JP2013194724A - Rotary blade of magnus type wind power generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotary blade for reducing weight and the size in a rotary part of a generator, by dispensing with a cover of a rotary mechanism for driving the rotary blade of a Magnus type wind power generator.SOLUTION: A rotary blade of a Magnus type wind power generator includes a first support shaft 11 fixed to a rotary support member 61 for taking out electric power by rotating, a plurality of coils 91 fixed to the first support shaft 11, a substantially cylindrical-shaped barrel 21 for opening both ends, a rotor 51 fixed to one opening part of the barrel 21, an end cap 31 for blocking up the other one opening part of the barrel, and a plurality of permanent magnets 81 fixed to the rotor 51. The rotor 51 is rotatably supported by the first support shaft 11 via a plurality of first bearings 71a, 71b and 71c, the plurality of coils 91 and the plurality of permanent magnets 81 are arranged to operate as a brushless DC motor, and the barrel 21 integrally rotates with the rotor 51.

Description

  The present invention relates to a rotor blade of a Magnus type wind power generator.

  In recent years, Magnus type wind power generators as shown in Patent Document 1, Patent Document 2 and Patent Document 3 have been proposed.

  In these wind power generators, the blade that generates lift is not a blade shape like a propeller type, but a cylindrical rotor blade, and when rotating the rotor blade in an air current, the Magnus force generated on the rotor blade By this, the generator is rotated.

  As an advantage of the Magnus type wind power generator, it is possible to control the rotational speed of the wind power generator by controlling the rotational speed of the rotating blade according to the wind speed and changing the magnitude of the Magnus force generated in the rotating blade.

  Specifically, when the wind speed is low, by increasing the rotation speed of the rotor blades, the rotation speed of the wind power generator can be increased and the power generation amount can be increased. In the case of a high wind speed, by reducing the rotation speed of the rotor blade, the rotation speed of the wind power generator can be reduced and destruction due to over-rotation can be prevented.

  In addition, the cylindrical rotor blades are more difficult to break because they are more rigid than the blade blades.

  Furthermore, since it does not have a complicated curved surface, it can be manufactured at low cost.

JP 2007-085327 A JP 2008-175070 A JP 2010-121518 A

  However, in the conventional Magnus type wind power generator, a cover for protecting the drive mechanism that drives the rotor blades is necessary, and the rotating portion of the wind power generator is heavy.

  The Magnus wind power generator rotates the rotor blades by a drive mechanism such as a drive motor, but the drive mechanism is provided separately from the rotor blades and protected by a cover so that it is not affected by wind and rain. . The cover is heavy because a strong waterproof effect is required so that water droplets do not enter, and the weight of the rotating part of the wind power generator on which the drive mechanism is mounted is obstructed.

  Another problem in the Magnus type wind power generator is cooling the drive motor of the rotor blade.

  If the drive motor of the rotor blade is not sufficiently cooled, the heat generated by the coil inside the motor will cause an increase in coil winding resistance and magnet demagnetization, reducing the efficiency of the drive motor. Efficiency will decrease.

  Furthermore, the life of the drive motor is shortened due to grease deterioration of the bearing due to heat and the maintenance cost is increased.

  Therefore, it is necessary to sufficiently cool the drive motor of the rotor blade.

  Another problem is the icing on the rotor blades in cold regions.

  In cold regions, when the rotor blades are icing during snowfall or icy rain, the rotary inertia of the rotor blades is increased or the balance is lost, which may increase the load on the drive motor.

  Further, since the surface state of the rotor blades changes due to icing, there is a concern that the Magnus force generated on the rotor blades is reduced and the power generation efficiency is lowered.

  An object of the present invention is to provide a rotor blade of a Magnus type wind power generator that can reduce the weight and size of the rotating portion of the generator in consideration of the problem that the rotating portion of the wind power generator becomes heavy.

In order to achieve the above object, the first present invention provides:
A first support shaft fixed to a rotation support member that extracts electric power by rotating;
A plurality of coils fixed to the first support shaft;
A substantially cylindrical barrel open at both ends;
A rotor fixed to one opening of the barrel;
An end cap closing the other opening of the barrel;
A plurality of permanent magnets fixed to the rotor,
The rotor is rotatably supported by the first support shaft via a plurality of first bearings,
The plurality of coils and the plurality of permanent magnets are rotor blades of a Magnus type wind power generator that are arranged to operate as a brushless DC motor and in which the barrel rotates integrally with the rotor.

The second aspect of the present invention
The rotor blade of the Magnus type wind power generator according to the first aspect of the present invention, wherein a labyrinth structure is provided on the inner side or the rotation support member side of the rotor.

The third aspect of the present invention
A heat dissipating member that dissipates heat generated by the plurality of coils, connected to the first support shaft;
The heat radiating member is a rotor blade of the Magnus type wind power generator according to the first or second aspect of the present invention, which penetrates the rotation support member and protrudes on the opposite side to the barrel.

The fourth aspect of the present invention is
The end cap is a rotor blade of a Magnus type wind power generator according to the first aspect of the present invention having a second support shaft whose center axis coincides with the first support shaft.

The fifth aspect of the present invention provides
The end cap has a first through hole and a second bearing in the center, and is rotatably supported by the first support shaft through the second bearing,
The first support shaft is a rotor blade of the Magnus type wind power generator according to the first aspect of the present invention, which protrudes from the end cap through the first through hole.

The sixth aspect of the present invention provides
The end cap is a rotor blade of a Magnus type wind power generator according to the first aspect of the present invention, in which at least one second through hole is formed.

The seventh aspect of the present invention
The rotor blade of the Magnus type wind power generator according to the sixth aspect of the present invention, wherein the space is provided with airflow generating means for generating an airflow in a space surrounded by the rotor and the end cap.

In addition, the eighth aspect of the present invention
It is a rotary blade of the Magnus type wind power generator of the 1st present invention provided with the heating means which heats the barrel attached to the 1st support axis.

The ninth aspect of the present invention provides
It is a rotary blade of the Magnus type wind power generator of the 1st present invention in which a rib parallel to the central axis of the barrel is formed in the inner surface of the barrel.

The tenth aspect of the present invention is
The barrel is composed of a plurality of barrel portions that can be divided in a central axis direction or a circumferential direction, and a connecting portion that connects the adjacent barrel portions. Magnus wind power generator according to the first aspect of the present invention. The rotor blades.

The eleventh aspect of the present invention is
It is a rotary blade of the Magnus type wind power generator of the 1st present invention in which a dimple-like dent or projection is formed in the outer surface of the barrel.

The twelfth aspect of the present invention is
The rotor blade of the Magnus type wind power generator according to the first aspect of the present invention, wherein a rib that is parallel, perpendicular or spiral to the central axis of the barrel is formed on the outer surface of the barrel.

The thirteenth aspect of the present invention is
The plurality of coils are divided in the first support axis direction;
The divided coils are the rotor blades of the Magnus type wind power generator according to the first aspect of the present invention, which are displaced with respect to the rotation direction of the rotor.

  ADVANTAGE OF THE INVENTION According to this invention, the rotary blade of a Magnus type wind power generator which can attain weight reduction and size reduction of the rotation part of a generator can be provided.

1 is a perspective configuration diagram of a vertical axis Magnus type wind power generator provided with a rotor blade according to a first embodiment of the present invention. Cross-sectional block diagram seen from the front of the rotary blade in Embodiment 1 concerning this invention Cross-sectional block diagram seen from the front of the rotary blade in Embodiment 2 concerning this invention The perspective view block diagram of the vertical axis | shaft type Magnus type wind power generator provided with the rotary blade in Embodiment 3 concerning this invention. Sectional block diagram seen from the front of the rotary blade in Embodiment 3 concerning this invention The perspective view of the support shaft of the structure which made the coil the staggered arrangement of the rotary blade in Embodiment 3 concerning this invention Cross-sectional block diagram seen from the front of the rotary blade in Embodiment 4 concerning this invention (A)-(c) The perspective block diagram which shows the modification of the end cap in Embodiment 1 and Embodiment 2 concerning this invention, (d) The penetration of the end cap in Embodiment 1-4 concerning this invention Sectional view showing examples of hole arrangement (A)-(e) Perspective structure figure which shows the modification of the barrel of the rotary blade in Embodiment 1-4 concerning this invention, (f) Sectional structure of the rotary blade in Embodiment 1-4 concerning this invention Figure

  Embodiments according to the present invention will be described below with reference to the drawings.

(Embodiment 1)
First, the rotor blade of the Magnus type wind power generator in Embodiment 1 concerning this invention is demonstrated.

  FIG. 1 is a perspective configuration diagram of a vertical axis Magnus type wind power generator provided with a rotor blade 10 according to the first embodiment.

  The vertical axis type Magnus type wind power generator according to the first embodiment includes a pedestal 15 and a support member 61 in which four rotary blades 10 are erected on the upper side of the pedestal 15. A generator is disposed in the pedestal 15, and a generator rotating shaft extending vertically upward is connected to the support member 61. The generator and the generator rotating shaft are not shown in FIG. As the support member 61 rotates, the generator rotating shaft rotates and the generator generates power.

  FIG. 2 is a cross-sectional configuration diagram viewed from the front of the rotary blade 10 of the first embodiment.

  As shown in FIG. 2, the rotor blade 10 of the first embodiment includes a support shaft 11, a barrel 21, an end cap 31, a cover member 41, a rotor 51, a plurality of permanent magnets 81, and a plurality of Coil 91 is provided.

  The support shaft 11 has a substantially cylindrical shape, and one opening is fixed to the support member 61 by bolts or nuts or welding, and a projecting portion 11a extending in the radial direction is provided at the lower portion. A metal such as carbon steel is used as a material for forming the support shaft 11.

  The support shaft 11 corresponds to an example of the first support shaft of the present invention, and the support member 61 corresponds to an example of the rotation support member of the present invention.

  A plurality of coils 91 are attached to the outer surface of the support shaft 11, and both ends of the coils 91 are drawn out of the rotor blade 10 along the support shaft 11 and connected to a generator control unit (not shown). ing.

  The rotor 51 has a rotation shaft 51a at the center and a plurality of through holes 51b on the upper surface, and is rotatably supported by the support shaft 11 via bearings 71a, 71b and 71c. As a material for forming the rotor 51, a metal such as iron or an aluminum alloy is used.

  A back yoke 51c made of a magnetic material is attached to the inner surface of the rotor 51, and a plurality of permanent magnets 81 are attached to the inner surface of the back yoke 51c so as to face the plurality of coils 91. Therefore, the back yoke 51c and the plurality of permanent magnets 81 rotate integrally with the rotation shaft 51a.

  That is, the plurality of permanent magnets 81 and the coil 91 are arranged to operate as a brushless DC motor (or a permanent magnet synchronous motor).

  The bearings 71a and 71b are radial ball bearings and mainly receive a load perpendicular to the axial direction. The bearing 71c is a thrust ball bearing and receives an axial load.

  The bearings 71a, 71b, and 71c are examples of the first bearing of the present invention.

  Further, the support shaft 11 and the central axes of the rotor 51 and the barrel 21 coincide.

  The barrel 21 has a cylindrical shape, and a base end portion on the support member 61 side is fitted to the rotor 51 and is fixed by a screw or an adhesive. As a material for forming the barrel 21, for example, a lightweight and high-strength material such as an aluminum alloy, carbon fiber reinforced plastic, or glass fiber reinforced plastic is used.

  The end cap 31 has a substantially disk shape with the same diameter as the barrel 21, and a plurality of through holes 31 a are formed on the side surface. The end cap 31 is fitted into the open upper end of the barrel 21 and is fixed by screws or bonding. . As a material for forming the end cap 31, a lightweight material such as an aluminum alloy or plastic is used.

  The cover member 41 has a substantially disk shape having the same diameter as that of the barrel 21, and a through hole 41 a is formed at the center. The cover member 41 is fitted into the rotor 51 and fixed by screws or bonding. As a material for forming the cover member 41, a lightweight material such as an aluminum alloy or plastic is used.

  The diameter of the through hole 41 a is larger than the diameter of the support shaft 11 and smaller than the diameter of the protruding portion 11 a, and a labyrinth structure is formed by the protruding portion 11 a and the cover member 41. Is prevented.

  The configuration including the rotor 51, the rotating shaft 51a, the back yoke 51c, and the cover member 41 shown in FIG. 2 is an example of the rotor of the present invention. As shown in FIG. The labyrinth structure is formed.

  As described above, the rotary blade 10 according to the first embodiment has a configuration in which a plurality of permanent magnets 81 and the coils 91 for driving the barrel 21 to rotate are disposed inside the rotary blade 10 that is waterproof protected. This eliminates the need for the cover member of the drive mechanism, and allows the rotating portion of the wind power generator to be reduced in weight and size.

  Next, the operation of the rotary blade 10 of the first embodiment having the above configuration will be described.

  When current flows through the plurality of coils 91 under the control of the generator control unit, a force is generated in the plurality of permanent magnets 81, and the barrel 21 rotates about the support shaft 11 via the rotor 51 to generate a Magnus force. To do.

  By this Magnus force, the generator rotating shaft of the wind power generator disposed in the pedestal 15 is rotated via the support member 61 to generate power.

  At this time, the air heated by the heat generated by the permanent magnet 81 and the coil 91 rises in the barrel 21 through the through hole 51 b and is discharged from the plurality of through holes 31 a formed in the end cap 31. As a result, a chimney effect is generated, and external air flows from the gap between the support shaft 11 and the cover member 41, and the permanent magnet 81 and the coil 91 are cooled.

  Further, the heat generated by the permanent magnet 81 and the coil 91 is also dissipated from the surface of the barrel 21 by heat conduction through the air inside the rotor 51 and the barrel 21, so that the cooling efficiency is increased and the barrel 21. As the surface temperature of the rotor increases, it becomes difficult for the rotor blade 10 to be iced.

  In the first embodiment, a vertical axis type Magnus type wind power generator including four rotary blades 10 has been described as an example, but a vertical axis type Magnus type having a configuration including three or less or five or more rotary blades. It can also be applied to wind power generators.

(Embodiment 2)
Next, the rotor blade of the Magnus type wind power generator in Embodiment 2 concerning this invention is demonstrated.

  FIG. 3 is a cross-sectional configuration diagram viewed from the front of the rotary blade 20 of the second embodiment.

  The rotor blade 20 of the second embodiment can be used, for example, as a rotor blade of a vertical axis Magnus wind power generator having the same configuration as that of the first embodiment as shown in FIG.

  As shown in FIG. 3, the rotor blade 20 of the second embodiment includes a support shaft 12, a barrel 22, an end cap 32, a cover member 42, a rotor 52, a plurality of permanent magnets 82, and a plurality of permanent magnets 82. The coil 92 is provided.

  The support shaft 12 has a cylindrical shape, and one opening is fixed to the support member 62 by bolts and nuts or welding. As a material for forming the support shaft 12, a metal such as carbon steel is used.

  A plurality of coils 92 are attached to the outer surface of the support shaft 12, and both ends of each of the coils 92 are drawn out of the rotor blade 20 along the support shaft 12 and connected to a generator control unit (not shown). ing.

  Further, a heat radiating member 12 a is connected to the support shaft 12, and the heat radiating member 12 a penetrates the support member 62 and protrudes on the opposite side to the barrel 22.

  On the surface of the heat radiating member 12a, heat radiating fins 12b are provided. As a material for forming the heat dissipating member 12a, an aluminum alloy having a high thermal conductivity is used.

  The support member 62 is connected to a generator rotating shaft of a generator disposed in a pedestal 15 of a wind power generator as shown in FIG. 1, for example.

  The support shaft 12 corresponds to an example of the first support shaft of the present invention, and the support member 62 corresponds to an example of the rotation support member of the present invention.

  The rotor 52 has a cylindrical shape, and includes a rotation shaft 52a at the center, a plurality of through holes 52b on the upper surface, and heat radiation fins 52c on the side surfaces. The rotor 52 is supported by the support shaft 12 via the rotor bearings 72a, 72b, 72c. It is rotatably supported. As a material for forming the rotor 52, a metal such as iron or an aluminum alloy is used.

  A back yoke 52d made of a magnetic material is attached to the inner surface of the rotor 52, and a plurality of permanent magnets 82 are attached to the inner surface of the back yoke 52d so as to face the plurality of coils 92. It is the same as in the first embodiment that it is arranged to operate as a magnet synchronous motor.

  Further, a labyrinth structure is formed by the groove 52e provided at the lower end of the rotor 52 and the cover member 42 provided at the support member 62, and rain water intrusion into the rotor blade 20 is prevented.

  3 is an example of the rotor of the present invention, and as shown in FIG. 3, the rotor 52, the rotating shaft 52a and the back yoke 52d are combined on the rotation instruction member side. A labyrinth structure is formed.

  The bearings 72a and 72b are radial ball bearings, and the bearing 72c is a thrust ball bearing.

  The bearings 72a, 72b, and 72c are examples of the first bearing of the present invention.

  The barrel 22 of the second embodiment is configured by connecting two cylindrical barrel portions 22a and 22b by a connecting member 22c.

  The lower end of the barrel 22a and the upper end of 22b are fitted into the connecting member 22c, respectively, and fixed with screws or an adhesive.

  Further, the lower end portion of the barrel 22b is fitted into the rotor 52 and fixed by a screw or an adhesive. As a material for forming the barrels 22a and 22b and the connecting member 22c, for example, a lightweight and high-strength material such as an aluminum alloy, a carbon fiber reinforced plastic, or a glass fiber reinforced plastic is used.

  The support shaft 12 and the central axes of the rotor 52 and the barrel 22 are the same as in the first embodiment.

  The two barrel portions 22a and 22b may be further divided in the circumferential direction.

  For example, a cylindrical barrel portion may be formed by joining arc-shaped members made by bending an aluminum alloy rolled material through a connecting member by rivets, welding, or the like.

  Further, in the manufacturing process of the rolled material, dimple-like depressions or protrusions can be formed on the barrel surface.

  In this way, by configuring the barrel so that it can be divided into a plurality of barrel portions, the manufacturing cost and the transportation cost when the barrel is enlarged can be reduced.

  The end cap 32 has a substantially disk shape with the same diameter as the barrel 22, and a plurality of through holes 32 a are formed on the side surface. The end cap 32 is fitted into the upper end of the barrel 22 a and is fixed by screws or bonding. As a material for forming the end cap 32, a lightweight material such as an aluminum alloy or plastic is used.

  The through hole 32a corresponds to an example of the second through hole of the present invention.

  As described above, the rotary blade 20 according to the second embodiment has a configuration in which the plurality of coils 92 and the permanent magnet 82 for rotating the barrel 22 are disposed inside the rotary blade 20 that is waterproof protected. This eliminates the need for the cover member of the drive mechanism, and allows the rotating portion of the wind power generator to be reduced in weight and size.

  Next, the operation of the rotor blade 20 of the second embodiment having the above configuration will be described.

  When a current flows through the plurality of coils 92 under the control of the generator control unit, the barrel 22 rotates about the support shaft 12 via the rotor 52 and generates a Magnus force.

  By this Magnus force, the generator rotating shaft of the wind power generator disposed in the pedestal 15 is rotated via the support member 62 to generate power.

  At this time, the air heated by the heat generated by the permanent magnet 82 and the coil 92 rises in the barrel 22 through the through hole 52 b and is discharged from the plurality of through holes 32 a formed in the end cap 32. As a result, a chimney effect is generated, and external air flows from the gap between the rotor 52 and the cover member 42, and the permanent magnet 82 and the coil 92 are cooled.

  The heat generated by the permanent magnet 82 and the coil 92 is also dissipated from the surface of the barrel 22 due to heat conduction through the air inside the rotor 52 and the barrel 22, so that the cooling efficiency is increased and the barrel 22 is also improved. As the surface temperature of the rotor increases, it becomes difficult for the rotor blade 20 to be iced.

  Further, in the second embodiment, the heat generated by the permanent magnet 82 and the coil 92 is generated by providing the heat dissipating fins 52c on the side surface of the rotor 52 and the heat dissipating member 12a connected to the support shaft 12. , Can dissipate heat more efficiently.

  The heat dissipating member 12a is preferably in contact with a stator core (not shown) of the coil 92.

  For example, a plurality of through holes are provided in the stator core, a plurality of protrusions corresponding to the plurality of through holes are provided in the heat radiating member 12a, and the heat radiating member 12a can be brought into contact with the stator core by fitting them. .

  Further, the heat dissipation member 12 a may be a part of the support shaft 12 that penetrates the support member 62 and protrudes to the opposite side of the barrel 22.

  In the first and second embodiments, an example in which the rotary blades 10 and 20 are applied to a vertical axis type Magnus wind power generator has been described. However, the rotary blades 10 and 20 of the first and second embodiments are horizontal axis types. It can also be applied as a rotor blade of a Magnus type wind power generator.

(Embodiment 3)
Next, the rotor blade of the Magnus type wind power generator in Embodiment 3 concerning this invention is demonstrated.

  FIG. 4 is a perspective configuration diagram of a vertical axis Magnus type wind power generator provided with the rotor blade 30 of the third embodiment.

  The vertical axis type Magnus wind power generator according to the third embodiment supports the upper side of the rotary blade 30 in addition to the base 16 and the support member 63 in which the four rotary blades 30 are erected on the upper side of the base 16. A disk-shaped support member 64 is provided. A generator is disposed in the pedestal 16, and a generator rotating shaft 17 extending vertically upward is connected to support members 63 and 64. As the support members 63 and 64 rotate, the generator rotating shaft 17 rotates, and the generator generates power.

  FIG. 5 is a cross-sectional configuration diagram viewed from the front of the rotary blade 30 of the third embodiment.

  As shown in FIG. 5, the rotor blade 30 of the third embodiment includes a support shaft 13, a barrel 23, an end cap 33, a cover member 43, a rotor 53, a plurality of permanent magnets 83, and a plurality of The coil 93 is provided.

  The support shaft 13 has a cylindrical shape, and one opening is fixed to the support member 63 by bolts and nuts or welding. As a material for forming the support shaft 13, a metal such as carbon steel is used.

  A plurality of coils 93a, 93b are attached to the outer surface of the support shaft 13, and both ends of the coils 93a, 93b are drawn out of the rotor blade 30 along the support shaft 13, and are not shown in the generator control. Connected to the department.

  The support members 63 and 64 are connected to the generator rotating shaft 17 of the generator disposed in the base 16 of the wind power generator as shown in FIG. 4, for example.

  The support shaft 13 corresponds to an example of the first support shaft of the present invention, and the support members 63 and 64 correspond to an example of the rotation support member of the present invention.

  The rotor 53 has a cylindrical shape, and has a rotation shaft 53a at the center, a plurality of through holes 53b on the upper surface, and heat radiation fins 53c on the side surfaces. The rotor 53 is supported by the support shaft 13 via the rotor bearings 73a, 73b, 73c. It is rotatably supported. As a material for forming the rotor 53, a metal such as iron or an aluminum alloy is used.

  A back yoke 53d made of a magnetic material is attached to the inner surface of the rotor 53, and a plurality of permanent magnets 83a and 83b are attached to the inner surface of the back yoke 53d so as to face the plurality of coils 93a and 93b, respectively. It is arranged to operate as a DC motor (or permanent magnet synchronous motor).

  Thus, by arranging the permanent magnet 83a and the coil 93a and the permanent magnet 83b and the coil 93b side by side in the axial direction of the rotor blade 30, the rotor 53 is not enlarged in the diameter direction of the rotor blade 30. The rotational torque of 30 can be increased.

  Further, the cogging torque can be reduced by shifting the phases of the permanent magnet 83a and the coil 93a, and the permanent magnet 83b and the coil 93b.

  Furthermore, the coil 93 a and the coil 93 b arranged separately in the axial direction of the support shaft 13 may be disposed so as not to overlap in the axial direction of the support shaft 13.

  FIG. 6 shows a perspective view of the support shaft of the rotor blade in the third embodiment in which the coil 93a and the coil 93b are arranged so as not to overlap with the support shaft 13 in the axial direction. In FIG. 6, the same reference numerals are used for components corresponding to those in FIG.

  The support shaft 13 having the configuration shown in FIG. 6 is divided in the axial direction, and a coil is wound around a tooth 96 provided at a position shifted in the rotational direction, so that the coils 93a and 93b are arranged in a staggered manner. An arrow indicated by a two-dot chain line in FIG. 6 indicates the direction of the airflow 97 around the support shaft 13.

  With the configuration as shown in FIG. 6, the distance between the coils can be increased in the circumferential direction of the support shaft 13, so that the ventilation area is increased and the coils 93 a and 93 b can be efficiently cooled. .

  Note that the coils 93a and 93b shown in FIG. 6 that are arranged in a staggered manner when viewed from the axial direction correspond to an example of coils that are arranged to be shifted with respect to the rotation direction of the rotor of the present invention.

  Further, as shown in FIG. 5, a labyrinth structure is formed by the groove 53 e provided at the lower end of the rotor 53 and the cover member 43 provided at the support member 63, and rainwater enters the inside of the rotor blade 30. Is prevented.

  In the third embodiment, an axial fan 53f is provided below the rotor 53.

  The axial fan 53 f rotates integrally with the rotor 53, generates an air flow toward the end cap 33 inside the rotary blade 30, and allows external air to flow into the rotary blade 30.

  The axial fan 53f is an example of the airflow generating means of the present invention.

  The bearings 73a and 73b are radial ball bearings, and the bearing 73c is a thrust ball bearing.

  The bearings 73a, 73b, and 73c are examples of the first bearing of the present invention.

  The barrel 23 has a cylindrical shape, and a base end portion on the support member 63 side is fitted to the rotor 53 and is fixed by a screw or an adhesive. As a material for forming the barrel 23, for example, a lightweight and high-strength material such as an aluminum alloy, carbon fiber reinforced plastic, or glass fiber reinforced plastic is used.

  The end cap 33 has a substantially disk shape with the same diameter as the barrel 23, and a plurality of through holes 33 a are formed on the side surface, a support shaft 33 b is formed on the upper surface so as to protrude from the upper surface, and is fitted to the open upper end of the barrel 23. It is fixed with screws or adhesives. As a material for forming the end cap 33, a metal such as carbon steel or an aluminum alloy is used.

  The support shaft 33b may be formed integrally with the end cap 33, may be formed separately from the end cap 33, and may be assembled to the end cap 33.

  The through hole 33a corresponds to an example of the second through hole of the present invention, and the support shaft 33b corresponds to an example of the second support shaft of the present invention.

  Further, the support shaft 13 and the central axes of the rotor 53, the barrel 23, and the support shaft 33b coincide with each other.

  A radial ball bearing 73d is fixed to the support member 64 disposed above the rotary blade 30 and rotatably supports the second support shaft 33b.

  By comprising in this way, since the rotary blade 30 can be supported by both ends, the intensity | strength with respect to the strong wind of the rotary blade 30 improves.

  As described above, the rotary blade 30 according to the third embodiment has a configuration in which a plurality of coils 93 and the permanent magnet 83 for driving the barrel 23 to rotate are disposed inside the rotary vane 30 that is waterproof protected. This eliminates the need for the cover member of the drive mechanism, and allows the rotating portion of the wind power generator to be reduced in weight and size.

  Next, the operation of the rotary blade 30 of the third embodiment configured as described above will be described.

  When a current flows through the plurality of coils 93 under the control of the generator control unit, the barrel 23 rotates about the support shaft 13 via the rotor 53 to generate a Magnus force.

  By this Magnus force, the generator rotating shaft of the wind power generator disposed in the pedestal 16 is rotated via the support members 63 and 64 to generate power.

  At this time, the air heated by the heat generated by the permanent magnet 83 and the coil 93 rises in the barrel 23 through the through hole 53 b by the action of the axial fan 53 f accompanying the rotation of the rotor 53, and reaches the end cap 33. At the same time as being forcibly discharged from the plurality of through holes 33 a formed, external air flows from the plurality of through holes 63 a provided in the support member 63, and the permanent magnet 83 and the coil 93 are cooled.

  The heat generated by the permanent magnet 83 and the coil 93 is also dissipated from the surface of the barrel 23 due to heat conduction through the air inside the rotor 53 and the barrel 23, so that the cooling efficiency is increased and the barrel 23 is increased. As the surface temperature rises, it becomes difficult for the rotor blade 30 to be iced.

  Furthermore, by providing the radiation fins 53c on the side surface of the rotor 53, the heat generated by the permanent magnet 83 and the coil 93 can be radiated more efficiently.

(Embodiment 4)
Next, the rotor blade of the Magnus type wind power generator in Embodiment 4 concerning this invention is demonstrated.

  FIG. 7 is a cross-sectional configuration diagram viewed from the front of the rotor blade 40 of the fourth embodiment.

  The rotor blade 40 of the fourth embodiment can be used, for example, as a rotor blade of a vertical axis Magnus wind power generator having the same configuration as that of the third embodiment as shown in FIG.

  As shown in FIG. 7, the rotor blade 40 of the fourth embodiment includes a support shaft 14, a barrel 24, an end cap 34, a rotor 54, a plurality of permanent magnets 84, a plurality of coils 94, A heater 95 is provided.

  The support shaft 14 has a cylindrical shape, and one end is fixed to the lower support member 65 and the other end is fixed to the upper support member 66 by bolts and nuts, respectively. As a material for forming the support shaft 14, a metal such as carbon steel is used.

  A plurality of coils 94 are attached to the outer surface of the support shaft 14, and both ends of each of the coils 94 are drawn out of the rotor blades 40 through the support shaft 14 and connected to a generator control unit (not shown). ing.

  The support members 65 and 66 are connected to the generator rotating shaft 17 of the generator disposed in the base 16 of the wind power generator as shown in FIG. 4, for example.

  The support shaft 14 corresponds to an example of the first support shaft of the present invention, and the support members 65 and 66 correspond to an example of the rotation support member of the present invention.

  The rotor 54 has a substantially cylindrical shape. An axial fan 54c is formed on the lower surface and a heat radiation fin 54b is formed on the side surface. The rotor 54 is rotatably supported by the support shaft 14 via bearings 74a and 74b. As a material for forming the rotor 54, a metal such as iron or an aluminum alloy is used.

  A back yoke 54a made of a magnetic material is attached to the inner surface of the rotor 54, and a plurality of permanent magnets 84 are attached to the inner surface of the back yoke 54a so as to face the plurality of coils 94, respectively. It is arranged to operate as a permanent magnet synchronous motor).

  The axial fan 54 c rotates integrally with the rotor 54, generates an air flow toward the end cap 34 inside the rotor blade 40, and allows external air to flow into the rotor blade 40.

  The axial fan 54c is an example of the airflow generating means of the present invention.

  The bearing 74a is a radial ball bearing, and the bearing 74b is a thrust ball bearing.

  The bearings 74a and 74b are an example of the first bearing of the present invention.

  The barrel 24 has a cylindrical shape, and a base end portion on the support member 65 side is fitted to the rotor 54 and is fixed by a screw or an adhesive. As a material for forming the barrel 24, for example, a lightweight and high-strength material such as an aluminum alloy, carbon fiber reinforced plastic, glass fiber reinforced plastic, or the like is used.

  The end cap 34 has a plurality of through holes 34a on the side surface and a through hole 34b in the center. A radial ball bearing 74c is fixed inside the end cap 34. The end cap 34 is fitted into the open upper end of the barrel 24 and is screwed or bonded. It is fixed with. As a material for forming the end cap 34, a metal such as carbon steel or aluminum alloy is used.

  The through hole 34b is an example of the first through hole of the present invention, the through hole 34a is an example of the second through hole of the present invention, and the radial ball bearing 74c is the second bearing of the present invention. An example.

  The support shaft 14, the rotor 54, the barrel 24, and the central axes of the through holes 34b are coincident with each other.

  In addition, a heater 95 is fixed to the support shaft 14 in the fourth embodiment. The heater 95 is drawn out of the rotor blade 40 through the support shaft 14 and connected to a generator control unit (not shown).

  The heater 95 is an example of the heating means of the present invention.

  With this configuration, the rotor blade 40 can be supported at both ends as in the third embodiment, so that the strength of the rotor blade 40 against strong winds is improved.

  Next, the operation of the rotor blade 40 of the fourth embodiment having the above configuration will be described.

  When current flows through the plurality of coils 94 under the control of the generator control unit, the barrel 24 rotates about the support shaft 14 via the rotor 54 to generate a Magnus force.

  By this Magnus force, the generator rotating shaft of the wind power generator disposed in the pedestal 16 is rotated via the support members 65 and 66 to generate power.

  At this time, the air heated by the heat generated by the permanent magnets 84 and the coils 94 rises in the barrel 24 by the action of the axial fan 54 c accompanying the rotation of the rotor 54, and a plurality of air formed on the end cap 34. At the same time, the air is forcibly discharged from the through holes 34a, and external air flows from the plurality of through holes 65a provided in the support member 65, whereby the permanent magnet 84 and the coil 94 are cooled.

  Further, the heat generated by the permanent magnet 84 and the coil 94 is also dissipated from the surface of the barrel 24 by heat conduction through the air inside the rotor 54 and the barrel 24, so that the cooling efficiency is increased and the barrel 24 is increased. As the surface temperature of the rotor increases, it becomes difficult for the rotor blade 40 to be iced.

  Furthermore, by providing the radiation fins 54b on the side surfaces of the rotor 54, the heat generated by the permanent magnet 84 and the coil 94 can be radiated more efficiently.

  Furthermore, in the rotor blade 40 of the fourth embodiment, for example, when restarting from a stopped state for a long time in a cold region, the heater 95 is operated by the control of the generator control unit, and the barrel 24 that has been icing is removed. By removing the ice and snow adhering to the surface by heating from the inside, it is possible to reduce the load on the rotor blade 40 and to prevent the power generation efficiency from decreasing.

  In the third and fourth embodiments, the example in which the axial fans 53f and 54c are applied as the airflow generating means has been described. However, instead of the axial fans 53f and 54c, the end caps 33 and 34 are provided inside the barrel. A centrifugal fan that discharges the air may be formed.

  Further, for the bearings 71a, 71b, 72a, 72b, 73a, 73b, 73d, 74a, 74c of the first to fourth embodiments, radial roller bearings or the like can be used instead of radial ball bearings.

  Furthermore, as the bearings 71c, 72c, 73c, and 74b, thrust roller bearings, thrust magnetic bearings, or the like can be used instead of thrust ball bearings.

  Furthermore, when the radial bearings 71a, 71b, 72a, 72b, 73a, 73b, 73d, 74a, and 74c can support the axial load of the rotor blades, the thrust bearings 71c, 72c, 73c, and 74b may be omitted. Good.

  FIGS. 8A to 8C are perspective configuration diagrams showing modifications of the end caps 31 and 32 in the first and second embodiments.

  The upper surfaces of the end caps 31 and 32 of the first and second embodiments may be formed in a curved shape that is convex upward as shown in FIG. Moreover, as shown in FIG.8 (b), you may form in a substantially cone shape.

  By forming the upper surfaces of the end caps 31 and 32 as described above, it is difficult to cause icing on the upper surfaces of the end caps 31 and 32.

  Further, the side surfaces of the end caps 31 and 32 may be inclined so that the upper diameter is larger than the diameter of the barrel as shown in FIG.

  By forming the side surfaces of the end caps 31 and 32 in this manner, it is possible to make it difficult for water droplets and raindrops to enter the barrels 21 and 22.

  FIG. 8D is a horizontal sectional view showing an arrangement example of the through holes 31a, 32a, 33a, 34a of the end caps 31, 32, 33, 34 in the first to fourth embodiments.

  In each of the first to fourth embodiments, the through holes 31a, 32a, 33a, 34a of the end caps 31, 32, 33, 34 are arranged at the center of the end caps 31, 32, 33, 34 as shown in FIG. It is preferable that it is formed at an angle with respect to the radiation direction from. In addition, R in FIG.8 (d) has shown the rotation direction of the barrel 21,22,23,24.

  By forming in this way, it is possible to prevent external air from flowing backward from the through hole of the end cap due to the rotation of the barrel.

  FIGS. 9A to 9E are perspective configuration diagrams illustrating modifications of the barrels 21, 22, 23, and 24 of the rotor blades 10, 20, 30, and 40 according to the first to fourth embodiments. FIG. 9F is a cross-sectional configuration diagram of an example of the rotor blades 10, 20, 30, and 40 in the first to fourth embodiments.

  A dimple-like recess 200 may be formed on the surface of the barrels 21, 22, 23, and 24 of the first to fourth embodiments as shown in FIG. Moreover, you may form the protrusion 201 as shown in FIG.9 (b). Moreover, as shown in FIG.9 (c), the rib 202 parallel to a central axis may be formed. Further, as shown in FIG. 9D, a rib 203 perpendicular to the central axis may be formed. Moreover, as shown in FIG.9 (e), the helical rib 204 may be formed.

  Each rib formed in FIG. 9C to FIG. 9E may be formed by any method. For example, a member corresponding to a rib may be added to the surface of the barrel processed into a cylindrical shape, or a rib may be formed by cutting the surface of the barrel processed into a cylindrical shape.

  Further, instead of forming ribs on the surface of the barrel, grooves may be formed on the surface of the barrel.

  By forming the surfaces of the barrels 21, 22, 23, and 24 as described above, the flow of the airflow is improved, and a large Magnus force effect can be obtained by a little rotation, and the barrels 21, 22, 23, and 24 are obtained. The effect of reducing the rotational noise is also obtained.

  Furthermore, as shown in FIG. 9F, ribs 205 parallel to the central axis may be formed on the inner surfaces of the barrels 21, 22, 23, and 24 of the first to fourth embodiments.

  The rib 205 formed on the inner surface of the barrel may be formed by any method. For example, it may be formed by extrusion or may be formed by drawing.

  By forming the inner surfaces of the barrels 21, 22, 23, and 24 in this way, the surface area of the inner surface of the barrel can be increased, and heat inside the barrel can be more effectively transmitted to the barrel.

  As described above, according to the present invention, since the drive mechanism of the rotor blades such as the coil and the permanent magnet is arranged inside the barrel of the rotor blade, the cover member of the rotor blade drive mechanism becomes unnecessary, The rotating part of the generator can be reduced in weight and size.

  Further, according to the present invention, the heat generated by the coil and the permanent magnet is radiated from the surface of the rotor blade, so that the coil and the permanent magnet can be efficiently cooled and the life can be extended. Machine maintenance costs can be reduced.

  Further, the heat generated by the coil and the permanent magnet or the heater is conducted to the surface of the rotor blade, thereby increasing the surface temperature of the rotor blade and preventing icing and freezing.

  The rotor blade according to the present invention has the effect of reducing the weight and size of the rotating part of the generator, the effect of preventing the decrease in power generation efficiency due to the heat generated by the drive mechanism, and the effect of reducing the maintenance cost by extending the life of the drive mechanism. It is effective as a rotor blade of a Magnus type wind power generator because it exhibits the effect of preventing a decrease in power generation efficiency in cold regions by preventing icing.

10, 20, 30, 40 Rotor blades 11, 12, 13, 14 Support shaft 11a Protruding portion 12a Heat radiating member 12b Heat radiating fins 15, 16 Base 17 Generator rotating shaft 21, 22, 23, 24 Barrel 22a, 22b Barrel portion 22c Connecting member 31, 32, 33, 34 End cap 31a, 32a, 33a, 34a Second through hole 33b Second support shaft 34b First through hole 41, 42, 43 Cover member 41a Through hole 51, 52, 53 , 54 Rotor 51a, 52a, 53a Rotor rotating shaft 51b, 52b, 53b Through hole 52c, 53c, 54b Radiation fin 51c, 52d, 53d, 54a Back yoke 52e, 53e Groove 53f, 54c Axial fan 61, 62, 63, 64, 65, 66 Support member 63a, 65a Through hole 71a, 71b, 72 , 72b, 73a, 73b, 73d, 74a, 74c Radial ball bearings 71c, 72c, 73c, 74b Thrust ball bearings 81, 82, 83, 84 Permanent magnets 91, 92, 93, 94 Coil 95 Heater 96 Teeth 97 Airflow 200 Recess 201 Projection 202, 203, 204, 205 Rib

Claims (13)

A first support shaft fixed to a rotation support member that extracts electric power by rotating;
A plurality of coils fixed to the first support shaft;
A substantially cylindrical barrel open at both ends;
A rotor fixed to one opening of the barrel;
An end cap closing the other opening of the barrel;
A plurality of permanent magnets fixed to the rotor,
The rotor is rotatably supported by the first support shaft via a plurality of first bearings,
The plurality of coils and the plurality of permanent magnets are arranged so as to operate as a brushless DC motor, and the rotating blades of the Magnus wind power generator are configured such that the barrel rotates integrally with the rotor.   The rotor blade of the Magnus type wind power generator according to claim 1, wherein a labyrinth structure is provided on the inner side or the rotation support member side of the rotor. A heat dissipating member that dissipates heat generated by the plurality of coils, connected to the first support shaft;
The rotor blade of a Magnus type wind power generator according to claim 1 or 2, wherein the heat radiating member penetrates the rotation support member and protrudes to the opposite side of the barrel.   The rotor blade of the Magnus type wind power generator according to claim 1, wherein the end cap has a second support shaft whose center axis coincides with the first support shaft. The end cap has a first through hole and a second bearing in the center, and is rotatably supported by the first support shaft through the second bearing,
The rotor blade of the Magnus type wind power generator according to claim 1, wherein the first support shaft protrudes from the end cap through the first through hole.   The rotor blade of the Magnus type wind power generator according to claim 1, wherein at least one second through hole is formed in the end cap.   The rotor blade of the Magnus type wind power generator according to claim 6, further comprising an airflow generating means for generating an airflow in a space surrounded by the rotor and the end cap.   The rotor blade of the Magnus type wind power generator according to claim 1, further comprising heating means attached to the first support shaft for heating the barrel.   The rotor blade of the Magnus type wind power generator according to claim 1, wherein a rib parallel to a central axis of the barrel is formed on an inner surface of the barrel.   2. The Magnus wind power generator according to claim 1, wherein the barrel includes a plurality of barrel portions that can be divided in a central axis direction or a circumferential direction, and a connecting portion that connects the adjacent barrel portions. Rotor blades.   The rotor blade of the Magnus type wind power generator according to claim 1, wherein a dimple-like recess or protrusion is formed on an outer surface of the barrel.   The rotor blade of a Magnus type wind power generator according to claim 1, wherein a rib that is parallel, perpendicular or spiral to the central axis of the barrel is formed on an outer surface of the barrel. The plurality of coils are divided in the first support axis direction;
The rotor blades of a Magnus type wind power generator according to claim 1, wherein the divided coils are arranged to be shifted with respect to the rotation direction of the rotor.

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