CN218093301U - Fan blade wing section with flexible tail edge additionally arranged at rear edge - Google Patents
Fan blade wing section with flexible tail edge additionally arranged at rear edge Download PDFInfo
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- CN218093301U CN218093301U CN202222637004.3U CN202222637004U CN218093301U CN 218093301 U CN218093301 U CN 218093301U CN 202222637004 U CN202222637004 U CN 202222637004U CN 218093301 U CN218093301 U CN 218093301U
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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 provides a fan blade wing section with a flexible tail edge at the rear edge, belonging to the field of fluid machinery design, wherein the wing section comprises a fan blade wing section main body; fan blade wing section main part's one end is oval head structure, and fan blade wing section main part's the other end progressively contracts and forms the afterbody structure, the terminal cross section of afterbody structure is the rectangle, the terminal level of afterbody structure is fixed with planar structure's flexible trailing edge, the flexible trailing edge with fan blade wing section main part be connected one end width with the rectangle width equals, the tail end of flexible trailing edge is the arc. The performance is excellent, and the dynamic load of the fan blade under the operation condition and the extreme condition can be reduced, so that the pneumatic performance is improved.
Description
Technical Field
The utility model belongs to fluid machinery designs the field, specifically is a trailing edge adds fan blade wing section that is equipped with flexible trailing edge.
Background
At present, wind power generation still faces a plurality of challenges, a wind turbine is core equipment for capturing wind energy and realizing wind power generation, the operation load of a unit of the wind turbine directly influences the efficiency and energy consumption of the wind turbine, and a blade is one of core components of the wind turbine and plays a vital role in the pneumatic characteristic, stable operation and the like of the wind turbine.
The wing profile of the existing fan blade is usually of an integrated sheet metal structure, and the structure is convenient to manufacture but has poor pneumatic performance. According to the current report, after the trailing edge is additionally arranged on the trailing edge of the wing profile of the fan blade, the lift force and the lift-drag ratio of the wing profile of the fan are increased, so that the air trapping capacity of the fan at low wind speed is enhanced, and the output of the fan is increased. However, the rigid trailing edge is often hinged to the leading edge, and there is a significant gap with the leading edge, which causes air to penetrate through during operation, resulting in loss of lift and noise.
SUMMERY OF THE UTILITY MODEL
To the problem that exists among the prior art, the utility model provides a trailing edge adds the fan blade wing section that is equipped with flexible trailing edge, excellent performance can reduce the dynamic load of fan blade under operating condition and extreme operating mode to improve aerodynamic performance.
The utility model discloses a realize through following technical scheme:
a fan blade wing section with a flexible tail edge additionally arranged at the rear edge comprises a fan blade wing section main body;
fan blade wing section main part's one end is oval head structure, and fan blade wing section main part's the other end progressively contracts and forms the afterbody structure, the terminal cross section of afterbody structure is the rectangle, the terminal level of afterbody structure is fixed with planar structure's flexible trailing edge, the flexible trailing edge with fan blade wing section main part be connected one end width with the rectangle width equals, the tail end of flexible trailing edge is the arc.
Preferably, the tail end of the tail structure is fixedly bonded with the flexible tail edge through an adhesive.
Preferably, the ratio of the length of the flexible tail edge to the chord length of the airfoil main body of the fan blade is (8-12): (92-97).
Preferably, the material of the flexible tail edge is thermoplastic resin.
Preferably, the main body structure of the flexible tail edge is strip-shaped, and the tail end of the strip-shaped structure is smoothly connected with the arc.
Further, the strip-shaped structure is rectangular, and the length of the rectangle is 0.992 of the total length of the flexible tail edge.
Further, the tail end shape of the flexible tail edge is symmetrical along the length direction of the flexible tail edge, and the right half part formed by the following oval equation curves is satisfied:
wherein: x is the length direction of flexible trailing edge, y be flexible trailing edge rectangle part with the linear direction that the arc contacted, the initial point is x and y's intersection, the initial point upwards is the positive direction of y, the initial point right is the positive direction of x, d 4 Half the width of the flexible trailing edge rectangle, d 5 Is the value of the minor semi-axis of the curve of the oval equation, d 6 The value of the semi-axis of the curve of the oval equation is shown.
Further, wherein d 5 The ratio of the chord length of the main body to the chord length of the airfoil body of the fan blade is 0.005: (0.88-0.92), d 6 The ratio of the chord length of the main body of the fan blade airfoil to the chord length of the main body of the fan blade airfoil is 0.008: (0.88-0.92).
Compared with the prior art, the utility model discloses following profitable technological effect has:
the utility model relates to a trailing edge adds fan blade wing section that is equipped with flexible trailing edge, the one end of fan blade wing section main part is oval head structure, the other end progressively contracts and forms the afterbody structure, the terminal cross section design of afterbody structure is the rectangle, can make things convenient for the flexible trailing edge of horizontal fixed plane structure, the tail end of flexible trailing edge is the arc, fan blade wing section after improving like this catches external air current at the operation in-process, flexible trailing edge takes place bending deformation along with the air current change, thereby reduce the dynamic load of fan blade wing section under operation operating condition and extreme operating mode, thereby pneumatic performance is improved. The utility model discloses a flexible trailing edge has improved the limit load and the fatigue load that current blade bore at the actual motion in-process, has prolonged life effectively.
Drawings
Fig. 1 is the airfoil structure schematic diagram of the existing fan blade of the present invention.
Fig. 2 is the wing section structure schematic diagram of the fan blade with the flexible trailing edge added at the trailing edge.
Fig. 3 is a block diagram of the flexible trailing edge of fig. 2.
In the figure: 1-original fan blade wing profile; 2-a fan blade airfoil body; 3-flexible trailing edge; 4-flexible tail edge.
Detailed Description
To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the embodiments of the present invention are combined to clearly and completely describe the technical solution in the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present invention.
The following will describe in detail a fan blade airfoil with a flexible trailing edge added to a trailing edge according to an embodiment of the present invention with reference to the accompanying drawings.
The utility model relates to a trailing edge adds fan blade wing section that is equipped with flexible trailing edge has carried out structural improvement on the basis of current former fan blade wing section 1, and the structure of former fan blade wing section 1 is as shown in figure 1, and the chord length is established to d 1 The main body is blade-shaped, one end of the main body is an elliptical head structure, the other end of the main body is gradually contracted and overlapped at a small included angle to form a tail structure, so that the air trapping capacity of the original fan blade airfoil 1 in the rotating process is enhanced, and the main body structure between the two ends is elliptical.
The fan blade wing profile with the flexible tail edge at the rear edge is shown in figure 2, the main body 2 of the fan blade wing profile is the main body structure of the original fan blade wing profile 1, and the chord length is set as d 2 The length of the cut part is 3 percent of the chord length of the original fan blade airfoil 18% of the length d of the newly added flexible tail edge 3 3 Is 8-12 percent of the original fan blade airfoil 1, namely d 3 ＝(8％-12％)d 1 I.e. d 2 ＝(0.88-0.92)d 1 When embodying d 3 Selecting 0.1. One end of the flexible tail edge 3 is fixedly bonded with one end of the fan blade airfoil main body 2.
Specifically, the tail part of the original fan blade airfoil 1 is cut off, namely the side surface of the tail part of the fan blade airfoil main body 2 is coated with an adhesive, the flexible tail edge 3 is of a planar structure and made of thermoplastic resin with certain rigidity and strength, such as polyethylene, and can be directly purchased, the main body of the fan blade airfoil is of a strip structure with equal width and equal thickness, the strip structure is rectangular, the width of the rectangular structure is the width of the tail end of the original fan blade airfoil 1 cut off according to the size of 3% -8% of chord length, and the length of the rectangular structure is (8% -12%) d 1 -d 6 ＝(0.072-0.112)d 1 The tail part, namely the tail end 4 of the flexible tail edge, is arc-shaped, and is symmetrical along the length direction of the flexible tail edge 3, the tail end of the strip-shaped structure is smoothly connected with the arc, the specific shape of the arc is shown in fig. 3, and the right half part formed by the following cubic oval equation is satisfied:
wherein x is the length direction of flexible trailing edge 3, and y is the linear direction that 3 rectangle parts of flexible trailing edge contacted with the arc, and the initial point is the junction of x and y, and the initial point upwards is the positive direction of y, and the initial point right is the positive direction of x, d 4 Is half the rectangular width of the flexible trailing edge 3, d 5 Is the value of the minor semi-axis of the curve of the oval equation, d 6 The value of the major semi-axis of the curve of the oval equation is shown. d 4 D, changing with the shape and cut length of the wing section 1 of the original fan blade to a certain extent 5 ＝0.005d 1 ，d 6 ＝0.008d 1 . One side of the strip-shaped structure of the flexible tail edge 3 is pressed with the side surface of the tail part of the fan blade wing-shaped main body 2 coated with the adhesive, and finally, the fixation is finished.
Through the improvement, in the fan blade wing section with the flexible tail edge additionally arranged on the tail edge, the flexible tail edge 3 can be subjected to balanced stress deformation along with the change of turbulent airflow or vortex airflow, and the dynamic load of the fan blade wing section under the operation working condition and the extreme working condition is reduced through deformation (the former rigid tail edge is hard and is easy to blow out), so that the pneumatic performance is improved.
The utility model discloses a flexible trailing edge has improved the ultimate load and the fatigue load that former fan blade wing section 1 bore at the actual motion in-process, has prolonged life effectively, and flexible trailing edge 3 can produce bending deformation under the pneumatic load effect, can reduce the dynamic load of blade under operating mode and extreme operating mode to improve pneumatic performance, strengthen the practicality of this device.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. A fan blade wing profile with a flexible trailing edge additionally arranged at the trailing edge is characterized by comprising a fan blade wing profile main body (2);
the one end of fan blade wing section main part (2) is oval head structure, and the other end of fan blade wing section main part (2) progressively contracts and forms the afterbody structure, the terminal cross section of afterbody structure is the rectangle, the terminal level of afterbody structure is fixed with planar structure's flexible trailing edge (3), flexible trailing edge (3) and the one end width that fan blade wing section main part (2) is connected with the rectangle width equals, and the tail end of flexible trailing edge (3) is the arc.
2. The fan blade airfoil with the flexible trailing edge added to the trailing edge according to claim 1, characterized in that the tail end of the tail structure is adhesively fixed to the flexible trailing edge (3) by means of an adhesive.
3. The fan blade airfoil with the flexible trailing edge added to the trailing edge according to claim 1, wherein the ratio of the length of the flexible trailing edge (3) to the chord length of the fan blade airfoil body (2) is (8-12): (92-97).
4. The fan blade airfoil profile with the flexible trailing edge added to the trailing edge according to claim 1, characterized in that the flexible trailing edge (3) is made of thermoplastic resin.
5. The fan blade airfoil profile with the flexible trailing edge additionally arranged on the trailing edge according to claim 1, characterized in that the main structure of the flexible trailing edge (3) is strip-shaped, and the tail end of the strip-shaped structure is smoothly connected with the arc.
6. The fan blade airfoil with the flexible trailing edge added to the trailing edge according to claim 5, characterized in that the strip-shaped structure is rectangular, and the length of the rectangle is 0.992 of the total length of the flexible trailing edge (3).
7. The fan blade airfoil with the flexible tail edge additionally arranged at the rear edge according to claim 6, wherein the tail end shape of the flexible tail edge (3) is symmetrical along the length direction of the flexible tail edge (3) and meets the right half part formed by the following oval equation curves:
wherein: x is the length direction of flexible trailing edge (3), y be flexible trailing edge (3) rectangle part with the straight line direction that the arc contacted, the initial point is the intersection of x and y, and the initial point upwards is the positive direction of y, and the initial point is the positive direction of x to the right, d 4 Is half of the rectangular width of the flexible trailing edge (3), d 5 Is the value of the minor semi-axis of the curve of the oval equation, d 6 The value of the major semi-axis of the curve of the oval equation is shown.
8. The airfoil of claim 7, wherein d is a flexible trailing edge attached to the trailing edge 5 The ratio of the chord length of the main body (2) to the chord length of the fan blade airfoil is 0.005: (0.88-0.92),d 6 the ratio of the chord length of the main body (2) to the chord length of the fan blade airfoil is 0.008: (0.88-0.92).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222637004.3U CN218093301U (en) | 2022-09-29 | 2022-09-29 | Fan blade wing section with flexible tail edge additionally arranged at rear edge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222637004.3U CN218093301U (en) | 2022-09-29 | 2022-09-29 | Fan blade wing section with flexible tail edge additionally arranged at rear edge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218093301U true CN218093301U (en) | 2022-12-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222637004.3U Active CN218093301U (en) | 2022-09-29 | 2022-09-29 | Fan blade wing section with flexible tail edge additionally arranged at rear edge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218093301U (en) |
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2022
- 2022-09-29 CN CN202222637004.3U patent/CN218093301U/en active Active
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