is by ten airfoil Curve of wing and 11 continuous and derivable of space characteristics aerofoil profile point
Transition is generated；Described each airfoil Curve of wing is made up of pressure surface curve and suction surface curve respectively；Such as the seat in accompanying drawing 2
Shown in mark system, it is that blade and blade opens up direction to define Z-direction, and the face in vertical Z direction is XOY plane；Space residing for first airfoil
Surface of position for Z=0 space face, the first airfoil leading edge point be three-dimensional coordinate origin (0,0,0)；Each aerofoil profile surface curve leading edge point
It is chord length with the line between trailing edge point, chord length is torsional angle with the angle of X-coordinate between centers in the XOY plane, is to turn round clockwise
Angle is positive；
Described ten airfoil pressure surface curves and the corresponding coordinate figure of suction surface curve are as follows：
First airfoil Curve of wing coordinate (Z coordinate is 0mm)
Second airfoil Curve of wing coordinate (Z coordinate is 94.5mm)
3rd airfoil Curve of wing coordinate (Z coordinate is 189mm)
4th airfoil Curve of wing coordinate (Z coordinate is 283.5mm)
5th airfoil Curve of wing coordinate (Z coordinate is 378mm)
6th airfoil Curve of wing coordinate (Z coordinate is 472.5mm)
7th airfoil Curve of wing coordinate (Z coordinate is 567mm)
8th airfoil Curve of wing coordinate (Z coordinate is 661.5mm)
9th airfoil Curve of wing coordinate (Z coordinate is 756mm)
Tenth airfoil Curve of wing coordinate (Z coordinate is 803.25mm)
The space characteristics aerofoil profile point coordinates is (0mm, 0mm, 850mm)；
Ten feature airfoil Curve of wing chord lengths and torsional angle are as follows：
| Sequence number | Chord length (mm) | Torsional angle (°) | Sequence number | Chord length (mm) | Torsional angle (°) |
| 1st aerofoil profile surface curve | 99.64 | -27.8° | 6th aerofoil profile surface curve | 134.87 | -6.1° |
| 2nd aerofoil profile surface curve | 131.71 | -19.3° | 7th aerofoil profile surface curve | 109.62 | -5° |
| 3rd aerofoil profile surface curve | 169.69 | -13.7° | 8th aerofoil profile surface curve | 84.38 | -3.74° |
| 4th aerofoil profile surface curve | 185.22 | -10° | 9th aerofoil profile surface curve | 59.13 | -1.7° |
| 5th aerofoil profile surface curve | 159.98 | -7.5° | 10th aerofoil profile surface curve | 43.33 | -0.1° |
The blade root is made up of canned paragraph 13 and changeover portion 12, and canned paragraph is rectangular configuration, is machined with Y direction thereon
Bolt hole, for being fixedly connected with wind turbine hub, changeover portion is connected first wing of section and blade aerofoil portion bolt hole
Type face.
A length of 80mm of the canned paragraph, a width of 94mm, a height of 47mm, the changeover portion is by the first aerofoil profile surface curve and admittedly
Determine section end face (94mm × 47mm) and transition section structure body is generated by setting-out curve, transition section length is 70mm.
Ten feature airfoil Curve of wing press sequence of positions arrangement in accompanying drawing 1, with 10 feature airfoil Curve of wing
And on the basis of a space characteristics aerofoil profile point, smoothly transit generation blade aerofoil portion, you can draws or processes vane airfoil profile
Part-structure.Or it is overall with 1 according to ten feature airfoil Curve of wing of accompanying drawing 4:1 it is scaling for actual size, and
Carry out after Curve of wing torsion by each feature airfoil torsional angle, can also obtain ten feature airfoils three-dimensionals for making blade mold
Space structure.
The wind wheel is made up of three blades, and blade material is carbon fiber.
In sum, preferred embodiment of the present utility model is these are only, is not intended to limit of the present utility model
Protection domain.It is all it is of the present utility model spirit and principle within, any modification, equivalent substitution and improvements made etc. all should be wrapped
It is contained within protection domain of the present utility model.
Claims (2)
1. knife edge shape pneumatic equipment bladess, it is characterised in that be made up of vane airfoil profile and blade root two parts, blade aerofoil portion surface
Three dimensional structure generated by ten airfoil Curve of wing and space characteristics aerofoil profile point continuous and derivable transition；It is described each
Airfoil Curve of wing is made up of pressure surface curve and suction surface curve respectively；It is that blade and blade opens up direction, vertical Z to define Z-direction
The face in direction is XOY plane；Space face of the locus face residing for first airfoil for Z=0, the first airfoil leading edge point is
Three-dimensional coordinate origin (0,0,0)；Line between each aerofoil profile surface curve leading edge point and trailing edge point is chord length, and chord length is in XOY plane
Angle with X-coordinate between centers is torsional angle, positive for torsional angle clockwise；
Described ten airfoil pressure surface curves and the corresponding coordinate figure of suction surface curve are as follows：
First airfoil Curve of wing coordinate (Z coordinate is 0mm)
Second airfoil Curve of wing coordinate (Z coordinate is 94.5mm)
3rd airfoil Curve of wing coordinate (Z coordinate is 189mm)
4th airfoil Curve of wing coordinate (Z coordinate is 283.5mm)
5th airfoil Curve of wing coordinate (Z coordinate is 378mm)
6th airfoil Curve of wing coordinate (Z coordinate is 472.5mm)
7th airfoil Curve of wing coordinate (Z coordinate is 567mm)
8th airfoil Curve of wing coordinate (Z coordinate is 661.5mm)
9th airfoil Curve of wing coordinate (Z coordinate is 756mm)
Tenth airfoil Curve of wing coordinate (Z coordinate is 803.25mm)
The space characteristics aerofoil profile point coordinates is (0mm, 0mm, 850mm)；
Ten feature airfoil Curve of wing chord lengths and torsional angle are as follows：
The blade root is made up of canned paragraph 13 and changeover portion 12, and canned paragraph is rectangular configuration, is machined with the bolt of Y direction thereon
Hole, for being fixedly connected with wind turbine hub, changeover portion is connected the first airfoil of section and blade aerofoil portion bolt hole.
2. knife edge shape pneumatic equipment bladess as claimed in claim 1, it is characterised in that a length of 80mm of the blade root canned paragraph,
A width of 94mm, a height of 47mm, the changeover portion is by the first aerofoil profile surface curve and canned paragraph end face (94mm × 47mm) by setting-out
Curve generates transition section structure body, and transition section length is 70mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620928473.2U CN206129492U (en) | 2016-08-22 | 2016-08-22 | Edge of a knife shape wind turbine blades |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620928473.2U CN206129492U (en) | 2016-08-22 | 2016-08-22 | Edge of a knife shape wind turbine blades |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206129492U true CN206129492U (en) | 2017-04-26 |
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ID=58564964
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620928473.2U Expired - Fee Related CN206129492U (en) | 2016-08-22 | 2016-08-22 | Edge of a knife shape wind turbine blades |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206129492U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106401866A (en) * | 2016-08-22 | 2017-02-15 | 内蒙古工业大学 | Blade point shaped wind turbine blade |
-
2016
- 2016-08-22 CN CN201620928473.2U patent/CN206129492U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106401866A (en) * | 2016-08-22 | 2017-02-15 | 内蒙古工业大学 | Blade point shaped wind turbine blade |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170426 Termination date: 20210822 |