CN216429827U

CN216429827U - Fan blade structure of vertical axis wind turbine

Info

Publication number: CN216429827U
Application number: CN202122483561.XU
Authority: CN
Inventors: 林碧霞
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-10-15
Filing date: 2021-10-15
Publication date: 2022-05-03
Anticipated expiration: 2031-10-15

Abstract

A fan blade structure of a vertical axis wind turbine comprises a blade main body and at least one reinforcing beam, wherein the blade main body is made of composite materials and surrounds and defines a spirally extending inner space, and the reinforcing beam is made of the composite materials and is integrally formed with the blade main body. The blade body has two inner surfaces located in the interior space and facing each other. The at least one reinforcing beam is located in the inner space and includes two connecting portions integrally connected to the inner surfaces, respectively, and a support portion connected to the connecting portions. The blade main body is integrally formed without a seam, and can avoid the gradual crack or damage of a joint part under long-term use. The at least one reinforcing beam can increase the supporting force to strengthen the structural strength of the blade main body, improve the problem of insufficient structural strength of the traditional fan blade, obtain higher rigidity and effectively resist strong airflow and severe environment in a wind field.

Description

Fan blade structure of vertical axis wind turbine

Technical Field

The utility model relates to a aerogenerator's part especially relates to a flabellum structure of perpendicular aerogenerator.

Background

Referring to fig. 1, a vertical axis wind turbine 1 is one of wind turbines, and is characterized in that a rotating shaft 11 is perpendicular to a wind direction, and blades 12 are spaced around the rotating shaft. The vertical axis wind turbine 1 has an advantage in that it can be operated without aligning the wind direction, thus eliminating many complicated mechanical adjusting devices to align the blades with the wind direction, and enabling stable and reliable power generation efficiency in an environment with large variation in wind direction or wind speed, such as turbulence or gust. However, each blade 12 of the conventional vertical axis wind turbine 1 is usually formed by welding or adhering two shells, and the interior of each shell is hollow to reduce weight and material consumption. The blade structure is often cracked or damaged by the joint seam of the joint when the blade structure is used for a long time, and the hollow blade has the problem of insufficient strength, so that the blade structure of the conventional vertical axis wind turbine 1 still needs to be improved.

Disclosure of Invention

An object of the utility model is to provide a good vertical axis aerogenerator's of integrated into one piece and structural strength flabellum structure.

The utility model discloses vertical axis aerogenerator's flabellum structure, the flabellum structure contain around the blade main part that defines out the inner space that the spiral extends, and with blade main part integrated into one piece's at least one reinforcement roof beam, the blade main part has and is located in just facing two internal surfaces each other in the inner space, at least one reinforcement roof beam is located in the inner space to including respectively a body coupling two connecting portions of internal surface, and connect the bearing portion of connecting portion.

The purpose of the utility model and the technical problem thereof can be further realized by adopting the following technical measures.

Preferably, in the fan blade structure of the vertical axis wind turbine, the blade body and the at least one reinforcing beam are made of carbon fiber reinforced polymer.

The utility model discloses a profitable effect lies in: the blade main body is integrally formed without seams, so that the blade can be prevented from being gradually cracked or damaged at joints under the condition of long-term use, the requirements of a die can be reduced, the post-treatment procedures can be reduced, and the effect of reducing the cost can be achieved. The at least one reinforcing beam can increase the supporting force to strengthen the structural strength of the blade main body, improve the problem of insufficient structural strength of the traditional fan blade and have higher rigidity.

Drawings

FIG. 1 is a perspective view illustrating a conventional vertical axis wind turbine;

FIG. 2 is a perspective view illustrating a vertical axis wind turbine to which the fan blade structure of the present invention is applied;

FIG. 3 is a bottom view illustrating a bottom view of the vertical axis wind turbine;

FIG. 4 is a perspective view, partially in section, illustrating an embodiment of the fan blade structure of the present invention;

FIG. 5 is a cross-sectional view illustrating a top-down cross-sectional aspect of the embodiment;

FIG. 6 is a perspective view, partially in section, illustrating another aspect of the embodiment;

FIG. 7 is a flow chart illustrating a method of manufacturing the embodiment;

FIGS. 8 to 10 are schematic views for explaining the flow of the manufacturing method of FIG. 7; and

FIG. 11 is a schematic view illustrating an arrangement in which only a single airbag is used in the manufacturing method shown in FIG. 7.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and examples.

Referring to fig. 2, 3 and 4, the embodiment of the blade structure 2 of the vertical axis wind turbine of the present invention is generally applied to a vertical axis wind turbine, and the vertical axis wind turbine includes a rotating shaft 3 connected to other motor components, a plurality of blade structures 2 annularly arranged around the rotating shaft 3 at intervals, and a plurality of connecting members 4 connecting the blade structures 2 and the rotating shaft 3.

Referring to fig. 3, 4, and 5, the fan blade structure 2 includes a blade body 21, and a reinforcing beam 22 disposed in the blade body 21. The blade body 21 and the reinforcing beam 22 are integrally formed by a composite material, in this embodiment, the blade body 21 and the reinforcing beam 22 are made of a Polymer composite material, and may be made of Carbon Fiber Reinforced Polymer (CFRP) using epoxy resin as a base material and Carbon Fiber or fiberglass as a reinforcing material, but not limited thereto. The blade body 21 is twisted and extended (refer to fig. 2), and defines an inner space 211 spirally extending in the same direction as the twisting direction of the blade body 21. The blade body 21 has two inner surfaces 212 facing each other in the inner space 211, and the inner surfaces 212 may be spaced apart from each other without contact or may be connected at both side ends (or one side end) depending on the shape of the blade body 21. The reinforcing beam 22 is located in the internal space 211 and has an H-shaped cross section, and the reinforcing beam 22 includes two connecting portions 221 integrally connected to the inner surfaces 212, respectively, and a support portion 222 connected to the connecting portions 221. The blade body 21 and the reinforcing beam 22 are integrally formed, so that the situation that the damage of the existing blade rapidly spreads due to the burst of the joint can be avoided, the blade body 21 is made of a composite material, the blade structure 2 can be kept light by matching with a hollow design, the rigidity of bending resistance and shearing resistance is increased through the reinforcing beam 22, and the integral structural strength is improved. Referring to fig. 6, the present embodiment may also include a plurality of reinforcing beams 22 as shown in fig. 6, wherein the reinforcing beams 22 are spaced apart along the extending direction of the inner surface 212, which may provide a stronger supporting force and provide another implementation option.

Referring to fig. 7 to 10, the following describes the manufacturing method of the present embodiment, including a laminating step 41, a placing step 42, and a forming step 43. In the laminating step 41, a plurality of formed silicone rubber core molds are prepared, a plurality of pieces of resin-impregnated carbon fiber prepreg (or unidirectional fibers) are attached to the silicone rubber core molds, and then other pieces of carbon fiber prepreg are laminated to a desired thickness and strength, thereby forming a plurality of carbon fiber prepreg laminates 5, and the carbon fiber prepreg laminates 5 are staggered with each other to have a preferable force transmission characteristic. In the stacked structure of the carbon fiber prepreg 5, most of the carbon fiber prepreg 5 surrounds the inner space 211 at the outer ring, and a few of the carbon fiber prepreg 5 are transversely arranged at the center of the inner space 211, so as to divide the inner space 211 into two areas 213, theThe silicone rubber core molds are respectively positioned in the areas 213, and after the sufficient strength and thickness are achieved, the silicone rubber core molds are drawn out of the carbon fiber prepreg laminates 5, so that the areas 213 are left empty. In the placing step 42, two uninflated air bags 7 are respectively inserted into the areas 213, and the carbon fiber prepreg laminate 5 together with the air bags 7 is placed in a cavity of a mold 6 (in this case, the mold 6 is not closed, and the above-mentioned member is placed in one of an upper mold and a lower mold), and the air bags 7 are respectively connected to a blowing nozzle penetrating out of the mold 6. The air bag 7 is made of nylon, silicon rubber or other materials which can resist the high temperature of more than 130 ℃. In the molding step 43, the mold 6 is closed and sent to a hot press to be heated at 130-150 ℃ for about 30 minutes, and air is injected into the air bag 7 through a blowing nozzle to expand the air bag 7 outwards to extrude the carbon fiber prepreg laminate 5 (the pressure of the air bag 7 is about 1-10 kg/cm)²Preferably 7 kg/cm²) The carbon fiber prepreg laminate 5 is hot-pressed and molded under the extrusion of the air bag 7 and high temperature, and after the molding is completed and the mold is opened, the fan blade structure 2 shown in fig. 10 can be obtained.

When the blade structure 2 having the plurality of reinforcing beams 22 is to be manufactured, a plurality of silicone core molds may be inserted at intervals in the laminating step 41 to divide the internal space 211 into two or more regions 213, and a plurality of air bags 7 may be inserted in the regions 213, respectively, in the placing step 42, so that the blade structure 2 having the plurality of reinforcing beams 22 is molded in the molding step 43. In the placing step 42, only one bent airbag 7 may be used as shown in fig. 11, and the airbag 7 may be bent into two sections as shown in fig. 11 and respectively penetrate into the two regions 213, so that the above-mentioned process can be completed for one airbag 7, and of course, the extension length of the support portion 222 of the reinforcing beam 22 of the fan blade structure 2 made of the airbag 7 is slightly shorter.

To sum up, the utility model discloses can possess sufficient structural strength when maintaining whole lightweight to obtain higher rigidity, and endure powerful air current and adverse circumstances in the wind field effectively, just blade main part 21 reaches reinforcement roof beam 22 integrated into one piece's design can not only avoid beginning to burst by the seam of junction, also makes reinforcement roof beam 22 can cooperate blade main part 21 twists reverse the appearance that the spiral extends, avoids adopting the combination formula design and causes the difficulty in the assembly, reduces the quantity of mould and reduce the process on the aftertreatment processing, reaches the efficiency that reduces manpower and cost, so can reach the purpose of cost utility model really.

Claims

1. A fan blade structure of a vertical axis wind turbine is characterized in that: the flabellum structure contain around the blade main part of defining out the inner space that the spiral extends, and with blade main part integrated into one piece's at least one reinforcement roof beam, the blade main part has and is located in the inner space and towards two internal surfaces each other, at least one reinforcement roof beam is located in the inner space to including respectively an organic whole connection two connecting portions of internal surface, and connect the bearing portion of connecting portion.

2. The fan blade structure of a vertical axis wind turbine as claimed in claim 1, wherein: the fan blade structure comprises a plurality of reinforcing beams, and the reinforcing beams are arranged at intervals along the extending direction of the inner surface.