Wind propulsion device

Abstract

To improve rigidity. [Solution] The wind-powered propulsion device of the embodiment is a wind-powered propulsion device installed on a moving body that generates a propulsive force by receiving wind, and comprises a rotating body having a frame portion formed in an annular shape around a rotation axis and rotatable around the rotation axis, and a plurality of blades provided such that imaginary straight lines connecting each of their ends in a direction perpendicular to the rotation axis are parallel, and the rotating body comprises a support structure including a plurality of support columns connected to the frame portion and supporting each of the plurality of blades.

Description

Technical Field

[0007] , , ,

[0001] The present invention relates to a wind propulsion device.

Background Art

[0002] In Patent Document 1, a sailboat is known in which vertical blades rotating around a vertical axis are provided in a windmill shape and can be propelled based on wind power.

Prior Art Document

Patent Document

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the above sailboat, in order to reduce the play of the rotating shaft, a pillar may be provided at the center. If a plurality of blades are supported only by the pillar at the center for weight reduction, the rigidity will decrease.

[0005] The present invention has been made to solve the above problems, and an object thereof is to provide a wind propulsion device capable of improving rigidity.

Means for Solving the Problems

[0006] As means for solving the above problems, an aspect of the present invention has the following configuration. (1) The wind propulsion device according to an aspect of the present invention is a wind propulsion device installed on a moving body and generating a propulsive force by receiving wind, and has a frame portion formed in an annular shape centered on a rotation axis, a rotating body rotatable about the rotation axis, and a plurality of blades provided such that virtual straight lines connecting both ends in a direction orthogonal to the rotation axis are parallel to each other. The rotating body includes a support structure including a plurality of support columns connected to the frame portion and supporting the plurality of blades respectively.

[0007] In this configuration, multiple wings are supported by multiple support columns in the support structure, resulting in improved rigidity compared to a configuration where the wings are supported only by a central column.

[0008] (2) In the wind propulsion device described in (1) above, the support structure may further include a central column provided at the center of the frame when viewed from the axial direction along the rotation axis, and a plurality of spokes extending radially from the central column and connected to the frame.

[0009] (3) In the wind propulsion device described in (1) above, the support structure may further include a central column provided at the center of the frame when viewed from the axial direction along the rotation axis, and a plurality of wing-internal beams extending radially outward from the central column, with their respective outer ends connected to the plurality of support columns and provided inside each of the plurality of wings.

[0010] (4) In the wind propulsion device described in (1) above, an internal space is formed inside the support structure that communicates in the axial direction along the rotation axis, the plurality of support columns are arranged at equal intervals in the circumferential direction of the frame, the plurality of support columns and the frame are provided to be located within a virtual cylinder centered on the rotation axis, and the plurality of blades extend across the internal space, with both ends of each blade supported by the plurality of support columns.

[0011] (5) In the wind propulsion device described in (1) above, an internal space is formed inside the support structure that communicates in the axial direction along the rotation axis, the plurality of support columns are arranged at equal intervals in the radial direction of the frame, the plurality of support columns and the frame are provided to be located within a virtual cylinder centered on the rotation axis, and the plurality of blades may extend across the internal space and each end may be supported by the plurality of support columns.

[0012] (6) An embodiment of the present invention is a wind propulsion device installed on a moving body that generates a propulsive force by receiving wind, comprising: a rotating body having a frame portion formed in an annular shape around a rotation axis and rotatable around the rotation axis; and a plurality of blades provided such that a virtual straight line connecting each of their ends in a direction perpendicular to the rotation axis is parallel, wherein the axial ends of two of the plurality of blades provided symmetrically with respect to a line including the rotation axis are provided such that they form a trapezoid when viewed from a direction parallel to the virtual straight line.

[0013] This configuration improves rigidity compared to the case where the axial ends of two wings, arranged symmetrically, form a parallelogram when viewed from a direction parallel to a virtual straight line.

[0014] (7) In the wind propulsion device described in (6) above, the rotating body further has a plurality of support columns connected to the frame and supporting each of the plurality of blades, and when viewed from a direction parallel to the imaginary straight line, the two outermost of the plurality of support columns with respect to the axis of rotation may be provided along trapezoidal legs.

[0015] (8) The wind propulsion device described in any of (1) to (7) above comprises an assembly consisting of the rotating body and the plurality of blades, and the assembly may comprise a plurality of smaller assemblies arranged in the circumferential or radial direction of the frame and detachably connected to one another.

[0016] (9) In the wind propulsion device described in (8) above, the small assembly includes an upper frame member and a lower frame member, each formed in a semicircular shape when viewed from the axial direction along the rotation axis, and the plurality of blades may have their upper vertices connected to the upper frame member and their lower vertices connected to the lower frame member.

[0017] (10) In the wind propulsion device described in (8) or (9) above, the plurality of small assemblies each consist of two small assemblies formed in a semicircular shape when viewed from the axial direction along the rotation axis, and a plurality of assemblies are provided along the axial direction, and the plurality of assemblies may be stacked such that each pair of small assemblies is offset in the circumferential direction and overlaps when viewed from the axial direction.

[0018] (11) In the wind propulsion device described in any of (8) to (10) above, the plurality of small assemblies may comprise an arc-shaped portion that constitutes the frame and is formed in an arc shape when viewed from the axial direction of the rotation axis, and a plurality of support columns that are detachably connected to the arc-shaped portion.

[0019] (12) The wind propulsion device described in any of (1) to (11) above comprises an assembly consisting of the rotating body and the plurality of blades, wherein a plurality of assemblies are provided along the axial direction of the rotating shaft, and if the number of the plurality of assemblies is N and M is a natural number, the plurality of assemblies may be arranged offset from each other by 180 × M / N degrees.

[0020] (13) In the wind propulsion device described in (12) above, the axial ends of two of the plurality of blades, which are arranged symmetrically with respect to the line including the rotation axis, are arranged to form a trapezoid when viewed from a direction parallel to the virtual line, and when viewed from a direction parallel to the virtual line, the plurality of assemblies may be arranged such that one axial end of each of the plurality of blades is connected to the other axial end of a blade that is shifted one inward or outward with respect to the rotation axis.

[0021] (14) In the wind propulsion device described in any of (1) to (13) above, the axial ends of two of the plurality of blades that are arranged symmetrically with respect to the line containing the rotation axis are arranged to form a trapezoid when viewed from a direction parallel to the virtual line, and when viewed from a direction parallel to the virtual line, two adjacent assemblies of the plurality of blades in the axial direction may be stacked such that the respective plurality of blades are aligned along the legs of opposite trapezoids. [Effects of the Invention]

[0022] According to the present invention, the rigidity can be improved.

Brief Description of the Drawings

[0023] [Figure 1] It is a perspective view of the wind propulsion system of the first embodiment. [Figure 2] It is a diagram showing an example of the functional configuration of the wind propulsion system of the first embodiment. [Figure 3] It is a diagram showing an example of the flow of energy etc. in the wind propulsion system together with a comparative example. [Figure 4] It is a perspective view of the windmill sail body in the wind propulsion device of the first embodiment. [Figure 5] It is a perspective view of the wind propulsion device (wire type) of the second embodiment. [Figure 6] It is a perspective view of the wind propulsion device (spoke type) of the third embodiment. [Figure 7] It is a perspective view of the wind propulsion device (wing inner support type) of the fourth embodiment. [Figure 8] It is a perspective view of the wind propulsion device (fully cylindrical type) of the fifth embodiment. [Figure 9] It is a perspective view of the wind propulsion device (trapezoidal wing) of the sixth embodiment. [Figure 10] It is a schematic diagram of the trapezoidal support column of the wind propulsion device of the sixth embodiment. [Figure 11] It is a perspective view showing the split model of the wind propulsion device of the seventh embodiment. [Figure 12] It is a perspective view showing the sub-assembly of the wind propulsion device of the seventh embodiment. [Figure 13] It is a perspective view showing the wind propulsion device (semicircle stacked type) of the eighth embodiment. [Figure 14] It is a perspective view showing the assembled body of the wind propulsion device of the ninth embodiment. [Figure 15] It is a perspective view showing the sub-assembly (support column type) of the wind propulsion device of the ninth embodiment. [Figure 16]This is a schematic diagram of the wind propulsion device of the 10th embodiment (Example 1 of vertical continuity). [Figure 17] This is a side view of multiple assemblies of the wind power propulsion device according to the 10th embodiment. [Figure 18] This is a cross-sectional view of multiple blades of a wind propulsion device according to the tenth embodiment. [Figure 19] This is a schematic diagram of the wind propulsion device of the 11th embodiment (example 2 of vertical continuity). [Figure 20] This is a side view of multiple assemblies of the wind power propulsion device according to the 11th embodiment. [Figure 21] This is a side view of the wind power propulsion device (combination type of support structure and central wing) according to the 12th embodiment. [Figure 22] This is a perspective view of the wind power propulsion device assembly according to the twelfth embodiment. [Figure 23] This figure shows a wind power propulsion device (multi-tiered stacking type) according to the 13th embodiment. [Figure 24] This is a schematic diagram of the first modified wind propulsion device. [Figure 25] This is a schematic diagram of the second modified wind power propulsion device. [Figure 26] This is a schematic diagram of the third modified wind power propulsion device (a model using steel). [Figure 27] This is a schematic diagram of the fourth modified wind propulsion device (another example of a fully cylindrical type). [Modes for carrying out the invention]

[0024] Hereinafter, embodiments of the wind propulsion device and wind propulsion system of the present invention will be described with reference to the drawings. In the following description, expressions indicating relative or absolute arrangements such as "parallel," "orthogonal," "center," and "coaxial" will not only mean such arrangements strictly, but will also include states in which the components are relatively displaced with tolerances or angles and distances that allow the same function to be obtained. In the drawings used in the following description, the scale of each component has been appropriately changed in order to make each component recognizable.

[0025] <Wind power propulsion system> Figure 1 is a perspective view of the wind power propulsion system 100 according to the first embodiment. Figure 2 is a diagram showing an example of the functional configuration of the wind power propulsion system 100 according to the first embodiment. Referring together to Figures 1 and 2, the wind power propulsion system 100 is installed on a ship 2 (an example of a mobile body) and comprises a wind power propulsion device 1 that generates thrust by receiving wind, and a wind turbine sail control device 140 (an example of a wind power control device) that controls the wind power propulsion device 1.

[0026] The wind power propulsion system 1 includes a wind turbine sail body 111 that is rotatable around a rotation axis RC (see Figure 4) that extends vertically from the hull 3. The wind power propulsion system 1 further includes an electric motor 41 that rotates the wind turbine sail body 111. The wind turbine sail body 111 includes an assembly 4 that includes a plurality of blades 10A to 10I that are integrally connected and rotatable around the rotation axis.

[0027] The wind propulsion device 1 has a frame 21 formed in an annular shape around a rotation axis RC, and comprises a rotating body 20 that can rotate around the rotation axis RC, and a plurality of blades 10A to 10I arranged so that imaginary straight lines connecting their respective ends in a direction perpendicular to the rotation axis RC are parallel (see Figure 4). The rotating body 20 is connected to the frame 21 and includes a support structure 25 which includes a plurality of support columns 26 to 28 that support the plurality of blades 10A to 10I. The rotating body 20 having the frame 21 and the plurality of blades 10A to 10I constitute an assembly 4.

[0028] The wind power control device 140 includes a speedometer 65 that acquires the moving speed of the ship 2, a detection unit 7 that acquires wind condition information including the current wind speed and wind direction in the area where the ship 2 is located, a calculation unit 126 that calculates the relative wind direction applied to the wind power propulsion device 1 based on the acquired moving speed of the ship 2 and wind condition information, and a rotation control unit 40 that controls the electric motor 41 according to the calculated relative wind direction to adjust the rotation speed of the wind turbine sail body 111. The wind power propulsion device 1 that constitutes the wind power propulsion system 100 functions as a wind turbine sail that propels the ship 2 by receiving wind and generating lift.

[0029] The wind power propulsion system 100 includes a wind power propulsion device 1 comprising the wind turbine sail body 111, detection unit 7, receiving unit 8, and rotation control unit 40 described above; a remote control device 120 comprising an operating unit 121 operated to control the propulsion speed of the ship 2, and a determination unit 134 that determines the target thrust of the wind power propulsion device 1 and the target thrust of the propeller 51 driven by the prime mover 50 attached to the ship 2 according to the operating position of the operating unit 121; a wind turbine sail control device 140 that controls the rotation speed of the wind turbine sail body 111 around the rotation axis according to the target thrust of the wind power propulsion device 1; and a prime mover control device 150 that controls the rotation speed of the prime mover 50 according to the target thrust of the propeller 51. The wind power propulsion system 100 constitutes a system (ship integrated propulsion system) that integrates and controls two types of propulsion: propulsion by the wind power propulsion device 1 and propulsion by the propeller 51 driven by the prime mover 50.

[0030] The vessel 2 is equipped with a remote control device 120, a prime mover 50, a shaft 52, a propeller 51, a shaft horsepower meter 55, a detection system 60, a speedometer 65, and a prime mover control device 150. The vessel 2 does not necessarily have to be operated by a crew. For example, the vessel 2 may be an autonomously operated vessel.

[0031] The remote control device 120 executes a program (hereinafter referred to as the "ship control program") that controls the operation of the ship 2. The remote control device 120 functions as a device comprising a general control unit 130, an operation unit 121, a communication unit 122, an output unit 123, a calculation unit 126, and a storage unit 124 by executing the ship control program. The remote control device 120 includes a general control unit 130 that controls the operation of each functional unit of the remote control device 120.

[0032] The central control unit 130 includes a processor 131, such as a CPU (Central Processing Unit), connected by a bus, and a memory 132. The processor 131 reads the ship control program stored in the storage unit 124 and stores the read ship control program in the memory 132. The processor 131 executes the ship control program stored in the memory 132.

[0033] The control unit 130 communicates with the prime mover control unit 150, for example, by controlling the operation of the communication unit 122. The control unit 130 acquires information input via, for example, the operation unit 121. The control unit 130 records information generated by, for example, the execution of the ship control program in the storage unit 124. The control unit 130 acquires the rotational speed of the prime mover 50, for example. The control unit 130 outputs the acquired rotational speed to the prime mover control unit 150, for example. In the following description, the actual rotational speed value of the prime mover 50 acquired (determined) by the control unit 130 is also referred to as the "actual rotational speed".

[0034] The control unit 121 is a handle for controlling the speed and direction of the vessel 2. The control unit 121 accepts input from the crew. By operating the control unit 121, the crew inputs either the target engine speed or the engine direction of rotation, or both, to the remote control device 120. The target engine speed is the target rotational speed of the prime mover 50. The engine direction of rotation is the direction of rotation of the prime mover 50. The direction of rotation of the prime mover 50 is either forward or reverse. The direction of travel of the vessel 2 when the direction of rotation of the prime mover 50 is forward is opposite to the direction of travel of the vessel 2 when the direction of rotation of the prime mover 50 is reverse.

[0035] The control unit 121 outputs the target rotational speed indicated by the crew's operation to the control unit 130. The control unit 121 also outputs information indicating the engine rotation direction indicated by the crew's operation (hereinafter referred to as "rotation direction information") to the control unit 130. Note that the control unit 121 does not necessarily have to be operated by a crew member. For example, if the ship 2 is operating autonomously, the control unit 121 may be operated by the control unit 130 in accordance with the ship control program.

[0036] The communication unit 122 includes a communication interface for connecting the remote control device 120 to the shaft horsepower meter 55, the detection system 60, the speedometer 65, and the prime mover control device 150. The communication unit 122 communicates with the shaft horsepower meter 55, the detection system 60, the speedometer 65, and the prime mover control device 150, for example, via either wired or wireless communication. The communication unit 122 transmits information such as target rotational speed, actual rotational speed, and rotational direction to the prime mover control device 150.

[0037] The output unit 123 includes a display device such as a CRT (Cathode Ray Tube) display, a liquid crystal display, or an organic EL (Electro-Luminescence) display, as well as an output device such as a speaker or other audio output device. The output unit 123 may also be configured as an interface for connecting these output devices to the device. The output unit 123 outputs information related to the remote control device 120. For example, the output unit 123 outputs the operation results of the operation unit 121.

[0038] The calculation unit 126 is configured to include a processor such as a CPU (Central Processing Unit) connected by a bus (an example of a processing unit). The calculation unit 126 calculates various information related to the remote control device 120. For example, the calculation unit 126 calculates the relative wind direction on the wind propulsion device 1 based on the acquired moving speed of the ship 2 and wind condition information.

[0039] The memory unit 124 is configured using a storage device such as a magnetic hard disk drive or a semiconductor storage device. The memory unit 124 stores various information related to the remote control device 120. The memory unit 124 pre-stores, for example, a ship control program. The memory unit 124 stores, for example, information generated by the execution of the ship control program. The memory unit 124 stores, for example, a history of operations performed by the crew on the control unit 121. The memory unit 124 stores, for example, a history of the actual rotational speed of the prime mover 50.

[0040] The prime mover 50 is the engine that generates the propulsion force for the ship 2. The prime mover 50 converts the energy contained in the fuel into power. The type of fuel and the mechanism of operation of the prime mover 50 can be anything as long as it can convert the energy contained in the fuel into power. The prime mover 50 is, for example, a two-stroke diesel engine. The prime mover 50 may also be, for example, a four-stroke diesel engine or a gas engine. For the sake of simplicity, the ship 2 will be described below using the example of the prime mover 50 being a two-stroke engine.

[0041] The shaft 52 rotates due to the power generated by the prime mover 50. The rotational speed of the shaft 52 is proportional to the rotational speed of the prime mover 50. By rotating, the shaft 52 transmits the power generated by the prime mover 50 to the propeller 51.

[0042] The propeller 51 rotates due to the power generated by the prime mover 50. The rotation of the propeller 51 generates thrust that moves the ship 2.

[0043] The shaft horsepower meter 55 measures the power generated by the prime mover 50. The shaft horsepower meter 55 measures the power generated by the prime mover 50 by detecting the torsional strain occurring in the shaft 52 using either an electrical method, an optical method, or both.

[0044] The detection system 60 includes a sensor for detecting the rotational speed of the prime mover 50. The detection device may include, for example, a proximity sensor. The proximity sensor may be configured to output an ON signal when metal is located within a certain distance and an OFF signal when metal is not located within a certain distance. In this case, the proximity sensor outputs an ON signal when a convex portion of the irregularities on the surface of the shaft 52 is located within the detection range, and an OFF signal when a concave portion is located within the detection range. The detection system 60 may detect the rotational speed of the prime mover 50 based on such changes in the output of the proximity sensor and information obtained in advance indicating the spacing of the irregularities on the shaft 52.

[0045] The detection system 60 is not limited to proximity sensors; it may also include other types of devices. For example, the detection system 60 may include an encoder, a sensor for detecting engine noise, or a sensor for detecting engine vibration.

[0046] The speedometer 65 measures the speed of the vessel 2. The speedometer 65 measures the speed using, for example, the Doppler effect. Specifically, the speed measured by the speedometer 65 is the speed relative to the water.

[0047] The engine control device 150 controls the operation of the engine 50. The engine control device 150 determines the fuel injection amount and fuel injection timing based on the actual rotational speed acquired by the determination unit 134. The engine control device 150 controls the operation of the engine 50 so that the fuel injection amount is injected at the determined timing. The engine control device 150 controls the operation of the engine 50 by executing a fuel input amount calculation process, a fuel input control process, and a rotation direction control process.

[0048] The fuel input amount calculation process is a process that calculates the amount of fuel to be input to the prime mover 50 (hereinafter also referred to as "fuel input amount") using a predetermined input amount calculation function based on the target rotational speed and the actual rotational speed. The input amount calculation function is a function that uses the target rotational speed and the actual rotational speed as explanatory variables and the fuel input amount as the dependent variable. The prime mover control device 150 calculates the fuel input amount by executing the fuel input amount calculation process.

[0049] The fuel injection control process controls the degree to which a valve attached to the fuel injection pipe is opened and closed so that the amount of fuel calculated by the fuel injection amount calculation process is injected into the prime mover 50. The fuel injection pipe is a pipe that connects the prime mover 50 to a fuel tank (not shown), and is the pipe through which fuel flows from the fuel tank to the prime mover 50. The prime mover control device 150 injects the amount of fuel from the fuel tank into the prime mover 50 by executing the fuel injection control process.

[0050] The rotation direction control process is a process that controls the rotation direction of the prime mover 50 to the engine rotation direction. The rotation direction control process is a process that switches the rotation direction of the prime mover 50 between forward and reverse rotation by, for example, operating the clutch of the prime mover 50. The prime mover control device 150 controls the rotation direction of the prime mover 50 to the engine rotation direction by executing the rotation direction control process.

[0051] The direction of the torque output by the prime mover 50 corresponds to the direction of rotation of the prime mover 50. Therefore, the direction of the torque when the prime mover 50 is rotating in the forward direction is opposite to the direction of the torque when the prime mover 50 is rotating in the reverse direction. In addition, the power generated by the prime mover 50 is the value obtained by multiplying the magnitude of the torque output by the prime mover 50 by the rotational speed of the prime mover 50.

[0052] The central control unit 130 further comprises an acquisition unit 133 and a determination unit 134. The acquisition unit 133 acquires the detection results from the detection system 60 via the communication unit 122. The determination unit 134 acquires the power measured by the shaft horsepower meter 55 via the communication unit 122. The acquisition unit 133 acquires the ship speed measured by the speedometer 65 via the communication unit 122. The acquisition unit 133 acquires the amount of fuel input calculated by the prime mover control device 150 via the communication unit 122. The acquisition unit 133 acquires the target rotational speed and rotational direction information output by the operation unit 121 via the communication unit 122.

[0053] The determination unit 134 performs rotational speed determination processing. The rotational speed determination processing is a process that determines one of the rotational speeds obtained from the detection system 60 as the actual rotational speed of the prime mover 50, based on at least one of the target rotational speed, state information which is information about the state of the prime mover 50, and the ship speed of the ship 2. Candidates for the actual rotational speed are, for example, the first rotational speed and the second rotational speed. The state information includes, for example, the amount of fuel being added. The state information also includes, for example, the power measured by the shaft horsepower meter 55.

[0054] The control unit 130 outputs the actual rotational speed determined by the determination unit 134 to the prime mover control device 150 via the communication unit 122. The control unit 130 outputs rotational direction information to the prime mover control device 150 via the communication unit 122. The control unit 130 outputs the target rotational speed to the prime mover control device 150 via the communication unit 122. The control unit 130 controls the operation of the output unit 123 to output information to the output unit 123.

[0055] <Flow of energy, etc., in wind power propulsion systems> Figure 3 shows an example of energy flow in the wind power propulsion system 100, along with a comparative example. In Figure 3, the flow of physical materials, the flow of information, and the flow of electricity (an example of energy flow) are indicated by various arrows.

[0056] As shown in Figure 3, in the comparative example (existing system), the wind force is first converted into rotational force to rotate the propeller. Therefore, in the comparative example, the propulsion efficiency is reduced due to the added force conversion. In contrast, the wind-powered propulsion system 100 of this embodiment treats the wind turbine sail as a propeller and uses the lift (Magnus force) generated by the wind-powered sail as the direct propulsion force. In other words, the wind-powered propulsion system 100 of this embodiment uses wind directly as the propulsion force. Therefore, the propulsion efficiency of the wind-powered propulsion system 100 of this embodiment is improved compared to the comparative example.

[0057] In this embodiment of the wind-powered propulsion system 100, wind is received by the wind turbine sail and converted into propulsion. For example, just as a sailing ship receives wind with its sails and converts it into propulsion, a wind turbine sailing ship also directly converts wind into propulsion with the wind turbine sail. The wind-powered propulsion system 100 of this embodiment is characterized by converting wind into propulsion as a sailing ship. Furthermore, in the wind-powered propulsion system 100 of this embodiment, the performance of the wind turbine sail as a sail is superior to that of a general rigid-wing sail.

[0058] <Electric motor> Referring to Figures 2 to 4, the rotation control unit 40 includes an electric motor 41 capable of rotating the wind turbine sail body 111. The electric motor 41 enables both the driving of the rotation of the wind turbine sail body 111 around the rotation axis, and the acceleration and deceleration of the rotation of the wind turbine sail body 111. In other words, the electric motor 41 enables both the driving of the rotation of the blades 10A to 10H around the rotation axis, and the acceleration and deceleration of the rotation of the blades 10A to 10H around the rotation axis.

[0059] <Brake part> The wind propulsion system 100 is further equipped with a braking unit 45 that brakes the rotation of the blades 10A to 10H around the rotation axis when the detection unit 7 detects a wind speed exceeding a threshold. The braking unit 45 reduces the rotation speed of the blades 10A to 10H around the rotation axis during strong winds, thereby reducing lift. Furthermore, by reducing lift during headwinds, induced drag can also be reduced.

[0060] <Energy Storage Section> The wind power propulsion system 100 further includes an energy storage unit 46 that stores the regenerative energy of the electric motor 41 generated when the rotation of the rotating shaft is decelerated. This allows the regenerative energy of the electric motor 41 stored in the energy storage unit 46 to be utilized. For example, the energy storage unit 46 may be configured to include a battery, a capacitor, or the like.

[0061] As mentioned above, while a windmill sail functions as a sail that converts wind power into propulsion, it also functions as a generator that can convert excess energy into electricity when the wind force exceeds the propulsion command. For example, the extracted electricity can be used for propulsion or for general purposes such as lighting.

[0062] <Acquisition part> The wind propulsion system 100 further includes an acquisition unit 133 that acquires the wind speed and direction of the currently occurring wind. The rotation control unit 40 increases the rotation speed of the blades 10A to 10H, which are rotated solely by the acquired wind, using the electric motor 41 if the rotation speed of the blades 10A to 10H, which are rotated only by the currently occurring wind, is below a threshold. For example, if the thrust that can be produced by a wind turbine sail rotating without energy supply using the wind speed and direction of the currently occurring wind is insufficient in response to a thrust command, the thrust can be amplified by increasing the speed with the power of the electric motor 41.

[0063] For example, the rotational speed thresholds for wings 10A to 10H (an example of a rotational speed threshold for wings) are calculated based on the thrust command. For example, the optimal rotational speed may be calculated from the thrust command, and based on the calculation result, the rotational speed of wings 10A to 10H may be increased by the electric motor 41.

[0064] <Relationship between wind turbine sail control and prime mover control> The thrust that a windmill sailing ship can generate without energy is limited. Therefore, the thrust that cannot be generated without energy can be supplemented by the drive mode of the windmill sail (rotation drive of blades 10A to 10H). For example, any thrust insufficient in the windmill sail drive mode can be supplemented by propeller 51 (propeller drive).

[0065] For example, the control unit 130 calculates the optimal rotational speed of the blades 10A to 10H around the rotation axis based on the received thrust command and the wind direction and wind speed detection results detected at the time of receiving the thrust command. For example, when controlling the rotational speed of the blades 10A to 10H, the q-axis current may be controlled by vector control, allowing for seamless control without distinction between driving and braking. For example, the control unit 130 may link the blades 10A to 10H with the propeller 51 and adjust the thrust ratio between the wind turbine sail and the propeller 51 to maximize energy efficiency.

[0066] As described above, the wind propulsion system 100 is a system that converts wind power into thrust. For example, when it receives a thrust command value from the remote control device 120, it calculates the optimal rotation speed of the blades 10A to 10H based on the wind direction and wind speed to produce that thrust. Then, it controls the electric motor 41 to achieve the calculated rotation speed. In this case, the rotation speed includes the direction of rotation. In the case of reverse rotation, it is controlled with a negative speed.

[0067] For example, if the natural thrust of the wind turbine sailboat is insufficient, the propeller 51 is also driven. Depending on the wind direction, if the wind power propulsion system 1 is more efficient than the propeller 51, the electric motor 41 is driven to increase its rotational speed and thus increase thrust. On the other hand, if the propeller 51 is more efficient than the wind power propulsion system 1, the wind power propulsion system 1 is left in a naturally starting state, and the propeller 51 is rotated to generate thrust. It is also possible to drive both the electric motor 41 of the wind power propulsion system 1 and the propeller 51.

[0068] For example, the rotational moment of a ship can be adjusted by arranging multiple windmill sails on the hull. For instance, multiple windmill sails can be arranged fore and aft on the hull, and the rotation speeds of the fore and aft windmill sails can be made different. This can generate a moment by making the forces acting on the ship in the lateral direction different for the fore and aft windmill sails.

[0069] <Rudder control section> Referring to Figure 2, the wind propulsion system 100 further includes a rudder control unit 125 that controls the rudder so as to turn in the opposite direction to the inertial force generated in the opposite direction to the direction in which the rotational speed of the blades 10A to 10H is changed by the rotation control unit 40. This allows the rudder to work in conjunction with the rudder to prevent the hull 3 from rotating, anticipating that torque will act on the hull 3 due to the aforementioned inertial force.

[0070] For example, when changing the rotational speed of the blades 10A to 10H by driving or braking, the rudder may be used in conjunction with the propulsion system. For example, when the electric motor 41 is in a free state and the blades 10A to 10H are rotating freely, it is not necessary to use the rudder in conjunction with the propulsion system. For example, if the brakes are applied or the propulsion system is driven to change the rotational speed of the blades 10A to 10H, torque will act on the hull 3, and the hull 3 may rotate. To prevent this, if only one wind propulsion system 1 is installed, it is advisable to anticipate that torque will act on the hull 3 and use the rudder in conjunction with the propulsion system to prevent the hull 3 from rotating.

[0071] <Wind propulsion device> Referring to Figures 1 and 2, the wind power propulsion device 1 is installed on the ship 2 and functions as a wind turbine sail that generates thrust by receiving wind. In the example shown in the figures, one wind power propulsion device 1 is installed on the forward part (bow) of the hull 3. Note that the installation configuration of the wind power propulsion device 1 (installation location, number of units, etc.) is not limited to the above and can be changed according to the design specifications.

[0072] <Windmill sail body> Figure 4 is a perspective view of the wind turbine sail body 111 in the wind power propulsion device 1 of the first embodiment. Referring also to Figure 4, the wind propulsion device 1 includes a wind turbine sail body 111 that can rotate around a rotation axis RC (a dashed line shown in Figure 4) that extends vertically from the hull 3. The wind turbine sail body 111 includes an assembly 4 consisting of a rotating body 20 that can rotate around the axis RC, and a plurality of blades 10A to 10I, each fixed to the rotating body 20.

[0073] The rotating body 20 has a frame portion 21 formed in an annular shape around a rotation axis RC, and is configured to be rotatable around the rotation axis RC. In the example shown in the figure, the rotating body 20 is composed of a lower frame portion 21 to which the lower ends of a plurality of wings 10A to 10I are fixed, and an upper frame portion 21 to which the upper ends of a plurality of wings 10A to 10I are fixed. The rotating body 20 is equipped with a support structure 25 that includes a plurality of support columns 26 to 28 connected to the upper and lower frame portions 21 and supporting the plurality of wings 10A to 10I respectively.

[0074] Multiple wings 10A to 10I are each fixed to the frame 21, and are positioned so that imaginary lines connecting their respective ends are parallel in a direction perpendicular to the rotation axis RC. Multiple wings 10A to 10I include a central wing 10A whose imaginary line connecting its respective ends passes through the center of the frame 21. Multiple wings 10A to 10I are positioned so that their ends lie on an imaginary circle centered on the rotation axis RC. The axial direction along the rotation axis RC is the vertical direction.

[0075] When viewed from the vertical, the wings 10A to 10I closest to the center of the frame 21 are positioned such that the length of the imaginary straight line is at least half the diameter of the frame 21. In the example shown, the wings 10A to 10I closest to the center of the frame 21 are those other than the outermost wing. The length of the imaginary straight line is the length from one end of the wing to the other, also known as the chord length. The outermost wing among the wings 10A to 10I may have a chord length of less than half the diameter of the frame 21 (an imaginary circle centered on the rotation axis RC). Note that the chord lengths of the wings 10A to 10I are not limited to the above and can be changed according to the design specifications.

[0076] In the example shown in the figure, the frame 21 (a virtual circle centered on the rotation axis RC) is a perfect circle when viewed from the vertical. Note that the shape of the virtual circle when viewed from the vertical is not limited to the above; it could be an ellipse, an oblong, or a closed ring formed by connecting curves.

[0077] The support structure 25 comprises, when viewed from the vertical direction, a central column 26 provided at the center of the frame 21, a pair of support columns 27 provided at both ends of a virtual straight line, and a horizontal column 28 provided so as to span both ends of the virtual straight line. The central column 26, the pair of support columns 27, and the upper and lower horizontal columns 28 are each made of, for example, metal.

[0078] The rotating body 20 is further provided with a rod-shaped beam section 22 (horizontal bar) whose ends are connected to the inner circumference of the frame section 21 and which connects the multiple wings 10A to 10I to each other. In the example shown in the figure, the beam section 22 passes through the center of the frame section 21 and its ends are connected to the inner circumference of the frame section 21. One beam section 22 is provided on each of the upper and lower frame sections 21. Note that the configuration of the beam section 22 (number and arrangement, etc.) is not limited to the above and can be changed according to the design specifications.

[0079] In the example shown in the figure, the central column 26 is formed in a cylindrical shape. The pair of support columns 27 are each formed in a cylindrical shape with a smaller diameter than the central column 26. The pair of support columns 27 are formed in the same shape as each other. The horizontal column 28 that supports the central wing 10A is formed in a rhomboid shape when viewed from the vertical direction. The horizontal columns 28 that support the wings 10B to 10I other than the central wing 10A are formed in an I-shape (straight line) when viewed from the vertical direction. Note that the columns that support the multiple wings 10A to 10I, including the central wing 10A, may also be formed in an I-shape (straight line) when viewed from the vertical direction. The configuration (number, configuration, shape, etc.) of the columns that support the multiple wings 10A to 10I, including the central wing 10A, is not limited to the above and can be changed according to the design specifications.

[0080] The central wing 10A is positioned such that a virtual straight line connecting its two ends passes through the center of the frame 21. In the example shown, the central wing 10A is made of fabric stretched over a central column 26, a pair of support columns 27, and upper and lower horizontal columns 28. The wings 10B to 10I other than the central wing 10A are made of fabric stretched over a pair of support columns 27 and upper and lower horizontal columns 28. Note that the wings 10B to 10I other than the central wing 10A may be made of fabric, and only the central wing 10A may be made of FRP (resin). For example, at least one of the multiple wings 10A to 10I may be made of fabric, and the wings other than fabric may be made of resin.

[0081] In the example in Figure 4, assembly 4 has one stage, but the number of stages in assembly 4 can be changed according to the design specifications, and is not limited to the above. In the example in Figure 1, multiple assemblies 4A to 4C are provided along the vertical direction (for example, three). For example, if there are multiple assemblies 4, A and B, the rotating body 20 of assembly 4A and assembly 4B may be common. For example, the installation method of the rotating body 20 for multiple assemblies 4 can be changed according to the design specifications. Also, assemblies 4 A and B may have the same shape, and the rotating body 20 may be bolted together or welded.

[0082] Multiple wings 10A to 10I may be twisted such that a first imaginary straight line connecting the ends of each wing 10A to 10I at a first position on the rotation axis RC (the dashed line shown in the figure) intersects with a second imaginary straight line connecting the ends of each wing 10A to 10I at a second position different from the first position on the rotation axis RC when viewed from the vertical. In other words, multiple wings 10A to 10I may be twisted such that their cross-sections perpendicular to the vertical direction are the same at any position on the rotation axis. Note that the twisting pattern (shape, etc.) of the multiple wings is not limited to the above and can be changed according to the design specifications.

[0083] <Effects and Effects> As described above, the wind propulsion device 1 according to this embodiment is a wind propulsion device installed on the hull 2 ​​that generates thrust by receiving wind. The wind propulsion device 1 has a frame portion 21 formed in an annular shape around a rotation axis RC and comprises a rotating body 20 that can rotate around the rotation axis RC, and a plurality of blades 10A to 10I that are provided such that imaginary straight lines connecting their respective ends in a direction perpendicular to the rotation axis RC are parallel. The rotating body 20 comprises a support structure 25 that is connected to the frame portion 21 and includes a plurality of support columns 26 to 28 that support the plurality of blades 10A to 10I respectively.

[0084] With this configuration, the multiple wings 10A to 10I are supported by multiple support columns 26 to 28 of the support structure 25, thereby improving the rigidity of the wind propulsion device 1 compared to when it is supported only by the central column. Furthermore, the following effects (1) and (2) can be obtained due to the improved rigidity. (1) Strength increases, and the stress applied to the member decreases. (2) The natural frequency increases, making it less likely to resonate due to rotation.

[0085] <Second Embodiment> The following describes the wind power propulsion device 201 (wire type) according to the second embodiment. In the following description, parts having the same functions as those described in the first embodiment will be given the same names and reference numerals, and a detailed explanation of their functions will be omitted.

[0086] Figure 5 is a perspective view of the wind power propulsion device 201 (wire type) of the second embodiment. As shown in Figure 5, in the wind propulsion device 201 of the second embodiment, the support structure 225 is connected to the frame 21 and includes a plurality of wires 227, 228 (tension structure) that support a plurality of blades 10A to 10I, respectively. The support structure 225, when viewed from the vertical direction, includes a central column 26 provided at the center of the frame 21, a pair of vertical wires 227 provided at both ends of a virtual straight line, and a horizontal wire 228 provided so as to span both ends of the virtual straight line. The pair of vertical wires 227 and the upper and lower horizontal wires 228 are each made of metal, for example. The central blade 10A is made of cloth stretched between the central column 26, the pair of vertical wires 227, and the upper and lower horizontal wires 228. The blades 10B to 10I other than the central blade 10A are made of cloth stretched between the pair of vertical wires 227 and the upper and lower horizontal wires 228.

[0087] In the example shown in Figure 5, the shape of the support structure 225, when the central column 26 and the horizontal wires 228 are combined, is formed in a Q-shape when viewed from the vertical. The multiple wires 227 and 228 are formed in a linear shape with a smaller diameter than the support column 27 of the first embodiment. The fabric of the central wing 10A is formed in a rhomboid shape when viewed from the vertical. The multiple wires 227 and 228 may each pass through a part (edge) of the multiple wings 10A to 10I. Note that the configuration (number, configuration, shape, etc.) of the multiple wires 227 and 228 constituting the support structure 225 is not limited to the above and can be changed according to the design specifications.

[0088] The support structure 225 according to this embodiment includes a plurality of wires 227, 228 that are connected to the frame 21 and each support a plurality of wings 10A to 10I. This configuration allows for a lighter design and offers aerodynamic advantages compared to a design where multiple wings 10A to 10I are supported by struts.

[0089] <Third Embodiment> The following describes the wind-powered propulsion device 301 (spoke type) according to the third embodiment. In the following description, parts having the same functions as those described in the first embodiment will be given the same names and reference numerals, and a detailed explanation of their functions will be omitted.

[0090] Figure 6 is a perspective view of the wind propulsion device 301 (spoke type) of the third embodiment. In Figure 6, the upper frame portion 21 is not shown. As shown in Figure 6, in the wind propulsion device 301 of the third embodiment, the support structure 325 further comprises a central column 26 provided at the center of the frame 21 when viewed from the axial direction along the rotation axis RC, and a plurality of spokes 328 extending radially from the central column 26 and connected to the frame 21.

[0091] In the example shown in Figure 6, each of the spokes 328 is formed in a cylindrical shape. Each of the spokes 328 is formed in the same shape. When viewed from the vertical direction, each of the spokes 328 is a cylindrical shape of the same length, extending radially from the central column 26 at equal intervals in the circumferential direction. Each of the spokes 328 has one end connected to the central column 26 and the other end connected to the support column 27 via the frame 21. The configuration of the spokes 328 (number, configuration, shape, connection relationship, etc.) is not limited to the above and can be changed according to the design specifications.

[0092] The support structure 325 according to this embodiment further comprises a central column 26 provided at the center of the frame portion 21 when viewed from the axial direction along the rotation axis RC, and a plurality of spoke portions 328 extending radially from the central column 26 and connected to the frame portion 21. This configuration improves rigidity compared to a configuration without a central column 26 and multiple spoke sections 328 (a fully cylindrical type).

[0093] <Fourth Embodiment> The following describes the wind propulsion device 401 (wing-supported type) according to the fourth embodiment. In the following description, parts having the same functions as those described in the first embodiment will be given the same names and reference numerals, and a detailed explanation of their functions will be omitted.

[0094] Figure 7 is a perspective view of the wind propulsion device 401 (in-wing support type) of the fourth embodiment. As shown in Figure 7, in the wind propulsion device 401 of the fourth embodiment, the support structure 425 further comprises a central column 26 provided at the center of the frame 21 when viewed from the axial direction along the rotation axis RC, and a plurality of wing-internal beams 429 that extend radially outward from the central column 26 and whose outer ends are connected to a plurality of support columns 27, and which are provided inside each of the plurality of wings 10A to 10I.

[0095] In the example shown in Figure 7, the multiple wing-internal beam sections 429 are composed of two beam sections that intersect each other while extending radially outward from the central column 26. One wing-internal beam section 429 extends radially outward and vertically downward from the upper end of the central column 26 (the radially inner end of the upper horizontal column 28), and its outer end is connected to the radially outer end of the lower horizontal column 28 (the lower end of the support column 27 via the frame section 21). The other wing-internal beam section 429 extends radially outward and vertically upward from the lower end of the central column 26 (the radially inner end of the lower horizontal column 28), and its outer end is connected to the radially outer end of the upper horizontal column 28 (the upper end of the support column 27 via the frame section 21). Note that the configuration of the multiple wing-internal beam sections 429 (number, configuration, shape, connection relationship, etc.) is not limited to the above and can be changed according to the design specifications.

[0096] The support structure 425 according to this embodiment further comprises a central column 26 provided at the center of the frame portion 21 when viewed from the axial direction along the rotation axis RC, and a plurality of wing-internal beam portions 429 that extend radially outward from the central column 26, with their outer ends connected to a plurality of support columns 27 and provided inside each of the plurality of wings 10A to 10I. This configuration improves rigidity compared to the case without the central column 26 and multiple wing-internal beam sections 429 (a fully cylindrical type).

[0097] <Fifth Embodiment> The following describes the wind power propulsion device 501 (fully cylindrical type) according to the fifth embodiment. In the following description, parts having the same functions as those described in the first embodiment will be given the same names and reference numerals, and a detailed explanation of their functions will be omitted.

[0098] Figure 8 is a perspective view of the wind propulsion device 501 (fully cylindrical type) of the fifth embodiment. In Figure 8, the upper frame portion 21 is not shown. As shown in Figure 8, in the wind propulsion device 501 of the fifth embodiment, an internal space 525S is formed inside the support structure 525 that communicates axially along the rotation axis RC. The multiple support columns 27 are arranged at equal intervals in the circumferential direction of the frame portion 21. The multiple support columns 27 and the frame portion 21 are provided so as to be located within a virtual cylinder centered on the rotation axis RC. The multiple blades 10A to 10I extend across the internal space 525S, and both ends of each are supported by the multiple support columns 27.

[0099] In the example shown in Figure 8, the central column 26 is not provided in the internal space 525S. The central wing 10A, which extends across the internal space 525S, is formed in a rhomboid shape when viewed from the vertical. The wings 10B to 10I, other than the central wing 10A, are formed in an I-shape (straight line) when viewed from the vertical. Note that the configuration (number, composition, shape, etc.) of the multiple wings 10A to 10I, including the central wing 10A, is not limited to the above and can be changed according to the design specifications.

[0100] Inside the support structure 525 according to this embodiment, an internal space 525S is formed that communicates axially along the rotation axis RC. The multiple support columns 27 are arranged at equal intervals in the circumferential direction of the frame portion 21. The multiple support columns 27 and the frame portion 21 are provided so as to be located within a virtual cylinder centered on the rotation axis RC. The multiple wings 10A to 10I extend across the internal space 525S, and both ends of each are supported by the multiple support columns 27. This configuration reduces manufacturing costs compared to configurations with a central column 26 (spoke type and wing-supported type).

[0101] <Sixth Embodiment> The wind propulsion device 601 (trapezoidal blade) according to the sixth embodiment will be described below. In the following description, parts having the same functions as those described in the first embodiment will be given the same names and reference numerals, and a detailed explanation of their functions will be omitted.

[0102] Figure 9 is a perspective view of the wind propulsion device 601 (trapezoidal blade) of the sixth embodiment. In Figure 9, the rotating body 20 having the frame portion 21 is omitted from the illustration. Figure 10 is a schematic diagram of the trapezoidal support column of the wind propulsion device 601 of the sixth embodiment. In Figure 10, the illustration of the multiple blades 610A to 610G is omitted. Referring together to Figures 9 and 10, in the wind propulsion device 601 of the sixth embodiment, the axial ends of two of the multiple blades 610A to 610G, which are arranged symmetrically with respect to the line containing the rotation axis RC, are provided such that they form a trapezoid when viewed from a direction parallel to the imaginary line.

[0103] In the example shown in Figure 9, the wings are twisted so that the vertical end positions of the two wings (wings 610B and 610G, 610C and 610F, and 610D and 610E, excluding the central wing 610A) are not parallel when viewed from a direction perpendicular to the vertical line, as they are positioned symmetrically with respect to the line containing the rotation axis RC. Note that the configuration (number, shape, etc.) of the multiple wings 610A to 610G is not limited to the above and can be changed according to the design specifications.

[0104] The rotating body 20 is connected to the frame 21 and has multiple support columns 27 that each support one of the multiple wings 610A to 610G. When viewed from a direction parallel to the imaginary straight line, the two outermost of the multiple support columns 27, centered on the rotation axis RC, are arranged to follow the trapezoidal legs.

[0105] Figure 10 is an example of a two-dimensional representation of Figure 9. Conventional parallel wings have a twist, but the wings themselves are nearly parallel. A trapezoidal wing is created by twisting parallel wings and then tilting and fixing them in place, as shown in Figure 10.

[0106] In the wind propulsion device 601 according to this embodiment, two of the multiple blades 610A to 610G, which are arranged symmetrically with respect to a line containing the rotation axis RC, have their axial ends along the rotation axis RC positioned such that they form a trapezoid when viewed from a direction parallel to the imaginary line. This configuration improves rigidity compared to the case where the axial ends of two wings, arranged symmetrically, form a parallelogram when viewed from a direction parallel to a virtual straight line.

[0107] The rotating body 20 according to this embodiment has a plurality of support columns 27 connected to the frame portion 21 and each supporting a plurality of wings 610A to 610G. When viewed from a direction parallel to a virtual straight line, the two outermost of the plurality of support columns 27, centered on the rotation axis RC, are provided to follow trapezoidal legs. This configuration improves rigidity compared to the case where the two outer support columns 27 are arranged parallel to each other.

[0108] <Seventh Embodiment> The following describes the wind power propulsion device 701 (split model) according to the seventh embodiment. In the following description, parts having the same functions as those described in the first embodiment will be given the same names and reference numerals, and a detailed explanation of their functions will be omitted.

[0109] Figure 11 is a perspective view showing a segmented model of the wind power propulsion device 701 of the seventh embodiment. Figure 12 is a perspective view showing a small assembly 770 of the wind power propulsion device 701 of the seventh embodiment. Referring together to Figures 11 and 12, the wind propulsion device 701 of the seventh embodiment includes a rotating body 20 and assemblies 704A to 704C consisting of a plurality of blades 710A to 710E. The assemblies 704A to 704C are arranged in the circumferential or radial direction of the frame 21 and include a plurality of small assemblies 770 that are detachably connected to one another.

[0110] In the example shown in Figure 11, each assembly 704A to 704C comprises two smaller assemblies 770 arranged side by side in the circumferential and radial directions of the frame 12 and detachably connected to one another. The two smaller assemblies 770 are formed to be the same shape. In one assembly 704B, one of the smaller assemblies 770 is not shown. Note that the configuration (number, shape, etc.) of the multiple smaller assemblies 770 is not limited to the above and can be changed according to the design specifications.

[0111] The small assembly 770 includes an upper frame member 771 and a lower frame member 772, which are formed in a semicircular shape when viewed from the axial direction along the rotation axis RC. The multiple wings 710A to 710E have their upper vertices connected to the upper frame member 771 and their lower vertices connected to the lower frame member 772.

[0112] For example, the upper frame member 771 and the lower frame member 772 are each made of metal. The multiple wings 710A to 710E are each made of, for example, GFRP (Glass Fiber Reinforced Plastics). The upper frame member 771 and the lower frame member 772 each have multiple grooves formed in their opposing portions for fitting the wings 710A to 710E. The upper vertices of the multiple wings 710A to 710E are fitted into the grooves of the upper frame member 771, and the lower vertices are fitted into the grooves of the lower frame member 772. The wings 710A to 710E may be made of wood, other resins, or a composite material of wood and resin. The wings 710A to 710E may be bolted together or welded. The configuration (material, shape, connection relationship) of the upper frame member 771 and the lower frame member 772 and the multiple wings 710A to 710E is not limited to the above and can be changed according to the design specifications.

[0113] The wind propulsion device 701 according to this embodiment includes a rotating body 20 and assemblies 704A to 704C consisting of a plurality of blades 710A to 710E. The assemblies 704A to 704C are arranged in the circumferential or radial direction of the frame 21 and include a plurality of small assemblies 770 that are detachably connected to one another. This configuration allows the assemblies 704A to 704C to be divided into multiple smaller assemblies 770, thus reducing transportation costs compared to cases where they cannot be divided.

[0114] The small assembly 770 according to this embodiment includes an upper frame member 771 and a lower frame member 772, which are formed in a semicircular shape when viewed from the axial direction along the rotation axis RC. The multiple wings 710A to 710E have their upper vertices connected to the upper frame member 771 and their lower vertices connected to the lower frame member 772. This configuration allows the small assembly 770 to be divided into an upper frame member 771, a lower frame member 772, and multiple wings 710A to 710E, thus reducing transportation costs compared to a configuration where it cannot be divided. For example, by dividing the small assembly 770, it can be transported by sea without the need for a dedicated vessel.

[0115] <Eighth Embodiment> The following describes the wind power propulsion device 801 (semicircular stacking type) according to the eighth embodiment. In the following description, parts having the same functions as those described in the seventh embodiment will be given the same names and reference numerals, and a detailed explanation of their functions will be omitted.

[0116] Figure 13 is a perspective view showing the wind propulsion device 801 (semicircular stacking type) of the eighth embodiment. As shown in Figure 13, in the eighth embodiment of the wind propulsion device 801, the multiple small assemblies 870A and 870B consist of two small assemblies 870A and 870B, each formed in a semicircular shape when viewed from the axial direction along the rotation axis RC. Multiple assemblies 804A to 804D are provided along the axial direction. The multiple assemblies 804A to 804D are stacked such that each pair of small assemblies 870A and 870B is offset in the circumferential direction and overlaps when viewed from the axial direction.

[0117] In the example shown in Figure 13, the central wing 810A is divided radially. One of the two sub-assemblies 870A and 870B that make up the bottommost assembly 804A are stacked on top of the other sub-assemblies 870A and 870B that make up the second-to-last assembly 804B, offset circumferentially and overlapping when viewed axially. The multiple sub-assemblies 870A and 870B, including the divided central wing 810A, are joined together so that the curves are aerodynamically smooth. In the second-to-last assembly 804B, one of the sub-assemblies 870B is not shown. Note that the configuration (number, shape, connection relationship) of the multiple sub-assemblies 870A and 870B is not limited to the above and can be changed according to the design specifications.

[0118] The multiple small assemblies 870A and 870B according to this embodiment consist of two small assemblies 870A and 870B, each formed in a semicircular shape when viewed from the axial direction along the rotation axis RC. Multiple assemblies 804A to 804D are provided along the axial direction. The multiple assemblies 804A to 804D are stacked such that each pair of small assemblies 870A and 870B is offset in the circumferential direction and overlaps when viewed from the axial direction. With this configuration, the small assemblies 870A and 870B are less likely to separate compared to the case where the two small assemblies 870A and 870B in each of the multiple assemblies 804A to 804D are stacked without shifting in the circumferential direction.

[0119] <Ninth Embodiment> The following describes the wind power propulsion device 901 (a model using steel) according to the ninth embodiment. In the following description, parts having the same functions as those described in the first embodiment will be given the same names and reference numerals, and a detailed explanation of their functions will be omitted.

[0120] Figure 14 is a perspective view showing the wind power propulsion device 901 (a model using steel) according to the ninth embodiment. Figure 15 is a perspective view showing the small assembly 970 (a support column type) of the wind power propulsion device 901 according to the ninth embodiment. Referring together to Figures 14 and 15, each of the multiple small assemblies 970 comprises an arc-shaped portion 971 that constitutes the frame portion 21 and is formed in an arc shape when viewed from the axial direction of the rotation axis RC, and a plurality of support columns 927, 928 that are detachably connected to the arc-shaped portion 971.

[0121] In the example shown in Figure 14, three small assemblies 970 are provided for each assembly. The arc-shaped portion 971 is provided in each small assemblies 970 by dividing the frame portion 21 into three sections in the circumferential direction. Six support columns 927 and 928 are provided for each small assemblies 970. The small assemblies 970 include arc-shaped connecting members 972 that connect parts (longitudinal central portions) of the support columns 928. Note that the configuration (number, structure, and connection relationships) of the multiple small assemblies 970 is not limited to the above and can be changed according to the design specifications.

[0122] The multiple small assemblies 970 according to this embodiment include an arc-shaped portion 971 that constitutes a frame and is formed in an arc shape when viewed from the axial direction of the rotation axis, and a plurality of support columns 927, 928 that are detachably connected to the arc-shaped portion 971. With this configuration, the small assembly 970 can be divided into an arc-shaped section 971 and multiple support columns 927, 928, thus reducing transportation costs compared to when it cannot be divided.

[0123] <Tenth Embodiment> The following describes the wind propulsion device 1001 (Example 1 of vertical continuity) according to the tenth embodiment. In the following description, parts having the same functions as those described in the first embodiment will be given the same names and reference numerals, and a detailed explanation of their functions will be omitted.

[0124] Figure 16 is a schematic diagram of the wind power propulsion device 1001 of the 10th embodiment (example 1 of vertical continuity). Figure 17 is a side view of the multiple assemblies 1004A to 1004D of the wind power propulsion device 1001 of the 10th embodiment. Figure 18 is a cross-sectional view of the multiple blades 1010A to 1010G of the wind power propulsion device 1001 of the 10th embodiment. Referring together to Figures 16 to 18, in the wind propulsion device 1001 of the tenth embodiment, the axial ends of two of the multiple blades 1010A to 1010G, which are arranged symmetrically with respect to the line containing the rotation axis RC, are arranged so as to form a trapezoid when viewed from a direction parallel to the virtual line. When viewed from a direction parallel to the virtual line, the multiple assemblies 1004A to 1004D are arranged so that one axial end of each of the multiple blades 1010B to 1010G is connected to the other axial end of a blade 1010B to 1010G that is shifted one position inward or outward around the rotation axis RC.

[0125] In the example shown in Figure 16, when viewed from a direction parallel to the virtual straight line, the upper vertical ends of the two outer wings 1010B and 1010G, 1010C and 1010F that make up the bottom assembly 1004A are connected to the lower vertical ends of the two inner wings 1010C and 1010F, 1010D and 1010E (wings shifted one position inward around the rotation axis RC) that make up the second assembly 1004B from the bottom. Similarly, the upper vertical ends of the two outer wings 1010B, 1010G, 1010C, and 1010F that constitute the second-to-last assembly 1004B are connected to the lower vertical ends of the two inner wings 1010C, 1010F, 1010D, and 1010E (wings shifted one position inward around the rotation axis RC) that constitute the third-to-last assembly 1004C. Similarly, the upper vertical ends of the two outer wings that constitute the third-to-last assembly 1004C are connected to the lower vertical ends of the two inner wings that constitute the fourth-to-last (topmost) assembly 1004D. Note that the configuration (number and connection relationships) of the multiple assemblies 1004A to 1004D is not limited to the above and can be changed according to the design specifications.

[0126] In the wind propulsion device 1001 according to this embodiment, two of the multiple blades 1010A to 1010G, which are arranged symmetrically with respect to a line containing the rotation axis RC, have their axial ends along the rotation axis RC positioned such that they form a trapezoid when viewed from a direction parallel to the imaginary line. When viewed from a direction parallel to the imaginary line, the multiple assemblies 1004A to 1004D are arranged such that one axial end of each of the multiple blades 1010B to 1010G is connected to the other axial end of a blade 1010B to 1010G that is shifted one position inward or outward around the rotation axis RC. This configuration allows for the smooth connection of multiple wings 1010B to 1010G of multiple assemblies 1004A to 1004D, which are offset by one position, thus preventing disruption of airflow.

[0127] <Embodiment 11> The following describes the wind propulsion device 1101 (Example 2 of vertical continuity) according to the 11th embodiment. In the following description, parts having the same functions as those described in the 10th embodiment will be given the same names and reference numerals, and a detailed explanation of their functions will be omitted.

[0128] Figure 19 is a schematic diagram of the wind power propulsion device 1101 of the 11th embodiment (example 2 of vertical continuity). Figure 20 is a side view of multiple assemblies of the wind power propulsion device 1101 of the 11th embodiment. Referring together to Figures 19 and 20, in the wind propulsion device 1101 of the 11th embodiment, the axial ends of two of the multiple blades 1110A to 1110G that are arranged symmetrically with respect to the line containing the rotation axis RC are positioned such that they form a trapezoid when viewed from a direction parallel to the virtual line. When viewed from a direction parallel to the virtual line, two axially adjacent assemblies 1104A to 1104D are stacked such that their respective multiple blades 1110B to 1110G are aligned along opposite trapezoidal legs.

[0129] In the example shown in Figure 19, when viewed from a direction parallel to the virtual straight line, the bottom assembly 1104A and the second-to-last assembly 1104B are stacked such that their respective wings 1110B-1110G align with inverted trapezoidal legs. Similarly, the second-to-last assembly 1104B and the third-to-last assembly 1104C are stacked such that their respective wings 1110B-1110G align with inverted trapezoidal legs. Similarly, the third-to-last assembly 1104C and the fourth-to-last (topmost) assembly 1104D are stacked such that their respective wings align with inverted trapezoidal legs. Note that the configuration (number and connection relationship) of the multiple assemblies 1104A-1104D is not limited to the above and can be changed according to the design specifications.

[0130] In the wind propulsion device 1101 according to this embodiment, of the multiple blades 1110A to 1110G, two blades arranged symmetrically with respect to the line containing the rotation axis RC have their axial ends along the rotation axis RC positioned such that they form a trapezoid when viewed from a direction parallel to the imaginary line. When viewed from a direction parallel to the imaginary line, two axially adjacent assemblies 1104A to 1104D are stacked such that their respective multiple blades 1110B to 1110G are aligned along opposite trapezoidal legs. With this configuration, two sets of wings 1110B to 1110G from the multiple assemblies 1104A to 1104D that are adjacent in the axial direction are arranged in a zigzag pattern, allowing identical wings 1110B to 1110G to be connected to each other.

[0131] <Twelfth Embodiment> The following describes the wind power propulsion device 1201 (combination type of support structure and central wing) according to the 12th embodiment. In the following description, parts having the same functions as those described in the first embodiment will be given the same names and reference numerals, and a detailed explanation of their functions will be omitted.

[0132] Figure 21 is a side view of the wind power propulsion device 1201 (combination type of support structure and central wing) of the 12th embodiment. Figure 22 is a perspective view of the assembly of the wind power propulsion device 1201 of the 12th embodiment. Referring together to Figures 21 and 22, the wind propulsion device 1201 of the twelfth embodiment includes a support structure 1225 including a plurality of support columns 27 connected to the frame 21, and a central wing 1210A whose virtual straight line connecting both ends passes through the center of the frame 21.

[0133] In the examples in Figures 21 and 22, the wings other than the central wing 1210A are not shown. In the example in Figure 21, a five-stage assembly 1204A to 1204E is shown, but the number of stages in the assembly can be changed according to the design specifications, and is not limited to the above.

[0134] The support structure 1225 comprises a pair of support columns 27 provided at both ends of a virtual straight line when viewed from the vertical direction, and a horizontal column 28 provided so as to span both ends of the virtual straight line. The central wing 1210A has a hollow structure. The central wing 1210A may also have a solid structure. The upper and lower frame portions 21 are each made of, for example, metal. The central wing 1210A is made of, for example, GFRP (Glass Fiber Reinforced Plastics). The upper and lower frame portions 21 each have multiple grooves formed in their opposing parts for fitting the central wing 1210A. The upper apex of the central wing 1210A is fitted into the groove of the upper frame portion 21, and the lower apex is fitted into the groove of the lower frame portion 21. The central wing 1210A may be bolted or welded. Furthermore, the configuration (material, shape, and connection relationship) of the upper and lower frame sections 21 and the central wing 1210A is not limited to the above and can be changed according to the design specifications.

[0135] The wind propulsion device 1201 according to this embodiment includes a support structure 1225 that includes a plurality of support columns 27 connected to a frame 21, and a central wing 1210A whose virtual straight line connecting both ends passes through the center of the frame 21. This configuration reduces manufacturing costs compared to having a central column within the frame 21.

[0136] <13th Embodiment> The following describes the wind power propulsion device 1301 (multi-stage stacking type) according to the 13th embodiment. In the following description, parts having the same functions as those described in the first embodiment will be given the same names and reference numerals, and a detailed explanation of their functions will be omitted.

[0137] Figure 23 shows the wind power propulsion device 1301 of the 13th embodiment. As shown in Figure 23, the wind propulsion device 1301 of the 13th embodiment includes an assembly 1304 consisting of a rotating body and a plurality of blades. Multiple assemblies 1304 are provided along the axial direction of the rotating shaft RC. If the number of multiple assemblies 1304 is N and M is a natural number, the multiple assemblies 1304 are arranged with a offset of 180 × M / N degrees from each other. The multiple assemblies 1304 may be stacked vertically, for example, so that the height of the wind turbine sail body 1311 is 30 m or more.

[0138] In the example shown in Figure 23, five of the multiple assemblies 1304A to 1304E are arranged at a 36-degree angle to each other. The five assemblies 1304A to 1304E are stacked vertically, for example, to a height of approximately 10m. Note that the configuration of the multiple assemblies (number and arrangement, etc.) is not limited to the above and can be changed according to the design specifications.

[0139] An end plate 1306 is provided at the top of the wind turbine sail body 1311. The outer shape of the end plate 1306 may be a circle that is larger than the outermost shape of the wind turbine sail body 1311 when viewed from the vertical. The end plate 1306 may be bolted or welded to the upper frame portion 21 of the uppermost assembly 1304 of the wind turbine sail body 1311. By providing the end plate 1306 at the top of the wind turbine sail body 1311, the lift can be increased.

[0140] The wind propulsion device 1301 according to this embodiment includes an assembly 1304 consisting of a rotating body and a plurality of blades. Multiple assemblies 1304 are provided along the axial direction of the rotating shaft RC. If the number of multiple assemblies 1304 is N and M is a natural number, the multiple assemblies 1304 are arranged so as to be offset from each other by 180 × M / N degrees. This configuration reduces the rotational angle dependence of the thrust force obtained from the wind. Furthermore, because the frame section 21 acts as a joint, local buckling can be suppressed.

[0141] <Variation> It should be noted that the technical scope of the present invention is not limited to the embodiments described above, and various modifications can be made without departing from the spirit of the invention.

[0142] Figure 24 is a schematic diagram of the first modified wind power propulsion device 1401A. Figure 25 is a schematic diagram of the second modified wind power propulsion device 1401B. Referring together to Figures 24 and 25, the wind power propulsion devices 1401A and 1401B may comprise multiple assemblies whose diameters decrease as they move upward in the vertical direction. In the example in Figure 24, there is a first assembly 1404A located at the bottom, a second assembly 1404B located second from the bottom and having a smaller diameter than the first assembly 1404A, and a third assembly 1404C located at the top and having a smaller diameter than the second assembly 1404B. For example, the lower part of the wind power propulsion device 1401A (first assembly 1404A) may be provided with metal (e.g., steel) supports (steel pipes) that are thicker than the supports that make up the other assemblies 1404B and 1404C. For example, the middle part of the wind power propulsion device 1401A (second assembly 1404B) may be provided with steel supports (steel pipes) that are thinner than the supports that make up the first assembly 1404A. For example, the upper part of the wind propulsion device 1401A (third assembly 1404C) may be equipped with a metal support column (aluminum pipe) that is lighter than the support columns that make up the other assemblies 1404A and 1404B.

[0143] In the example shown in Figure 25, the wind power propulsion device 1401B has a shape formed by stacking multiple assemblies vertically, with the upper vertical side being narrower. Note that the configuration (number, shape, material, etc.) of the multiple assemblies constituting the wind power propulsion devices 1401A and 1401B is not limited to the above and can be changed according to the design specifications.

[0144] Figure 26 is a schematic diagram of the third modified wind propulsion device 1501 (a model using steel). In Figure 26, the wings are not shown. As shown in Figure 26, the wind power propulsion device 1501 includes a support structure 1525 that includes a plurality of support columns 1527, 1528 connected to the frame 21. In this case, the rigidity of the wind power propulsion device 1501 can be maintained even without providing a central column 26 for the purpose of weight reduction. The example in Figure 26 shows a 12-stage assembly 1504, but the number of stages in the assembly can be changed according to the design specifications, and is not limited to the above. The support structure 1525 may include a plurality of metal (e.g., steel) support columns 1527 (steel pipes) that extend diagonally to the vertical direction, and a plurality of metal (e.g., steel) support columns 1528 (steel pipes) that extend parallel to the vertical direction. For example, the wind power propulsion device 1501 may be constructed by stacking a plurality of assemblies 1504, each having the same support structure 1525, in the vertical direction. Multiple assemblies 1504 may be arranged at predetermined angle differences such that the ends of their respective support columns 1527 and 1528 are connected via the frame portion 21 or the like. The support columns 1527 and 1528 may be bolted together or welded. The configuration of the support columns 1527 and 1528 (material, shape, connection relationship) is not limited to the above and can be changed according to the design specifications.

[0145] Figure 27 is a schematic diagram of the fourth modified wind propulsion device 1601 (another example of a fully cylindrical type). In Figure 27, the blades are not shown. As shown in Figure 27, in the wind propulsion device 1601, an internal space 1625S is formed inside the support structure 1625, communicating axially along the rotation axis RC. Multiple support columns 1627 are arranged at equal intervals in the radial direction of the frame 21. The multiple support columns 1627 and the frame 21 are provided so as to be located within a virtual cylinder centered on the rotation axis RC. Multiple blades (not shown) extend across the internal space 1625S, and both ends of each blade are supported by the multiple support columns 1627. In this case, arranging the multiple support columns 1627 at equal intervals in the radial direction rather than the circumferential direction improves the aerodynamic characteristics. In the example in Figure 27, there is no central column 26 in the internal space 1625S. Also, one side in the radial direction of the multiple support columns 1627 arranged at equal intervals in the radial direction of the frame 21 is shown, and the other side in the radial direction is not shown. At least some of the wings may be positioned so as to overlap with the struts 1627 when viewed from the vertical.

[0146] The following describes other examples (modifications) of mobile bodies to which the wind propulsion device of the above-described embodiment is installed. Ship sails, airplane wings, rotor blades, wind turbine blades, etc., are all similar in that they generate lift, and the present invention, which has the effect of generating electricity while generating a large lift (Magnus force), can be applied to them. For example, the configuration of the above-described embodiment can also be applied to mobile bodies that move at high speed (e.g., high-speed ships, automobiles, etc.). Furthermore, the wind propulsion device may be applied to the wings of an aircraft, or to airplanes, drones, flying cars, etc. If water resistance is to be ignored, a railway may be used. For example, a wind propulsion device may be installed on a railway running on a local line with low utilization. The mechanism of a windmill sail is not limited to wind and can be applied to other fluids. For example, a ship could be moved across an ocean current to generate electricity (ocean current power generation). Ocean currents are slower but denser than air. The Kuroshio Current moves at about 2 m / s, but considering that it is 1000 times denser than air, this is equivalent to a wind blowing at 20 m / s. In the case of ships, transmitting electricity is difficult, and there are limits to how much electricity can be stored. Therefore, it is possible to build factories that frequently use electricity on ships (factory ships). Examples include hydrogen production and electrolytic aluminum refining. In this case, electricity can be transported directly to the point of demand by ship. For example, wind-powered propulsion systems could be installed on railway containers. In this case, electricity could be supplied to refrigerated containers, eliminating the need to supply power from the pantograph. Furthermore, since the system can be electrically isolated from the railway, the risk of accidents can be reduced. It could also be used as a power source for the brakes of freight cars. Similarly, wind-powered propulsion systems could be installed on truck containers or ship containers.

[0147] Processing may be performed by recording a program for realizing the functions of the control unit according to the above embodiment on a computer-readable recording medium, having a computer system read the program recorded on this recording medium, and executing it. Furthermore, the term "computer system" as used herein may include an operating system (OS) or hardware such as peripheral devices. Furthermore, "computer-readable recording media" refers to writable non-volatile memory such as flexible disks, magneto-optical disks, ROM (Read Only Memory), and flash memory, portable media such as DVDs (Digital Versatile Discs), and storage devices such as hard disks built into computer systems.

[0148] Furthermore, "computer-readable recording media" also includes volatile memory (such as DRAM (Dynamic Random Access Memory)) within information processing devices or client computer systems that retain programs for a certain period of time when programs are transmitted via networks such as the Internet or communication lines such as telephone lines. Furthermore, the above program may be transmitted from a computer system that stores the program in a memory device or the like to another computer system via a transmission medium or by transmission waves within the transmission medium. Here, the "transmission medium" used to transmit the program refers to a medium that has the function of transmitting information, such as a network (communication network) like the Internet or a communication line (communication line) like a telephone line. Furthermore, the above program may be intended to implement some of the functions described above. Moreover, the above program may be a so-called differential file (differential program) that can implement the functions described above in combination with a program already recorded in the computer system.

[0149] Furthermore, it is possible to replace the components in the above-described embodiments with well-known components without departing from the spirit of the present invention. Also, the above-described modifications may be combined. Among the embodiments disclosed herein, those composed of multiple objects may be integrated, and conversely, those composed of a single object may be divided into multiple objects. Whether or not they are integrated, the invention can be constructed in a way that achieves its objective. In the embodiments disclosed herein, those in which multiple functions are provided in a distributed manner may have some or all of those multiple functions integrated into a single unit, and conversely, those in which multiple functions are integrated may have some or all of those functions provided in a distributed manner. Whether the functions are integrated or distributed, the configuration should be such that the objective of the invention can be achieved. [Explanation of symbols]

[0150] 1,201,301,401,501,601,701,801,901,1001,1101,1201,1301,1401A,1401B,1501,1601...Wind propulsion device, 2...Ship (mobile object), 4,4A~4C,704A~ 704C,804A~804D,1004A~1004D,1104A~1104D,1204A~1204E,1304A~1304E,1404A~1404C,1504...Assembly, 10A~10I,610A~610I,710A ~710E, 810A, 1010A~1010G, 1110A~1110G, 1210A...wing, 20...rotating body, 21...frame section, 25, 225, 325, 425, 525, 1525, 1625...support structure, 26...central column, 27, 28, 927, 928, 1527, 1528, 1627...support column, 328...spoke section, 429...wing internal beam section, 525S, 1625S...internal space, 770, 870A, 870B, 970...small assembly, 771...upper frame member, 772...lower frame member, RC...rotating shaft

Claims

1. A wind-powered propulsion device installed on a moving object that generates thrust by receiving wind, A rotating body having a frame portion formed in an annular shape around a rotation axis, and being rotatable around the rotation axis, The system comprises a plurality of wings arranged such that virtual lines connecting their respective ends are parallel in a direction perpendicular to the rotation axis, The rotating body comprises a support structure including a plurality of support columns connected to the frame and each of the plurality of wings, Wind propulsion device.

2. The aforementioned support structure, when viewed from the axial direction along the rotation axis, A central column is provided at the center of the frame, The system further comprises a plurality of spokes extending radially from the central column and connected to the frame, The wind propulsion device according to claim 1.

3. The aforementioned support structure, when viewed from the axial direction along the rotation axis, A central column is provided at the center of the frame, The system further comprises a plurality of wing-internal beam sections extending radially outward from the central column, with their outer ends connected to the plurality of support columns and provided inside each of the plurality of wings, The wind propulsion device according to claim 1.

4. An internal space is formed inside the support structure that communicates in the axial direction along the rotation axis. The aforementioned plurality of support columns are arranged at equal intervals in the circumferential direction of the frame, The plurality of support columns and the frame portion are arranged to be located within a virtual cylinder centered on the rotation axis. The plurality of wings extend across the internal space, and each of their ends is supported by the plurality of struts. The wind propulsion device according to claim 1.

5. An internal space is formed inside the support structure that communicates in the axial direction along the rotation axis. The aforementioned plurality of support columns are arranged at equal intervals in the radial direction of the frame, The plurality of support columns and the frame portion are arranged to be located within a virtual cylinder centered on the rotation axis. The plurality of wings extend across the internal space, and each of their ends is supported by the plurality of struts. The wind propulsion device according to claim 1.

6. A wind-powered propulsion device installed on a moving object that generates thrust by receiving wind, A rotating body having a frame portion formed in an annular shape around a rotation axis, and being rotatable around the rotation axis, The system comprises a plurality of wings arranged such that virtual lines connecting their respective ends are parallel in a direction perpendicular to the rotation axis, Of the plurality of wings, two wings arranged symmetrically with respect to a line including the axis of rotation are provided such that their axial ends along the axis of rotation form a trapezoid when viewed from a direction parallel to the imaginary line. Wind propulsion device.

7. The rotating body further has a plurality of support columns connected to the frame and each of the plurality of wings, Viewed from a direction parallel to the aforementioned imaginary line, the two outermost of the plurality of support columns, with respect to the axis of rotation, are positioned along the trapezoidal legs. The wind propulsion device according to claim 6.

8. The assembly comprises the aforementioned rotating body and the plurality of wings, The assembly comprises a plurality of smaller assemblies arranged in the circumferential or radial direction of the frame and detachably connected to one another. A wind propulsion device according to any one of claims 1 to 7.

9. The aforementioned small assembly includes an upper frame member and a lower frame member, each formed in a semicircular shape when viewed from the axial direction along the rotation axis, The plurality of wings are such that their upper vertices are connected to the upper frame member and their lower vertices are connected to the lower frame member. The wind propulsion device according to claim 8.

10. The aforementioned group of small assemblies consists of two small assemblies, each formed in a semicircular shape when viewed from the axial direction along the axis of rotation. Multiple assemblies are provided along the axis of motion. The aforementioned multiple assemblies are stacked such that each of the two smaller assemblies is offset in the circumferential direction and overlaps when viewed from the axial direction. The wind propulsion device according to claim 8.

11. The aforementioned multiple small assemblies are The frame portion comprises an arc-shaped portion which is formed in an arc shape when viewed from the axial direction of the rotation shaft, It comprises a plurality of support columns that are detachably connected to the arc-shaped portion, The wind propulsion device according to claim 8.

12. The assembly comprises the aforementioned rotating body and the aforementioned plurality of wings, Multiple assemblies are provided along the axial direction of the rotation shaft, Let N be the number of the aforementioned assemblies, and let M be a natural number. Then the aforementioned assemblies are arranged so that they are offset from each other by 180 × M / N degrees. A wind propulsion device according to any one of claims 1 to 7.

13. Of the plurality of wings, two wings are provided symmetrically with respect to a line including the axis of rotation, and their axial ends along the axis of rotation are provided such that they form a trapezoid when viewed from a direction parallel to the imaginary line. Viewed from a direction parallel to the aforementioned virtual line, the plurality of assemblies are arranged such that one end of each of the plurality of wings in the axial direction is connected to the other end in the axial direction of a wing that is shifted one position inward or outward around the axis of rotation. The wind propulsion device according to claim 12.

14. Of the plurality of wings, two wings are provided symmetrically with respect to a line including the axis of rotation, and their axial ends along the axis of rotation are provided such that they form a trapezoid when viewed from a direction parallel to the imaginary line. Viewed from a direction parallel to the aforementioned virtual line, two of the plurality of assemblies that are adjacent in the axial direction are stacked such that their respective plurality of wings follow inverted trapezoidal legs. The wind propulsion device according to claim 12.

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