Vortex generator for generating fan blade and fan blade

Abstract

The utility model relates to the technical field of generating fans, in particular to a generating fan blade vortex generator and a fan blade, the generating fan blade vortex generator comprises a base, a first fin and a second fin, the first fin and the second fin are detachably connected to the base; inserting grooves are formed in the two sides of the base, and the length of the inserting grooves is larger than the length of the first wing piece and the length of the second wing piece; wherein the first ends of the first fin and the second fin are rotatably connected to the first end of the slot. According to the vortex generator, the design that the base and the fins are separated is adopted, different shapes and sizes of the fins can be flexibly selected according to design requirements, the relative angle between a pair of fins can be adjusted, and the fins can be assembled only according to design requirements, so that the mold can be matched with fan blades of more models, and the production efficiency is improved. And the adaptability is improved, and the difficulty of manufacturing different molds according to different parameters can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of wind turbine technology, and more specifically to a wind turbine blade vortex generator and wind turbine blades. Background Technology

[0002] A vortex generator is a small-aspect-ratio winglet that is vertically mounted on the surface of a wind turbine blade at a certain installation angle. When the airflow passes through the vortex generator, it generates high-energy wingtip vortices. These vortices mix with the low-energy boundary layer flow downstream, injecting new vortex energy into the boundary layer. This gives the boundary layer flow field in the adverse pressure gradient additional energy, allowing it to continue to adhere to the airframe surface without separating.

[0003] The main function of eddy current generators on wind turbine blades is to delay stall initiation and reduce or suppress stall-induced vibration. This helps improve the blade's wind resistance, reduce in-plane loads and vibrations, and may also increase power generation. To achieve suppressed flow separation and increase the blade's output power, eddy current generators are typically installed on the suction surface from the blade root to the middle region of the wind turbine blade.

[0004] The effectiveness of vortex generators is influenced by various factors, including their shape, geometric parameters, and installation location. For example, different series of airfoils with varying thicknesses respond differently to various influencing factors, requiring individual design and development when designing vortex generators. Therefore, the base and airfoils of vortex generators are designed differently according to different requirements. Utility Model Content

[0005] In view of the technical problems existing in the eddy current generator in the prior art, the first aspect of this utility model proposes an eddy current generator for wind turbine blades, including a base, a first blade and a second blade, wherein the first blade and the second blade are detachably connected to the base.

[0006] The base has slots on both sides, and the length of the slots is greater than the length of the first wing and the second wing;

[0007] The first end of the first wing and the second wing are rotatably connected to the first end of the slot, and the second end of the first wing and the second wing are connected to the second end of the slot through a threaded connector, so that the first wing and the second wing form a predetermined angle with the central axis of the base.

[0008] Preferably, the base includes a base plate and a cover plate, the cover plate is fixed to one side of the base plate, and the cover plate has outwardly extending limiting plates on both sides, forming the slot between the limiting plates and the base plate.

[0009] Preferably, the first and second wings each comprise a support plate and a guide vane connected above the support plate, and the support plate and the guide vane are perpendicular to each other.

[0010] Preferably, the thickness of the support plate is the same as the thickness of the slot.

[0011] Preferably, the first end of the slot is provided with an arc-shaped recess, and the first end of the support plate is provided with a disc-shaped connecting structure capable of extending into the arc-shaped recess and rotating relative to the arc-shaped recess with the center of the arc-shaped recess as the axis.

[0012] Preferably, the end of the support plate away from the disc-shaped connecting structure is provided with a positioning groove, and the threaded connecting piece can pass through the positioning groove and the bottom plate to fix the support plate and the bottom plate to each other.

[0013] Preferably, the guide vane is configured as a triangular or isosceles trapezoidal sheet structure.

[0014] The second aspect of the utility model provides a kind of fan blade, the blade is installed with multiple above-mentioned power fan blade vortex generator;

[0015] Wherein, the vortex generator is installed at the position close to the leading edge of the blade.

[0016] Compared with prior art, the utility model has the advantages that:

[0017] The vortex generator provided by the utility model adopts the separation design of base and wing, the wing can not only be flexibly selected in different shapes and sizes according to design requirements, but also can adjust the relative angle between a pair of wings, and only needs to be assembled according to design requirements, so that the mold can be adapted to more models of fan blades, the adaptability is improved, and the difficulty of manufacturing different molds according to different parameters can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0018] The accompanying drawings are not intended to be drawn to scale. In the drawings, each identical or nearly identical component that is illustrated in various figures can be represented by a like numeral. For purposes of clarity, not every component can be called out in every drawing. There is now being described, by way of example, embodiments of various aspects of the utility model with reference to the accompanying drawings in which:

[0019] Figure 1 is the schematic view of the separation state of base and wing in the power fan blade vortex generator provided by the utility model;

[0020] Figure 2 is the schematic view of the installation of wing to base in the power fan blade vortex generator shown by the utility model;

[0021] Figure 3 is the structure schematic view of the slot and the arc-shaped groove shown in the utility model;

[0022] Figure 4 is the schematic view of the distribution of the plurality of vortex generators on the fan blade shown in the utility model. DETAILED DESCRIPTION

[0023] In order to understand the technical content of the utility model more, specific embodiments are raised and the following is described with the aid of the accompanying drawings.

[0024] In combination with Figure 1 shown, the first aspect of the utility model proposes a power generation fan blade vortex generator, including base 10, first wing piece 20a and second wing piece 20b, first wing piece 20a and second wing piece 20b are detachably connected to base 10.

[0025] The base 10 and the two wing pieces are designed in the form of detachable, can according to actual demand, the size and shape of first wing piece 20a and second wing piece 20b are flexibly changed, the base 10 can be used as the structure that can adapt to first wing piece 20a and second wing piece 20b, need not be replaced with different requirements, therefore, the flexibility of vortex generator use is improved as a whole.

[0026] In combination with Figure 1 shown, both sides of base 10 are equipped with slot 101, the length of slot 101 is greater than the length of first wing piece 20a and second wing piece 20b;The first end of first wing piece 20a and second wing piece 20b is rotatably connected to the first end of slot 101, and the second end of first wing piece 20a and second wing piece 20b is connected to the second end of slot 101 by threaded connecting piece 23.

[0027] In this way, first wing piece 20a and second wing piece 20b can be adjusted to the design angle according to the design requirement before being installed to the fan blade, that is, first wing piece 20a and second wing piece 20b form a predetermined included angle with the central axis of base 10.

[0028] In the optional embodiment, in combination with Figure 1 and Figure 2 shown, base 10 includes bottom plate 11 and cover plate 12, and cover plate 12 is fixed to one side of bottom plate 11.

[0029] Among them, bottom plate 11 and cover plate 12 are all made of stainless steel plate, and bottom plate 11 and cover plate 12 are welded to form base 10 by partition plate, both sides of cover plate 12 are equipped with outwardly extending limiting plate 121, slot 101 is formed between limiting plate 121 and bottom plate 11, and first wing piece 20a and second wing piece 20b are connected to the slot 101 on both sides respectively.

[0030] In optional embodiments, the first wing 20a and the second wing 20b each include a support plate 21 and a guide vane 22 connected above the support plate 21, and the support plate 21 and the guide vane 22 are perpendicular to each other.

[0031] The thickness of the support plate 21 is the same as the thickness of the slot 101.

[0032] Therefore, when the support plate 21 is inserted into the slot 101, the guide vanes 22 are located outside the slot 101, and the air flow forms a high-energy tip vortex through the two guide vanes 22, so as to improve the adhesion of the air and the fan blade.

[0033] According to different design requirements, the guide vanes 22 can be different shapes, for example, the guide vanes 22 are configured as triangular or isosceles trapezoidal sheet structures.

[0034] In combination with Figure 2 and Figure 3 As shown in the drawings, the first end of the slot 101 is provided with an arc-shaped groove 122, and the first end of the support plate 21 is provided with a disc-shaped connecting structure 211, which can be inserted into the arc-shaped groove 122 and can rotate relative to the arc-shaped groove 122 with the center of the arc-shaped groove 122 as the axis.

[0035] Therefore, after the disc-shaped connecting structure 211 is connected into the arc-shaped groove 122, the arc surface on the outside thereof is attached to the inner wall surface of the arc-shaped groove 122, so that the first end of the support plate 21 can be freely rotated in the arc-shaped groove 122, and when the second end of the support plate 21 is adjusted, the angle of the guide vane 22 changes, and when it is adjusted to the appropriate angle, the second end of the support plate 21 is fixed.

[0036] In optional embodiments, the limiting plate 121 is provided with a window 102 near the second end of the support plate 21, and the end of the support plate 21 away from the disc-shaped connecting structure 211 is provided with a positioning groove 212, and the threaded connecting piece 23 can pass through the positioning groove 212 and the bottom plate 11, so that the support plate 21 and the bottom plate 11 are fixed to each other, and the threaded connecting piece 23 is exposed at the position of the window 102.

[0037] Specifically, the threaded connecting piece 23 can be a screw, according to the design angle, a screw hole is drilled at the position of the window 102 using a tool, and then the screw passes through the positioning groove 212 and the screw hole on the bottom plate 11, so that the support plate 21 and the bottom plate 11 are fixed.

[0038] The second aspect of the utility model discloses a technical scheme, a fan blade, the blade is installed with a plurality of above-mentioned power generation fan blade vortex generator;

[0039] Among them, the vortex generator is installed at the position close to the leading edge of the blade.

[0040] In combination with Figure 4As shown, the lower arc line of the figure is the position of the leading edge of the blade, and the upper arc line is the position of the trailing edge of the blade, a plurality of vortex generators are installed to the fan blade, specifically, the plurality of vortex generators are divided into three length sections, for example, a first length section, a second length section and a third length section, the plurality of vortex generators in each length section are linearly distributed, the first length section is arranged at a distance of 2m to 4.5m from the blade root, the second length section is arranged at a distance of 4.5m to 7.5m from the blade root, and the third length section is arranged at a distance of 7.5m to 13.5m from the blade root.

[0041] In combination with the above embodiment, the vortex generator adopts the separation design of the base and the fin, the fin can not only flexibly select different shapes and sizes according to design requirements, but also adjust the relative angle between a pair of fins, and only needs to be assembled according to design requirements, therefore, the mold can adapt to more models of fan blades, the adaptability is improved, and the difficulty of manufacturing different molds according to different parameters can be reduced.

[0042] Although the utility model has disclosed as above with preferred embodiments, it is not used to limit the utility model. Those skilled in the art to which the utility model belongs can make various changes and decorations without departing from the spirit and scope of the utility model. Therefore, the protection scope of the utility model shall be subject to the definition of the claims.

Claims

1. A power generating wind turbine blade vortex generator, characterized by, The base (10), the first wing (20a) and the second wing (20b) are detachably connected to the base (10); The base (10) is provided with a slot (101) on both sides, and the length of the slot (101) is greater than the length of the first wing (20a) and the second wing (20b); The first end of the first wing (20a) and the second wing (20b) is rotatably connected to the first end of the slot (101), and the second end of the first wing (20a) and the second wing (20b) is connected to the second end of the slot (101) through a threaded connecting piece (23), so that the first wing (20a) and the second wing (20b) form a predetermined angle with the central axis of the base (10).

2. The power generating fan blade vortex generator of claim 1, wherein, The base (10) includes a bottom plate (11) and a cover plate (12), the cover plate (12) is fixed to one side of the bottom plate (11), and the cover plate (12) is provided with a limiting plate (121) extending outward on both sides, and the slot (101) is formed between the limiting plate (121) and the bottom plate (11).

3. The power generating fan blade vortex generator of claim 1, wherein, The first wing (20a) and the second wing (20b) each include a support plate (21) and a guide vane (22) connected above the support plate (21), and the support plate (21) and the guide vane (22) are perpendicular to each other.

4. The power generating fan blade vortex generator of claim 3, wherein, The thickness of the support plate (21) is the same as the thickness of the slot (101).

5. The power generating fan blade vortex generator of claim 3, wherein, The first end of the slot (101) is provided with an arc-shaped groove (122), and the first end of the support plate (21) is provided with a disc-shaped connecting structure (211), which can extend into the arc-shaped groove (122) and rotate relative to the arc-shaped groove (122) with the center of the arc-shaped groove (122) as the axis.

6. The power generating fan blade vortex generator of claim 5, wherein, The end of the support plate (21) away from the disc-shaped connecting structure (211) is provided with a positioning groove (212), and the threaded connecting piece (23) can pass through the positioning groove (212) and the bottom plate (11), so that the support plate (21) and the bottom plate (11) are fixed to each other.

7. The power generating fan blade vortex generator of claim 3, wherein, The guide vane (22) is configured as a triangular or isosceles trapezoidal sheet structure.

8. A wind turbine blade, characterised in that A plurality of power generating fan blade vortex generators according to any one of claims 1-7 are installed on the blade; Wherein, a plurality of the vortex generators are installed on the blade near the leading edge.

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