Ship with self-cleaning propeller blades

Abstract

The present invention discloses a vessel with self-cleaning propeller blades, comprising a hull, a propeller assembly mounted at the rear of the hull, the propeller assembly comprising propeller blades and an automatic blade cleaning device, the spiral surface of the propeller blades being provided with a micro-texture and an openable cover plate, the automatic blade cleaning device being provided on the cover plate and configured to be accommodated within the propeller blades when the cover plate is closed and to be exposed on the surface of the propeller blades when the cover plate is open; wherein the automatic blade cleaning device comprises a cylinder, a retractable bracket, an elastic member, and a cleaning head; the cylinder is fixed to the inner side of the cover plate, its driving end being connected to one end of the retractable bracket, the cleaning head being provided at the other end of the retractable bracket, and the ends of the elastic member being respectively connected to the retractable bracket and the cleaning head. The present invention ensures the rotation efficiency and propulsion force of the propeller in water.

Description

Technical Field

[0001] The present invention relates to the field of ships, in particular to a ship with self-cleaning propeller blades. Background Art

[0002] Ships are a common form of water transportation, and most are currently powered by propellers. A propeller is a device that converts engine power into propulsion by rotating blades in the water. It can have two or more blades connected to a hub, with the rearward-facing surface of the blades forming a helical surface or something similar to a helical surface.

[0003] In practice, the long-term exposure of propellers to water and their need to constantly rotate can cause large amounts of weeds and roots to become entangled in the propeller shaft. This can increase the motor's output power over time, and even hinder propeller rotation, hindering the vessel's power. Furthermore, current propeller blades are mostly smooth, resulting in low friction with water, which can affect the vessel's propulsion. Summary of the Invention

[0004] The purpose of the present invention is to provide a vessel with self-cleaning propeller blades, which ensures that the propeller will not be entangled by a large amount of aquatic plants or roots on the propeller shaft, thereby affecting the rotation of the propeller and hindering the power of the vessel. The specific solution is as follows:

[0005] A ship with self-cleaning propeller blades, comprising a hull, a propeller assembly carried at the stern of the hull, the propeller assembly comprising propeller blades and an automatic blade cleaning device, the spiral surface of the propeller blades being provided with a micro-texture and an openable and closable cover plate, the automatic blade cleaning device being provided on the cover plate and configured to be accommodated inside the propeller blades when the cover plate is closed and to be exposed on the surface of the propeller blades when the cover plate is open; wherein the automatic blade cleaning device comprises a cylinder, a retractable bracket, an elastic member and a cleaning head; the cylinder is fixed on the inner side of the cover plate, a driving end of the cylinder is connected to one end of the retractable bracket, the cleaning head is provided at the other end of the retractable bracket, and the two ends of the elastic member are respectively connected to the retractable bracket and the cleaning head.

[0006] Preferably, the cover plate is arranged on the spiral surface of the propeller blade near the shaft portion, and is configured to be in a closed state when the propeller blade rotates in a first direction, and to be in an open state when the propeller blade rotates in a second direction opposite to the first direction.

[0007] Preferably, water flow holes are provided on the surface of the cleaning head.

[0008] Preferably, the automatic blade cleaning device further comprises a cleaning head limit block fixed to the other end of the retractable bracket; and the propeller blade is provided with a cover plate limit block corresponding to the cover plate.

[0009] Preferably, the micro texture is arranged near the middle of the spiral surface of the propeller blade to increase the friction between the propeller blade and water.

[0010] Preferably, the micro texture is a microporous structure, a groove structure or a coating structure or a combination thereof.

[0011] Preferably, both sides of the hull are equipped with wing plate structures, and solar cells are installed inside the hull; the upper surface of the wing plate structure is provided with a solar panel electrically connected to the solar cell, and the solar panel converts solar energy into electrical energy and then powers the propeller assembly through the solar cell.

[0012] Preferably, the tail and rudder of the hull are made of shape memory alloy material, and are configured to be able to change the shape of the hull according to the acquired temperature and speed information to improve the propulsion efficiency and stability of the ship; the structural part of the hull adopts variable stiffness material, and is configured to be able to enhance or weaken the carrying capacity of the hull by adjusting the material stiffness.

[0013] Preferably, the propeller blades are disassembled and replaced by means of a slide rail structure in conjunction with rivets.

[0014] The present invention ensures the rotation efficiency of the propeller by arranging the self-cleaning device and the micro-texture, improves the propulsion force of the ship in the water, and enhances the navigation stability and safety of the ship. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For those skilled in the art, other relevant drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 Schematic diagram of the structure of the propeller micro-texture in the embodiment of the ship with self-cleaning propeller blades according to the present invention.

[0017] Figure 2 This is a schematic diagram of a disassembled test propeller blade in an embodiment of the ship with self-cleaning propeller blades according to the present invention.

[0018] Figure 3 This is a schematic diagram of the wing plate structure in an embodiment of a ship with self-cleaning propeller blades according to the present invention.

[0019] Figure 4 Schematic diagram of the positional relationship of the self-cleaning propeller blades in a ship embodiment of the present invention.

[0020] Figure 5 In the embodiment of the ship with self-cleaning propeller blades according to the present invention, the automatic cleaning device is located at the position of the propeller.

[0021] Figure 6 This is a structural diagram of the automatic cleaning device in an embodiment of a ship with self-cleaning propeller blades according to the present invention.

[0022] In the figure: 1-left wing solar panel; 2-left wing panel; 3-propeller blade; 4-micro texture; 5-slide rail structure; 6-rivet hole; 7-hull; 8-right wing panel; 9-right wing solar panel; 10-main solar panel; 11-motor; 12-rack; 13-cover; 14-cylinder; 15-retractable bracket; 16-cover limit block; 17-elastic part; 18-cleaning head limit block; 19-cleaning head; 20-water flow hole. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by the first technicians in this field without making creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention for which protection is sought, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by the first technicians in this field without making creative work are within the scope of protection of the present invention.

[0024] Example

[0025] The following are only preferred embodiments of the present invention. The protection scope of the present invention is not limited to the following embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention.

[0026] Reference Manual Figure 1A ship with self-cleaning propeller blades, comprising a hull 7, a propeller assembly mounted at the rear of the hull, the propeller assembly comprising a propeller blade 3 and an automatic blade cleaning device, the spiral surface of the propeller blade 3 being provided with a micro-texture 4 and an openable cover plate 13, the automatic blade cleaning device being provided on the cover plate 13 and configured to be accommodated inside the propeller blade 3 when the cover plate 13 is closed and exposed on the surface of the propeller blade 3 when the cover plate 13 is opened; wherein the automatic blade cleaning device comprises a cylinder 14, a retractable bracket 15, a cover plate limit block 16, an elastic member 17, a cleaning Head limit block 18 and cleaning head 19; the cylinder 14 is fixed on the inner side of the cover plate 13, and its driving end is connected to one end of the retractable bracket 15, and the cleaning head 19 is arranged at the other end of the retractable bracket 15, and the two ends of the elastic member 17 are respectively connected to the retractable bracket 15 and the cleaning head 19, the cleaning head limit block 18 is fixed to the other end of the retractable bracket, and the surface of the cleaning head 19 is provided with water flow holes 20 for allowing water to pass through during cleaning. The cover plate limit block 16 set on the propeller blade 3 corresponds to the cover plate 13 and is used to limit the cover plate 13.

[0027] Reference Manual Figure 1-2 The surface of the propeller blade 3 shown in the figure features a microtexture 4, which can take the form of micropores, grooves, or a coating. The arrangement of the microtexture can also be adjusted according to actual conditions. Specifically, the microtexture 4 is located near the middle of the spiral surface of the propeller blade 3. The microtexture 4 is used to enhance the friction between the propeller blade 3 and the water. Specifically, the surface of the microtexture 4 creates more microscopic contact points between the propeller blade and the water flow, increasing friction. This friction can "grab" the water flow to a certain extent, ensuring a more stable flow across the blade surface, thereby improving propulsion efficiency. It also reduces vortex formation: When the propeller blade surface is smooth, the water flow may form separate vortices on the blade surface. These vortices reduce propulsion and increase energy consumption. However, the surface of the microtexture 4 modifies the interaction between the fluid and the blade, reducing water separation and vortex formation, ensuring more stable water flow and reducing energy loss. Optimizing water flow direction: The microtexture 4 can also guide the water flow in a more appropriate direction on the propeller blade, reducing unnecessary energy waste. Through the design of the microstructure, the path of water flow on the blade surface can be changed, making the water flow more evenly and reducing the generation of eddies and turbulence.

[0028] By optimizing the design of microtexture 3, the propeller can generate greater propulsion at lower power output, thereby improving energy utilization and reducing energy loss during navigation. The design of microtexture 3 should be optimized based on the vessel's purpose and navigation environment to ensure optimal propulsion efficiency. The microtexture 4 adopts the following three design methods (i.e., three embodiments):

[0029] Microtexture 4 is a micropore design: This creates a series of tiny holes on the blade surface. This alters the way water flows, eliminating direct contact with the smooth blade surface and instead filtering and guiding it through these micropores. This increases the contact surface between the water and the blade, enhancing friction and effectively avoiding the energy waste that occurs when water flows over a large area. How it works: Micropores allow water to flow through these tiny pores or microchannels, creating more friction surfaces and increasing propulsion output. The size, distribution density, and depth of the micropores are precisely calculated and optimized through experimental experiments to increase friction without causing excessive flow resistance, thus maintaining low energy consumption. Microtexture 4 is a groove design: The groove (or furrow) design creates fine grooves on the propeller blade surface aligned with the direction of water flow. This guides water flow more steadily across the blade surface and reduces the formation of vortices. The groove design ensures a more uniform flow across the blade surface, reducing turbulence and separation. Grooves guide water flow evenly along the blade surface and redirect it, making it conform more closely to the blade surface and reducing energy loss during propulsion. The depth, width, and spacing of the grooves significantly influence propulsion efficiency. These must be continuously optimized during testing to ensure they increase propulsion without excessively increasing water resistance. Microtexture 4 is a coating design: Coating involves applying a specific material, such as a coating with high surface roughness or hydrophilicity, to the propeller blade surface to increase friction between the water and the blade surface. The coating modifies the blade's surface properties, improving water contact and propulsion efficiency. The coating's surface microtexture and material influence water contact and flow patterns. A coating with a high coefficient of friction enhances interaction with water, thereby improving propulsion efficiency. The coating's thickness, material, and surface characteristics (such as roughness) require rigorous experimental verification to ensure they enhance thrust while avoiding excessive friction losses under varying conditions.

[0030] To ensure that the microtexture can achieve optimal propulsion efficiency, the design needs to take into account the following aspects:

[0031] Combined application of multiple micro-textures 4: In actual design, multiple micro-texture designs such as micropores, grooves, and coatings can be combined. By optimizing the combination of different micro-textures, the best propulsion effect can be achieved under different water conditions. For example, when sailing at high speed, the micropore and coating design can reduce resistance, and when sailing at low speed, the groove design can increase propulsion. Adjustability of micro-texture: Taking into account the different requirements of the propulsion system in different sea conditions, the design of micro-texture can be adjusted according to actual conditions. For example, the micro-texture 4 of the propeller blade 3 can be designed to be adjustable (such as variable aperture or adjustable groove depth), and automatically adjusted through system feedback under different loads and speeds to ensure the best match between thrust and efficiency. See the attached manual Figure 2 The propeller blades 3 feature a quick-detach design, allowing crew members to install a varying number of blades based on specific needs. Specifically, the propeller blades 3 are removed and replaced via a slide rail structure 5 and rivet holes 6 (via the rivet holes). A common configuration is three to eight blades, each secured with a simple quick-connect mechanism (as shown above), using the slide rail structure 5 and rivet holes 6 for easy removal and replacement. This detachable design not only improves the vessel's adaptability but also facilitates repair and maintenance, reducing maintenance costs.

[0032] See the instructions attached Figure 3 The rack 12 on the wing meshes with the gear on the motor 11, allowing the crew to quickly adjust the extension of the left and right wing panels 2 and 8 as needed. These panels can be adjusted in real time based on sailing speed, currents, wind speed, and other conditions, optimizing the vessel's fuel efficiency and sailing performance. This design improves the vessel's sailing adaptability and ease of maintenance.

[0033] See the instructions attached Figure 4 , solar panels are installed on the deck, superstructure and other surfaces of the ship, which can maximize the use of sunlight and convert solar energy into electrical energy. The electrical energy is stored in a battery pack for use by the ship when needed. The left wing solar panel 1 and the right wing solar panel 9 can provide auxiliary power for the ship, reduce fuel consumption, and reduce carbon emissions, and are particularly suitable for use in sunny environments. Specifically, both sides of the hull 7 are equipped with a wing panel structure (left wing panel 2 and right wing panel 8), and the interior of the hull 7 is equipped with solar cells; the upper surface of the wing panel structure is provided with a left wing solar panel 1 and a right wing solar panel 9 electrically connected to the solar cell, and the left wing solar panel 1 and the right wing solar panel 9 convert solar energy into electrical energy and then power the propeller assembly through the solar cell.

[0034] See the instructions attached Figure 5The cover 13 of the automatic cleaning device is shown in the figure in a clockwise direction, representing the direction of propeller rotation during normal forward motion of the ship. The cover 13 is located near the shaft of the helical surface of the propeller blade 3 and is configured to be closed when the propeller blade 3 rotates in a first direction (clockwise) and open when the propeller blade rotates in a second direction opposite to the first direction (counterclockwise).

[0035] See the instructions attached Figure 6 , the specific operation process of the self-cleaning device is:

[0036] (1) Water flow control cover opening and closing: When the propeller rotates clockwise (pushing the hull forward), the water flow direction is from left to right. At this time, the cover 13 remains closed and the cleaning device does not work, reducing unnecessary resistance. When the propeller rotates counterclockwise (the water flow direction is from right to left), the cover automatically opens due to the change in surface flow velocity, triggering the cleaning mechanism.

[0037] (2) The cleaning head automatically opens: The cylinder 14 pushes the retractable bracket 15 outward, driving the cleaning head 19 to contact the propeller surface for cleaning. The cleaning head is connected to the retractable bracket 15 via an elastic member 17 (such as a spring). During operation, when the retractable bracket 15 is opened, the elastic member 17 is tightened, causing the cleaning head 19 to open and clean the propeller surface. As the cylinder 14 extends and retracts, the cleaning head limit block 18 and the elastic member 17 on the cleaning head interact, allowing the cleaning head 19 to clean the propeller surface.

[0038] (3) Cylinder 14 drives the cleaning action: The telescopic movement of cylinder 14 drives the entire cleaning device to move across the surface of propeller blade 3, completing the cleaning operation. The cleaning head 19 wipes and removes dirt from the propeller surface as cylinder 14 moves, maintaining the performance and efficiency of the propeller.

[0039] In this embodiment, further, the tail and rudder of the hull are made of shape memory alloy material, and are configured to be able to change the shape of the hull according to the acquired temperature and speed information, thereby improving the propulsion efficiency and stability of the ship; the structural part of the hull adopts variable stiffness material, and is configured to be able to enhance or weaken the carrying capacity of the hull by adjusting the material stiffness.

[0040] In this embodiment, an intelligent adaptive material control system, deployed onboard or on a cloud platform, combines intelligent materials with intelligent algorithms to self-regulate and optimize the ship's hull characteristics based on the vessel's navigation environment and operating conditions. By monitoring sea conditions, hull attitude, speed, pressure, and other data in real time, the system dynamically adjusts the physical properties of the ship's surface and internal materials through a feedback control mechanism, thereby optimizing navigation performance and energy efficiency.

[0041] Among them, smart materials include:

[0042] Shape memory alloys (SMAs) are used in key ship parts, such as the stern and rudders. As a ship operates at varying speeds or sea conditions, the SMA automatically changes shape based on ambient temperature, optimizing contact between the water and the hull, thereby improving propulsion efficiency and stability.

[0043] Piezoelectric materials: Used for monitoring and regulating vibrations on ship surfaces. Piezoelectric materials convert mechanical stress into electrical energy. When a ship is struck by waves, they provide electrical feedback and adjust the ship's control system to mitigate the impact of the waves.

[0044] Variable stiffness materials: Applied to ship structures, these materials adjust their stiffness to enhance or weaken the ship's load-bearing capacity. The material's stiffness automatically adjusts to real-time changes in the ship's load, currents, and other factors, maintaining optimal structural performance.

[0045] This embodiment further incorporates a real-time sensing and feedback system, utilizing a sensor network to monitor hull stress, waves, wind speed, speed, rudder angle, and other information in real time. All data is transmitted to a cloud platform via the Internet of Things (IoT). Intelligent algorithms analyze the data in real time and transmit control signals to the vessel's actuators (such as shape memory alloy rudders and piezoelectric material systems). These algorithms utilize fuzzy processing to calculate the material property changes that best suit the current sailing conditions.

[0046] For example, intelligent algorithms can use deep reinforcement learning to self-learn how to achieve optimal sailing performance through intelligent material adjustment. Based on feedback from each voyage, the system gradually optimizes material adjustment strategies to adapt to varying sea conditions and loads. For example, the automatic adjustment of shape memory alloys can reduce water resistance, thereby improving propulsion efficiency and lowering fuel consumption. This also reduces structural fatigue. By using variable-stiffness materials, the hull can adjust its stiffness according to varying loads, effectively reducing fatigue damage and extending the ship's service life.

[0047] The specific working process of the intelligent adaptive material control system is described in detail below:

[0048] 1. Real-time data collection (using the following sensors): Hull stress sensor (Strain Gauge): Like a sense of touch, it senses the force applied to key parts of the hull, with an accuracy of ±0.1 MPa; Wave sensor (Accelerometer): Like a sense of balance, it senses wave impact on the ship, with a range of ±5g and an accuracy of ±0.01g; Wind speed sensor (Ultrasonic Anemometer): Like a sense of wind, it measures wind speed, with a range of 0-50m / s and an accuracy of ±0.1m / s; Speed ​​sensor (Doppler Speed ​​Log): Like a sense of speed, it measures the ship's speed, with an accuracy of ±0.1 knots; Rudder angle sensor (Potentiometer): Like a sense of direction, it measures the rudder angle, with an accuracy of ±0.1 degrees. Data collection is performed at a frequency of 10 times per second (10Hz) to ensure real-time performance.

[0049] 2. Data Transmission and Processing: Sensor data is transmitted to the cloud platform via the MQTT protocol for preprocessing. This includes the following methods: Kalman filter noise reduction: The Kalman filter algorithm is used to eliminate noise interference in sensor data and improve data accuracy. The Kalman filter acts like a filter, removing inaccurate information. Normalization: Sensor data is scaled to a range between 0 and 1 to facilitate subsequent calculations. Normalization is like unifying different units for easier comparison. Fuzzy logic analysis: Input variables are fuzzified. Hull stress is categorized into three levels: "low," "medium," and "high." A triangular membership function is used to quantify the degree of fuzziness. For example, a stress of 50 MPa is considered "low" with a score of 0.8 and "medium" with a score of 0.2. Wave height is categorized into three levels: "small," "medium," and "large," similar to determining whether a wave is "small," "medium," or "large." Speed: Divided into three levels: "slow", "medium" and "fast"; Fuzzy rule library: The system presets a series of "if...then..." rules. For example, if the hull stress is "high", the waves are "large", and the speed is "fast", then "stronger" support is needed and the rudder angle is adjusted to the "right". These rules are a summary of expert experience and are the basis for the system to make intelligent decisions; Fuzzy reasoning: Based on the current sensor data, the corresponding fuzzy rules are activated and the "strength" of each rule is calculated.

[0050] 3. Adjust the hull state based on the processed data after feedback, including the following steps: (1) Variable stiffness material adjustment: According to the results of fuzzy reasoning, adjust the stiffness of the variable stiffness material in the hull structure. If "stronger" support is needed, the stiffness of the material is increased, otherwise it is decreased. The variable stiffness material is controlled by a hydraulic driver. The driver receives a voltage signal of 0-10V, corresponding to a stiffness range of 0-15 GPa. (2) Shape memory alloy rudder angle adjustment: Shape memory alloy can change shape according to temperature. The system changes the temperature of the shape memory alloy by controlling the heater, thereby adjusting the angle of the rudder. The heater receives a voltage signal of 0-10V, corresponding to a rudder angle range of -10 to +10 degrees.

[0051] 4. Reinforcement learning optimization is performed on data processing during navigation. Specifically, the Q-learning algorithm can be used. Using the Q-learning algorithm, the system continuously learns and optimizes fuzzy rules during actual navigation. The Q-learning algorithm optimizes the following parameters: State space: Factors such as hull stress, wave height, and speed are discretized into different levels, which serve as states for the Q-learning algorithm; Action space: Material stiffness adjustment (increase, maintain, decrease) and rudder angle adjustment (left, center, right) serve as actions for the Q-learning algorithm; Reward function: The reward function is used to evaluate the quality of each action. For example, reducing energy consumption, improving navigation stability, and reducing deviation from the course will all result in positive rewards; Q-value update: The Q-table is continuously updated based on the reward function, allowing the system to learn how to select the optimal action under different conditions.

[0052] 5. Provide navigation feedback: The system records various data of each navigation (sensor data, control parameters, energy consumption, navigation stability, etc.).

[0053] These data are used regularly to update the fuzzy rules and Q-table, enabling the system to adapt to different sea conditions and loads, and continuously improve navigation performance.

[0054] In summary, the intelligent adaptive material control system senses environmental changes through sensors, uses fuzzy logic to make decisions, controls intelligent materials to adjust hull characteristics, and continuously optimizes control strategies through reinforcement learning, ultimately achieving intelligent and efficient ships.

[0055] The above embodiments are intended only to illustrate the technical concepts and features of the present invention. Their purpose is to enable those skilled in the art to understand the contents of the present invention and implement them accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications made in accordance with the spirit of the present invention are intended to be covered by the scope of protection of the present invention.

Claims

1. A ship with self-cleaning propeller blades, comprising a hull with a propeller assembly mounted at the stern of the hull, characterized in that: The propeller assembly includes a propeller blade and an automatic blade cleaning device arranged on the spiral surface of the propeller blade near the shaft, the spiral surface of the propeller blade is provided with a micro-texture and an openable and closable cover, the automatic blade cleaning device is provided on the cover and is configured to be accommodated inside the propeller blade when the cover is closed and to be exposed on the surface of the propeller blade when the cover is opened; wherein, the automatic blade cleaning device includes a cylinder, a retractable bracket, an elastic member and a cleaning head; the automatic blade cleaning device also includes a cleaning head limit block fixed at the other end of the retractable bracket; the propeller blade is provided with a cover limit block corresponding to the cover; the cylinder is fixed on the inner side of the cover, and its driving end is connected to one end of the retractable bracket, the cleaning head is provided at the other end of the retractable bracket, and the two ends of the elastic member are respectively connected to the retractable bracket and the cleaning head; the cover is configured to be in a closed state when the propeller blade rotates along a first direction, and to be in an open state when the propeller blade rotates along a second direction opposite to the first direction.

2. The ship with self-cleaning propeller blades according to claim 1, characterized in that: The surface of the cleaning head is provided with water flow holes.

3. The ship with self-cleaning propeller blades according to claim 1, characterized in that: The micro texture is arranged near the middle of the spiral surface of the propeller blade to increase the friction between the propeller blade and water.

4. The ship with self-cleaning propeller blades according to claim 3, characterized in that: The micro texture is a microporous structure, a groove structure or a coating structure or a combination thereof.

5. The ship with self-cleaning propeller blades according to claim 1, characterized in that: Both sides of the hull are equipped with wing plate structures, and the interior of the hull is equipped with solar cells; the upper surface of the wing plate structure is provided with a solar panel electrically connected to the solar cell, and the solar panel converts solar energy into electrical energy and then powers the propeller assembly through the solar cell.

6. The ship with self-cleaning propeller blades according to claim 1, characterized in that: The tail and rudder of the hull are made of shape memory alloy material and are configured to change the shape of the hull according to the acquired temperature and speed information, thereby improving the propulsion efficiency and stability of the ship; the structural part of the hull is made of variable stiffness material and is configured to increase or decrease the load-bearing capacity of the hull by adjusting the material stiffness.

7. The ship with self-cleaning propeller blades according to any one of claims 1 to 6, characterized in that: The propeller blades are disassembled and replaced by means of a slide rail structure in combination with rivets.

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