Rotor for the use of wind energy and for operation in a wind turbine

Abstract

The invention, which relates to a rotor (1) for harnessing wind energy and for operation in a wind turbine, is based on the objective of providing a rotor (1) that enables the harnessing of wind energy in a manner that is harmless to flying creatures. This objective is achieved by the rotor (1) having a substantially cylindrical base body (3) with fixed protrusions (2) having an asymmetrical cross-section, wherein the rotor (1) has a closed outer surface (5) surrounding the base body (3) with its protrusions (2).

Description

[0001] The invention relates to a rotor for the utilization of wind energy, wherein the rotor is rotatably arranged on a rotational axis.

[0002] The invention also relates to a rotor for operation in a wind turbine, wherein the rotor is mechanically coupled to a generator of the wind turbine for the transmission of a rotary motion from the rotor to the generator.

[0003] The rotor is set into a rotary motion using wind energy or an airflow, which drives the generator of the wind turbine, or sets a rotor of the generator into rotation, whereby the generator driven in this way generates and outputs a voltage.

[0004] In the commercial sector, wind energy is typically harnessed using large, usually three-bladed, wind turbines. These turbines require tall masts to operate in areas of high wind. These tall-mast wind turbines are complex and expensive because they require substantial foundations and bracing for stability.

[0005] High costs, a large space requirement for the mast and foundation, and complex approval procedures mean that the use of such wind turbines in the private sector is virtually impossible.

[0006] Therefore, in the private sector, for example, only small rotors with propellers or so-called slow-running rotors of the Savonius type are used.

[0007] Rotors in the form of so-called rollers or wind rollers are also known. A characteristic feature of such rotors, like wind rollers, is that they rotate around an axis of rotation, which is preferably oriented perpendicular to the airflow striking the rotor. These rotors are usually installed horizontally, but sometimes also vertically.

[0008] This preferably perpendicular arrangement of the rotor to the airflow is considered optimal, which is practically impossible to achieve with a changing airflow direction. In this description, the term "preferably perpendicular arrangement of the rotor to the airflow" encompasses common, naturally occurring deviations between the longitudinal axis of the rotor and the direction of the airflow. Such deviations can be, for example, 70 degrees from the perpendicular angle between the longitudinal axis and the direction of the airflow, whereby the rotor is still set into rotation and a voltage is generated by the driven generator of the wind turbine.

[0009] Various types of such rotors are known from the state of the art.

[0010] KR 10 1046175 B1 describes a generator that produces electricity using external energy sources such as wind power, as well as a wind turbine containing such a generator. A generator rotor is set in rotation by a drum driven or rotated by wind energy, similar to a wind turbine, whereby a current is generated through electromagnetic induction between the rotor and the stator. The described solution aims to improve upon the state of the art and provide a generator that can prevent shocks and vibrations and, consequently, can be easily enlarged. Furthermore, a wind power generation system incorporating this generator is to be provided. The rotating drum is hollow with attached blades supported externally by rings and is set into rotation by the energy of the oncoming wind.

[0011] From GB 2 597 513 A, an air turbine for a vehicle energy recovery unit is known. The air turbine comprises a set of blades arranged circularly around a turbine axis, each blade being connected to an adjacent blade by a sealing surface that blocks the radial airflow between the adjacent blades. The sealing surface can be a continuous area extending around the turbine axis, with each surface having an axial extent corresponding to its blades. The blades can be supported by a drum, the outer surface of which forms the sealing surfaces. The blades can be parallel to the axis, and the turbine can be cylindrical or barrel-shaped.Furthermore, an energy recovery unit for a vehicle is disclosed, comprising at least one turbine with rotor blades for rotation about a turbine axis and an energy conversion device driven by the turbine, which is arranged coaxially to the turbine axis.

[0012] DE 20 2010 011 459 U1 discloses a turbine for wind energy utilization. The turbine for utilizing wind energy on inclined roofs is characterized in that, through an asymmetrical mounting of the turbine body on the roof ridge together with the covering, a particularly effective utilization of wind energy is achieved while simultaneously maintaining a small turbine body size.

[0013] The horizontal turbine housing, combined with the cover and mounting at roof ridge height, allows for the utilization of a relatively large amount of wind despite its small size and therefore low cost. The cover prevents the wind from striking inactive turbine blades and thus creating a braking effect. This results in a higher efficiency than with conventional slow-running rotors.

[0014] German patent DE 20 2017 005 310 U1 discloses a small vertical wind turbine for generating energy by harnessing wind power in low-wind areas. The challenge lies in optimally utilizing incoming wind while simultaneously generating sufficient electricity via a generator, without producing unpleasant rotor noise.

[0015] The solution involves a small wind turbine that adjusts to any prevailing and changing wind direction without the need for a wind vane or other auxiliary device to turn into the wind. The system captures the wind from the prevailing direction, directs it onto the elliptically shaped C-wing via a special sail design, and accelerates the wind on the leading sail and the preceding sail behind it, thus generating sufficient pressure across the elliptically shaped C-wing. The resulting pressure on the sail's spar, and consequently on the shaft, accelerates the generator extremely rapidly via the belt drive.

[0016] Thus, various horizontally and vertically operable turbines or wind turbines are known from the prior art. A particular disadvantage of such systems is that these turbines pose a danger to flying creatures such as insects and birds, which can be caught and at least injured by them.

[0017] Therefore, there is a need for an improved rotor for harnessing wind energy as well as an improved rotor for operation in a wind turbine.

[0018] The object of the invention is to provide a rotor for harnessing wind energy and for operation in a wind turbine, thereby enabling the use of wind energy in a manner that is harmless to flying creatures. Furthermore, the rotor should be easy and inexpensive to manufacture and universally applicable. The rotor should ensure improved efficiency and flexible adaptability to various applications.

[0019] The problem is solved by a rotor with the features according to claim 1 of the independent patent claims. Further developments are specified in the dependent patent claims.

[0020] The rotor according to the invention is designed and intended for the utilization of wind energy and for operation in a wind turbine. The rotor is preferably arranged with its axis of rotation oriented at a right angle to an airflow, the energy of which sets the rotor in motion. The airflow striking the rotor, which acts upon it from a so-called wind direction, causes the rotor to rotate around its axis of rotation.

[0021] According to the invention, the rotor has a substantially cylindrical base body with fixed protrusions having an asymmetrical cross-section, wherein the rotor has a closed outer surface surrounding the base body with its protrusions.

[0022] This means that a surface of the rotor, extending over the series of protrusions or the protrusions and areas of the cylindrical base, has a closed surface without any openings. Therefore, flying creatures cannot get between components or areas of the rotor. These creatures can only reach various areas of the closed surface, from which they can escape independently and unharmed.

[0023] Fixed protrusions are arranged on the essentially cylindrical base of the rotor. These protrusions extend longitudinally along the rotor and parallel to the rotor's axis of rotation. The protrusions are equidistant from the rotor's axis of rotation.

[0024] The protrusions are designed in such a way that, depending on their position on the rotor, they offer varying degrees of flow resistance or air resistance to the airflow striking the rotor. This difference results in a differential force acting on different areas of the rotor's circumference, a phenomenon known from the prior art, and is the cause of the rotor's rotation.

[0025] The essentially cylindrical base body of the rotor with its fixed bulges and its closed outer surface is hereinafter also referred to as the closed rotor body.

[0026] The rotor according to the invention fulfills the condition of a preferably right-angled arrangement of the rotation axis of the rotor to an airflow, particularly in a vertical orientation of the rotor.

[0027] Alternatively, the rotor can also be operated with its axis of rotation horizontally aligned. Even in this case, deviations can occur with respect to an airflow that preferably strikes the rotor at a right angle. To reduce such deviations, a mounting location such as a roof slope can optionally be used, or air deflectors can be employed, as known from DE 20 2010 011 459 U1.

[0028] Furthermore, it is intended that the rotor has a closed base and a closed top surface.

[0029] The essentially cylindrical base body of the rotor also has a closed base surface and a closed top surface.

[0030] The rotor according to the invention, with its closed rotor body, is also designed with a closed base and a closed top surface to further optimize and improve its properties for the protection of flying creatures. This results in a completely enclosed rotor or rotor body without edges or openings that could be dangerous for flying creatures.

[0031] It is further stipulated that the protrusions should have an asymmetrical cross-section and, in particular, a sawtooth shape or a crescent shape with rounded edges.

[0032] The fixed protrusions of the rotor, which extend parallel to the rotor's axis of rotation, have an asymmetrical cross-section. This ensures that the protrusions offer varying degrees of flow resistance or air resistance to the airflow hitting the rotor, depending on their position on the rotor.

[0033] In one embodiment, the fixed protrusions have a sawtooth-shaped cross-section. This cross-section is essentially triangular in shape. Here, the triangle, i.e., the cross-section of the protrusion, is arranged such that a first side of the triangle is oriented towards or abuts the cylindrical base body. A second and a third side of this triangle, which are not oriented towards or abut the cylindrical base body, have different lengths. The shorter, for example, second side, which is arranged at a first angle between 90 degrees and 45 degrees to the surface of the cylindrical base body, creates greater flow resistance for an airflow striking the rotor.The longer, third side, for example, has a second angle, which lies between 10 and 30 degrees and is positioned between the third and first sides. This third side creates less drag for the airflow hitting the rotor, as the airflow can only glide slightly with a slight deflection over its flat surface.

[0034] In an alternative embodiment, the fixed protrusions have a crescent-shaped cross-section. This cross-section essentially has a concave and a convex side of the crescent shape. Here, the crescent-shaped cross-section of the protrusion is arranged on the base body such that the concave side of the protrusion faces the base body or the axis of rotation of the rotor. The convex side of the protrusion faces away from the base body or the axis of rotation of the rotor.

[0035] As a result of this arrangement of the crescent-shaped protrusions, the concave and convex sides of the protrusion create different levels of drag for the airflow striking the rotor. In this case, the drag of the concave side of the crescent-shaped protrusion is greater than the drag of the convex side of the crescent-shaped protrusion.

[0036] It has proven particularly advantageous that at least one bulge, preferably three to thirty bulges, in particular five to nine bulges, are arranged spaced apart from each other on an outer circumference of the rotor.

[0037] Along the outer diameter of the rotor's base body, several protrusions are arranged, forming a unit with the base body and a common outer surface or closed surface. The surface runs smoothly, without edges or openings, for example in an arc over the base body and the protrusions as the rotor's outer surface.

[0038] Depending on the rotor diameter, the geometric shape of the protrusions, and the rotor's installation position during operation, varying numbers of protrusions can be provided on the outer surface of the cylindrical rotor body. For example, rotor designs are possible that have at least one protrusion, preferably three to thirty protrusions, and in particular five to nine protrusions.

[0039] It is also planned that the protrusions will be arranged at equal intervals from each other.

[0040] The protrusions arranged in the outer diameter of the rotor's base body are preferably positioned at equal intervals around the outer diameter. In other words, with such a uniform arrangement of the protrusions, the angle between any two protrusions, viewed from the rotor's axis of rotation, is always the same.

[0041] It is also advantageous that movable wind deflectors are arranged on the protrusions. These movable wind deflectors are permanently and movably attached to the protrusions by appropriate materials or means.

[0042] To improve the rotor's efficiency, movable wind guides are to be installed on the bulges. These movable wind guides are preferably positioned at points on the bulges that are furthest from the rotor's axis of rotation.

[0043] The movable wind deflectors increase the flow resistance or air resistance of the bulge. For this purpose, the movable wind deflectors have two end positions between which they can move.

[0044] In their initial position, the movable wind deflectors are located close to their corresponding protrusion, for example, in a retracted, folded, or inverted state. In this initial position, the movable wind deflectors do not create any additional drag. The mobility of the wind deflectors reduces the air resistance they cause, minimizes turbulence, and increases the rotor's efficiency.

[0045] In a second position, the movable wind deflectors are positioned protruding, unfolded, or removed from their corresponding protrusion, for example, in an extended or unfolded state. In this second position, the movable wind deflectors create additional flow resistance.

[0046] The movable wind deflectors are optionally secured to their corresponding protrusions with retaining straps. These straps are dimensioned to allow the deflectors to move from their first position to their second position, while preventing or intercepting movement beyond this second position. The retaining straps enable limited self-alignment of the deflectors into an optimal second position, maximizing the utilization of the oncoming wind energy.

[0047] The movable wind deflectors have no drive elements. They are moved from their first position to their second position by an airflow striking the rotor. This movement of the movable wind deflectors only occurs when the direction of the current airflow coincides with a predetermined airflow direction. Such a predetermined airflow direction for the movable wind deflectors can be achieved structurally, for example, by an L-shaped or crescent-shaped cross-section. Alternatively, it can also be achieved by positioning the movable wind deflectors at specific points on the rotor's protrusions.

[0048] If the airflow does not affect the movable wind deflectors, they remain in the first position. If the airflow ceases to affect the movable wind deflectors after they have already moved to their second position, they move from the second position back to the first. To ensure this movement from the second position to the first position, the movable wind deflectors incorporate appropriate means. For example, they may have a mechanical preload or return elements such as springs.

[0049] It is also planned that magnets or springs will be arranged on the movable wind guide devices.

[0050] When the movable wind deflectors move from the second position to the first position, contact can occur between them and the protrusions on which they are mounted. Such contact can cause disruptive noises, such as a rattling sound. To prevent this noise, magnets or springs are attached to the movable wind deflectors. For example, by utilizing the repulsive effect of two magnetic fields, contact between the movable wind deflectors and the surface of the protrusions is prevented when the deflectors move from their second to their first position. The springs function similarly, also preventing direct contact and thus noise.

[0051] It is clear to a person skilled in the art that such magnets or springs can also be arranged on the protrusions to prevent noise. Particularly in the version with magnets, one magnet on each movable wind deflector and one magnet on the corresponding protrusions are necessary to create two repulsive magnetic fields.

[0052] Additionally, it is advantageous that the rotor has several individual modules.

[0053] To achieve flexibility regarding the possible applications of the rotor according to the invention, it is provided to assemble a rotor from several individual modules in order to, for example, optimally utilize an airflow on a larger roof area.

[0054] A rotor, also referred to in this description as a closed rotor body, is also a single module. Several of these single modules, or closed rotor bodies, can therefore be arranged along a common axis of rotation to form a complete rotor composed of individual modules. For this purpose, the individual modules are connected to each other, for example, by screws, rivets, or the use of adhesive. The resulting complete rotor is also completely closed with respect to its surface and therefore poses no danger to flying creatures.

[0055] In one embodiment, individual modules with the same diameters are assembled. Specifically, individual modules with the same diameters and with bulges are assembled, with the same number and cross-sections arranged on the respective base bodies.

[0056] In an alternative design variant, individual modules with different diameters are assembled. The resulting rotors, regardless of their size, are also completely closed with respect to their surface, as all individual modules have closed top and bottom surfaces in addition to their closed outer surfaces. Therefore, these variants also pose no danger to flying creatures.

[0057] The rotor material is intended to be metal, plastic, wood, or fiberglass-reinforced plastic.

[0058] The rotor according to the invention, in its embodiment with a substantially cylindrical base body with fixed protrusions and its closed outer surface, is preferably manufactured from materials such as metal, plastic, wood, or glass fiber reinforced plastic. For example, manufacturing the rotor from glass fiber reinforced plastic results in a lightweight, very robust, and weather-resistant design.

[0059] It is also possible to manufacture the movable wind guides from a different material than the closed rotor body. For example, the closed rotor body could be made of a metal such as aluminum, while the movable wind guides are made of plastic. Alternatively, the wind guides can be made of an elastic, flexible, fiber-reinforced material, such as glass fiber reinforced plastic (GFRP).

[0060] Additionally, it is provided that a shaft of the rotor is mechanically coupled to a shaft of a generator of a wind turbine, with the rotor transmitting a rotary motion to the generator for electricity generation.

[0061] As is known from the prior art of wind turbines, the rotary motion of the rotor, set in motion by wind power, is transferred to a shaft of a generator within the wind turbine. This mechanical coupling can be achieved, for example, directly from shaft to shaft, via gears, drive belts, or a gearbox. Coupling via magnets or chains is also known from the prior art.

[0062] The rotary motion transferred to the generator of the wind turbine causes a conventional conversion of mechanical power into electrical power in the generator driven in this way.

[0063] In practice, it is intended that the rotor according to the invention has an outer diameter in the range between 220 mm and 1000 mm.

[0064] Individual modules can have a length along their axis of rotation in a range between 25 mm and 1000 mm, preferably 500 mm.

[0065] The rotor according to the invention is preferably used as a roof ridge system with and without air guide plates, in partition walls or fence systems.

[0066] Furthermore, the rotor according to the invention can be arranged vertically on masts or horizontally on flat roofs or roof edges. In general, the rotor can be operated in any position, even deviating from the horizontal or vertical orientation.

[0067] The features and advantages of this invention explained above can be better understood and evaluated after careful study of the following detailed description of the preferred, non-restrictive exemplary embodiments of the invention with the accompanying drawings, which show: Fig. 1: An embodiment of the rotor according to the invention in a perspective view, Fig. 2: an embodiment of the rotor with movable wind guide devices, Fig. 3: an excerpt of the rotor with a bulge which has an asymmetrical sawtooth cross-section and Fig. 4: an excerpt of the rotor with a bulge which has an asymmetrical crescent-shaped cross-section.

[0068] The Fig. Figure 1 shows an embodiment of the rotor 1 according to the invention in a perspective view.

[0069] In this embodiment, the rotor 1 has nine protrusions 2 arranged on a substantially cylindrical base body 3. In this embodiment, the protrusions 2 are evenly spaced apart from one another on the base body 3. Since the base body 3 need not be a separate body and the rotor 1 can be manufactured from a single material encompassing both the base body 3 and the protrusions 2, the base body 3 is, in the Fig. 1 is represented only by means of a dash-dash line.

[0070] The protrusions 2 are essentially sawtooth-shaped and without edges. The rotor 1 rotates around an axis of rotation 4 in the direction indicated by an arrow. A shaft of the rotor 1 (not shown) is located in the region of this axis of rotation 4. The rotational motion of the rotor 1 is transmitted via this shaft to a shaft of a generator driven by the rotor 1 in a wind turbine. The generator is located in the Fig. 1 not shown.

[0071] The rotor 1 has a closed outer surface 5 that extends over the adjacent protrusions 2. Alternatively, the closed outer surface 5 extends over the protrusions 2 and areas of the cylindrical base body 3 if the protrusions 2 are not directly adjacent. In either case, the outer surface 5 has a closed surface without any openings. Thus, flying organisms cannot enter between components or areas of the rotor 1. These flying organisms can only reach different areas of the surface of the closed outer surface 5, from which they can escape independently and unharmed.

[0072] Furthermore, the rotor 1 has a closed base surface 6 and a closed top surface 7. In the Fig. The closed top surface 7, which is arranged parallel to the closed base surface 6 shown, is not visible because it is located on the opposite side of the rotor 1 shown.

[0073] The rotor 1, with its closed outer surface 5, closed base 6, and closed top surface 7, thus forms a closed body of revolution. This closed body of revolution is also referred to as a single module of the rotor 1. According to the invention, it is possible for several of these single modules with their closed bodies of revolution to be arranged along the common axis of rotation 4, thereby forming a complete rotor or rotor 1 consisting of several single modules. Such an arrangement of several single modules is described in the Fig. 1 not shown.

[0074] The Fig. Figure 2 shows an embodiment of the rotor 1 with movable wind guide devices 8.

[0075] In the Fig. Figure 2 shows the rotor 1 in a view along the axis of rotation 4 and in a side view. The rotor 1 again has nine protrusions 2, which are arranged on a substantially cylindrical base body 3. This is also the case in the embodiment of Fig. 2 the protrusions 2 are asymmetrical in their cross-section and designed in a sawtooth shape.

[0076] At a point on the protrusions 2 furthest from the axis of rotation 4, for example, a movable wind guide 8 is arranged for each protrusion 2. The movable wind guides 8 extend along the length of the rotor 1 and are thus aligned parallel to the axis of rotation 4.

[0077] The movable wind deflectors 8 have a first position in which they are located close to the associated protrusion 2, for example in a retracted or folded state. In this first position, the movable wind deflectors do not create any additional flow resistance.

[0078] The movable wind deflectors 8 also have a second position in which they are arranged projecting from or unfolded from the associated protrusion 2. In this second position, the movable wind deflectors create additional flow resistance.

[0079] The presentation of Fig. Figure 2 shows a wind direction 9. An airflow moves in this wind direction 9 and hits the rotor 1 with its protrusions 2 and its movable wind guides 8. The representation of the Fig. Figure 2 further shows a so-called fixed airflow direction 10 for each movable wind guide 8. Due to the design of the movable wind guide 8, each one exhibits its respective fixed airflow direction 10. When an airflow in the direction of the fixed airflow direction 10 encounters a movable wind guide 8, the force of this airflow moves the guide from the first position to the second position. For clarity, the fixed airflow directions 10 of the nine movable wind guide 8 are indicated by small arrows in the area of ​​the base body 3.

[0080] The movable wind deflectors 8 shown as examples have a mounting point 11 around which they are pivotally mounted. By pivoting around the mounting point 11, the movable wind deflectors 8 change their position between the first and second positions.

[0081] The movable wind guides 8 are shown in their first position, predominantly in the left area of ​​the depicted rotor 1. The airflow striking the rotor 1 from the wind direction 9 results in a force 12, which also acts on the movable wind guides 8 and is partially illustrated by small arrows. The direction of the force 12 corresponds to the direction of the wind direction 9.

[0082] This force 12, when the directions of the force 12 coincide with the defined airflow direction 10, causes a force opening the respective movable wind guide 8, whereby the movable wind guide 8 is moved from the first position to the second position.

[0083] The one from wind direction 9 in the example of the Fig. The airflow striking the rotor 1 at right angles to the axis of rotation 4 causes the movable wind guides 8 shown in the right-hand area of ​​the rotor 1 to unfold or open to a lesser or more complete degree, depending on their current position on the rotor 1. This explains the different positions of the movable wind guides 8 in the right-hand area of ​​the illustration of the rotor 1 in the Fig. 2.

[0084] As the rotation of the rotor 1 continues, the movable wind guides 8 move from the second position back to the first position as the direction of the force 12 decreases in alignment with the direction of the defined airflow 10. If the force 12 of the airflow ceases, for example in calm conditions, the movable wind guides 8 remain in the first position, which represents a basic position or default state of the movable wind guides 8.

[0085] Especially in the left area of ​​the representation of rotor 1 in the Fig. Figure 2 shows the movable wind deflectors 8 arranged in the first position or home position. The movable wind deflectors 8 are designed such that they assume their home position by suitable means, such as a mechanical preload or return elements like springs, when no external force acts on the movable wind deflectors 8.

[0086] In the presentation of the Fig. Optional safety straps 20 are also visible. These safety straps 20 are represented by a dot-dot line. The safety straps 20 are attached at one end to the tips of the movable wind deflectors. A second end of the safety straps 20 is attached to the inside of the protrusions.

[0087] These retaining straps 20 are dimensioned such that the movable wind deflectors 8 can be moved from their first position to the second position, with the retaining straps 20 preventing movement of the movable wind deflectors 8 beyond the second position. The retaining straps 20 thus enable limited self-alignment of the movable wind deflectors 8 in an optimal second position, in which the energy of the oncoming wind is optimally utilized.

[0088] The Fig. Figure 3 shows a partial representation of the rotor 1 with a bulge 2, which has an asymmetrical cross-section and is designed in a sawtooth shape.

[0089] The partially depicted cylindrical base body 3 of the rotor 1 shows an example of a sawtooth-shaped protrusion 2.

[0090] The cross-section of the bulge 2 essentially has the shape of a triangle. Here, the triangle, i.e., the cross-section of the bulge 2, is arranged such that a first side 13 of the (for clarification in the) Fig. The triangle shown in 3 is aligned towards the cylindrical base body 3 or is adjacent to it.

[0091] A second side 14 and a third side 15 of this triangle, which are not aligned with or in contact with the cylindrical base body 3, have different lengths. The shorter second side 14, for example, which is arranged at a first angle 16 between 90 degrees and 45 degrees to the surface of the cylindrical base body 3, creates greater drag for an airflow striking the rotor.

[0092] The longer, for example, third side 15, has a second angle 17, which lies in a range between 10 degrees and 30 degrees and which is located between the third side 15 and the first side 13. The third side 15 presents less drag to an airflow striking the rotor 1, since the airflow can only glide slightly deflected over the flat surface of this side 15.

[0093] The Fig. Figure 4 shows a partial representation of the rotor 1 with a bulge 2, which has an asymmetrical crescent-shaped cross-section.

[0094] This crescent-shaped cross-section of the bulge 2 essentially has a concave side 18 and a convex side 19. The crescent-shaped cross-section of the bulge 2 is arranged on the base body 3 such that the concave side 18 of the bulge 2 faces the base body 3 or the axis of rotation 4 of the rotor 1. The convex side 19 of the bulge 2 faces away from the base body or the axis of rotation 4 of the rotor 1.

[0095] As a result of this arrangement of the crescent-shaped bulge 2, the concave side 18 and the convex side 19 of the bulge 2 create different flow resistances for an airflow striking the rotor 1. In this case, the flow resistance of the concave side 18 of the crescent-shaped bulge is greater than the flow resistance of the convex side 19 of the crescent-shaped bulge. List of reference symbols 1 Rotor 2 bulges 3 cylindrical base bodies 4 Rotation axis 5 closed lateral surface 6 closed floor area 7 closed cover surface 8 movable wind deflectors 9 Wind direction 10. fixed airflow direction 11 Mounting point 12 Force effect 13 first page 14 second page 15 third page 16 first angle 17 second angle 18 concave side 19 convex side 20 tether strap QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] KR 10 1046175 B1

[0010] GB 2 597 513 A

[0011] DE 20 2010 011 459 U1 [0012, 0027] DE 20 2017 005 310 U1

[0014]

Claims

[1] Rotor (1) for the use of wind energy and for operation in a wind turbine, wherein the rotor (1) is rotatably arranged on a rotation axis (4) and wherein the rotor (1) is mechanically coupled to a generator of the wind turbine for the transmission of a rotary motion from the rotor (1) to the generator, characterized by , that the rotor (1) has a substantially cylindrical base body (3) with fixed protrusions (2) having an asymmetrical cross-section, wherein the rotor (1) has a closed shell surface (5) surrounding the base body (3) with its protrusions (2). [2] Rotor (1) according to claim 1, characterized by , that the rotor (1) has a closed base surface (6) and a closed top surface (7). [3] Rotor (1) according to claim 1 or 2, characterized by , that the protrusions (2) have a sawtooth shape or a sickle shape with rounded edges. [4] Rotor (1) according to any one of claims 1 to 3, characterized by , that at least one bulge (2), preferably three to thirty bulges (2), in particular five to nine bulges (2), are arranged spaced apart from each other on an outer circumference of the rotor (1). [5] Rotor (1) according to any one of claims 1 to 4, characterized by that the protrusions (2) are arranged at equal intervals from each other. [6] Rotor (1) according to any one of claims 1 to 5, characterized by , that movable wind deflectors (8) are arranged on the protrusions (2). [7] Rotor (1) according to any one of claims 1 to 6, characterized by , that magnets or springs are arranged on the movable wind guide devices (8). [8] Rotor (1) according to any one of claims 1 to 7, characterized by , that the rotor (1) has several individual modules. [9] Rotor (1) according to any one of claims 1 to 8, characterized by, that the material of the rotor (1) is metal, plastic, wood or glass fiber reinforced plastic. [10] Rotor (1) according to any one of claims 1 to 9, characterized by , that a shaft of the rotor (1) is mechanically coupled to a shaft of the generator of the wind turbine, wherein the rotor (1) transmits a rotary motion to the generator for power generation.

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