WO2020161819A1 - Redresseur - Google Patents

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Publication number
WO2020161819A1
WO2020161819A1 PCT/JP2019/004207 JP2019004207W WO2020161819A1 WO 2020161819 A1 WO2020161819 A1 WO 2020161819A1 JP 2019004207 W JP2019004207 W JP 2019004207W WO 2020161819 A1 WO2020161819 A1 WO 2020161819A1
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WO
WIPO (PCT)
Prior art keywords
resistance
fluid
flow
frame
suppressor
Prior art date
Application number
PCT/JP2019/004207
Other languages
English (en)
Japanese (ja)
Inventor
泰孝 和田
博昭 谷川
優 大内
Original Assignee
中国電力株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 中国電力株式会社 filed Critical 中国電力株式会社
Priority to JP2019532166A priority Critical patent/JP6624350B1/ja
Priority to PCT/JP2019/004207 priority patent/WO2020161819A1/fr
Publication of WO2020161819A1 publication Critical patent/WO2020161819A1/fr

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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
    • F03B—MACHINES OR ENGINES FOR LIQUIDS
    • F03B13/00—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates
    • F03B13/12—Adaptations 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
    • F03B13/26—Adaptations 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
    • 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
    • F03B—MACHINES OR ENGINES FOR LIQUIDS
    • F03B3/00—Machines or engines of reaction type; Parts or details peculiar thereto
    • F03B3/16—Stators
    • F03B3/18—Stator blades; Guide conduits or vanes, e.g. adjustable
    • 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 
    • F03D3/02—Wind motors with rotation axis substantially perpendicular to the air flow entering the rotor  having a plurality of 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 
    • F03D3/04—Wind motors with rotation axis substantially perpendicular to the air flow entering the rotor  having stationary wind-guiding means, e.g. with shrouds or channels
    • 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
    • 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
    • Y02E10/20—Hydro energy
    • 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
    • Y02E10/30—Energy from the sea, e.g. using wave energy or salinity gradient
    • 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 rectifying device.
  • the energy of fluid such as wind and tidal current is used to generate rotational force to generate power.
  • a vertical axis type rotating device such as a Darrieus type in which a rotation axis is provided perpendicular to a fluid is generally used.
  • the vertical shaft type rotating device is provided with a blade for receiving a fluid at the tip of an arm extending radially from the rotating shaft. Therefore, the vertical shaft type rotating device is provided with a blade having a shape that efficiently generates a lift force in order to efficiently transmit the rotating force from the fluid to the rotating shaft (for example, Patent Document 1).
  • the frame manufacturing cost may increase, the frame weight may increase, the transportation cost may increase, and the frame installing cost may increase.
  • the main invention for solving the above-mentioned problems is a rotating device which is attached to a rotating shaft and includes a blade for receiving a fluid flow to rotate the rotating shaft, wherein the rotating device is rotatably supported by the rotating shaft. It is characterized by comprising a resistance suppressing body that rotates along the flow of the fluid so as to suppress the resistance given to the rotating shaft due to the fluid flowing from the upstream side of the shaft.
  • the present invention it is possible to suppress the turbulence of the flow of the fluid and the generation of vortices such as Karman vortices that occur in the region on the downstream side of the rotation axis of the rotating device placed in the fluid.
  • the power generation efficiency can be improved.
  • the frame even in a situation in which the frame is provided so as to surround the rotating device, it is possible to suppress the occurrence of turbulence of the flow and vortices such as the Karman vortex that occur in the region on the downstream side of the frame.
  • the viscous pressure resistance generated in the frame can be suppressed.
  • the frame can be manufactured with low strength, so that the manufacturing cost of the frame can be reduced.
  • the weight of the frame can be reduced and the method of fixing the frame to the harbor structure can be simplified, the installation cost of the frame can be reduced.
  • the flow turbulence can be suppressed by rectifying the flow of the fluid, the power generation efficiency can be improved.
  • the frame can be manufactured with low strength, so that the manufacturing cost of the frame can be reduced. Further, since the weight of the frame can be reduced and the method of fixing the frame to the harbor structure can be simplified, the installation cost of the frame can be reduced. Further, since the flow turbulence can be suppressed by rectifying the flow of the fluid, the power generation efficiency can be improved.
  • FIG. 1 It is a top view which shows an example which looked at the frame resistance suppression body arrange
  • FIG. 3 is a plan view showing an example of a flow turbulence and a Karman vortex generation situation occurring in the rotation axis of a vertical axis type rotating device, as viewed from the +Y direction.
  • FIG. 6 is a perspective view showing a state of flow turbulence and Karman vortex generation occurring on a rotation axis of a vertical axis type rotating device.
  • FIG. 6 is a perspective view showing a turbulence of a flow, a Karman vortex, or a wave generated in a frame surrounding a vertical-axis type rotating device. It is a block diagram which shows an example of a power generation device.
  • the Y axis is the direction along the rotation axis 100A
  • the X axis and the Z axis are axes that intersect perpendicularly to the Y axis.
  • FIGS. 1 to 19 the same members will be described with the same numerals.
  • the side in the fluid flow direction may be referred to as “downstream side”, and the side in the fluid flow direction may be referred to as “upstream side”.
  • the direction along the X axis may be referred to as “X direction”
  • the direction along the Y axis may be referred to as “Y direction”
  • the direction along the Z axis may be referred to as “Z direction”.
  • the + side may be indicated by “+”
  • the ⁇ side may be indicated by “ ⁇ ”.
  • a section of the rectifying device which is sectioned by a plane including the X axis and the Z axis may be referred to as an “XZ section”.
  • FIG. 14 is a perspective view showing an example of a vertical axis type rotating device 200.
  • FIG. 15 is a perspective view showing an example in which the frame 130 is provided in the vertical axis type rotation device 200.
  • FIG. 19 is a configuration diagram showing an example of the power generation device 1000.
  • the rotating device 200 is a device that transmits a rotational force to the speed increasing gear 300 of the power generating device 1000 via the rotating shaft 100, for example.
  • the speed increaser 300 is a device that increases the rotation speed of the rotating shaft 100 and transmits it to the generator 400.
  • the power generation device 1000 is, for example, a wind power generation device or a hydraulic power generation device.
  • the wind power generation device is a power generation device that uses wind pressure energy generated by the wind
  • the hydraulic power generation device uses water pressure energy generated by a water flow to rotate a turbine to generate electricity.
  • the rotating device 200 in which the rectifying device according to the present embodiment is arranged refers to, for example, a rotating device of a vertical axis type power generating device such as a Darrieus type. Note that the present embodiment will be described by using a tidal current power generator as an example of the hydraulic power generators, but the present embodiment can be similarly applied to other hydraulic power generators and wind turbine generators.
  • the rotating device 200 of the tidal current power generator is configured to include a rotating shaft 100 and a blade 120.
  • a rotating shaft 100 For example, one end of the rotary shaft 100 in the X direction is connected to the speed increaser 300.
  • the rotating shaft 100 transmits the rotational force to the speed increaser 300.
  • the rotating shaft 100 rotates, for example, in a clockwise direction (hereinafter, referred to as “rotating direction”) when the blade 120 described below is viewed from the +Y direction.
  • rotating direction a clockwise direction
  • the blade 120 is a member that obtains a lift force in the rotation direction by the flow of fluid.
  • the blade 120 is rotating around the rotating shaft 100.
  • the blade 120 is configured to include an arm 110 provided on the +Y direction side of the blade 120 and an arm 111 provided on the ⁇ Y direction side.
  • the main body of the blade 120 transmits the lift force in the rotation direction to the rotation shaft 100 as the rotation force in the rotation direction via the arms (110, 111).
  • the arms (110, 111) are, for example, radially extended from the rotary shaft 100, and the ends on the opposite side of the rotary shaft 100 are connected to the blade 120.
  • the rotating device 200 of the tidal power generator is fixed to the frame 130 underwater.
  • the frame member 131 is fixed to a concrete structure such as a gulf structure or a pier foundation.
  • the frame 130 may be fixed on a foundation such as concrete installed on the sea floor, or may be fixed on a floating body installed on the sea surface.
  • the frame 130 supports the rotating shaft 100 via bearings (140A, 140B) so that the rotating shaft 100 can rotate, for example.
  • the rotating device 200 is described as a vertical shaft type, but for example, the rotating device 200 in which the rotating shaft 100 is provided horizontally (for example, in the Z direction) or the rotating device 200 provided obliquely with respect to the horizontal.
  • the manner in which the rotary shaft 100 is installed is not limited.
  • the blade 120 of the rotating device 200 may have a curved portion, and may be directly attached to the rotating shaft 100 without using the arms (110, 111).
  • the rotary device 100 in which the rotary shaft 100 is provided vertically (Y direction) will be described.
  • FIG. 16 is a plan view showing an example of the flow turbulence and the Karman vortex generation situation occurring on the rotating shaft 100 of the vertical shaft type rotating device 200 as viewed from the +Y direction.
  • FIG. 17 is a perspective view showing a state of flow turbulence and Karman vortex generation occurring on the rotating shaft 100 of the vertical shaft type rotating device 200.
  • FIG. 18 is a perspective view showing a turbulence of a flow, a Karman vortex, or a wave generated in a frame surrounding a vertical axis type rotating device.
  • a fluid such as wind or water flows from the ⁇ X direction toward the +X direction.
  • the flow turbulence and vortex of the rotating shaft 100 shows the flow turbulence and vortex of the rotating shaft 100, the flow turbulence and vortex also occur in the frame 130.
  • the turbulence of the flow is turbulence due to a change in the direction of the flow or separation of the fluid caused by an effect such as the shape of an object placed in the fluid.
  • the vortex is a vortex that occurs alternately on the downstream side (the +X direction side) of the obstacle when the obstacle is arranged in the fluid.
  • the above-described flow of the flow is provided on the downstream side of the frame member 131 provided in parallel (Y direction) and the frame member 132 provided vertically (Z direction) with respect to the rotating shaft 100.
  • Vortex resistance occurs due to turbulence and vortices.
  • waves are generated due to turbulence of the flow and vortices.
  • wave-making resistance due to waves is generated in the frame members (131, 132).
  • the flow turbulence and the vortex are generated when the fluid reaches the rotary shaft 100 from the upstream side of the rotary shaft 100 and the fluid flows downstream along the circumferential surface of the rotary shaft 100. It occurs in the area downstream of 100.
  • the turbulence or vortex of the flow reaches the blade 120 rotating around the rotating shaft 100 on the downstream side of the rotating shaft 100.
  • the tidal current around the blade 120 is disturbed, which hinders its rotation.
  • the flow of the fluid is disturbed due to the influence of the waves generated by the rotating shaft 100 and the frame 130, and the rotation of the blade 120 is hindered.
  • the flow turbulence and the vortex are such that the fluid reaches the frame members (131, 132) from the upstream side of the frame 130, and the fluid reaches the downstream side along the peripheral surface of the frame member (131, 132). Occurs in the region on the downstream side of the frame members (131, 132) when flowing to the.
  • the turbulence or vortex of the flow reaches the blade 120 rotating around the rotating shaft 100 on the downstream side of the frame member (131, 132), and the blade 120 disturbs the tidal current around the blade 120 to hinder the rotation.
  • the rotation of the blade 120 is hindered because the fluid flow is disturbed by the influence of the waves generated by the frame members (131, 132).
  • the turbulence or vortex of the flow disturbs the flow around the blade 120 and reduces the efficiency with which the blade 120 converts the kinetic energy of the fluid into the rotational power of the shaft. , 30).
  • the rectifying device (10, 20, 30) will be described in detail.
  • FIG. 1 is a perspective view showing an example of a rectifying device 10 according to the first embodiment.
  • FIG. 2 is a perspective view showing an enlarged example of the rectifying device 10 according to the first embodiment.
  • FIG. 3 is a plan view showing an example of the rectifying device 10 according to the first embodiment viewed from the +Y direction.
  • FIG. 4 is a plan view showing an example of a situation where the rectifying device 10 according to the first embodiment is rotated, viewed from the +Y direction.
  • the rectifying device 10 is a device that suppresses turbulence and vortex of the flow generated on the downstream side of the rotating shaft 100 arranged in the fluid. Further, the rectifying device 10 can suppress the generation of waves near the water surface.
  • the rectifying device 10 is not only used for the rotating shaft 100 in the present embodiment, but in a situation where a fluid flows in the X direction, for example, an object provided in the fluid in the substantially Y direction or the substantially Z direction is used. It can also be applied to.
  • the rectification device 10 is a device that suppresses turbulence and vortex of the flow generated on the downstream side of the rotating shaft 100 by rotating a resistance suppressing body 11 described later along a direction in which a fluid flows. ..
  • the rectifying device 10 is configured such that a resistance suppressing body 11 is rotatably supported by a rotating shaft 100 via a bearing 12 described later.
  • the rectifying device 10 is arranged between the +Y-direction side arm 110 and the ⁇ Y-direction side arm 111 that extend on the rotating shaft 100. As a result, as shown in FIG.
  • the rectifying device 10 can suppress the turbulence and vortex of the flow generated on the downstream side of the rotary shaft 100 between the arm 110 on the +Y direction side and the arm 111 on the ⁇ Y direction side.
  • the rectifying device 10 may be installed between the bearing 140A and the arm 110, between the arm 111 and the bearing 140B, or on the ⁇ Y direction side of the bearing 140B in the rotating shaft 100. good.
  • the resistance suppressor 11 may be installed on the rotating shaft 100 near the water surface. Accordingly, the rectifying device 10 can suppress the generation of waves generated on the water surface on the downstream side of the rotating shaft 100.
  • the rectifying device 10 is configured to include, for example, a resistance suppressor 11 and a bearing 12.
  • a resistance suppressor 11 and a bearing 12.
  • the resistance suppressor 11 and the bearing 12 will be described in detail.
  • the resistance suppressor 11 is a member that suppresses flow turbulence and vortex on the downstream side of the rotating shaft 100.
  • the resistance suppressor 11 is provided on the rotating shaft 100 via a bearing 12 described below.
  • the resistance suppressor 11 is made of, for example, a stainless material, and as shown in FIG. 3, is formed so that the thickness in the Z direction becomes thinner from the rotary shaft 100 toward the downstream side.
  • the width in the Z direction is called the blade thickness, and the length in the X direction is called the chord length.
  • the resistance suppressor 11 has a blade thickness that is not damaged by a force generated by rotation.
  • the resistance suppressor 11 has a chord length that does not contact the blade 120 when the resistance suppressor 11 is arranged on the rotating shaft 100.
  • the resistance suppressor 11 has a blade thickness that increases from one end in the -X direction (a leading edge described below) to the rotating shaft 100 and that decreases from the rotating shaft 100 to the other end in the +X direction (a trailing edge described below). Is formed in.
  • the XZ section has a streamlined shape.
  • the streamlined shape refers to a shape in which one end on the upstream side ( ⁇ X direction side) is rounded and the other end on the downstream side (+X direction side) is sharp in the state where the resistance suppressor 11 is along the flow direction.
  • the resistance suppressor 11 is formed symmetrically in the Z direction about the X direction (chordline described later).
  • the resistance suppressor 11 is continuously provided, for example, seamlessly from below the joint of the arm 110 on the +Y direction side of the rotating shaft 100 to above the joint of the arm 111 on the ⁇ Y direction side. .. Since the resistance suppressor 11 has a symmetrical streamline shape, the resistance received from the fluid passing from one end to the other end can be reduced, and thus the flow turbulence and vortex can be suppressed. In addition, the generation of waves can be suppressed near the water surface.
  • one end of the resistance suppressor 11 in the ⁇ X direction is the leading edge
  • the other end of the +X direction is the trailing edge
  • the leading edge and the trailing edge are
  • the phantom line connecting the straight lines is shown as the chord line.
  • the resistance suppressor 11 is arranged so that the center line of the rotating shaft 100 and the chord line intersect.
  • the resistance suppressor 11 is arranged so that the aerodynamic center is located on the downstream side (+X direction side) of the rotating shaft 100. Thereby, as shown in FIG. 4, the resistance suppressor 11 can swivel quickly so that the chord line follows the fluid flow when the fluid flow changes.
  • the bearing 12 is provided so as to be interposed between the rotating shaft 100 and the resistance suppressor 11.
  • the bearing 12 is a member that suppresses friction of the rotation shaft 100 on the resistance suppression body 11 when the resistance suppression body 11 rotates on the peripheral surface of the rotation shaft 100. That is, the bearing 12 is a member that suppresses energy loss and heat generation that occur in the resistance suppressor 11 and the rotating shaft 100.
  • the bearing 12 is a ball bearing made of, for example, a stainless material.
  • the bearing 12 is provided at least at one end in the +Y direction and at the other end in the ⁇ Y direction of the resistance suppressor 11 so that the resistance suppressor 11 can rotate without contacting the rotating shaft 100, for example.
  • the bearing 12 is preferably provided with, for example, a thrust collar so that the resistance suppressor 11 does not move in the Y direction with respect to the rotating shaft 100.
  • the leading edge is arranged in the ⁇ X direction and the trailing edge is in the +X direction when the fluid is flowing from the ⁇ X direction to the +X direction.
  • Rotate to be placed in That is, the resistance suppressor 11 rotates so that its chord line is along the direction of fluid flow. Since the resistance suppressor 11 has a streamlined shape, turbulence and vortices of the flow are suppressed on the +X direction side. In addition, the generation of waves can be suppressed near the water surface.
  • the resistance suppressor 11 rotates so that when the fluid flow is tilted in the ⁇ Z direction with respect to the X direction, the leading edge is arranged in the fluid flow direction. Move. That is, the resistance suppressor 11 rotates so that its chord line is along the direction of fluid flow. Specifically, the chord line of the resistance suppressor 11 shown by the solid line rotates along the flow direction of the fluid shown by the broken line to become the resistance suppressor 11 shown by the broken line.
  • FIG. 5 is a perspective view showing an enlarged example of the rectifying device 20 according to the second embodiment.
  • FIG. 6 is a plan view showing an example of the rectifying device 20 according to the second embodiment viewed from the +Y direction.
  • FIG. 7: is a perspective view which shows an example which provided the collar part in the resistance suppression body 21 of the rectifier 20 which concerns on 2nd Embodiment.
  • FIG. 8 is a perspective view showing an example of a variation of the resistance suppressor 21 of the rectifying device 20 according to the second embodiment. Note that the parts not shown in FIGS. 5 to 8 are the same as those in FIG.
  • the rectifying device 20 according to the second embodiment is a device that suppresses the turbulence and vortex of the flow generated on the downstream side of the rotating shaft 100 by rotating the resistance suppressing body 21 described later along the flow direction of the fluid. .. In addition, the generation of waves can be suppressed near the water surface.
  • the resistance suppressor 21 of the rectifying device 20 is rotatably supported by the rotating shaft 100 via the bearing 22, so that friction in the rotating direction is indirectly generated from the rotating shaft 100 via the bearing 22. It receives a force (hereinafter referred to as "rotational friction force"). Due to the rotational frictional force, the rectifying device 20 is tilted in the rotating direction to some extent. Therefore, the rectifying device 20 according to the second embodiment is configured to correct the inclination of the resistance suppressor 21 in a shape that takes into consideration the rotational frictional force.
  • the rectifying device 20 is arranged between the arm 110 on the +Y direction side and the arm 111 on the ⁇ Y direction side, which are provided on the rotary shaft 100. As a result, the rectifying device 20 can suppress the turbulence and vortex of the flow generated on the downstream side of the rotating shaft 100 between the arm 110 on the +Y direction side and the arm 111 on the ⁇ Y direction side. In addition, the generation of waves can be suppressed near the water surface.
  • the rectifier 20 is configured to include, for example, a resistance suppressor 21 and a bearing 22. Since the bearing 22 is the same as the bearing 12 of the rectifying device 10 according to the first embodiment, the description thereof will be omitted.
  • the resistance suppressor 21 is a member that suppresses turbulence and vortex of the flow on the downstream side of the rotating shaft 100. It is a member that suppresses the generation of waves near the water surface.
  • the resistance suppressor 21 is provided on the rotating shaft 100 via a bearing 22.
  • the resistance suppressor 21 is made of, for example, a stainless material, and is formed so that the thickness in the Z direction becomes thinner from the rotary shaft 100 toward the downstream side.
  • the shape of the resistance suppressor 21 will be specifically described as follows.
  • the width in the Z direction is called the blade thickness
  • the length in the X direction is called the chord length.
  • the resistance suppressor 21 has a blade thickness that is not damaged by a force generated by rotation.
  • the resistance suppressor 21 has a chord length that does not contact the blade 120 when the resistance suppressor 21 is arranged on the rotating shaft 100.
  • the resistance suppressor 21 has a blade thickness that increases from one end in the -X direction (a leading edge described below) to the rotating shaft 100, and that decreases from the rotating shaft 100 to the other end in the +X direction (a trailing edge described below). Is formed in.
  • the XZ section has a wing shape.
  • the wing shape is a shape in which one end on the upstream side (-X direction side) is rounded and the other end on the downstream side (+X direction side) is sharp in the state where the resistance suppressor 21 is along the flow direction. Further, in the airfoil, the peripheral surface on the ⁇ Z direction side is rounded with respect to the X axis as compared to the peripheral surface on the +Z direction side. That is, the resistance suppressor 21 is formed asymmetrically in the Z direction with the X direction (the chord line described later) as the center.
  • the airfoil is, for example, NACA63A016 defined by the predecessor NACA of NASA.
  • the flow velocity in the ⁇ Z direction side is faster than the flow velocity in the +Z direction side of the resistance suppressor 21, so the pressure in the ⁇ Z direction side becomes smaller than the pressure in the +Z direction side, and the lift force becomes ⁇ Z. Occurs towards the direction. That is, the resistance suppressor 21 is formed such that the rotational frictional force and the lift force are equal to each other in order to suppress the turbulence and vortex of the flow.
  • the resistance suppressor 21 rotates in the ⁇ Z direction side due to lift force or the like to cause a state in which the fluid flow is blocked, the lift angle decreases because the angle of attack of the resistance suppressor 21 decreases. In this case, the resistance suppressor 21 blocks the flow of the fluid, so that the pressure on the circumferential surface of the resistance suppressor 21 on the ⁇ Z direction side increases. Therefore, the resistance suppressor 21 does not rotate at a certain angle or more with respect to the flow direction, and therefore turbulence or vortex of the flow is not generated on the downstream side of the resistance suppressor 21.
  • the resistance suppressor 21 rotates in the +Z direction side due to a rotational frictional force and a state of blocking the flow is generated, the angle of attack of the resistance suppressor 21 increases, so that the lift force increases. In this case, the resistance suppressor 21 blocks the flow of the fluid, so that the pressure on the circumferential surface of the resistance suppressor 21 on the +Z direction side increases. Therefore, the resistance suppressor 21 does not rotate at a certain angle or more with respect to the flow direction, and therefore turbulence or vortex of the flow is not generated on the downstream side of the resistance suppressor 21.
  • the resistance suppressor 21 is continuously provided, for example, without a break from below the joint of the arm 110 on the +Y direction side of the rotary shaft 100 to above the joint of the arm 111 on the ⁇ Y direction side. ..
  • one end of the resistance suppressor 21 in the ⁇ X direction is a leading edge
  • the other end in the +X direction is a trailing edge
  • the leading edge and the trailing edge are A phantom line connecting a straight line
  • a phantom line indicating the middle of the distance along the Z axis between the ⁇ Z side peripheral surface and the +Z side peripheral surface is shown as the intermediate line. ..
  • the resistance suppressor 21 is arranged so that the center line of the rotating shaft 100 and the chord line intersect.
  • the resistance suppressor 21 is arranged so that the aerodynamic center is located on the downstream side (+X direction side) of the rotating shaft 100. Accordingly, the resistance suppressor 21 can rotate so that the chord line follows the fluid flow when the fluid flow changes. At this time, as described above, the lifting force and the rotational friction force are rotated so as to be equal to each other.
  • the resistance suppressor 21 may be provided with flange portions (21A, 21B) in order to suppress the resistance due to the vortex generated at both ends.
  • the flange portions (21A, 21B) are configured by, for example, a first flange portion 21A on the +Y direction side and a second flange portion 21B on the ⁇ Y direction side.
  • the flange portions (21A, 21B) are provided at both ends of the resistance suppressing body 21 in the Y direction in a flange shape with respect to the resistance suppressing body 21.
  • the resistance suppressor 21 has been described so that the XZ section has a wing shape, but the present invention is not limited to this.
  • the end surface on the +Y direction side is formed symmetrically in the Z direction with the X direction as the center (first resistance suppressor), and the intermediate portion in the Y direction is centered in the X direction.
  • both end faces of the resistance suppressor 21 in the Y direction are formed symmetrically, it is possible to suppress the generation of blade tip vortices without causing a flow in the Z direction at both end faces, and to suppress the induced resistance. Further, since the resistance suppressing body 21C has an asymmetrical intermediate portion, it can be rotated so that the rotational friction force and the lift force are balanced.
  • the leading edge is arranged in the ⁇ X direction and the trailing edge is in the +X direction when the fluid is flowing from the ⁇ X direction to the +X direction.
  • Rotate to be placed in Furthermore, the rotation is performed so that the lift force and the rotational friction force become equal. That is, the resistance suppressor 21 rotates so that its chord line is along the direction of fluid flow. Since the resistance suppressor 21 has a wing shape, turbulence and vortex of the flow are suppressed on the +X direction side thereof.
  • the generation of waves can be suppressed near the water surface. Note that, when the flow of the fluid changes, the resistance suppressor 21 moves in the same manner as the resistance suppressor 11 according to the first embodiment, and therefore its description is omitted.
  • FIG. 9 is a perspective view showing an example of the rectifying device 30 according to the third embodiment.
  • FIG. 10 is a perspective view showing an enlarged example of the frame resistance suppressing body 33 of the rectifying device 30 according to the third embodiment.
  • FIG. 11 is a plan view showing an example of the frame resistance suppressing body 33B arranged on the frame member 132 provided horizontally of the rectifying device 30 according to the third embodiment as viewed from the +Z direction.
  • the rectifying device 30 is a device that suppresses turbulence and vortex of the flow generated on the downstream side of the rotating shaft 100 and the frame 130 arranged in the fluid. In addition, the generation of waves can be suppressed near the water surface.
  • the rectifying device 30 is not used only for the rotating shaft 100 and the frame 130, but is also applied to an object provided in the fluid in the substantially Y direction or the substantially Z direction in a situation where the fluid flows in the X direction. it can.
  • the rectifying device 30 according to the third embodiment is configured by adding a frame resistance suppressing body 33 described below to the rectifying device (10, 20) according to the first embodiment or the second embodiment.
  • the resistance suppressor 31 and a frame resistance suppressor 33 which will be described later, rotate in the fluid flow direction to suppress flow turbulence and vortices generated on the downstream side of the rotating shaft 100 and the frame 130. It is a device.
  • the generation of waves can be suppressed near the water surface.
  • the frame 130 is provided, for example, with a frame member 131 provided along the Y direction with respect to the flow of the fluid, and along a Z direction with respect to the fluid flow.
  • the frame member 132 provided is included. Further, a description will be given below with a provisional line passing through the centers of the frame members 131 and 132 as a center line.
  • the frame resistance suppressor 33 is a member that suppresses turbulence and vortex of the flow on the downstream side of the frame member 131 and the frame member 132.
  • the frame resistance suppressing body 33 includes a frame resistance suppressing body 33A arranged on the frame member 131 and a frame resistance suppressing body 33B arranged on the frame member 132.
  • the frame resistance suppressor 33 is provided on the frame member 131 and the frame member 132 via the bearing 32.
  • the frame resistance suppressing body 33 is made of, for example, a stainless material, and is formed such that the thickness in the Z direction becomes thinner from the frame member 131 and the frame member 132 toward the downstream side.
  • the shapes of the frame resistance suppression body 11A and the frame resistance suppression body 11B will be specifically described as follows.
  • the frame resistance suppressor 33A according to the third embodiment has a shape similar to the resistance suppressor 11 according to the first embodiment. Therefore, the leading edge, the trailing edge, the chord line, and the aerodynamic center of the frame resistance suppression body 33A according to the third embodiment are as shown in FIG.
  • the width in the Z direction is called the blade thickness
  • the length in the X direction is called the chord length.
  • the frame resistance suppressing body 33A has a blade thickness that is not damaged by a force generated by rotation.
  • the frame resistance suppressing member 33A has a chord length that does not contact the blade 120 when it is arranged on the frame member 131.
  • the frame resistance suppressing member 33A is formed such that the blade thickness increases from the front edge to the frame member 131 and decreases from the frame member 131 to the trailing edge.
  • the XZ section has a streamlined shape.
  • the frame resistance suppressor 33A is formed symmetrically in the Z direction about the chord line.
  • the frame resistance suppressing body 33A is continuously provided, for example, without a break, over both ends of the frame member 131 in the long axis direction (Y direction). Since the frame resistance suppressing body 33A has a symmetrical streamlined shape, the resistance received from the fluid passing from the leading edge to the trailing edge can be reduced, so that flow turbulence and vortex can be suppressed. In addition, the generation of waves can be suppressed near the water surface.
  • the frame resistance suppressing body 33A is arranged so that the center line of the frame member 131 and the chord line intersect.
  • the frame resistance suppressing body 33A is arranged so that the aerodynamic center is located on the downstream side (+X direction) of the frame member 131. As a result, the frame resistance suppressing member 33A can rotate so that the chord line follows the fluid flow when the fluid flow changes.
  • the frame resistance suppressing body 33B may have the same shape as the frame resistance suppressing body 33A described above. However, since the frame resistance suppressing body 33B is arranged on the frame member 132 provided perpendicularly to the rotating shaft 100, it receives a force in the ⁇ Y direction due to gravity and a force in the +Y direction due to buoyancy and lift from the fluid. Therefore, in the frame resistance suppressing body 33B, as a more preferable shape, as shown in FIG. 11, a fluid passing through the axis of the frame member 132 such that the resultant force of buoyancy and lift and the gravity cancel each other out. It is formed asymmetrically with respect to the direction of flow. More specifically, the XY cross section exhibits a wing shape.
  • the operation of the rectifying device 30 will be described with reference to FIG. 10.
  • the resistance suppressor 31 of the rectifying device 30 according to the third embodiment is the same as the resistance suppressors (11, 21) of the rectifying devices (10, 20) according to the first and second embodiments. , The description is omitted.
  • the frame resistance suppressing body 33 of the rectifying device 30 will be described.
  • the leading edge is arranged in the ⁇ X direction and the trailing edge is +X in the state where the fluid flows from the ⁇ X direction to the +X direction.
  • the frame resistance suppression body 33 rotates so that the front edge is arranged in the direction in which the fluid flows when the fluid flow is tilted in the ⁇ Z direction with respect to the X direction. That is, the frame resistance suppression body 33 rotates so that the chord line thereof is along the direction of fluid flow.
  • the resistance suppressors (11, 21, 31) are described as exhibiting a streamlined shape or a wing shape, but the invention is not limited thereto.
  • it may be rotatably supported by the rotary shaft 100, and a flat plate-shaped member may extend from the rotary shaft 100.
  • the rotary shaft 100 may be rotatably supported by the rotary shaft 100, and may have a triangular shape whose width becomes narrower as it goes downstream from the rotary shaft 100.
  • the resistance suppressor (11, 21, 31) is, for example, a cut from below the joint of the arm 110 on the +Y direction side of the rotating shaft 100 to above the joint of the arm 111 on the ⁇ Y direction side.
  • the present invention is not limited to this.
  • a plurality of resistance suppressors (11, 21, 31) may be provided intermittently.
  • the resistance suppressors (11, 21) are illustrated so as to cover the peripheral surface of the rotating shaft 100 via the bearings (12, 22), but the invention is not limited thereto.
  • the resistance suppressors 41 and 51 are partially attached to the bearings 42 and 52 provided on the rotary shaft 100, and the blade thickness becomes thinner as the distance from the rotary shaft 100 increases.
  • they may be formed symmetrically with respect to the direction of the fluid flow passing through the rotating shaft 100.
  • the resistance suppressor 41 shown in FIG. 12 is concavely curved so that its upstream side ( ⁇ X direction side) end extends along the peripheral surface of the rotating shaft 100.
  • the resistance suppressor 51 shown in FIG. 13 has a rounded convex end.
  • the resistance suppressors 41 and 51 are attached at their ends to the bearings 42 and 52 so as to rotate in the direction of the fluid flow.
  • the resistance suppressors (41, 51) may be formed asymmetrically with respect to the direction of the flow of the fluid passing through the rotating shaft 100.
  • the rectifying device (10, 20, 30) is described as including the bearings (12, 22, 32), but the present invention is not limited thereto.
  • the rectifier (10, 20, 30) may not be provided with the bearings (12, 22, 32), and the resistance suppressors (11, 21, 31) are suppressed from moving in the long axis direction, In addition, it may be provided so as to be rotatable.
  • the frame resistance suppressor 33 is described as a streamlined type, but is not limited to this.
  • it may be rotatably supported by the frame member 131, and a flat plate-shaped member may extend from the frame member 131.
  • it may be rotatably supported by the frame member 131 and may have a triangular shape whose width becomes narrower as it goes downstream from the frame member 131.
  • the frame resistance suppressing body 33 is described as being continuously provided over both ends of the frame member 131 in the long axis direction (Y direction), for example, but is not limited thereto.
  • a plurality of frame resistance suppressing bodies 33 may be provided intermittently.
  • both ends of the frame resistance suppressing body 33 and other frame members different from the frame member 131 on which the frame resistance suppressing body 33 is pivotally supported may be provided so as to be sufficiently separated from each other. ..
  • the frame resistance suppressing body 33 may be provided at the center of the frame member 131 in the Y direction so as to be sufficiently separated from both ends of the frame member 131.
  • the bearing 32 is not limited to being attached, and it is sufficient that the frame resistance suppressing body 33 is provided so as to be restrained from moving in the long axis direction and rotatable.
  • the rectification device (10, 20, 30) is configured to include the blade 120 that is attached to the rotating shaft 100 and that receives the flow of fluid and rotates the rotating shaft 100.
  • the fluid is rotatably supported by the rotating shaft 100 and is rotated along the flow of the fluid so as to suppress the resistance given to the rotating shaft 100 due to the fluid flowing from the upstream side of the rotating shaft 100.
  • a moving resistance suppressor (11, 21, 31) is provided. According to the present embodiment, the flow turbulence, the vortex, and the generation of waves near the water surface can be suppressed, so that the flow turbulence and the vortex around the blade 120 are reduced and the power conversion efficiency is improved.
  • the resistance suppressing bodies (11, 21, 31) are pivotally supported by the rotary shaft 100 so as to cover the rotary shaft 100. According to the present embodiment, the flow turbulence in the fluid reaching the rotating shaft 100 and the generation of waves near the vortex water surface can be suppressed, so that the flow turbulence and vortices around the blade 120 are reduced and the power conversion efficiency is improved. To do.
  • the resistance suppressor (41, 51) is pivotally supported by the rotary shaft 100 so as to be adjacent to the rotary shaft 100.
  • the resistance suppressor (41, 51) can be downsized as compared with the resistance suppressor (11, 21, 31), so that the manufacturing cost can be reduced.
  • the resistance suppressor 11 is formed symmetrically with the direction of the fluid flow passing through the rotating shaft 100 as a boundary. According to the present embodiment, the turbulence and vortex of the flow can be efficiently suppressed on the downstream side of the rotating shaft 100. Further, if the rotary shaft 100 near the water surface is provided with the resistance suppressor (11, 31), generation of waves can be suppressed.
  • the resistance suppressor 21 includes a rotational frictional force transmitted to the resistance suppressor 21 and a lift force in a direction opposite to the rotation direction that the resistance suppressor 21 receives from the fluid. So as to cancel each other, they are formed asymmetrically with respect to the flow direction of the fluid passing through the rotating shaft 100. According to the present embodiment, since the rotational frictional force and the lift force cancel each other, the resistance suppressor 21 can be arranged along the flow direction of the fluid, so that the turbulence and vortex of the flow can be suppressed more efficiently. In addition, the generation of waves can be suppressed near the water surface.
  • the resistance suppressor 21 is provided on the first end face in the +Y direction in the direction along the rotation axis 100 so as to suppress vortices generated from both ends of the resistance suppressor 21. It further includes a first flange portion 21A having a flange shape and a second flange portion 21B having a flange shape provided on a second end surface opposite to the first end surface in the direction along the rotating shaft 100. According to the present embodiment, it is possible to suppress the induced resistance due to the blade tip vortex occurring at both ends of the resistance suppressor 21.
  • both ends of the resistance suppressor 21C in the direction along the rotation axis 100 are formed symmetrically with respect to the direction of the fluid flow passing through the rotation axis 100.
  • the induced friction is suppressed at both ends of the resistance suppressor 21C in the Y direction without generating a blade tip vortex, and the rotational friction force and the lift force cancel each other in the middle part, so that the flow efficiency is improved. Disturbances and vortices can be suppressed.
  • the resistance suppressor (11, 21, 31) moves from the upstream side to the downstream side of the fluid in a state of being rotated along the flow direction of the fluid. It is formed so that the thickness in the direction along the rotation axis 100 and the direction (Z direction) orthogonal to the direction of fluid flow becomes thinner as it goes. According to the present embodiment, the turbulence and vortex of the flow can be efficiently suppressed on the downstream side of the rotating shaft 100. In addition, the generation of waves can be suppressed near the water surface.
  • the frame member (131, 132) constituting the frame 130 is pivotally supported and is upstream of the frame member (131, 132).
  • a frame resistance suppressing body 33 that rotates along the flow of the fluid so as to suppress the resistance given to the frame members (131, 132) due to the fluid flowing from the side.
  • the frame resistance suppressing body 33 has a combined force of a buoyancy generated in the frame resistance suppressing body 33 and a lift force received by the frame resistance suppressing body 33, and a gravity applied to the frame resistance suppressing body 33. , Are formed asymmetrically with respect to the direction of the flow of fluid through the frame member 132 so as to cancel each other. According to the present embodiment, it is possible to effectively suppress the occurrence of turbulence in the flow and the generation of vortices that may occur particularly on the downstream side of the horizontally provided frame member 132. In addition, the generation of waves can be suppressed near the water surface.
  • the frame resistance suppressing body 33 is formed symmetrically with respect to the flow direction (X direction) of the fluid passing through the axis of the frame member 132. According to the present embodiment, the turbulence and vortex of the flow can be efficiently suppressed on the downstream side of the rotating shaft 100. Further, if the frame resistance suppressing body 33 is provided in the frame 130 near the water surface, generation of waves can be suppressed.
  • the frame resistance suppressing body 33 of the frame members 131 and 132 moves from the upstream side to the downstream side of the fluid in a state of being rotated along the direction of the fluid flow. It is formed so that the thickness in the direction (Z direction) orthogonal to the direction along the axis (Y direction) and the direction of fluid flow (X direction) is thin. According to this embodiment, turbulence and vortices in the flow can be efficiently suppressed on the downstream side of the frame members 131 and 132. In addition, the generation of waves can be suppressed near the water surface.
  • the resistance suppressor (11, 21, 31, 41, 51) rotates so as to rotate along the fluid flow.
  • the bearing (12,22,32,42,52) provided between the suppressor (11,21,31,41,51) and the rotating shaft 100 is further provided. According to this embodiment, the resistance suppressors (11, 21, 31, 41, 51) can smoothly rotate in accordance with the direction of fluid flow.
  • the fluid is wind
  • the rotating shaft 100 is connected to the turbine of the wind power generator. According to the present embodiment, it is possible to suppress flow turbulence and vortices in the wind power generator.
  • the fluid is water
  • the rotating shaft 100 is connected to a turbine of a hydroelectric generator such as a tidal current generator.
  • a hydroelectric generator such as a tidal current generator.

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

Abstract

Dispositif de rotation comprenant des aubes, qui sont fixées à un arbre rotatif et reçoivent l'écoulement d'un fluide et font ainsi tourner l'arbre rotatif, le dispositif étant pourvu d'un suppresseur de résistance qui est supporté axialement sur l'arbre rotatif et tourne avec l'écoulement du fluide de façon à supprimer la résistance agissant sur l'arbre rotatif en raison du fluide s'écoulant depuis le côté amont de l'arbre rotatif.
PCT/JP2019/004207 2019-02-06 2019-02-06 Redresseur WO2020161819A1 (fr)

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JP2019532166A JP6624350B1 (ja) 2019-02-06 2019-02-06 整流装置
PCT/JP2019/004207 WO2020161819A1 (fr) 2019-02-06 2019-02-06 Redresseur

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06323237A (ja) * 1993-05-12 1994-11-22 Oval Corp サボニウス風車
JP2006022798A (ja) * 2004-07-08 2006-01-26 Yukio Hirata 整流式風車
CN102619693A (zh) * 2012-04-05 2012-08-01 昂海松 一种仿生翼结构叶片的风力发电机
JP2012237268A (ja) * 2011-05-13 2012-12-06 Yasuo Ueno 水力発電装置
JP2015007417A (ja) * 2013-05-25 2015-01-15 吉二 玉津 風切羽開閉翼システムを用いた垂直軸式水風車原動機

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06323237A (ja) * 1993-05-12 1994-11-22 Oval Corp サボニウス風車
JP2006022798A (ja) * 2004-07-08 2006-01-26 Yukio Hirata 整流式風車
JP2012237268A (ja) * 2011-05-13 2012-12-06 Yasuo Ueno 水力発電装置
CN102619693A (zh) * 2012-04-05 2012-08-01 昂海松 一种仿生翼结构叶片的风力发电机
JP2015007417A (ja) * 2013-05-25 2015-01-15 吉二 玉津 風切羽開閉翼システムを用いた垂直軸式水風車原動機

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