WO2012136175A2

WO2012136175A2 - Savonius rotor with central support construction

Info

Publication number: WO2012136175A2
Application number: PCT/DE2012/000035
Authority: WO
Inventors: Oliver Wochian
Original assignee: Oliver Wochian
Priority date: 2011-04-05
Filing date: 2012-02-14
Publication date: 2012-10-11
Also published as: WO2012136175A4; WO2012136175A3; DE202011004964U1

Abstract

The invention relates to a Savonius rotor with a vertical rotational axle (3). A cover and a base plate enclose at least two aerofoils that are diplaced radially outwards along a diametrical and simultaneously vertical section and in addition are curved such that each aerofoil forms a concave opening, each opening being closed at the top and at the bottom, and thus each aerofoil is a wind catching surface. The Savonius rotor according to the invention is characterized in that said rotor has a central inner core and an outer core which extend from the base plate to the cover plate in order to ensure the mechanical stability. The central inner core consists of a polygonal support construction with bracings, said construction increasing the efficiency of the Savonius rotor. Furthermore, the proposed Savonius rotor is characterized in that plates with a hyperbolic shape up to flat plates without a curvature are possible as aerofoil shapes. Said plates can be displaced and are therefore able to adapt to the respective wind conditions. Simultaneously, liquids that are transported outwards against the gravitational force by the centrifugal force increase the maximum receivable rotational energy. An oval drive wheel substantially reduces the breakaway torque of the rotor. The gear of the work machine is opposite a braking wheel with respect the rotational axle, said braking wheel protecting the rotational axle against bending moments due to load changes. In a Savonius rotor with only two aerofoils, the stabilizing plates on the cover plate are designed as additional aerofoils. Said additional aerofoils have lateral openings where the air flows out in a tangential manner against the direction of rotation of the rotor and thus supplies an additional torque.

Description

Savonius rotor with central support structure Description

The present invention relates to the aerodynamic and mechanical optimization of several components of a Savoniusrotors by means of a supporting support structure in the region of the axis of rotation and thereby changed wing shapes and flow conditions.

A wind turbine with a Savonius rotor consists of an outer support frame and a rotor rotating about the vertical axis.

The rotor consists essentially of two wings, a bottom plate and a cover plate. Base and cover plate are mounted centrally, so that the rotor can rotate in a holding frame about the vertical axis. The arrangement of the components is derived from a cylinder, which has been divided vertically into two equal cylinder halves.

These cylinder halves are located horizontally in the same plane, but are offset radially outwardly at the cut surfaces. This creates two blades. Thus, air can enter the one blade and exit through the resulting opening in the middle at the other blade again. In their position, the cylinder halves are held by a bottom and a top plate. Vertical connecting bars between the bottom and top plates clamp the wings and give the flights the necessary support. The bottom and top plates themselves are located exactly in the middle and rotate around the vertical axis. The two cylinder halves rotate around this axis.

If not only one Savonius rotor in one plane is used, but two rotors, which are arranged one above the other and rotate about the same axis, one obtains a Savonius rotor, which uses wind from each direction. This also applies to gusts of wind.

This construction also offers a usable torque at low speed and it emits due to design hardly perceptible wind noise.

DE 10 2007 049 590 A1 describes savonius rotors with up to 4 blades.

The object of the present invention is to relieve the wings of the function of mechanical stabilization by a central core and thereby optimize them under purely aerodynamic and manufacturing aspects. This object is achieved by a core in the Savonius rotor according to claim 1, by a modified bottom / cover plate according to claim 2

and by rotor blades according to claim 3

solved.

The other claims contain advantageous developments, which are dependent on the first 3 claims.

For this purpose, the well-known Savonius rotor has been supplemented by a core. The core is a stable support structure between bottom and top plate, which is located exactly in the center of the rotor. It consists of vertical support elements and stabilizing cross connections, which is preferably designed in triangular or X-shaped.

Vertical designs tend to require significantly more bracing as they grow in size. The core makes it possible to install these struts very close to the rotating axis, which means that even massive struts have only a very small influence on the mass moment of inertia and the torque.

The core consists of a single or of two or more superimposed individual cores. Two opposite core outer sides are extended beyond the edge of the core by 10 centimeters, so that the next following support plate has a support surface. Depending on the static load, this extension can also extend to the edge of the bottom and top plate.

In addition, the core ensures that there is always enough space in the center of the machine for the flowing medium, even if the wings are moved radially inwards and overlap.

The core outer sides are designed with square cores that form together with the wing inner sides of a mouth opening with a V-shaped Lufteintrittsöff, preferably at an angle of 45 degrees. This reduces the loss through the wing which faces away from the wind and increases the yield of the wind-facing wing as more air flows through the machine.

Ideally, the area of a wing should be about three times the area of the core through which the medium flows. The wings themselves are fully or partially attached to the left and right sides of the rotor.

The two other sides of the core remain free and serve as an opening to allow the air to flow from the windward wing to the wind away.

As a result, the flow rate of the oscillating medium in the center of the wind turbines in relation to the flow velocity of the medium

low. The medium is guided as laminar as possible through the rotors. In a core that carries two rotors with four blades, a core side plate pair only reaches half the height and decreases by the thickness of the center plate. The other core side plate pair is mounted above and mounted offset by 90 degrees.

An adaptation of this invention Savoniusrotors to the prevailing wind conditions is possible by rotation of the core about the central axis with unchanged wing endpoints. This also changes the wing shape. So you can impress the flowing medium with the help of the wings any overall direction change between 180 and 360 degrees. If the core is mounted with the closed side parallel to the long side of the bottom plate, then it is only 80 degrees, which is well suited for low wind speeds. If the core is mounted with the closed side at 45 degrees to the long edge of the bottom plate, then it is 270 degrees, which is well suited for high wind speeds.

If you mount the core with the open side parallel to the long side of the bottom plate, then you have, after mounting the wings, the well-known Savonius rotor with a total rotation of the flow direction of the medium by 360 degrees, which in this case is state of the art.

In a further development of the Savonius rotor according to the invention not only an inner core is used, but also an outer frame.

This encloses the wing ends of a plane and additionally connected to the cover plate and the bottom or middle plate, so that a connection-resistant, rectangular support structure is formed across the central pivot point. Thus, the bottom and the cover plate and the wings can be made of much thinner material. As a result, significantly larger wings are possible.

In a further development of the inventive Savonius rotor, the core side walls, on which the wings are fastened, are pulled further outward to at most the edge of the supporting plates. This significantly increases the torsional strength of this Savonius rotor.

A further development of the Savonius rotor according to the invention consists in that, during rotation, a fluid forced outwards by the centrifugal force from a tank in the core by means of a pipe or hose connection increases the torque which the machine can absorb at the maximum permissible speed. The vertical components at the wing ends of the outer frame are performed by a closed off of the rotor lid and rotor bottom tube.

Liquids pumped outward by fast turns allow the machine to store significantly more energy and provide even energy delivery. The liquid is conveyed by the centrifugal force in the stabilizer tubes located at the very edge of the wing. The liquid must be frost-proof.

At rated speed, much of the fluid is in the outer tubes. If the wind pressure decreases, the liquid slowly flows back towards the core, thus ensuring a higher rotational speed than a design without a liquid container at the edge of the wing.

A development of the Savonius rotor according to the invention is that the wing shapes deviate from the known forms of the Savonius rotor.

There are two extreme wing shapes, which make sense in this design.

Considering a horizontal and parallel to the bottom plate guided section through the rotor, there are two extremes that limit the possible wing shapes.

The one wing shape is based on a circular wing whose segment describes one third of a full circle and thus stands out clearly from the half shell, which is known today as the prior art.

This circle segment is located on the extension of the core side wall, so that the wing seen from the axis of rotation is only radially outward and then merges into a circular arc.

The other extreme consists only of completely flat plates without any bending.

Between these two extreme forms, parabolic or even hyperbolic shapes are possible. A further development of the Savonius rotor according to the invention is that the outer edges of the wings are equipped with a sawtooth, wave or rectangular profile.

These windbreaking elements reduce the detaching vortex.

Other shapes are also possible. The important thing is that the outer edge is not straight. The same applies to the surface of the wings themselves. Again, a rough surface can be used to reduce air resistance.

A further development of the Savonius rotor according to the invention is that space is created for the core, in which deviates from the round shape of the wings of the Savönius rotor enclosing plates. In the Savonius rotor according to the invention, the shape of the wings ultimately determines the shape of the supporting plates. This implies the use of oval, rectangular or parallelogram-like shapes. As supporting elements here are on the top of the lid and the bottom of the bottom to provide a parallelogram, which extends from one wing tip to the other. To stabilize the support plates themselves, square, rectangular or round shapes are also suitable.

A development of the Savonius rotor according to the invention is that the highest possible efficiency can be achieved if the core the cover plate and the bottom plate are provided with an opening so that the air can flow not only in the direction of the other wing through the machine, but also from the openings just mentioned. This design is particularly suitable for three levels. The lower rotor is additionally vented through an opening in the bottom plate and the upper rotor is additionally vented with an opening in the cover plate.

A development of the Savonius rotor according to the invention is that the drive wheel, which transmits the mechanical energy by means of toothed belt of the connected machine, is not round, but oval. In addition, the blades of the two-bladed machine are forced by means of magnets to come to a stop in exactly the position that the impeller side is always in the direction of generator impeller with the strong curvature of the oval wheel. This has the advantage that when starting the point of application of the force is closer to the pivot point and thus requires a lower breakaway torque. On the same axis, a similar wheel is mounted below the drive wheel, which is offset by 90 degrees and its abutment exactly opposite the wheel z. B. for the generator.

This second wheel is used to decelerate the rotor if the wind speed is too high. In addition, the opposite abutment relieves the generator bearing and thus ensures a more even run. A mechanical or an electric brake reduces the speed by means of centrifugal clutch.

A further development of the Savonius rotor according to the invention with a plane and only two wings is that the vertical stabilization plates additionally serve as baffles to provide maximum torque at the location where the Savonius rotor does not provide torque. Their course roughly corresponds to that of the capital letter "N." Two vertical lines grasp a 60-degree connecting line, and in a plan view where the long side of the oval plate faces north / south, two stabilizing plates are radially toward the edge in north 60 degrees to the southwest / northeast Each of these two inclined plates begins at the point where the cover plate is mounted directly below the core and continue along the rotating axis until shortly before From the radially outer end of the baffles are small flow baffles which run exactly east / west.The length of the stabilizer plates fixed parallel to the long side of the oval bottom plate is about three times as long as the side length of the bottom plate by the double side length of the core bottom plate radially outward in R West or East shifted. Between the plates of one side remains an opening whose extent corresponds approximately to the side length of the core bottom plate.

A development of the Savonius rotor according to the invention is that although the same rotor shape is used on each level, but also different wing shapes can be used when using two levels. The invention is explained in more detail below:

Embodiments for the rotors

List of pictures

Figure 1 Savonius rotor with 4 levels and 8 flat wings, with core

and outer frame, side view

Figure 2 Core with square bottom surface

Figure 3 Base plate with central vertical core

Figure 4 Side view of core with angled plate, horizontal to the bottom plate

Figure 5 Front view of core with square bottom surface

Figure 6 Center plate with square opening to allow the core to fit through

Figure 7 Core with partially attached wing

Figure 8 hyperbolic curved wing

Figure 9 Savonius with 2 levels and 4 wings Top view with tubes along the

Wing edge without cover plate

Figure 10 Savonius rotor with one plane and 3 wings, having a triangular core vented up and down through the supporting plates Figure 1 1 Savonius rotor with 4 planes, 8 wings, square core and flat wings Figure 12 Top view top cover plate of a rotor with a plane and 2 wings with

Additional wing for torque compensation

Figure 13 Core with extension of the side walls and up to the edge of the bottom plate straight wings, top view

Figure 14 Wings following a 120-degree sub-segment of a circle

Figure 15 wings that are straight without any curvature

Figure 16 Square core with extension of the closed side walls

Top view

Figure 17 Square core with extension of the closed side walls

front view

Figure 18 Square core with extension of the closed side walls

sideview

Figure 19 Saw tooth profile at the wing end of the rotor

Figure 20 Rectangular profile at the wing end of the rotor

Figure 21 Wave profile at the wing end of the rotor LIST OF REFERENCE NUMBERS

1 Upper shaft bearing for the rotation axis

2 lower shaft bearing for the rotation axis

3 rotation axis

4 core

5 square bottom surface of the core

6 Base plate with central vertical core

7 angle sheet, horizontal to the bottom plate

8 angle plate, horizontal to the bottom plate side view

9 Horizontal stabilizing plate, which separates the air flow of the upper rotor from the lower one

10 Distance of the angle plate from the bottom plate

1 1 Center plate with square opening to allow the core to fit through

12 square opening for the core

13 Overhang of the lower core outer sides

14 partial attachment of the wing to the core

15 hyperbolic wing

16 End edge of lower rotor blade with sawtooth profi 1

17 lower rotor

18 upper rotor

19 wing end of the wing of the lower rotor with sawtooth profile

0 Top plate of the upper rotor

1 projection of the core outer sides of the upper rotor

2 connecting rods between support plates inside the wing

3 connecting rods between support plates outside the wing

4 vertical stabilizer tube vertically following the wing tip at the upper rotor

5 vertical stabilizing tube vertically following the wing tip at the lower rotor 6 liquid tank on center plate

7 liquid tank on bottom plate

8 Piping from the tank on the center plate to the outer tubes on the wing edge

9 Piping from the tank on the bottom plate to the outer tubes on the wing edge

0 Core bottom plate made of isosceles triangle

1 carrying points where the rotor is connected to the frame.

2 triangular support frame for the rotor made of square tubes, so that the opening in the core remains free. 3 round recess in cover plate Wing with concave profile, which is partially attached to the core

Rotor of a plane as a base element

Core with extension of the sidewalls and with 135 degrees angled planar wings connection between core fragments

bottom rotor

second highest rotor

outer frame, the first and third rotor interconnects

lower horizontal connection element of the outer frame for 1st and 3rd rotor

upper horizontal connecting element of the outer frame for 1st and 3rd rotor

lower horizontal connection element of the outer frame for 2nd and 4th rotor

upper horizontal connecting element of the outer frame for 2nd and 4th rotor

Guiding and reinforcing plates aligned parallel to the core

At an angle of approximately 60 degrees to the core aligned and radially extending air guide plates base plate oval with centrally vertically placed core

Corner points of the rectangular cover plate for the auxiliary wings

flow deflector

Open side of the cuboid core

By side plate closed side of the cuboid core

Line through the two points with the longest distance on the oval circular path

Line through the two points with the shortest distance on the oval circular path

Opening between flow baffle and stabilizer plate

oval gear for energy transfer

toothed belt

round sprocket of the working machine

working machine

round sprocket of the brake device

brake

Rotor with wing formed from a 120 ° bend as a third segment of a circle

Wing formed from a 120 ° bend as a third segment of a circle

following the core side extension

Rotor with wings, which are designed without any curvature

following the core side extension

Wings, which are executed without any curvature following the Kemseitenverlängerung rotor with wings, which follow a hyperbolic curvature

following the core side extension

diagonally across the open core side, where the flowing medium enters 67 diagonally across the open side of the kek, where the flowing medium emerges

68 sawtooth profile at the wing end of the rotor

69 Rectangular profile at the wing end of the rotor

70 Wave profile at the wing end of the rotor

1. Application example is a Savonius rotor with a core, two levels and 4 wings without outer frame.

For this and all other inventive Savonius rotors is that they are stored in at least two places. A bearing is below the rotor (1) and a bearing is located above the rotor (2) on the axis of rotation (3). Each core can be combined with each wing. Therefore, only a few examples are mentioned here.

The central component of this Savonius rotor is the core. This core consists of a cuboid square tube frame (4) with a square base (5) and a height which is identical to the total height of the superposed pairs of wings plus the thickness of the middle support plate (1 1). The core (4) is centrally located on the bottom plate and is aligned symmetrically to the axis of rotation (6). Halfway up the core, a horizontal angle plate is mounted in each of the four corners of the vertical support elements (7). The vertical distance of the four angle plates from the bottom plate is selected such that a small flow-guiding plate (9) mounted on the four angles reaches exactly half the height of the core inside the core (10). The middle support plate (1 1) has the same shape as the bottom plate. It differs only by a square opening in the middle. Its edge length corresponds to the outer edge length of the core (12). The supernatant of the lower core outer sides (13) carries the middle plate (11).

Between bottom plate (6) and middle plate (11) is the lower pair of wings whose wings are diametrically opposite, part of the surface (14) are mounted. The wings of the lower rotor extend the respective projection of the core side walls (13) seamlessly and then follow a hyperbolic curvature (15). The bottom plate includes the lower pair of wings from below and the middle plate from above. The lower bottom plate of the upper rotor is identical to the cover plate of the lower rotor. The vertical wings are guided by a groove, the upper rotor is completely identical. Only its wings, opposite the wings of the lower rotor, diametrically opposite to the other two sides of the core attached (16). The upper wings are held by the middle plate from below and the cover plate from above, which itself lies on the core side extension of the upper rotor (21). This core side extension of the upper rotor formed by two side plates, which are slightly wider than the core side itself and are attached to the sides of the upper rotor. As a result, the middle plate is additionally of clamped at the top and held in place.

Each individual rotor is equipped with vertical connecting rods, which contract the bottom and top plates belonging to a rotor, thus ensuring that the blades remain in the groove. The connecting rods follow the radii of curvature of the wings alternately, once inside the wing (22) and then outside the wing (23). The distance of the connecting rods should not be greater than the outer edge length of the square core.

The connecting rod at the respective outermost end of the upper wings are designed as a tube (24) with a clear diameter of about 20% of the core side length. It is firmly connected to the bottom and top plate of the upper rotor and also firmly connected to the middle plate and the cover plate at the lower rotor (25). The pipe pair (24) belonging to the upper rotor is connected by means of a thin hose (28) to the liquid tank (26) on the middle plate. The pipe pair (25) belonging to the lower rotor is connected to the liquid tank (27) on the middle plate by means of a thin hose (29). Both tanks are located inside the core.

2. Application example is a Savonius rotor with a plane and 3 wings, which have a vented core up and down through the supporting plates.

The basic shape of the core of this invention Savonius rotor is an equilateral / isosceles triangle (30).

Three horizontal support elements are attached to the three corners of the triangular core bottom plate (31). A similar triangle is attached to the opposite side of the support elements. The core thus consists of a triangular column with horizontal Kembodenplatte and horizontally lying core cover plate. The wings are partially attached to each horizontal edge (14) and thus bent in a clockwise direction so that three similar concave windscreen surfaces arise (34). The curvature of the wings seen from the core increases towards the outside more and more. The length of the wings is four times the side length of the core.

Also, this core is centrally stored, but the bearing points are located exactly at the corners of the triangular core. In the cover plate and the bottom plate are a round recess (33), which extends to the inner edge of the core bottom plate or the core cover plate, so that an axially through the entire core passing through opening is formed. The incoming air leaves the rotor thereby additionally by a vertical flow up through the cover plate, or down through the bottom plate. This reduces the flow rate of the medium in the core itself and reduces turbulence within the core. 3. Application example is a Savonius rotor with 4 levels, 8 wings, square core and flat wings.

This design uses a cuboid, divided into four equal fragments fragments core, each with identical, square base (5).

It consists of four basic elements (35), each consisting of a core fragment with a quarter of the total height later, diametrically mounted wing pairs, each with a support latte are firmly connected. In a Savonius rotor of this type, all four base elements are exactly superimposed and each base element is arranged offset to each located by 90 degrees. At the end serves the cover plate with which the uppermost rotor is enclosed. To stabilize the inner core, the side walls of the core are twice as long as the core is wide.

There, flat wings are mounted so that they each forms a 45 degree angle to the extended core side plate. The length of the wings corresponds to the outer circumference of the square base of the core.

Each core fragment is firmly linked to the one above it on all four sides.

The outsides of the lowermost and secondmost rotors are interconnected by an outer frame (40). The lower horizontal connecting element (41) of the outer frame extends below the lowest floor panel and above the uppermost floor panel (42).

Also, the wing outer sides of the second and the fourth rotor are connected by an outer core with each other. Their horizontal connecting element extends below the lowermost cover plate (43) and above the uppermost cover plate (44).

A vertical axis centrally through the entire core, as well as floor and ceiling plate connects all four core fragments together and ensures the rotation of the rotor. Below the bottom and above the cover plate are each an abutment which exerts pressure on the core fragments and thus ensure their cohesion.

In the rotors, whose plates are flat, the wings are designed to be mechanically displaceable, so you can reduce the opening of the wings and so can adapt to changing wind conditions.

The wings can also be moved hydraulically or electrically.

4. Application example is a Savonius rotor with 1 plane, 2 wings, square core and stabilization plates designed as auxiliary wing

The central component of this Savonius rotor is the core, this core consists of a cuboid square tube frame (4) with a square base (5) and a height which is identical to the total height of mounted pairs of wings. The core is exactly in the center of the oval bottom plate (47) and is aligned symmetrically to the rotation axis (3). The open side of the core (50) is parallel to the direction deT longest (52) and the closed side (51) of the core is parallel to the direction of the shortest Connecting line (53) between two lying on the circular path points of the oval bottom plate (47) aligned. At half the height of the core in each case a horizontal angle plate are mounted in all four corners of the vertically standing Traglement (7). The vertical wings are guided by a groove. The rotor is equipped with vertical connecting rods, which contract the bottom and top plate, ensuring that the wings remain in the groove. The connecting rods follow the radii of curvature of the wings alternately once within the wing (23) and then outside the wing (22). The distance of the connecting rods should not be greater than the outer edge length of the square core.

Above the cover plate, two stabilizing plates and two flow guide plates are attached, which have the same height of 50 cm. Between the stabilizing plates (45) and two flow guide plates (46), a gap (54), which is as wide as the square base plate of the core, remains on each side of the rotor. Two plates stabilize the cover plate horizontally and two plates additionally serve as flow control plates. The two stabilization plates (45) are aligned exactly parallel to the open side of the core (50) and the two flow guide plates (46) are at an angle of about 60 degrees (here 57.45 degrees) away from the line (53) counterclockwise inclined and run radially almost to the edge of the cover plate. At the end point in the direction of the outside of these flow guide plates (46) then small flow baffles (49) are mounted, which extend to the edge of the cover plate and deflect the air flowing through the remaining opening through each air in the radial direction to the outside.

The auxiliary wings get their full functionality by a rectangular cover plate whose corners coincide with the end points of the flow baffle plates (48). The cover plate is so large that all four stabilizing plates fit exactly underneath.

Claims

claims:

1. A Savonius rotor for wind turbines with vertical axis of rotation, consisting of at least one base plate, a cover plate and two concave curved, vertical and enclosed by the above plates wings, which are horizontally in the same plane, but at the vertical sectional area are arranged so offset radially outwards through the center that thereby form two blades which serve as windscreen surfaces, which are characterized

that the cover plate and the bottom plate are mechanically connected to each other by a core or individual core fragments, wherein the center of the core bottom is located exactly above the center of the bottom and the cover plate and on its side surfaces the wings flat or partial, opposite with square cores, or be attached to all core edges on triangular cores without the wings being statically loaded by the deck or floor slab.

2. A Savonius rotor for wind turbines according to claim 2, characterized in that the bottom and top plate of the rotor deviate from the circular shape and can be rectangular, parallelogram or oval designed to provide the space required by the core available, the Kembodenplatte itself is also rectangular or triangular executable and forms a column of a total core, or of several individual core fragments by the two closed, opposite side parts of the core.

3. A Savonius rotor for wind turbines according to claim 3, characterized in that wings are mounted with a Biegeraduis of about one-third of a circle to the extension of the closed core side. They can also be bent hyperbolic or parabolic. A rotor is always equipped with a wing shape. Machines with two or more rotors may have different wing shapes.

4. A Savonius rotor for wind turbines according to claim 1, characterized in that the closed side walls of the core are further extended in the direction of bottom and top plate edge, which gives the construction much more stability and the wings thereby still much thinner and thus easier executable are. The side extensions of the core itself may also be bent in this context for static reasons in the outer region.

5. A Savonius rotor for wind turbines according to claim 2, characterized in that the wing tips are equipped with profiles and thus cause less losses due to vortex. A sawtooth profile, a wave-shaped profile or a rectangular profile are Ideally, the size of a single geometric figure is ideally about 10% of the core diameter. Other sizes are also possible.

6. A Savonius rotor for wind turbines according to claim 1, characterized in that the core can be mounted at any angle relative to the edge of the enclosing plates. A central axis through the core and the supporting plates allows the angle to be subsequently changed to cover a wider range of wind speeds.

7. A Savonius rotor for wind turbines according to claim 1, characterized in that the core provides a passage opening which corresponds approximately to one third of the inlet opening of a wing and parallel to the Kerndeck- and core bottom plates lying Strömungsleitbleche provide optimal flow and thereby for a According to the invention desired increased efficiency while simultaneously reducing losses caused by turbulent flows.

8. A Savonius rotor for wind turbines according to claim 1, characterized in that the Savonius rotor according to the invention also has an outer core.

This encloses the wing ends of the lowermost and the uppermost rotor in machines three levels, and the rotor on the first and third levels and additionally the rotors on the second and fourth levels, so that a connection-rigid, cuboid support structures is created, which complete Savonuis Rotor includes.

Θ. A Savonius rotor for wind turbines according to claim 1 and 2, characterized in that during the rotation of a pressed by the centrifugal force from a tank in the core by means of pipe or hose connection outward fluid increases the torque which receives the machine at the maximum allowable speed.

10. A Savonius rotor for wind turbines according to claim 1, characterized in that the drive wheel, which transmits the mechanical energy from the rotating axis by means of a toothed belt to the connected machine, is not round, but oval. This has the advantage that when starting the point of application of the force is closer to the pivot point and thus allows a lower breakaway torque. Exactly opposite the bearing for the working machine is another axle with a gear, to which the braking device is attached. The toothed belt itself thus comprises the oval drive wheel and the gears of the working machine as well as the braking device. This arrangement relieves the bearing, which is so free of any bending moment that causes the tension of the toothed belt. As a brake, a centrifugal clutch, a mechanical, electrical or other suitable Braking device act. Brake and generator can also be driven by two different gears with then two timing belts. The emergency shutdown is achieved according to the invention, because the very thin wings tear in an overload by a predetermined breaking point safely and are easily renewable again.

11. A Savonius rotor for wind turbines according to claim 1, 2 and 3, characterized in that the wings on the core side to which they are attached, can be withdrawn along the core if necessary, so that the size of the wing fits the respective wind conditions. The wings are mechanically, hydraulically or electrically displaceable.

12. A Savonius rotor for wind turbines according to claim 2, characterized in that the arrangement of the four reinforcing plates on the cover plate and / or below the bottom plate form two auxiliary wings.

These auxiliary wings are mounted at an angle, so that the incoming air is accelerated in the direction of the exhaust opening. These side openings are additionally equipped with Strömungsumleitplatten, which generate additional torque exactly in the rotor position, where the Savonius rotor itself can not provide it due to design.