A blade part for use in wind turbines

Abstract

The invention relates to a blade part (20) for a wind turbine (10). The novelty of the invention is characterized in that it comprises at least one first blade part (21) and a second blade part (22); the blade part (20) comprises also a first channel (30) and a second channel (31); each blade part (20) comprises a part of the first channel (30) and a part of the second channel (31); the blade part (20) comprises also a first beam (32) and a second beam (33); the first beam (32) is arranged in the first channel (30) and in particular in the parts of the first channel (30), and the second beam (33) is arranged in the second channel (31) and in particular in the parts of the second channel (31); a movement of the first blade part (21) relative to the second blade part (22) is prevented or restricted by the beams.

Description

[0001] A BLADE PART FOR USE IN WIND TURBINES

[0002] TECHNICAL FIELD

[0003] The invention relates to a modular blade part for use in the wind turbines.

[0004] PRIOR ART

[0005] The wind turbines are the machines that generate electricity by converting the movement energy in the wind into the mechanical energy. Various wind turbine models have been developed to benefit from the wind energy with a maximum efficiency and minimum cost. The wind turbines are divided into the horizontal axis and vertical axis wind turbines. The vertical axis wind turbines are a type of wind turbine in which the main rotor shaft is positioned vertically according to the direction of the wind, and other basic system elements such as the gearbox and electric motor are located on the underside of the turbine. It is known as a vertical axis wind turbine since it is designed perpendicular to the direction of the wind.

[0006] In the vertical axis wind turbines, the fact that the gearbox and generator are close to the ground provides great convenience in terms of maintenance and repair, and therefore there is no need for a wind turbine tower. In addition, the vertical axis wind turbines do not need to be directed towards the wind since it can produce electricity by taking the wind from all directions with its vertical structure. For this reason, the vertical axis wind turbines do not have the sensors and mechanisms that detect the wind direction and move the turbine in the wind direction.

[0007] The Application No. US2010143143A1 , known in the literature, relates to the wind turbine rotor blades in general and more specifically to a partite rotor blade for a wind turbine. A rotor blade for a wind turbine comprises a large number of separate blade sections in which each blade part defines an inner passage that extends between the longitudinal ends of the blade section. A rigid mast member extends longitudinally along the inner passages of the individual blade parts, such that the blade parts are aligned and connected end-to-end on said mast member to define a complete rotor blade from a root to a blade tip. The mast member has a cross-sectional profile in which the blade parts match the cross-sectional profile of the inner passage. The mast element comprises the opposing mast headers that are attached to the inner surfaces of the blade rings within the inner passages.

[0008] The Application No. EP1888917, known in the literature, relates to the wind turbines and more specifically to the vertical axis wind turbines. The wind turbine may comprise an upper ring, a middle ring, and a lower ring. Here, a large number of vertical air profiles are placed between the rings. For example, three vertical blades can be installed between the upper ring and the middle ring. In addition, three more vertical blades can be installed between the lower ring and the middle ring. When the wind touches the vertically arranged air profiles, the rings begin to rotate. Electricity can be generated from the wind by connecting the rings to a center mast that rotates an alternator.

[0009] The traditional art applied for the production of the blades used in the wind turbines is currently seen as a composite production method, such as the manual tilting method. With this method, the polymer matrix composite materials are produced for the wind turbine blades. In the traditional composite production methods used, the non- environmentally friendly and non-recyclable materials are produced due to the nature of the composite material. For example, the composite material produced in the glass fiber applications of thermoset resins, which are widely used in the production of polymer matrix doped composite materials, does not undergo a biological degradation. Although there is no suitable disposal method for the non-biodegradable materials, there is no standardized procedure for recycling the material when these materials are to be recycled.

[0010] The disadvantages of producing the vertical wind turbine blades with the composite materials by the hand tilting method such as high production time, high costs, inability to protect the aerodynamic profile on the end surfaces of the produced parts due to the nature of the production method, and the inability to recycle the produced material arise when the same part is produced by the method of producing a continuous part from the structures that can be connected to each other with the identical blocks.

[0011] As a result, all the above-mentioned problems have made it necessary to realize a novelty in the relevant technical field. BRIEF DESCRIPTION OF THE INVENTION

[0012] The present invention relates to a blade for a wind turbine to eliminate the above- mentioned disadvantages and bring the new advantages to the relevant technical field.

[0013] An object of the invention is to introduce a blade part for modularizing the wind turbines.

[0014] Another object of the invention is to produce a blade part with a reduced molding cost and reduced assembly time during the manufacture of the wind turbines.

[0015] Another object of the invention is to produce a blade part in which the manual tilting method in the wind turbines is eliminated.

[0016] Another object of the invention is to produce a recyclable blade part that replaces the non-recyclable products such as thermoset-doped glass fiber composites in the wind turbines.

[0017] In order to accomplish all the objects mentioned above and to be revealed from the detailed description below, the present invention is a modular blade part for use in the wind turbines. Accordingly, the novelty is that it comprises at least one first blade part and a second blade part; the blade part comprises also a first channel and a second channel; each blade part comprises a part of the first channel and a part of the second channel; the blade part comprises also a first beam and a second beam; the first beam is arranged in the first channel and in particular in the parts of the first channel, and the second beam is arranged in the second channel and in particular in the parts of the second channel; a movement of the first blade part relative to the second blade part is prevented or restricted by the beams. Thus, a modular wind turbine with a facilitated manufacturing is obtained.

[0018] A possible embodiment of the invention is characterized in that it comprises at least one first blade part and a second blade part; the blade part comprises also a first channel, each blade part comprises a part of the first channel; the blade part comprises also a first beam; the first beam is arranged in the first channel and in particular in the parts of the first channel, the blade parts form a positive lock with each blade part of the beam such that rotation about the beam is prevented or restricted, and thus, the movement of the blade parts relative to each other is prevented or restricted. Thus, it is ensured that the blade parts are tightly connected to each other.

[0019] Another possible embodiment of the invention is characterized in that the movement is a rotation, and the movement is a rotational movement in at least one direction, in particular in two directions, and two directions of rotation are perpendicular to the first beam and / or the second beam. Thus, the electricity is produced by rotating the blade parts around the shaft.

[0020] Another possible embodiment of the invention is characterized in that the first blade part comprises a connection interface and the second blade part comprises a connection interface, the connection interfaces of the blade parts are joined together. Thus, the first blade part and the second blade part are placed and mounted on one of the connection interfaces.

[0021] Another possible embodiment of the invention is characterized in that the blade parts are fixed to each other by means of a tool-free connection, in particular by means of a clip connection. Thus, it is ensured that the first blade part and the second blade part are locked together.

[0022] Another possible embodiment of the invention is characterized in that the first channel and / or the second channel extend in the longitudinal direction of the blade part, the first channel and / or the second channel are spaced apart in a direction perpendicular to the longitudinal axis of the blade part, and the first channel and / or the second channel are preferably parallel to each other. Thus, an aerodynamic rotational movement is obtained according to the airflow.

[0023] Another possible embodiment of the invention is characterized in that the first channel and / or the second channel are in the form of the holes extending over the blade parts. Thus, it is ensured that the first beam and the second beam extend from end to end in the turbine blade. Another possible embodiment of the invention is characterized in that the number of the blade parts is at least 3, 5, 10, 20, 40, 60, or 70. Thus, a modular turbine blade structure is obtained.

[0024] Another possible embodiment of the invention is characterized in that the blade parts are at least equal in shape and / or material. Thus, ease of manufacturing and assembly is provided.

[0025] Another possible embodiment of the invention is characterized in that at least one blade part comprises two halves, and the part of the first channel and / or the part of the second channel is formed by connecting the two halves together. The halves are connected by means of a tool-free connection, in particular by means of a clip connection. Thus, a modular structure is obtained in the wind turbine.

[0026] Another possible embodiment of the invention is characterized in that it is a wind turbine comprising a blade part, and the wind turbine is a vertical wind turbine. Thus, the structure of a vertical axis wind turbine with a facilitated manufacturing and an increased efficiency is obtained.

[0027] BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Fig. 1 shows a representative front view of the wind turbine on which the blade part of the invention is located.

[0029] Fig. 2 shows a representative perspective view of the turbine blade on which the blade part of the invention is located.

[0030] Fig. 3 shows a representative perspective view of the blade part of the invention.

[0031] Fig. 4 shows a representative top view of the blade part of the invention.

[0032] Fig. 5 shows a representative bottom view of the blade part of the invention.

[0033] Fig. 6 shows a representative side view of the blade part of the invention. Fig. 7 shows a representative front view of the blade part of the invention.

[0034] DETAILED DESCRIPTION OF THE INVENTION

[0035] In this detailed description, the subject of the invention is only described with the examples without any limiting effect for a better understanding of the subject.

[0036] With reference to Fig. 1 , the invention relates to a wind turbine (10). The wind turbine (10) of the invention is a system that converts the kinetic energy in the wind first into the mechanical energy and then into the electrical energy. A wind turbine (10) is essentially a vertical axis wind turbine. The kinetic energy of the wind is converted into the mechanical energy via the turbine blade (13) and transferred to an alternator. The electrical energy obtained from the alternator is stored by the batteries or delivered directly to the receivers. In a possible embodiment of the invention, the wind turbine (10) is used on the highways. By means of a wind turbine (10), the wind kinetics of the vehicles provide the electricity generation.

[0037] Fig. 2 shows a representative perspective view of the turbine blade (13) on which the blade part (20) of the invention is located. Accordingly, the wind turbine (10) comprises at least one shaft (11). Said shaft (11 ) is positioned vertically relative to the ground. There is at least one arm (12) around the shaft (11). There is at least one turbine blade (13) on said arm (12). Said arm (12) ensures that the turbine blade (13) is kept at a predetermined distance around the shaft (11 ). In a possible embodiment of the invention, there are three arms (12) on the shaft (11 ) at the equal angles therebetween. Each of these arms (12) carries a turbine blade (13). The turbine blade (13), on the other hand, is rotated around the shaft (11) in at least one direction, preferably in both directions, by the kinetic energy of the wind. The turbine blade (13) is helically formed around the shaft (11). The turbine blade (13) scans an angle of 120° at the distance through which it extends. Considering that there are 3 turbine blades (13) in the wind turbine (10), it is ensured that the entire area is covered with the turbine blade (13). In a possible embodiment of the invention, the turbine blade (13) can have a height of 3 meters and the turbine blades (13) can be positioned parallel to each other. Thus, an aerodynamic movement is obtained according to the wind movement. Fig. 3 shows a representative perspective view of the blade part (20) of the invention. Accordingly, the turbine blade (13) has a modular structure. There is at least one blade part (20) on the turbine blade (13). Said blade part (20) is the module used to rotate the shaft (11) by the wind part. By juxtaposing a large number of the blade parts (20), the turbine blade (13) form is obtained. In a possible embodiment of the invention, at least 3, 5, 10, 20, 40, 60 or 70 blade parts (20) are placed on top of each other on the turbine blade (13) to obtain a whole. However, the turbine blade (13) can also be produced by combining a different number of blade parts (20), but the invention is not limited thereto. The blade parts (20) on the turbine blade (13) are identical, at least in form and material. In this way, it is ensured that the turbine blade (13) can be produced with the blade part (20) obtained from a single mold form and can be easily assembled

[0038] (12). In a possible embodiment of the invention, the blade part (20) comprises two halves. The part of the first channel (30) and / or the part of the second channel (31 ) is formed by connecting the two halves together. Thus, it is ensured that the blade part (20) has a modular structure.

[0039] Fig. 4 shows a representative top view of the blade part (20) of the invention. Accordingly, the blade parts (20) have their own forms for assembling together. The blade part (20) is mainly manufactured in the form of a naca blade profile. By forming the blade part (20) in this way, an aerodynamic structure is obtained. For this, there is at least one oval end (23) and at least one spike (24) on the blade part (20). Said oval end (23) is located on the side of the blade part (20) facing the shaft (11 ), and said spike (24) is located on the outward-facing side of the blade part (20). The blade part (20) is manufactured in a form tapering from the oval end (23) to the spike (24). The plastic injection method is used in the manufacture of the blade part (20).

[0040] In the turbine blade (13), there are at least one first beam (32) and at least one second beam (33) between the blade parts (20) such that they are tightly connected to each other. Said first beam (32) and the second beam (33) extend along the turbine blade

[0041] (13) and provide the blade parts (20) to rest against each other. For this, there can be at least one first channel (30) and at least one second channel (31) on each blade part (20). The first beam (32) is passed through the first channel (30) and the second beam (33) is passed through the second channel (31). The direction of rotation of the turbine blade (13) is perpendicular to the first beam (32) and the second beam (33). The material of the first beam (32) and the second beam (33) is essentially a carbon fiber. In this way, the rigid position of the blade parts (20) on the turbine blade (13) is maintained against the wind vibrations.

[0042] From here on, in order to describe the assembly of the blade parts (20) together in more detail, the blade parts (20) assembled together will be called a first blade part

[0043] (21 ) and a second blade part (22). The first blade part (21 ) and the second blade part

[0044] (22) are essentially identical. The first blade part (21 ) and the second blade part (22) comprise at least one connection interface (40). The first blade part (21) and the second blade part (22) comprise the connection interfaces (40) that can be assembled together. Said connection interface (40) is of two different types: a first connection interface (41) and a second connection interface (42). The first connection interface (41 ) is formed in such a way that it can be assembled on the second connection interface (42). Thus, the first blade part (21 ) and the second blade part (22), which are placed on top of each other, can be assembled together. In other words, the opposing sides of each blade part (20) have the form of a first connection interface (41) and a second connection interface (42).

[0045] Fig. 5 shows a representative bottom view of the blade part (20) of the invention. Accordingly, on the turbine blade (13), the blade parts (20) are joined by at least one positive lock (50) and at least one clip (60) structure in addition to the first beam (32) and second beam (33). In this way, the blade parts (20) are also connected to each other in a form-fitting manner. The positive lock (50) structure has at least one first part (51 ) and at least one second part (52). This first part (51 ) and the second part (52) are located on the first connection interface (41) and the second connection interface (42), which are essentially joined to each other. The first part (51) is preferably located on the first connection interface (41) and the second part (52) is located on the second connection interface (42). The first part (51) and the second part (52) are interlaced and formed in such a way that they make a form-fitting connection. With the positive lock (50) structure, it is ensured that the first blade part (21) and the second blade part (22) are positioned concentrically with each other. Said clip (60) on the blade part (20) is essentially a claw structure and is seated in a slot (61 ). The clip (60) and slot (61) structure is positioned concentrically on the opposing connection interfaces (40). In a possible embodiment of the invention, the clip (60) is positioned on the first connection interface (41) and the slot (61) is positioned on the second connection interface (42). Fig. 6 shows a representative side view of the blade part (20) of the invention. Accordingly, there is at least one auxiliary centering element (20) and at least one auxiliary centering slot (71) on the blade part (70). Said auxiliary centering element (70) and said auxiliary centering slot (71 ) are interlaced and connected in a form-fitting manner. For this purpose, the auxiliary centering element (70) and the auxiliary centering slot (71) are positioned concentrically on the opposing connection interfaces (40). In a possible embodiment of the invention, the auxiliary centering slot (71) is located on the first connection interface (41 ) and the auxiliary centering element (70) is located on the second connection interface (42).

[0046] Fig. 7 shows a representative front view of the blade part (20) of the invention. Accordingly, there is an alpha angle (a) and at least one beta angle (b) in order to manufacture the turbine blade (13) in a helical form by combining the blade parts (20) with the same form. Said alpha angle (a) is the angle provided at the spike (24) to obtain the whole helix. Said beta angle (b) is the angle on the side of the oval end (23) to obtain the beta angle (b) on the turbine blade (13). These angles may vary depending on the desired angle of the turbine blade (13) and the number of the blade parts (20). With the alpha angle (a) and beta angle (b), it is ensured that the turbine blade (13) can be manufactured by juxtaposing a single blade part (20) in multiple numbers.

[0047] The biggest innovation of this invention compared to the state of the art is that it enables the production of a continuous turbine blade (13) from the blade parts (20) that can be connected to each other with the identical blocks in the blades of the vertical wind turbine (10) produced in one piece. The blade parts (20) formed in the new developed model form the mathematically modeled profile of a turbine blade (13). During this process, they can be connected to each other with the positive lock (50), clip (60) and auxiliary centering element (70) structure located on the connection interfaces (40), and they are ensured to hold each other tightly with the first beam (32) and the second beam (33). The disadvantages of producing the vertical wind turbine blades with the composite materials by the hand tilting method such as high production time, high costs, inability to protect the aerodynamic profile on the end surfaces of the produced parts due to the nature of the production method, and the inability to recycle the produced material are eliminated by connecting the same blade parts (20) to each other and producing a continuous part. In the production of the wind turbine (10), the time is shortened, the cost is reduced and the product becomes lighter. In addition, while the thermoset-doped glass fiber composites produced by the traditional method cannot be recycled, a recyclable wind turbine (10) emerges in the new model presented, as it is produced using a randomly dispersed short fiber-reinforced thermoplastic composite material by the plastic injection method.

[0048] The scope of protection of the invention is described in the attached claims and cannot be limited to what is explained in this detailed description for the exemplary purposes. It is clear that a person skilled in the art can produce similar embodiments in the light of what is explained above, without deviating from the main theme of the invention.

[0049] REFERENCE NUMBERS IN THE DRAWINGS

[0050] 10 Wind Turbine

[0051] 11 Shaft

[0052] 12 Arm

[0053] 13 Turbine Blade

[0054] 20 Turbine Part

[0055] 21 First Turbine Part

[0056] 22 Second Turbine Part

[0057] 23 Oval End

[0058] 24 Spike

[0059] (a) Alpha Angle

[0060] (b) Beta Angle

[0061] 30 First Channel

[0062] 31 Second Channel

[0063] 32 First Beam

[0064] 33 Second Beam

[0065] 40 Connection Interface

[0066] 41 First Connection Interface

[0067] 42 Second Connection Interface 50 Positive Lock

[0068] 51 First Part

[0069] 52 Second Part 60 Clip

[0070] 61 Slot

[0071] 70 Auxiliary Centering Element

[0072] 71 Auxiliary Centering Slot

Claims

CLAIMS1. A blade part (20) for a wind turbine (10), characterized in that it comprises at least one first blade part (21 ) and a second blade part (22); the blade part (20) comprises also a first channel (30) and a second channel (31); each blade part (20) comprises a part of the first channel (30) and a part of the second channel (31); the blade part (20) comprises also a first beam (32) and a second beam (33); the first beam (32) is arranged in the first channel (30) and in particular in the parts of the first channel (30), and the second beam (33) is arranged in the second channel (31) and in particular in the parts of the second channel (31 ); a movement of the first blade part (21) relative to the second blade part (22) is prevented or restricted by the beams.

2. A blade part (20) for a wind turbine (10), characterized in that it comprises at least one first blade part (21 ) and a second blade part (22); the blade part (20) comprises also a first channel (30); each blade part (20) comprises a part of the first channel (30); the blade part (20) comprises also a first beam (32); the first beam (32) is arranged in the first channel (30) and in particular in the parts of the first channel (30), the blade parts (20) form a positive lock (50) with each blade part (20) of the first beam (32) and / or the second beam (33) such that rotation about the first beam (32) and / or the second beam (33) is prevented or restricted, and thus, the movement of the blade parts (20) relative to each other is prevented or restricted.

3. A blade part (20) according to claim 1 or 2, characterized in that the movement is a rotation.

4. A blade part (20) according to any one of the preceding claims, characterized in that the movement is a rotational movement in at least one direction, in particular in two directions.

5. A blade part (20) according to any one of the preceding claims, characterized in that two directions of rotation are perpendicular to the first beam (32) and / or the second beam (33).

6. A blade part (20) according to any one of the preceding claims, characterized in that the first blade part (21 ) comprises a connection interface (40) and the second blade part (22) comprises a connection interface (40), the connection interfaces (40) of the blade parts are joined together.

7. A blade part (20) according to any one of the preceding claims, characterized in that the blade parts (20) are fixed to each other by means of a tool-free connection, in particular by means of a clip (60) connection.

8. A blade part (20) according to any one of the preceding claims, characterized in that the first channel (30) and / or the second channel (31) extend in the longitudinal direction of the blade part (20), the first channel (30) and / or the second channel (31) are spaced apart in a direction perpendicular to the longitudinal axis of the blade part (20), and the first channel (30) and / or the second channel (31) are preferably parallel to each other.

9. A blade part (20) according to any one of the preceding claims, characterized in that the first channel (30) and / or the second channel (31 ) are in the form of the holes extending over the blade parts (20).

10. A blade part (20) according to any one of the preceding claims, characterized in that the number of the blade parts (20) is at least 3, 5, 10, 20, 40, 60, or 70.11 . A blade part (20) according to any one of the preceding claims, characterized in that the blade parts (20) are at least equal in shape and / or material.

12. A blade part (20) according to any one of the preceding claims, characterized in that at least one blade part (20) comprises two halves, and the part of the first channel (30) and / or the part of the second channel (31 ) is formed by connecting the two halves together.

13. A blade part (20) according to any one of the preceding claims, characterized in that the halves are connected by means of a tool-free connection, in particular by means of a clip (60) connection.

14. A wind turbine (10) comprising a blade part (20) according to any one of the preceding claims.

15. A blade part (20) according to any one of the preceding claims, characterized in that the wind turbine (10) is a vertical wind turbine.

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