CN104405592A - Large-scale wind turbine intelligent blade - Google Patents

Large-scale wind turbine intelligent blade Download PDF

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Publication number
CN104405592A
CN104405592A CN201410551190.6A CN201410551190A CN104405592A CN 104405592 A CN104405592 A CN 104405592A CN 201410551190 A CN201410551190 A CN 201410551190A CN 104405592 A CN104405592 A CN 104405592A
Authority
CN
China
Prior art keywords
blade
blade body
trailing edge
changeover portion
rudder face
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201410551190.6A
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Chinese (zh)
Inventor
许波峰
袁越
赵振宙
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hohai University HHU
Original Assignee
Hohai University HHU
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hohai University HHU filed Critical Hohai University HHU
Priority to CN201410551190.6A priority Critical patent/CN104405592A/en
Publication of CN104405592A publication Critical patent/CN104405592A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05BINDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2240/00Components
    • F05B2240/20Rotors
    • F05B2240/201Rotors using the Magnus-effect

Abstract

The invention discloses a large-scale wind turbine intelligent blade. The intelligent blade comprises a blade body and a tail edge wing flap which is connected with the cutting-off tail edge of the blade body; the tail edge wing flap comprises n divided deflection rubber surfaces, two two-end connecting transition segments and n-1 middle connecting transition segments, wherein n is larger than or equal to 1 and smaller than or equal to 3; the two-end connecting transition segments and the middle connecting transition segments are made of flexible materials; every two adjacent divided deflection rubber surfaces are connected through the corresponding middle connecting transition segment, and therefore the two adjacent divided deflection rubber surfaces and the corresponding middle connecting transition segment are in series connection to form a total deflection rubber surface; and the two ends of the total deflection rubber surface are connected with the blade body through the two-end connecting transition segments. According to the intelligent blade, the two ends of the tail edge wing flap are in smooth transition with the blade body, and the tail edge of the blade is continuous, so that the flow quality of the tail edge is improved. Flow-around flow stability of the blade is improved, deflection of the tail edge wing flap is controlled, and therefore the local aerodynamic load control and overall load optimal control over the blade can be achieved.

Description

A kind of large scale wind power machine intelligent blade
Technical field
The invention belongs to technical field of wind power generation, particularly a kind of large scale wind power machine intelligent blade.
Background technique
Along with wind wheel size increases, due to the wind shear of atmospheric boundary layer, large scale wind power machine blade flow field characteristic strengthens along exhibition to nonunf ormity, during rotation blade (especially blade tip) become a mandarin change can be more serious, add complicated multiple dimensioned turbulent flow, so no matter blade aerodynamic load is in spatial field or in time field, its unsteady characteristic is more remarkable, fatigue load increases, and even can cause flutter.Existing advanced person becomes oar control technique and shows following deficiency gradually: whole blade synchronization regulates can not effective controls local load fluctuation, and independent pitch inertia is greatly, uneconomical, easily causes vane change device transition use etc.Therefore, " intelligent blade " concept having light weight, inertia is little, reaction is fast and can realizes the advantages such as Partial controll is suggested.Intelligent blade can be understood as: add based in blade local or imbed the actuator that can control blade flow field, and driving actuator action by certain control law, thus changing the technology of wind turbine system response.
In existing trailing edge flaps intelligent blade, comparatively wide arc gap is there is between trailing edge flaps two ends and blade body, comparatively wide arc gap is there is between each point of deflection rudder face of trailing edge flaps, the inducing action producing stronger towed body vortex pair blade flow field is very important, and On The Problems of Hydrodynamic Stability needs to be made up by control strategy.
Summary of the invention
In order to solve background technique Problems existing, the present invention aims to provide a kind of large scale wind power machine intelligent blade, the trailing edge flaps two ends of this blade and blade body seamlessly transit, blade trailing edge is continuous, thus improve trailing edge flowing quality, improve air flow over blade flow stability, and by controlling the deflection of trailing edge flaps, realizing blade local pneumatic load and controlling and overall load optimal control.
In order to realize above-mentioned technical purpose, technological scheme of the present invention is:
A kind of large scale wind power machine intelligent blade, comprise blade body, also comprise the trailing edge flaps blocking trailing edge with blade body and be connected, described trailing edge flaps comprises n individual point of deflection rudder face, 2 two ends connect connection changeover portion in the middle of changeover portions and n-1, wherein, 1≤n≤3, described two ends connect changeover portion and the middle changeover portion that is connected is flexible material and makes; Connect changeover portion through centre between adjacent point of deflection rudder face to connect, thus series connection is 1 and always deflects rudder face, the two ends of total deflection rudder face connect changeover portion respectively and are connected with blade body through two ends.
Wherein, the distance of top to the blade body tip of above-mentioned trailing edge flaps is 10% of blade body length, and the end of trailing edge flaps is 20% ~ 30% of blade body length to the distance of blade body tip.
Wherein, it is triangular in shape when undeformed that above-mentioned two ends connect changeover portion, and what this triangle was connected with blade body is 30 ° ~ 45 ° with its angle as one side of whole blade trailing edge.
Wherein, above-mentioned point of deflection rudder face is trapezoidal wing, and its chord length accounts for 10% of local blade chord length, and its section aerofoil profile is symmetrical airfoil, and the thickness that its absolute thickness and blade body block trailing edge place is identical.
Wherein, connect changeover portion rectangular when undeformed in the middle of above-mentioned, its length is 1/5 of point deflection rudder face length.
Adopt the beneficial effect that technique scheme is brought:
The two ends that the present invention adopts flexible material to make connect changeover portion, make when trailing edge flaps deflects very close to each other between trailing edge flaps two ends and blade body, changeover portion is connected in the middle of adopting flexible material to make, very close to each other between making when dividing deflection control surface deflection different amount, structural seamlessly transitting makes fluid flow through changeover portion can not to haul out stronger towed body whirlpool to affect flow field, flow stability strengthens, the blade limit brought after solving wind energy conversion system large and fatigue load problem, extend blade working life, improve wind energy conversion system generated energy, for complete-system vendor and wind energy turbine set bring considerable economic benefit, cost of electricity-generating can be reduced simultaneously.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention 1.
Fig. 2 is the embodiment of the present invention 1 trailing edge flaps action schematic diagram.
Fig. 3 is the structural representation of the embodiment of the present invention 2.
Fig. 4 is the embodiment of the present invention 2 trailing edge flaps action schematic diagram.
Label declaration: 1, blade body; 2, deflection rudder face is divided; 3, two ends connect changeover portion; 4, middle connection changeover portion; 5, blade body blocks trailing edge; The distance of top to the blade body tip of L1, trailing edge flaps; The end of L2, trailing edge flaps is to the distance of blade body tip; S1, the middle length connecting changeover portion.
Embodiment
Below with reference to accompanying drawing, technological scheme of the present invention is described in detail.
Embodiment 1:
The structural representation of the embodiment of the present invention 1 as shown in Figure 1, a kind of large scale wind power machine intelligent blade, comprise blade body 1 and block with blade body the trailing edge flaps that trailing edge 5 is connected, described trailing edge flaps comprises 3 points of deflection rudder faces, 2,2 two ends and connects in the middle of changeover portions 3 and 2 and connect changeover portions 4.Described two ends connect changeover portion 3 and are middlely connected excessive section 4 and are flexible material and make; Connect changeover portion 4 through centre between adjacent point of deflection rudder face 2 to connect, thus series connection is 1 and always deflects rudder face, the two ends of total deflection rudder face connect changeover portion 3 respectively and are connected with blade body 1 through two ends.
In embodiment 1, the distance L1 of top to the blade body tip of trailing edge flaps is 10% of blade body length, and the end of trailing edge flaps is 30% of blade body length to the distance L2 of blade body tip.Divide deflection rudder face 2 to be trapezoidal wing, its chord length accounts for 10% of local blade chord length, and its section aerofoil profile is symmetrical airfoil, and the thickness that its absolute thickness and blade body block trailing edge 5 place is identical.In the art, the definition of chord length: in all multiple spots on aerofoil profile line, have a bit maximum with the distance of the trailing edge of aerofoil profile, this point is called the leading edge of aerofoil profile, and the straightway connecting leading edge and trailing edge is called the string of a musical instrument of aerofoil profile, and its length is called chord length.The definition of local blade chord length: the chord length of the blade section aerofoil profile of whole blade radial position.The definition of symmetrical airfoil: the aerofoil profile of the upper and lower camber line symmetry of aerofoil profile.The definition of absolute thickness: perpendicular to the aerofoil profile string of a musical instrument aerofoil profile upper and lower surface between length of straigh line be the thickness of aerofoil profile, the maximum ga(u)ge of aerofoil profile is called the absolute thickness of this aerofoil profile.It is triangular in shape when undeformed that two ends connect changeover portion 3, and what this triangle was connected with blade body is 30 ° with its angle β as one side of whole blade trailing edge.Middle connection changeover portion 4 is rectangular when undeformed, and its length S1 is 1/5 of point deflection rudder face 2 length.
The embodiment of the present invention 1 trailing edge flaps action schematic diagram as shown in Figure 2,3 sections of points of deflection rudder faces 2 can control separately deflection separately and realize the control of blade local pneumatic load and overall load optimal control.Two ends connect changeover portion 3 and make when trailing edge flaps deflects very close to each other between trailing edge flaps two ends and blade body, middle connection changeover portion 4 is very close to each other between making when dividing deflection control surface deflection different amount, structural seamlessly transitting makes fluid flow through changeover portion can not to haul out stronger towed body whirlpool to affect flow field, and flow stability strengthens.
Embodiment 2:
The structural representation of the embodiment of the present invention 2 as shown in Figure 3, a kind of large scale wind power machine intelligent blade, comprise blade body 1 and block with blade body the trailing edge flaps that trailing edge 5 is connected, described trailing edge flaps comprises 1 point of deflection rudder face 2 and is connected changeover portion 3 with 2 two ends.Described two ends connect changeover portion 3 for flexible material and make; Divide the two ends of deflection rudder face 2 to connect changeover portion 3 respectively through two ends to be connected with blade body 1.
In example 2, the distance L1 of top to the blade body tip of trailing edge flaps is 10% of blade body length, and the end of trailing edge flaps is 20% of blade body length to the distance L2 of blade body tip.Divide deflection rudder face 2 to be trapezoidal wing, its chord length accounts for 10% of local blade chord length, and its section aerofoil profile is symmetrical airfoil, and the thickness that its absolute thickness and blade body block trailing edge 5 place is identical.It is triangular in shape when undeformed that two ends connect changeover portion 3, and what this triangle was connected with blade body is 30 ° with its angle β as one side of whole blade trailing edge.Middle connection changeover portion 4 is rectangular when undeformed, and its length S1 is 1/5 of point deflection rudder face 2 length.The embodiment of the present invention 2 trailing edge flaps action schematic diagram as shown in Figure 4, realizes the control of blade local pneumatic load and overall load optimal control by controlling point deflection rudder face 2 deflection.Two ends connect changeover portion 3 and make when trailing edge flaps deflect very close to each other between trailing edge flaps two ends and blade body, and structural seamlessly transitting makes fluid flow through changeover portion can not to haul out stronger towed body whirlpool to affect flow field, flow stability enhancing.
When the pneumatic equipment blades made of oversize rotates, due to the wind shear of atmospheric boundary layer, blade flow field characteristic strengthens along exhibition to nonunf ormity, and the inflow characteristics of blade near tip in time amplitude of variation also increases, and the blade limit and fatigue load are seriously increased.Adopt the pneumatic equipment blades made of trailing edge flaps, can quick, sensitive, adjusting vane local load economically, make load become mild along the change of room and time.The two ends adopting flexible material to make connect changeover portion and are connected changeover portion with centre, changeover portion downstream, near-wake region vorticity ratio of extreme values is greatly reduced without during changeover portion, effectively weakens the inducing action in towed body whirlpool, downstream.
To deflect rudder face segmentation, local load is controlled more rationally efficient, if hop count is too many, control effects may not be certain to have and significantly improves, and but can bring the difficulty in structure and preparation process, therefore hop count need not more than 3.In addition, angle β is too little, can destroy more blade body structure, and angle β is too large, and then gas flow smooth transition effect reduces, and therefore selects between 30 ° ~ 45 °.
Above embodiment is only and technological thought of the present invention is described, can not limit protection scope of the present invention with this, and every technological thought proposed according to the present invention, any change that technological scheme basis is done, all falls within scope.

Claims (5)

1. a large scale wind power machine intelligent blade, comprise blade body, it is characterized in that: also comprise the trailing edge flaps blocking trailing edge with blade body and be connected, described trailing edge flaps comprises n individual point of deflection rudder face, 2 two ends connect connection changeover portion in the middle of changeover portions and n-1, wherein, 1≤n≤3, described two ends connect changeover portion and are middlely connected excessive section and are flexible material and make; Connect changeover portion through centre between adjacent point of deflection rudder face to connect, thus series connection is 1 and always deflects rudder face, the two ends of total deflection rudder face connect changeover portion respectively and are connected with blade body through two ends.
2. a kind of large scale wind power machine intelligent blade according to claim 1, it is characterized in that: the distance of top to the blade body tip of described trailing edge flaps is 10% of blade body length, the end of trailing edge flaps is 20% ~ 30% of blade body length to the distance of blade body tip.
3. a kind of large scale wind power machine intelligent blade according to claim 1, it is characterized in that: it is triangular in shape when undeformed that described two ends connect changeover portion, and what this triangle was connected with blade body is 30 ° ~ 45 ° with its angle as one side of whole blade trailing edge.
4. a kind of large scale wind power machine intelligent blade according to claim 1, it is characterized in that: described point of deflection rudder face is trapezoidal wing, its chord length accounts for 10% of local blade chord length, and its section aerofoil profile is symmetrical airfoil, and the thickness that its absolute thickness and blade body block trailing edge place is identical.
5. a kind of large scale wind power machine intelligent blade according to claim 1, is characterized in that: connect changeover portion in the middle of described rectangular when undeformed, and its length is point deflect 1/5 of rudder face length.
CN201410551190.6A 2014-10-16 2014-10-16 Large-scale wind turbine intelligent blade Pending CN104405592A (en)

Priority Applications (1)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111188728A (en) * 2020-02-13 2020-05-22 中国船级社质量认证公司 Wind wheel blade of wind generating set

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1314885A1 (en) * 2001-11-26 2003-05-28 Bonus Energy A/S Flexible serrated trailing edge for wind turbine rotor blade
WO2010043645A2 (en) * 2008-10-14 2010-04-22 Vestas Wind Systems A/S Wind turbine blade with device for changing the aerodynamic surface or shape
CN102112734A (en) * 2008-08-01 2011-06-29 维斯塔斯风力系统集团公司 Rotor blade extension portion having skin located over framework
CN102312770A (en) * 2010-07-06 2012-01-11 Lm玻璃纤维制品有限公司 Wind turbine blade with variable trailing edge
CN102459876A (en) * 2009-04-30 2012-05-16 维斯塔斯风力系统有限公司 Wind turbine rotor blade

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1314885A1 (en) * 2001-11-26 2003-05-28 Bonus Energy A/S Flexible serrated trailing edge for wind turbine rotor blade
CN102112734A (en) * 2008-08-01 2011-06-29 维斯塔斯风力系统集团公司 Rotor blade extension portion having skin located over framework
WO2010043645A2 (en) * 2008-10-14 2010-04-22 Vestas Wind Systems A/S Wind turbine blade with device for changing the aerodynamic surface or shape
CN102459876A (en) * 2009-04-30 2012-05-16 维斯塔斯风力系统有限公司 Wind turbine rotor blade
CN102312770A (en) * 2010-07-06 2012-01-11 Lm玻璃纤维制品有限公司 Wind turbine blade with variable trailing edge

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111188728A (en) * 2020-02-13 2020-05-22 中国船级社质量认证公司 Wind wheel blade of wind generating set

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Application publication date: 20150311

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