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Title:
A ROTOR OF A WIND MOTOR WITH A VERTICAL AXIS OF ROTATION
Document Type and Number:
WIPO Patent Application WO/2021/052816
Kind Code:
A1
Abstract:
A rotor of a wind motor with a vertical axis of rotation, consisting of the PTO shaft with a disk with arms with the wings installed in them evenly distributed around its circumference and perpendicular to the axis of the shaft, is characterised in that at the ends of the arms (3) of the disc (2) in its horizontal plane of symmetry and close to the outer edge of the arms (3) it has bearing arches (4), in which cords the wings (5) are placed torsionally through the torsional rods (6) fixed on one side in the wing ends (5) in their axis of rotation, while on the other side the rods (6) are ended with tensioning screws (7) placed in the carrying arches (4), moreover the wing (5) contains a tensioning rods (8) tensioning the torsional rod (6), The torsion rod (6) in its one end is fixed in the beam (9), coming from the nose of the wing (5), placed near the end of the wing (5) with the axis lying in the vertical plane of symmetry of the wing (5) The other end of the tension rod (8) is placed in the carrying arches (4) and lies in the plane of the wing (5) or near this plane. Moreover, the wing (5) is connected to the carrying arch (4) by at least one flexible guy (10) lying in a horizontal plane by means of an adjustable length coupling connector (11) which is fixed on one side in the carrying arch (4) and on the wing side (5) by means of a fixing connector (12) fixed to the wing (5) and passing through the vertical axis of wing rotation (5), where the angle between the axis of the fixing connector (12) and the wing chord (5) along the section from the intersection with the axis of the fixing connector (12) and the wing chord (5) in the direction of the wing tile is included in the range of 750÷1050.

Inventors:
ŁAZUR ZBIGNIEW (PL)
Application Number:
PCT/EP2020/075069
Publication Date:
March 25, 2021
Filing Date:
September 08, 2020
Export Citation:
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Assignee:
ENVERTI SP Z O O (PL)
International Classes:
F03D3/00; F03D3/06
Domestic Patent References:
WO2013024515A12013-02-21
WO2012126625A12012-09-27
Foreign References:
US20190041015A12019-02-07
KR20150069066A2015-06-23
FR2442978A11980-06-27
US20090297349A12009-12-03
US4204805A1980-05-27
US3897170A1975-07-29
US3902072A1975-08-26
US4496283A1985-01-29
US6779966B22004-08-24
US7258527B22007-08-21
PL70658B21974-04-30
PL105099B21979-09-29
PL54609B11968-04-18
PL40165B
PL40378B11957-12-20
PL25034B11937-08-12
PL162656B11993-12-31
DE2826180A11979-12-20
Attorney, Agent or Firm:
KALITA, Lucjan (PL)
Download PDF:
Claims:
Claims

1. The rotor of a wind motor with a vertical axis of rotation, consisting of the PTO shaft with a disk with arms with the wings installed in them evenly distributed around its circumference and perpendicular to the axis of the shaft, is characterised in that at the ends of the arms (3) of the disc (2) in its horizontal plane of symmetry and close to the outer edge of the arms (3) it has bearing arches (4), in which cords the wings (5) are placed torsionally through the torsional rods (6) fixed on one side in the wing ends (5) in their axis of rotation, while on the other side the rods (6) are ended with tensioning screws (7) placed in the carrying arches (4), moreover the wing (5) contains a tensioning rods (8) tensioning the torsional rods (6), which is fixed from one end in a beam (9) coming out of the nose of the wing (5) placed near the wing tip (5) with the axis lying in the vertical plane of symmetry of the wing (5) and the other end of the tension rod (8) is placed in the carrying arches (4) either on a torsion rod and lies in the plane of the wing (5) or near this plane, In addition, the wing (5) is connected to the carrying arch (4) by at least one flexible guy (10) lying in a horizontal plane by means of an adjustable length coupling connector (11) which is fixed on one side in the carrying arch (4) and on the wing side (5) by means of a fixing connector (12) fixed to the wing (5) and passing through the vertical axis of wing rotation (5), where the angle between the axis of the fixing connector (12) and the wing chord (5) along the section from the intersection with the axis of the fixing connector (12) with the wing chord (5) in the direction of the wing tile is included in the range of 75°÷105°.

2. Wind motor rotor with vertical rotation axis according to claim. 1, characterized in that the wing (5) has a girder (13) rigidly connected to the wing (5) and placed along the wing in the longitudinal plane of the wing symmetry .

3. Wind motor rotor with vertical rotation axis according to claim. 1, characterized in that it contains at least two carrying arches (4).

4. Wind motor rotor with vertical rotation axis according to claim. 1, characterized in that the first balancing mass (19) is attached to the wing (5) on its outer side in the horizontal plane of symmetry.

5. Wind motor rotor with vertical rotation axis according to claim. 1, characterized in that the second balancing mass (20) is attached to the beam (9) of the wing (5).

6. Wind motor rotor with vertical rotation axis according to claim. 1, characterized in that one side of the torsional rod (6) of the wing is placed permanently in the first sleeve (14) fixed in the girder (13) in the torsion axis of the wing (5).

7. Wind motor rotor with vertical rotation axis according to claim. 1, characterized in that the other side of the torsion bar (6) and ended with the tension screw (7) passes through the second sleeve (15) fixed and protruding on both sides of the carrying arch (4) and is connected to the threaded disc (27), wherein a pressure spring (16) is between the second sleeve (15) and the threaded disc (27).

8. Wind motor rotor with vertical rotation axis according to claim. 1, characterized in that the torsional rod (6) and tensioning rod (8) are constantly under tension.

9. Wind motor rotor with vertical rotation axis according to claim. 1, characterized in that the generating line of the carrying arch (4) is a line symmetrical to the plane perpendicular to the axis of rotation of the rotor passing through the symmetry plane of the disc (2) with the shape of a second degree curve, an oval, or a broken straight line with a shape similar to the letter "V" or "C".

10. Wind motor rotor with vertical rotation axis according to claim. 1 , characterized in that the generating line of the carrying arch (4) is a circle, an ellipse, an oval, a parallelogram or a rectangle, and there are vertical wing torsional rods (6) at the tops of the carrying arch (5).

11. Wind motor rotor with vertical rotation axis according to claim. 1, characterized in that the cross-section of the carrying arch (4) has an airfoil, ellipse shape, oval shape or rectangle with rounded edges.

12. Wind motor rotor with vertical rotation axis according to claim. 1 , characterized in that the cross sections of the carrying arch (4) correspond to the wing profiles (5).

13. Wind motor rotor with vertical rotation axis according to claim. 1 , characterized in that the wing (5) has the shape of an airfoil, which is formed by a sheet of metal, one end of which is fixed in the fold of the other end of the sheet of metal and connected with it, while from the nose side of the wing, the wing (5) has external rebates (17) imposed from the nose side, arranged uniformly along the wing length, the internal shape of which corresponds to the shape of respective airfoil of the wing, wherein the ends of the wings (5) have the internal rebates (18) to which the first sleeves (14) are attached.

14. Wind motor rotor with vertical rotation axis according to claim. 1 , characterized in that the carrying arches (4) are placed directly in the disc (2), while there are settling plates (33) in the ends of carrying arches (4) and there are torsional rods (6) ended with bolts (7) screwed into the threaded discs (27).

15. Wind motor rotor with vertical rotation axis according to claim. 1 , characterized in that the carrying arch (4) in the middle part has a handle (30) in the form of a closed aerodynamic profile which passes from both sides into an openwork structure made up of elastic rods (30) arranged in one plane parallel to each other or converging towards the ends of the carrying arch, which are spaced along the length with appropriate spacing clamps (31), while the ends of the elastic rods (30) are placed in the end clamp (33), and there are torsional rods (6) of wings (5) in the carrying arch (4) chord and in the end clamp (33).

Description:
A rotor of a wind motor with a vertical axis of rotation

The object of the invention is the rotor of a wind motor with a vertical axis of rotation, designed to use wind energy for economic purposes.

Wind motors with vertical axis of the rotor are known, among others, from patent descriptions US 3 897 170, 3902 072,

4496 283, 6 779 966. 7258 527. These motors are characterised by the fact that arms are attached to the vertical axis by means of various hubs and gearboxes, at the ends of which different types and shapes of blades are placed, with the number of arms varying, generally from three to nine. In addition, the blades are equipped with elements allowing them to be partly rotated according to the wind direction to which they are currently exposed. The optimal selection of the number of blades, their shape and the way they are aligned with the wind direction is important for the efficiency of the wind motor.

The solutions used here are that the blades are rotatably fixed in one end and at a certain distance from the axis of rotation there is a dowel or a retaining surface, which creates conditions for the collection of wind energy, and when moving against the wind, the blades take the position towards the wind of the smallest surface area, which results in a difference in moments of force

In addition, a wind turbine with a vertical shaft is known from patent description PL No 70 658, the rotor of which consists of movable blades mounted articulated onto the arms mounted radially around this shaft. A wind turbine with a vertical shaft rotor is known from patent description PL No. 105 099, to which four horizontal axes are mounted perpendicularly in several levels and on which two-part movable blades are mounted.

An air turbine engine equipped with two rotors with vertical axes, mounted on a common support plate, is also known from patent description PL No 54 609, The rotors are partly enclosed by two symmetrical air stream control vanes.

The patent descriptions PL No 40 165 for the wind motor and PL No 40 378 for the vertical shaft wind motor also cover the construction of wind turbines with vertical axis rotors and moving blades.

The patent description PL No 25 034 presents a wind motor consisting of a cylinder mounted on a vertical axis with movable wings, having a curvature such as the curvature of the cylinder surface, mounted on its surface on the axes parallel to the cylinder axis. Each of the wings covers a respective part of said surface. The operation of the motor consists in the fact that, when at rest the wings are arranged radially to the cylindrical axis under the pressure of the springs, with the convex side pressed against the supports. Under wind pressure, the rotation is caused by hitting the concave surface of the wing, held in a radial position, while the convex surfaces of the wing is pressed against the cylinder surface.

There are also known wind motors with vertical rotor axis, among others from the US patent no. 3 897 170. These motors are characterised by the fact that arms are attached to the vertical axis by means of various hubs and gearboxes, at the ends of which different types and shapes of blades are placed, with the number of arms varying, generally from three to nine. In addition, the blades are equipped with elements allowing them to be partly rotated according to the wind direction to which they are currently exposed. What is important for the efficiency of the wind engine is the optimal selection of the number of blades, their shape and the way they are positioned towards the wind direction, i.e. self-steering.

It is also known from the patent description PL 162 656 a wind motor equipped with blades that have the shape of an aircraft wing in cross-section, with the blade being divided into two parts, the upper and lower part, along the longitudinal axis, and with a stabilising and strengthening beam lying in the longitudinal axis between these parts. The upper and lower parts of the blade are connected pivotably in such a way that they are connected in a linear way through the stabilizing and strengthening beam in the front part, forming an oval part of the blade, and they are connected by a lever system in the rear part, wherein the said system opens and closes the blade and is moved by the aileron, which is an extension of the lower part, and after the disappearance of the blade, an extension of the outline of the upper part. Blades made in this way, whose longitudinal axis is parallel to the vertical axis of the motor, are connected in a known way to the vertical axis.

A wind power plant with a vertical axis of rotation described in the German patent no. 2826 180 is known. It has vertical axes set on the perimeter of the centric ring with respect to a vertical axis of rotation, with the sails installed on them. The surface of the sails is divided by these vertical axes into two uneven parts. The vertical axes below the rings have straight yokes installed, in which the slide blocks are fixed on cranks, the other arm of which is connected to the control ring. The control ring is located eccentrically to the axis of rotation of the power plant and has an internal toothed wheel rim. The ring with sails also has an internal toothed wheel rim. Both toothed wheel rims are coupled by a toothed mechanism. Rotation of the ring causes rotation of the control ring, so that the slide blocks cause the rotation of the vertical axes with sails through the yokes. The sails are therefore positioned transversely to the wind direction on the side of the power plant moving in that direction and parallel to the wind direction on the side moving opposite the wind direction.

The essence of the rotor of a wind motor with a vertical axis of rotation, consisting of the PTO shaft with the disk with arms with the wings installed in them evenly distributed around its circumference and perpendicular to the axis of the shaft, is that there are carrying arches at the ends of the arms of the disc in its horizontal plane of symmetry and near the outer edge of the arms, in the chords of which the wings are torsionally fixed through torsional rods fixed on one side in the ends of the wings in their axis of rotation, and on the other side the rods are ended with tensioning screws located in the carrying arches, moreover, the wing contains a tensioning rod that tensions the torsional rod, which is fixed from one end in a beam coming out of the nose of the wing, placed near the end of the wing with the axis lying in the vertical plane of symmetry of the wing and the other end of the tension rod is placed in the carrying arches either on the torsion rod and lies in or near the plane of the wing; in addition, the wing is connected to the carrying arch with at least one flexible guy lying in the horizontal plane by means of an adjustable length coupling rod, set in the carrying arch on one side and on the wing side by means of a fixing rod set in the wing and passing through the vertical axis of rotation of the wing, where the angle between the axis of the fixing rod and the wing chord along the section from the intersection with the axis of the fixing rod with the wing chord in the direction of the wing tail is contained within the limits 75°÷105°.

Preferably, the wing has a girder rigidly connected with the wing and placed along the wing in the longitudinal plane of symmetry of the wing.

Preferably, the motor rotor contains at least two carrying arches.

Preferably, the first balancing mass is attached to the wing on its outer side in the horizontal plane of symmetry.

Preferably, the second balancing mass (20) is attached to the wing beam.

Preferably, one side of the torsional wing rod is placed permanently in the first sleeve fixed in the girder in the wing's torsional axis.

Preferably, the other side of the torsion bar and ended with the tension screw passes through the second sleeve fixed and protruding on both sides of the carrying arch and is connected to the threaded disc, wherein a pressure spring is between the second sleeve and the threaded disc.

Preferably, the torsional rod and tensioning rod are constantly under tension.

Preferably, the generating line of the carrying arch is a line symmetrical to the plane perpendicular to the axis of rotation of the rotor passing through the symmetry plane of the disc with the shape of a second degree curve, an oval, or a broken straight line with a shape similar to the letter "V" or "C".

Preferably, the generating line of the carrying arch is a circle, an ellipse, an oval, a parallelogram or a rectangle, and there are vertical wing torsional rods at the tops of the carrying arch.

Preferably, the cross-section of the carrying arch has an airfoil, ellipse shape, oval shape or rectangle with rounded edges. Preferably, the cross sections of the carrying arch correspond to the wing profiles.

Preferably, the wing has the shape of an airfoil, which is formed by a sheet of metal, one end of which is fixed in the fold of the other end of the sheet of metal and connected with it, while from the nose side of the wing, the wing has external rebates imposed from the nose side, arranged uniformly along the wing length, the internal shape of which corresponds to the shape of respective airfoil of the wing, wherein the ends of the wings have the internal rebates to which the first sleeves are attached. Preferably, the carrying arches are placed directly in the disc, while there are settling plates in the ends of carrying arches and there are torsional rods ended with bolts screwed into the threaded discs in the chords of carrying arches.

Preferably, the carrying arch in the middle part has a handle in the form of a closed aerodynamic profile which passes from both sides into an openwork structure made up of elastic rods arranged in one plane parallel to each other or converging towards the ends of the carrying arch, which are spaced along the length with appropriate distance brackets, while the ends of the elastic rods are placed in the end bracket, and there are torsional rods of wings in the carrying arch chord and in the end bracket .

The advantage of this invention is that the solutions applied make the rotor structure light and resistant to static and dynamic loads. It is also characterized by low sensitivity to the generation of natural vibrations. The use of rods makes it easy to set the geometric parameters of the rotor and openwork structures significantly reduce the weight of the rotor, which makes the solution cheap for construction.

The invention has been presented in more details in the embodiment on the drawing, where figures 1 to 7 represent the rotor of a wind motor with vertical axis of rotation in axonometric views. Generally, the rotor of a wind motor with a vertical axis of rotation consists of a disc (2) mounted on a generator shaft (1). The disc (2) has radially attached arms (3), the ends of which are equipped with carrying arches (4), in which chords the wings (5) are torsionally placed through torsional rods (6). The torsional rods (6) are fixed on one side at the wing ends (5) in their axis of rotation, while on the other side the rods (6) are ended with tension screws (7) placed in the carrying arches (4) in their chords (22). The wing (5) contains a tensioning rod (8), which is fixed from one end in a beam (9) coming out of the nose of the wing (5) placed near the wing's tip (5) with the axis lying in the vertical plane of symmetry of the wing (5). The other end of the tension rod (8) is placed in the carrying arches (4) and lies in the plane of the wing (5). In addition, the wing (5) is connected to the carrying arch (4) by a single flexible guy (10) lying in a horizontal plane through a coupling link (11) of adjustable length, which is embedded on one side in the carrying arch (4). Whereas from the wing side (5), by means of a fixing connector (12) fixed in the wing (5) and passing through the vertical axis of the wing (5) rotation. In addition, the angle between the fixing connector (12) axis and the wing (5) chord along the section from the intersection with the fixing connector (12) axis with the wing (5) chord (23) in the direction of the wing tail is 85°. The wings are ended with the front covers (24). The first balancing mass (19) is attached to the wing (5) on its outer side in the horizontal plane of symmetry, while the second balancing mass (20) is placed on the beam (9) of the wing (5). The carrying arches (4) are connected to each other by stabilising guys (21) in their symmetrical position. Fig.1÷4 represent respectively a carrying arch (4) of the following shape: semi-ellipse, C-shaped, V-shaped, oval-shaped. The fig. 2 shows the reinforcement (26) supporting the frame (4). The fig. 7 shows carrying arches in the form of arms (3), in which torsional rods (6) of the wings (5) are placed together with a stretching string (8). The arms (3) are mounted at the ends of the axis (25) connected to the generator shaft (1). In addition, fig.5 shows a version in which the carrying arches (4) are placed directly in the disc (2) and there are settling plates (33) in their ends. The chords of the carrying arches (4) have torsional rods (6) installed and ended with bolts (7) screwed into the threaded disks (27), and the fig.6 presents the axonometric projection of the rotor of the wind motor, in which the carrying arch (4) in the central part has a handle (29) in the form of a closed aerodynamic profile that passes from both sides into an openwork structure made up of elastic rods (30) arranged in a single plane in parallel to each other, which are spaced out along the length with appropriate spacing clamps (31). In turn, the ends of the elastic rods (30) are placed in the end bracket (32), while there are torsion rods (6) of wings (5) in the carrying arch (4) chord (4) and in the end bracket (32) . Fig. 8 shows detail A from fig.1 , where constructional nuances of the wing (5) fixing are shown. The wing (5) is placed in the chord of the carrying arch (4) through the torsion bar (6), which is permanently fixed in the wing (5) rotation axis in the girder (13) through the sleeve(14). On the other hand, it passes through the sleeve (15) which is fixed in the carrying arch (4), with the sleeve (15) going beyond the contour of the carrying arch (4). The tie-rod (8) goes beyond the sleeve (15) and is terminated with a tension bolt (7) screwed into the threaded disk (27), while there is a pressure spring (16) between the threaded disk (27) and the sleeve (15). In turn fig.9 shows the axonometric view of the rotor in a closer perspective. Fig.10 shows top view with cross section through wing (5) and carrying arch (4), while fig.11 shows top view of the wing profile together with wing fixing and positioning elements (5). Fig.12 shows wing (5) profile made of one sheet of metal sheet, which has a fold (28) on one side, in which the other end of the sheet is placed. The shape of the airfoil is determined by three outer rebates (17) presented in fig.15 and inner rebates (18) presented in fig.14. Details of the wing's sheet metal fold (5) from fig. 12 represents the fig. 13.