Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
  • F03D—WIND MOTORS
  • F03D3/00—Wind motors with rotation axis substantially perpendicular to the air flow entering the rotor 
  • F03D3/06—Rotors
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
  • F03D—WIND MOTORS
  • F03D3/00—Wind motors with rotation axis substantially perpendicular to the air flow entering the rotor 
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
  • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
  • F05B2240/00—Components
  • F05B2240/20—Rotors
  • F05B2240/21—Rotors for wind turbines
  • F05B2240/211—Rotors for wind turbines with vertical axis
  • F05B2240/213—Rotors for wind turbines with vertical axis of the Savonius type
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
  • Y02E10/00—Energy generation through renewable energy sources
  • Y02E10/70—Wind energy
  • Y02E10/74—Wind turbines with rotation axis perpendicular to the wind direction

Definitions

• the present invention relates to a Savonius type wind turbine. Background art
• FIG. 1A is a perspective view showing the configuration of a conventional Savonius type wind turbine for describing the principle of the Savonius type wind turbine.
• FIG. 1B is a diagram showing the flow of wind in the Savonius type windmill 500 shown in FIG. 1A.
• the Savonius type windmill 500 has a predetermined rotation axis as the center. And a plurality of blades 5 p rotating with the transmission shaft 3 p in response to wind.
• two blades 5p are connected to a transmission shaft 3P via a connecting member 8p.
• Each blade 5 p has, for example, a semi-cylindrical shape, and is installed on the connecting member 8 p such that a curved inner peripheral surface surrounds the transmission shaft 3 p. This inner peripheral surface becomes the wind receiving surface 5 p-a that receives the wind. At this time, the two blades 5 p are installed so that the wind receiving surfaces 5 p-a face each other and partially overlap.
• iron or FRP Fiber Reinforced Plastics
• reinforcing materials 9 are used at various positions as shown in Fig.1A to secure strength.
• the connecting member 8p is also attached to the blade 5p so as to support the wind receiving surface 5p-a, and can be said to have a function as a reinforcing material.
• the wind hit the windmill 500 shown in Fig. 1A.
• Wind pressure of the wind that hits the wind receiving surface 5 p—a of the blade 5 p (this is called wind pressure) is a, and the wind pressure of the wind that hits the surface opposite to the wind receiving surface 5 p—a of the other blade 5 p
• Wind pressure b is considered to be divided into two wind pressures, wind pressure bl and wind pressure b2.
• the wind that hits the wind receiving surface 5 p—a of one blade 5 p gathers on the transmission shaft 3 p side along the curved wind receiving surface 5 p—a, and the wind receiving surface 5 p—a of the other blade 5 p.
• p This is equivalent to a.
• the wind pressure c cancels a part of the wind pressure b and acts as a force for rotating the windmill 500. Therefore, finally a + b1 + c> b, and the wind pressure c increases the rotation efficiency of the windmill 500.
• the extra pressure receiving surface of the blade is eliminated, so that the back pressure of the blade is reduced. Weight is reduced. As a result, the rotation efficiency of the wind turbine increases.
• the rotation efficiency of the wind turbine is directly related to the power and power generation efficiency obtained by converting the rotation of the wind turbine.
• top plate and the bottom plate are provided so as to expand toward the wind receiving opening, sediment in the opening is automatically discharged, and it is possible to prevent inconvenience such as rotation stop of the windmill. it can.
• the Savonius wind turbine has advantages such as a relatively low wind speed required for starting rotation and almost no noise.To take advantage of these advantages, it is necessary to utilize the Savonius wind turbine further. However, further improvement in rotational efficiency is desired. Disclosure of the invention
• An object of the present invention is to provide a Savonius type wind turbine capable of improving rotation efficiency.
• a windmill according to the present invention includes a rotating member that rotates around a rotation axis, and a plurality of blades that are connected to the rotating member and rotate by receiving wind on a wind receiving surface.
• the wind received on the wind receiving surface is guided to another wind receiving surface, and the area of the wind receiving surface remote from the rotation axis has an area larger than the area of the region close to the rotation axis, and has a shape. It is a windmill.
• the wind hits the wind receiving surface of one of the blades connected to the rotating member.
• the wind receiving surface has a shape in which the area of a region apart from the rotation axis of the rotating member is closer to the rotation axis and larger than the area of the region.
• the wind that hits the area of the wind receiving surface that is far from the rotation axis generates a larger rotation torque than the wind that hits the area near the rotation axis.
• the wind hitting the area away from the rotation axis flows toward the rotating member along the wind receiving surface, and is guided to the wind receiving surface of another blade.
• the wind that is guided by and hits the wind receiving surface of another blade further generates rotational torque.
• the pred rotates efficiently with the rotating member.
• FIG. 1A is a perspective view showing the configuration of a conventional Savonius type wind turbine for describing the principle of the Savonius type wind turbine
• FIG. B is a wind flow in the Savonius type wind turbine shown in FIG. FIG.
• FIG. 2A and 2B are configuration diagrams showing a first embodiment of the wind turbine according to the present invention, wherein FIG. 2A is a plan view and FIG. 2B is an elevation view.
• FIGS. 3A and 3B are diagrams for describing the details of the blade of the wind turbine shown in FIGS. 2A and 2B.
• FIG. 3A is a perspective view
• FIG. 3B is an end face in FIG. 3A.
• Each of the enlarged views of SV 1 is shown.
• FIG. 4A and 4B are plan views of a blade according to a modification of the first embodiment.
• FIG. 4A shows a first modification
• FIG. 4B shows a second modification.
• FIG. 5A to 5C are configuration diagrams showing a second embodiment of the wind turbine according to the present invention, wherein FIG. 5A is a plan view, FIG. 5B is an elevation view, and FIG. 5C is FIG. The end surface SV2 at each is shown.
• FIG. 6A and 6B are configuration diagrams showing a third embodiment of the wind turbine according to the present invention.
• FIG. 6A is a plan view
• FIG. 6B is a cross-section viewed from a cross section II in FIG. 6A. Each figure is shown.
• FIG. 7 is an elevation view showing a configuration of a third embodiment of the wind turbine according to the present invention.
• FIG. 2A and 2B are configuration diagrams showing a first embodiment of a Savonius type wind turbine according to the present invention, wherein FIG. 2A shows a plan view, and FIG. 2B shows an elevation view, respectively. ing.
• the wind turbine 1 according to the first embodiment has a rotor 7, a transmission shaft 3, a speed increaser 16, and a generator 18.
• the row 7 further includes a plurality of blades 5 and a connecting member 8.
• the transmission shaft 3 is formed, for example, in a columnar shape.
• the transmission shaft 3 is supported by a bearing (not shown) so as to protrude partially, and is rotatably installed inside the column 14.
• the column 14 is erected, for example, at the installation location such as the ground.
• the transmission shaft 3 supported in the support 14 rotates around its center axis as a rotation axis.
• a gearbox 16 is connected to the inner end of the support 14 of the transmission shaft 3.
• the transmission shaft 3 is the input shaft of the gearbox 16.
• Gearbox 6 increases the rotation speed of the output shaft by using the torque of the transmission shaft 3 that is the input shaft.
• the output shaft of the gearbox 16 is further connected to the generator 18.
• the generator 18 generates electric power by using the torque of the output shaft of the gearbox 16.
• the rotation force of the output shaft of the gearbox 16 can be converted to power other than electric power by a combination of a crank mechanism and gears.
• the rotor 7 is connected to the end of the transmission shaft 3 projecting from the support 14.
• the rotator 7 and the transmission shaft 3 rotate integrally.
• connection member 8 is formed of two triangular plates that are vertically opposed to each other along the transmission shaft 3 at a predetermined distance.
• Such a connecting member 8 is attached to the transmission shaft 3 with the vertically opposing surfaces orthogonal to the transmission shaft 3.
• One embodiment of the rotating member in the present invention corresponds to the transmission shaft 3 and the connecting member 8 that rotate integrally.
• a plurality of blades 5 for rotating the connection member 8 and the transmission shaft 3 are connected to the connection member 8.
• the plurality of blades 5 are arranged such that the wind receiving surfaces 5a that receive wind for rotation are aligned on the same side in the rotation direction.
• the windmill 1 is a so-called Savonius type windmill,
• the blades 5 are arranged so that the wind received on each wind receiving surface 5 a is guided to the wind receiving surface 5 a of another blade 5.
• the number of blades 5 is two or three or more odd numbers so that the force of the wind flow generated by the blades 5 can be used effectively as described later.
• three blades 5 are connected to each side of the triangular connecting member 8 one by one.
• FIGS. 3A and 2A are views for describing the details of one blade 5, FIG. 3A is a perspective view, and FIG. 3B is an end surface SV 1 of the blade 5 shown in FIGS. 3A and 2A. Are respectively shown on an enlarged scale.
• Each blade 5 is formed using, for example, a composite plate.
• a composite board is a board composed of a core material sandwiched between two veneers.
• As the core material it is preferable to use a material having a high air rate in order to achieve both light weight and strength.
• the air ratio is the ratio of the mass of air to the total mass.
• an aluminum honeycomb panel in which aluminum panels 6a are respectively joined to both surfaces of an aluminum honeycomb core 6b is used as a composite plate.
• the honeycomb core 6b is a panel in which a large number of honeycomb-shaped through holes are formed when viewed from the VP side in a direction perpendicular to the end surface SV1.
• the length of one side of the honeycomb-shaped, ie, hexagonal through-hole is, for example, 10 halls.
• the thickness of the aluminum panel 6a is, for example, one thigh.
• the aluminum panel 6a is adhesively bonded to the honeycomb core 6b.
• the thickness A of the entire aluminum honeycomb panel is, for example, about 50 mm.
• each blade 5 has a curved portion cp.
• R 1 be the radius of curvature of the curved portion cp.
• Aluminum honeycomb panels are easy to process curved surfaces.
• the blade 5 can be manufactured to have such a curved portion cp.
• Each blade 5 is connected to the connecting member 8 such that the transmission shaft 3 is located inside the curved portion CP.
• the surface on the transmission shaft 3 side of each blade 5 is the wind receiving surface 5a.
• the force in the direction perpendicular to the rotation axis of the transmission shaft 3 is the force for rotating the rotating member 10.
• the direction perpendicular to the transmission shaft 3, that is, the radial direction is defined as the length direction of the blade 5, and the length of the blade 5 is defined as shown in FIG. 2A.
• the direction parallel to the rotation axis direction of the transmission shaft 3 is defined as the width direction of the blade 5.
• the blade 5 in the present embodiment is configured such that the width HI of the radially outer end of the wind receiving surface 5a on the transmission shaft 3 side is larger than the width H 2 of the wind receiving surface 5a.
• the area of the region 5a-1 remote from the rotation axis of the transmission shaft 3 is larger than the area of the L ⁇ region 5a-2 near the rotation axis.
• the width between both ends of the wind receiving surface 5a does not necessarily have to change gradually.
• the wind receiving surface 5a is formed to have a shape whose area increases from the side of the rotating shaft toward the direction away from the rotating shaft.
• the shape of the wind receiving surface 5a is not necessarily required to be symmetrical, but in this embodiment, the blade 5 receives a uniform force on the wind receiving surface 5a, and the rotor 7 smoothly moves.
• the wind receiving surface 5a is formed so as to be symmetrical with respect to the central axis AX so as to rotate.
• the blade 5 according to the present embodiment is provided with a rib that guides the wind received on the wind receiving surface 5a toward the transmission shaft 3 and guides it. Have on face 5a.
• the ribs 12 are formed along the peripheral portion of the peripheral surface of the wind receiving surface 5 a of the blade 5 toward the rotation axis of the transmission shaft 3. Provided.
• the ribs 12 are formed using, for example, aluminum.
• the ribs 12 are bonded to the aluminum honeycomb panel by, for example, bonding. As shown in FIG. 3B, let N be the length of the rib 12 protruding from the wind receiving surface 5a.
• the blade 5 is connected to the connection member 8 by connecting the ribs 12 to the connection member 8 using bolts and nuts.
• the blade 5 made of aluminum honeycomb panel has a low specific gravity and has enough strength to support the blade 5 itself. Therefore, the blade 5 is not deformed by its own weight. As a result, the blade 5 according to the present embodiment does not require the reinforcing member 9 shown as a conventional example in FIG. 1A.
• the rotor 7 constituted by using the blade 5 according to the present embodiment may be able to withstand a wind at a wind speed of about 6′0 m / s due to its lightness and high strength.
• the length L is about 2 ⁇
• the width H is about 3m
• the width H2 is about 0.6m o
• the radius of curvature R1 of the curved portion cp is set to about 2 m.
• the radius of curvature R2 of the peripheral portion is, for example, about 2 m.
• the size of the radius of curvature ⁇ of the curved portion cp is set to about l m.
• the length N of the ribs 12 is such that the wind received by the wind receiving surface 5a can be sufficiently captured and guided to the transmission shaft 3 side.
• the ribs 12 are provided in the green part of the wind receiving surface 5a toward the transmission shaft 3, the wind that hits the wind receiving surface 5a is caught by the ribs 12, and the transmission shaft 3 is more efficiently processed. Guided to the side.
• the wind whose wind speed has been increased by being guided to the rib 2 passes between the two plate-shaped connecting members 8 and reaches the wind receiving surface 5 a of the other blade 5 as shown by the arrow WC in FIG. 2A.
• the wind pressure of the wind that hits a certain receiving surface 5a and the wind that hits this receiving surface 5a are different.
• the sum of the wind pressure that occurs when the blade 5 is guided and hits the wind receiving surface 5a of the blade 5 is greater than the resistance to the wind that hits the surface of the blade 5 opposite to the wind receiving surface 5a. Rotates in the direction of arrow RD.
• the transmission shaft 3 rotates.
• the output shaft of the gearbox 16 is rotated by the gearbox 16 connected to the transmission shaft 3 at a rotation speed higher than the rotation speed of the transmission shaft 3.
• each blade 5 in the wind receiving surface 5a of each blade 5, the area of the region 5a_1 remote from the transmission shaft 3 is close to the transmission shaft 3, and the region 5a- Make the shape larger than the area of 2. This means that, as shown in FIG. 3A, an extra area 5b on the transmission shaft 3 side is removed. For this reason, each blade 5 is reduced in weight, and there is no extra resistance surface. Even if the region 5b is removed, there is almost no effect on the region 5a-1 that contributes to the increase in the centrifugal force and the rotational moment that is directly related to the rotational efficiency.
• the rotor 7 can start rotating at a wind speed of, for example, about 1.0 m / s to 1.5 m / s.
• the area of the wind receiving surface 5a is relatively small because the region 5b is removed. For this reason, even if the size of the blade 5 is increased, the mass of the blade 5 is relatively reduced, and it is easy to increase the size of the blade 5 and the wind turbine 1 in order to secure power generation.
• the specific gravity of the aluminum honeycomb panel is small, so that the above-described effect of the weight reduction becomes more remarkable.
• the blade 5 formed by the aluminum honeycomb panel has a strength enough to support its own weight, so that there is no need for a reinforcing material. This also contributes to the reduction in the weight of the rotor 7. Also, as in the first embodiment, the transmission shaft 3 The width of the receiving surface decreases as you go When the blade 5 is formed so as to be as such, the line of the blade 5 becomes smooth and the sense of volume is reduced. Therefore, the effect on the landscape can be suppressed. Forming the blade 5 using an aluminum honeycomb panel without using a reinforcing material is more effective in reducing the sense of volume.
• Such an effect of forming the blade 5 in a shape capable of suppressing the influence on the landscape becomes more remarkable when the blade 5 is enlarged.
• the blade 5 By making the blade 5 a shape that does not affect the landscape, for example, it becomes easier to install the windmill in public places such as homes and parks, and it is possible to promote the use of a Savonius type windmill. .
• the wind speed when the wind hitting a certain wind receiving surface 5 a is guided to another wind receiving surface 5 a is increased, and the other wind receiving surface 5 a is increased.
• the wind pressure generated when hitting 5a can be increased.
• This wind pressure corresponds to the wind pressure c when the principle of the Savonius type wind turbine is described using FIGS. 1A and 1B. Since the wind pressure c is increased compared to the conventional case, the rotational efficiency of the rotor 7 and the power generation efficiency of the windmill ⁇ are improved as compared with the conventional case.
• the shape of the blade 5 is not limited to the shape shown in the first embodiment. Hereinafter, a modification of the first embodiment in which the shape of the blade is changed will be described.
• FIG. 4A and 4B are plan views of a blade according to a modification of the first embodiment.
• FIG. 4A shows a first modification
• FIG. 4B shows a second modification.
• the wind turbine according to the present modification is the same as the wind turbine 1 according to the first embodiment except for the shape of the blade. Therefore, the same components are denoted by the same reference numerals, and detailed description is omitted.
• a blade 50 according to a second modification shown in FIG. 4A is a blade in which the side 5 OS of the green part toward the transmission shaft 3 on which the rib 2 is provided is straightened.
• the blade 51 according to the second modification shown in FIG. This is a blade in which the side 5 IS of the peripheral portion toward the dynamic shaft 3 side is convexly swelled, opposite to the blade 5 according to the first embodiment, in which the side 5 IS is concavely depressed.
• the ratio between the length L and the widths HI and H2 is set to have the same relationship as in the first embodiment.
• the radius of curvature R 3 is For example, about 1 Offfl.
• the radius of curvature of the side 51S is, for example, the same as the radius of curvature R2 of the peripheral green portion provided with the ribs 12 of the blade 5 according to the first embodiment.
• the sense of volume is reduced as compared with the conventional blade, and the influence on the landscape can be suppressed as in the case of the first embodiment.
• the above-described modified embodiment is an embodiment in which the shape of the side of the peripheral green portion where the ribs 12 are provided is changed.
• an example in which the shape of the wind receiving surface 5a of the blade 5 is changed will be described as a second embodiment.
• 5A to 5C are configuration diagrams showing a second embodiment of the Savonius type wind turbine according to the present invention.
• the windmill according to the second embodiment] 0 uses a blade 60 instead of the blade 5.
• the other points are the same as those of the wind turbine 1 according to the first embodiment, so that the same components are denoted by the same reference numerals and detailed description thereof will be omitted.
• FIG. 5A shows a plan view of the wind turbine 100
• FIG. 5B shows an elevation view
• FIG. 5C shows the end surface SV2 of the blade 60 in FIG. 5A.
• the blade 60 according to the second embodiment is similar to the blade 5 according to the first embodiment.
• the wind receiving surface 60a is formed so that the wind hitting a certain blade 60 flows toward another blade 60 as shown by an arrow WC in FIG. 5A.
• the width of the wind receiving surface 6 O a in the direction along the rotation axis direction of the transmission shaft 3 gradually increases as going from the transmission shaft 3 side to the direction away from the transmission shaft 3.
• uneven portions 6Oa-d as shown in FIG. 5C are provided on the wind receiving surface 6Oa of the blade 60 as described above.
• the uneven portions 6Oa-d are formed by, for example, bending a veneer used for forming the blade 60.
• the blade 60 By bending the blade 60, a streaky or pleated uneven portion 6Oa-d as shown in FIG. 5B is formed. As shown in Fig. 5B, the direction of the streaks 6Oa-g generated by the formation of the irregularities 60a-d is such that the wind hitting the wind receiving surface 60a is guided to the transmission shaft 3 side and flows. The direction from the end face SV2 side to the transmission shaft 3 side.
• the blade 60 can also be formed by joining a member having the same shape as the uneven portions 60a-d to the veneer.
• the unevenness is arranged in the direction along the transmission axis 3 orthogonal to the streaks 6Oa-g. Since the uneven portions 6Oa-d serve as a support member for the force in the direction along the transmission shaft 3, the strength against the force in the direction along the transmission shaft 3 increases. .
• the presence of the uneven portion 6 O a-d allows the plate having the same thickness B as the height of the convex portion of the uneven portion 6 O a-d. It is thought that the strength will be about the same as that.
• the strength in the thickness direction can be adjusted by changing the height of the projections of the uneven portions 6Oa-d.
• the strength of the blade 60 increases due to the presence of the uneven portions 6Oa-d. For this reason, it is not always necessary to use a composite plate such as an aluminum honeycomb panel. It is not necessary to form 60.
• the blade 60 can be formed using various steels such as iron and SUS, aluminum veneer, and FRP. Even when iron or RFP is used, the reinforcing member 9 as shown in FIG. 1A is not required by forming the blade 60 having the irregularities 60 a_ d. In FIG.5C, the members are present on the surface 60C opposite to the wind receiving surface 6Oa of the blade 60, but this reduces the resistance when the blade 60 rotates. For the purpose.
• the streaks 60a-g play the same role as the ribs 12 of the first embodiment, and catch the wind received by the wind receiving surface 60a and guide it to the transmission shaft 3 side.
• the width of the line 6 O ag becomes narrower toward the transmission shaft 3, so that the flow velocity of the wind increases toward the transmission shaft 3. Therefore, similarly to the case of the first embodiment, the wind pressure of the wind hitting the wind receiving surface 6Oa of another blade 60 as indicated by the arrow increases.
• the operation of the windmill 100 due to the wind flowing as described above is the same as that of the windmill 1 of the first embodiment, and therefore detailed description is omitted.
• the reinforcing material 9 can be used even when a material that conventionally required the reinforcing material 9 is used.
• the blade 60 can be formed without using it.
• the effect of forming the blade 60 without using the reinforcing material 9 and reducing the area of the wind receiving surface 60 a on the transmission shaft 3 side is the same as that of the first embodiment and its modified embodiment. Is the same.
• the rotor of the wind turbine is exposed to the outside as it is.
• a Savonius wind turbine in which a rotor is covered by a predetermined cover will be described.
• FIG. 6A and FIG. 6B are configuration diagrams showing a windmill 200 according to the third embodiment.
• FIG. 6A is a plan view of the wind turbine 200
• FIG. 6B is a cross-sectional view taken along a section II in FIG. 6A.
• the windmill 200 uses a ginkgo-shaped blade 61 as a blade for rotating the rotating member 10 based on the principle of the Savonius type windmill. It has a wire mesh 80 covering the rotor 70 used. Further, a light emitting body Lt such as a bulb is appropriately attached to the blade 61 and the wire netting 80.
• the configuration and operation of the wind turbine 200 according to the third embodiment are the same as those of the wind turbine according to the previous embodiments. Is omitted.
• the area of the wind receiving surface of the blade 61 on the side of the transmission shaft 3 is small, and the area of the region remote from the transmission shaft 3 is large.
• the blade 61 is formed so as to have a ginkgo shape when viewed from a direction perpendicular to the rotation axis of the transmission shaft 3.
• ribs 120 are provided not only on the side facing the transmission shaft 3 but also on the side opposite to the transmission shaft 3 among the sides forming the peripheral green portion of the blade 61. ing.
• the maximum width H3 of the blade 61 in the direction along the transmission shaft 3 is about 35 O ram.
• the turning radius R 4 of the blade 61 connected to the connecting member 8 is, for example, about 35 O mm.
• the weight of the blade 61 is reduced. As a result, the blade 61 can support its own weight. Therefore, even when the blade 61 is formed using not only the aluminum honeycomb panel but also various materials such as iron, FRP, and plastic, the reinforcing material 9 becomes unnecessary.
• a mesh crimp wire mesh is used for the wire mesh 80.
• a material of the wire mesh 80 for example, a metal such as iron or stainless steel can be used.
• the wire mesh 80 is manufactured, for example, by dividing it into two hemispherical portions that are joined along a direction along the transmission shaft 3 or along a direction orthogonal thereto. Here, it is assumed that they are formed vertically in two on a plane perpendicular to the transmission shaft 3. The lower hemispherical part of the wire mesh 80 is fixed to the support 14 by the fasteners 82a. At this time, the transmission shaft
• the blade 6 1 is connected to the transmission shaft 3 via the connecting member 8, fixed and fixed.
• the upper hemispherical portion of the wire mesh 80 is overlapped with and joined to the lower hemispherical portion so as to cover the rotor 70.
• the upper and lower hemispherical portions can be disassembled by fixing the joints on the side surfaces with fasteners as shown in FIG. 6B.
• the wire mesh 80 is fixed to the support 14, but the rotor 70 and the transmission shaft 3 are rotatable with respect to the support 14.
• the rotor 70 is covered with the wire mesh 80, and the rotor 70 is disposed inside the wire mesh 80.
• the luminous body Lt can be attached to the blade 61 and the wire netting 80.
• the luminous body is attached to a portion of the wire mesh 80 that does not affect the rotation of the rotor 70.
• As the luminous body Lt for example, a light bulb or a light emitting diode is used.
• Electric power for light emission of the light emitter Lt is supplied from the generator 18 of the windmill 200. If a known slip ring mechanism is used, power can be easily supplied to the rotating blade 61. It is possible to
• the luminous body Lt emits light by the electric power generated by the generator 18.
• the light emitted inside the wire mesh 80 leaks out of the wire mesh 80 through the gap between the wire mesh 80.
• the light-emitting elements Lt can be arranged as freely as possible on the wire netting 80, and the degree of freedom in the arrangement of the light-emitting elements Lt is improved.
• the windmill 200 having the light-emitting body Lt and having a reduced size can be used not only as a prime mover but also as a lighting device such as a streetlight in a place such as a road or a park.
• FIG. 7 is an elevational view showing the configuration of the wind turbine according to the present embodiment.
• the connected wind turbine 300 includes a plurality of rotors 70-1, 70-2, It has 70-3, 70-4, a communication shaft 40, a plurality of gearboxes 16-1, 16-2, 16-3, and columns 14.
• Multiple transmission shafts 31, 32, 33, and 34 are connected to a plurality of rotors 70_ ;! to 70-4, respectively, and are integrated with rotors 70-1 to 70-4. ing.
• Each of the transmission shafts 31-34 and each of the gearboxes 16- ⁇ through 16-3 have a hollow structure capable of accommodating the communication shaft 40 on the inner peripheral side.
• the column 14 is erected, for example, at the installation location such as the ground.
• the communication shaft 40 is connected to and fixed to the support ⁇ 4 so as to extend from the support 14. From low to high, in order from low to high, 70--4, gearbox 16-3, mouth 70--3, gearbox 16-2, rotor 70-2, gearbox 16-1 and the rotor 70-1 are connected and arranged along the communication shaft 40 with the communication shaft 40 communicating with the inner peripheral side. Each gearbox 16-1 to I-6-3 is fixed to the communication shaft 40.
• the transmission shaft 31 is the input shaft of the high speed gear 16-1
• the transmission shaft 32 is the output shaft of the speed increaser 16-1 and the input shaft of the high speed gear 16-2.
• the transmission shaft 33 is the output shaft of the gearbox 16-2 and the input shaft of the high-speed gear 16-3.
• the transmission shaft 34 becomes the output shaft of the gearbox 16-3.
• Each of the rotors 70 _ 1 to 70-4 integrated with each of the transmission shafts 31 to 34 is freely rotatable around the communication shaft 40. However, the communication shaft 40 does not rotate.
• the rotors 70-1 to 70-4 the rotors according to the first to third embodiments are appropriately used. They can be used in combination.
• the area of the wind receiving surface is increased as the blade of the lower rotor is increased to increase the mass.
• the area of the wind receiving surface of each blade of the rotor according to the first to third embodiments is larger in an outer region. For this reason, the mass of each blade is basically larger toward the outside in the radial direction. Good.
• Gearboxes 16-1 to I-6-3 are set so that the lower the gearbox, the greater the load.
• Each of the low winds 70-] to 70-4 that have received the wind rotates in a predetermined direction.
• the rotation of the transmission shaft 3] is used for rotation of the transmission shaft 32 by the speed increaser 16-1.
• the rotation of the transmission shaft 32 is used for rotation of the transmission shaft 33 by the gearbox ⁇ 6-2.
• the rotation of the transmission shaft 33 is used for the rotation of the transmission shaft 34 by the speed reducer 16-3.
• the lower rotor can also be rotated.
• the masses of the blades 70-1 to 70-4 increase toward the outside in the radial direction.
• the centrifugal force and rotational moment during the rotation of the blades work effectively, increasing the rotational force of each of the started rotors 70_1 to 70-4 and increasing the rotation time. 09395 Therefore, it is possible to generate power efficiently even with small wind power.
• the lower rotor since the lower rotor has a larger air receiving surface area and a larger mass, more energy obtained by rotation can be stored.
• the windmill 300 by providing a plurality of openings along the communication axis 40, it is possible to rotate each row even if the wind power is small. ing. Therefore, energy such as electric power obtained from the windmill 300 can be increased. Since the rotation efficiency of each rotor of the windmill 300 is improved as compared to the first to third embodiments, energy can be obtained more efficiently than before.
• each row 70-] to 70-4 and each gearbox 6- :! Wind can be effectively used simply by connecting ⁇ 16-3 along the vertical direction. For this reason, it is possible to suppress an increase in the cost of manufacturing and installing the windmill 300, and to provide it at a low cost.
• each blade such as blade 5 and the rotating member 10 may be integrally formed.
• each blade may be formed using an aluminum honeycomb panel. Industrial availability
• the windmill of the present invention can be used as a lighting device such as a streetlight in addition to a power generator and a motor using wind.

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• 2003
  • 2003-06-25 JP JP2003181720A patent/JP4570851B2/ja not_active Expired - Fee Related
• 2004
  • 2004-06-25 CN CNA2004800178028A patent/CN1813128A/zh active Pending
  • 2004-06-25 WO PCT/JP2004/009395 patent/WO2004113721A1/ja active Application Filing
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