JP2013204578A - Floating body for gyro type wave-power device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To use force of wind on the sea to increase a shake amount of a floating body.SOLUTION: A floating body for a gyro type wave-power device includes a sail 3 placed above a floating body 2, and a driving mechanism 4 for standing or lodging the sail 3. The driving mechanism 4 is adapted to stand the sail 3 only when the floating body 2 is shaken in the same direction as a wind direction, and lodge the sail 3 when the floating body 2 is shaken in a direction opposite to the wind direction, according to an inclined state of the floating body 2. Since the sail is stood only when the floating body moves in the same direction as the wind direction, wind force is effectively used to increase a shake amount of the floating body. When the floating body moves against the wind direction, the sail is lodged, and so air resistance received by the sail is minimized and a restoration motion of the floating body is not disturbed. Thereby, a power generation amount of the gyro type wave-power device is increased, and power generation efficiency is raised.

Description

  The present invention relates to a floating body for a gyro wave power generation apparatus that can effectively use wind energy to increase the amount of rocking of the floating body.

  Wave power generation is one of the promising power generation methods in Japan surrounded by the sea. Some wave power generation systems temporarily convert the energy from waves into a flow of air or the like to rotate the turbine, but turbine-type devices that use such fluids are capable of generating waves with high efficiency. Since conditions such as size are limited, the apparatus becomes large and not economical in order to increase efficiency.

  Therefore, in recent years, as a device that does not use a fluid, for example, a floating body, a gyro supported by the floating body, and a generator connected to the gimbal shaft of the gyro via a speed increasing means are provided. There has been proposed a gyro-type wave power generation device that drives a generator by rotating a gyro gimbal by swinging.

  In this gyro-type device, the fluctuation of the floating body caused by the waves is converted into the rotational energy of the gyro gimbal to generate electric power, so the power generation amount of the generator depends on the fluctuation amount of the floating body. Therefore, in order to increase the power generation efficiency, various floating structures that are more likely to be shaken have been proposed.

  For example, in Patent Document 1, a gyroscope having at least one vertical gimbal shaft is disposed in a cylindrical device housing, and a donut-shaped floating body in which the device housing is inserted and fixed in an inner cylinder portion is disposed on the sea surface. A structure for floating in the air is disclosed.

  Patent Document 2 discloses a configuration in which an anchor is suspended from a central portion of a short side of a rectangular annular floating body having different vertical and horizontal lengths. Patent Document 3 discloses a configuration in which a floating body is fixed to a support structure having one end fixed to the seabed and the other end extended to the sea through a universal joint so as to be swingable.

  However, any floating bodies proposed in Patent Documents 1 to 3 do not consider using offshore wind power to increase the amount of fluctuation of the floating bodies.

  Even if a sail is set up to receive the wind above the conventional floating body, the air resistance that the sail receives when the floating body is restored in the direction opposite to the wind direction simply by standing the sail. Because the restoration movement is hindered, the amount of the floating body does not increase.

Japanese Patent No. 4469620 Patent 4821008 Japanese Patent No. 4810662

  The problem to be solved by the present invention is that the conventional floating body for a gyro wave power generator cannot use wind power in order to increase the amount of fluctuation of the floating body.

The floating body for a gyro wave power generator of the present invention uses wind power to increase the amount of fluctuation of the floating body, and in order to achieve the purpose of increasing power generation efficiency,
A sail installed above the floating body, and a drive mechanism for raising or lowering the sail, the drive mechanism only when the floating body swings in the same direction as the wind direction according to the inclination state of the floating body The most important feature is that the sail is erected and the sail is laid down when the floating body is shaken in the direction opposite to the wind direction.

  According to the present invention, the sail is raised only when the floating body moves in the same direction as the wind direction according to the inclination state of the floating body that is swung by the waves. As a result, the amount of fluctuation in the rotational direction of the floating body increases.

  On the other hand, in the present invention, when the floating body moves against the wind direction, the sail is laid down, so that the air resistance received by the sail is minimized and the restoring movement of the floating body is not hindered.

  The floating body for a gyro wave power generator of the present invention includes a drive mechanism that raises the sail only when the floating body swings in the same direction as the wind direction, and overturns the sail when the floating body swings in the direction opposite to the wind direction. Therefore, the amount of fluctuation in the rotation direction of the floating body is increased by effectively using the wind pressure moment caused by the wind force.

  Therefore, according to the configuration of the present invention described above, the amount of fluctuation in the rotation direction of the floating body is increased, so that the amount of power generated by the gyro wave power generation device supported or mounted on the floating body is increased and the power generation efficiency is increased.

BRIEF DESCRIPTION OF THE DRAWINGS It is a partially cutaway figure explaining the structure of the floating body for gyro-type wave power generators of a present Example, (a) is the figure seen from the front direction, (b) is the figure seen from the side direction, (c ) Is a view from the direction of the plane. It is a figure explaining the timing of rocking of a floating body and standing or falling of a sail, (a) at the time of standing up (horizontal), (b) at the time of standing up (end), (c) at the time of falling down It is explanatory drawing of (initial). It is a figure explaining the timing of the rocking of a floating body and the stand or fall of a sail, (a) at the time of sail fall (at the time of horizontal), (b) at the time of sail fall (at the end), (c) at the time of sail rise It is explanatory drawing of (initial). It is a figure explaining the structure of the Example which considered the strong wind countermeasure, (a) is a figure of the state which the strong wind began to act at the time of standing up, (b) The sail fell in the same direction as the wind direction by the action of the strong wind It is a figure of a state. It is a figure explaining the example of a mass body, (a) is a some metal ball | bowl, (b) is fluids, such as water, (c) is a figure in the case of using a wheel and a rail.

  Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to FIGS.

  In FIG. 1, reference numeral 1 denotes a floating body 2 that is shaken by a wave and performs a restoring movement, a gyro wave power generator 19 supported on the floating body 2, and a sail 3 that is installed above the floating body 2 and receives wind force. And a floating body for a gyro wave power generator according to this embodiment provided with a drive mechanism 4 for raising or lowering the sail 3 at a required timing.

  In the present embodiment, the floating body 2 uses a steel floating body, and a necessary buoyancy is obtained by adopting a hollow structure. The floating body 2 is moored on the seabed by a mooring line (not shown) to prevent drifting. In the present embodiment, the sail 3 has a structure in which a sheet-like member is attached to a truss-like bone member.

  As the sheet-like member of the sail 3, for example, a resin film having excellent weather resistance such as vinyl chloride, acrylic, ABS, polycarbonate, fluororesin, epoxy resin, polyethylene, polyolefin, or a cloth knitted with those fibers is used. Can do.

  As shown in FIG. 1A, a driven shaft 5 for rotating the sail 3 is attached to the bone member of the sail 3. Therefore, the sail 3 can be switched from the standing state to the lying state or from the lying state to the standing state by rotating the driven shaft 5.

  The driving mechanism 4 is a cylindrical driving body 6 that is hollow, and a metal ball that can move freely inside the driving body 6 in the left-right direction in FIG. 1B. , A drive shaft 8 attached to the side surface of the drive body 6, and a transmission mechanism 9 that rotates the driven shaft 5 by the rotation of the drive shaft 8.

  In this embodiment, the transmission mechanism 9 uses a gear device that includes a drive gear 10 attached to the drive shaft 8 and a driven gear 11 attached to the driven shaft 5 and meshed with the drive gear 10. .

  Therefore, the rotational force when the drive body 6 rotates about the drive shaft 8 is transmitted to the driven shaft 5 via the drive gear 10 and the driven gear 11, so that the driven shaft 5 is rotated by the rotation of the drive shaft 8. Rotates, and the sail 3 can stand or fall.

That is, the floating body 1 for the gyro wave power generator of this embodiment is
The sail 3 is raised or laid down by the rotation of the driven shaft 5,
The drive mechanism 4 includes a drive body 6, a mass body 7 movable within the drive body 6, a drive shaft 8 attached to a side surface of the drive body 6, and the driven shaft by rotation of the drive shaft 8. And a transmission mechanism 9 that rotates 5,
When the floating body 2 swings, the drive body 6 rotates about the drive shaft 8 by the movement of the mass body 7, and the transmission mechanism 9 is rotated by the rotation of the drive shaft 8 by the rotation of the drive body 6. Accordingly, the driven shaft 5 rotates, and the sail 3 rises or falls by the rotation of the driven shaft 5.

  As shown in FIG. 1B, the driving body 6 is installed so as to be inclined at a predetermined angle with respect to the horizontal plane when the floating body 2 is in a horizontal state. The inclination angle of the driving body 6 is the inclination angle of the floating body 2 that switches between standing and falling of the sail 3.

  According to various studies by the present inventors, it has been found that the inclination angle of the driving body 6 in the state of FIG. 1B is preferably within a range of ± 10 to 30 ° with respect to the horizontal plane. This is because when the angle is larger than 30 °, there is an increased risk that the floating body 1 for the gyro wave power generation device will be overturned. Further, when the angle is less than 10 °, the effect of the present invention that increases the swinging of the floating body in the rotation direction becomes difficult to obtain due to the wind pressure moment acting using wind power.

  Further, in this embodiment, the number of teeth of the drive gear 10 in the gear device is larger than the number of teeth of the driven gear 11 to amplify the rotation amount of the driven shaft 5 rather than the rotation amount of the drive shaft 8. Like to do. In this case, the amount by which the amount of rotation is amplified is determined from the amount of rotation necessary for raising or lowering the sail 3.

That is, the floating body 1 for the gyro wave power generator of this embodiment is
A transmission mechanism 9 includes a drive gear 10 attached to the drive shaft 8 and a driven gear 11 attached to the driven shaft 5 and meshed with the drive gear 10. The amount of rotation of the driven shaft 5 is amplified.

  Reference numeral 12 denotes a central support body that includes the drive gear 10 and the driven gear 11 and includes bearings 13 and 14 that respectively support one end of the drive shaft 8 and one end of the driven shaft 5. In the present embodiment, two central support bodies 12 are installed at positions sandwiching the drive body 6. In FIGS. 1A and 1C, the central support 12 is shown with a part of the housing cut away so that the internal gear device can be seen.

  Reference numeral 16 denotes an end support that includes a bearing 15 that supports the other end of the driven shaft 5 and supports the sail 3 together with the central support 12. Two end supports 16 are installed at both ends of the floating body 2.

  Reference numeral 17 denotes a cushioning material that alleviates an impact when the mass body 7 moving inside the drive body 6 collides with the inner wall surfaces at both ends of the drive body 6. As the material of the buffer material 17, for example, rubber, foamed plastic, shock absorbing gel, coil spring or the like can be used. Moreover, the material of these buffer materials 17 may be used alone or in combination.

  Reference numeral 18 denotes a driving body holding member that alleviates an impact when both ends of the driving body 6 collide with the installation surface of the driving body 6 when the driving body 6 rotates. As the material of the driving body holding member 18, for example, rubber or the like can be used.

  Reference numeral 19 denotes a gyro wave power generator. The gyro wave power generator 19 includes a cymbal that is rotated by a wave, a gimbal shaft that is the center of rotation of the cymbal, a gimbal bearing base for supporting the cymbal shaft, and a wheel support shaft. A main drive unit such as a rotating flywheel and a generator connected to the gimbal shaft via speed increasing means are mounted.

  According to the above configuration, the drive mechanism 4 erects the sail 3 only when the floating body 2 swings in the same direction as the wind direction, and the floating body 2 swings in the direction opposite to the wind direction, according to the inclined state of the floating body 2. When doing so, the sail 3 can be laid down.

  Next, with reference to FIG. 2 and FIG. 3, the timing of swinging the floating body and raising or falling the sail will be described in more detail. 2 and 3, the wind is blowing from the left side to the right side of the drawing.

1) When the floating body 2 is horizontal and the sail 3 stands, the drag is generated by the sail 3 receiving wind force, and the floating body 2 starts to tilt in the leeward direction. At this time, the mass body 7 in the driving body 6 is located at an end portion on the left side toward the paper surface.

2) The floating body 2 is inclined in the leeward direction (clockwise direction), and the angle θ formed by the horizontal plane and the driving body 6 is a negative angle (an angle smaller than 0 °) as shown in FIG. Then, the mass body 7 in the driving body 6 rolls by gravity and moves to the end on the opposite side (right side as viewed in the drawing).

3) When the mass body 7 moves to the opposite end, a moment is generated in the drive shaft 8 and rotates clockwise about the drive shaft 8 until the drive body 6 contacts the drive body support member 18. To do. The rotational force of the drive shaft 8 is transmitted to the driven shaft 5 via the drive gear 10 and the driven gear 11 in the central support 12, and as shown in FIG. Rotate in a counterclockwise direction and lie down.

4) From the state of FIG. 2 (c), the floating body 2 generates a moment in the reverse direction (counterclockwise direction) due to the restoring force of the floating body 2 itself, and starts to move upwind. As shown in FIG. 3A, since the inertial force is applied even after the floating body 2 becomes horizontal, the floating body 2 is further inclined to the windward side.

5) When the floating body 2 is inclined to the windward side and the angle θ between the horizontal plane and the driving body 6 becomes a positive angle (an angle larger than 0 °), the mass body 7 in the driving body 6 rolls due to gravity, As shown in FIG. 3 (b), it moves to the opposite end (left side as viewed in the drawing).

6) When the mass body 7 moves to the opposite end, a moment is generated in the drive shaft 8, and the drive body 6 is rotated counterclockwise about the drive shaft 8 until the drive body 6 contacts the drive body support member 18. Rotate. The rotational force of the drive shaft 8 is transmitted to the driven shaft 5 via the drive gear 10 and the driven gear 11 in the central support 12, and as shown in FIG. 3C, the sail 3 is in the same direction as the wind direction ( Stand up by rotating in the clockwise direction.

  As described above, the floating body 2 and the sail 3 return to the state 1), and the operations 1) to 6) are repeated thereafter.

  In this way, the floating body 1 for the gyro wave power generator of this embodiment can stand the sail 3 only when the floating body 2 is shaken in the same direction as the wind direction. Using the moment, the amount of fluctuation in the rotation direction of the floating body increases. Further, when the floating body 2 is shaken in the direction opposite to the wind direction, the sail 3 can be laid down in the direction opposite to the wind direction, so that the air resistance received by the sail 3 is minimized and the restoring motion of the floating body is not hindered. Therefore, since the amount of fluctuation in the rotation direction of the floating body increases, the power generation efficiency of the gyro wave power generation device 19 can be increased.

  FIG. 4 is a diagram for explaining the configuration of the second embodiment in consideration of strong wind countermeasures. A difference in configuration from the above-described embodiment is that an intermediate gear 20 is interposed between the drive gear 10 and the driven gear 11 in the transmission mechanism 9 in the central support 12.

  Further, in the second embodiment, when the wind force received by the sail 3 exceeds a predetermined strength, the moment around the driven shaft 5 is larger than the moment around the drive shaft 8 by the mass body 7. The number of teeth of the driven gear 11, the intermediate gear 20, and the drive gear 10 of the transmission mechanism 9 is adjusted.

  Therefore, in the second embodiment, the rotation direction of the driving body 6 and the rotation direction of the sail 3 are the same, and as shown in FIG. 4 (a), when a strong wind of a predetermined wind speed or more begins to act on the sail 3. As shown in FIG. 4B, the sail 3 can be laid down in the same direction as the wind direction. Reference numeral 21 denotes a rotation shaft of the intermediate gear 20.

  Thus, the floating body 1 for the gyro wave power generator of the second embodiment makes the rotation direction of the drive shaft 8 and the rotation direction of the driven shaft 5 the same, and the sail 3 has a predetermined wind speed or higher. The amount of moment generated by the rotation of the driving body 6 is adjusted so that the sail 3 falls over when wind acts.

  In the second embodiment, when excessive drag acts on the sail 3 due to strong wind or the like, the driving body 6 is rotated by the wind force regardless of the inclination angle of the floating body 2 and the sail 3 falls in the same direction as the wind direction. Excessive shaking of the floating body 2 and damage to the sail 3 and the drive mechanism 4 can be prevented.

  As described above, the floating body for the gyro wave power generator of the present invention stands up only when moving in the same direction as the wind direction, and rotates the floating body using the wind pressure moment caused by the wind force received by the sail. Since the amount of swaying in the direction increases and the sail is laid down when moving against the wind direction, the mechanism that does not impede the movement due to the restoring force of the floating body by minimizing the air resistance received by the sail is provided. Effective use of the wind pressure moment increases the amount of rocking of the floating body. Therefore, the power generation amount of the gyro wave power generator is also increased, and the power generation efficiency is increased.

  Further, in the present invention, a power source such as a hydraulic / pneumatic device or a motor is not required for controlling the drive mechanism for standing or lying the sail. Therefore, since no power is consumed, the power generated by the gyro wave power generator is not reduced.

  Moreover, according to the structure of 2nd Example, a sail can maintain a fall state at the time of a storm, and the overturn of a floating body and breakage of a sail can be prevented.

  The present invention is not limited to the above-described embodiments, and it goes without saying that the embodiments may be changed as appropriate within the scope of the technical idea described in each claim.

  For example, in the above-described embodiment, an example in which a single metal sphere is used as the configuration of the mass body 7 in the drive body 6 is shown. However, as shown in FIG. A metal ball 71 may be used. Further, the mass body 7 is not limited to a metal sphere, and a fluid 72 such as water or sand may be used as shown in FIG.

  Furthermore, the mass body 7 can also be a carriage 74 having wheels 73 as shown in FIG. 5 (c). In this case, the mass body 7 is moved on the rail 61 attached to the inner surface of the driving body 6, What is necessary is just to set it as the structure which receives both ends with the ring stopper 62. FIG. The shape of the driving body 6 is not limited to the cylindrical shape shown in the embodiment, and may be a rectangular parallelepiped, for example.

  Moreover, in the said Example, although the floating body 2 showed the rectangular shape, the shape of the floating body 2 is not restricted to this. The floating body 2 may be, for example, circular, cylindrical, hemispherical, or annular, and may be a floating body that is divided into two or more.

  In the embodiment, the floating body 2 made of steel and having a hollow structure is shown. However, the material of the floating body 2 may be, for example, a resin excellent in weather resistance, fiber reinforced plastic (FRP), or the like. Moreover, when providing a mooring line in the floating body 2, it can be set as a 3 point mooring or a 4 point mooring, for example, and the mooring method is not limited.

  Moreover, although the example which provides one sail 3 was shown in the said Example, you may install two or more sails 3. In this case, it is desirable to arrange a plurality of sails 3 in a direction perpendicular to the wind direction. In addition, the angle at which the sail 3 stands is desirably 90 ° with respect to the horizontal plane when the floating body 2 is in a horizontal state, but other angles may be used.

  Moreover, in the said Example, although the sail 3 disclosed the example using the resin-made film excellent in the weather resistance, or the cloth knitted by those fibers, it is not restricted to this. The sail 3 may be, for example, a cloth knitted with carbon fiber or glass fiber, or a fiber reinforced plastic (FRP) plate or a metal plate may be used.

  In the above-described embodiment, the gear device including the drive gear 10 and the driven gear 11 is used as the transmission mechanism that amplifies the rotation amount of the drive shaft 8, but is not limited thereto. For example, a mechanism using a driving pulley, a driven pulley, and a transmission belt may be used.

  That is, the transmission mechanism 9 of the present invention includes a drive pulley attached to the drive shaft 8, a driven pulley attached to the driven shaft 5 and amplifying the amount of rotation of the drive pulley, and the drive pulley and the driven pulley. You may comprise with the transmission belt wound around.

  In this case, if the diameter of the driving pulley is larger than the diameter of the driven pulley, the amount of rotation of the driving body 8 can be amplified and the sail 3 can be raised or laid down. In the present invention, a mechanism for amplifying the rotation amount of the drive shaft 8 may be provided as necessary, and is not an essential mechanism.

  In the embodiment, the gyro wave power generator 19 is supported on the floating body 2. However, the gyro wave power generator 19 may be mounted in the floating body 2.

DESCRIPTION OF SYMBOLS 1 Floating body for gyro wave power generator 2 Floating body 3 Sail 4 Drive mechanism 5 Drive shaft 6 Drive body 7 Mass body 8 Drive shaft 9 Drive mechanism 10 Drive gear 11 Drive gear 12 Central support body 13 Bearing (for drive shaft)
14 Bearing (for driven shaft)
15 Bearing (for driven shaft)
16 End support 17 Buffer material 18 Drive body holding member 19 Gyro wave power generator 20 Intermediate gear 21 Rotating shaft

Claims (5)

  A sail installed above the floating body, and a drive mechanism for raising or lowering the sail, the drive mechanism only when the floating body swings in the same direction as the wind direction according to the inclination state of the floating body A floating body for a gyro wave power generator, wherein the sail is erected and the sail is overturned when the floating body shakes in a direction opposite to a wind direction. The sail is raised or laid down by rotation of a driven shaft,
The drive mechanism includes a drive body, a mass body movable within the drive body, a drive shaft attached to a side surface of the drive body, and a transmission mechanism that rotates the driven shaft by rotation of the drive shaft. Prepared,
When the floating body swings, the driving body rotates about the driving shaft by the movement of the mass body, and the driven shaft rotates through the transmission mechanism by the rotation of the driving shaft by the rotation of the driving body. The floating body for a gyro wave power generator according to claim 1, wherein the sail is raised or laid down by rotation of the driven shaft. The transmission mechanism is
A drive gear attached to the drive shaft;
A driven gear attached to the driven shaft and meshed with the drive gear;
The floating body for a gyro wave power generator according to claim 2, wherein the rotation amount of the driven shaft is amplified more than the rotation amount of the drive shaft. The transmission mechanism is
A drive pulley attached to the drive shaft;
A driven pulley attached to the driven shaft and amplifying the amount of rotation of the drive pulley;
The floating body for a gyro wave power generator according to claim 2, comprising a transmission belt wound around the drive pulley and the driven pulley.   A moment generated by rotation of the drive body so that the rotation direction of the drive shaft and the rotation direction of the driven shaft are the same, and the wind is overturned when wind of a predetermined wind speed or more acts on the sail The floating body for a gyro wave power generator according to claim 2, wherein the amount is adjusted.

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