Marine boost-power generation device, system, and control method

Abstract

The application provides a marine boosting-power generation device, system and control method. The device comprises a main shaft, a plurality of circular-arc blades, a power generator and a driving motor. The main shaft is rotatably connected with a ship. The blade shafts of the plurality of circular-arc blades are parallel to the main shaft and are distributed at equal intervals around the main shaft. The plurality of circular-arc blades can rotate around their respective blade shafts to form a complete cylinder and can be fixedly connected with the main shaft by rotating around their respective blade shafts. The rotating shaft of the power generator is fixedly connected with the main shaft. The driving motor is used to drive the cylinder to rotate around the main shaft. The marine boosting-power generation device provided by the application can be flexibly switched between a wind boosting mode and a power generation mode.

Description

Technical Field

[0001] This application belongs to the technical field of marine propulsion devices, specifically, it provides a marine propulsion-generating device, system, and control method. Background Technology

[0002] To reduce fuel consumption of large vessels such as oil tankers and container ships navigating the ocean, it is necessary to carry out energy-saving modifications to the hull, propellers, main engines, and other components to reduce fuel costs and pollution emissions. Furthermore, large vessels have ample usable space on their decks; therefore, additional propulsion devices can be added to the decks and other areas to provide extra power for navigation.

[0003] Currently, there are various technical solutions to provide additional thrust to ships. For example, wind-powered propulsion rotors can be installed on the deck of container ships or oil tankers to provide thrust using the Magnus effect. Another example is the use of lightweight and rigid materials to manufacture rigid sails, and the optimization of the sail shape to improve its aerodynamic characteristics in order to enhance the overall thrust effect of the sail.

[0004] However, using a Magnus rotor for ship propulsion requires additional electrical energy, and using a single sail cannot flexibly adjust to the complex and ever-changing wind conditions during navigation; in addition, the aforementioned propulsion devices have limited functionality and can only be idle when the ship is in port or anchored. Summary of the Invention

[0005] To address the problems existing in the prior art, this application provides a marine propulsion-generator device through embodiments, comprising:

[0006] The system comprises a main shaft, several arc-shaped blades, a generator, and a drive motor; the main shaft is rotatably connected to the vessel; the blade axes of the several arc-shaped blades are all parallel to the main shaft and are distributed at equal intervals around the main shaft; the several arc-shaped blades can be rotated around their respective blade axes to form a complete cylinder, and can be rotated around their respective blade axes to be fixedly connected to the main shaft; the generator's rotating shaft is fixedly connected to the main shaft; the drive motor is used to drive the cylinder to rotate around the main shaft.

[0007] Preferably, the marine propulsion-generator further includes a first base and a bearing; the main shaft passes through the first base and is rotatably connected to the first base, the bearing is coaxially sleeved on the first base with the main shaft, and the inner ring of the bearing is fixedly connected to the bearing seat on the first base, and the blade shaft of each of the arc-shaped blades is fixedly connected to the upper end of the outer ring of the bearing.

[0008] Preferably, the marine propulsion-generator further includes a liftable limiting cylinder coaxially arranged with the main shaft. The diameter of the inner wall of the limiting cylinder is equal to the diameter of the outer wall of the complete cylinder formed by the plurality of arc-shaped blades. When the limiting cylinder is raised to its highest point along the axial direction, its upper end face is not lower than the lower end face of the arc-shaped blades. When the limiting cylinder is lowered to its lowest point along the axial direction, its upper end face is not higher than the lower end face of the arc-shaped blades.

[0009] Furthermore, the first base is provided with an annular groove that accommodates and guides the limiting cylinder to move axially. The annular groove is coaxial with the main shaft, and the limiting cylinder moves up and down axially under the guidance of the annular groove.

[0010] Preferably, the marine propulsion-generator further includes an energy storage device for storing the electrical energy generated by the generator.

[0011] Preferably, the marine propulsion-generator further includes an upper top plate disposed above the main shaft and each of the arc-shaped blades, the upper top plate being fixedly connected to the main shaft and rotatably connected to the blade shaft of each of the arc-shaped blades.

[0012] Preferably, the generator and the drive motor are the same device.

[0013] This application also provides a marine propulsion-power generation system through embodiments, including: two wind farm control devices and one of the aforementioned marine propulsion-power generation devices; the two wind farm control devices and the marine propulsion-power generation device are arranged non-collinearly; each wind farm control device includes a second base and at least two airfoil blades disposed on the second base; the second base is disposed above the first base and rotatably connected to the first base, the airfoil blades are disposed above the second base and rotatably connected to the second base through their blade shafts, and the blade shafts of the airfoil blades are parallel to the main shaft.

[0014] This application also provides a control method for a marine propulsion-generator system, used to control the aforementioned marine propulsion-generator system, including the following operations:

[0015] When a ship equipped with the marine propulsion-generator system is in a sailing state, the various arc-shaped blades of the marine propulsion-generator device are arranged into a complete cylinder, and the cylinder is driven to rotate by the drive motor.

[0016] When the vessel equipped with the marine booster-generator system is in a moored state, the arc-shaped blades of the marine booster-generator are fixedly connected to the main shaft, and the two wind field control devices are adjusted to convergence mode.

[0017] Preferably, when the two wind field control devices are in convergence mode, the airfoil blades of each wind field control device are connected to the ground in a front-to-back manner to form an arc-shaped sail, and the two arc-shaped sails are arranged in a mirror image symmetrically on the windward side of the marine booster-generator.

[0018] Preferably, when the two wind field control devices are in convergence mode, the wind duct formed by the two arc-shaped sails gradually expands along the wind direction, and the shape of the arc-shaped sails is set so that there is a maximum wind speed point at the rear opening of the wind duct.

[0019] Preferably, the control method for the marine propulsion-generator system further includes the following operations:

[0020] When a vessel equipped with the marine booster-generator system is in a sailing state, the direction of the second base and airfoil blades of the wind field control device is adjusted so that the wind field control device is in any one of the lift-type booster mode, drag-type booster mode, or wind-avoidance mode.

[0021] Preferably, when the wind field control device is in lift-type boost mode, the leading edge of each airfoil blade faces the direction of the incoming wind, and its angle of attack gradually increases;

[0022] When the wind field control device is in drag-type boost mode, the angle between the orientation of each airfoil blade and the wind direction is greater than 85°.

[0023] When the wind field control device is in wind-avoidance mode, the angle between the orientation of each airfoil blade and the wind direction is less than 5°.

[0024] The marine propulsion-generating device provided in this application combines a traditional rotary sail with a vertical axis wind turbine, offering a novel marine propulsion solution. It not only utilizes wind power to provide propulsion during ship movement, thereby saving fuel, reducing carbon emissions, and lowering operating costs, but also captures wind energy through the vertical axis wind turbine, converting it into electricity to provide a stable and reliable power supply for various onboard facilities and equipment. This multifunctional wind energy utilization system not only achieves the goals of energy conservation and emission reduction but also enhances the sustainability and environmental friendliness of ships. Attached Figure Description

[0025] Figure 1a This is a three-dimensional structural diagram of a marine propulsion-generation device in propulsion mode according to an embodiment of this application.

[0026] Figure 1b This is a schematic diagram illustrating the principle of the Magnus effect used to propel ships.

[0027] Figure 2 This is a three-dimensional structural diagram of a marine propulsion-generating device in power generation mode according to an embodiment of this application.

[0028] Figure 3 A side view of a marine propulsion-generator device provided according to an embodiment of this application;

[0029] Figure 4 This is a schematic diagram of the structure of the first base provided according to an embodiment of this application;

[0030] Figure 5 This is a schematic diagram showing the arrangement of the main shaft, bearing, arc-shaped blade shaft, and limiting cylinder in an embodiment of this application;

[0031] Figure 6 A top view of the marine booster-generator provided according to an embodiment of this application in booster mode;

[0032] Figure 7 A top view of the marine propulsion-generator device provided according to an embodiment of this application in power generation mode;

[0033] Figure 8 This is a three-dimensional structural diagram of a marine propulsion-power generation system provided according to an embodiment of this application;

[0034] Figure 9 This is a top view of the marine propulsion-generator system provided according to an embodiment of this application when it is used for power generation;

[0035] Figure 10 This is a top view of the marine propulsion-generator system provided according to an embodiment of this application when it is used for power generation;

[0036] Figure 11 A vortex cloud diagram for a marine propulsion-generator system used for power generation according to an embodiment of this application;

[0037] Figure 12 This is a flow field velocity distribution diagram of a marine booster-generator system used for power generation according to an embodiment of this application;

[0038] Figure 13 A vortex cloud diagram for a marine propulsion-generator system used for power generation according to an embodiment of this application;

[0039] Figure 14 This is a flow field velocity distribution diagram of a marine booster-generator system used for power generation according to an embodiment of this application;

[0040] Figure 15 This is a schematic diagram comparing the flow velocities of a marine propulsion-generator system with different opening modes according to an embodiment of this application.

[0041] Figure 16 This is a top view of the wind field control device provided according to the embodiments of this application when it is in lift-type booster mode;

[0042] Figure 17 This is a schematic diagram of the force analysis of the airfoil blade in an embodiment of this application;

[0043] Figure 18 This is a vortex cloud diagram of the wind field control device provided in the embodiments of this application when it is in the lift-type boost mode in a variable configuration.

[0044] Figure 19 This is a schematic diagram showing the relationship between thrust, angle of attack, and angle of attack of the wind field control device provided according to the embodiments of this application;

[0045] Figure 20 This is a vortex cloud diagram of the wind field control device provided in the embodiments of this application when it is in lift-type boost mode;

[0046] Figure 21 This is a top view of the wind field control device provided according to the embodiments of this application when it is in drag-type boost mode;

[0047] Figure 22 This is a top view of the wind field control device provided according to the embodiments of this application when it is in wind-avoidance mode.

[0048] Numbers in the diagram

[0049] First base 1, bearing seat 11, annular groove 12, through hole 13, limiting cylinder 14, top plate 15, bearing 2, inner ring 21, outer ring 22, main shaft 3, arc-shaped blade 4, blade shaft 41, side 42, generator 5, generator shaft 51, coupling 52, generator bracket 53, marine propulsion-generator 700, wind farm control device 800, airfoil blade 801, blade shaft 802, second base 803, deck 9. Detailed Implementation

[0050] The present application will now be further described based on preferred embodiments and with reference to the accompanying drawings.

[0051] Furthermore, for ease of understanding, various components on the drawings have been enlarged or reduced, but this is not intended to limit the scope of protection of this application.

[0052] In the description of the embodiments of this application, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, in the description of this application, in order to distinguish different units, the terms "first," "second," etc. are used in this specification, but these are not limited by the manufacturing order, nor should they be construed as indicating or implying relative importance. Their names may differ in the detailed description and claims of this application.

[0053] The vocabulary used in this specification is for illustrative purposes and is not intended to limit the scope of this application. It should also be noted that, unless otherwise expressly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a direct connection, or an indirect connection via an intermediate medium; or they can refer to the internal communication between two components. Those skilled in the art will understand the specific meaning of these terms in this application.

[0054] Embodiments of this application provide a marine propulsion-generator 700, which is installed on the deck of vessels such as container ships and oil tankers. Figure 1a and Figure 2 The diagrams show the three-dimensional structure of the device in its booster mode and its three-dimensional structure in its power generation mode. Figure 3 A side view of it installed on deck 9 of the ship is shown.

[0055] As shown in the figure, the ship's propulsion-generator 700 includes a main shaft 3, several arc-shaped blades 4, a generator 5, and a drive motor (not shown in the figure). The main shaft 3 is rotatably connected to the ship's deck 9. The blade shafts 41 of each arc-shaped blade 4 are parallel to the main shaft 3 and are evenly distributed around the main shaft 3. For example... Figure 1a As shown, each arc-shaped blade 4 can rotate around its respective blade axis 41 to form a complete cylinder. When the ship is sailing, this cylinder can actively rotate relative to the ship's deck 9 under the drive of a drive motor. This rotation will form a cylinder as shown in the diagram. Figure 1b The Magnus effect, as shown, provides a boost to a ship in motion; such as Figure 2As shown, each arc-shaped blade 4 can also rotate around its respective blade axis 41 to a state of fixed connection with the main shaft 3. When the ship is docked in port or anchored, after adjusting the arc-shaped blades 4 to be fixedly connected with the main shaft 3, it can serve as a drag-type vertical axis power generation device, using wind power to provide electricity for various equipment on the ship. Among them, such as Figure 3 As shown, the generator 5 is fixedly installed below the deck 9 by the generator bracket 53, and the generator shaft 51 is fixedly connected to the main shaft 3 by the coupling 52.

[0056] Figure 1a and Figure 2 In the illustrated embodiment, there are 3 arc-shaped blades. It should be understood that in some other embodiments, 2, 4 or more arc-shaped blades 4 may be provided depending on the specific needs of boosting and power generation.

[0057] The revolution of each arc-shaped blade 4 relative to the main shaft 3 and the rotation of its own blade shaft 41 can be achieved through the first base 1 and the matching bearing 2. Figure 4 The diagram shows a schematic representation of the structure of the first base 1 in the marine booster-generator 700 in some preferred embodiments. Figure 5 A schematic diagram showing the arrangement of the main shaft 3, bearing 2, and blade shaft 41 of the arc-shaped blade 4 is provided. Figure 4 and Figure 5 As shown, a bearing seat 11 is formed by a protrusion in the central area of ​​the upper surface of the first base 1. The outer circumferential surface of the bearing seat 11 is coaxial with the main shaft 3, and its center has a through hole 13 for the main shaft 3 to pass through. The bearing 2 is coaxially fitted onto the bearing seat 11 of the first base 1 with the main shaft 3. Its inner ring 21 can be fixedly connected to the bearing seat 11 with an interference fit. The blade shafts 41 of each arc-shaped blade 4 are fixedly connected to the upper end of the outer ring 22 of the bearing 2 and are evenly distributed circumferentially. In this way, when the outer ring 22 of the bearing 2 rotates relative to the inner ring 21, each blade shaft 41 will drive the arc-shaped blade 4 to revolve around the main shaft 3, and at the same time, each arc-shaped blade 4 can also rotate around its own blade shaft 41.

[0058] Furthermore, such as Figure 4 and Figure 5 As shown, an annular groove 12 is also provided on the first base 1. The annular groove 12 is coaxial with the main shaft 3. The groove can accommodate a liftable limiting cylinder 14 that is coaxial with the main shaft 3, and the limiting cylinder 14 can be raised and lowered along the axial direction under its guidance.

[0059] The diameter of the inner wall of the limiting cylinder 14 is equal to the diameter of the outer wall of the complete cylinder formed by the various arc-shaped blades 4. When the limiting cylinder 14 rises axially to the highest point, its upper end face is not lower than the lower end face of the arc-shaped blades 4, thereby restricting the rotation of each arc-shaped blade 4 and keeping it in the shape of a Magnus cylinder. When the limiting cylinder 14 descends axially to the lowest point, its upper end face is not higher than the lower end face of the arc-shaped blades 4, so that the arc-shaped blades 4 can rotate around their own blade axis 41 until they are fixedly connected to the main shaft 3.

[0060] Figure 6 This is a top view of the marine propulsion-generator 700 in power generation mode according to an embodiment of this application. Figure 7 The figure shows a top view of the marine booster-generator 700 in booster mode according to an embodiment of this application. In some preferred embodiments, the two sides 42 of each arc-shaped blade 4 along the circumference can be set as arc-shaped surfaces that match the cylindrical surface of the main shaft 3. When the arc-shaped blade 4 rotates to contact the main shaft 3, the contact surfaces of the two can match each other. At this time, the main shaft 3 and the arc-shaped blade 4 can be fixedly connected by snap-fit, pin-fit, bolt connection or other means. When the arc-shaped blade 4 is driven to rotate by wind force, it can drive the main shaft 3 and the shaft of the generator 5 to rotate, thereby realizing wind power generation.

[0061] In some preferred embodiments, the booster-generator 700 is further provided with a battery or other energy storage device for storing the electrical energy generated by the generator.

[0062] like Figure 1a As shown, in some preferred embodiments, an upper top plate 15 is provided above the main shaft 3 and each arc-shaped blade 4. The upper top plate 15 is fixedly connected to the main shaft 3 and rotatably connected to the blade shaft 41 of each arc-shaped blade 4.

[0063] Through the upper plate 15, the main shaft 3 and each arc-shaped blade 4 can achieve bidirectional drive. That is, when the booster-generator 700 is in the power generation state, the arc-shaped blades 4 can drive the main shaft 3 to rotate; when the booster-generator 700 is in the boost state, the main shaft 3 can drive the Magnus cylinder formed by the arc-shaped blades 4 to rotate. Obviously, when this bidirectional drive method is adopted, the generator 5 and the drive motor are the same device. For example, a permanent magnet motor, which is currently widely used in the field of electric vehicles, can be used. It can switch between acceleration mode and kinetic energy recovery mode, that is, it can be used as a drive motor in the boost state and as a generator in the power generation state.

[0064] When the marine booster-generator 700 generates electricity while the ship is moored, if the wind is weak, the various arc-shaped blades 4 may fail to start or rotate at low speeds, resulting in insufficient power output. Therefore, in some preferred embodiments of this application, the power generation capacity of the device is increased by converging and regulating the wind flow passing through the marine booster-generator 700.

[0065] Figure 8 A schematic diagram of a marine booster-generator system according to some preferred embodiments of this application is shown. Figure 9 and Figure 10 Top views of it during power generation are shown, such as Figures 8 to 10 As shown, the marine booster-generator system includes two wind farm control devices 800 that are not colinearly arranged, and one of the aforementioned marine booster-generator devices 700.

[0066] Furthermore, each wind farm control device 800 includes a second base 803 and at least two airfoil blades 801 disposed on the second base 803. Figures 8 to 10 In the illustrated embodiment, each wind farm control device 800 includes 3 airfoil blades. In some other embodiments, the number of airfoil blades may be 2, 4, 5, etc.

[0067] The second base 803 is disposed above the first base 1 and rotatably connected to the first base 1. The airfoil 801 is disposed above the second base 803 and rotatably connected to the second base 803 through its blade shaft 802. Meanwhile, the blade shafts 802 of the airfoil 801 are all parallel to the main shaft 3.

[0068] When power generation is required via the marine booster-generator 700, the first base 1 and the second base 803 can be rotated, and the direction of each airfoil 801 can be adjusted so that the airfoil 801 of each wind field control device 800 forms an arc-shaped sail with the front and rear airfoils touching the ground. The two arc-shaped sails are then mirror-symmetrically positioned on the windward side of the marine booster-generator 700. In this application, the model of the mirror-symmetrical arc-shaped sails formed by the two wind field control devices 800 is called the convergence mode. The convergence mode can significantly increase the wind speed flowing towards the marine booster-generator 700, thereby effectively improving the power generation efficiency.

[0069] Figure 9 and Figure 10 The two configurations of the wind field control device 800 in convergence mode are shown respectively. The difference between the two configurations lies in the direction of the opening: Figure 9 The wind tunnel formed by the two curved sails gradually narrows along the wind direction (in this application, this method is referred to as the front-opening method). Figure 10The wind tunnel formed by the two curved sails gradually increases in size along the wind direction (in this application, this method is referred to as the rear opening method).

[0070] Figure 11 , Figure 12 The flow field and velocity characteristics of the front-opening configuration are shown. Figure 13 , Figure 14 The flow field and velocity characteristics of the rear-opening configuration are shown. Figure 15 The wind speed changes under the two conditions were compared. Figures 11 to 15 As can be seen, although the front opening method is similar to the general use of a fairing with a diameter that decreases from large to small, its maximum wind speed is located far behind the wind duct. In order to obtain a better flow-gathering effect, the distance between the marine booster-generator 700 and the wind field control device 800 needs to be significantly increased. In the rear opening method, the maximum wind speed appears inside the wind duct, and its maximum value is greater than that of the front opening method. The calculation results show that the wind speed at the rotating cylinder can be increased by more than three times compared with the case where no flow-gathering channel is set, which demonstrates good flow-gathering ability and helps to shorten the deployment distance.

[0071] This application also provides a control method for a marine propulsion-generator system through embodiments, the method including the following operations:

[0072] (1) When the ship equipped with the marine boost-generator system is in a sailing state, the various arc-shaped blades of the marine boost-generator device are arranged into a complete cylinder, and the cylinder is driven to rotate by the drive motor.

[0073] (2) When the ship equipped with the marine booster-generator system is in a moored state, each arc-shaped blade of the marine booster-generator is fixedly connected to the main shaft, and the two wind field control devices are adjusted to convergence mode.

[0074] In some preferred embodiments, when the two wind field control devices 800 are in convergence mode, the airfoil blades 801 of each wind field control device 800 are connected to the ground front and rear to form an arc-shaped sail, and the two arc-shaped sails are mirror-symmetrically arranged on the windward side of the marine booster-generator 700.

[0075] In some preferred embodiments, when the two wind field control devices 800 are in convergence mode, the wind duct formed by the two arc-shaped sails gradually expands along the wind direction, and the shape of the arc-shaped sails is set so that there is a maximum wind speed point at the rear opening of the wind duct.

[0076] In addition to concentrating the current for power generation of the marine booster-generator 700 when the ship is moored, the wind farm control device 800 can also provide additional boost when the ship is sailing. Specifically, the control method of this marine booster-generator system can be further optimized by adopting the following operating steps:

[0077] (3) When the ship equipped with the marine boost-generator system is in a sailing state, adjust the direction of the second base and airfoil blade of the wind field control device so that the wind field control device is in any one of the lift boost mode, drag boost mode or wind avoidance mode.

[0078] Figures 16 to 18 The figures illustrate the states of the wind field control device 800 in lift-type boost mode, drag-type boost mode, and shelter mode. As shown, when the wind field control device 800 is in lift-type boost mode, the leading edges of each airfoil 801 face the oncoming wind direction, and their angle of attack gradually increases. Each airfoil 801 forms an arc-shaped sail, which utilizes the pressure difference between the upper and lower surfaces of the airflow to achieve a lift effect, thus propelling the ship. When the wind field control device 800 is in drag-type boost mode, its leading edges... When the angle between the orientation of the airfoil blades 801 and the absolute wind direction (i.e., the wind direction in the geodetic coordinate system) is greater than 85°, the two are in a state of being or basically perpendicular to each other. At this time, the incoming wind directly pushes each airfoil blade 801, generating a thrust on the ship. When the wind field control device 800 is in the wind avoidance mode, the angle between the orientation of each airfoil blade 801 and the absolute wind direction is less than 5°, that is, the two are in a state of being or basically parallel to each other. At this time, by adjusting the airfoil blades 801 to be basically consistent with the wind direction, the incoming wind is avoided from generating resistance on the ship.

[0079] The selection of the above three modes needs to take into account both the ship's heading and the absolute wind direction. For example, in some preferred embodiments, when the angle between the absolute wind direction and the ship's heading is less than 25°, the wind field control device 800 can be adjusted to a drag-type boost mode; when the angle between the absolute wind direction and the ship's heading is between 25° and 120°, the wind field control device 800 can be adjusted to a lift-type boost mode; and when the angle between the absolute wind direction and the ship's heading is greater than 120°, the wind field control device 800 can be adjusted to a wind-avoidance mode.

[0080] Figure 19 This diagram illustrates the force distribution of the three airfoil blades in a lift-boost mode under lateral wind conditions (i.e., when the angle between the absolute wind direction and the ship's heading is between 25° and 120°). The positive Y-axis represents the ship's heading, and the wind blows from port to starboard along the X-axis, meaning the absolute wind direction is the positive X-axis direction. wThe absolute wind speed is Vs. Simultaneously, due to the ship's movement, a relative wind direction is generated along the negative Y-axis, with a relative wind speed consistent with the ship's speed Vs. The combined effect of these two factors produces the resultant wind speed Vs shown in the diagram. r This force acts on the airfoil blades, causing the combined drag on the three airfoil blades to be F. d Under this action, the three airfoil blades will be subjected to a combined lift force F. l This, in turn, generates thrust in the ship's heading. Specifically, F in the diagram... d1 F d2 F d3 These are the drag generated by the three airfoils, F. l1 F l2 F l3 These represent the lift generated by each of the three airfoils.

[0081] The angle of attack α for each airfoil in the figure is its leading edge orientation and the drag vector F it experiences. d The angle between the mirror vectors, such as Figure 19 As shown, in this case, in order to efficiently utilize the crosswind to propel the ship, the three airfoil blades can be adjusted to form a lift-type propulsion mode as follows: the three airfoil blades are arranged sequentially along the direction of the wind, and the angle of attack α of the three airfoil blades increases sequentially.

[0082] In some preferred embodiments, the three airfoils are arranged in a lift-boosting configuration as follows: the angle of attack α of the middle airfoil ranges from 18° to 40°, and the angle between the orientations of the two outer airfoils and the middle airfoil is 5° to 15°. Figure 20 The figure shows a vorticity cloud map of the wind field when the angle of attack α of the middle airfoil is 18° in a specific embodiment. As shown in the figure, by optimizing the angle of the airfoil, the flow state of the incoming wind on the airfoil can be significantly optimized, thereby effectively utilizing the incoming wind to propel the ship.

[0083] Furthermore, when the ratio of absolute wind speed to ship speed is greater than 10, the thrust generated by the airfoil blades on the ship in its heading can be expressed as follows:

[0084] F t =F l sinβ-F d cosβ,

[0085] Where β is the angle of attack, such as Figure 14 As shown, the angle of attack β is the ship's heading (i.e., the positive direction of the Y-axis) and the resultant wind speed V. r The angle between the mirror vectors.

[0086] For cases where the absolute wind speed is much greater than the flight speed, the angle of attack of the airfoil blades can be further optimized. Specifically, in some preferred embodiments, if the angle of attack β ≤ 90°, then when the three airfoils form a lift-boost mode, the angle of attack α of the middle airfoil blade is in the range of 24° to 26°. If the angle of attack β > 90°, then when the three airfoils form a lift-boost mode, the angle of attack α of the middle airfoil blade is in the range of 37° to 39°.

[0087] Figure 21 The diagram shows the thrust variation of a ship when the three airfoils form a lift-type thrust mode, with the middle airfoil using different combinations of angle of attack and angle of attack. The curves from bottom to top represent the thrust variation with angle of attack when the angle of attack β is from 60° to 120°.

[0088] pass Figure 21 It can be observed that the thrust changes with the angle of attack in different trends at different angles of attack. Specifically, when the angle of attack β≤90°, the thrust first increases and then decreases with the increase of the angle of attack, with the angle of attack at which a large thrust is generated is about 25°. At this time, the thrust is mainly generated by the lift produced by the airfoil. However, as the angle of attack continues to increase, when the angle of attack β>90°, the thrust gradually increases with the increase of the angle of attack, with the angle of attack at which a large thrust is generated is about 38°. At this time, in addition to the lift generated by the airfoil, the drag experienced by the airfoil will also generate thrust.

[0089] Figure 22 This shows the vorticity cloud diagram when the angle of attack of the middle airfoil is set to 38°, with an angle of attack β > 90°. Figure 22 It can be seen that by reasonably setting the angle of attack of each airfoil blade, the thrust effect on the ship can be significantly improved.

[0090] The specific embodiments of this application have been described in detail above. For those skilled in the art, several improvements and modifications can be made to this application without departing from the principle of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A control method for a marine propulsion-generator system, used to control the marine propulsion-generator system, characterized in that, The marine propulsion-power generation system includes two wind farm control devices and one marine propulsion-power generation device. The marine propulsion-generator includes a main shaft, several arc-shaped blades, a generator, a drive motor, a first base, and bearings. The main shaft is rotatably connected to the ship. The blade axes of the several arc-shaped blades are all parallel to the main shaft and are distributed at equal intervals around the main shaft. The several arc-shaped blades can be rotated around their respective blade axes to form a complete cylinder, and can be rotated around their respective blade axes to be fixedly connected to the main shaft. The rotating shaft of the generator is fixedly connected to the main shaft. The drive motor is used to drive the cylinder to rotate around the main shaft. The main shaft passes through the first base and is rotatably connected to the first base. The bearing is coaxially sleeved on the first base with the main shaft, and the inner ring of the bearing is fixedly connected to the bearing seat on the first base. The blade axis of each arc-shaped blade is fixedly connected to the upper end of the outer ring of the bearing. The two wind farm control devices are arranged non-coaxially with the marine booster-generator; each wind farm control device includes a second base and at least two airfoil blades disposed on the second base; the second base is disposed above the first base and rotatably connected to the first base, the airfoil blades are disposed above the second base and rotatably connected to the second base through their blade shafts, and the blade shafts of the airfoil blades are parallel to the main shaft; The control method includes the following operations: When a vessel equipped with the aforementioned marine propulsion-generator system is underway, the various arc-shaped blades of the marine propulsion-generator are arranged into a complete cylinder, and the cylinder is rotated by the drive motor. The orientation of the second base and airfoil blades of the wind field control device is adjusted so that the wind field control device is in any one of the following modes: lift-type propulsion mode, drag-type propulsion mode, or wind-avoidance mode. When the wind field control device is in lift-type propulsion mode, the leading edge of each airfoil blade faces the direction of the oncoming wind, and its angle of attack gradually increases. When the wind field control device is in drag-type propulsion mode, the angle between the orientation of each airfoil blade and the absolute wind direction is greater than 85°. When the wind field control device is in wind-avoidance mode, the angle between the orientation of each airfoil blade and the absolute wind direction is less than 5°. When the vessel equipped with the aforementioned marine propulsion-generator system is in a moored state, the arc-shaped blades of the marine propulsion-generator are fixedly connected to the main shaft, and the two wind farm control devices are adjusted to convergence mode. in, When the two wind field control devices are in convergence mode, the airfoil blades of each wind field control device are connected front to back to form an arc-shaped sail. The two arc-shaped sails are mirror-symmetrically arranged on the windward side of the marine booster-generator. The foremost point of the arc-shaped sails along the wind direction exceeds the foremost point of the marine booster-generator. The wind duct formed by the two arc-shaped sails gradually expands along the wind direction, and the shape of the arc-shaped sails is set so that there is a maximum wind speed point at the rear opening of the wind duct.

2. The control method for a marine propulsion-generator system according to claim 1, characterized in that, The marine propulsion-generator also includes a liftable limiting cylinder coaxially arranged with the main shaft, wherein the diameter of the inner wall of the limiting cylinder is equal to the diameter of the outer wall of the complete cylinder formed by the plurality of arc-shaped blades. When the limiting cylinder rises axially to its highest point, its upper end face is not lower than the lower end face of the arc-shaped blade, and when the limiting cylinder descends axially to its lowest point, its upper end face is not higher than the lower end face of the arc-shaped blade.

3. The control method for a marine propulsion-generator system according to claim 2, characterized in that, The first base is provided with an annular groove that accommodates and guides the limiting cylinder to move axially. The annular groove is coaxial with the main shaft, and the limiting cylinder moves up and down axially under the guidance of the annular groove.

4. The control method of the marine boost-power generation system according to claim 1, characterized by, It also includes energy storage devices for storing the electrical energy generated by the generator.

5. The control method for a marine propulsion-generator system according to claim 1, characterized in that, It also includes an upper top plate disposed above the main shaft and each of the arc-shaped blades, the upper top plate being fixedly connected to the main shaft and rotatably connected to the blade shaft of each of the arc-shaped blades.

6. The control method for a marine propulsion-generator system according to claim 5, characterized in that, The generator and the drive motor are the same device.

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