CN204921256U - Aerogenerator blade - Google Patents
Aerogenerator blade Download PDFInfo
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- CN204921256U CN204921256U CN201520171659.3U CN201520171659U CN204921256U CN 204921256 U CN204921256 U CN 204921256U CN 201520171659 U CN201520171659 U CN 201520171659U CN 204921256 U CN204921256 U CN 204921256U
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Abstract
The utility model provides an aerogenerator blade, the root of blade includes the trailing edge of an aspect, this trailing edge of is the air current suction area, the trailing edge expands to the place of root of blade and hub connection, the trailing edge district and/or the blade upper surface structure of root of blade have the air current suction area in order to let partly air current inhaleed through this air current suction area, and the air current suction area includes the hole.
Description
(1) technical field:
The utility model technology relates to technical field of wind power generation, refers more particularly to a kind of Novel wind power generator blade.
(2) background technique
The generating efficiency improving wind-driven generator from current existing technology has two class diverse ways.One class methods optimize blade shape and leaf cross-section; Other class methods are that the flow boundary layer air affecting blade surface adsorbs the flowing improving air-flow.The utility model is devoted to the latter, does not also have the method especially effectively improving wind turbine power generation efficiency up to now in this field.The main task of the utility model designs a kind of blade technology of wind-driven generator and corresponding controlling method to improve the income of total system, the utility model power causes and reaches several aspect below: compact design, little materials demand and cost of production as far as possible, produce as far as possible little noise in running, the increase of load reduces as far as possible.Allow the toggle speed of blower fan reduce as far as possible, to ensure simultaneously wind-driven generator peak output to maintain before design standard.The utility model can allow the generated energy income of wind-driven generator when wind speed is little increase significantly.The raising principal security of performance and income in low load region carry out.
(3) summary of the invention
The utility model is by the following technical solutions:
A kind of blade of wind-driven generator, root of blade comprises the trailing edge of a plane shape, and this trailing edge is air-flow suction area; Trailing edge
Expand to the place that root of blade is connected with wheel hub; The posterior marginal zone of root of blade and/or blade upper surface are configured with air-flow suction area to allow a part
Air-flow is inhaled into by this air-flow suction area, and air-flow suction area comprises hole.
Preferably, exhaust area is configured with at blade tip.
Preferably, the airflow duct being arranged on blade interior is also comprised.
Preferably, also comprise the hole being used for being vented and/or groove that are arranged on exhaust area, the profile of this hole and/or groove is dentation.
Preferably, pump, ventilation fan or blower are installed to be transmitted from air-breathing district to direction, exhaust area by air-flow in airflow duct.
Preferably, wing fence is also comprised to reduce the wake turbulence of root of blade.
The utility model relates to blade (see Fig. 2) and blade upper surface wherein; Blade lower surface; Blade inlet edge; Trailing edge; Blade and wheel hub bearing; Blade tip; From blade and wheel hub bearing 17 to the root of blade of its maximum width of blade; Have an airflow duct from root of blade to blade tip in blade interior, this airflow duct is used for an air-flow and leads airflow exits district from air-flow suction area, thus impacts the flow boundary layer air of blade surface, the particularly absorption in boundary layer.
(4) accompanying drawing explanation
Fig. 1, traditional blade design schematic diagram.
Fig. 2, blade design invention schematic diagram of the present utility model.
Fig. 3, the tip segment schematic diagram of blade design invention of the present utility model.
Fig. 4, the tip segment generalized section of blade design invention of the present utility model.
Reference numerals list
1 blade
11 roots of blade
12 blade tips
13 upper surfaces
14 lower surfaces
15 trailing edges
16 leading edges
17 wheel hub bearings
21 air-flow suction areas
22 airflow exits districts
23 airflow ducts
24 valves
25 air-breathing holes
26 teeth
27 exhaust holes
28 wing fences
29 winglets
(5) embodiment
As shown in accompanying drawing 1-4,
First air-flow can accelerate due to the Curvature Effect of blade surface through blade 1 upper surface 13, behind maximum curvature position (arrival downstream), airspeed can become large and slack-off due to downstream pressure, boundary layer kinetic energy has loss, thus causes being separated of the increase of boundary layer thickness and boundary layer and blade upper surface 13.Air-flow leaves blade surface from the separation point in boundary layer, and consequence is that the lift of blade 1 declines and resistance rising.
The object affecting boundary layer is exactly in order to avoid air-flow is from the separation of blade upper surface 13.Must try one's best and many be attached to above blade in boundary layer, the separation point in boundary layer will try one's best near trailing edge 15, thus the generating efficiency of raising wind-driven generator.
The utility model mainly takes two kinds of modes to affect boundary layer: air-flow sucks and airflow exits.Air-flow sucks and occurs in the region punched in root of blade 11 region, to be sucked be close to blade surface at this regional edge interlayer by air-flow.Airflow exits is to wishing affected Boundary-Layer Zone the airflow exits accelerated by blade rotary.The air-flow of discharge can bring energy for boundary layer, thus keeps the stable of boundary layer as far as possible for a long time.
The main task of the utility model invents a kind of blade technology of wind-driven generator and corresponding air stream transportation controlling method to improve the income of total system, the utility model power causes and reaches several aspect below: compact design, as far as possible little materials demand, as far as possible little cost of production, producing little noise and as far as possible little load as far as possible in running increases.Another one task of the present utility model allows wind-driven generator increase significantly in the generated energy income in little wind speed district.Allow the toggle speed of blower fan reduce as far as possible, to ensure simultaneously wind-driven generator peak output to maintain before design standard.The raising principal security of performance and income in low load region carry out.The utility model considers that emphatically the air current flow improving root of blade 11 is to ensure that air-flow is close to blade surface for a long time as far as possible, allows their energy be utilized as far as possible simultaneously.
The solution of above-mentioned task comprises blade-section and air stream transportation controlling method.
As shown in Figure 2, the utility model technology at least needs the trailing edge 15 constructing a new plane shape blade root 11, is namely air-flow suction area 21 near this new trailing edge 15.Very large effect is played for the performance and efficiency raising improving wind-driven generator in this air-flow suction area 21.Construct this material required for air-flow suction area 21 also considerably less.Relative to the blade root (as shown in Figure 1) of traditional blade of wind-driven generator circle, the load that this design causes improves very little, does not therefore need to do structural strengthening at root.Blade according to this technological scheme also has following characteristics:
According to the trailing edge of this technological scheme can smooth transition to the trailing edge 15 of blade itself.
The place that root of blade is connected with wheel hub can be expanded to according to the trailing edge 15 of this technological scheme always.This design can allow blower fan when wind speed is very little with regard to entry into service, thus allows more wind energy transformation become electric energy.
Although the design in this technological scheme can cause the increase of root of blade region width of blade, the maximum depth of root of blade before still can not exceeding change design.
Can slight rounding or make edge line according to the transition region of the trailing edge 15 of this technological scheme and blade upper surface 13 and lower surface 14.The first-selected processing method slightly polished.
A king-sized advantage of this design is that the width of root of blade does not increase how many, and the transport difficulty of blade can be the same with the traditional blade shown in Fig. 1 with method.
The material that this design uses can be used as other parts manufacturing blade completely, and vice versa.
The design also can adopt Wortmann aerofoil profile to carry out the root of blade posterior marginal zone of formation level at root of blade, can improve the air current flow of root of blade like this.The Wortmann aerofoil profile FX77-W-500 of special recommendation, FX77-W-400, FX77-W-343.
The words allowed also can construct new leading edge by Wortmann aerofoil profile in the leading edge 16 of root of blade, thus improve the air current flow of root of blade further.Such design can optimize the performance of wind-driven generator further, because such design can ensure that air-flow is all laminar flow in root of blade very large regions, and can not cause energy loss because of generation turbulent flow.
If want that constructing air-flow suction area 21 at the posterior marginal zone of root of blade or blade upper surface 13 is inhaled into by this region to allow a part of air-flow, can punch in this region, the quantity in hole can decide according to demand.
Air-flow is in the suction position of root of blade blade upper surface 13, first-selected near trailing edge 15 and in the middle of root of blade.Like this can the boundary layer affecting air-flow relatively more early, and allow gas as far as possible time long being attached on blade surface flow.
Air-flow only can affect the flow boundary layer air of trailing region in the suction of root of blade trailing edge 15.This air-flow sucks and can effectively allow the air-flow of root of blade upper surface 13 be adjacent to completely in this region.
Suck to suck with the air-flow of trailing edge 15 at the air-flow of root of blade upper surface 13 and combine, like this efficiency can raise more.Adopt in such situation control technique to control a part of air-breathing hole 25 and open in addition a part shut.Which some perforations open or shut be with wind-driven generator wind speed---Energy transmission performance zones is relevant.
As shown in Figure 3 and Figure 4, the utility model needs to construct exhaust area at blade tip 12, first locational requirement: 1) at the blade upper surface 13 of blade tip 12 and/or the posterior border position of blade tip 12; 2) in the leeward district of blade; 3) on the blade tip and/or the new winglet 29 (see Fig. 4) added of traditional design.
The air discharge of discharging from blade upper surface 13 can allow the air of blade surface and boundary layer accelerate, thus for bringing extra energy in boundary layer.
From the obvious performance improving air-flow and flow at blade surface of air meeting that trailing edge 15 is discharged, the gas of discharge can make the gas flow of blade surface accelerate, and this design can reduce the noise of blade tip.
Air can also be discharged from the surface of the winglet 29 of blade tip 12 or posterior border position, and first-selection is discharged from leeward position.This design further can reduce noise.The position of relief opening should be designed to the shape (inner space is large, exports relatively thin) of NACA-Hutze.If relief opening is too large, the gas ejected and their energy just do not have effect.
It is exactly reduce tip vortex that winglet 29 also has one to act on especially.This eddy current is prevalent in the tip of the blade of the traditional design shown in Fig. 1.
Gas can be discharged by the exhaust hole 27 and/or groove being arranged on exhaust gas region, and external frame is dentation first, comprises tooth 26, and this shape is very useful for reduction noise.Particularly dentation profile and inner hole combine the very effective less noise from air-flow of meeting, thus can reduce the noise pollution to environment.Dentation profile can play the effect of mixing well to the gas of discharging.Even if winglet designs obtains very little, also extraordinary scavenging action can be played.And dentation profile is very easy to manufacture, cutting or abrasive process is adopted to realize.
There is valve 24 can to control air current flow wherein in airflow duct 23, thus control the impact in boundary layer further.Valve 24 can carry out stepless continuous control to the intake of gas and conductive quantity.Every covering device can gas flow from without flow control to full dose, without flow control mainly in order to protect wind-driven generator to occur overload situations, control can from wind-driven generator start be continued until by the whole process of rated power operation.
In order to improve the performance of wind-driven generator further and reduce the threshold wind velocity of wind-driven generator, auxiliary equipment can be installed in airflow duct 23 to activate boundary layer influence.Air-flow can be allowed from air-breathing district to exhaust area or direction transmission by this auxiliary equipment.This auxiliary equipment can be pump, ventilation fan, blower or can play the equipment of similar effect.The centrifugal force that blade rotary produces can be transferred to airflow exits district 22 air-flow from air-flow suction area 21, thus wind-driven generator just can be started under very little wind speed.Transport from blade tip 12 to the reciprocal air-flow of root of blade and can play reverse influence to boundary layer.
Wing fence 28 (see Fig. 2) can also be used in addition to carry out the performance that is improved wind-driven generator, and wing fence 28 can affect air-flow, reduces the wake turbulence of root of blade.
The assembly mentioned in the scheme of above-mentioned be improved wind-driven generator performance can subsequent installation.In order to the Blade Properties of traditional design can be allowed effectively to improve, three assemblies are necessary at least below: the 1) trailing edge of the plane shape of root of blade, these parts can be transformed based on the blade of normal circular section shape.2) the airflow exits district 22 of blade tip 12.3) also have one be can subsequent installation at the airflow duct 23 of blade interior.These parts can adopt traditional connecting means to be arranged on blade.These methods comprise laminating, and bolt connects, bonding or similar connecting means.
The control sucked for air-flow in this special model utility and transmit comprises three parts: tripped zone, working area and peak output district
Wind-driven generator shut down and/or maximum power operation time, do not have air-flow to be inhaled into
In startup territory, all holes are opened, and suck all air-flows that can suck as far as possible
Suck at working zone air-flow and control to be change.When starting beginning, wind energy power acc power is little, and all holes are opened more air-flow can be inhaled into, and when reaching peak output, the air-flow of suction is minimum, and pilot process is transition slowly.
Above-mentioned control can ensure that wind-driven generator has a lot of liftings in low-power district and tripped zone generated energy, and can overload situations be avoided as soon as possible to occur.
In this controlling method, can control to allow air-flow no longer suck after wind-driven generator reaches rated power.Adopt design of the present utility model that wind-driven generator can be allowed under less wind speed just can to reach rated power, after this, the impact of flow boundary layer air should not worked again, otherwise the generator of wind-driven generator can be caused to cross macrolesion due to load or burn.
Claims (6)
1. a blade of wind-driven generator, is characterized in that, root of blade comprises the trailing edge of a plane shape, and this trailing edge is air-flow suction area; Trailing edge expands to the place that root of blade is connected with wheel hub; The posterior marginal zone of root of blade and/or blade upper surface are configured with air-flow suction area and are inhaled into by this air-flow suction area to allow a part of air-flow, and air-flow suction area comprises hole.
2. blade of wind-driven generator according to claim 1, is characterized in that, is configured with exhaust area at blade tip.
3. blade of wind-driven generator according to claim 1, is characterized in that, also comprises the airflow duct being arranged on blade interior.
4. blade of wind-driven generator according to claim 2, is characterized in that, also comprise the hole being used for being vented and/or groove that are arranged on exhaust area, the profile of this hole and/or groove is dentation.
5. blade of wind-driven generator according to claim 3, is characterized in that, is provided with pump, ventilation fan or blower to be transmitted from air-breathing district to direction, exhaust area by air-flow in airflow duct.
6. blade of wind-driven generator according to claim 1, is characterized in that, also comprises wing fence to reduce the wake turbulence of root of blade.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520171659.3U CN204921256U (en) | 2015-03-25 | 2015-03-25 | Aerogenerator blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520171659.3U CN204921256U (en) | 2015-03-25 | 2015-03-25 | Aerogenerator blade |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204921256U true CN204921256U (en) | 2015-12-30 |
Family
ID=54970390
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520171659.3U Ceased CN204921256U (en) | 2015-03-25 | 2015-03-25 | Aerogenerator blade |
Country Status (1)
| Country | Link |
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| CN (1) | CN204921256U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106089572A (en) * | 2016-08-11 | 2016-11-09 | 中国华电科工集团有限公司 | A kind of two section type winglet reducing Axis Wind Turbine With A Tip Vane eddy current |
| CN106468240A (en) * | 2015-08-20 | 2017-03-01 | 北京博比风电科技有限公司 | A kind of wind generator set blade synergistic device design |
| CN106677978A (en) * | 2015-11-11 | 2017-05-17 | 北京博比风电科技有限公司 | Blade jet-flow synergistic system design for wind generator set |
-
2015
- 2015-03-25 CN CN201520171659.3U patent/CN204921256U/en not_active Ceased
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106468240A (en) * | 2015-08-20 | 2017-03-01 | 北京博比风电科技有限公司 | A kind of wind generator set blade synergistic device design |
| CN106677978A (en) * | 2015-11-11 | 2017-05-17 | 北京博比风电科技有限公司 | Blade jet-flow synergistic system design for wind generator set |
| CN106089572A (en) * | 2016-08-11 | 2016-11-09 | 中国华电科工集团有限公司 | A kind of two section type winglet reducing Axis Wind Turbine With A Tip Vane eddy current |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| IW01 | Full invalidation of patent right | ||
| IW01 | Full invalidation of patent right |
Decision date of declaring invalidation: 20160926 Decision number of declaring invalidation: 30133 Granted publication date: 20151230 |