JP2019100187A - Ocean current and tidal current power generation device - Google Patents

Abstract

To provide a power generation device capable of generating power efficiently using ocean current or tidal current being natural energy.SOLUTION: A power generation device comprises: a sea water flow passage 6 penetrating through a box-shaped device body 1, and both end parts of which are opened to opposite side surfaces; a pair of rotary water turbines 8 oppositely arranged so as to hold an intermediate part of the sea water flow passage 6 therebetween, and in which a rotational shaft 9 is rotatably supported to a top plate 2 and a bottom plate 3, and a part of an impeller 10 externally fitted to the rotational shaft is positioned in the flow passage 6; and a dynamo 11 for generating power with rotation of the rotary water turbine 8.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a ocean current / tidal power generator that generates electricity using energy of ocean current and / or tidal current.

  In recent years, with the rapid increase of energy demand on a global scale, the risk of exhaustion and pollution as an alternative or newly added energy source of fossil fuel such as petroleum and LNG, which has been relied on exclusively until now, and energy sources such as nuclear power. Various research and development efforts are underway to use natural energy without

  As such natural energy, sunlight, wind power, etc. can be used, but all have the disadvantage that the output is stopped or fluctuates greatly depending on time or season. On the other hand, especially in Japan, although the area is small, since the surroundings are surrounded by the sea, it is possible to generate electricity using ocean currents and tidal currents that are infinite and have a high energy density. It can be used as a powerful energy source that is not influenced by

  As a power generator using this kind of energy of ocean current and tidal current, one disclosed in Patent Document 1 below is known.

JP-A-7-259064

  This invention is made in view of such a situation, and makes it a subject to provide an electric power generating device which can generate electric power efficiently using natural current and ocean current and / or tidal current. .

  In order to solve the above problems, the ocean current and tidal power generator according to the present invention as set forth in claim 1 comprises a box-like device body in which a side surface is formed between a top plate and a bottom plate; And the seawater flow passage opened at the side face opposite to the opposite end, and the sandwich flow passage disposed opposite to each other with the intermediate portion between the openings in the seawater flow passage interposed therebetween, and the rotation axis is rotatable between the top plate and the bottom plate It is characterized by comprising a pair of rotary water turbines in which a part of the impeller supported and mounted on the rotary shaft is located in the seawater flow path, and a generator that generates electric power by the rotation of these rotary water turbines. It is said that.

  The invention according to claim 2 is characterized in that, in the invention according to claim 1, a space between the inner cylinder and the outer cylinder coaxially arranged with the axis is provided at both ends in the axial direction of the rotary water wheel. The seawater discharged from the impeller is swirled in the axial direction by communicating between the blades and arranging a plurality of guide plates between the inner cylinder and the outer cylinder at intervals in the circumferential direction. It is characterized in that there is provided a drainage channel to be jetted out.

  The invention according to claim 3 is characterized in that, in the invention according to claim 2, the drainage passage between the inner and outer cylinders has a gradually increasing cross-sectional area orthogonal to the axis in the axial direction from the impeller side It is characterized in that it is formed as follows.

  The invention according to claim 4 relates to the invention according to claim 2 or 3, wherein the outer surface of at least one of the top plate and the bottom plate gradually extends from the opening side toward the outlet side of the drainage channel. It is characterized in that it is provided with an inclined guide plate which is separated from the top plate or the bottom plate and whose front end faces the drainage port.

  In the invention according to a fifth aspect, in the invention according to any one of the first to fourth aspects, in the side surfaces of the device main body, the width dimension between the side surfaces gradually increases from the opening side toward the intermediate portion side. It is characterized in that it is formed by an inclined surface which becomes large.

  The invention according to a sixth aspect is the invention according to any one of the first to fifth aspects, wherein a plurality of water guiding walls are spaced between the side surfaces between the opening and the rotary water wheel in the seawater flow path. It is characterized in that it is placed and placed.

  According to the invention as set forth in any one of claims 1 to 6, by installing the seawater flow path of the device main body in the sea with the direction along the ocean current, the pair of rotations by the seawater flowing into the seawater flow path The water wheel can be rotated to generate electricity by the generator. In addition, since a pair of rotary water turbines in which the impeller is integrated on the outer periphery of the rotary shaft is used as the drive means of the generator, the propeller blades are compared with the water turbine as shown in Patent Document 1 above. As a result, the manufacturing cost can be reduced and the power generation efficiency can be greatly improved. As a result, it is possible to efficiently generate power by using natural energy, such as ocean currents and tidal currents.

  Further, according to the invention of claim 2, since the drainage flow paths communicating between the blades of the impeller are provided at both end surfaces in the axial direction of the rotary water turbine, it is possible to use seawater which has rotated the rotary water turbine. By draining part of the water from the drainage channel, it is possible to attract the seawater around the main body of the device into the seawater channel by the diffuser effect to enhance the power generation efficiency.

  In addition, in the invention according to claim 3, since the sectional area of the drainage channel is formed so that the sectional area gradually increases in the axial direction from the impeller side, the drainage channel The above-mentioned diffuser effect can be enhanced by reducing the drainage resistance in the

  Furthermore, in the invention according to claim 4, the outer surface of at least one of the top plate and the bottom plate of the device body is gradually separated from the top plate or the bottom plate from the opening side of the seawater flow passage toward the outlet side of the drainage flow passage. Because the inclined guide plate is provided, upflow or downflow in the direction of flow away from the outlet by flowing along the inclined guide plate in the ocean current along the outer surface of the device body is generated, and the pressure on the outlet side Similarly, the drainage from the drainage channel can be promoted to reduce the diffuser effect.

  Further, according to the invention as set forth in claim 5, the side surface of the device body is formed by an inclined surface in which the width dimension between the side surfaces gradually increases from the opening side toward the middle portion side. It is possible to increase the power generation output by incorporating the impeller of the impeller having a relatively large outside diameter without increasing the size of the main body.

  In addition, as in the invention according to claim 4, when the inclined guide plate is provided on the outer surface of the apparatus main body, the width dimension of the inclined guide plate facing the drainage port of the impeller can be formed large. become. As a result, a large upflow or downflow away from the outlet of the impeller can be generated by the inclined guide plate, and the diffuser effect described above can be further improved.

  In the invention according to claim 6, the plurality of water guiding walls are arranged at intervals between the side surfaces between the opening of the seawater flow passage in the device main body and the rotary water turbine, so The water conveyance wall can rectify and stably guide the seawater flowing into the seawater flow path to the impeller, and can prevent damage to the blades of the rotary water turbine due to the drifting material entrained in the ocean current.

1 is a perspective view showing an embodiment of the present invention. It is a top view of FIG. It is a front view of FIG. It is a side view of FIG. It is AA sectional view taken on the line of FIG. It is a BB sectional view taken on the line of FIG. It is a disassembled perspective view of the rotary water turbine of FIG. 1, and a drainage apparatus. It is a top view which shows other embodiment of this invention.

FIGS. 1 to 7 show an embodiment in which the ocean current / tidal power generator according to the present invention is applied mainly to an ocean current generator, and reference numeral 1 in the drawings denotes the main body of the ocean current / tidal generator.
The apparatus body 1 is formed in a rectangular box-like box shape in which the side surface 4 is formed between the top plate 2 and the bottom plate 3, and openings 5 are formed at both end portions in the longitudinal direction. And in this apparatus main body 1, the seawater flow path 6 penetrated between the openings 5 is formed.

  The seawater flow path 6 is defined by the inner wall 7 provided in the apparatus main body 1 and is formed so that the cross-sectional area at the central portion between the openings 5 is smaller than the cross-sectional area at the opening 5 side. ing. Moreover, the recessed part 7a is formed in the said center part of the inner wall 7, respectively, and the rotary water wheel 8 sandwiches the seawater flow path 6 in each recessed part 7a, and is arrange | positioned. Furthermore, a ballast tank 19 defined by the top plate 2, the bottom plate 3 and the inner wall 7 is formed in the device body 1.

  The above-mentioned rotary water wheel 8 is a known one in which an impeller 10 is provided on the outer periphery of a rotary shaft 9 and both ends of the rotary shaft 9 are rotatably supported on the top plate 2 and the bottom plate 3 respectively. The generator 11 is connected to. Further, a plurality of water guiding walls 12 are disposed at intervals between the side surfaces 4 between the opening 5 and the rotary water wheel 8 in the seawater flow passage 6.

  On the other hand, the inner cylinder 14 including the generator 11 and the inner cylinder 14 are surrounded at the central portion of the top plate 2 and the bottom plate 3 and at the positions facing the both end surfaces of the impeller 10 of the rotary water wheel 8 The drainage device 13 of the double pipe structure provided with the outer cylinder 15 is being fixed. Here, the inner cylinder 14 has an inner diameter slightly smaller than the inner peripheral end of the blade 10 a of the impeller 10, and the outer cylinder 15 has an inner diameter slightly larger than the outer peripheral end of the blade 10 a. Thus, a drain passage 16 communicating between the blades 10 a of the impeller 10 is formed between the inner and outer cylinders 14 and 15.

  Further, the inner cylinder 14 is formed in a conical shape in which the outer diameter dimension gradually decreases from the impeller 10 side toward the tip end side, and the outer cylinder 15 is gradually outward from the impeller 10 side toward the tip end side The drain passage 16 is formed so that the cross-sectional area orthogonal to the above-mentioned axis line gradually increases from the impeller 10 side toward the axial direction. .

  Further, between the inner cylinder 14 and the outer cylinder 15, a plurality of guide plates 17 for swirling and discharging the seawater discharged from the impeller 10 in the axial direction are disposed at intervals in the circumferential direction.

  Furthermore, on the outer surface of the top plate 2 and the bottom plate 3, there is provided an inclined guide plate 18 which is gradually separated from the top plate 2 or the bottom plate 3 from the both openings 5 side of the device body 1 toward the outlet side of the drainage device 13. ing. The inclined guide plates 18 are provided at positions where the front end edge 18a faces the drainage port at a position slightly higher than the outer cylinder 15, and are formed in a V shape in plan view.

  In order to generate electric power by the ocean current / tidal power generation apparatus having the above configuration, anchors are attached to the four corners of the apparatus main body 1 and water is injected into the ballast tank 19 so that the seawater flow path 6 becomes along the ocean current. Stabilize the body 1 in the sea and install it. Then, the seawater that has flowed into the seawater channel 6 from the one opening 5 of the device main body 1 has the cross-sectional area of the seawater channel 6 smaller than the opening 5 side, while increasing the flow velocity. It flows to the central portion side to rotate the impeller 10 of the rotary water wheel 8. As a result, power is generated by the generator 11 connected to the rotation shaft 9 of the rotary water turbine 8.

  Under the present circumstances, in this ocean current and tidal current power generation device, drainage device 13 provided with drainage channel 16 communicated between blades 10a of impeller 10 on both end surfaces (that is, upper and lower end surfaces) of rotary water turbine 8 in the axial direction. As a result, a portion of the seawater that has rotated the impeller 10 of the rotary water turbine 8 is drained upward and downward as a primary swirl flow from the drainage passage 16 between the inner and outer cylinders 14 and 15.

  In addition to this, in this ocean current / tidal power generator, the top plate 2 or bottom plate 3 is gradually extended from the opening 5 side to the outlet side of the drainage channel 16 on the outer surface of the top plate 2 and bottom plate 3 of the device body 1. Due to the provision of the inclined guide plate 18 which is separated from the surface of the apparatus, the secondary current and secondary downward flow which flow upward and downward from the tip of the inclined guide plate 18 are formed by the ocean current along the outer surface of the device body 1.

  As a result, the upward primary swirling flow and the downward primary swirling flow discharged from the drainage device 13 are sucked and the drainage from the drainage flow path 16 is promoted. As a result, seawater around the device main body 1 is produced by the diffuser effect. Can be drawn into the seawater flow path 6 to enhance the power generation efficiency of the rotary water turbine 8.

  Furthermore, according to the above-mentioned ocean current and tidal current power generation apparatus, since a pair of rotating water wheels 8 in which the impeller 10 is integrated on the outer periphery of the rotating shaft 9 is used as drive means for the generator By using the same one, it is possible to use common parts with each other, thus reducing the manufacturing cost and increasing the power generation efficiency as compared with the case of using a conventional propeller-bladed generator. .

  Since a plurality of water guiding walls are arranged at intervals between the side surfaces between the opening of the seawater flow path in the device main body and the rotary water wheel, the water flowing into the seawater flow path is rectified by the water guiding wall. As a result, it is possible to stably guide the impeller to the impeller and prevent the drifting material entrained in the ocean current from flowing to the rotary turbine side, thereby preventing damage to the blades.

  In the above embodiment, only the case where the ocean current / tidal power generation apparatus according to the present invention is applied to an ocean current power generation apparatus has been described, but the present invention is provided, for example, between the inner and outer cylinders 14 and 15 of the drainage apparatus 13 The present invention can also be applied to a tidal power generator that generates electricity by tidal tide four times a day by removing the guide plate 17.

  In this case, as shown in FIG. 6, the rotary water turbine 8 and the inner cylinder 14 of the drainage device 13 covering the generator 11 attached to the rotary shaft 9 of the rotary water turbine 8 can be removed by bolts and nuts. If provided, it is possible to integrally remove the above-mentioned rotary water wheel 8 and the generator 11 and replace it with a new one, and it is possible to perform these maintenance in a short period of time.

  Furthermore, as in the other embodiment shown in FIG. 8, the side surface 20 of the apparatus main body 1 is formed by an inclined surface in which the width dimension between the side surfaces 20 gradually increases from the inlet side to the middle portion side of the seawater channel 6. If formed, the outer diameter of the rotary water turbine 21 is made relatively larger than the outer diameter of the rotary water turbine 8 shown in FIGS. 1 to 7 without excessively enlarging the device body 1. This makes it possible to increase power generation output as a result.

DESCRIPTION OF SYMBOLS 1 apparatus main body 2 top plate 3 bottom plate 4 20 side 5 opening 6 seawater flow path 8 21 rotating water wheel 9 rotating shaft 10 impeller 10a blade 11 generator 12 water conveyance wall 13 drainage apparatus 14 inner cylinder 15 outer cylinder 16 drainage flow channel 17 guide plate 18 inclined guide plate 19 ballast tank

To solve the above problems, ocean current, tidal current power generator according to the present invention of claim 1 includes a box-shaped apparatus main body side is formed between the top plate and the bottom plate, the apparatus main body through a seawater flow path forming an opening in the through-direction end portions of the apparatus main body Te, a portion of the armored impeller to the rotating shaft with the rotating shaft is rotatably supported on a the top plate and the bottom plate A pair of rotary water turbines positioned in the seawater flow path, a generator for generating electricity by rotation of the rotary water turbines, and drainage devices provided at both axial ends of the rotary water turbines; An inner cylinder and an outer cylinder arranged coaxially with the axis, a drainage passage formed between the inner cylinder and the outer cylinder and communicating between the blades of the impeller, and a circumference of the drainage passage And a plurality of guide plates arranged at intervals in the direction, Seawater discharged from and is characterized in Rukoto is ejected to pivot the axial direction.

Invention according to claim 2, in the invention described in claim 1, the upper Symbol drain passage is formed as the cross-sectional area perpendicular to the axis is gradually increased toward the axial direction from the impeller side It is characterized by being.

The invention according to claim 3 is characterized in that, in the invention according to claim 1 or 2 , the outer surface of at least one of the top plate and the bottom plate gradually extends from the opening side toward the outlet side of the drainage channel. It is characterized in that it is provided with an inclined guide plate which is separated from the top plate or the bottom plate and whose front end faces the drainage port.

The invention according to a fourth aspect is the invention according to any one of the first to third aspects, wherein the side surface of the device main body has a width dimension between the side surfaces from the opening side to the opening in the seawater flow path It is characterized in that it is formed by an inclined surface which becomes gradually larger toward the middle part side of.

The invention according to a fifth aspect is the invention according to any one of the first to fourth aspects, wherein a plurality of water guiding walls are spaced between the side surfaces between the opening and the rotary water wheel in the seawater flow path. It is characterized in that it is placed and placed.

According to the invention as set forth in any one of claims 1 to 5 , by installing the seawater flow path of the device main body in the sea with the direction along the ocean current, the pair of rotations by the seawater flowing into the seawater flow path The water wheel can be rotated to generate electricity by the generator. In addition, since a pair of rotary water turbines in which the impeller is integrated on the outer periphery of the rotary shaft is used as the drive means of the generator, the propeller blades are compared with the water turbine as shown in Patent Document 1 above. As a result, the manufacturing cost can be reduced and the power generation efficiency can be greatly improved. As a result, it is possible to efficiently generate power by using natural energy, such as ocean currents and tidal currents.

Further, according to the invention as set forth in claim 1 , since the drainage flow paths communicating between the blades of the impeller are provided at both end surfaces in the axial direction of the rotary water turbine, it is possible to use seawater which rotates the rotary water turbine. By draining part of the water from the drainage channel, it is possible to attract the seawater around the main body of the device into the seawater channel by the diffuser effect to enhance the power generation efficiency.

In addition, in the invention according to claim 2 , since the sectional area of the drainage channel is formed so that the sectional area gradually increases in the axial direction from the impeller side, the drainage channel The above-mentioned diffuser effect can be enhanced by reducing the drainage resistance in the

Furthermore, in the invention according to claim 3 , the outer surface of at least one of the top plate and the bottom plate of the device body is gradually separated from the top plate or the bottom plate from the open side of the seawater flow passage toward the outlet side of the drainage flow passage. Because the inclined guide plate is provided, upflow or downflow in the direction of flow away from the outlet by flowing along the inclined guide plate in the ocean current along the outer surface of the device body is generated, and the pressure on the outlet side Similarly, the drainage from the drainage channel can be promoted to reduce the diffuser effect.

Further, according to the invention described in claim 4 , the side surface of the device main body is formed by an inclined surface in which the width dimension between the side surfaces gradually increases from the opening side toward the middle portion side. It is possible to increase the power generation output by incorporating the impeller of the impeller having a relatively large outside diameter without increasing the size of the main body.

In addition, as in the invention according to claim 3 , when the inclined guide plate is provided on the outer surface of the apparatus main body, the width dimension of the inclined guide plate facing the drainage port of the impeller can be formed large. become. As a result, a large upflow or downflow away from the outlet of the impeller can be generated by the inclined guide plate, and the diffuser effect described above can be further improved.

In the fifth aspect of the present invention, the plurality of water guiding walls are arranged at intervals between the side surfaces between the opening of the seawater flow path in the device main body and the rotary water turbine, The water conveyance wall can rectify and stably guide the seawater flowing into the seawater flow path to the impeller, and can prevent damage to the blades of the rotary water turbine due to the drifting material entrained in the ocean current.

Claims (6)

  A box-shaped device body having side surfaces formed between a top plate and a bottom plate, a seawater flow passage which penetrates the interior of the device body and is opened at the side surface opposite to the opposite end, and the opening in the seawater flow passage The rotary shaft is rotatably supported by the top plate and the bottom plate with the intermediate portion interposed therebetween, and a part of the impeller externally mounted on the rotary shaft is positioned in the seawater flow path. What is claimed is: 1. A ocean current / tidal power generation apparatus comprising: a pair of rotating water turbines; and a generator that generates electricity by rotation of the water turbines.   A plurality of guides between the inner cylinder and the outer cylinder are communicated between the inner cylinder and the outer cylinder disposed coaxially with the axis at both axial end portions of the rotary water wheel and between the blades of the impeller. A plate is provided at intervals in the circumferential direction, and a drainage flow path is provided for swirling and discharging the seawater discharged from the impeller in the axial direction. The ocean current and tidal power generator described in.   The said drainage flow path between the said inner and outer cylinders is formed so that the cross-sectional area orthogonal to the said axis line may become large gradually toward the said axial direction from the said impeller side. Ocean current / tidal power generator.   On the outer surface of at least one of the top plate and the bottom plate, there is provided an inclined guide plate which is gradually separated from the top plate or the bottom plate from the opening side toward the drainage port side of the drainage channel and whose tip faces the drainage port. The ocean current and tidal power generator according to claim 2 or 3, characterized in that   5. The apparatus according to any one of claims 1 to 4, wherein the side surface of the apparatus main body is formed by an inclined surface whose width between the side surfaces gradually increases from the opening side toward the middle portion side. Description of ocean current and tidal power generator.   The water guiding wall according to any one of claims 1 to 5, wherein a plurality of water guiding walls are arranged at intervals between the side surfaces between the opening and the rotary water wheel in the seawater flow passage. Ocean current / tidal power generator.

Images