JP5804752B2 - Floating body - Google Patents

Description

  The present invention relates to a floating body that is supported so as to float on the ocean and on which a structure can be erected.

  Due to the difficulty of securing land due to environmental problems and economic reasons, in recent years, there has been an increasing need to install wind turbines and wind power generators on a floating body and distribute them on the ocean. As such a tower-like structure support floating body, there exists what was described in the following patent document 1, for example.

  The tower-like structure support floating body described in Patent Document 1 has a wind turbine standing on the top of a box-shaped floating body, and the upper end of a support pillar is suspended and fixed to the bottom of the floating body. A weight is attached to the lower end of the column, so that the overall center of gravity height can be positioned lower than the water surface while being positioned in the vicinity of the water surface without significantly reducing the overall floating height. .

JP 2001-063684 A

  In the conventional tower-like structure supporting floating body described above, the lower part of the floating body is submerged, and the wind power generator is erected on the upper part. For this reason, it is not possible to install a plurality of windmills on the floating body, and the power generated by the windmills is transmitted to the onshore power storage device via a cable laid on the seabed, increasing the cost of cable laying work on the seabed. There is a problem of end up. In this case, when a plurality of wind turbine generators are installed on a conventional floating body, the floating body becomes unstable and it is difficult to perform stable power generation. In addition, since the wind power generator on the floating body and the on-shore power storage device are connected by a cable laid on the seabed, it is difficult to evacuate the power generator with the floating body even if a hurricane occurs. It is.

  The present invention solves the above-described problems, and an object thereof is to provide a floating body that can suppress swinging and can simplify the structure.

  In order to achieve the above object, a floating body of the present invention includes a floating body main body on which a structure can be erected on an upper surface portion, and a dynamic vibration absorber provided on the floating body main body to suppress swinging of the floating body main body. The dynamic vibration absorber is provided at each end of the rotating member in the longitudinal direction, and a rotating member whose middle part in the longitudinal direction is rotatably supported by a support shaft horizontal to the floating body main body. A pair of weights, a biasing member that biases and supports the rotating member at a predetermined rotational position, and a damper that absorbs kinetic energy generated by relative movement between the floating body and the rotating member. It is characterized by having.

  Therefore, when the floating body is about to swing due to waves or the like, the dynamic vibration absorber is activated to suppress this swinging. In other words, the rotating member with weights attached to both ends relative to the direction in which the floating body is about to swing suppresses the swinging by rotating in the opposite direction around the support shaft. The rotating member is restored to a predetermined rotating position by the biasing member, and the kinetic energy generated by the relative movement with the floating body is absorbed by the damper, so that the swinging of the floating body is appropriately suppressed. In addition, it is possible to simplify the structure.

  In the floating body of the present invention, the floating body has a hollow shape, and the dynamic vibration absorber is disposed therein.

  Therefore, by accommodating the dynamic vibration absorber in the floating body body, the floating body can be made compact, and a waterproof measure for the dynamic vibration absorber can be easily taken.

  In the floating body of the present invention, the urging member and the damper are arranged between the floating body main body and the rotating member.

  Therefore, the structure can be simplified by disposing the urging member and the damper between the floating body main body and the rotating member.

  In the floating body of the present invention, the urging member and the damper are arranged symmetrically on each end side in the longitudinal direction with respect to the rotation center of the rotation member.

  Therefore, by arranging the urging member and the damper symmetrically with respect to the rotation center of the rotating member, the rotating member can be properly restored by the urging member, and the kinetic energy generated by the damper is appropriately adjusted. Can be absorbed into.

  In the floating body of the present invention, the dynamic vibration absorbers are arranged along horizontal directions orthogonal to each other in the floating body.

  Therefore, rolling and pitching of the floating body can be suppressed by disposing the plurality of dynamic vibration absorbers along the horizontal direction perpendicular to each other in the floating body.

  In the floating body of the present invention, the structure is a plurality of wind power generators, and a power storage device that stores electric power generated by the wind power generator is provided in the floating body.

  Therefore, even if a plurality of wind power generators are erected on the floating body, the swinging of the floating body can be properly suppressed, and a cable is laid between the land and the power storage device on the floating body. This eliminates the need to do this, and can reduce the operating cost.

  According to the floating body of the present invention, the floating body main body is provided with a dynamic vibration absorber that suppresses swinging, and as the dynamic vibration absorber, a rotating member that is rotatably supported by a horizontal support shaft, and the rotation Kinetic energy generated by relative movement of a pair of weights provided at each end of the member in the longitudinal direction, a biasing member that biases and supports the rotating member at a predetermined rotating position, and the floating body main body and the rotating member Accordingly, the swinging of the floating body can be appropriately suppressed and the structure can be simplified.

FIG. 1 is a schematic diagram illustrating a floating body according to Embodiment 1 of the present invention. FIG. 2 is a schematic diagram illustrating a dynamic vibration absorber in the floating body according to the first embodiment. FIG. 3 is a perspective view illustrating a floating body in which a wind turbine generator is erected on the top of the first embodiment. FIG. 4 is a schematic diagram illustrating a floating body according to Embodiment 2 of the present invention.

  Exemplary embodiments of a floating body according to the present invention will be described below in detail with reference to the accompanying drawings. In addition, this invention is not limited by this Example, Moreover, when there exists multiple Example, what comprises combining each Example is also included.

  1 is a schematic diagram illustrating a floating body according to a first embodiment of the present invention, FIG. 2 is a schematic diagram illustrating a dynamic vibration absorber in the floating body according to the first embodiment, and FIG. 3 is a wind power generator at the top of the first embodiment. It is a perspective view showing the standing floating body.

  In the first embodiment, as shown in FIG. 3, the floating body 11 is configured by integrally connecting a first floating body 12 and a second floating body 13 by connecting members 14 and 15. The floating body 11 (the first floating body 12 and the second floating body 13) has a plurality of wind power generators 21 and 22 standing on the upper surface thereof, and the wind power generators 21 and 22 generate power. A power storage device 23 for storing electric power is provided inside the floating body 11 (first floating body 12).

  The wind power generators 21 and 22 have substantially the same configuration, and are provided at the upper ends of the support bases 21a and 22a, the support columns 21b and 22b fixed along the vertical direction of the support tables 21a and 22a, and the support columns 21b and 22b. The rotary shafts 21c and 22c are rotatably supported, a plurality (three in this embodiment) of blades 21d and 22d fixed to the rotary shafts 21c and 22c, and generators 21e and 22e. . And generator 21e, 22e and the electrical storage apparatus 23 mentioned above are connected by the electric power cable which is not shown in figure.

  Further, the first and second floating bodies 12 and 13 constituting the floating body 11 are provided on the floating body main bodies 24a and 25a and the floating body main bodies 24a and 25a, and the dynamic vibration absorber for suppressing the swinging of the floating body main bodies 24a and 25a. 24b and 25b. In this case, since the first and second floating bodies 12 and 13 have substantially the same configuration, the first floating body 12 will be described in detail below.

  As shown in FIGS. 1 and 2, the first floating body 12 includes a floating body 24a and a dynamic vibration absorber 24b. The floating body 24 a has a box shape with a hollow portion 31 formed therein, and the dynamic vibration absorber 24 b is accommodated in the hollow portion 31.

  The dynamic vibration absorber 24 b includes a rotating member 41, a pair of weights 42, a pair of compression coil springs 43 as urging members, and a pair of dampers 44. That is, the floating body 24 a has a mounting bracket 51 fixed to the bottom surface 32 constituting the hollow portion 31, and a horizontal support shaft 52 is mounted on the mounting bracket 51. The rotating member 41 is a plate-like member having a predetermined length, and an intermediate portion in the longitudinal direction is supported by the support shaft 52 of the mounting bracket 51 so as to be vertically rotatable. In this case, the rotation member 41 is supported by the support shaft 52 at the intermediate position in the vertical direction in the hollow portion 31 of the floating body 24a.

  The rotating member 41 has a weight (weight) 42 fixed to each end in the longitudinal direction. Since the weight 42 has the same weight (mass), the rotating member 41 is maintained in a horizontal state in which the left and right weights (mass) are balanced.

  The rotating member 41 is located on both sides of the support shaft 52 as a fulcrum, and a compression coil spring 43 is interposed between the upper surface of the rotating member 41 and the ceiling surface 33 constituting the hollow portion 31. Since each compression coil spring 43 has the same urging force, the rotation member 41 is urged and supported at a horizontal rotation position.

  Further, the rotating member 41 has both sides of the support shaft 52 as a fulcrum and is adjacent to the outside of each compression coil spring 43, and a damper 44 is interposed between the upper surface and the ceiling surface 33. Yes. Each damper 44 is, for example, an air damper or an oil damper and has the same configuration. The damper 44 can absorb the kinetic energy generated by the relative movement between the floating body 24a and the rotating member 41.

  In this case, the compression coil spring 43 and the damper 44 are disposed between the floating body 24a and the rotation member 41, and symmetrically to each end in the longitudinal direction with respect to the rotation center of the rotation member 41. Will be placed. And the distance from the rotation center (support shaft 52) of the rotation member 41 to the weight 42, the compression coil spring 43, and the damper 44, the mass of the rotation member 41 and the weight 42, and the natural frequency of the rotation member 41 The damping performance of the damper 44 is set to an appropriate value according to the shape (eigenvalue) of the floating body 11.

  Accordingly, as shown in FIGS. 1 to 3, the floating body 11 having the two wind power generators 21 and 22 standing on the upper side is moored so as to float at a predetermined position on the ocean. By operating the power generators 21 and 22, the generators 21e and 22e generate power, and the generated power is stored in the power storage device 23 of the first floating body 12 through the power cable.

  At this time, the floating body 11 tries to swing due to waves or the like, but the swinging is suppressed by the operation of each of the dynamic vibration absorbers 24b and 25b. That is, for example, in FIG. 2, the rotating member 41 having the weights 42 attached to both ends thereof rotates in the opposite direction with respect to the direction in which the floating body 24 a is about to swing. Thus, the swinging of the floating body 24a is suppressed. That is, when the floating body 24a attempts to rotate in the clockwise direction in FIG. 2, the rotation member 41 relatively rotates in the counterclockwise direction, thereby suppressing the swinging of the floating body 24a. Due to the continuous relative rotation between the floating body 24a and the rotating member 41, the wind turbine generators 21 and 22 can be maintained in an appropriate standing state without the floating body 24a swinging with respect to the waves.

  Further, after the rotation member 41 moves relative to the floating body 24a, the rotation member 41 is restored to a predetermined rotation position (horizontal position with respect to the floating body 24a) by the urging force of the compression coil spring 43, whereby the floating body 24a. Is properly suppressed. Further, the rotation member 41 is suppressed from generating vibrations or the like in the rotation member 41 by absorbing the kinetic energy generated by the relative movement with the floating body 24 a by the damper 44.

  As described above, in the floating body of the first embodiment, the floating body main bodies 24a and 25a on which the wind power generators 21 and 22 can be erected on the upper surface portion, and the movement provided to the floating body main bodies 24a and 25a to suppress the swinging. And a vibration member 24b, 25b, and as the dynamic vibration absorbers 24b, 25b, a rotating member 41 whose longitudinal intermediate portion is supported by a floating support body 52a and a horizontal support shaft 52 so as to be vertically rotatable. A pair of weights 42 provided at each end of the rotating member 41 in the longitudinal direction, a compression coil spring 43 that biases and supports the rotating member 41 at a predetermined rotating position, the floating body bodies 24a and 25a, and the rotating member A damper 44 that absorbs kinetic energy generated by relative movement with respect to 41 is provided.

  Therefore, when the floating body 24a, 25a tries to swing due to waves or the like, the dynamic vibration absorbers 24b, 25b are operated to suppress this swing. That is, with respect to the direction in which the floating body 24a, 25a is about to swing, the rotating member 41 having the weights 42 attached to both ends thereof swings in the opposite direction with the support shaft 52 as a fulcrum. At this time, the rotation member 41 is restored to the predetermined rotation position by the compression coil spring 43, and the kinetic energy generated by the relative movement with the floating body 24a, 25a is absorbed by the damper 44. Thus, the swinging of the floating body 24a, 25a can be appropriately suppressed. Further, since the dynamic vibration absorbers 24b and 25b are constituted by the rotating member 41, the weight 42, the compression coil spring 43, and the damper 44, the structure can be simplified.

  Moreover, in the floating body of Example 1, the floating body main bodies 24a and 25a are made into a hollow shape, and the dynamic vibration absorbers 24b and 25b are disposed therein. Therefore, the dynamic vibration absorbers 24b and 25b are accommodated in the floating body main bodies 24a and 25a, so that the floating body 11 can be made compact, and a waterproof measure for the dynamic vibration absorbers 24b and 25b can be easily obtained. It can be carried out.

  In the floating body of the first embodiment, the compression coil spring 43 and the damper 44 are disposed between the floating body main bodies 24 a and 25 a and the rotating member 41. Therefore, the structure can be simplified.

  In the floating body of the first embodiment, the compression coil spring 43 and the damper 44 are arranged symmetrically on each end side in the longitudinal direction with respect to the rotation center (support shaft 52) of the rotation member 41. Therefore, the rotating member 41 can be properly restored by the compression coil spring 43, and the kinetic energy generated by the damper 44 can be properly absorbed.

  In the floating body of the first embodiment, a plurality of wind power generators 21 and 22 are provided on the floating body 11, and a power storage device 23 that stores the power generated by the wind power generators 21 and 22 is provided in the floating body main bodies 24 a and 25 a. Yes. Therefore, even if a plurality of wind power generators 21 and 22 are erected on the floating bodies 24a and 25a, the swinging of the floating bodies 24a and 25a can be appropriately suppressed, and the power storage device 23 is connected to the floating bodies 24a and 25a. By providing the cable, there is no need to lay a cable between the land and the operation cost can be reduced.

  FIG. 4 is a schematic diagram illustrating a floating body according to Embodiment 2 of the present invention. In addition, the same code | symbol is attached | subjected to the member which has the function similar to the Example mentioned above, and detailed description is abbreviate | omitted.

  In the second embodiment, as shown in FIG. 4, although the floating body 61 is not illustrated, a plurality of wind power generators as a structure are erected on the upper surface portion, and power storage for storing the power generated by the wind power generator A device is provided inside the floating body 61.

  The floating body 61 includes a floating body 62 and a plurality of dynamic vibration absorbers 63 (63a, 63b, 63c), 64 (64a, 64b) provided on the floating body 62 to suppress the swinging of the floating body 62. It is composed of In this case, the plurality of dynamic vibration absorbers 63 (63a, 63b, 63c), 64 (64a, 64b) have substantially the same configuration, but their arrangements are different.

  That is, the dynamic vibration absorbers 63a, 63b, and 63c and the dynamic vibration absorbers 64a and 64b are arranged along horizontal directions that are orthogonal to each other in the floating body 62. That is, the dynamic vibration absorbers 63a, 63b, 63c, 64a, and 64b are configured to include a compression coil spring and a damper (not shown) in addition to the rotating member 41 and the pair of weights 42. And in one dynamic vibration absorber 63a, 63b, 63c, the rotation member 41 is arrange | positioned along the horizontal X direction. Further, in the dynamic vibration absorbers 64a and 64b, the rotating member 41 is disposed along the horizontal Y direction orthogonal to the X direction.

  Accordingly, the floating body 61 with the wind power generator standing upright is moored so as to float at a predetermined position on the ocean. The wind power generator is activated by receiving the wind, and the generator generates power and generates power. The stored electric power is stored in the power storage device of the floating body 61 through the power cable.

  At this time, the floating body 61 tends to swing due to waves or the like, but the swinging is suppressed by the operation of the dynamic vibration absorbers 63 and 64. That is, with respect to the direction in which the floating body 62 tries to swing, the rotating member 41 with the weights 42 attached to both ends rotates in the opposite direction with the support shaft as a fulcrum. The movement is suppressed. Therefore, the proper standing state of the wind turbine generator can be maintained without the floating body 62 swinging with respect to the waves.

  Moreover, since each dynamic vibration absorber 63 and 64 is arrange | positioned along the direction orthogonal to a horizontal direction, rocking | fluctuation of the floating body 61 is suppressed with respect to the wave from two directions.

  Thus, in the floating body of Example 2, the floating body 62 is provided with a plurality of dynamic vibration absorbers 63 (63a, 63b, 63c), 64 (64a, 64b), and the dynamic vibration absorbers 63a, 63b, 63c and the dynamic vibration absorbers 63a, 63b, 63c. The vibration absorbers 64a and 64b are arranged along horizontal directions orthogonal to each other. Therefore, the plurality of dynamic vibration absorbers 63 (63a, 63b, 63c), 64 (64a, 64b) are respectively arranged along the horizontal direction perpendicular to each other in the floating body 62, thereby swinging the floating body 62 in two directions. That is, rolling and pitching can be suppressed.

  In the second embodiment, the plurality of dynamic vibration absorbers 63 and 64 are respectively arranged along the horizontal direction perpendicular to each other in the floating body 62. However, the arrangement direction and the number thereof are limited to this embodiment. Instead, it may be set appropriately in accordance with the offshore environment in which the floating body 61 is floating, that is, the direction in which the floating body 61 swings.

  In the above-described embodiment, the urging member is the compression coil spring 43. However, the urging member is not limited to this configuration, and may be a leaf spring, rubber, synthetic resin, or the like. Further, although the compression coil spring (biasing member) 43 and the damper 44 are arranged on both sides of the rotating member 41, they may be arranged only on one side.

  In the above-described embodiments, the wind power generators 21 and 22 are applied as structures. However, the present invention is not limited to this configuration. For example, a bridge pier, a power transmission tower, a rocket launch pad, and the like may be erected. .

DESCRIPTION OF SYMBOLS 11,61 Floating body 12 1st floating body 13 2nd floating body 21,22 Wind power generator (structure)
23 Power storage device 24a, 25a, 62 Floating body main body 24b, 25b Dynamic vibration absorber 41 Rotating member 42 Weight 43 Compression coil spring (biasing member)
44 Damper 52 Support shaft

Claims (5)

A floating body capable of standing a structure on the upper surface,
A dynamic vibration absorber provided in the floating body main body to suppress swinging of the floating body main body,
With
The dynamic vibration absorber is
A rotating member in which a middle part in the longitudinal direction is rotatably supported by a support shaft horizontal to the floating body;
A pair of weights provided at each end in the longitudinal direction of the rotating member;
A biasing member that biases and supports the pivoting member at a predetermined pivoting position;
A damper that absorbs kinetic energy generated by relative movement between the floating body and the rotating member;
I have a,
The floating body has a hollow shape, and the dynamic vibration absorber is disposed inside.
A floating body characterized by that. The floating body according to claim 1 , wherein the urging member and the damper are disposed between the floating body main body and the rotating member. The floating body according to claim 1 or 2 , wherein the urging member and the damper are arranged symmetrically on each end side in the longitudinal direction with respect to a rotation center of the rotation member. 4. The floating body according to claim 1 , wherein the dynamic vibration absorbers are arranged along horizontal directions orthogonal to each other in the floating body main body. 5. The structure is a plurality of wind power generation apparatus, according to any one of claims 1 4, characterized in that the power storage device to store electric power the wind power generator is generating is provided on the floating body body Floating body.

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