Self-powered unmanned ship based on wave energy

Abstract

The invention provides a wave energy-based self-powered unmanned ship which comprises a ship body, a cross-shaped water channel arranged in the ship body, water storage bins arranged at the four tail ends of the cross-shaped water channel, water pumping devices arranged on the outer sides of the water storage bins, a power generation device arranged at the intersection of the cross-shaped water channel and an energy storage device arranged on the ship body, the energy storage device is used for storing electric energy generated by the power generation device. According to the wave energy power generation system provided with the cross-shaped water channel, the water level difference can be generated between at least the water storage bins at the two ends of the water channel under the condition that the ship body is subjected to pitching, rolling or swinging at any angle, wave energy is utilized to the maximum degree, and power generation under the complex sea condition environment is achieved.

Description

Technical Field

[0001] This invention belongs to the field of marine propulsion technology, specifically a self-powered unmanned vessel based on wave energy. Background Technology

[0002] One of the characteristics of modern ship technology development is the adoption of electric propulsion, where dedicated ship generators power electric motors to drive the propellers, while other ship generators supply power to service loads. A major trend in future ship technology development will be the replacement of more non-electrical equipment on board with electrical equipment. When ships sail at sea, significant energy consumption is unavoidable, and recharging is difficult.

[0003] Currently, there are basically three types of mature wave power generation devices.

[0004] 1. Oscillating Water Column Type: This type utilizes a fixed-volume container connected to the seawater. Waves cause changes in the water's surface position, which in turn changes the volume of air inside the container, compressing the air (intermediate medium). This compressed air drives an impeller, which in turn powers a generator. Because the container requires a large space, it is typically built on breakwaters or in ports, and can also serve as a sidewall, reducing construction costs.

[0005] 2. Mechanical type: The mechanical type uses the motion of waves to drive the moving parts of the device to compress (drive) intermediate media such as oil and water, which in turn drive the power generation device to generate electricity. Because the device requires a large space and contains a large number of moving parts such as hinges, pistons, and gears, it has been damaged by long-term exposure to the strong winds, waves, and salt spray corrosion environment of the deep sea. It is generally built near the shore to facilitate the replacement of mechanical parts.

[0006] 3. Flow type: The flow type uses a narrow channel to introduce waves into a high-level reservoir to form a water level difference, i.e., water head. The water head is used to directly drive the turbine generator set to generate electricity. It is generally built near the reservoir.

[0007] The three wave power generation devices described above are limited to locations near the coastline and cannot be used for ships sailing far from the coast. Summary of the Invention

[0008] This invention proposes a self-powered unmanned surface vessel based on wave energy.

[0009] The technical solution to achieve the purpose of this invention is as follows: a self-powered unmanned vessel based on wave energy, comprising: a hull, a cross-shaped waterway disposed inside the hull, water storage tanks disposed at the four ends of the cross-shaped waterway, a pumping device disposed outside the water storage tanks, a power generation device disposed at the intersection of the cross-shaped waterway, and an energy storage device disposed on the hull, wherein the energy storage device is used to store the electrical energy generated by the power generation device.

[0010] Preferably, the power generation device includes a turbine rotor, a doubly-fed generator, a transformer, and a rectifier. The turbine rotor rotates in response to the impact of water flow from any direction in the cross-shaped waterway. The doubly-fed generator generates electricity in response to the rotation of the turbine rotor. The generated alternating current is converted into direct current by the transformer and then by the rectifier before being finally output to the energy storage device.

[0011] Preferably, the turbine rotor is equipped with turbine blades on its circular surface. When water flows from a direction perpendicular to the circular surface and impacts the turbine blades, the turbine blades rotate, thereby causing the entire moving turbine rotor to rotate. The side of the turbine rotor has a groove-shaped structure. When water flows from a direction parallel to the circular surface and impacts the groove-shaped structure on the side, it will also cause the entire moving turbine rotor to rotate.

[0012] Preferably, the side groove structure of the turbine rotor specifically includes 36 grooves arranged perpendicular to the cylindrical wall.

[0013] Preferably, the turbine blades on the circular surface of the turbine rotor are 9 curved blades with an incident angle of 15°, an average blade angle of 45°, and a centrally symmetrical design.

[0014] Compared with the prior art, the significant advantages of this invention are:

[0015] 1. Ships can generate electricity using wave energy when far from the coast: Ships' demand for electricity is constantly increasing, but currently, wave power generation is mostly limited to areas near the coastline. When ships sail far from the coastline, it is difficult to extract and utilize wave energy in the ocean, leading to difficulties in replenishing power. This invention provides a wave energy generation system installed inside the ship's hull, enabling ships sailing at sea to convert wave energy into electrical energy for charging, thus solving the above problems to some extent.

[0016] 2. When a ship is in a complex sea state and rolling environment, waves may impact the hull from any angle. This invention provides a wave energy power generation system with a cross-shaped waterway, which enables the waterway to generate a water level difference at at least two ends of the water tank when the ship is pitching, rolling, or swaying at any angle, thereby maximizing the utilization of wave energy and realizing power generation in complex sea state environments.

[0017] 3. The turbine rotor of the present invention has a side groove structure with 36 grooved blades arranged perpendicular to the cylindrical wall to ensure good driving efficiency of water flow in both directions; the circular turbine blades have 9 curved blades with an incident angle of 15° and an average blade angle of 45°. The design is centrally symmetrical, so there is no difference between clockwise and counterclockwise rotation of the turbine. Water flow in both directions can drive the turbine to rotate, and the cost is low.

[0018] 4. The turbine rotor slots of this invention are subjected to tangential force, resulting in high efficiency; the turbine blades are subjected to axial force, resulting in moderate efficiency. Considering that the pitch amplitude of the unmanned vessel is greater than the roll amplitude in most cases, the slots are matched with the pitch channel with higher energy, and the turbine blades are matched with the roll channel with lower energy, further improving the power generation efficiency.

[0019] The present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the external structure of the unmanned vessel according to an embodiment of the present invention.

[0021] Figure 2 This is a schematic diagram of the internal structure of the unmanned vessel according to an embodiment of the present invention.

[0022] Figure 3 This is a schematic diagram of the cross-shaped waterway structure in the unmanned vessel wave energy power generation system according to an embodiment of the present invention.

[0023] Figure 4 This is a schematic diagram of the turbine rotor structure in the unmanned ship wave energy power generation system according to an embodiment of the present invention.

[0024] Figure 5 This is a schematic diagram of the circular turbine blade structure of the turbine rotor in the unmanned ship wave energy power generation system of this invention.

[0025] Figure 6 This is a schematic diagram illustrating the principle of the power generation device to the energy storage device in the unmanned vessel wave energy power generation system according to an embodiment of the present invention.

[0026] Among them, 1: hull; 2: pumping device; 3: water storage tank; 4: cross channel; 5: turbine rotor; 6: doubly fed generator; 7: transformer; 8: rectifier; 9: energy storage device. Detailed Implementation

[0027] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0028] In the description of this invention, the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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. Therefore, they should not be construed as limiting this invention.

[0029] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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 or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0030] The external dimension information of the unmanned hull (1) provided in this embodiment is as follows: Figure 1 As shown.

[0031] like Figure 2 As shown, the surface of the unmanned hull (1) provided in this embodiment has a water inlet, which is connected to the internal water storage tank (3) through a pumping device (2). The water storage tanks are connected to each other through a cross waterway (4), and a turbine rotor (5) is installed at the intersection of the cross waterway (4).

[0032] like Figure 3 As shown, the cross-shaped waterway (4) in the unmanned vessel wave energy power generation system provided in this embodiment is shaped like a cross when viewed from above. A water storage tank (3) is installed at each of the four ends of the cross-shaped waterway. The water storage tanks are connected to the outside of the hull through a pumping device (2). A turbine rotor (5) is installed in the middle of the cross-shaped waterway. The length of the cross-shaped waterway (4), the length and depth of the water storage tanks (3) are shown in the figure.

[0033] like Figure 6 As shown, the power generation device in the unmanned ship wave energy power generation system provided in this embodiment includes a turbine rotor (5), a doubly fed generator (6), a transformer (7), and a rectifier (8). The turbine rotor (5) can rotate when impacted by water flow from any of the four directions in the cross waterway. The doubly fed generator (6) can generate electricity stably whether the turbine rotor rotates forward or reverse. The generated AC power is converted into DC power by the transformer (7) and then by the rectifier (8) and finally output to the energy storage device (6).

[0034] like Figure 4 As shown, the turbine rotor (5) in the unmanned vessel wave energy power generation system provided in this embodiment has a side groove structure with 36 grooves arranged perpendicular to the cylindrical wall to ensure that the water flow in both directions has good driving efficiency. The grooves are subjected to tangential force, resulting in high efficiency and matching the longitudinal sway channel with large energy. The circular turbine blades are made of 9 curved blades and are completely symmetrical. There is no difference between clockwise and counterclockwise rotation of the turbine. The turbine blades are subjected to axial force, resulting in moderate efficiency and matching the transverse sway channel with less energy.

[0035] like Figure 5As shown, the turbine rotor (5) of the unmanned ship wave energy power generation system provided in this embodiment has 9 curved blades with an incident angle of 15° and an average blade angle of 45°. It is centrally symmetrically designed, and the turbine rotation has no difference between clockwise and counterclockwise. Water flow in both directions can drive the turbine to rotate.

[0036] In a further embodiment, the longitudinal sway channel of the cross channel 4 is 0.618 times the length of the hull (1), and its width is less than 1 / 10 of the width of the hull 1, but greater than the sum of the widths of all turbine blades.

[0037] In a further embodiment, the length of the roll channel of the cross channel 4 is 0.618 times the width of the hull 1, the width is less than 1 / 10 of the width of the hull 1, and greater than the set length of the turbine blade diameter.

[0038] As one embodiment, the unmanned vessel has a length of 11 meters, a width of 3.17 meters, and an overall height of 2.57 meters. The designed cross-shaped waterway has a longitudinal length of 6 meters, a width of 0.25 meters, and a depth of 0.2 meters along the hull. The transverse length of the cross-shaped waterway is 1.6 meters, a width of 0.85 meters, and a depth of 0.25 meters.

[0039] The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and to design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A self-powered unmanned surface vessel based on wave energy, characterized in that, include: The ship has a hull (1), a cross-shaped waterway (4) inside the hull, a water storage tank (3) at the four ends of the cross-shaped waterway (4), a pumping device (2) outside the water storage tank (3), a power generation device (5) at the intersection of the cross-shaped waterway, and an energy storage device (9) on the hull (1), wherein the energy storage device (9) is used to store the electrical energy generated by the power generation device (5).

2. The wave energy-based self-powered unmanned surface vessel according to claim 1, characterized in that, The power generation device includes a turbine rotor (5), a doubly fed generator (6), a transformer (7), and a rectifier (8). The turbine rotor (5) rotates in response to the impact of water flow from any direction in the cross-shaped waterway. The doubly fed generator (6) generates electricity in response to the rotation of the turbine rotor. The generated AC power is converted into DC power by the transformer (7) and then by the rectifier (8) and finally output to the energy storage device (9).

3. The wave energy-based self-powered unmanned surface vessel according to claim 2, characterized in that, The turbine rotor (5) has turbine blades mounted on its circular surface. When the water flow impacts the turbine blades from a direction perpendicular to the circular surface, the turbine blades rotate, thereby causing the entire moving turbine rotor (5) to rotate. The side of the turbine rotor (5) has a groove structure. When the water flow impacts the side groove structure from a direction parallel to the circular surface, it will also cause the entire moving turbine rotor (5) to rotate.

4. The wave energy-based self-powered unmanned surface vessel according to claim 3, characterized in that, The side groove structure of the turbine rotor (5) specifically includes 36 grooves arranged perpendicular to the cylindrical wall.

5. The wave energy-based self-powered unmanned surface vessel according to claim 3, characterized in that, The turbine rotor (5) has 9 curved blades on a circular surface, with an incident angle of 15° and an average blade angle of 45°. It is designed with a central symmetry.

6. The wave energy-based self-powered unmanned surface vessel according to claim 1, characterized in that, The longitudinal sway length of the cross-shaped waterway (4) is 0.618 times the length of the hull (1), and its width is less than 1 / 10 of the width of the hull (1) but greater than the total width of all turbine blades.

7. The wave energy-based self-powered unmanned surface vessel according to claim 1, characterized in that, The length of the roll channel of the cross channel (4) is 0.618 times the width of the hull (1), the width is less than 1 / 10 of the width of the hull (1), and greater than the set length of the turbine blade diameter.

8. The wave energy-based self-powered unmanned surface vessel according to claim 1, characterized in that, The ship is 11 meters long, 3.17 meters wide, and 2.57 meters high. The cross-shaped waterway is 6 meters long, 0.25 meters wide, and 0.2 meters deep along the longitudinal direction of the ship. The cross-shaped waterway is 1.6 meters long, 0.85 meters wide, and 0.25 meters deep along the transverse direction of the ship.

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