JP2020176604A - Turbine and tidal power generator comprising the same - Google Patents

Abstract

To provide a turbine that rotates with flow of fluid, wherein the turbine rotates efficiently even in a case where the flow is low in speed and the direction of the flow changes over time.SOLUTION: A turbine 1 comprises: a rotational shaft 2, rotary plates 3 (3A, 3B) that rotate integrally with the rotational shaft 2, and a plurality of guide plates 4 (4A to 4H) fixed to the rotary plates 3 (3A, 3B) along a circumferential direction of the rotational shaft 2 on the outer peripheral side of the rotational shaft 2. Each of the plurality of guide plates 4 (4A to 4H) is arranged so as to be separated from the rotational shaft 2 in a radial direction of the rotational shaft 2. In the rotational shaft 2, a cross section S orthogonal to an axial direction of the rotational shaft 2 is circular. Fluid F flows along an outer circumference C while contacting the outer circumference C of the cross section S.SELECTED DRAWING: Figure 1

Description

The present invention relates to a turbine and a tidal power generation device that generates electricity by rotating a turbine using a tidal current (ocean current) generated by the tidal current.

Turbines are used in fluid power generation devices such as hydroelectric power generation devices and wind power generation devices, and are also used in tidal power generation devices, which are a type of this fluid power generation device. A tidal power generator is a power generator that uses the tidal current (ocean current) generated by the tide (a phenomenon in which the sea surface rises and falls periodically) to generate electricity. For example, Patent Document 1 below includes a water flow turbine, a seawater inlet / outlet pipe (housing) in which a water flow turbine is installed, and a water flow generator that generates electricity by rotating the water flow turbine, and seawater is a seawater inlet / outlet pipe. A tidal power generator is described in which a water flow turbine rotates by passing through the inside to generate electricity in a water flow generator.

By the way, in a tidal power generator, the direction of water flow inside the housing changes depending on the tidal power. For this reason, in a conventional tidal power generator, inside the housing, the turbine rotates alternately in one direction and in the opposite direction instead of continuously rotating in one direction. Therefore, the water stream is repeatedly used to start the turbine (rotate the turbine in a new direction), and the water stream cannot rotate the turbine efficiently.

Further, not only in the tidal power generation device but also in the wind power generation device, the flow direction of the fluid supplied to the turbine changes with the passage of time. However, in the wind power generation device, since the flow of the fluid supplied to the turbine is fast, it is easy to efficiently rotate the turbine even if the flow direction of the fluid changes. On the other hand, in a tidal power generator, the flow of fluid (seawater) supplied to the turbine is slow, so that it becomes difficult to efficiently rotate the turbine when the flow direction of the fluid changes.

Japanese Unexamined Patent Publication No. 2018-100657

Therefore, the present invention provides a turbine that rotates by the flow of a fluid, and that rotates efficiently even when the flow is low and the direction of the flow changes with the passage of time. The purpose is to do. Furthermore, it is also an object of the present invention to provide a tidal power generation device including such a turbine.

In order to solve the above problems, the present invention is a turbine that rotates by the flow of fluid, and the rotating shaft, a rotating plate that rotates integrally with the rotating shaft, and the rotating shaft on the outer peripheral side of the rotating shaft. A plurality of guide plates fixed to the rotating plate along the circumferential direction are provided, and each of the plurality of guide plates is arranged so as to be separated from the rotating shaft in the radial direction of the rotating shaft. The cross section orthogonal to the axial direction of the rotation axis is circular, and the fluid flows along the outer periphery while contacting the outer periphery of the cross section.

According to the turbine according to the present invention, since the cross section of the rotating shaft (the cross section orthogonal to the axial direction of the rotating shaft) is circular, the fluid flows in the circumferential direction of the rotating shaft along the outer periphery of the cross section. As a result, an inner circumferential flow, which is a flow of the fluid along the outer circumference in the circumferential direction of the rotation axis, is generated. Further, when a centrifugal force acts on the inner peripheral flow, a part of the inner peripheral flow travels toward the outer side in the radial direction of the rotation axis. Further, the inner circumferential flow that has progressed in this way generates an outer peripheral circulation that "flows while pressing the guide plate in the circumferential direction of the rotation axis". Then, the inner circumferential flow rotates the turbine by applying a frictional force and an inertial force to the rotating shaft in the circumferential direction of the rotating shaft. On the other hand, the outer peripheral circulation rotates the turbine by applying a pressing force to the guide plate in the circumferential direction of the rotation shaft. That is, according to the turbine according to the present invention, even when "the flow of the fluid used for rotating the turbine is slow" and "the direction of this flow changes with the passage of time", the inner circumference It can rotate efficiently by both circulation and outer circumference circulation.

Further, in the turbine, it is preferable that the guide plate is provided so as to be inclined in the circumferential direction with respect to the radial direction. As a result, the fluid supplied to the turbine flows along the guide plate from the radial outside to the inside of the rotating shaft, thereby giving a velocity component in the circumferential direction of the rotating shaft. Therefore, an inner peripheral flow can be efficiently generated from the fluid supplied to the turbine.

Further, in the turbine, the guide plate extends from the radial direction or the direction in which the guide plate is inclined in the circumferential direction with respect to the radial direction, and the radial inner end portion of the fluid inflow guide portion. It has an extending inner peripheral flow maintenance portion, and the inner peripheral flow maintenance portion has the radial central portion of the rotating shaft and the fluid inflow guide portion on a plane orthogonal to the axial direction of the rotating shaft. It is preferable that it extends in a direction orthogonal to the radial direction passing through the inner end portion in the radial direction. As a result, the rapid dispersion of the inner circulation (dispersion of the rotating shaft in the radial direction) can be suppressed by the inner circulation maintaining portion, and the flow rate of the fluid flowing as the inner circulation can be increased. Therefore, the turbine can be rotated more efficiently by the inner circumferential flow. The "rapid dispersion of the inner circulation" is the dispersion due to the action of centrifugal force on the inner circulation.

Further, in the turbine, the guide plate is formed from a fluid inflow guide portion extending in the radial direction or a direction inclined in the circumferential direction with respect to the radial direction, and a radial outer end portion in the fluid inflow guide portion. The outer peripheral circulation maintaining portion has an extending outer peripheral circulation maintaining portion, and the outer peripheral circulation maintaining portion has a radial center portion of the rotating shaft and the radial direction of the fluid inflow guide portion on a surface orthogonal to the axial direction of the rotating shaft. It preferably extends in a direction orthogonal to the radial direction passing through the outer end portion. As a result, the rapid dispersion of the outer peripheral circulation (dispersion of the rotating shaft to the outside in the radial direction) can be suppressed by the outer peripheral circulation maintaining portion, and the flow rate of the fluid flowing as the outer peripheral circulation can be increased. Therefore, the turbine can be rotated more efficiently by the outer peripheral circulation in the circumferential direction of the rotation shaft. The "rapid dispersion of the outer peripheral circulation" is the dispersion caused by the action of centrifugal force on the outer peripheral circulation.

Further, in the turbine, the guide plate extends from the radial direction or the direction in which the guide plate is inclined in the circumferential direction with respect to the radial direction, and the radial inner end portion of the fluid inflow guide portion. It has an extending inner circumferential flow maintenance portion and an outer peripheral circulation maintenance portion extending from the radial outer end portion of the fluid inflow guide portion, and the inner peripheral flow maintenance portion is orthogonal to the axial direction of the rotation axis. In the surface, the radial center portion of the rotation shaft and the radial inner end portion of the fluid inflow guide portion extend in a direction orthogonal to the radial direction, and the outer peripheral circulation maintenance portion is formed. On a surface orthogonal to the axial direction of the rotation axis, it extends in a direction orthogonal to the radial direction passing through the radial center portion of the rotation axis and the radial outer end portion of the fluid inflow guide portion. It is preferable to have. As a result, the "radial outward dispersion" of the outer peripheral circulation can be suppressed by the outer peripheral circulation maintaining portion, and the "diametrically inward dispersion" of the outer peripheral circulation can be suppressed by the inner peripheral circulation maintaining portion. Therefore, the pressing force can be efficiently applied to the guide plate by the outer peripheral circulation. The "dispersion of the outer peripheral circulation in the radial direction" is caused by the flow of the fluid supplied from the radial outer side to the inner side of the rotating shaft. Further, the "radial outward dispersion" of the outer peripheral circulation is caused by the action of centrifugal force on the outer peripheral circulation.

Further, in the turbine, the plurality of guide plates include an inner guide plate and an outer guide plate arranged outside the inner guide plate in the radial direction, and the outer side in the radial direction. The distance between the inner end of the guide plate and the rotating shaft is preferably longer than the distance between the outer end of the inner guide plate and the rotating shaft. As a result, in the circumferential direction of the rotating shaft, it is possible to further generate an inner circulating flow that passes between the inner guide plate and the outer guide plate, in addition to the inner circulating flow along the outer circumference of the rotating shaft. Therefore, a plurality of inner peripheral flows can be generated at different positions in the radial direction of the rotation shaft, and the turbine can be rotated more efficiently by utilizing the plurality of inner peripheral flows.

Further, the present invention is a tidal power generation device that generates power by utilizing the tidal current generated by the tide, and includes a turbine, a housing in which the turbine is installed, and a generator that generates power by rotating the turbine. The housing has a top plate, a bottom plate, a set of main inflow plates, a set of main outflow plates, side inflow plates, and side outflow plates, and the inside of the housing is provided. , A main inflow portion, a main outflow portion, a side inflow portion, and a side outflow portion are formed, and the main inflow portion is formed from the outside to the inside of the housing in a linear direction on a plane orthogonal to the axial direction of the turbine. It is a region where water flows in due to the tidal current, and is a region between the set of main inflow plates formed symmetrically with respect to the first straight line extending in the linear direction on the surface, and the main outflow portion is In the straight line direction, it is a region where water flows out from the inside of the housing to the outside, and is a region between the set of main outflow plates formed symmetrically with respect to the first straight line on the surface. The set of main inflow plates and the set of main outflow plates are formed symmetrically with respect to a second straight line orthogonal to the first straight line on the surface, and the side inflow portion is formed. It is a region where water flows from the outside to the inside of the housing by the tidal current in a direction inclined with respect to the linear direction on the surface, and is between one of the set of main inflow plates and the side inflow plate. The side outflow portion is a region in which water flows out from the inside of the housing to the outside in a direction inclined with respect to the linear direction on the surface, and is a region of the set of main outflow plates. It is a region between one side and the side outflow plate, and the side inflow plate and the side outflow plate are formed symmetrically with respect to the second straight line on the surface, and the turbine is described above. It is characterized by being one of the turbines.

According to the tidal power generation device according to the present invention, by providing the above-mentioned side inflow portion, the fluid flows into the housing from a direction different from the inflow direction of the fluid in the main inflow portion. As a result, tidal currents with different flow directions (flow of fluid flowing in from the main inflow part and flow of fluid flowing in from the side inflow part) merge inside the housing, and this merging causes the fluid to flow in various directions inside the housing. Dispersed to transfer power to the turbine. Therefore, it is possible to expand the range of locations where the force due to the tidal current is transmitted in the turbine by a simple method of forming the side inflow portion. Therefore, it is possible to obtain a power generation device that can be manufactured at low cost and can efficiently rotate a turbine to generate power.

On top of that, by providing the above-mentioned side outflow portion, the above-mentioned side outflow portion can function as the above-mentioned side outflow portion even when the flow direction of the fluid changes inside the housing due to the tide. As a result, it is possible to obtain a tidal power generation device that can be manufactured at low cost and can efficiently rotate a turbine to generate electricity. When the flow direction of the fluid changes inside the housing due to the tide, the above-mentioned main outflow portion can function as the above-mentioned main inflow portion.

Further, according to the tidal power generation device according to the present invention, the main inflow portion can be installed so as to efficiently generate the inner peripheral flow, and the side inflow portion can be installed so as to efficiently generate the outer peripheral circulation. That is, the optimum fluid supply direction to the turbine differs depending on whether the purpose is to efficiently generate the inner peripheral flow in the turbine or to efficiently generate the outer peripheral flow in the turbine. Therefore, conventionally, it has been difficult to supply the fluid to the turbine so as to achieve these two purposes at the same time. However, the tidal power generation device according to the present invention can achieve the above two objects at the same time by installing the main inflow section and the side inflow section having different fluid inflow directions, and fully exerts the function of the turbine according to the present invention. Can be made to. Therefore, according to the tidal power generation device according to the present invention, the turbine can be efficiently rotated by both the inner peripheral flow and the outer peripheral circulation, and power can be generated efficiently.

As described above, according to the turbine according to the present invention, when rotating due to the flow of fluid, the turbine rotates efficiently even when the flow is low and the direction of the flow changes with the passage of time. be able to. Furthermore, according to the tidal power generation device according to the present invention, it is possible to efficiently generate power by providing such a turbine.

It is a partially broken perspective view which shows the 1st Embodiment of the turbine which concerns on this invention. It is a schematic cross-sectional view of the turbine shown in FIG. It is a partially broken perspective view which shows the 2nd Embodiment of the turbine which concerns on this invention. It is a schematic cross-sectional view of the turbine shown in FIG. It is a schematic cross-sectional view which shows the 3rd Embodiment of the turbine which concerns on this invention. It is a schematic cross-sectional view which shows the 4th Embodiment of the turbine which concerns on this invention. It is a perspective view which shows one Embodiment of the tidal power generation apparatus which concerns on this invention. It is a schematic cross-sectional view of the tidal power generation apparatus shown in FIG. 7.

Next, a mode for carrying out the present invention will be described in detail with reference to the drawings.

First, the first embodiment of the turbine according to the present invention will be described. FIG. 1 is a partially cutaway perspective view showing a first embodiment of the turbine according to the present invention. FIG. 2 is a schematic cross-sectional view of the turbine shown in FIG. As shown in FIG. 1, the turbine 1 has a rotating shaft 2, a rotating plate 3 (3A, 3B) that rotates integrally with the rotating shaft 2, and a rotating shaft 2 on the outer peripheral side of the rotating shaft 2 in the circumferential direction of the rotating shaft 2. A plurality of guide plates 4 (4A to 4H) fixed to the rotating plates 3 (3A, 3B) are provided along the same. In addition, in FIG. 1, a part of the rotating plate 3A is broken.

As shown in FIG. 1, the rotating shaft 2 is formed in a columnar shape. Further, as shown in FIG. 2, the rotating shaft 2 is arranged so that the cross section S orthogonal to the axial direction of the rotating shaft 2 is circular. In the following, the "axial direction" means the axial direction of the rotating shaft 2. Further, the "diameter direction" means the radial direction of the rotating shaft 2. Further, the "plane direction" means a plane direction orthogonal to the axial direction of the rotation axis 2.

As shown in FIG. 1, the rotating plates 3 (3A, 3B) are both flat plate members formed in a disk shape. Further, the rotating plates 3 (3A, 3B) are fixed to the rotating shaft 2, respectively. Further, the rotating plates 3 (3A, 3B) are both arranged in the plane direction. The rotating plate 3A is fixed to one end (upper end) in the axial direction on the rotating shaft 2. On the other hand, the rotating plate 3B is fixed to the other end (lower end) in the axial direction on the rotating shaft 2.

As shown in FIG. 1, the guide plates 4 (4A to 4H) are flat plate members formed in a rectangular shape. Further, the guide plates 4 (4A to 4H) are fixed to the lower end of the rotary plate 3A and the upper end of the rotary plate 3B, and are arranged so as to extend axially between the lower end and the upper end. Further, as shown in FIG. 2, the guide plates 4 (4A to 4H) are provided so as to be inclined in the circumferential direction with respect to the radial direction. Each of the plurality of guide plates 4 (4A to 4H) is arranged so as to be separated from the rotation shaft 2 in the radial direction.

The operation of the turbine 1 shown in FIGS. 1 and 2 is as follows. First, the fluid F is supplied between the rotating plates 3A and 3B in an arbitrary linear direction in the plane direction (“direction from bottom to top” in the paper surface of FIG. 2). This fluid F flows from the radial outer side to the inner side of the rotating shaft 2 along the guide plate 4A. As a result, the guide flow g1 is generated along the guide plate 4A. Further, a part of the guide flow g1 travels along the outer circumference C of the rotation shaft 2 while contacting the outer circumference C of the rotation shaft 2 in the circumferential direction. Therefore, the inner circumferential flow i1 is generated in the circumferential direction along the outer peripheral C of the rotating shaft 2. The inner circumferential flow i1 applies a frictional force and an inertial force to the rotating shaft 2 in the circumferential direction.

Further, a centrifugal force acts on the inner circumferential flow i1, so that a part of the inner circumferential flow i1 travels outward in the radial direction. As a result, a part of the inner circumferential flow i1 generates an outer peripheral circulation e1 that "flows while pressing the guide plates 4 (4A to 4H) in the circumferential direction". Then, the outer peripheral circulation e1 applies a pressing force to the guide plates 4 (4A to 4H) in the circumferential direction.

That is, the turbine 1 is rotated by the frictional force and the inertial force on the rotating shaft 2 by the inner peripheral current i1 and the pressing force on the guide plates 4 (4A to 4H) by the outer peripheral circulation e1. Then, when the turbine 1 rotates in the rotation direction R, the fluid F newly supplied to the turbine 1 is supplied to the guide plate 4H (that is, on the paper surface of FIG. 2, the guide plate 4H instead of the guide plate 4A It will be located on the lower side.) As a result, the fluid F generates a guide flow g1 while flowing along the guide plate 4H. Further, as the turbine 1 rotates, the fluid F is supplied in the order of the guide plates 4G to 4B, and further supplied to the guide plate 4A again.

Here, assuming that the flow path in which the inner peripheral flow i1 is generated is the inner peripheral flow path c1 and the flow path in which the outer peripheral circulation e1 is generated is the outer peripheral flow path c2, both the inner peripheral flow path c1 and the outer peripheral flow path c2 are formed in an annular shape. Further, the outer peripheral flow path c2 is formed outside the inner peripheral flow path c1 in the radial direction. Then, in the inner peripheral flow path c1, the inner peripheral flow i1 is generated in the entire circumferential direction. On the other hand, in the outer peripheral flow path c2, the outer peripheral circulation e1 is generated between the guide plates 4 (4A to 4H) in the circumferential direction.

As described above, according to the first embodiment of the turbine according to the present invention, since the cross section S of the rotating shaft 2 (the cross section orthogonal to the axial direction of the rotating shaft 2) is circular, the fluid F is the outer periphery of the cross section S. It flows along C in the circumferential direction of the rotation axis 2. As a result, the inner peripheral flow i1, which is the flow of the fluid F along the outer peripheral C in the circumferential direction of the rotating shaft 2, is generated. Further, when a centrifugal force acts on the inner circumferential flow i1, a part of the inner circumferential flow i1 travels outward in the radial direction of the rotation shaft 2. Further, the inner peripheral flow i1 that has proceeded in this way generates an outer peripheral circulation e1 that "flows while pressing the guide plates 4 (4A to 4H) in the circumferential direction of the rotating shaft 2." Then, the inner peripheral flow i1 rotates the turbine 1 by applying a frictional force and an inertial force to the rotating shaft 2 in the circumferential direction of the rotating shaft 2. On the other hand, the outer peripheral circulation e1 rotates the turbine 1 by applying a pressing force to the guide plates 4 (4A to 4H) in the circumferential direction of the rotation shaft 2. That is, according to the first embodiment, even when "the flow of the fluid F used for the rotation of the turbine 1 is low" and "the direction of this flow changes with the passage of time". It can rotate efficiently by both the inner circulation flow i1 and the outer circumference circulation e1.

Further, in the first embodiment, the guide plates 4 (4A to 4H) are provided so as to be inclined in the circumferential direction with respect to the radial direction. As a result, the fluid F supplied to the turbine 1 flows along the guide plates 4 (4A to 4H) from the radial outer side to the inner side of the rotating shaft 2 to obtain a velocity component in the circumferential direction of the rotating shaft 2. Given. Therefore, the inner peripheral flow i1 can be efficiently generated from the fluid F supplied to the turbine 1.

In the first embodiment, the rotating shaft 2 is formed in a columnar shape, but if the cross section S orthogonal to the axial direction of the rotating shaft 2 is circular, the shape of the rotating shaft 2 is other than the cylindrical shape (for example,). , Conical, etc.). Further, in the first embodiment, two rotating plates 3 (3A, 3B) are installed, but only one of them or three or more may be installed. Further, in the first embodiment, eight guide plates 4 (4A to 4H) are used, but the number of guide plates 4 to be installed is not particularly limited. Further, in the first embodiment, the rotating plate 3 (3A, 3B) and the guide plate 4 (4A to 4H) each use a flat plate member, but a member other than the flat plate member such as a corrugated member is used. You can also do it. Further, in the first embodiment, the guide plate 4 (4A to 4H) extends in the radial direction, but may extend in the radial direction.

Next, a second embodiment of the turbine according to the present invention will be described. In the following, among the configurations of the second embodiment, the configurations common to the first embodiment are designated by the same reference numerals as those of the first embodiment, and the description thereof will be omitted.

FIG. 3 is a partially cutaway perspective view showing a second embodiment of the turbine according to the present invention. FIG. 4 is a schematic cross-sectional view of the turbine shown in FIG. As shown in FIGS. 3 and 4, the turbine 11 includes a guide plate 14 (14A to 14H) instead of the guide plate 4 (4A to 4H) included in the turbine 1 shown in FIG. As shown in FIGS. 3 and 4, the guide plates 14 (14A to 14H) have a fluid inflow guide portion 14a formed so as to extend in a "direction inclined in the circumferential direction with respect to the radial direction" and a fluid inflow guide. It has an inner circumferential flow maintenance portion 14b extending from the radial inner end portion of the portion 14a, and an outer peripheral circulation maintenance portion 14c extending from the radial outer end portion of the fluid inflow guide portion 14a. Then, the inner peripheral flow maintenance portion 14b extends on both sides in a direction orthogonal to the radial direction passing through the radial central portion of the rotating shaft 2 and the radial inner end portion of the fluid inflow guide portion 14a. There is. The outer peripheral circulation maintaining portion 14c extends on both sides in a direction orthogonal to the radial direction passing through the radial central portion of the rotating shaft 2 and the radial outer end portion of the fluid inflow guide portion 14a.

Further, the fluid inflow guide portion 14a in each guide plate 14 (14A to 14H) corresponds to the guide plate 4 (4A to 4H) shown in FIGS. 1 and 2, respectively. In addition, in FIGS. 3 and 4, reference numerals 14a to 14c are attached only to the guide plate 14A, and the description of reference numerals 14a to 14c is omitted for the guide plates 14B to 14H. In FIG. 4, R indicates the rotation direction of the turbine 11.

As described above, according to the second embodiment, the rapid dispersion of the inner circulation flow i1 (dispersion of the rotating shaft 2 to the outside in the radial direction) is suppressed by the inner circulation flow maintenance unit 14b, and the inner circulation flow i1 is suppressed. The flow rate of the fluid F flowing as can be increased. Therefore, the turbine 11 can be rotated more efficiently by the inner circumferential flow i1. The "rapid dispersion of the inner peripheral flow i1" is the dispersion caused by the action of centrifugal force on the inner peripheral flow i1.

Further, according to the second embodiment, the rapid dispersion of the outer peripheral circulation e1 (dispersion of the rotating shaft 2 to the outside in the radial direction) is suppressed by the outer peripheral circulation maintaining portion 14c, and the fluid F flowing as the outer peripheral circulation e1 is suppressed. The flow rate can be increased. Therefore, the turbine 11 can be rotated more efficiently by the outer peripheral circulation e1 in the circumferential direction of the rotation shaft 2. The "rapid dispersion of the outer peripheral circulation e1" is the dispersion caused by the action of centrifugal force on the outer peripheral circulation e1.

In the second embodiment, both the inner circulation maintenance unit 14b and the outer circumference circulation maintenance unit 14c are provided, but only one of these may be provided. Further, in the second embodiment, the inner peripheral flow maintenance section 14b and the outer peripheral circulation maintenance section 14c extend from the fluid inflow guide section 14a in both directions, but may extend in only one direction.

However, as in the second embodiment, by providing both the inner peripheral circulation maintaining portion 14b and the outer peripheral circulation maintaining portion 14c, the "radial outward dispersion" of the outer peripheral circulation e1 is suppressed by the outer peripheral circulation maintaining portion 14c. In addition, the "inward dispersion in the radial direction" of the outer peripheral circulation e1 can be suppressed by the inner peripheral circulation maintenance unit 14b. Therefore, the pressing force can be efficiently applied to the "fluid inflow guide portion 14a of the guide plate 14 (14A to 14H)" by the outer peripheral circulation e1. The "dispersion inward in the radial direction" of the outer peripheral circulation e1 is caused by the flow of the fluid F (guide flow g1) supplied from the outside in the radial direction of the rotating shaft 2 to the inside. Further, the "radial outward dispersion" of the outer peripheral circulation e1 is caused by the action of centrifugal force on the outer peripheral circulation e1.

Further, as in the second embodiment, the inner circumferential flow maintenance portion 14b and the outer peripheral circulation maintenance portion 14c extend from the fluid inflow guide portion 14a in both directions, so that both maintenance portions are provided regardless of the rotation direction of the turbine 11. 14b and 14c can be made to function. Therefore, when the fluid supply direction to the turbine 11 changes with the passage of time (in the paper of FIG. 4, the fluid F is supplied alternately in the “bottom to top direction” and the “top to bottom direction”. Even if it is done), both maintenance units 14b and 14c can function. Therefore, the turbine 11 can be a "rotating body that can be suitably used in a tidal power generation device (a device in which fluid is supplied from different directions with the passage of time)".

Next, a third embodiment of the turbine according to the present invention will be described. In the following, among the configurations of the third embodiment, the configurations common to the second embodiment are designated by the same reference numerals as those of the second embodiment, and the description thereof will be omitted. As shown in FIG. 5, the turbine 21 includes guide plates 24 (24A to 24H) instead of the guide plates 14 (14A to 14H) shown in FIGS. 3 and 4. These guide plates 24 (24A to 24H) include a fluid inflow guide portion 24a instead of the fluid inflow guide portion 14a shown in FIGS. 3 and 4. The fluid inflow guide portion 24a is formed so as to extend in the radial direction.

Here, as shown in FIG. 5, the fluid F is supplied in the "direction inclined in the circumferential direction with respect to the radial direction". Further, in such a supply method, for example, "a plurality of fixed guide plates (not shown) extending in the inclined direction are arranged along the circumferential direction on the radial outer side of the turbine 21, and these fixed guide plates are used. A method of "supplying the fluid F from the outer side in the radial direction to the inner side in the radial direction" can be mentioned. Further, in FIG. 5, R indicates the rotation direction of the turbine 21.

As described above, according to the third embodiment, since the fluid inflow guide portion 24a extends in the radial direction (rather than inclining in the circumferential direction with respect to the radial direction), the fluid F “to the turbine 21”. Regardless of the "supply direction of", the direction in which the guide flow g1 is generated can be made constant (unified in the radial direction). As a result, even if the "direction in which the fluid F is supplied to the turbine 21" changes with the passage of time, the state of the water flow (fluid flow velocity and flow direction) inside the turbine 21 can be made substantially constant. The rotation speed of the turbine 21 can be made substantially constant. Therefore, the turbine 21 can be effectively used in a power generation device (tidal power generation device) in which the flow direction of the fluid changes with the passage of time.

Next, a fourth embodiment of the turbine according to the present invention will be described. FIG. 6 is a schematic cross-sectional view showing a fourth embodiment of the turbine according to the present invention. As shown in FIG. 6, the turbine 31 has a plurality of guide plates 34 (34A to 34H), 35 (35A to 35H), instead of the plurality of guide plates 4 (4A to 4H) included in the turbine 1 shown in FIG. 36 (36A to 36H) is provided. Specifically, the turbine 31 includes a plurality of first guide plates 34 (34A to 34H), a plurality of second guide plates 35 (35A to 35H), and a plurality of third guide plates 36 (36A to 36H). It has.

Here, the first guide plates 34 (34A to 34H) are fixed to the rotating plates 3A and 3B (only the rotating plate 3B is shown in FIG. 6) along the circumferential direction on the outer peripheral side of the rotating shaft 2. Further, the plurality of second guide plates 35 (35A to 35H) are rotating plates 3A and 3B along the circumferential direction on the outer side in the radial direction as compared with the plurality of first guide plates 34 (34A to 34H) (FIG. 6). Is fixed to (only 3B is shown). Further, the plurality of third guide plates 36 (36A to 36H) are rotating plates 3A and 3B along the circumferential direction on the radial outer side as compared with the plurality of second guide plates 35 (35A to 35H) (FIG. 6). Is fixed to (only 3B is shown).

Further, in the radial direction, the distance between the inner end portion of each of the plurality of second guide plates 35 (35A to 35H) and the rotation shaft 2 is the same as the outer end portion of each of the plurality of first guide plates 34 (34A to 34H). It is long compared to the distance from the rotating shaft 2. Further, in the radial direction, the distance between the inner end portion of each of the plurality of third guide plates 36 (36A to 36H) and the rotation shaft 2 is the same as the outer end portion of each of the plurality of second guide plates 35 (35A to 35H). It is long compared to the distance from the rotating shaft 2.

The plurality of guide plates 34 (34A to 34H), 35 (35A to 35H), and 36 (36A to 36H) are positioned as one or both of the inner guide plate and the outer guide plate. The outer guide plate is a guide plate arranged outside the inner guide plate in the radial direction. Then, in the radial direction, the distance between the inner end of the outer guide plate and the rotating shaft 2 is longer than the distance between the outer end of the inner guide plate and the rotating shaft 2. In the turbine 31, the first guide plate 34 (34A to 34H) corresponds to the inner guide plate, and the third guide plate 36 (36A to 36H) corresponds to the outer guide plate. Further, the second guide plate 35 (35A to 35H) corresponds to the outer guide plate in comparison with the first guide plate 34 (34A to 34H), and the inner side in comparison with the third guide plate 36 (36A to 36H). Corresponds to the information board.

Further, the plurality of second guide plates 35 (35A to 35H) are arranged so as to be significantly inclined in the circumferential direction with respect to the radial direction as compared with the plurality of first guide plates 34 (34A to 34H). .. Further, the plurality of third guide plates 36 (36A to 36H) are inclined in the same direction as the plurality of second guide plates 35 (35A to 35H), and are formed on the plurality of second guide plates 35 (35A to 35H). In comparison, they are arranged so as to be greatly inclined with respect to the radial direction. In this way, the outer guide plate is arranged so as to be greatly inclined in the circumferential direction with respect to the radial direction as compared with the inner guide plate.

The operation of the turbine 31 shown in FIG. 6 is as follows. First, the fluid F is supplied between the rotating plates 3A (not shown in FIG. 6) and 3B in an arbitrary linear direction in the plane direction (“the direction from the bottom to the top” in the paper surface of FIG. 6). This fluid F flows from the radial outer side to the inner side of the rotating shaft 2 along the third guide plate 36A. As a result, the third guide flow g3 is generated along the third guide plate 36A. Further, a part of the third guide flow g3 passes through the third inner circumferential flow i3 in the circumferential direction passing between the second guide plate 35 (35A to 35H) and the third guide plate 36 (36A to 36H). generate. Further, another part of the third guide flow g3 travels inward in the radial direction to generate the second guide flow g2 along the second guide plate 35A.

Further, a part of the second guide flow g2 passes the second inner circumferential flow i2 in the circumferential direction passing between the first guide plate 34 (34A to 34H) and the second guide plate 35 (35A to 35H). generate. Further, another part of the second guide flow g2 travels inward in the radial direction to the first guide flow g1 (“guide flow g1” shown in FIG. 2) along the first guide plates 34 (34A to 34H). Equivalent) is generated. Further, a part of the first guide flow g1 generates a first inner circumferential flow i1 (corresponding to the “inner circular flow i1” shown in FIG. 2) along the outer peripheral C in the circumferential direction.

Further, by the centrifugal force acting on each of the first inner peripheral flow i1 to the third inner peripheral flow i3, the first inner peripheral flow i1 to the third inner peripheral flow i3 each proceed outward in the radial direction. As a result, the first outer peripheral circulation e1 is generated from a part of the first inner circumference flow i1, the second outer circumference circulation e2 is generated from a part of the second inner circumference flow i2, and a part of the third inner circumference flow i3. The third outer peripheral circulation e3 is generated from. Then, the first outer peripheral circulation e1 to the third outer peripheral circulation e3 press the first guide plates 34 (34A to 34H) to the third guide plates 36 (36A to 36H) in the circumferential direction, respectively. In FIG. 6, the first outer peripheral circulation e1 to the third outer peripheral circulation e3 are shown only in a part of the place where the first outer peripheral circulation e1 to the third outer peripheral circulation e3 occur.

Here, the flow path in which the first inner peripheral flow i1 is generated is the first inner peripheral flow path c1 (corresponding to the “inner peripheral flow path c1” shown in FIG. 2), and the flow path in which the first outer peripheral circulation e1 is generated is the first outer peripheral flow path. c2 (corresponding to "outer peripheral flow path c2" shown in FIG. 2), the flow path in which the second inner peripheral flow i2 is generated is the second inner peripheral flow path c3, and the flow path in which the second outer peripheral circulation e2 is generated is the second outer peripheral flow path. The flow path in which c4 and the third inner peripheral flow i3 are generated is referred to as the third inner peripheral flow path c5, and the flow path in which the third outer peripheral circulation e3 is generated is referred to as the third outer peripheral flow path c6. In this case, these flow paths c1 to c6 are formed in an annular shape. Then, the separation distance (distance in the radial direction) from the rotating shaft 2 increases in the order of the flow paths c1, c2, c3, c4, c5, and c6.

As described above, according to the fourth embodiment of the turbine according to the present invention, in the circumferential direction of the rotating shaft 2, the first guide plate is separated from the first inner peripheral flow i1 along the outer peripheral C of the rotating shaft 2. The second inner circumferential flow i2 passing between the 34 (34A to 34H) and the second guide plate 35 (35A to 35H), and the second guide plate 35 (35A to 35H) and the third guide plate 36 (36A). It is possible to further generate a third inner circumferential flow i3 that passes between ~ 36H). Therefore, a plurality of inner circumferential flows i1 to i3 can be generated at "different positions in the radial direction of the rotating shaft 2", and the turbine 31 can be rotated more efficiently by utilizing these plurality of inner circumferential flows i1 to i3. Can be made to.

In the fourth embodiment, the first guide plate 34 (34A to 34H), the second guide plate 35 (35A to 35H), and the third guide plate 36 (36A to 36H) were installed. However, it is also possible to install only the first guide plate 34 (34A to 34H) and the second guide plate 35 (35A to 35H) without installing the third guide plate 36 (36A to 36H), or the third A guide plate can be further installed on the radial outer side of the guide plate 36 (36A to 36H).

Next, an embodiment of the tidal power generation device according to the present invention will be described. FIG. 7 is a perspective view showing an embodiment of the tidal power generation device according to the present invention. The tidal power generation device 101 shown in FIG. 7 is a power generation device that uses the tidal current generated by the tide to generate electricity. As shown in FIG. 7, in the tidal power generation device 101, the turbine 1 (1A, 1B), the housing 110 in which the turbine 1 (1A, 1B) is installed inside, and the turbine 1 (1A, 1B) rotate. A generator (not shown) that generates electricity from the housing 110, a main inflow portion I1 and a side inflow portion I2 that are spaces for water W1 to flow in from the outside to the inside of the housing 110, and water W2 from the inside to the outside of the housing 110. It includes a main outflow section D1 and a side outflow section D2, which are outflow spaces.

The housing 110 has a top plate 120 and a bottom plate 130. Further, the top plate 120 and the bottom plate 130 are arranged so as to be parallel to each other. Further, the top plate 120 and the bottom plate 130 are arranged in a plane direction orthogonal to the axial direction of the turbine 1 (1A, 1B). The top plate 120 is attached to the turbine 1 (1A, 1B) at one end in the axial direction of the turbine 1 (1A, 1B). Further, the bottom plate 130 is attached to the turbine 1 (1A, 1B) at the other end in the axial direction of the turbine 1 (1A, 1B).

FIG. 8 is a schematic cross-sectional view showing the tidal power generation device shown in FIG. 7. As shown in FIG. 8, in the main inflow portion I1, water W1 flows in the linear direction in which the first straight line d1 (virtual line) extends, and the main stream M1 is generated. Further, in the main outflow portion D1, water W2 flows out in the linear direction to generate the main stream M2. The first straight line d1 is a straight line that passes through the center of the tidal power generation device 101 in the X direction and extends in the Y direction on a plane (XY plane shown in FIG. 8) orthogonal to the axial direction of the turbine 1 (1A, 1B). Is. Further, in the side inflow portion I2, water W1 flows in in the "direction inclined with respect to the first straight line d1 in the XY plane" to generate a side flow B1. Further, in the side outflow portion D2, the water W2 flows out in the “direction inclined with respect to the first straight line d1 in the XY plane” to generate a side flow B2.

Further, as shown in FIG. 8, the main inflow portion I1 is a region between a set of main inflow plates 111 (111A, 111B) formed symmetrically with respect to the first straight line d1 in the XY plane. Further, the main outflow portion D1 is a region between a set of main outflow plates 112 (112A, 112B) formed symmetrically with respect to the first straight line d1 in the XY plane. Further, a set of main inflow plates 111 (111A, 111B) and a set of main outflow plates 112 (112A, 112B) are formed symmetrically with respect to the second straight line d2 on the XY plane. Further, the side inflow plate 113A (113B) and the side outflow plate 114A (114B) are formed symmetrically with respect to the second straight line d2 in the XY plane. The second straight line d2 is a straight line that passes through the center of the tidal power generation device 101 in the Y direction in the XY plane and is orthogonal to the first straight line d1.

Further, as shown in FIG. 8, the side inflow portion I2 has a position between one 111A of a set of main inflow plates 111 (111A, 111B) and the side inflow plate 113A, and a set of main inflow plates 111 (11A, 111B). 111A, 111B) are formed at positions between the other 111B and the side inflow plate 113B, respectively. Further, the side outflow portion D2 is located at a position between one 112A of the set of main outflow plates 112 (112A, 112B) and the side outflow plate 114A, and the other 112B of the set of main outflow plates 112 (112A, 112B). It is formed at a position between the side outflow plate 114B and the side outflow plate 114B, respectively.

Further, as shown in FIG. 8, the distance (distance in the X direction) between the set of main outflow plates 112 (112A, 112B) gradually increases from the upstream side to the downstream side of the main stream M2. Therefore, the mainstream M2 is discharged so as to diffuse from the inside of the housing 110 to the outside. That is, the main outflow portion D1 functions as a diffuser. Further, the distance between the main outflow plate 112A and the side outflow plate 114A (“a direction in which an angle of 45 ° with respect to the X direction is formed in the XY plane and an angle of 45 ° with respect to the Y direction is formed). The distance) in "" gradually increases from the upstream side to the downstream side of the side flow B2. Therefore, the side flow B2 is discharged so as to diffuse from the inside of the housing 110 to the outside. That is, the side outflow portion D2 (the region between the main outflow plate 112A and the side outflow plate 114A) functions as a diffuser. Further, the side outflow portion D2 between the main outflow plate 112B and the side outflow plate 114B also functions as a diffuser. As a result, the main outflow section D1 and the side outflow section D2 have a high effect of sucking water from the turbine installation section E, and efficiently suck out the water flowing in the turbine installation section E and discharge it to the outside of the tidal power generation device 101.

Further, as shown in FIG. 8, the tidal power generation device 101 has a flat plate shape with a backflow prevention plate 115 (115A, 115B) formed in an arc shape along the outer circumference of the turbine 1 (1A, 1B) in the XY plane. The outer plate 116 (116A, 116B) formed is provided. In the backflow prevention plate 115A (115B), one end thereof is connected to the tip of the side inflow plate 113A (113B), and the other end is connected to the tip of the side outflow plate 114A (114B). Further, in the outer plate 116A (116B), one end thereof is connected to the tip of the side inflow plate 113A (113B), and the other end is connected to the tip of the side outflow plate 114A (114B). Further, a flow path through which water flows along the rotation direction R1 (or rotation direction R2) of the turbine 1A is formed between the backflow prevention plate 115A and the turbine 1A.

Further, the space between the main inflow portion I1 and the main outflow portion D1 is defined as a turbine installation portion E in which a plurality of turbines 1A and 1B are installed. In the turbine installation portion E, the turbines 1A and 1B are installed so as to be separated from each other in the direction in which the second straight line d2 extends.

Further, as shown in FIG. 8, the tidal power generation device 101 includes a set of flow adjusting columns 117 and 118. The flow adjusting column 117 is arranged in the main inflow portion I1. Further, the flow adjusting column 118 is arranged in the main outflow portion D1. Further, in the flow adjusting column 117, the distance in the direction orthogonal to the first straight line d1 in the XY plane gradually decreases from the center in the direction in which the first straight line d1 extends (the center in the flow adjusting column 117) toward both sides of the center. The same applies to the flow adjusting column 118.

Further, as shown in FIG. 8, the tidal power generation device 101 is formed with ballast tank portions T1 to T4 that function as ballast tanks of the tidal power generation device 101. The ballast tank portion T1 is formed by enclosing air in a space surrounded by a side inflow plate 113A, a side outflow plate 114A, a backflow prevention plate 115A, and an outer plate 116A. Further, the ballast tank portion T2 is formed by enclosing air in a space surrounded by a side inflow plate 113B, a side outflow plate 114B, a backflow prevention plate 115B, and an outer plate 116B. Further, the ballast tank portion T3 is formed by enclosing air in the internal space of the flow adjusting column 117. Further, the ballast tank portion T4 is formed by enclosing air in the internal space of the flow adjusting column 118.

Next, the operation of the tidal power generation device 101 shown in FIGS. 7 and 8 will be described. First, the tidal power generator 101 shown in FIGS. 7 and 8 is installed in the sea. Next, a tidal current is generated by the sea level rising due to the tide, and the water W1 is supplied to the tidal power generation device 101 by this tidal current. As shown in FIG. 7, the water W1 supplied to the tidal power generator 101 flows into the housing 110 (see also FIG. 8) from the main inflow portion I1 to generate the main stream M1, and the side inflow portion I2 to the housing 110. The side flow B1 is generated by flowing into the inside.

Here, the main stream M1 is generated in the main inflow portion I1 so as to be divided on both sides in the direction in which the second straight line d2 extends. Then, the main stream M1 merges with the side stream B1 inside the housing 110. Due to this merging, water is dispersed inside the housing 110 and supplied to the turbine 1 (1A, 1B). As a result, the turbine 1 (1A, 1B) rotates in the rotation direction R1, and the generator (not shown) attached to the turbine 1 (1A, 1B) generates electricity.

Further, as shown in FIG. 8, in the water obtained by rotating the turbine 1 (1A, 1B), a part of the water flows out from the main outflow portion D1 to the outside of the housing 110 to generate the main stream M2, and another one thereof. A portion flows out from the side outflow portion D2 to the outside of the housing 110 to generate a side flow B2, and the remaining portion rotates the turbine 1 (1A, 1B) and runs along the backflow prevention plate 115 (115A, 115B) in the housing 110. Circulates inside the housing. The flow of water that circulates in this way accelerates the side flow B1 generated in the side inflow portion I2 in the circumferential direction of the turbine 1 (1A, 1B).

Further, outside the tidal power generation device 101, a part of the water W1 flows along the outer plates 116 (116A, 116B). Since this flow (external flow) is a flow that travels straight without rotating the turbine 1 (1A, 1B), it is faster than the main flow M2 and the side flow B2. Then, the side flow B2 travels straight in the direction inclined to the first straight line d1 in the XY plane (see FIG. 8), so that it merges with the external flow outside the housing 110 and is accelerated. Therefore, in the side outflow portion D2, water is discharged from the tidal power generation device 101 at a higher speed than in the main outflow portion D1.

Further, as the sea level descends due to the tide, water W2 flows into the housing 110 from the main outflow portion D1 and the side outflow portion D2 in the tidal power generation device 101 as shown by the dotted line arrow in FIG. 8, and the water W1 Outflows from the main inflow portion I1 and the side inflow portion I2 to the outside of the housing 110. In this case, the turbine 1 (1A, 1B) rotates in the rotation direction R2, which is the direction opposite to the rotation direction R1.

As described above, according to one embodiment of the tidal power generation device according to the present invention, by providing the side inflow portion I2, the water W1 enters the housing 110 from a direction different from the inflow direction of the water W1 in the main inflow portion I1. It will flow in. As a result, tidal currents having different flow directions (the flow of water W1 flowing in from the main inflow portion I1 and the flow of water W1 flowing in from the side inflow portion I2) merge inside the housing 110, and due to this merging, inside the housing 110. Water W1 is dispersed in various directions to transmit force to turbines 1 (1A, 1B). Therefore, it is possible to widen the range of locations where the force due to the tidal current is transmitted in the turbine 1 (1A, 1B) by a simple method of forming the side inflow portion I1. Therefore, it is possible to obtain a power generation device that can be manufactured at low cost and can efficiently rotate the turbine 1 (1A, 1B) to generate power.

On top of that, by providing the side outflow portion I2, the side outflow portion D2 can function as the side inflow portion I2 even when the flow direction of the water W1 changes inside the housing 110 due to the tide. As a result, the tidal power generation device 101 can be produced at low cost and can efficiently rotate the turbines 1 (1A and 1B) to generate electricity. When the flow direction of the water W1 changes inside the housing 110 due to the tide, the main outflow portion D1 can function as the main inflow portion I1.

Further, according to the tidal power generation device 101 according to the present embodiment, the main inflow portion I1 is installed so as to efficiently generate the inner peripheral flow i1, and the side inflow portion I2 is provided so as to efficiently generate the outer peripheral circulation e1. Can be installed. That is, the optimum fluid supply direction to the turbine 1 (1A, 1B) is aimed at efficiently generating the inner circumferential flow i1 in the turbine 1 (1A, 1B), or in the turbine 1 (1A, 1B). It depends on whether the purpose is to efficiently generate the outer peripheral circulation e1. Therefore, conventionally, it has been difficult to supply the fluid F to the turbine 1 (1A, 1B) so as to achieve these two purposes at the same time. However, the tidal power generation device 101 according to the present embodiment can achieve the above two purposes at the same time by installing the main inflow portion I1 and the side inflow portion I2 in which the inflow directions of the water W1 are different, and the turbine 1 (1A, 1B). ) Can be fully exerted. Therefore, according to the tidal power generation device 101 according to the present embodiment, the turbine 1 (1A, 1B) can be efficiently rotated by both the inner peripheral flow i1 and the outer peripheral circulation e1, and power generation can be performed efficiently. it can.

In the tidal power generation device 101 according to the present embodiment, as described above, the water W1 flows in from the main inflow portion I1 and the side inflow portion I2 due to the tidal current generated by the tidal current, and the water W2 is caused by this tidal current. Power is generated in both the case of inflow from the main outflow portion D1 and the case of inflow from the side outflow portion D2. However, the tidal power generation device 101 according to the present embodiment can generate electricity even when seawater flows only from the main inflow portion I1 and the side inflow portion I2 due to the ocean current. Further, the tidal power generation device 101 can be installed in a water area (river or lake) other than the sea.

Further, in the tidal power generation device 101 according to the present embodiment, as shown in FIGS. 7 and 8, side inflow portions I2 are formed on both sides in the X direction, but may be formed in only one of them. Similarly, the side outflow portion D2 may be formed only on one side in the X direction. Further, although the turbine 1 shown in FIG. 1 is installed as the turbine, the turbine 11 shown in FIG. 3, the turbine 21 shown in FIG. 5, and the turbine 31 shown in FIG. 6 may be installed.

In particular, in the tidal power generation device 101 according to the present embodiment, by providing the "turbine 21 shown in FIG. 5" instead of the turbine 1 (1A, 1B), water W1 flows in from the main inflow portion I1 and the side inflow portion I2. In the case where the water W2 flows in from the main outflow portion D1 and the side outflow portion D2, the state of the water flow (water flow direction, etc.) at each location inside the housing 110 can be made the same. Further, the turbine 21 shown in FIG. 5 has a drawback that it does not operate unless water is supplied in the "direction inclined in the circumferential direction with respect to the radial direction of the turbine 21". However, in the tidal power generation device 101 according to the present embodiment, water W1 flows in from the side inflow portion I2 in the "direction inclined in the circumferential direction with respect to the radial direction of the turbine 21". Therefore, the tidal power generation device 101 according to the present embodiment can rotate the turbine 21 after utilizing the advantages of the turbine 21 and eliminating the disadvantages by providing the "turbine 21 shown in FIG. 5". ..

1 Turbine 2 Rotating shaft 3 (3A, 3B) Rotating plate 4 (4A-4H) Guide plate
11 Turbine 14 (14A-14H) Guide plate 14a Fluid inflow guide 14b Inner circulation maintenance 14c Outer circumference maintenance 21 Turbine 24a Fluid inflow guidance 31 Turbine
34 (34A to 34H) First guide plate 35 (35A to 35H) Second guide plate 36 (36A to 36H) Third guide plate 101 Tidal power generator 110 Housing 111 (111A, 111B) Main inflow plate (main outflow plate)
112 (112A, 112B) Main outflow plate (main inflow plate)
113 (113A, 113B) Side inflow plate 114 (114A, 114B) Side outflow plate 115 (115A, 115B) Backflow prevention plate 116 (116A, 116B) Outer plate 117 Flow adjustment pillar 118 Flow adjustment pillar 120 Top plate 130 Bottom plate B1, B2 side flow C outer circumference c1 inner circumference flow path (first inner circumference flow path)
c2 Outer perimeter flow path (first outer perimeter flow path)
c3 Second inner peripheral flow path c4 Second outer peripheral flow path c5 Third inner peripheral flow path c6 Third outer peripheral flow path D1 Main outflow part (main inflow part)
D2 side outflow part (side inflow part)
d1 First straight line d2 Second straight line E Turbine installation part e1 Outer circumference circulation (first outer circumference circulation)
e2 Second outer peripheral circulation e3 Third outer peripheral circulation F Fluid g1 Guided flow (first guided flow)
g2 Second guide flow g3 Third guide flow I1 Main inflow part (main outflow part)
I2 side inflow part (side outflow part)
i1 Inner circulation (first inner circulation)
i2 Second inner circulation i3 Third inner circulation M1, M2 Main stream S Cross section T1 to T4 Ballast tank W1, W2 Water

Claims (7)

A turbine that rotates with the flow of fluid
The axis of rotation and
A rotating plate that rotates integrally with the rotating shaft,
On the outer peripheral side of the rotating shaft, a plurality of guide plates fixed to the rotating plate along the circumferential direction of the rotating shaft are provided.
Each of the plurality of guide plates is arranged so as to be separated from the rotating shaft in the radial direction of the rotating shaft.
In the rotation axis, the cross section orthogonal to the axial direction of the rotation axis is circular.
A turbine characterized in that the fluid flows along the outer circumference while contacting the outer circumference of the cross section. The turbine according to claim 1, wherein the guide plate is provided so as to be inclined in the circumferential direction with respect to the radial direction. The guide plate
A fluid inflow guide extending in the radial direction or in a direction inclined in the circumferential direction with respect to the radial direction.
It has an inner circumferential flow maintenance portion extending from the radial inner end portion of the fluid inflow guide portion.
The inner circumferential flow maintaining portion is provided in the radial direction passing through the radial center portion of the rotating shaft and the radial inner end portion of the fluid inflow guide portion on a plane orthogonal to the axial direction of the rotating shaft. The turbine according to claim 1 or 2, wherein the turbine extends in a direction orthogonal to the turbine. The guide plate
A fluid inflow guide extending in the radial direction or in a direction inclined in the circumferential direction with respect to the radial direction.
It has an outer peripheral circulation maintaining portion extending from the radial outer end portion of the fluid inflow guide portion.
The outer peripheral circulation maintaining portion is provided in a plane orthogonal to the axial direction of the rotating shaft with respect to the radial direction passing through the radial center portion of the rotating shaft and the radial outer end portion of the fluid inflow guide portion. The turbine according to claim 1 or 2, wherein the turbine extends in an orthogonal direction. The guide plate
A fluid inflow guide extending in the radial direction or in a direction inclined in the circumferential direction with respect to the radial direction.
An inner circumferential flow maintenance portion extending from the radial inner end portion of the fluid inflow guide portion, and a
It has an outer peripheral circulation maintaining portion extending from the radial outer end portion of the fluid inflow guide portion.
The inner circumferential flow maintaining portion is provided in the radial direction passing through the radial center portion of the rotating shaft and the radial inner end portion of the fluid inflow guide portion on a plane orthogonal to the axial direction of the rotating shaft. It extends in the direction orthogonal to it and
The outer peripheral circulation maintaining portion is provided in a plane orthogonal to the axial direction of the rotating shaft with respect to the radial direction passing through the radial center portion of the rotating shaft and the radial outer end portion of the fluid inflow guide portion. The turbine according to claim 1 or 2, wherein the turbine extends in an orthogonal direction. The plurality of guide plates
Inside guide plate and
An outer guide plate arranged outside the inner guide plate in the radial direction is included.
In the radial direction
Any of claims 1 to 5, wherein the distance between the inner end portion of the outer guide plate and the rotating shaft is longer than the distance between the outer end portion of the inner guide plate and the rotating shaft. The turbine according to item 1. A tidal power generator that uses the tidal current generated by the tide to generate electricity.
With the turbine
The housing in which the turbine is installed and
It is equipped with a generator that generates electricity by rotating the turbine.
The housing has a top plate, a bottom plate, a set of main inflow plates, a set of main outflow plates, side inflow plates, and side outflow plates.
Inside the housing, a main inflow portion, a main outflow portion, a side inflow portion, and a side outflow portion are formed.
The main inflow portion is a region in which water flows from the outside to the inside of the housing by the tidal current in a linear direction on a plane orthogonal to the axial direction of the turbine, and a first straight line extending in the linear direction on the plane. A region between the set of main inflow plates formed symmetrically with each other as a reference.
The main outflow portion is a region where water flows out from the inside of the housing to the outside in the straight line direction, and is between the set of main outflow plates formed symmetrically with respect to the first straight line on the surface. Is the area in
The set of main inflow plates and the set of main outflow plates are formed symmetrically with respect to the second straight line orthogonal to the first straight line on the surface.
The side inflow portion is a region where water flows from the outside to the inside of the housing by the tidal current in a direction inclined with respect to the linear direction on the surface, and is combined with one of the set of main inflow plates. It is a region between the side inflow plate and
The side outflow portion is a region where water flows out from the inside of the housing to the outside in a direction inclined with respect to the linear direction on the surface, and one of the set of main outflow plates and the side outflow portion. The area between the board and
The side inflow plate and the side outflow plate are formed symmetrically with respect to the second straight line on the surface.
The tidal power generation device according to any one of claims 1 to 6, wherein the turbine is the turbine according to any one of claims 1 to 6.

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