CN111120200A

CN111120200A - Efficient wind driven generator blade

Info

Publication number: CN111120200A
Application number: CN201911362282.9A
Authority: CN
Inventors: 薛冻
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-12-26
Filing date: 2019-12-26
Publication date: 2020-05-08

Abstract

The invention discloses a high-efficiency wind driven generator blade which comprises a blade handle and a blade body, wherein the blade handle is used for being connected with a turbine hub of a generator; one or more through grooves are transversely arranged on the windward side of the blade body. According to the invention, the through grooves are formed in the generator blade, so that the wind captured by the blade can flow along the through grooves under the constraint of the through grooves, more wind power is converted into a driving force for driving the blade to rotate, and the wind quantity flowing from the blade handle to the blade tip direction is reduced. The cross-sectional area that leads to the groove reduces along the flow direction of wind gradually, and the wind that gets into logical inslot portion can be discharged after accelerating, can increase its driving force to the paddle to increase the driving force to the turbine, and then will catch wind more turn into kinetic energy and drive the generator electricity generation. The invention can also be used for improving the existing wind driven generator blade, thereby improving the working efficiency of the wind driven generator blade.

Description

Efficient wind driven generator blade

Technical Field

The invention relates to the field of wind power generation equipment, in particular to a high-efficiency wind driven generator blade.

Background

The current wind driven generator adopts a power generation mode that wind power drives a turbine to rotate so as to drive a generator to generate power. The blade on the turbine used at present is a propeller type blade with a smooth surface, when wind blows to a wind driven generator, airflow acts on the surface of the blade and is divided into thrust along the axial direction of the generator and thrust along the tangential direction of the blade, and only the part of the tangential thrust can push the turbine to rotate so as to generate electricity. However, because the surfaces of the blades are smooth, due to the characteristics of the propeller type impeller, a part of wind flows from the center of the turbine to the tip direction of the blades along the blades, and the part of wind captured by the blades cannot push the turbine to rotate and is wasted, so that the working efficiency of the turbine is influenced.

Disclosure of Invention

Bionics is a principle that human beings work by studying the structure and functions of organisms in the nature, and is inspired by the principle, new equipment, tools and technologies can be invented, and advanced technologies suitable for production, learning and life are created. Birds have evolved in billions of years with wings that have been progressively optimized to meet aerodynamic requirements in order to be able to adapt to air flight. When the feathers of the birds are carefully observed, the surface of the feathers is not flat, but the feathers are provided with a plurality of fine grooves, so that the air flow direction of the air flows towards the direction which is favorable for the birds to fly when the air flows on the surfaces of the feathers, and the birds can save more labor when flying.

Through careful research on bird feathers, the invention provides the high-efficiency wind driven generator blade which is used for improving the efficiency of a turbine of the wind driven generator and converting more wind energy into electric energy.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

a high-efficiency wind driven generator blade comprises a blade handle and a blade body, wherein the blade handle is used for being connected with a turbine hub of a generator; one or more through grooves are transversely arranged on the windward side of the blade body.

Further, the cross-sectional area of the through groove gradually decreases along the flow direction of the wind inside the through groove.

Furthermore, the cross section of the through groove is rectangular, and the two adjacent surfaces of the through groove are in smooth transition.

Further, the through groove is arranged below the surface of the blade body.

Furthermore, the through groove is positioned above the surface of the paddle body, patches are arranged on two sides of the through groove, and the patches are fixedly connected with the paddle body.

Furthermore, two side faces of the through groove are provided with included angles.

Furthermore, an included angle is formed between the bottom surface of the through groove and the plane where the top of the through groove is located.

The invention has the positive effects that:

according to the invention, the through grooves are formed in the generator blade, so that the wind captured by the blade can flow along the through grooves under the constraint of the through grooves, more wind power is converted into a driving force for driving the blade to rotate, and the wind quantity flowing from the blade handle to the blade tip direction is reduced. The cross-sectional area that leads to the groove reduces along the flow direction of wind gradually, and the wind that gets into logical inslot portion can be discharged after accelerating, can increase its driving force to the paddle to increase the driving force to the turbine, and then will catch wind more turn into kinetic energy and drive the generator electricity generation. The invention can also be used for improving the existing wind driven generator blade, thereby improving the working efficiency of the wind driven generator blade.

Drawings

FIG. 1 is a schematic structural view of the windward side in embodiment 1 of the present invention;

FIG. 2 is an enlarged view of a portion G of FIG. 1;

FIG. 3 is a cross-sectional view of the channel at location A-A of FIG. 2;

FIG. 4 is a schematic view of wind flowing in a through slot;

fig. 5 is a schematic cross-sectional view of a through groove in embodiment 2 of the present invention;

in the figure, 1, a blade handle; 2. a blade body; 3. a through groove; 4. a hub; 5. and (3) pasting.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Example 1

As shown in fig. 1 to 4, the blade of the high-efficiency wind driven generator comprises a blade body 2, wherein a plurality of through grooves 3 are formed in the windward side of the blade body 2, the through grooves 3 are located below the surface of the blade body 2, and the direction of the central plane of each through groove 3 is consistent with the direction of the cross section of the blade body 2. The root of the blade body 2 is provided with a blade handle 1 which is used for being connected with a hub 4 at the center of a turbine of the wind driven generator. The direction of the arrows outside the numbered lines in fig. 4 is the direction of the wind flow over the blades. Due to the self wind searching function of the wind driven generator, the plane of the turbine is always vertical to the incoming wind direction, so that the windward side of the blade body 2 is always unchanged, the flowing direction of wind in the through groove 3 cannot be changed, and the wind always flows from one side close to the front end of the hub 4 to one side close to the rear end of the hub 4. After wind blows to the windward side of the blade body 2 along the central shaft of the hub 4, the wind entering the through groove 3 under the action of the through groove 3 flows out from the rear end of the through groove 3, so that the blade body 2 is pushed to rotate along the center of the hub 4, and the flowing wind in the direction is the highest in efficiency when pushing the blade body 2 to rotate because the direction of the through groove 3 is consistent with the direction of the cross section of the blade body 2. The through grooves 3 arranged on the blade body 2 can also generate resistance to wind flowing from the blade handle 1 to the blade tip, reduce the flow amount of the wind in the direction, and enable more wind to enter the through grooves 3 and flow along the through grooves 3, thereby improving the working efficiency of the blade.

Two side surfaces of the through groove 3 are gradually close to the central surface of the through groove 3 along the flowing direction of wind, so that the cross section area of the through groove 3 is gradually reduced along the flowing direction of the wind. Therefore, the wind is gradually compressed and accelerated while flowing in the through-groove 3, and is finally discharged along the wind outlet end of the through-groove 3. The accelerated wind can improve the driving force of the wind on the blade body 2, thereby improving the working efficiency of the blade.

Smooth transition is formed between two adjacent surfaces of the through grooves 3, and the blade body 2 can be prevented from being broken due to stress concentration at the through grooves 3.

Example 2

The present embodiment differs from embodiment 1 in that the through grooves 3 are located above the surface of the blade body 2.

As shown in fig. 5, a plurality of patches 5 are adhered to the blade body 2 at certain intervals, the patches 5 are strip-shaped, a through groove 3 is formed between two adjacent patches 5, and the shape of the side surface of each patch 5 is matched with the shape of the side surface of the through groove 3. Therefore, the existing wind driven generator blade can be modified by adopting the method of sticking the patch 5, and the efficiency of the existing blade is improved by sticking the patch 5.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; it is obvious as a person skilled in the art to combine several aspects of the invention. And such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. The high-efficiency wind driven generator blade is characterized by comprising a blade handle (1) connected with a turbine hub (4) of a generator and a blade body (2) fixedly connected with the blade handle (1); one or more through grooves (3) are transversely arranged on the windward side of the blade body (2).

2. A wind turbine blade according to claim 1, characterised in that the cross-sectional area of the through slots (3) decreases gradually in the direction of the wind flow inside them.

3. A high efficiency wind power generator blade according to claim 1 wherein said through slots (3) are rectangular in cross-section and the adjacent two faces of said through slots (3) are rounded off.

4. A wind turbine blade according to claim 1, characterised in that the through slots (3) are arranged below the surface of the blade body (2).

5. A blade for a high efficiency wind powered generator as claimed in claim 1 characterised in that said through slot (3) is located above the surface of the blade body (2), and that patches (5) are located on both sides of said through slot (3), said patches (5) being fixedly connected to the blade body (2).

6. A wind turbine blade according to claim 2, characterised in that the slots (3) are angled on both sides.

7. A wind turbine blade according to claim 2, characterised in that the bottom surface of the through slot (3) is angled with respect to the plane of the top thereof.