Water flow energy conversion unit

Abstract

To provide a water flow energy conversion unit that exhibits high energy conversion efficiency in water. [Solution] A water flow energy conversion unit X that converts the energy of a water flow into rotational motion comprises a water turbine body A installed in water and a flow straightening unit C that controls the water flow. The water turbine body A has an output shaft A1 extending substantially horizontally, a water receiving section A2 provided on the output shaft A1, and a support section A3 that pivotally supports the output shaft A1 so as to be rotatable around its central axis. The output shaft A1 is connected to a generator that is rotationally driven by its rotational movement. The water receiving section A2 has a water receiving body A21 that receives the water flow. The flow straightening unit C has a front flow straightening section C1 positioned in front of the water turbine body A when viewed from the axial direction. The upper surface of the front flow straightening section C1 is configured as an inclined surface that gradually slopes upward toward the top of the water turbine body A as it approaches the water turbine body A.

Description

Technical Field

[0001] The present invention relates to a water flow energy conversion unit that utilizes the rotational motion generated when a water receiving body of a waterwheel receives water flow.

Background Art

[0002] Waterwheels used for conventional hydropower generation are generally classified into impulse waterwheels and reaction waterwheels. An impulse waterwheel is a waterwheel that rotates by applying water flow from the tangential direction near the circumference of a rotating runner. A typical example is the Pelton waterwheel. On the other hand, a reaction waterwheel is a waterwheel that rotates by generating a force that changes the direction of the water flow when the water flow contacts the blades. Typical examples are Francis waterwheels and waterwheels using propellers. In addition, cross-flow waterwheels have the characteristics of both impulse waterwheels and reaction waterwheels.

[0003] Currently, the mainstream waterwheel for water flow power generation used in the ocean is a reaction waterwheel using a propeller. However, waterwheels using propellers require a speed reducer and a generator to be installed behind the propeller for each waterwheel. In addition, there is also a problem that the shape of the propeller is deformed by water pressure during long-term operation.

[0004] On the other hand, for impulse waterwheels, by arranging multiple in the lateral direction on one rotating shaft, the number of speed reducers and generators can also be limited to one for one rotating shaft.

[0005] Regarding the above-mentioned impulse waterwheel, for example, Patent Document 1 describes an invention related to the runner of an impulse waterwheel.

[0006] This runner of the impulse waterwheel includes a wheel disk and a number of bowl-shaped buckets arranged in the circumferential direction of the wheel disk. In addition, this runner is integrally joined by a divided body 1 and a divided body 2 that are divided by a plane parallel to the wheel disk and passing through the top of the bowl-shaped surface of the bucket.

[0007] This allows for easy machining of the bowl-shaped interior of the bucket from the side of the wheel disc using a tool, thereby reducing manufacturing costs. [Prior art documents] [Patent Documents]

[0008] [Patent Document 1] Japanese Patent Publication No. 2008-38633 [Overview of the project] [Problems that the invention aims to solve]

[0009] Incidentally, when an impulse turbine is installed in the atmosphere, the negative moment due to air pressure is almost negligible. However, when it is installed in water, water pressure is generated in the direction of rotation, making it impossible to ignore the negative moment. In other words, a high negative moment due to water pressure is generated simultaneously with a positive moment, which significantly hinders the rotational movement of the water turbine.

[0010] This invention has been made in view of the above-mentioned circumstances, and aims to provide a water flow energy conversion unit that exhibits high energy conversion efficiency by increasing the positive moment and suppressing the negative moment of an impulse turbine in water. [Means for solving the problem]

[0011] To solve the above problems, the present invention provides a water flow energy conversion unit that converts the energy of a water flow into rotational motion, It comprises a water turbine body installed in water and a flow straightening unit that controls the water flow, The turbine body comprises an output shaft extending substantially horizontally, a water receiving section provided on the output shaft, and a support section that pivotally supports the output shaft so as to be rotatable around its central axis. The output shaft is connected to a generator that is driven to rotate by its rotational movement. The water receiving section has a water receiving body that receives the water flow, The rectifier unit has a forward rectifier section positioned in front of the turbine body when viewed in the axial direction of the output shaft, The forward flow straightening section includes an inclined surface whose upper surface gradually slopes upward toward the turbine body as it approaches the turbine body.

[0012] According to the present invention, the water flow passing through the rectifying unit applies water pressure to the water receiving body, which is guided upward, and the water receiving body then rotates while receiving water pressure from the water flow above. Subsequently, the water flow descends due to gravity, and the water receiving body is guided downward. In this way, while the water receiving body is generally located above the center of the output shaft, the water pressure of the flowing water received by the receiving body is transmitted to the output shaft, resulting in a positive rotational moment being generated on the output shaft.

[0013] In a preferred embodiment of the present invention, the water receiving section is configured such that the water receiving body is not directly connected to the output shaft, but is connected via a connecting section.

[0014] This configuration allows the water receiver to move in a way that effectively captures the water flow, thereby increasing the positive rotational moment of the output shaft.

[0015] In a preferred embodiment of the present invention, the output shaft is provided with a reversing means for reversing the water receiving body with respect to the direction in which the connecting portion extends. The rectifier unit has a rear rectifier section located behind the turbine body when viewed from the axial direction of the output shaft, The rearward flow straightening section includes an inclined surface whose upper surface gradually slopes upward toward the turbine body as it approaches the turbine body.

[0016] This configuration ensures that even if the water flow reverses, a positive rotational moment is still generated in the output shaft, enabling efficient power generation.

[0017] In a preferred embodiment of the present invention, The connecting portion extends in a direction substantially perpendicular to the axial direction. The output shaft supports the water receiving portion so as to be slidable along the direction in which the connecting portion extends.

[0018] With such a configuration, due to the buoyancy force that guides the water receiving body upward, a sliding operation of the water receiving portion upward occurs. Along with this, the trajectory of the water receiving body above the output shaft becomes longer, and the water receiving body receives the water pressure of a large amount of water flow. Therefore, the positive rotational moment of the output shaft increases. Furthermore, due to inertia, the rotation of the output shaft continues. When the water receiving body is located below the output shaft, again due to the buoyancy force, a sliding operation of the water receiving portion upward occurs, and the water receiving body is brought closer to the output shaft. As a result, the trajectory of the water receiving body below the output shaft becomes shorter, and the negative moment applied to the rotation of the output shaft is reduced. Along with such an operation of the water receiving portion, the rotational speed of the output shaft accelerates.

[0019] In a preferred form of the present invention, a pair of the water receiving bodies are provided on the connecting portion. Each of the water receiving bodies is arranged at a substantially point-symmetrical diagonal position centered on the output shaft when viewed from the axial direction with respect to one of the connecting portions.

[0020] With such a configuration, the positive moment of the output shaft increases, leading to a more uniform rotation operation and enabling continuous rotation of the output shaft.

[0021] In a preferred form of the present invention, each of the water receiving bodies is configured in a container shape that opens in a direction substantially perpendicular to the direction in which the connecting portion provided with the water receiving body extends when viewed from the axial direction, so as to receive the water flow passing through the rectifying unit inside.

[0022] With such a configuration, the volume of the water flow received by the water receiving body increases, and it becomes possible to increase the positive rotational moment of the output shaft.

[0023] In a preferred embodiment of the present invention, each water receiving body is provided with a water receiving auxiliary plate that is erected along the direction of the opening from its opening end and that receives the water flow that has passed through the flow straightening unit on its surface. Each of the aforementioned water receiving auxiliary plates is positioned such that its base end surface partitions the opening of each of the aforementioned water receiving bodies along the axial direction.

[0024] This configuration increases the volume of water flow received by the water receiver, making it possible to further increase the positive rotational moment of the output shaft.

[0025] In a preferred embodiment of the present invention, each water receiving body has a streamlined shape on the side facing its open end.

[0026] This configuration reduces the negative moment experienced by the water receiving body, thereby suppressing resistance to the rotational movement of the output shaft.

[0027] In a preferred embodiment of the present invention, each of the water receiving bodies is provided with a flow straightening plate that divides its internal region along the axial direction.

[0028] This configuration suppresses turbulence in the water flow within the water receiver, leading to stable rotation of the output shaft.

[0029] In a preferred embodiment of the present invention, the water receiving sections are provided in multiple locations at intervals along the axial direction of the output shaft. Of the aforementioned connecting portions, at least two of the extending directions are arranged to be in different directions when viewed from the axial direction.

[0030] This configuration enables smooth and continuous rotation of the output shaft.

[0031] In a preferred embodiment of the present invention, the connecting portion is provided with a stopper portion that controls the sliding distance of the water receiving portion.

[0032] This configuration ensures a constant sliding distance for the water receiving section, regardless of the strength of the water flow, and maintains stable rotational operation of the output shaft.

[0033] In a preferred embodiment of the present invention, an auxiliary unit is provided to assist in the rotation of the output shaft, The auxiliary unit comprises a first magnetic part configured separately from the turbine body, a second magnetic part provided on the water receiving body and having the same polarity as the first magnetic part, and a magnetic part support that supports the first magnetic part. The first magnetic section is positioned adjacent to the rear of the turbine body and is supported by the magnetic section support so as to face the front rectifier section via the turbine body. The second magnetic section is configured to be able to face the first magnetic section by the rotation of the output shaft.

[0034] This configuration allows for the acceleration of the sliding motion of the water receiving part by utilizing the repulsive force of magnetism, thereby increasing the time during which the water receiving part generates a positive rotational moment.

[0035] In a preferred embodiment of the present invention, the connecting portion is composed of a first connecting portion and a second connecting portion, each extending substantially perpendicular to the axial direction. The first connecting portion and the second connecting portion are arranged adjacent to each other along the axial direction such that their respective extending directions are substantially perpendicular to each other. The water receiving bodies are provided in pairs at the first and second connecting sections, respectively. Each of the water receiving bodies is positioned at a diagonal position that is substantially point-symmetric with respect to the output axis when viewed from the axial direction, with respect to the first and second connecting portions, respectively. The output shaft supports the water receiving portion so that it can slide along the direction in which the first and second connecting portions extend.

[0036] With this configuration, the water receiving body passes through the same area viewed from the axial direction four times during one rotation of the output shaft. In other words, by having a first connecting section and a second connecting section, the total volume of the water flow that gives rise to the positive rotational moment received by one water receiving section increases, making it possible to accelerate the rotational speed of the output shaft.

[0037] In a preferred embodiment of the present invention, the connecting portion rotatably supports the water receiving body, The axial direction of the rotating shaft of the water receiving body is configured to be substantially parallel to the axial direction of the output shaft.

[0038] With this configuration, the water receiving body rotates when subjected to water pressure, allowing it to effectively capture the water flow on both sides, and as a result, efficient rotation of the output shaft becomes possible.

[0039] In a preferred embodiment of the present invention, the water receiving portion has a stopper member, The stopper member limits the rotation angle of the water receiving body to a predetermined range.

[0040] With this configuration, the force generated by the rotational movement of the water receiving body is transmitted to the stopper member, causing it to press against the stopper member, thus enabling more efficient rotational movement.

[0041] In a preferred embodiment of the present invention, the water receiving portion has a plurality of the connecting portions, Each of the aforementioned connecting parts is provided at intervals around the output shaft.

[0042] This configuration increases the positive rotational moment of the output shaft and also suppresses rotational irregularities of the output shaft.

[0043] In a preferred embodiment of the present invention, the flow straightening unit has an upper flow straightening section that covers the upper part of the water turbine body.

[0044] This configuration suppresses further upward diffusion of the water flow guided to the top of the turbine, enabling more efficient rotation of the output shaft.

[0045] In a preferred embodiment of the present invention, the upper flow straightening section is provided with an inlet opening that opens on the front flow straightening section side, allowing the water flow to flow in, and an outlet opening that opens downward on the upper side of the turbine body, at a predetermined distance behind the inlet opening, so that the inside of the section is configured as a flow path.

[0046] This configuration guides the water flow diagonally downward from the top of the turbine to the rear, applying water pressure to the water receiving body, thus enabling efficient rotation of the output shaft.

[0047] In a preferred embodiment of the present invention, the upper inner surface of the flow path is substantially curved downward as it moves from the inlet opening to the outlet opening.

[0048] This configuration allows the water flow to be guided from the top to the rear of the turbine without further diffusion, thereby applying water pressure to the water receiving body and enabling more efficient rotation of the output shaft.

[0049] In a preferred embodiment of the present invention, the upper flow straightening section is provided with a hanging section that hangs substantially downward from the rear end of the outflow opening and is positioned adjacent to the rear side of the turbine body.

[0050] With this configuration, the water flow exiting the upper flow straightening section is guided downwards, and consequently, downward water pressure is applied to the water receiving body, enabling more efficient rotation of the output shaft.

[0051] In a preferred embodiment of the present invention, the rectifier unit has a rear lower rectifier section located behind the turbine body when viewed in the axial direction, In the aforementioned rear lower flow straightening section, the inner circumferential surface facing the turbine body is substantially curved toward the rear.

[0052] With this configuration, the water flow is guided downwards to the turbine body, and water pressure is applied to the water receiving body in the same direction, which leads to the continued rotation of the output shaft.

[0053] In a preferred embodiment of the present invention, the rectifier unit has a front lower rectifier section located in front of the turbine body and below the front rectifier section when viewed from the axial direction, The aforementioned forward lower flow straightening section has an inclined surface whose upper surface gradually slopes upward toward the water receiving section as it approaches the turbine body, and a section that extends upward connected to the rear end of this inclined surface. Including a vertical plane, The inclined surface and the vertical surface, together with the lower surface of the forward flow straightening section, constitute a flow path.

[0054] This configuration generates a nearly vertical upward water flow from below, applying water pressure to the water receiving body, thus enabling more efficient rotation of the output shaft.

[0055] In a preferred embodiment of the present invention, a plurality of rectifying plates are formed on the inclined surface of the forward rectifying section, arranged along the axial direction and adjacent to the water receiving section.

[0056] This configuration suppresses turbulence in the water flow out from the forward rectifier, leading to the continued stable rotation of the output shaft. [Effects of the Invention]

[0057] According to the present invention, it is possible to provide a water flow energy conversion unit that exhibits high energy conversion efficiency in water. [Brief explanation of the drawing]

[0058] [Figure 1] This is an overall perspective view of the water flow energy conversion unit according to Embodiment 1. [Figure 2] This figure shows the water receiving section and output shaft of the turbine body according to Embodiment 1, (a) an enlarged perspective view showing a part of it, and (b) a cross-sectional view along line PP'. [Figure 3] This figure shows the output shaft of the turbine body according to Embodiment 1, and is (a) a perspective view and (b) a left side view. [Figure 4] This is a left side view showing the sliding operation of the water receiving section according to Embodiment 1. [Figure 5] This figure shows an example of a modification of the water receiving section and output shaft of the turbine body according to Embodiment 1, where (a) is an enlarged perspective view showing a part, and (b) is a cross-sectional view taken along the line QQ'. [Figure 6] This figure shows the output shaft in an example of a modified turbine body according to Embodiment 1, and is (a) a perspective view and (b) a left side view. [Figure 7] These are a left side view and a cross-sectional view showing the reversal operation of the water receiving section according to Embodiment 1. [Figure 8] This is a left side view showing the sliding operation of the water receiving section according to Embodiment 1. [Figure 9] This is a left side view showing the operation of the auxiliary unit according to Embodiment 1. [Figure 10] This is an enlarged plan view showing a part of the water flow energy conversion unit according to Embodiment 1. [Figure 11] This figure shows the turbine body according to Embodiment 1, and (a) is a left side view, and (b) is a schematic left side view. [Figure 12] This is an explanatory diagram of the operation of the water flow energy conversion unit according to Embodiment 1. [Figure 13] This is an explanatory diagram of the operation of the water flow energy conversion unit according to Embodiment 1. [Figure 14] This is an explanatory diagram of the operation of the water flow energy conversion unit according to Embodiment 1. [Figure 15] This is an explanatory diagram of the operation of the water flow energy conversion unit according to Embodiment 1. [Figure 16] This figure shows the change over time of the rotational moment generated by each water receiving part in Embodiment 1, and their sum. [Figure 17] This is an overall perspective view of the water flow energy conversion unit according to Embodiment 2. [Figure 18] This figure shows a water flow energy conversion unit according to Embodiment 2, where (a) is a left side view and (b) is a top view. [Figure 19] This is a perspective view showing the water receiving section and a part of the output shaft of the turbine body according to Embodiment 2. [Figure 20] This is an enlarged plan view showing the water receiving section and output shaft of the turbine body according to Embodiment 2. [Figure 21] This is an explanatory diagram of the operation of the water flow energy conversion unit according to Embodiment 2. [Figure 22] This is an overall perspective view of the water flow energy conversion unit according to Embodiment 3. [Figure 23] This diagram shows the water receiving section of the turbine body according to Embodiment 3, and includes (a) an enlarged left side view showing a portion, (b) an enlarged rear view showing a portion, and (c) an enlarged left side view showing the operating mode. [Figure 24] This is an explanatory diagram of the operation of the water flow energy conversion unit according to Embodiment 3. [Figure 25] This is an overall perspective view of the water flow energy conversion unit according to Embodiment 4. [Figure 26] This is an enlarged perspective view showing the water receiving section and a portion of the output shaft of the turbine body according to Embodiment 4. [Figure 27] This is a plan view of the water flow energy conversion unit according to Embodiment 5. [Modes for carrying out the invention]

[0059] <Embodiment 1> The water flow energy conversion unit according to Embodiment 1 of the present invention will be described below with reference to Figures 1 to 16. In these figures, the symbol X indicates the water flow energy conversion unit according to this embodiment.

[0060] In the diagrams above, the direction of water flow is indicated by a dashed-dotted arrow. Furthermore, for the sake of convenience in the following explanation, the x-axis direction in Figure 1 will be defined as the left-right direction (or axial direction), and the y-axis direction as the front-back direction, with the direction indicated by the x-axis arrow being to the left and the direction indicated by the y-axis arrow being forward. In other words, in this embodiment, the water flow is from front to back, except in Figure 15.

[0061] <<Structure>> The configuration of the water flow energy conversion unit X will be explained below using Figures 1 to 10.

[0062] As shown in Figure 1, the water flow energy conversion unit X in this embodiment comprises a water turbine body A, an auxiliary unit B that assists in the rotation of the output shaft A1 of the water turbine body A, and a flow straightening unit C that controls the water flow, all of which are installed in water such as the sea or a river.

[0063] In Figure 1, the first magnetic section B1 and the magnetic section support B3 in auxiliary unit B are shown with thick lines, and the rectifier unit C is shown with a gray line. Furthermore, the support section A3 in the turbine body A and the upper rectifier section C2 in the rectifier unit C are constructed using translucent plate-like bodies made of acrylic or the like, and are shown as transparent, but the materials of these components are not particularly limited.

[0064] <<<Waterwheel body A>>> The turbine body A has a substantially cylindrical output shaft A1 extending substantially horizontally (axially) at both ends, a plurality of water receiving sections A2 provided at predetermined intervals along the axial direction of the output shaft A1, and a support section A3 that pivotally supports the output shaft A1 so that it can rotate around its central axis P.

[0065] The output shaft A1 is connected at one end to a generator (not shown) which is rotationally driven by its rotational movement. The generator may also be installed indirectly connected to the output shaft A1 via a power transmission mechanism such as a gear or chain.

[0066] In this embodiment, the water receiving section A2 is provided in three units at predetermined intervals along the axial direction of the output shaft A1, and each unit has a water receiving body A21 that receives the water flow and a connecting section A22 that connects the water receiving body A21 to the output shaft A1. The configuration of the water receiving section A2 and its connection to the output shaft A1 will be described in detail using Figures 2 to 10. Furthermore, while these diagrams illustrate the water receiving section A2, the other water receiving sections have a similar configuration.

[0067] Support sections A3 are roughly rectangular, plate-like bodies erected from a predetermined mounting surface Z, and are provided in pairs with a gap between them in the left-right direction. Furthermore, a through-hole p is provided at the top of the support section A3 through which the output shaft A1 is inserted, thereby supporting the output shaft A1. Furthermore, a bearing may be provided in the through-hole p as appropriate, and the output shaft A1 may be inserted through it to allow the output shaft A1 to rotate more stably.

[0068] As shown in Figure 2(a), the water receiving body A21 includes the water receiving body main body A21a, the flow straightening plate A21b, and the streamlined section A21c. Although a pair of water receiving bodies A21 are provided at the connecting section A22, one of the water receiving bodies A21 will be described in detail below.

[0069] The water receiving body A21a is configured as a container that receives water flow by opening in a direction approximately perpendicular to the direction in which the connecting portion A22, to which it is provided, extends, when viewed from the axial direction of the output shaft A1.

[0070] The rectifier plate A21b consists of two roughly rectangular, thin plates that divide the internal region of the water receiving body A21a along the axial direction of the output shaft A1.

[0071] The streamlined section A21c is provided on the side opposite the open end of the water receiving body A21a, and as it extends in a direction approximately perpendicular to the direction in which the connecting section A22 extends, it tapers to form a streamlined shape.

[0072] In this embodiment, the flat plates that constitute the left and right sides of the water receiving body A21a, and the flat plate that constitutes the side facing the side that connects to the connecting part A22, extend further from the open end of the water receiving body A21a. As a result, along with each rectifier plate A21b, three roughly L-shaped openings are formed.

[0073] The following describes the connecting section A22 in detail. As shown in Figure 2, the connecting portion A22 is a slide rail that extends in a direction substantially perpendicular to the axial direction. Furthermore, a pair of water receiving bodies A21 are provided at the connecting section A22, and are positioned diagonally opposite each other in a manner that is approximately point-symmetric with respect to the central axis P when viewed from the axial direction. Note that in Figure 2(b), which is a cross-sectional view along line PP', the water receiving body A21 is not shown.

[0074] Here, the output shaft A1 slidably supports a connecting portion A22, which is provided with a pair of water receiving bodies A21, along its extending direction. Furthermore, as shown in Figure 2(b), a bracket h is interposed on the output shaft A1 to slidably support the connecting portion A22.

[0075] In addition, each side of the connecting section A22 is provided with a roughly rectangular parallelepiped-shaped stopper section k. Furthermore, the pair of stopper sections k are positioned diagonally opposite the connecting section A22, in a manner that is approximately point-symmetric with respect to the central axis P when viewed from the axial direction, similar to each water receiving body A21. Furthermore, in the following, the connecting portion A22, the bracket h, and the stopper portion k will be referred to as the sliding means S.

[0076] As shown in Figure 3(a), three brackets h are provided, corresponding to the number of water receiving sections A2, and are interposed on the output shaft A1 at predetermined intervals. Furthermore, the axial orientation of each bracket h is different from that of the central axis P when viewed from the side.

[0077] In Figure 3(b), the left bracket h and its axial direction are shown with a thick line, the central bracket h and its axial direction are shown with a thick line, and the right bracket h and its axial direction are shown with a thin line. More specifically, the left bracket h is connected to the output shaft A1 in a configuration where the central bracket h is rotated 60 degrees counterclockwise in a side view, and the right bracket h is connected to the output shaft A1 in a configuration where the central bracket h is rotated 60 degrees clockwise in a side view. Furthermore, in this embodiment, it is preferable that the directions in which each connecting portion A22 extends are different from each other depending on the mounting configuration of each bracket h described above, but at least two of the extending directions are arranged to be different when viewed from the axial direction.

[0078] Furthermore, ensuring that all connecting shafts A22 of the turbine body A are installed at equal angles around the central axis P helps to suppress rotational irregularities in the output shaft A1. This means that each water receiving section A2, which has one connecting section A22, is connected to the output shaft A1 in such a way that its bracket h is offset by an equal angle around the central axis P. The method for calculating these equal angles is as follows. [Equal angles = 360 degrees / Total number of water receiving bodies A21 installed on the turbine body A]

[0079] In this embodiment, the total number of water receiving bodies A21 provided on the turbine body A can be determined as follows. Each water receiving section A2 is provided with one pair of water receiving bodies A21. In other words, each water receiving section A2 is provided with two water receiving bodies A21. On the other hand, the number of water receiving sections A2 provided on the turbine body A is 3. Therefore, the total number of water receiving bodies A21 provided on the turbine body A is 6. Therefore, the number of equal angles is 60 degrees (360 degrees / (2 × 3)).

[0080] In this embodiment, we have shown an example where there are three water receiving sections A2, and each water receiving section A2 is arranged with an equal angle offset to suppress rotational unevenness of the output shaft A1. However, we are not limited to this, and there may be two, four, five or more sections. The method for calculating the intervals between equal angles is the same as described above for the case where there are three water receiving sections A2. That is, if there are two water receiving sections A2, the intervals are 90 degrees (360 degrees / (2 × 2)), if there are four, the intervals are 45 degrees (360 degrees / (2 × 4)), and if there are five, the intervals are 36 degrees (360 degrees / (2 × 5)). Thus, as the number of water receiving sections A2 increases, it becomes possible to rotate the output shaft A1 more evenly and stably.

[0081] With the configuration of the sliding means S described above, the water receiving portion A2 slides in the direction in which the connecting portion A22 extends, as shown in Figure 4. In other words, as shown in Figure 4(a), the water receiving section A2 slides to the left in Figure 4(a) until the stopper section k located on the right side of the pair of stopper sections k comes into contact with the bracket h. Furthermore, as shown in Figure 4(b), the water receiving section A2 slides to the right in Figure 4(b) until the left stopper section k of the pair of stopper sections k comes into contact with the bracket h. In this way, the sliding distance of the connecting portion A22 is controlled by each stopper portion k.

[0082] In this case, if the water flow energy conversion unit X is located in water where the direction of the water flow changes due to the ebb and flow of the tide, the water receiving section A2 can be reversed by using the reversal means W instead of the bracket h. This allows each water receiving body A21 to receive water pressure from a water flow that produces a positive rotational moment, just as it did before the direction of the water flow was reversed. The reversal means W will be explained below with reference to Figures 5 and 6.

[0083] The reversal means W is configured to allow each water receiving body A21 to be reversed about the axis in the direction in which the connecting portion A22 extends. More specifically, a roughly cylindrical hollow motor is interposed on the output shaft A1 as a reversing means W, and as shown in Figure 5(b) in particular, a bracket i that slidably supports the connecting portion A22 is fixed to its inner circumferential surface. Note that the water receiving body A21 is not shown in Figure 5(b).

[0084] As shown in Figure 6(a), three reversing means W are provided, corresponding to the number of water receiving sections A2, and are interposed on the output shaft A1 at predetermined intervals. Furthermore, the axial orientation of each reversal mechanism W is different from that of the central axis P when viewed from the side.

[0085] In Figure 6(b), the left reversing mechanism W and its axial direction are shown with a thick line, the central reversing mechanism W and its axial direction are shown with a thick line, and the right reversing mechanism W and its axial direction are shown with a thin line. More specifically, the left reversing mechanism W is connected to the output shaft A1 in a configuration in which the central reversing mechanism W is rotated 60 degrees counterclockwise in a side view, and the right reversing mechanism W is connected to the output shaft A1 in a configuration in which the central reversing mechanism W is rotated 60 degrees clockwise in a side view. Furthermore, the method for calculating the angle at which the connecting portion A22 is evenly positioned on the output shaft A1 is the same as in the case of bracket h.

[0086] With the configuration of the reversal means W described above, the water receiving section A2 operates as shown in Figure 7. In other words, the water receiving section A2 rotates around the axial direction of the reversing means W as the inner circumferential surface of the reversing means W rotates, causing the bracket i fixed to the inner circumferential surface to rotate, and the entire water receiving section A2 rotates around the axial direction of the reversing means W, resulting in a side view reversal from Figure 7(a) through Figure 7(b) to Figure 7(c).

[0087] Furthermore, the reversal mechanism W is configured to operate either simultaneously or individually for all water receiving sections A2 via remote control. Furthermore, the sliding motion operates in the same manner as shown in Figure 4, as shown in Figure 8, due to the connecting part A22, bracket i, and stopper part k. Note that bracket i is fixed to the inner circumferential surface of the hollow motor and is therefore not shown in Figure 8, which is a side view.

[0088] <<<Auxiliary Unit B>>> The auxiliary unit B comprises three first magnetic parts B1 configured separately from the turbine body A, second magnetic parts B2 provided on each water receiving body A21 and having the same polarity as the first magnetic parts B1, and three magnetic part supports B3 that support the first magnetic parts B1. The structure is described in detail below.

[0089] The first magnetic part B1 is a magnet whose inner circumferential surface facing the turbine body A is curved substantially toward the rear, and is supported by each magnetic part support B3 so as to be adjacent to the rear of the turbine body A and facing the direction of the water flow.

[0090] The second magnetic part B2 is a roughly rectangular parallelepiped magnet provided on the outside of the side facing the side that connects to the connecting part A22 in each water receiving body A21.

[0091] The shape and size of the first magnetic part B1 and the second magnetic part B2 vary depending on the speed of the water flow, etc. For example, if the water flow is fast, the sliding length of the water receiving part A2 will inevitably be shorter, and the first magnetic part B1 does not need to be rectangular and curved, but may be a plate-like shape close to a square.

[0092] The magnetic support B3 is a roughly rectangular prism-shaped body that is spaced apart in the left-right direction and erected from the mounting surface Z, with the first magnetic part B1 attached to the upper front side of it.

[0093] As shown in Figure 9, the auxiliary unit B described above assists in the rotation of the output shaft A1. That is, when the output shaft A1 rotates due to the water flow from the state shown in Figure 9(a), the second magnetic part B2 provided on the water receiving body A21a faces the first magnetic part B1, resulting in the state shown in Figure 9(b). As a result, the second magnetic part B2 and the first magnetic part B1 repel each other, causing the water receiving part A2 to slide forward. Subsequently, as the output shaft A1 rotates, the water receiving section A2 slides diagonally upward and forward, resulting in the state shown in Figure 9(c).

[0094] In the clockwise rotation shown in Figure 9, the magnetic repulsion accelerates the sliding motion, causing the upper water receiving body A21 to move away from the output shaft A1, lengthening its upper trajectory, while the lower water receiving body A21 moves closer to the output shaft A1, shortening its lower trajectory. This increases the total volume of water received by the water flow that gives a positive rotational moment to the water receiving section A2, and decreases the total volume of water received by the water flow that gives a negative rotational moment. As a result, the rotational speed of the output shaft A1 can be increased.

[0095] Note that in Figure 9, the support section A3, the central water receiving section A2, the right-side water receiving section A2, and the flow straightening unit C are omitted from the illustration. Furthermore, in the central water receiving section A2 and the right-side water receiving section A2, the second magnetic section B2 and its corresponding first magnetic section B1 repel each other, leading to the same behavior as shown in Figures 9(a) to 9(c).

[0096] <<<Rectifier Unit C>>> The rectifier unit C has a front rectifier section C1 positioned adjacent to the front of the turbine body A, and an upper rectifier section C2 that covers the upper part of the turbine body A.

[0097] The forward airflow straightening section C1 includes a forward airflow straightening section body C11 which is roughly plate-shaped, and a pair of support plates C12 which are provided on the left and right sides of the forward airflow straightening section body C11, supporting the forward airflow straightening section body C11 and erected from a predetermined mounting surface Z which is roughly plate-shaped.

[0098] The front rectifier section body C11 is configured as an inclined surface whose upper surface gradually slopes upward as it approaches the turbine body A. Furthermore, seven rectifier plates t1 are provided on the upper part of the inclined surface of the front rectifier unit body C11. In this embodiment, the front rectifier body C11 is configured as a single flat plate-like body, but it may be partially curved or have uneven surfaces.

[0099] Each rectifier plate t1 is a substantially thin plate-like body erected from an inclined surface such that its direction perpendicular to its surface is substantially parallel to the axial direction, and is arranged at predetermined intervals along the axial direction.

[0100] The upper rectifier section C2 is composed of a roughly thin plate-like body that curves upward in an arc when viewed from the axial direction, and flat plates joined to its left and right sides. The lower end surfaces of each of these flat plates are attached to the upper end surfaces of each support section A3. Furthermore, the upper rectifier section C2 is provided with two partition plates t2.

[0101] Each partition plate t2 is a substantially thin plate-like body provided on the inner circumferential surface of the upper flow straightening section C2 such that its orientation perpendicular to its surface is substantially parallel to the axial direction, and is configured to be positioned between each water receiving section A2 in a plan view.

[0102] As shown in Figure 10, the installation of each rectifier plate t1 and each partition plate t2, as well as the rectifier plate A21b, suppresses turbulence in the water flow inside each water receiving body A21, thereby aligning the water flow in a direction approximately perpendicular to the axial direction. With the water flow direction thus aligned, water pressure is applied to each water receiving section A2, and a stronger positive rotational moment is transmitted to the output shaft A1. Note that in Figure 10, only the left side of the water flow energy conversion unit X is shown in a partially enlarged view.

[0103] Furthermore, when the reversal means W is used in water where the direction of the water flow is reversed, a rearward flow straightening section C3 is installed behind the turbine body A, with the orientation of the front flow straightening section C1 reversed. Note that the rearward flow straightening section C3 is not shown in Figure 1.

[0104] <<Operational Mode>> The operation of the water flow energy conversion unit X will be explained below using Figures 11 to 15.

[0105] Here, Figure 11(a) is a left side view of the turbine body A, where the left bracket h and the water receiving section A2 inserted through it are shown with thick lines, the central bracket h and the water receiving section A2 inserted through it are shown with thick lines, and the right bracket h and the water receiving section A2 inserted through it are shown with thin lines. Furthermore, Figure 11(a) shows each water receiving section A2 in a state where there is no bias with respect to the central axis P, that is, the distance from the central axis P to each end of a single water receiving section A2 is approximately the same.

[0106] Furthermore, in explaining the operation in Figures 12 to 15, for the sake of explanation, only the water receiving section A2 and the output shaft A1 of the turbine body A will be schematically shown as in Figure 11(b). Specifically, each water receiving body A21a is represented as a rectangle, each streamlined section A21c as a triangle, and each connecting section A22 as a straight line.

[0107] Furthermore, in the explanation of the operation in Figures 12 to 15, the left water receiving section A2 will be referred to as water receiving section A2a, the central water receiving section A2 as water receiving section A2b, and the right water receiving section A2 as water receiving section A2c. Furthermore, since the bracket h interposed on the output shaft A1 is omitted, the sliding distance of the water receiving section A2 on the drawing is the distance between two short lines extending perpendicularly from the line indicating each connecting section A22, minus the length of the portion of the output shaft A1 located between them. Furthermore, in one water receiving section A2, the water receiving body A21 with hatching will be referred to as "one water receiving body A21," and the water receiving body A21 with white outline will be referred to as "the other water receiving body A21." Furthermore, the direction in which one water receiving body A21 is provided will be simply referred to as "one side," and the direction in which the other water receiving body A21 is provided will be simply referred to as "the other side."

[0108] Note that in each figure, the rectifier plates t1 and partition plates t2 are omitted. Furthermore, in each figure, the buoyancy experienced by each water-receiving part A2 that guides the sliding motion is indicated by a dotted arrow. Furthermore, "maximum sliding" as described below refers to the state in which the lower of the two stopper parts k provided on each connecting part A22 is in contact with the bracket h.

[0109] First, as shown in Figure 12(a), the water receiving section A2a slides to its maximum extent in one direction, while the other water receiving body A21 receives the water flow and transmits a clockwise rotational moment to the output shaft A1. Furthermore, the water receiving section A2b slides to its maximum extent in one direction, while the other water receiving body A21 receives the water flow and transmits a clockwise rotational moment to the output shaft A1. Furthermore, the water receiving section A2c does not generate a clockwise rotational moment at this point.

[0110] Next, as shown in Figure 12(b), the water receiving section A2a slides to its maximum extent in one direction, while the water receiving body A21 receives the water flow and transmits a clockwise rotational moment to the output shaft A1. Furthermore, the water receiving section A2b does not generate a clockwise rotational moment at this point. Furthermore, the water receiving section A2c slides upward due to buoyancy, while the other water receiving body A21 receives the water flow, transmitting a clockwise rotational moment to the output shaft A1.

[0111] Next, as shown in Figure 12(c), the water receiving section A2a is positioned so that the direction in which the installation surface Z and the direction in which the connecting section A22 extends are approximately parallel. One of the water receiving bodies A21 receives the water flow that has come along the upper flow straightening section C2 and transmits a clockwise rotational moment to the output shaft A1. Furthermore, at this point, the water receiving section A2b does not generate a clockwise rotational moment, and slides to the other side due to buoyancy. Furthermore, the water receiving section A2c slides to its maximum extent toward the other side, while the other water receiving body A21 receives the water flow, transmitting a clockwise rotational moment to the output shaft A1.

[0112] Next, as shown in Figure 13(a), the water receiving section A2a does not generate a clockwise rotational moment at this point, and slides to the other side due to buoyancy. Furthermore, the water receiving section A2b slides to its maximum extent toward the other side, while the other water receiving body A21 receives the water flow, transmitting a clockwise rotational moment to the output shaft A1. Furthermore, the water receiving section A2c slides to its maximum extent toward the other side, while the other water receiving body A21 receives the water flow, transmitting a clockwise rotational moment to the output shaft A1.

[0113] Next, as shown in Figure 13(b), the water receiving section A2a slides to its maximum extent toward the other side, while the other water receiving body A21 receives the water flow and transmits a clockwise rotational moment to the output shaft A1. Furthermore, the water receiving section A2b slides to its maximum extent toward the other side, while the other water receiving body A21 receives the water flow, transmitting a clockwise rotational moment to the output shaft A1. Furthermore, the water receiving section A2c does not generate a clockwise rotational moment at this point.

[0114] Next, as shown in Figure 13(c), the water receiving section A2a slides to its maximum extent toward the other side, while the other water receiving body A21 receives the water flow and transmits a clockwise rotational moment to the output shaft A1. Furthermore, the water receiving section A2b does not generate a clockwise rotational moment at this point. Furthermore, the water receiving section A2c slides upward due to buoyancy, while the other water receiving body A21 receives the water flow and transmits a clockwise rotational moment to the output shaft A1.

[0115] Next, as shown in Figure 14(a), the water receiving section A2a is positioned so that the direction in which the installation surface Z and the connecting section A22 extend are approximately parallel, and the other water receiving body A21 receives the water flow that has come along the upper flow straightening section C2, transmitting a clockwise rotational moment to the output shaft A1. Furthermore, at this point, the water receiving section A2b does not generate a clockwise rotational moment, and slides toward the other water receiving body A21 due to buoyancy. Furthermore, the water receiving section A2c slides to its maximum extent in one direction, while the water receiving body A21 receives the water flow, transmitting a clockwise rotational moment to the output shaft A1.

[0116] Next, as shown in Figure 14(b), the water receiving section A2a does not generate a clockwise rotational moment at this point, but slides to one side due to buoyancy. Furthermore, the water receiving section A2b slides to its maximum extent in one direction, while the other water receiving body A21 receives the water flow and transmits a clockwise rotational moment to the output shaft A1. Furthermore, the water receiving section A2c slides to its maximum extent in one direction, while the water receiving body A21 receives the water flow, transmitting a clockwise rotational moment to the output shaft A1.

[0117] Then, it returns to the same state as shown in Figure 12(a), and the rotational movement of one full rotation is completed.

[0118] Figure 15 is a schematic diagram similar to Figures 12 to 14, showing the case where the water flow changes from a rearward to a forwardward flow, and the reversal operation by the reversal means W shown in Figure 7 is performed at each water receiving section A2.

[0119] In this case, the rotational movement is the same as shown in Figures 12 to 14, as it is only the front and back reversed, so the explanation will be omitted. Furthermore, although not shown in Figure 1, if such operation is assumed, it is necessary to place a rearward flow straightening section C3, which is the front flow straightening section C1 with its orientation reversed, behind the turbine body A, and to place an auxiliary unit B in front of the turbine body A with its orientation reversed.

[0120] Figure 16 shows the change in rotational moment generated by each water receiving section A2 over time, with the x-axis representing time and the y-axis representing rotational moment. Positive values ​​represent clockwise rotational moments, as explained in Figures 12 to 14, and negative values ​​represent counterclockwise rotational moments. Furthermore, the extra-thick line shows the change in rotational moment of the water receiving section A2a over time, the thick line shows the change in rotational moment of the water receiving section A2b over time, and the thin line shows the change in rotational moment of the water receiving section A2c over time. The dotted line shows the sum of the changes in rotational moments of each of these three water receiving sections A2 over time.

[0121] Thus, even if one water receiving section A2 is in a position that does not generate a rotational moment, or in a position that generates a counterclockwise rotational moment, the other water receiving sections A2 repeatedly slide upward along the direction in which the connecting section A22 extends, generating a clockwise rotational moment. As a result, a water flow is generated, and as long as the sum of the clockwise rotational moments generated by each water receiving section A2 remains positive, the entire turbine body A will continue to rotate. Furthermore, for example, from Figure 12(c) to Figure 13(a), the repulsive force of the magnets from auxiliary unit B accelerates the sliding motion of the water receiving section A2a, thereby also accelerating the timing at which the water receiving body A21, located in front, receives the water flow that leads to a clockwise rotational moment. As a result, the value of the positive rotational moment is increased.

[0122] <<Effect>> Based on the above, the water flow energy conversion unit X of the above embodiment provides the following effects.

[0123] <<<Main Effects>>> In other words, according to this embodiment, the water flow that has passed through the forward straightening section C1 and flowed in an oblique upward direction is received by the water receiving body A21 of the pair of water receiving bodies A21 that is located closer to the forward straightening section C1, and is guided upward towards the turbine body A. Subsequently, the water flow also comes into contact with the upper straightening section C2, and water pressure is applied to the water receiving body A21. Then, the water receiving body A21 rotates towards the rear side of the turbine body A, passing over the top of the turbine body A and continuing to receive water pressure in an oblique downward direction. This movement causes rotation of the output shaft A1, which is transmitted to the generator, enabling power generation.

[0124] As the water receiving section A2 slides, the upper water receiving section A21 of the pair of water receiving bodies A21 has a longer trajectory in the upper section, increasing the total volume of water received that gives rise to a positive rotational moment. On the other hand, the lower water receiving section A21 has a shorter trajectory in the lower section, decreasing the total volume of water received that gives rise to a negative moment. This increases the rotational speed of the output shaft A1, which is then transmitted to the generator, enabling more efficient power generation.

[0125] Furthermore, while the output shaft A1 rotates once, the water receiving section A2 performs two sliding movements, which in turn generates a lever-like action. More specifically, the central axis P acts as the fulcrum, and of the pair of water-receiving bodies A21, the upper water-receiving body A21 acts as the point of force application. In other words, as the output shaft A1 rotates once, the roles of the points of force application on the two water receiving bodies A21 alternate. Therefore, even if one of the three water receiving sections A2 does not generate a positive clockwise rotational moment, the other two water receiving sections A2 can compensate for this and generate positive rotational moments, allowing the output shaft A1 to rotate stably and continuously.

[0126] The magnetic repulsion force from auxiliary unit B accelerates the sliding motion, thereby increasing the total volume of water received by the water receiving section A2 that generates a positive rotational moment, and decreasing the total volume of water received by the water receiving section A2 that generates a negative rotational moment. This also increases the rotational speed of the output shaft A1, which is then transmitted to the generator, enabling more efficient power generation.

[0127] Furthermore, even if the direction of the water flow changes to the opposite direction due to the reversal means W, the water receiving section A2 continues to receive a positive rotational moment, enabling efficient power generation operation.

[0128] Furthermore, the rectifier plate A21b installed inside the water receiving body A21a, the rectifier plate t1 installed on the inclined surface of the front rectifier section body C11, and the partition plate t2 installed on the inner circumferential surface of the upper rectifier section C2 suppress turbulence in the water flow and improve the rectification of the water flow. As a result, the rotation speed of the output shaft A1 is also increased and transmitted to the generator, enabling efficient power generation.

[0129] Furthermore, the stopper section k ensures a constant sliding distance for each water receiving section A2 regardless of the strength of the water flow, suppressing rotational irregularities of the output shaft A1 and enabling stable power generation.

[0130] <<<Other effects>>> Furthermore, while conventional water turbine power generation methods using propellers require a separate transmission and generator for each turbine, this embodiment allows multiple water receiving units A2 to be connected to a single output shaft A1. This limits the number of transmissions and generators installed on the turbine body A to one each. Consequently, maintenance costs for these components due to salt damage and other factors can be significantly reduced.

[0131] Furthermore, unlike existing power generation methods using propellers, the water receiving body A21 has an open and simple configuration made of a combination of flat plates. Therefore, even if fish or other aquatic life get into the turbine body A, it is possible to naturally discharge them to the outside while preventing damage.

[0132] The shapes and dimensions of the components shown in Embodiment 1 above are merely examples and can be modified in various ways based on design requirements, etc.

[0133] For example, in accordance with the change in the number of water receiving sections A2, the length of the output shaft A1, the number of reversing means W and auxiliary units B, and the lengths of the front rectifier section C1 and upper rectifier section C2 in the front-rear direction will naturally also be changed.

[0134] Furthermore, although the water receiving body A21 in this embodiment is shown as being composed of a combination of multiple plate-like bodies, it may also have a shape that includes depressions or indentations to receive flowing water.

[0135] Furthermore, the connecting portion A22 is not necessarily an essential component; the water receiving body A21 may be directly attached to the output shaft A1, or the connecting portion A22 may be present but not have a sliding function.

[0136] Furthermore, if the sliding distance of the connecting portion A22 can be controlled by the water receiving body A21 contacting the bracket h or the output shaft A1, then it is not necessary for the stopper portion k to be installed on the connecting portion A22.

[0137] Furthermore, the stopper portion k does not necessarily have to be located at diagonally opposite positions with respect to the central axis P in a substantially point-symmetrical manner. In other words, the stopper portion k can be located at any position around the connecting portion A22 as long as the same sliding distance can be maintained.

[0138] Furthermore, the forward rectifier unit C11 is not limited to a single unit; multiple units can be installed in a stepped configuration.

[0139] Furthermore, the position of the generator connected to output shaft A1 is not limited to the end of output shaft A1, and there are no particular restrictions on the connection position on output shaft A1.

[0140] <Embodiment 2> The water flow energy conversion unit X according to Embodiment 2 of the present invention will be described below with reference to Figures 17 to 21. In this embodiment, components that are essentially the same as those in the previous embodiment are denoted by the same reference numerals, and their descriptions are simplified.

[0141] In this embodiment, compared to Embodiment 1, the configuration of the water receiving section A2 in the turbine body A, the method of connecting it to the output shaft A1, and the configurations of the auxiliary unit B and the rectifier unit C have been significantly changed.

[0142] The configuration of the water flow energy conversion unit X will be explained below using Figures 17 to 20.

[0143] <<Structure>> Figure 17 is an overall perspective view of the water flow energy conversion unit X according to this embodiment, showing the turbine body A, auxiliary unit B, and rectifier unit C in disassembled form. Figure 18 shows (a) a schematic side view and (b) a plan view of the interior of the upper flow straightening section C2, which will be described later, in the water flow energy conversion unit X according to this embodiment. In Figure 18(a), the rectifier plate t1 of the forward rectifier section C1, which will be described later, is omitted from the illustration, and the upper rectifier section C2 is shown as a cross-sectional view showing its interior.

[0144] <<<Waterwheel body A>>> As shown in Figure 19, the water receiving section A2 is configured to combine the two water receiving sections A2 shown in Embodiment 1. Furthermore, the water receiving section A2 is configured to be adjacent to the connecting section A22 (first connecting section and second connecting section) so that their extending directions are approximately perpendicular.

[0145] Here, using Figure 20, we will explain the method of connecting the water receiving body A21 and the connecting part A22, and the method of connecting the connecting part A22 and the output shaft A1.

[0146] In this embodiment, the water receiving section A2 is preferably arranged in the manner shown in Figure 20 when it rotates around the output shaft A1. In other words, it is preferable to offset the connection position of the connecting portion A22 to each water receiving body A21 from the center in the width direction (output axis direction) of the water receiving body A21, so that in a plan view, the centers in the width direction of each water receiving body A21 coincide, and to accommodate this, the distance between the two connecting portions A22 (first connecting portion and second connecting portion) connected to the output shaft A1 is also preferably left open when connected to the output shaft A1.

[0147] Furthermore, ensuring that all connecting shafts A22 of the turbine body A are positioned at equal angles around the central axis P helps to suppress rotational irregularities in the output shaft A1. This means that the brackets h connected to the output shaft A1 are arranged such that each water receiving section A2, which has two connecting sections (first and second), is also positioned at equal angles around the central axis P. The method for calculating these equal angles is as follows. [Equal angles = 360 degrees / Total number of water receiving bodies A21 installed on the turbine body A] Furthermore, for convenience, the calculations will be performed assuming that the directions in which the first connecting section A22 and the second connecting section A22 extend are not approximately perpendicular, but rather perpendicular (intersecting at a 90-degree angle).

[0148] In this embodiment, the total number of water receiving bodies A21 provided on the turbine body A can be determined as follows. Each water receiving section A2 has a connecting section A22 consisting of a first connecting section and a second connecting section. Since each of the first and second connecting sections is provided with a pair of water receiving bodies A21, each water receiving section A2 is provided with four water receiving bodies A21. On the other hand, the number of water receiving sections A2 provided on the turbine body A is 3. Therefore, the total number of water receiving bodies A21 provided on the turbine body A is 12. Therefore, the number of equal angles is 30 degrees (360 degrees / 4 × 3).

[0149] In this embodiment, an example is shown where there are three water receiving sections A2, but the number is not limited to this; there may be two, four, five or more, etc. In this case, if calculated using the same calculation method as in this embodiment, the equal angle intervals will be 45 degrees (360 degrees / 4 × 2) if there are two water receiving sections A2, 22.5 degrees (360 degrees / 4 × 4) if there are four, and 18 degrees (360 degrees / 4 × 5) if there are five.

[0150] As shown in Figure 19, each water receiving body A21 is provided with a water receiving auxiliary plate A21d that is erected along the direction of the opening from the opening end, and its base end surface is positioned to partition the opening along the axial direction. Furthermore, its inner surface is a curved surface that faces outward, and is configured to receive the flowing water that has passed through the flow straightening unit C.

[0151] In this way, by installing the water receiving auxiliary plate A21d on the water receiving body A21, the total volume of water received that gives rise to a positive rotational moment in the water receiving body A21 is significantly increased, and the rotation speed of the output shaft A1 is also increased, thus enabling high energy conversion efficiency.

[0152] <<<Auxiliary Unit B>>> As shown in Figure 17, the auxiliary unit B according to this embodiment has a modified configuration of the first magnetic part B1 and the magnetic part support B3.

[0153] More specifically, the magnetic support B3 is an elongated rod-shaped body with a roughly rectangular peripheral shape from which the base has been removed, and is positioned to straddle the rear lower rectifier section C4 from left to right. Furthermore, the first magnetic section B1 is a thin plate-like body whose inner circumferential surface facing the turbine body A is substantially curved toward the rear, and three of them are provided at predetermined intervals on the front side of the portion of the magnetic section support B3 that extends in the left-right direction. The shape and size of the first magnetic part B1 and the second magnetic part B2 will vary depending on the speed of the water flow, as in Embodiment 1. Furthermore, if the arrangement is suitable, the magnetic support B3 may be supported by fixing the first magnetic part B1 to the rear lower rectifier part C4, rather than being a long, slender rod-shaped body that straddles the rear lower rectifier part C4.

[0154] <<<Rectifier Unit C>>> As shown in Figure 17, the rectifier unit C according to this embodiment includes a front rectifier section C1 positioned adjacent to the front of the turbine body A, an upper rectifier section C2 covering the upper part of the turbine body A, a rear lower rectifier section C4 positioned behind the turbine body A, and a front lower rectifier section C5 positioned in front of the turbine body A and below the front rectifier section C1.

[0155] The forward rectifier section C1 includes forward rectifier section bodies C11a to C11c, which are roughly thin plate-shaped bodies arranged along the vertical direction, and a pair of support plates C12, which are roughly plate-shaped bodies provided on the left and right sides of the forward rectifier section bodies C11a to C11c, supporting the forward rectifier section bodies C11a to C11c and erected from the installation surface Z.

[0156] The forward flow straightening section bodies C11a to C11c are configured as inclined surfaces that gradually slope upward toward the top of the turbine body A as they approach the turbine body A. Furthermore, seven rectifier plates t1 are provided on the inclined surface of the front rectifier unit body C11. In this embodiment, the front rectifier body C11 is configured as a single flat plate-like body, but it may be partially curved or have uneven surfaces.

[0157] The upper rectifier section C2 includes a first upper rectifier section C21 and a second upper rectifier section C22. The structure is described in detail below.

[0158] The first upper flow straightening section C21 is a roughly rectangular cylindrical body that is elongated in the left-right direction. Its front opening is configured as the inlet opening O, and it has a lower side section that slopes gradually downward from the inlet opening O and extends to the upper part of the turbine body A. Furthermore, the interior of the first upper rectifier section C21 is provided with five partition plates t2 arranged at predetermined intervals in the left-right direction. Furthermore, as shown in Figure 18(b), the partition plates t2 consist of two plates positioned on the inside, which extend into the interior of the second upper rectifier section C22.

[0159] The second upper rectifier section C22 is composed of three side sections joined to the left and right side sections and the upper side section of the first upper rectifier section C21. Furthermore, the upper side surface of the second upper flow straightening section C22 is curved substantially downward as it moves from the inlet opening O to the outlet opening E. As a result, the area from the rear end of the lower side surface of the first upper flow straightening section C21 to the rear end of the upper side surface of the second upper flow straightening section C22 is configured as an outflow opening E that opens downwards.

[0160] Furthermore, a hanging portion n is provided on the rear of the upper side surface of the second upper flow straightening section C22, extending substantially downward from the rear end of the outflow opening E, and positioned adjacent to the rear side of the turbine body A.

[0161] The rear lower flow straightening section C4 includes a rear lower flow straightening section body C41, three water receiving plates C42 provided substantially horizontally on the rear lower flow straightening section body C41, and a pair of substantially plate-shaped support plates C43 provided on the left and right sides of the rear lower flow straightening section body C41, supporting the rear lower flow straightening section body C41 and erected from the installation surface Z.

[0162] The rear lower flow straightening section body C41 has an inner circumferential surface facing the turbine body A that is curved substantially toward the rear.

[0163] The water receiving plate C42 consists of three thin, plate-like bodies extending in the left-right direction, arranged vertically. One end surface of each plate is connected to the inner circumferential surface of the rear lower flow straightening section body C41, such that its surface direction is approximately parallel to the installation surface of the water flow energy conversion unit X.

[0164] The front lower flow rectifier section C5 includes the front lower flow rectifier section body C51 and the auxiliary section C52.

[0165] The front lower flow straightening section body C51 is composed of an inclined surface section C51a and a support plate C51b connected to the rear end of the inclined surface section C51a.

[0166] The inclined surface C51a is configured as an inclined surface whose upper surface gradually slopes upward toward the turbine body A as it approaches the turbine body A.

[0167] The support plate C51b is a roughly plate-shaped body that supports the inclined surface C51a and is erected on the installation surface Z.

[0168] The auxiliary section C52 is a roughly L-shaped plate-like body connected to the lower surface of the front flow straightening section body C11c. As a result, a flow path is formed between the lower surface of the auxiliary section C52 and the upper surface of the inclined surface section C51a, as shown in Figure 18(a). The water flow that has passed through this flow path changes direction vertically upward when it comes into contact with the support plate C51b, and applies water pressure to the water receiving body A21 from below.

[0169] <<Operational Mode>> The water receiving unit A2 configured in this way operates in the manner shown in Figure 21. In the explanation of the operation in Figure 21, the water receiving section A2 on the left will be referred to as water receiving section A2a, and the water receiving section A2 on the right will be referred to as water receiving section A2b. Furthermore, the distinction between "one side" and "the other side" will be explained in the same way as in Figures 12 to 14.

[0170] That is, as shown in Figure 21(a), the water receiving section A2a slides to its maximum extent in one direction (i.e., until the stopper section k located below contacts the bracket h), while the water receiving body A21 receives the water flow and transmits a clockwise rotational moment to the output shaft A1. Furthermore, at this point, the water receiving section A2b does not generate a clockwise rotational moment, but slides to one side due to buoyancy.

[0171] Next, as shown in Figure 21(b), the water receiving section A2a is positioned so that the direction in which the installation surface Z and the direction in which the connecting section A22 extends are approximately parallel. One of the water receiving bodies A21 receives the water flow that has come along the upper flow straightening section C2 and transmits a clockwise rotational moment to the output shaft A1. Furthermore, the water receiving section A2b slides upward due to buoyancy, while the other water receiving body A21 receives the water flow and transmits a clockwise rotational moment to the output shaft A1.

[0172] Next, as shown in Figure 21(c), the water receiving section A2a does not generate a clockwise rotational moment at this point, and slides to the other side due to buoyancy. Furthermore, the water receiving section A2b slides to its maximum extent in one direction, while the other water receiving body A21 receives the water flow and transmits a clockwise rotational moment to the output shaft A1.

[0173] From this point onward, the only difference is the replacement of the water receiving body A21, resulting in the same operational pattern; therefore, the explanation will be omitted.

[0174] In this embodiment, the water flow is as follows due to the change in the configuration of the rectifier unit C.

[0175] In other words, the water flowing in from the inlet opening O of the upper flow straightening section C2 is guided to the rear side of the turbine body A by passing through the outlet opening E, which opens downwards and also comes into contact with the inner circumferential surface of the inlet opening O.

[0176] Next, the water flow comes into contact with the hanging portion n that hangs down substantially from the rear end of the outflow opening E, and is guided downwards.

[0177] Furthermore, the water flow guided by the hanging section n comes into contact with the rear lower flow straightening section, and is guided downwards towards the turbine body A.

[0178] On the other hand, the flow path of the forward lower straightening section C5 creates an upward-pushing water flow in front of the turbine body A.

[0179] In this way, the forward flow straightening section C1, the upper flow straightening section C2, the hanging section n, the rear lower flow straightening section C4, and the forward lower flow straightening section C5 form a vortex-like water flow inside the turbine body A, centered on the output shaft A1. Creating this kind of water flow makes the turbine body A's rotational operation even more efficient.

[0180] <<Effect>> Based on the above, the water flow energy conversion unit X of the above embodiment provides the following effects.

[0181] <<<Main Effects>>> We focus on a point located around and above the output shaft A1, where the water receiving body A21 receives a water flow that generates a positive rotational moment. In Embodiment 1, two water receiving bodies A21 are provided in one water receiving section A2, whereas in this embodiment, four water receiving bodies A21 are provided in one water receiving section A2. Therefore, the total volume of water received by the water flow that generates a positive rotational moment in this embodiment is doubled, and the rotational speed of the output shaft A1 is greatly accelerated and transmitted to the generator, enabling more efficient power generation.

[0182] By installing the water receiving auxiliary plate A21d on the water receiving body A21, the total volume of water received by the water flow that gives rise to the positive rotational moment on the water receiving body A21 increases further, and the rotational speed of the output shaft A1 also increases, which is then transmitted to the generator, enabling more efficient power generation.

[0183] The configuration of the rectifier unit C creates a vortex-like water flow inside the turbine body A, which increases the rotational speed of the output shaft A1 and transmits it to the generator, enabling efficient power generation.

[0184] In this embodiment, it is not necessarily required that multiple water receiving sections A2 supplement each other to rotate the output shaft A1; the rotation of the output shaft A1 can be continued with only one water receiving section A2.

[0185] <<<Other effects>>> With respect to parts that have the same structure as those in Embodiment 1, the same effects as in Embodiment 1 are assumed to be present.

[0186] <Embodiment 3> The water flow energy conversion unit X according to Embodiment 3 of the present invention will be described below with reference to Figures 22 to 24. In this embodiment, components that are essentially the same as those in the previous embodiment are denoted by the same reference numerals, and their descriptions are simplified.

[0187] <<Structure>> The configuration of the water flow energy conversion unit X will be explained below using Figures 22 and 23.

[0188] As shown in Figure 22, the water flow energy conversion unit X in this embodiment comprises a water turbine body A and a flow straightening unit C that controls the water flow, and all of these are installed in water such as the sea or a river. In other words, in this embodiment, compared to Embodiment 2, the configuration of the rectifier unit C remains the same, but the auxiliary unit B is omitted, and the configuration of the water receiving section A2 in the turbine body A and the method of connecting it to the output shaft A1 have been changed.

[0189] <<<Waterwheel body A>>> As shown in Figure 22, the turbine body A includes an output shaft A1, a plurality of water receiving sections A2 provided at predetermined intervals along the axial direction of the output shaft A1, and a support section A3 that pivotally supports the output shaft A1 so that it can rotate around its central axis P.

[0190] As shown in Figure 23, the water receiving section A2 has a substantially flat water receiving body A21 and a wire-like connecting section A22 that extends from the output shaft A1 and supports each water receiving body A21, and is plastically deformable into any shape.

[0191] More specifically, the water receiving body A21 is provided with a substantially cylindrical bracket j at one end of its side surface, and the tip of the connecting part A22 is loosely fitted and inserted into the bracket j, thereby connecting them to each other. Furthermore, the axial direction of bracket j is configured to be approximately parallel to the axial direction of output shaft A1, and the tip of the connecting part A22 is slightly curved, which prevents bracket j from detaching from the connecting part A22. Furthermore, a stopper member s is provided at the tip of the connecting portion A22 to limit the rotation angle of the water receiving body A21, and a fixing block r for connecting to the output shaft A1 is provided at the base end of the connecting portion A22.

[0192] The stopper member s is a small, plate-shaped piece configured to protrude above the water receiving body A21 in the left side view (Figure 23(a)). Furthermore, the stopper member s is provided on the connecting portion A22 and consists of a first piece s1 that is curved toward the output shaft A1 side and a substantially rectangular second piece s2 provided at the upper end of the first piece s1.

[0193] In addition, the water receiving body A21 is provided with a water receiving bracket d on one side end opposite to the side on which bracket j is located, to receive the water flow. Furthermore, as shown in Figures 23(a) and (c), one side of the water receiving bracket d forms an inclined surface that slopes away from the one side of the water receiving body A21 as it approaches the other end, and has a roughly triangular shape with an open bottom. In addition, having sides on both the left and right creates a container-like structure that receives the water flow through its opening. For the sake of explanation, in this embodiment, the configuration consisting of one water receiving body A21, one bracket j and one water receiving bracket d connected thereto, and in addition to these, one connecting part A22, one stopper member s and one fixing bracket r connected thereto, will be referred to as the blade unit D.

[0194] The blade unit D configured as described above is operable as shown in Figure 23(c). In other words, because the connecting portion A22 is loosely fitted into the bracket j, the water receiving body A21 can rotate around the axial direction of the bracket j until the water receiving bracket d makes surface contact with the second piece s2. Furthermore, it is preferable that the rotatable angle of the water receiving body A21 be approximately 120 degrees.

[0195] In this embodiment, Figure 22 shows an example in which six vane units D are provided around the output shaft A1 at equal angles within a single water receiving section A2.

[0196] The fact that all the connecting shafts A22 of the turbine body A are installed at equal angles around the central axis P helps to suppress rotational irregularities in the output shaft A1. This means that the water receiving section A2, which has multiple blade units D, is arranged with each unit offset by an equal angle around the central axis P. The method for calculating these equal angles is as follows. [Equal angles = 360 degrees / Total number of blade units D installed on the turbine body A]

[0197] In this embodiment, the total number of blade units D provided on the turbine body A can be determined as follows. Each water receiving section A2 is equipped with six blade units D spaced 60 degrees apart around the central axis P. On the other hand, the number of water receiving sections A2 provided on the turbine body A is 3. Therefore, the total number of blade units D provided on the turbine body A is 18. Therefore, the number of equal angles is 20 degrees (360 degrees / (6 × 3)).

[0198] In this embodiment, an example is shown where there are three water receiving sections A2, but the number is not limited to this; there may be two, four, five or more, etc. In this case, if calculated using the same calculation method as in this embodiment, the uniform angle intervals are as follows, assuming that the number of blade units D in one water receiving section A2 is 6, as in this embodiment: if there are 2 water receiving sections A2, the intervals are 30 degrees (360 degrees / (6 × 2)); if there are 4, the intervals are 15 degrees (360 degrees / (6 × 4)); and if there are 5, the intervals are 12 degrees (360 degrees / (6 × 5)). This makes it possible to rotate the output shaft A1 more evenly and stably. In this embodiment as well, similar to Embodiment 2, the rotation of the output shaft A1 can be continued using only one water receiving section A2.

[0199] <<Operational Mode>> The following describes the operation of the blade unit D in water where a water flow is present (rotational movement around the central axis P), as shown in Figures 12 to 14, using Figure 24. In Figure 24, only one blade unit D is schematically illustrated, and the operation of this blade unit D will be explained.

[0200] First, the vane unit D located at (1) receives the water flow that has risen along the forward rectifier section C1 via its water receiving bracket d, thereby transmitting a clockwise rotational moment to the output shaft A1.

[0201] Then the vane unit D rotates to position (2), and its water receiving bracket d receives the water flow that has flowed along the upper flow straightening section C2, thereby continuously transmitting a clockwise rotation moment to the output shaft A1.

[0202] Next, when the blade unit D rotates to position (3), the water pressure (buoyancy) from below causes the water receiving body A21 itself to rotate clockwise. As a result, water pressure from the water flow is applied to the back surface of the surface on which the water receiving bracket d is provided, and a clockwise rotational moment is transmitted to the connecting part A22.

[0203] Next, when the vane unit D rotates to position (4), the water receiving bracket d comes into contact with the second piece s2 of the stopper member s. This restricts the rotational movement of the water receiving body A21, and the water receiving bracket d presses against the surface of the second piece s2, transmitting a clockwise rotational moment to the output shaft A1.

[0204] Next, when the vane unit D rotates to position (5), the water receiving body A21 rotates counterclockwise due to the water pressure (buoyancy) from below, the water receiving bracket d separates from the second piece s2, and the water receiving body A21 rotates further counterclockwise at position (6).

[0205] As the rotation of the blade unit D continues, the water receiving bracket d receives the water pressure of the water flow rising along the forward rectifier C1 and begins to transmit a clockwise rotational moment to the output shaft A1. After that, the blade unit D returns to position (1), and the rotational movement of one revolution is completed.

[0206] <<Effect>> According to this embodiment, even with a low-speed water flow, the water pressure can be effectively captured, making it possible to easily rotate the output shaft A1. Furthermore, since the blade unit D is constructed using inexpensive sheet metal, wire, and other components, low-cost and efficient power generation is possible.

[0207] Furthermore, the benefit of installing the stopper member s is that by suppressing excessive clockwise rotation of the water receiving body A21, the movement of the water receiving body A21 in the water can be suppressed, and the generation of excess negative rotational moment can be prevented.

[0208] <Embodiment 4> The water flow energy conversion unit X according to Embodiment 4 of the present invention will be described below with reference to Figures 25 and 26. <<Structure>> In this embodiment, components that are essentially the same as those in the previous embodiment are denoted by the same reference numerals, and their descriptions are simplified.

[0209] In this embodiment, compared with Embodiment 2, the configurations of the auxiliary unit B and the rectifying unit C remain the same, while the configuration of the water receiving part A2 in the waterwheel main body A and the connection method with its output shaft A1 are changed.

[0210] FIG. 25 is an overall perspective view of the water flow energy conversion unit X according to this embodiment, which is a view in which the waterwheel main body A in the water flow energy conversion unit X shown in FIG. 17 is replaced with that according to this embodiment.

[0211] The water receiving part A2 shown in FIG. 26(a) is based on the configuration of Embodiment 1 shown in FIG. 2(a). However, the water receiving auxiliary plate A21d used in Embodiment 2 is provided on the water receiving body A21, and a pair of blade units D used in Embodiment 3 are configured to be attached. Specifically, the water receiving part A2 in this embodiment uses a bracket as a substantially rectangular parallelepiped cylindrical bracket h, and fixed blocks r, which are part of the blade unit D, are fixed to the upper and lower surfaces of this bracket h, so that a pair of blade units D are connected to the bracket h.

[0212] Also, as shown in FIG. 26(b), instead of the bracket h, an inversion means W can be provided on the output shaft A1. In this case, by embedding the fixed block r in the bracket i (see FIG. 5(b)) fixed to the inner peripheral surface, the water receiving part A2 including the blade unit D also rotates along with the rotation of the hollow motor interposed in the inversion means W.

[0213] In that case, it is necessary to install a rear rectifying part C3 obtained by reversing the front rectifying part C1 of this embodiment back and forth behind the waterwheel main body A. In addition, in order to avoid interference with this, the rear lower rectifying part C4 and the vertical part n are not installed, and the upper rectifying part C2 of Embodiment 1 is adopted. Also, an auxiliary unit B used in this embodiment is additionally installed in front of the waterwheel main body A in a state of being reversed back and forth.

[0214] Note that suppressing the rotational unevenness of the output shaft A1 means that the bracket h is connected to the output shaft A1 such that the water receiving parts A2 are arranged at equal angular displacements around the central axis P. The method for calculating the equal angle does not need to consider the number of water receiving bodies A21 of the blade unit D, and is the same as the calculation method in Embodiment 1 with a similar basic structure. Therefore, in this embodiment, the equal angle is 60 degrees, the same as in Embodiment 1 when the number of water receiving parts A2 is three.

[0215] Note that the number of water receiving parts A2 is not limited to three, and may be two, four, five or more. The calculation method for the interval of the equal angles is also the same as in Embodiment 1 and results in the same angle. Also, in this embodiment, as in Embodiments 2 and 3, it is possible to continue the rotation of the output shaft A1 with only one water receiving part A2. <<Effect>> The area where the intermediate flow velocity is flowing, which is suitable for Embodiment 2 and Embodiment 3, is preferable as the adaptation area of this embodiment. Also, according to this embodiment, it is possible to expand the adaptable area to a wider range.

[0216] <Embodiment 5> [[ID=I8]]Hereinafter, the water flow energy conversion unit X according to Embodiment 5 of the present invention will be described with reference to FIG. 27. Note that in this embodiment, for components that are basically the same as those in the previous embodiments, the same reference numerals are given and the description thereof is simplified.

[0217] In this embodiment, compared with Embodiment 2, the configuration of the water receiving part A2 in the water wheel main body A and the connection method thereof with the output shaft A are changed. Note that the auxiliary unit B and the rectifying unit C will be described later.

[0218] <<Usage mode>> In this embodiment, the water receiving part A2 can be used in the manner shown in FIG. 27. In Figure 27, the water receiving section A2 in Embodiment 2 is referred to as water receiving section A2, the water receiving section A2 in Embodiment 4 is referred to as water receiving section A2', and the water receiving section A2 in Embodiment 3 is referred to as water receiving section A2''. Furthermore, in Figure 27, six arrangement spaces are formed, separated by partition plates t2. Furthermore, although the diagram of the rectifier unit C is omitted except for the partition plate t2, it is assumed that the configuration of the rectifier unit C used in each embodiment 2 to 4 is adopted. Furthermore, the connection method used in Embodiment 2 is employed between the water receiving section A2 and the output shaft A1, the connection method used in Embodiment 4 is employed between the water receiving section A2' and the output shaft A1, and the connection method used in Embodiment 3 is employed between the water receiving section A2'' and the output shaft A1.

[0219] The two central spaces are where the water receiving section A2 in Embodiment 2 is located. In this case, it is preferable to position each of the two water receiving sections A2 in those spaces at a 45-degree angle around the central axis P. The method for calculating this angle is the same as in the case of two water receiving sections A2 in Embodiment 2. Furthermore, although the first magnetic section B1 and the magnetic section support B3 are not shown in the illustration, the second magnetic section B2 provided in each water receiving section A2 is shown in the illustration in correspondence.

[0220] Furthermore, the water receiving sections A2' in Embodiment 4 are positioned in the left and right spaces of the two central spaces. In this case, it is preferable to position the two water receiving sections A2' in those two spaces at a 90-degree angle to each other around the central axis P. The method for calculating this angle is the same as in Embodiments 1 and 4 when there are two water receiving sections A2. Furthermore, although the first magnetic part B1 and the magnetic part support B3 are not shown in the illustration, the second magnetic part B2 provided in each water receiving part A2' is shown in the illustration in correspondence.

[0221] Furthermore, in the two spaces at both ends, the water receiving part A2´´ in Embodiment 3 is arranged. Six blade units D are provided at equal angles on each water receiving part A2´´. In this case, it is preferable that each water receiving part A2´´ in the two spaces is arranged with a 30-degree interval around the central axis P. The concept of calculating this angle is the same as that in the case where there are two water receiving parts A2 in Embodiment 3. Also, since the auxiliary unit B is unnecessary, it is not shown in the figure.

[0222] <<Effect>> According to this embodiment, by selecting the connection method between each water receiving part A2 and the output shaft A1 from Embodiments 2 to 4, even in a situation where the flow velocity in water is different between the left and right sides of the output shaft A1, the rotation operation of the output shaft A1 can be efficiently performed, contributing to an improvement in power generation efficiency.

[0223] Note that the various shapes, dimensions, etc. of each component shown in the above Embodiments 2 to 5 are also examples, and can be variously changed based on design requirements and the like.

Explanation of Reference Numerals

[0224] X Water flow energy conversion unit A Water wheel main body A1 Output shaft A2 Water receiving part A3 Support part S Sliding means W Reversing means B Auxiliary unit B1 First magnetic part B2 Second magnetic part B3 Magnetic part support C Rectifying unit C1 Front rectifying part C2 Upper rectifying part C3 Rear rectifying part C4 Rear lower rectifying part C5 Front lower rectifying part D Blade unit Z Installation surface

Claims

1. A water flow energy conversion unit that converts the energy of a water flow into rotational motion, It comprises a water turbine body installed in water and a flow straightening unit that controls the water flow, The turbine body comprises an output shaft extending substantially horizontally, a water receiving section provided on the output shaft, and a support section that pivotally supports the output shaft so as to be rotatable around its central axis. The output shaft is connected to a generator that is driven to rotate by its rotational movement. The water receiving section comprises a water receiving body that receives the water flow and a connecting section that connects the water receiving body to the output shaft. The water receiving body is configured as a whole to be a substantially flat plate that receives the water flow on its sides. The connecting portion rotatably supports the water receiving body, The axial direction of the rotating shaft of the water receiving body is configured to be substantially parallel to the axial direction of the output shaft. In the water receiving body, a water receiving bracket is provided on one side facing the side adjacent to the pivot shaft, which is configured as a container to receive the water flow through its opening, thereby receiving the water flow. The rectifier unit has a forward rectifier section positioned in front of the turbine body when viewed in the axial direction of the output shaft, The forward flow straightening section includes an inclined surface whose upper surface gradually slopes upward toward the turbine body as it approaches the turbine body. Water flow energy conversion unit.

2. The water receiving section has a stopper member, The stopper member limits the rotation angle of the water receiving body to a predetermined range. The water flow energy conversion unit according to claim 1.

3. The water receiving section has a plurality of the connecting sections, Each of the aforementioned connecting parts is provided at intervals around the output shaft. A water flow energy conversion unit according to claim 1 or 2.

4. The connecting portion is a wire-like body that can be plastically deformed into any shape. The water flow energy conversion unit according to claim 1.

5. The rectifying unit has an upper rectifying section that covers the upper part of the water turbine body. The water flow energy conversion unit according to claim 1.

6. The upper flow straightening section is provided with an inlet opening on the front flow straightening section side through which the water flow enters, and an outlet opening that opens downward on the upper side of the turbine body, at a predetermined distance behind the inlet opening, so that the inside is configured as a flow path. The water flow energy conversion unit according to claim 5.

7. The upper inner surface of the flow path is substantially curved downward as it moves from the inlet opening to the outlet opening. The water flow energy conversion unit according to claim 6.

8. The upper flow straightening section is provided with a hanging portion that hangs substantially downward from the rear end of the outflow opening and is positioned adjacent to the rear side of the turbine body. A water flow energy conversion unit according to claim 6 or 7.

9. The rectifying unit has a rear lower rectifying section located behind the turbine body when viewed from the axial direction, In the aforementioned rear lower flow straightening section, the inner circumferential surface facing the turbine body is substantially curved toward the rear. The water flow energy conversion unit according to claim 1.

10. The rectifying unit has a front lower rectifying section located in front of the turbine body and below the front rectifying section when viewed from the axial direction, The aforementioned forward lower flow straightening section includes an inclined surface whose upper surface gradually slopes upward toward the water receiving section as it approaches the turbine body, and a vertical surface connected to the rear end of this inclined surface and extending upward, The inclined surface and the vertical surface, together with the lower surface of the forward flow straightening section, constitute a flow path. The water flow energy conversion unit according to claim 1.

11. Multiple rectifier plates are formed on the inclined surface of the forward rectifier section, arranged along the axial direction of the output shaft and adjacent to the water receiving section. The water flow energy conversion unit according to claim 1.

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