JP2018076789A - Tidal current power generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tidal current power generator capable of facilitating installation work and removal work of a turbine.SOLUTION: A tidal current power generator includes a support member supported by a marine structure, an anchor placed at the sea bottom, a wire connecting the support member with the anchor, a first positioning member fixed by the wire, and a turbine unit. The turbine unit includes a turbine, a second positioning member which is detachably attached to the wire and is fitted with the first positioning member, and a float which can adjust its own weight.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a tidal current power generation apparatus.

  As a power generation method using renewable energy, tidal power generation that generates electric power from kinetic energy of ocean currents is known. For example, Patent Document 1 describes a power generation device including a water wheel supported by a bridge pier. And it is described that it becomes unnecessary to provide the support structure which supports a water turbine because the water wheel is supported by the bridge pier.

JP 2005-214142 A

  By the way, in tidal current power generation, a water turbine must be positioned at a predetermined position in the sea. However, since the place where the tidal current power generation device is installed is a place where the ocean current is fast, it is not easy to remove the water turbine when it is necessary to install and maintain the water turbine.

  This invention is made | formed in view of the above, Comprising: It aims at providing the tidal power generator which can make the installation work and removal work of a turbine easy.

  In order to solve the above-described problems and achieve the object, a tidal current power generation device according to the present invention includes a support member supported by an offshore structure, an anchor disposed on the seabed, the support member, and the anchor. A connecting wire, a first positioning member fixed to the wire, a turbine, a second positioning member that can be attached to and detached from the wire and fits into the first positioning member, and a float that can adjust its own weight. A turbine unit.

  Thus, when the turbine unit is installed in the sea, the turbine unit is lowered along the wire by increasing the weight of the float. Then, when the second positioning member is engaged with the first positioning member, the turbine unit is positioned at a predetermined position in the sea. On the other hand, when the turbine unit is removed from the sea, the weight of the float is reduced, so that the turbine unit rises along the wire by buoyancy. The turbine unit that has surfaced to the water surface can be easily moved on the water surface by a ship. Therefore, the tidal current power generation device can facilitate the installation work and removal work of the turbine.

  As a desirable aspect of the present invention, the second positioning member preferably includes a slit having a width equal to or larger than the outer diameter of the wire.

  Thereby, the operation | work which attaches a 2nd positioning member to a wire, and the operation | work which removes a 2nd positioning member from a wire become easy.

  As a desirable aspect of the present invention, it is preferable that the tidal current power generation device includes a plurality of the wires, the first positioning members, and the second positioning members.

  Thereby, the 2nd positioning member fits into the 1st positioning member in a plurality of positions. For this reason, even if a turbine unit receives an ocean current, it becomes difficult to rock | fluctuate. Specifically, in the turbine unit, movement in a direction that forms an angle with respect to an orthogonal plane with respect to a vertical plane including a plurality of wires is suppressed. For this reason, it becomes difficult for the kinetic energy of the ocean current to be consumed by the oscillation of the turbine unit. Therefore, stable power generation can be performed.

  As a desirable mode of the present invention, it is preferable that the plurality of first positioning members are arranged at a plurality of positions in the vertical direction.

  Thereby, the second positioning member is fitted to the first positioning member at a plurality of positions in the vertical direction. For this reason, even if a turbine unit receives an ocean current, it becomes difficult to rock | fluctuate. Specifically, in the turbine unit, movement in a direction that forms an angle with respect to a vertical plane including a plurality of wires is suppressed. For this reason, it becomes difficult for the kinetic energy of the ocean current to be consumed by the oscillation of the turbine unit. Therefore, stable power generation can be performed.

  As a desirable mode of the present invention, there are three first positioning members, and the positions of the two first positioning members are the same in the vertical direction, and on the upper side in the vertical direction than the other first positioning member. Preferably there is.

  As a result, the turbine unit is less likely to swing. For this reason, consumption of the kinetic energy of the ocean current due to the oscillation of the turbine unit 2 is further suppressed. Therefore, more stable power generation can be performed.

  ADVANTAGE OF THE INVENTION According to this invention, the tidal current power generation apparatus which can make the installation work and removal work of a turbine easy can be provided.

FIG. 1 is a schematic diagram showing a tidal current power generation apparatus according to the present embodiment. FIG. 2 is a view taken in the direction of arrow A in FIG. FIG. 3 is a perspective view showing a turbine case according to the present embodiment. FIG. 4 is a side view showing the first positioning member and the second positioning member according to the present embodiment. 5 is a cross-sectional view taken along the line BB in FIG. 6 is a cross-sectional view taken along the line CC in FIG. FIG. 7 is a flowchart showing a turbine unit installation method according to this embodiment. FIG. 8 is a flowchart showing a turbine unit removal method according to this embodiment. FIG. 9 is a schematic diagram showing a state when the turbine unit according to the present embodiment is being pulled by a ship. FIG. 10 is a schematic diagram illustrating a state when the second positioning member according to the present embodiment is fitted to the wire. FIG. 11 is a schematic diagram showing a state when water is poured into the float according to the present embodiment. FIG. 12 is a schematic diagram illustrating a tidal current power generation device according to the first modification. 13 is a view taken in the direction of arrow D in FIG. FIG. 14 is a schematic diagram illustrating a tidal current power generation device according to the second modification. 15 is a view taken in the direction of arrow E in FIG.

  Hereinafter, the present invention will be described in detail with reference to the drawings. The present invention is not limited by the following modes for carrying out the invention (hereinafter referred to as embodiments). In addition, constituent elements in the following embodiments include those that can be easily assumed by those skilled in the art, those that are substantially the same, and those in a so-called equivalent range. Furthermore, the constituent elements disclosed in the following embodiments can be appropriately combined.

(Embodiment)
FIG. 1 is a schematic diagram showing a tidal current power generation apparatus according to the present embodiment. As shown in FIG. 1, the tidal current power generation device 100 is a device that generates electric power from kinetic energy of ocean currents. The tidal current power generation device 100 is supported by the bridge 9 and installed in the sea near the bridge 9. The bridge 9 is provided in the strait at a position where the distance between land is small. For this reason, in the place where the bridge 9 is provided, the flow of the ocean current is relatively fast. Since the tidal current power generation device 100 is installed in the sea in the vicinity of the bridge 9, the kinetic energy of the ocean current can be easily obtained. Further, the bridge 9 is provided with a transmission line 10 for transmitting the electric power generated by the tidal current power generation device 100 to a substation or the like. The power transmission line 10 is provided along the bridge 9 to the land.

  As shown in FIG. 1, the tidal current power generation device 100 includes a support member 8, an anchor 3, a wire 4, a first positioning member 6, and a turbine unit 2. The turbine unit 2 is positioned at a predetermined position in the sea by the support member 8, the anchor 3, the wire 4, and the first positioning member 6.

  As shown in FIG. 1, the support member 8 is a member fixed to the bridge pier 91 of the bridge 9. The support member 8 is a plate-like member parallel to a horizontal plane, for example, and is formed of steel or the like. The support member 8 protrudes from the pier 91 in a direction intersecting with the longitudinal direction of the bridge 9, for example. Moreover, the edge part of the supporting member 8 is located above the sea level.

  As shown in FIG. 1, the anchor 3 is a member submerged in the seabed. The anchor 3 is steel, for example, and the density of the anchor 3 is larger than the density of seawater. The anchor 3 is fixed at a predetermined position on the seabed by a frictional force generated between the anchor 3 and the seabed. For example, the anchor 3 is disposed directly below the end of the support member 8.

  FIG. 2 is a view taken in the direction of arrow A in FIG. The wire 4 is a string-like member formed of, for example, stainless steel. For example, as shown in FIG. 2, two wires 4 are provided. Each wire 4 connects the support member 8 and the anchor 3 as shown in FIG. That is, one end of the wire 4 is fixed to the support member 8, and the other end of the wire 4 is fixed to the anchor 3. For example, the other end of the wire 4 is fixed to the anchor 3 on land before the anchor 3 is submerged in the seabed. The wire 4 connects the support member 8 and the anchor 3 at the shortest distance. That is, the wire 4 is connected to the support member 8 and the anchor 3 so as not to bend in the sea. The longitudinal direction of the wire 4 is substantially equal to the vertical direction.

  The first positioning member 6 is fixed to the wire 4 at a position between the support member 8 and the anchor 3 and in the sea. For example, as shown in FIG. 2, two first positioning members 6 are provided, and the vertical positions of the two first positioning members 6 are the same.

  As shown in FIGS. 1 and 2, the turbine unit 2 includes a turbine case 20, a turbine 21, a generator 22, a float 23, and a second positioning member 5.

  FIG. 3 is a perspective view showing a turbine case according to the present embodiment. The turbine case 20 is a member for housing the turbine 21. As shown in FIG. 3, the turbine case 20 is a rectangular parallelepiped member, for example. Specifically, the turbine case 20 includes a vertical member 201, a cross member 202, a cross member 203, a cross member 204, and a cross member 205. The vertical member 201 is a long member, for example, four pieces are provided. The cross member 202, the cross member 203, the cross member 204, and the cross member 205 are rectangular members that overlap each other in plan view, for example. Each vertical member 201 connects the vertices of the cross member 202, the cross member 203, the cross member 204, and the cross member 205. One side of the cross member 202, the cross member 203, the cross member 204, and the cross member 205 is shorter than the length of the vertical member 201.

  The turbine case 20 supports the turbine 21 rotatably. For example, the shaft of the turbine 21 is supported by the bearings supported by the cross member 202 and the cross member 205. Further, since the turbine case 20 has a plurality of openings, seawater can be guided to the turbine 21 while supporting the turbine 21. Further, the turbine case 20 can suppress contact between the large suspended matter that has been swept away by the ocean current and the turbine 21. Thereby, damage to the turbine 21 is suppressed.

  The turbine 21 rotates around an axis parallel to the vertical direction, for example, by receiving the ocean current. The turbine 21 is connected to the generator 22, and the rotation of the turbine 21 is transmitted to the generator 22. Thereby, when the turbine 21 rotates, electric power is generated by the generator 22. The generator 22 is connected to the power transmission line 10 provided on the bridge 9. For this reason, the electric power generated by the generator 22 is transmitted to a substation or the like through the transmission line 10. The generator 22 is disposed on the upper side in the vertical direction of the turbine 21. Thereby, since the distance from the generator 22 to the power transmission line 10 becomes short, the electric wire which connects the generator 22 and the power transmission line 10 becomes short.

  The float 23 is a hollow member in which air can be injected and discharged by, for example, a pump. The float 23 is made of, for example, a resin. As shown in FIG. 3, the float 23 is attached to the upper side of the generator 22 in the vertical direction. Thereby, the center of gravity of the turbine unit 2 tends to be shifted downward in the vertical direction. For this reason, the attitude | position of the turbine unit 2 is easy to be stabilized. Note that liquid, not air, may be injected into and discharged from the float 23.

  As shown in FIGS. 1 and 2, the second positioning member 5 is a member that protrudes from the turbine case 20 in the horizontal direction. The second positioning member 5 is a member fitted to the first positioning member 6. For example, as shown in FIG. 2, two second positioning members 5 are provided, and the vertical positions of the two second positioning members 5 are the same.

  FIG. 4 is a side view showing the first positioning member and the second positioning member according to the present embodiment. 5 is a cross-sectional view taken along the line BB in FIG. 6 is a cross-sectional view taken along the line CC in FIG. FIG. 4 shows a state before the second positioning member 5 is fitted to the first positioning member 6. As shown in FIGS. 4 and 5, the second positioning member 5 includes a connection part 51, a disk part 52, a conical part 53, and a slit 54. The connecting portion 51 is a member that is fixed to the turbine case 20. The disk part 52 is a substantially disk-shaped member provided at the end of the connection part 51. The conical portion 53 is a conical member provided on the lower side in the vertical direction of the disc portion 52. The outer diameter of the conical portion 53 decreases toward the lower side in the vertical direction. In other words, the conical portion 53 is a wedge-shaped protrusion that protrudes downward in the vertical direction. The slit 54 is a notch provided from an end portion on the upper side in the vertical direction of the disk portion 52 to an end portion on the lower side in the vertical direction of the conical portion 53. The width D1 of the slit 54 is not less than the outer diameter D2 of the wire 4 and is substantially equal to the outer diameter D2, for example. Further, the horizontal length D3 of the slit 54 in the horizontal cross section of the disk portion 52 is larger than the diameter D4 of the disk portion 52, and the horizontal length of the slit 54 in the horizontal cross section of the conical portion 53 is the length of the conical portion 53. Greater than diameter. As shown in FIG. 5, one end in the horizontal direction of the slit 54 is located at the center of the disk portion 52 in plan view, and the other end in the horizontal direction of the slit 54 is open. For this reason, the wire 4 can be fitted into the slit 54 and can be detached from the slit 54. That is, the second positioning member 5 can be attached to and detached from the wire 4.

  As shown in FIGS. 4 and 6, the first positioning member 6 includes a recess 63 and a hole 62. The recess 63 is a conical recess whose inner diameter decreases toward the lower side in the vertical direction. The concave portion 63 has a shape that fits with the conical portion 53 of the second positioning member 5. The hole 62 is a through hole that is provided in the center of the recess 63 in a plan view and penetrates in the vertical direction. The wire 4 passes through the hole 62. As shown in FIG. 4, the first positioning member 6 is positioned in the vertical direction by an auxiliary member 61 fixed to the wire 4. The auxiliary member 61 is fixed to the wire 4 by welding or the like, for example.

  Note that the auxiliary member 61 shown in FIG. 4 may be omitted. For example, if the first positioning member 6 is fixed to the wire 4 by welding or the like, the first positioning member 6 is positioned in the vertical direction, and thus the auxiliary member 61 is unnecessary.

  Note that the number of the wires 4 is not necessarily two. For example, one wire 4 or three or more wires 4 may be used. However, it is preferable that there is one first positioning member 6 attached to one wire 4. Moreover, the longitudinal direction of the wire 4 does not necessarily have to follow the vertical direction, and may have an angle with respect to the vertical direction. Further, the turbine 21 does not necessarily have to rotate about an axis parallel to the vertical direction, for example, and may rotate about an axis having an angle in the vertical direction.

  The first positioning member 6 and the second positioning member 5 do not necessarily have the shape described above. For example, the first positioning member 6 may have a protrusion corresponding to the conical portion 53, and the second positioning member 5 may have a recess corresponding to the recess 63.

  Note that the longitudinal member 201, the transverse member 202, the transverse member 203, the transverse member 204, and the transverse member 205 of the turbine case 20 do not necessarily have to be formed of square members as shown in FIG. For example, the cross member 202, the cross member 203, the cross member 204, and the cross member 205 may each be formed of a round bar.

  In addition, the float with which the turbine unit 2 is not necessarily required to be one, and may be provided with the some float. For example, the turbine unit 2 may include a second float on the lower side in the vertical direction of the turbine case 20.

  Note that the support member 8 does not necessarily have to be supported by the pier 91 of the bridge 9 and may be supported by the offshore structure. For example, the support member 8 may be supported as a marine structure by a port structure such as a breakwater, a pier, or a wharf.

  FIG. 7 is a flowchart showing a turbine unit installation method according to this embodiment. FIG. 8 is a flowchart showing a turbine unit removal method according to this embodiment. FIG. 9 is a schematic diagram showing a state when the turbine unit according to the present embodiment is being pulled by a ship. FIG. 10 is a schematic diagram illustrating a state when the second positioning member according to the present embodiment is fitted to the wire. When the turbine unit 2 needs to be maintained after the turbine unit 2 is installed in the sea, the turbine unit 2 may be removed from the sea. For example, in the prior art, a work ship equipped with a large crane facility or the like is required for the installation or removal work of the turbine. It is not easy to install or remove a turbine using such a work ship in a place where the ocean current is fast.

  As shown in FIG. 7, when the turbine unit 2 is installed, the turbine unit 2 is first pulled by the ship 11 (step S11). Specifically, as shown in FIG. 9, the turbine unit 2 is pulled by the ship 11 while being connected to the ship 11 by a rope 12. At this time, for example, the inside of the float 23 is filled with air. Thereby, the turbine unit 2 is pulled with the float 23 floating on the water surface.

  Next, the second positioning member 5 is fitted to the wire 4 (step S12). Specifically, as shown in FIG. 5, the wire 4 is fitted into the slit 54 of the second positioning member 5. As a result, as shown in FIG. 10, a state is formed in which the second positioning member 5 is positioned directly above the first positioning member 6.

  Next, the turbine unit 2 is detached from the ship 11 (step S13). Specifically, the connection between the turbine unit 2 and the rope 12 is released, and the rope 12 is recovered by the ship 11.

  Then, exhaust from the float 23 is started (step S14). For example, a pump provided in the ship 11 is connected to the float 23 with a hose or the like, and exhaust is performed by operating the pump. Specifically, the displacement is adjusted so that at least the weight of the turbine unit 2 exceeds the buoyancy acting on the turbine unit 2. Thereby, since seawater infiltrates into the float 23, the turbine unit 2 sinks into the sea along the wire 4 by its own weight as shown in FIG. Further, the exhaust amount with respect to the float 23 is adjusted so that the center of gravity of the turbine unit 2 is located below the intermediate position of the turbine unit 2 in the vertical direction. Thereby, the attitude | position of the turbine unit 2 at the time of a fall is stabilized. Thereafter, when the second positioning member 5 is fitted into the first positioning member 6, the turbine unit 2 is stopped. Thereby, the turbine unit 2 is positioned in the vertical direction, and the state shown in FIG. 1 is obtained. In this way, the turbine unit 2 is installed in the sea.

  As shown in FIG. 8, when the turbine unit 2 is removed, air supply to the float 23 is first started (step S21). For example, a pump provided in the ship 11 is connected to the float 23 with a hose or the like, and air is supplied by operating the pump. Specifically, the air supply amount is adjusted so that at least the weight of the turbine unit 2 is less than the buoyancy acting on the turbine unit 2. Thereby, the turbine unit 2 rises to the water surface along the wire 4 by buoyancy. Further, the air supply amount in the float 23 is adjusted so that the center of gravity of the turbine unit 2 is located below the intermediate position of the turbine unit 2 in the vertical direction. Thereby, the attitude | position of the turbine unit 2 at the time of a raise is stabilized.

  Next, the turbine unit 2 that has floated to the water surface is connected to the ship 11 (step S22). Specifically, the turbine unit 2 is connected to the ship 11 by a rope 12. As a result, the state shown in FIG. 10 is obtained.

  Next, the second positioning member 5 is separated from the wire 4 (step S23). Specifically, the wire 4 is detached from the slit 54 of the second positioning member 5. Thereby, the turbine unit 2 becomes movable in the horizontal direction.

  Then, the turbine unit 2 is pulled by the ship 11 (step S24). Specifically, the turbine unit 2 is pulled by the ship 11 while being connected to the ship 11 by the rope 12. At this time, for example, the inside of the float 23 is filled with air. Thereby, the turbine unit 2 is pulled with the float 23 floating on the water surface. In this way, the turbine unit 2 is removed.

  As described above, the tidal current power generation device 100 includes the support member 8 supported by the offshore structure (pier 91), the anchor 3 disposed on the seabed, and the wire 4 that connects the support member 8 and the anchor 3 to each other. The first positioning member 6 fixed to the wire 4 and the turbine unit 2 are provided. The turbine unit 2, the turbine 21, a second positioning member 5 that can be attached to and detached from the wire 4 and fitted to the first positioning member 6, and a float 23 that can adjust its own weight.

  Thereby, when the turbine unit 2 is installed in the sea, the turbine unit 2 descends along the wire 4 by increasing the weight of the float 23. And when the 1st positioning member 6 fits the 2nd positioning member 5, the turbine unit 2 is positioned in the predetermined position in the sea. On the other hand, when the turbine unit 2 is removed from the sea, the weight of the float 23 is reduced, so that the turbine unit 2 rises along the wire 4 by buoyancy. The turbine unit 2 that has floated to the water surface can be easily moved on the water surface by the ship 11. Therefore, the tidal current power generation apparatus 100 can facilitate the installation work and removal work of the turbine 21. More specifically, the tidal current power generation apparatus 100 can eliminate the need for a work ship equipped with a large crane facility that was necessary in the prior art.

  Further, in the tidal current power generation device 100, the second positioning member 6 includes a slit 54 having a width D <b> 1 that is equal to or larger than the outer diameter D <b> 2 of the wire 4.

  Thereby, the operation | work which attaches the 2nd positioning member 6 to the wire 4, and the operation | work which removes the 2nd positioning member 6 from the wire 4 become easy.

  The tidal current power generation apparatus 100 includes a plurality of wires 4, first positioning members 6, and second positioning members 5.

  Accordingly, the second positioning member 5 is fitted to the first positioning member 6 at a plurality of positions. For this reason, even if the turbine unit 2 receives an ocean current, it becomes difficult to swing. Specifically, in the turbine unit 2, movement in a direction that makes an angle with respect to an orthogonal plane with respect to a vertical plane including the plurality of wires 4 (a vertical plane orthogonal to the paper plane in FIG. 2) is suppressed. For this reason, it becomes difficult for the kinetic energy of the ocean current to be consumed by the oscillation of the turbine unit 2. Therefore, stable power generation can be performed.

(Modification 1)
FIG. 12 is a schematic diagram illustrating a tidal current power generation device according to the first modification. 13 is a view taken in the direction of arrow D in FIG. Note that the same components as those described in the above-described embodiment are denoted by the same reference numerals, and redundant description is omitted.

  As illustrated in FIG. 13, the tidal current power generation device 100A according to Modification 1 includes a wire 4a, a wire 4b, a wire 4c, a first positioning member 6a, a first positioning member 6b, and a first positioning member 6c. . Each of the wire 4a, the wire 4b, and the wire 4c connects the support member 8 and the anchor 3 with the shortest distance. The wire 4a, the wire 4b, and the wire 4c are arranged on the same straight line in a plan view. The first positioning member 6a is fixed to the wire 4a. The first positioning member 6b is fixed to the wire 4b. The first positioning member 6c is fixed to the wire 4c. The first positioning member 6a, the first positioning member 6b, and the first positioning member 6c are arranged at a plurality of positions in the vertical direction. Specifically, the first positioning member 6b is disposed vertically below the first positioning member 6a, and the first positioning member 6c is disposed vertically below the first positioning member 6b. .

  As illustrated in FIG. 13, the tidal current power generation device 100A includes a turbine unit 2A that is different from the turbine unit 2 according to the above-described embodiment. The turbine unit 2A includes a second positioning member 5a, a second positioning member 5b, and a second positioning member 5c. For example, the second positioning member 5 a, the second positioning member 5 b, and the second positioning member 5 c are fixed to the turbine case 20. The second positioning member 5a, the second positioning member 5b, and the second positioning member 5c are arranged at a plurality of positions in the vertical direction. Specifically, the second positioning member 5b is disposed vertically below the second positioning member 5a, and the second positioning member 5c is disposed vertically below the second positioning member 5b. .

  The vertical distance from the second positioning member 5a to the second positioning member 5b is equal to the vertical distance from the first positioning member 6a to the first positioning member 6b. Thereby, the second positioning member 5a is fitted to the first positioning member 6a, and at the same time, the second positioning member 5b is fitted to the first positioning member 6b. The vertical distance from the second positioning member 5b to the second positioning member 5c is equal to the vertical distance from the first positioning member 6b to the first positioning member 6c. Accordingly, the second positioning member 5b is fitted into the first positioning member 6b, and at the same time, the second positioning member 5c is fitted into the first positioning member 6c.

  As described above, in the tidal current power generation device 100A according to the first modification, the plurality of first positioning members (the first positioning member 6a, the first positioning member 6b, and the first positioning member 6c) have a plurality of positions in the vertical direction. Is arranged.

  Accordingly, the second positioning members (second positioning member 5a, second positioning member 5b, and second positioning member 5c) are moved to the first positioning members (first positioning member 6a, first positioning member 6b) at a plurality of positions in the vertical direction. And the first positioning member 6c). For this reason, even if the turbine unit 2A receives an ocean current, it becomes difficult to swing. Specifically, in the turbine unit 2A, movement in a direction that forms an angle with respect to a vertical plane (a plane parallel to the paper surface in FIG. 13) including a plurality of wires (wire 4a, wire 4b, and wire 4c) is suppressed. . For this reason, it becomes difficult for the kinetic energy of the ocean current to be consumed by the oscillation of the turbine unit 2A. Therefore, stable power generation can be performed.

(Modification 2)
FIG. 14 is a schematic diagram illustrating a tidal current power generation device according to the second modification. 15 is a view taken in the direction of arrow E in FIG. Note that the same components as those described in the above-described embodiment are denoted by the same reference numerals, and redundant description is omitted.

  As shown in FIG. 14, the tidal current power generation device 100B according to Modification 2 includes a wire 4d, a wire 4e, a wire 4f, a first positioning member 6d, a first positioning member 6e, and a first positioning member 6f. . Each of the wire 4d, the wire 4e, and the wire 4f connects the support member 8 and the anchor 3 with the shortest distance. The wire 4d, the wire 4e, and the wire 4f are arranged on the same straight line in a plan view. The first positioning member 6d is fixed to the wire 4d. The first positioning member 6e is fixed to the wire 4e. The first positioning member 6f is fixed to the wire 4f. The first positioning member 6d, the first positioning member 6e, and the first positioning member 6f are arranged at a plurality of positions in the vertical direction. Specifically, the first positioning member 6e is disposed on the lower side in the vertical direction than the first positioning member 6d. The vertical position of the first positioning member 6f is the same as the vertical position of the first positioning member 6d.

  As shown in FIG. 15, the tidal current power generation apparatus 100B includes a turbine unit 2B that is different from the turbine unit 2 according to the above-described embodiment. The turbine unit 2B includes a second positioning member 5d, a second positioning member 5e, and a second positioning member 5f. For example, the second positioning member 5 d and the second positioning member 5 f are fixed to the generator 22. For example, the second positioning member 5 e is fixed to the turbine case 20. The second positioning member 5d, the second positioning member 5e, and the second positioning member 5f are arranged at a plurality of positions in the vertical direction. Specifically, the second positioning member 5e is disposed on the lower side in the vertical direction of the second positioning member 5d and the second positioning member 5f. The vertical position of the second positioning member 5f is the same as the vertical position of the second positioning member 5d.

  The vertical distance from the second positioning member 5d to the second positioning member 5e is equal to the vertical distance from the first positioning member 6d to the first positioning member 6e. As a result, the second positioning member 5d is fitted into the first positioning member 6d, and at the same time, the second positioning member 5e is fitted into the first positioning member 6e. Further, since the first positioning member 6d and the first positioning member 6f are at the same position in the vertical direction, and the second positioning member 5d and the second positioning member 5f are at the same position in the vertical direction, the second positioning member 5d is At the same time that the first positioning member 6d is fitted, the second positioning member 5f is fitted to the first positioning member 6f.

  As described above, in the tidal current power generation device 100B according to Modification 2, there are three first positioning members (a first positioning member 6d, a first positioning member 6e, and a first positioning member 6f). The positions of the two first positioning members (the first positioning member 6d and the first positioning member 6f) are the same in the vertical direction, and are vertically higher than the other first positioning member (the first positioning member 6e). It is.

  As a result, the turbine unit 2B is less likely to swing. For this reason, consumption of the kinetic energy of the ocean current due to the swing of the turbine unit 2B is further suppressed. Therefore, more stable power generation can be performed.

DESCRIPTION OF SYMBOLS 10 Transmission line 100, 100A, 100B Tidal current power generation apparatus 11 Ship 12 Rope 2, 2A, 2B Turbine unit 20 Turbine case 201 Vertical member 202, 203, 204, 205 Horizontal member 21 Turbine 22 Generator 23 Float 3 Anchor 4, 4a, 4b, 4c, 4d, 4e, 4f Wire 5, 5a, 5b, 5c, 5d, 5e, 5f Second positioning member 51 Connection portion 52 Disk portion 53 Conical portion 54 Slit 6, 6a, 6b, 6c, 6d, 6e, 6f First positioning member 61 Auxiliary member 62 Hole 63 Recess 8 Support member 9 Bridge 91 Bridge pier

Claims (5)

A support member supported by an offshore structure;
An anchor placed on the seabed,
A wire connecting the support member and the anchor;
A first positioning member fixed to the wire;
A turbine unit including a turbine, a second positioning member that can be attached to and detached from the wire and fitted to the first positioning member, and a float that can adjust its own weight;
A tidal current power generation device comprising:   The tidal current power generation device according to claim 1, wherein the second positioning member includes a slit having a width equal to or larger than the outer diameter of the wire.   The tidal current power generator according to claim 1 or 2, comprising a plurality of the wires, the first positioning members, and the second positioning members.   The tidal power generation device according to claim 3, wherein the plurality of first positioning members are arranged at a plurality of positions in the vertical direction. There are three first positioning members,
5. The tidal current power generation device according to claim 3, wherein the positions of the two first positioning members are the same in the vertical direction and are vertically higher than the other first positioning member.

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