CA2940584C - Turbine mechanism - Google Patents

Turbine mechanism Download PDF

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Publication number
CA2940584C
CA2940584C CA2940584A CA2940584A CA2940584C CA 2940584 C CA2940584 C CA 2940584C CA 2940584 A CA2940584 A CA 2940584A CA 2940584 A CA2940584 A CA 2940584A CA 2940584 C CA2940584 C CA 2940584C
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Prior art keywords
posture
yield
swing
lift force
blade
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CA2940584A
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French (fr)
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CA2940584A1 (en
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Natsunojo Ishikawa
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03BMACHINES OR ENGINES FOR LIQUIDS
    • F03B13/00Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates
    • F03B13/12Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy
    • F03B13/26Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using tide energy
    • F03B13/264Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using tide energy using the horizontal flow of water resulting from tide movement
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03BMACHINES OR ENGINES FOR LIQUIDS
    • F03B17/00Other machines or engines
    • F03B17/06Other machines or engines using liquid flow with predominantly kinetic energy conversion, e.g. of swinging-flap type, "run-of-river", "ultra-low head"
    • F03B17/062Other machines or engines using liquid flow with predominantly kinetic energy conversion, e.g. of swinging-flap type, "run-of-river", "ultra-low head" with rotation axis substantially at right angle to flow direction
    • F03B17/065Other machines or engines using liquid flow with predominantly kinetic energy conversion, e.g. of swinging-flap type, "run-of-river", "ultra-low head" with rotation axis substantially at right angle to flow direction the flow engaging parts having a cyclic movement relative to the rotor during its rotation
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05BINDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2240/00Components
    • F05B2240/20Rotors
    • F05B2240/21Rotors for wind turbines
    • F05B2240/211Rotors for wind turbines with vertical axis
    • F05B2240/218Rotors for wind turbines with vertical axis with horizontally hinged vanes
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/20Hydro energy
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/30Energy from the sea, e.g. using wave energy or salinity gradient

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Oceanography (AREA)
  • Hydraulic Turbines (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)

Abstract

A turbine mechanism 4A includes a rotating shaft 10, a pair of swing blades 30 disposed point-symmetrically with respect to the rotating shaft 10, and a rotating plate 20 for coupling the pair of swing blades 30 to the rotating shaft 10 to integrally rotate the pair of swing blades 30 about the rotating shaft 10. The swing blade 30 is swingable between an erect posture that is erect with respect to a flow direction of a fluid and a yield posture that is along the flow direction of the fluid. The swing blade 30 has a yield lift force generating face that produces a lift force to the yield posture by a collision with the fluid, and an erect lift force generating face that produces a Lift force to the erect posture by a collision with the fluid.

Description

DESCRIPTION
TURBINE MECHANISM
Technical Field [0001]
The present invention relates to a turbine mechanism.
Background Art
[0002]
From the viewpoint of the present energy situation and environmental protection, attention is being given to power generation methods using renewable energy. As the power generation methods using the renewable energy, photovoltaic power generation, wind power generation, tidal power generation, and the like receive attention in particular. As to the tidal power generation, there is known, for example, Japanese Patent Application Laid-Open No. 2003-13834.
[0003]
A tidal power generation system according to Japanese Patent Application Laid-Open No. 2003-13834 (Patent Literature 1) is provided with a turbine mechanism that converts water flow energy into rotational energy with the use of turbine blades disposed in a rotational orbit in water. In this turbine mechanism, a regulation member for regulating the postures of the turbine blades switches the postures of the turbine blades so that the postures of the turbine blades are each orthogonal to a water flow while moving along the water flow, and the postures of the turbine blades are each in parallel to the water flow while moving against the water flow.
Summary of Invention Technical Problem
[0004]
However, in the turbine mechanism described in Patent Literature 1, since there is a need to establish the rotational orbit of the turbine blades in accordance with the direction of the water flow, the turbine mechanism produces an effect on the condition that the water flow is maintained in a certain direction, but produces little effect on the condition that the water flow is variable.
[0005]
Considering the above circumstance, the present invention aims to provide a turbine mechanism that can convert water flow energy into rotational energy on the condition that the direction of a water flow is variable.
Solution to Problem
[0006]
The present invention is a turbine mechanism for converting kinetic energy of a fluid into rotational energy, the turbine mechanism including: a rotating shaft rotatable about an axial line thereof; a pair of swing blades disposed point-symmetrically with respect to the axial line of the rotating shaft; and a coupling mechanism for coupling the pair of swing blades to the rotating shaft so that the pair of swing blades rotate about the axial line of the rotating shaft in an integral manner. The turbine mechanism is characterized in that each of one and the other of the pair of swing blades is swingable about a blade shaft disposed around the rotating shaft between an erect posture that is erect with respect to a flow direction of the fluid and a yield posture that is along the flow direction of the fluid; that each swing blade has a yield lift force generating face for generating a lift force to the yield posture when the swing blade in the yield posture collides with the fluid flowing from the side of the blade shaft toward the side of a tip portion thereof, and an erect lift force generating face provided on a side opposite to the yield lift force generating face, for generating a lift force to the erect posture when the swing blade in the yield posture collides with the fluid flowing from the side of the tip portion toward the side of the blade shaft; and that on the condition that the fluid flows in one direction, the lift force to the yield posture is generated in one of the pair of swing blades by the collision of the fluid with the yield lift force generating face of the swing blade, while the lift force to the erect posture is generated in the other of the pair of swing blades by the collision of the fluid with the erect lift force generating face of the swing blade.
[0007]

In the swing blade in the yield posture, the erect lift force generating face is preferably disposed near the coupling mechanism, closer than the yield lift force generating face.
[0008]
When a first flow vector is defined as a flow vector of the fluid flowing from the side of the blade shaft toward the side of the tip portion of the swing blade in the yield posture, an angle formed between the first flow vector and a normal vector of the yield lift force generating face preferably decreases from the side of the tip portion toward the side of the blade shaft, in either case where the swing blade is in the yield posture or the erect posture. Also, when a second flow vector is defined as a flow vector of the fluid flowing from the side of the tip portion toward the side of the blade shaft of the swing blade in the yield posture, an angle formed between the second flow vector and a normal vector of the erect lift force generating face preferably decreases from the side of the blade shaft toward the side of the tip portion, in either case where the swing blade is in the yield posture or the erect posture.
Advantageous Effects of Invention
[0009]
According to the present invention, it is possible to convert the water flow energy into the rotational energy on the condition that the water flow is variable.

Brief Description of Drawings
[0010]
Fig. 1 is a block diagram showing the schematic configuration of a power generation system.
Fig. 2 is a perspective view showing the schematic structure of a turbine mechanism.
Fig. 3 is a side view showing the schematic structure of a swing blade that is swingable between an erect posture and a yield posture.
Fig. 4 is another side view showing the schematic structure of the swing blade that is swingable between the erect posture and the yield posture.
Fig. 5 is a side view of the swing blade in which angles formed between a flow direction of a water flow and a normal vector of a yield lift force generating face are shown.
Fig. 6 is a side view of the swing blade in which angles formed between the flow direction of the water flow and a normal vector of an erect lift force generating face are shown.
Fig. 7 is another perspective view showing the schematic structure of the turbine mechanism.
Fig. 8 is a perspective view showing the schematic structure of another turbine mechanism.
Fig. 9 is a perspective view showing the schematic structure of yet another turbine mechanism.
Description of Embodiments
[0011]
Embodiments of the present invention will be hereinafter described with reference to the accompanying drawings.
[0012]
As shown in Fig. 1, a power generation system 2 is provided with a tidal power generator 4 for generating electric power from tidal energy, an electric power converter 5 for converting the electric power generated by the tidal power generator 4, a storage battery 6 for storing the electric power converted by the electric power converter 5, and a voltage transformer 7 for transforming the electric power stored in the storage battery 6 to electric power for delivery. This power generation system 2 can supply each user 8 with the electric power generated by the tidal power generator 4 through power transmission lines. The tidal power generator 4 includes a turbine mechanism 4A for converting water flow energy into rotational energy, and a generator 4B
for generating the electric power with the use of the rotational energy generated by the turbine mechanism 4A.
[0013]
Next, the turbine mechanism 4A will be described in detail.
[0014]
As shown in Fig. 2, the turbine mechanism 4A is provided with a rotating shaft 10 rotatable about an axial line of itself (hereinafter called rotation axial line) RX, a disk-shaped rotating plate 20 fixed to the rotating shaft 10, a pair of swing blades 30 that are disposed point-symmetrically with respect to the rotation axial line RX, and swing mechanisms 40 disposed on the rotating plate 20 to swing the respective swing blades 30. The generator 4B (see Fig. 1) is connected to one end of the rotating shaft 10. The rotating plate 20, which is fixed to the rotating shaft 10, rotates about the rotation axial line RX together with the rotation of the rotating shaft 10. The swing blades 30 are attached to the rotating plate 20 through the respective swing mechanisms 40.
Thus, the pair of swing blades 30 integrally rotate each other about the axial line RX of the rotating shaft 10 in accordance with the rotation of the rotating shaft 10.
[0015]
Each swing mechanism 40 includes a blade shaft 41 rotatable about an axial line of itself (hereinafter called blade axial line) BX, and a pair of shaft support bases 42 for supporting respective ends of the blade shaft 41 in a rotatable manner.
[0016]
The pair of shaft support bases 42 are each fixed in an erect posture on a mount surface 20M of the rotating plate 20.
The pair of shaft support bases 42 each have a hole into which the blade shaft 41 is inserted. The swing blade 30 has, at its base portion 30B, a hole through which the blade shaft 41 is inserted. By inserting the blade shaft 41 into the holes of the pair of shaft support bases 42 and the hole of the swing blade 30, the pair of shaft support bases 42 support the swing blade 30 in a swingable manner about the blade axial line BX.
It is noted that the blade axial line BX in the state of being supported by the pair of shaft support bases 42 extends in a radial direction centering on the rotation axial line RX.
[0017]
Each swing mechanism 40 is further provided with retaining members 45. The retaining members 45 are attached to both ends of the blade shaft 41 rotatably supported by the pair of shaft support bases 42. The retaining members 45 prevent the blade shaft 41 from dropping off the pair of shaft support bases 42.
[0018]
Next, the swing blade 30 will be described in detail.
[0019]
As shown in Figs. 3 and 4, the swing blade 30 is switchable by the swing mechanism 40 between a posture (hereinafter called erect posture) that is erect with respect to the mount surface 20M and a posture (hereinafter called yield posture) that is lying with respect to the mount surface 20M, as described above. The erect posture corresponds to parts shown by chain double-dashed lines in Figs. 3 and 4, and the yield posture corresponds to parts shown by solid lines in Figs. 3 and 4.
[0020]
The swing blade 30 includes the base portion 30B, a tip portion 30S, and a middle portion 300 formed between the base portion 30B and the tip portion 30S. Note that, it is preferable that the middle portion 30C extend in a predetermined direction and the thickness of the middle portion 300 decrease from the base portion 30B toward the tip portion 30S. It is also preferable that in the swing blade 30 in the yield posture, the tip portion 30S be formed such that it is separated away from the mount surface 20M increases with a distance away from the base portion 30B. The swing blade 30 is formed with an erect lift force generating face 30K on a side facing to the mount surface 20M when the swing blade 30 is in the yield posture, and a yield lift force generating face 30H on a side opposite to the erect lift force generating face 30K. The erect lift force generating face 30K and the yield lift force generating face 30H are each formed so as to extend from the middle portion 300 to the tip portion 30S.
[0021]
As shown in Fig. 5, when a flow vector VL1 is defined as a flow vector of a fluid flowing from the side of the blade shaft 41 toward the side of the tip portion 30S of the swing blade 30 in the yield posture, an angle 01 formed between the flow vector VL1 and a normal vector Ni of the yield lift force generating face 30H decreases from the side of the tip portion 30S toward the side of the blade shaft 41, in either case where the swing blade 30 is in the yield posture or the erect posture. The above-described angle 01 is an angle formed clockwise from the flow vector VL1 in the drawing.
[0022]
Also, when the swing blade 30 is in the yield posture, the distance CLH between the yield lift force generating face 30H and the mount surface 20M preferably increases from the side of the base portion 30B toward the side of the tip portion 30S.
[0023]
As shown in Fig. 6, when a flow vector VL2 is defined as a flow vector of a fluid flowing from the side of the tip portion 30S of the swing blade 30 in the yield posture toward the side of the blade shaft 41, an angle 02 formed between the flow vector VL2 and a normal vector N2 of the erect lift force generating face 30K decreases from the side of the blade shaft 41 toward the side of the tip portion 30S, in either case where the swing blade 30 is in the yield posture or the erect posture. The above-described angle 02 is an angle formed clockwise from the flow vector VL2 in the drawing.
[0024]
Also, when the swing blade 30 is in the yield posture, the distance CLK between the erect lift force generating face 30K and the mount surface 20M preferably decreases from the side of the tip portion 30S toward the side of the base portion 308.
[0025]
Referring back to Fig. 3, the turbine mechanism 4A
includes an erect posture stopper 50K provided in the swing blade 30, and a yield posture stopper 50H provided in the swing blade 30. The erect posture stopper 50K engages with the rotating plate 20, when the swing blade 30 is in the erect posture. Thereby, the erect posture stopper 50K maintains the swing blade 30 in the erect posture. The yield posture stopper 50H engages with the rotating plate 20, when the swing blade 30 is in the yield posture. Thereby, the yield posture stopper 50H maintains the swing blade 30 in the yield posture.
[0026]
Next, the operation of the turbine mechanism 4A will be described.
[0027]
When the turbine mechanism 4A is disposed in water, as shown in Fig. 2, a water flow in a predetermined direction flows toward the respective swing blades 30 disposed in pair.
Consequently, the flow direction of the water flow coincides with the vector VL1 in one of the pair of swing blades 30 (see Fig. 5). Since the water flow of the vector VL1 collides with the yield lift force generating face 30H, a lift force occurs to make the swing blade 30 in the yield posture, irrespective of whether the swing blade 30 is in the yield posture or the erect posture, so that the swing blade 30 becomes in the yield posture (see Figs. 2 and 3).
[0028]
In the other swing blade 30, the flow direction of the water flow coincides with the vector VL2 (see Fig. 6). Since the water flow of the vector VL2 collides with the erect lift force generating face 30K, a lift force occurs to make the swing blade 30 in the erect posture, irrespective of whether the swing blade 30 is in the yield posture or the erect posture, so that the swing blade 30 becomes in the erect posture (see Figs. 2 and 4).
[0029]
As described above, one of the pair of swing blades 30, which are disposed point-symmetrically with respect to the rotating shaft 10, becomes in the erect posture and the other becomes in the yield posture due to the collision with the water flow. The swing blade 30 in the erect posture converts the kinetic energy of the water flow into the rotational energy about the rotating shaft 10 by the collision with the water flow. On the other hand, the swing blade 30 in the yield posture, which is a posture along the water flow, has a low resistance to the water flow. Thus, the rotating plate 20 rotates about the rotating shaft 10 by the rotational energy produced by the swing blade 30 in the erect posture.
[0030]
When reversing the direction of the water flow, as shown in Fig. 7, the swing blade 30 in the erect posture is changed to the yield posture because the water flow collides with the yield lift force generating face 30H, while the swing blade 30 in the yield posture is changed to the erect posture because the water flow collides with the erect lift force generating face 30K. Therefore, the rotating plate 20 rotates about the rotating shaft 10 by the rotational energy produced by the swing blade 30 in the erect posture.
[0031]
As described above, since the pair of swing blades 30, which are disposed point-symmetrically with respect to the rotating shaft 10, each have the yield lift force generating face 30H in one face and the erect lift force generating face 30K in the opposite face, even if the direction of the water flow is changed, such a state where one of the pair of swing blades 30 becomes in the erect posture and the other becomes in the yield posture can be maintained by the collision with the water flow. As a result, even in the case of changing the direction of the water flow, the kinetic energy of the water flow can be converted into the rotational energy about the rotating shaft 10. Also, in the turbine mechanism 4A, since the swing blade 30 is switched between the erect posture and the yield posture in accordance with the direction of the water flow, there is no need for providing a regulation member for regulating the postures of turbine blades, as described in Patent Literature 1. Thus, the turbine mechanism 4A has a simpler structure than a conventional mechanism. This facilitates ease of manufacture with low costs.
[0032]
Also, since the distance CLK (see Fig. 6) between the erect lift force generating face 30K and the mount surface 20M
decreases from the side of the tip portion 30S toward the side of the base portion 30B in a state where the swing blade 30 is in the yield posture, it is possible to obtain a larger lift force to the erect posture by the collision of the water flow flowing from the side of the tip portion 30S toward the side of the base portion 30B with the erect lift force generating face 30K of the swing blade 30 in the yield posture.
[0033]
Likewise, since the distance CLH (see Fig. 5) between the yield lift force generating face 30H and the mount surface 20M
increases from the side of the base portion 30B toward the side of the tip portion 30S in a state where the swing blade is in the yield posture, it is possible to obtain a larger lift force to the yield posture by the collision of the water 25 flow flowing from the side of the base portion 30B toward the side of the tip portion 30S with the yield lift force generating face 301-I of the swing blade 30 in the yield posture.
[0034]
When the swing blade 30 is in the yield posture, providing a space to pass the water flow between the swing blade 30 and the mount surface 20M makes the water flow between the swing blade 30 in the yield posture and the rotating plate 20 smooth, thus reducing a resistance occurring in the swing blade 30 in the yield posture. Therefore, the yield posture stopper 50H, as a yield posture engaging member, is preferably provided only in a part (for example, an edge or midpoint in a width direction) of the swing blade 30 in a width direction, instead of providing it across the width direction (a direction normal to the drawing in Fig. 3).
[0035]
It is noted that the yield posture stopper 50H as the yield posture engaging member may be omitted. In the case of omitting the yield posture stopper 50H, the mount surface 20M
functions as the yield posture engaging member.
[0036]
Although the single pair of swing blades 30 are provided in the above embodiment, the present invention is not limited to this but a plurality of pairs of swing blades 30, for example, two pairs of swing blades 30 may be provided.
Moreover, the arrangement pitch of the swing blades 30 around the rotating shaft 10 is preferably uniform, and may be, for example, one-fourth of a circumference (a pitch angle of 90 ), one-sixth (a pitch angle of 60 ), or one-eighth (a pitch angle of 45 ) (see Fig. 8). In addition, it is more preferable that the arrangement pitch of the swing blades 30 be one-sixth (a pitch angle of 60 ) or one-eighth (a pitch angle of 45 ) because of the energy efficiency of the turbine mechanism 4A
when shifting from a stationary state to a rotational state (see Fig. 8). With this configuration, the rotational energy can be taken out of the kinetic energy of the water flow flowing in any direction with reliability.
[0037]
Although the blade shafts 41 extend in the radial direction centering on the rotation axial line RX in the above embodiment, the present invention is not limited to this but the blade shafts 41 may extend in a direction crossing the radial direction. Also, the blade shafts 41 may extend in a direction crossing the mount surface 20M, instead of a direction parallel to the mount surface 20M.
[0038]
Although the rotating plate 20 is used as a coupling mechanism for coupling the pair of swing blades 30 to the rotating shaft 10 in the above embodiment, the present invention is not limited to this, but one or two or more rotating bars 70 may be used instead of the rotating plate 20 (see Fig. 9).
[0039]
Otherwise, a cylindrical rotating column may be provided instead of the rotating plate 20. In this case, the pair of swing blades 30 may be disposed on either the bottom face or the periphery of the rotating column.
[0040]
It is noted that the erect posture of the swing blade 30 is defined as the position that is erect with respect to the mount surface 20M, but the present invention is not limited to this as long as the erect posture is a position that is erect with respect to the direction of the water flow. Likewise, the yield posture of the swing blade 30 is defined as the position that is lying with respect to the mount surface 20M, but the present invention is not limited to this as long as the yield posture is a position that is along the direction of the water flow.
[0041]
It is noted that the present invention is not limited to the embodiments described above, but as a matter of course, various modifications can be made thereto without departing from the scope of the present invention.

Claims (3)

1. A turbine mechanism for converting kinetic energy of a fluid into rotational energy, the turbine mechanism comprising:
a rotating shaft rotatable about an axial line thereof;
a pair of swing blades disposed point-symmetrically with respect to the axial line of the rotating shaft; and a coupling mechanism for coupling the pair of swing blades to the rotating shaft so that the pair of swing blades rotate about the axial line of the rotating shaft in an integral manner, the turbine mechanism being characterized in that each of one and the other of the pair of swing blades is swingable about a blade shaft disposed around the rotating shaft between an erect posture that is erect with respect to a flow direction of the fluid and a yield posture that is along the flow direction of the fluid;
that each swing blade has a yield lift force generating face for generating a lift force to the yield posture when the swing blade in the yield posture collides with the fluid flowing from a side of the blade shaft toward a side of a tip portion thereof, and an erect lift force generating face provided on a side opposite to the yield lift force generating face, for generating a lift force to the erect posture when the swing blade in the yield posture collides with the fluid flowing from the side of the tip portion toward the side of the blade shaft; and that on the condition that the fluid flows in one direction, the lift force to the yield posture is generated in one of the pair of swing blades by the collision of the fluid with the yield lift force generating face of the swing blade, while the lift force to the erect posture is generated in the other of the pair of swing blades by the collision of the fluid with the erect lift force generating face of the swing blade;
wherein in the swing blade in the yield posture, the erect lift force generating face is disposed near the coupling mechanism, closer than the yield lift force generating face;
and when a first flow vector is defined as a flow vector of the fluid flowing from a side of the blade shaft toward a side of the tip portion of the swing blade in the yield posture, an angle formed between the first flow vector and a normal vector of the yield lift force generating face decreases from the side of the tip portion toward the side of the blade shaft, in either case where the swing blade is in the yield posture or the erect posture.
2. The turbine mechanism according to claim 1, wherein when a second flow vector is defined as a flow vector of the fluid flowing from the side of the tip portion toward the side of the blade shaft of the swing blade in the yield posture, an angle formed between the second flow vector and a normal vector of the erect lift force generating face decreases from the side of the blade shaft toward the side of the tip portion, in either case where the swing blade is in the yield posture or the erect posture.
3. A turbine mechanism for converting kinetic energy of a fluid into rotational energy, the turbine mechanism comprising:
a rotating shaft rotatable about an axial line thereof;
a pair of swing blades disposed point-symmetrically with respect to the axial line of the rotating shaft; and a coupling mechanism for coupling the pair of swing blades to the rotating shaft so that the pair of swing blades rotate about the axial line of the rotating shaft in an ntegral manner, the turbine mechanism being characterized in that each of one and the other of the pair of swing blades is swingable about a blade shaft disposed around the rotating shaft between an erect posture that is erect with respect to a flow direction of the fluid and a yield posture that is along the flow direction of the fluid;
that each swing blade has a yield lift force generating face for generating a lift force to the yield posture when the swing blade in the yield posture collides with the fluid flowing from a side of the blade shaft toward a side of a tip portion thereof, and an erect lift force generating face provided on a side opposite to the yield lift force generating face, for generating a lift force to the erect posture when the swing blade in the yield posture collides with the fluid flowing from the side of the tip portion toward the side of the blade shaft; and that on the condition that the fluid flows in one direction, the lift force to the yield posture is generated in one of the pair of swing blades by the collision of the fluid with the yield lift force generating face of the swing blade, while the lift force to the erect posture is generated in the other of the pair of swing blades by the collision of the fluid with the erect lift force generating face of the swing blade;
wherein in the swing blade in the yield posture, the erect lift force generating face is disposed near the coupling mechanism, closer than the yield lift force generating face;
and when a second flow vector is defined as a flow vector of the fluid flowing from the side of the tip portion toward the side of the blade shaft of the swing blade in the yield posture, an angle formed between the second flow vector and a normal vector of the erect lift force generating face decreases from the side of the blade shaft toward the side of the tip portion, in either case where the swing blade is in the yield posture or the erect posture.
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JP2013035253A JP5400976B1 (en) 2013-02-26 2013-02-26 Turbine mechanism
JP2013-035253 2013-02-26
PCT/JP2014/053792 WO2014132842A1 (en) 2013-02-26 2014-02-18 Turbine mechanism

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CA2940584A1 CA2940584A1 (en) 2014-09-04
CA2940584C true CA2940584C (en) 2018-07-17

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PH (1) PH12015501879A1 (en)
WO (1) WO2014132842A1 (en)

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FR3052815B1 (en) * 2016-06-17 2021-04-30 Robert Belli TURBINE WITH RETRACTABLE BLADES
WO2024095505A1 (en) * 2022-11-04 2024-05-10 道夫 平井 Wind power generation device

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JPS53131150U (en) * 1978-03-09 1978-10-18
GB0601185D0 (en) * 2006-01-20 2006-03-01 Intellitect Water Ltd Flow sensitive stirrer/generator for low power measurement systems
JP2009275641A (en) * 2008-05-16 2009-11-26 Kankyo Kagaku Kenkyusho:Kk Stream surface parallel rotation windmill (water turbine)

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JP5400976B1 (en) 2014-01-29
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PH12015501879B1 (en) 2016-01-11
CA2940584A1 (en) 2014-09-04
PH12015501879A1 (en) 2016-01-11

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