A rim propeller with superhydrophobic microstructure and in-situ gas production device

Abstract

The application provides a rim propeller with super-hydrophobic microstructure and in-situ gas production device, and belongs to the technical field of ship electric propulsion. The rim propeller comprises a shell, a rim and an in-situ gas production device, the rim is rotatably arranged in the shell, the outer edge of the rim is provided with super-hydrophobic microstructure, a gas storage groove is arranged on the super-hydrophobic microstructure, the in-situ gas production device comprises a storage container, a transportation driver and a transportation pipeline, the output end of the transportation pipeline is communicated with the gas storage groove, and the transportation driver is used for transporting gas production raw materials or gas generated by the gas production raw materials to the gas storage groove. By using the application, the super-hydrophobic microstructure and the gas in the gas storage groove form a gas-liquid interface to generate wall slip, the in-situ gas production device replenishes gas to maintain the stability of the interface, and the problem of low water power efficiency in the prior art can be solved.

Description

Technical Field

[0001] This invention relates to the field of marine electric propulsion technology, and in particular to a rim propeller with a superhydrophobic microstructure and an in-situ gas generation device. Background Technology

[0002] Friction thrusters (RDTs) are a highly integrated form of direct-drive electric propulsion that eliminates the need for shaft drives. They integrate the propulsion motor and propeller into a single unit, deployed together in external waterways. The propulsion motor in these thrusters is typically a permanent magnet motor, with its rotor composed of permanent magnets mounted on the rim. Friction thrusters usually include a non-sealed air gap between the motor's stator and rotor, forming an open water channel. This channel typically allows external water to enter to lubricate water-lubricated bearings or to dissipate heat from the motor's stator. However, the relative motion between the fluids within the rim causes losses due to viscous friction, resulting in a reduction in hydrodynamic efficiency.

[0003] In the prior art, stator end face protrusions and rotor end face protrusions are usually provided at the axial gap between the stator and rotor to reduce the flow velocity of the fluid in the gap, thereby reducing the viscous friction loss of the rim propeller rotor.

[0004] While existing rim-driven propellers can reduce the flow velocity of fluid within the gap to some extent, the contact surface during rim rotation remains a solid-liquid interface, resulting in significant frictional resistance between the rim and the fluid. Consequently, the hydrodynamic efficiency of the rim-driven propeller is relatively low. Summary of the Invention

[0005] This invention provides a rim propeller with a superhydrophobic microstructure and an in-situ gas generation device, which solves the problem of low hydrodynamic efficiency in existing technologies. The technical solution is as follows: A rim-mounted propeller with a superhydrophobic microstructure and an in-situ gas generation device includes: a housing, a rim, and an in-situ gas generation device. The rim is rotatably disposed within the housing, and a water-lubricated bearing is disposed between the rim and the housing. A stator armature is fixedly disposed on the inner side of the housing. A superhydrophobic microstructure is disposed on the outer edge of the rim, and a gas storage groove arranged circumferentially is formed on the superhydrophobic microstructure. A rotor matching the stator armature is fixedly disposed inside the rim, and a propeller is fixedly disposed on the inner edge of the rim. The in-situ gas generation device includes a storage container, a transport driver, and a transport pipeline. The input end of the transport pipeline is connected to the storage container, and the output end is connected to the gas storage groove. The storage container stores gas generation raw materials, and the transport driver is used to transport the gas generation raw materials or the gas generated by the gas generation raw materials to the gas storage groove.

[0006] Optionally, multiple air storage tanks are provided, and the multiple air storage tanks are evenly spaced along the axial direction of the wheel rim.

[0007] Optionally, it also includes a control module, which is signal-connected to the transport driver.

[0008] Optionally, a flow transmitter is installed on the transport pipeline, and the flow transmitter is signal-connected to the control module.

[0009] Optionally, it also includes an image acquisition module, which includes a high-speed camera and an LED light source. Both the high-speed camera and the LED light source are positioned facing the gas storage tank. The image acquisition module is used to acquire images of the gas storage tank and transmit signals to the control module.

[0010] Optionally, the transport pipe is located on the side near the input end of the wheel rim thruster, and the image acquisition module is located on the side near the output end of the wheel rim thruster.

[0011] Optionally, the gas-generating feedstock is a hydrogen peroxide solution.

[0012] Optionally, the walls of the gas storage tank are coated with a manganese dioxide layer.

[0013] Optionally, the transport driver is a water pump, and the transport driver is equipped with a water pump motor, which is signal-connected to the control module.

[0014] Optionally, the control module includes a computer, a vision controller, a PLC, and a frequency converter. The computer is signal-connected to the vision controller, the vision controller is signal-connected to the PLC, the high-speed camera, and the LED light source, and the PLC is signal-connected to the water pump motor.

[0015] The beneficial effects of the technical solutions provided in the embodiments of the present invention include at least the following: This invention provides a rim propeller with a superhydrophobic microstructure and an in-situ gas generation device. By setting a superhydrophobic microstructure on the outer edge of the rim and creating circumferentially arranged gas storage tanks on the microstructure, the gas stored in the storage tanks forms a gas-liquid interface between the outer edge of the rim and water, transforming the original liquid-solid contact interface into a gas-liquid contact interface. This generates a wall slip effect when water flows over the surface of the superhydrophobic microstructure, reducing the frictional resistance between the rim and water. Simultaneously, by setting an in-situ gas generation device including a storage container, a transport actuator, and a transport pipeline, the transport actuator transports the gas-generating raw material or the generated gas from the storage container to the gas storage tank via the transport pipeline. This allows the gas-liquid interface to recover and remain stable in a timely manner after being disrupted by external factors, thereby ensuring the continuous existence of the wall slip drag reduction effect. This effectively reduces the frictional loss in the rim gap flow area and effectively solves the problem of low hydrodynamic efficiency in the prior art. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic cross-sectional view of the overall structure provided in an embodiment of the present invention; Figure 2 This is the first type provided in the embodiments of the present invention. Figure 1 Enlarged view of point A; Figure 3 This is the second type provided in the embodiments of the present invention. Figure 1 Enlarged view of point A; Figure 4 This is the third type provided in the embodiments of the present invention. Figure 1 Enlarged view of point A; Figure 5 This is a schematic diagram of the rim structure provided in an embodiment of the present invention; Figure 6 This is a schematic diagram of the superhydrophobic microstructure provided in an embodiment of the present invention; Figure 7 This is a schematic diagram of the control module structure provided in an embodiment of the present invention; Figure 8 This is a schematic diagram illustrating the principle of in-situ gas generation provided by an embodiment of the present invention; Figure 9 This is a schematic diagram of the gas-liquid interface in the gas storage tank in a Cassie state provided in an embodiment of the present invention; Figure 10This is a schematic diagram of the gas-liquid interface in the gas storage tank in the Wenzel state provided in an embodiment of the present invention; Figure 11 This is a schematic diagram showing the gas-liquid interface in the gas storage tank provided in this embodiment of the invention in an intermediate state between Wenzel and Cassie.

[0018] In the diagram: 1-Outer shell; 11-Stator armature; 12-Water-lubricated bearing; 2-Rim; 21-Superhydrophobic microstructure; 211-Gas storage tank; 22-Rotor; 23-Propeller; 24-Manganese dioxide coating; 3-In-situ gas generation device; 31-Storage container; 32-Transport drive; 321-Water pump motor; 33-Transport pipeline; 34-Flow transmitter; 4-Control module; 41-Computer; 42-Vision controller; 43-PLC; 44-Frequency converter; 5-Image acquisition module; 51-High-speed camera; 52-LED light source. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0020] A rim propeller with a superhydrophobic microstructure and an in-situ gas generation device includes: a housing 1, a rim 2, and an in-situ gas generation device 3. The rim 2 is rotatably disposed in the housing 1. A water-lubricated bearing 12 is disposed between the rim 2 and the housing 1. A stator armature 11 is fixedly disposed on the inner side of the housing 1. A superhydrophobic microstructure 21 is disposed on the outer edge of the rim 2. A gas storage groove 211 is formed on the superhydrophobic microstructure 21 and arranged circumferentially. A rotor 22 matching the stator armature 11 is fixedly disposed inside the rim 2. A propeller 23 is fixedly disposed on the inner edge of the rim 2. The in-situ gas generation device 3 includes a storage container 31, a transport driver 32, and a transport pipe 33. The input end of the transport pipe 33 is connected to the storage container 31, and the output end is connected to the gas storage groove 211. The storage container 31 stores gas-generating raw materials. The transport driver 32 is used to transport the gas-generating raw materials or the gas generated by the gas-generating raw materials to the gas storage groove 211.

[0021] Exemplarily, in this embodiment of the invention, the outer shell 1 serves as the supporting base for the entire rim propeller. The stator armature 11 fixed inside the outer shell 11 generates a rotating magnetic field after being connected to an external power source. Since the rotor 22 is fixedly installed inside the rim 2 and matches the stator armature 11, the rotor 22 generates electromagnetic torque under the action of the rotating magnetic field, thereby driving the rim 2 to rotate around its own axis in the outer shell 1. The propeller 23 fixed on the inner edge of the rim 2 rotates together with the rim 2, performs work on the water and generates thrust. The thrust is transmitted to the outer shell 1 through the water-lubricated bearing 12 between the rim 2 and the outer shell 1, thereby propelling the vehicle forward. The water-lubricated bearing 12 simultaneously bears the radial and axial loads when the rim 2 rotates, and achieves lubrication and heat dissipation with the help of the water entering the gap. During the high-speed rotation of the rim 2, its outer edge experiences losses due to fluid viscous friction with the water. At this time, the superhydrophobic microstructure 21 on the outer edge of the rim 2 stores gas in the gas storage tank 211, forming a continuous gas-liquid interface between the solid and liquid. This transforms the original liquid-solid contact interface into a gas-liquid contact interface, causing a wall slip effect when water flows over the surface of the superhydrophobic microstructure 21, reducing the frictional resistance between the rim 2 and the water. When the gas in the gas storage tank 211 is lost due to external factors such as strong shear flow, or when the gas-liquid interface is disrupted, the in-situ gas generation device 3 is activated: the transport driver 32 transports the gas-generating material stored in the storage container 31 through the transport pipe 33. The output end of the transport pipe 33 is connected to the gas storage tank 211, allowing the gas-generating material or the gas generated by the material to replenish the gas storage tank 211, thereby restoring and maintaining the stability of the gas-liquid interface, ensuring the wall slip effect persists, and ultimately reducing frictional losses in the rim gap flow region and improving the hydrodynamic efficiency of the rim propeller. Figures 2 to 4 As shown, the cross-section of the gas storage tank 211 can be a V-shaped gas storage tank 211-a, a dovetail-shaped gas storage tank 211-b, or a fan-shaped gas storage tank 211-c. Different cross-sectional shapes of the gas storage tank 211 can adapt to different application scenarios, thereby allowing the generated gas to be better retained in the gas storage tank 211. When the gas production raw material is hydrogen peroxide solution, the transport actuator 32 transports the hydrogen peroxide solution to the vicinity of the gas storage tank 211 via the transport pipeline 33. During the transport and arrival at the gas storage tank 211, the hydrogen peroxide solution decomposes under the catalytic action of the manganese dioxide coating 24 to generate gas. Therefore, what the transport actuator 32 transports to the gas storage tank 211 can be either undecomposed hydrogen peroxide solution or gas generated by the decomposition of hydrogen peroxide solution in the process. Both are used to replenish the gas in the gas storage tank 211.

[0022] This invention provides a rim propeller with a superhydrophobic microstructure and an in-situ gas generation device. By setting a superhydrophobic microstructure 21 on the outer edge of the rim 2 and creating a circumferentially arranged gas storage tank 211 on the superhydrophobic microstructure 21, the gas stored in the gas storage tank 211 forms a gas-liquid interface between the outer edge of the rim 2 and water, transforming the original liquid-solid contact interface into a gas-liquid contact interface. This generates a wall slip effect when water flows over the surface of the superhydrophobic microstructure 21, reducing the frictional resistance between the rim 2 and water. Simultaneously, by setting an in-situ gas generation device 3 including a storage container 31, a transport actuator 32, and a transport pipe 33, the transport actuator 32 transports the gas-generating raw material or the generated gas from the storage container 31 through the transport pipe 33 to replenish the gas storage tank 211. This allows the gas-liquid interface to recover and remain stable promptly after being disrupted by external factors, ensuring the continuous existence of the wall slip drag reduction effect. This effectively reduces frictional losses in the flow domain between the rim 2 and effectively solves the problem of low hydrodynamic efficiency in existing technologies.

[0023] Optionally, multiple gas storage tanks 211 are provided, and the multiple gas storage tanks 211 are evenly spaced along the axial direction of the wheel rim 2.

[0024] Exemplary, in embodiments of the present invention, such as Figure 6 As shown, multiple gas storage tanks 211, evenly spaced along the axial direction, cooperate to form a continuous and uniform gas storage area along the axial direction on the outer edge of the rim 2. Each gas storage tank 211 independently stores gas and forms a gas-liquid interface at its opening, thereby uniformly increasing the contact area between gas and liquid and decreasing the contact area between solid and liquid throughout the entire axial length of the rim 2. When the rim 2 rotates and water flows axially along the outer edge of the rim 2, the gas-liquid interfaces at each gas storage tank 211 work together to make the wall slip effect more uniformly distributed in the axial direction and the drag reduction range larger. This avoids the situation where local areas still maintain liquid-solid contact and generate large frictional resistance due to the lack of gas storage structure, further reducing the overall frictional loss between the rim 2 and the water.

[0025] Optionally, it also includes a control module 4, which is signal-connected to the transport driver 32.

[0026] Exemplary, in embodiments of the present invention, such as Figure 7As shown, the control module 4 outputs control commands to the transport driver 32 via a signal connection. The transport driver 32 operates according to the received commands, thereby adjusting the amount of gas-producing raw material or the gas it generates is transported to the gas storage tank 211. The control module 4 generates control signals based on the actual operating conditions of the rim propeller and transmits them to the transport driver 32. The transport driver 32 then changes the transport flow rate of the gas-producing raw material, thereby regulating the amount of gas output in the gas storage tank 211. When the gas-liquid interface needs to be replenished, the control module 4 controls the transport driver 32 to increase the transport rate; when the gas-liquid interface is stable, the transport rate is reduced or stopped. This achieves controllable adjustment of the gas replenishment in the gas storage tank 211, ensuring the stable maintenance of the gas-liquid interface while avoiding excessive consumption of the gas-producing raw material.

[0027] Optionally, a flow transmitter 34 is installed on the transport pipeline 33, and the flow transmitter 34 is connected to the control module 4 via signal.

[0028] Exemplary, in embodiments of the present invention, such as Figure 7 As shown, the flow transmitter 34 is installed on the transport pipeline 33 to measure the actual flow rate of the gas-producing raw material in the transport pipeline 33 in real time. The measured flow rate is converted into an electrical signal and fed back to the control module 4. When the gas-producing raw material flows through the transport pipeline 33 under the drive of the transport driver 32, the flow transmitter 34 detects the real-time flow rate in the pipeline and converts it into a signal, which is then transmitted to the control module 4. The control module 4 compares the measured flow rate with the target flow rate and issues an adjustment command to the transport driver 32 based on the deviation, thereby performing closed-loop correction of the gas-producing raw material's transport flow rate. Through the real-time feedback from the flow transmitter 34, the control module 4 can detect the current actual gas output and make precise adjustments accordingly, making the gas replenishment in the gas storage tank 211 more accurate and further improving the accuracy and stability of the gas-liquid interface maintenance.

[0029] Optionally, it also includes an image acquisition module 5, which includes a high-speed camera 51 and an LED light source 52. Both the high-speed camera 51 and the LED light source 52 are positioned facing the gas storage tank 211. The image acquisition module 5 is used to acquire images of the gas storage tank 211 and transmit signals to the control module 4.

[0030] Exemplarily, in this embodiment of the invention, the high-speed camera 51 and the LED light source 52 are positioned towards the air reservoir 211 through a light-transmitting window provided on the housing 1, thus isolating the camera from the water in the air gap while obtaining an imaging path; alternatively, a waterproof camera can be placed directly in the air gap, as selected by a technician. Figure 1As shown, the LED light source 52 illuminates the gas storage tank 211, improving the contrast between the gas-liquid interface and the background and highlighting the details of the gas film. With the assistance of the LED light source 52, the high-speed camera 51 continuously acquires image information of the gas-liquid interface within the gas storage tank 211 and transmits the acquired image signals to the control module 4. The control module 4 processes and judges the received image information, identifies the current gas film coverage within the gas storage tank 211, and further adjusts the flow rate of the gas-producing raw material in the transport driver 32 accordingly. Through real-time monitoring by the image acquisition module 5, the control module 4 can grasp the true state of the gas-liquid interface within the gas storage tank 211, thereby replenishing gas in a targeted manner according to the actual situation, achieving more precise maintenance of the gas-liquid interface.

[0031] Optionally, the transport pipe 33 is located on the side near the input end of the wheel flange thruster, and the image acquisition module 5 is located on the side near the output end of the wheel flange thruster.

[0032] Exemplary, in embodiments of the present invention, such as Figure 1 As shown, when the rim propeller is working, the water, due to the pressure difference generated by the rotation of the propeller 23, flows into the gap between the rim 2 and the outer shell 1 from the input side and then flows out from the output side. Since the transport pipe 33 is located on the side near the input end, the gas-generating material output from the transport pipe 33 can flow axially along the surface of the superhydrophobic microstructure 21 along with the water flowing into the gap, ensuring that the gas-generating material fully acts on the gas storage tank 211. The image acquisition module 5 is located on the side near the output end, and it acquires the gas film situation in the downstream area of ​​the gap flow. Since the gas-generating material is continuously consumed along the flow, the downstream area is more representative of the true state of the overall gas film. Therefore, the image information at this location can effectively reflect the gas film situation of the entire area. At the same time, placing the transport pipe 33 and the image acquisition module 5 on opposite sides avoids the gas-generating material ejected from the transport pipe 33 from interfering with the normal imaging of the high-speed camera 51, ensuring clear image acquisition and accurate control. In another embodiment, an image acquisition module 5 and a transport pipe 33 can be provided at both the input and output ends of the rim thruster. When the rotor 22 rotates forward and reverse, the image acquisition module 5 and the transport pipe 33 located on the opposite side can be activated respectively, thereby improving the gas retention rate in the gas storage tank 211.

[0033] Optionally, the gas-producing feedstock is a hydrogen peroxide solution.

[0034] In an exemplary embodiment of the invention, hydrogen peroxide solution is stored as a gas-generating feedstock in storage container 31 and transported to gas storage tank 211 via transport pipeline 33 under the drive of transport driver 32. The hydrogen peroxide solution decomposes in gas storage tank 211 to generate oxygen, with the chemical reaction formula 2H₂O₂→2H₂O+O₂↑. The oxygen replenishes the gas storage tank 211, thereby maintaining the stability of the gas-liquid interface. Using hydrogen peroxide solution as a gas-generating feedstock, its decomposition products are water and oxygen, which are non-polluting and do not pollute the marine environment, demonstrating good environmental friendliness. Simultaneously, the upper ocean water itself contains a certain concentration of hydrogen peroxide, which, in conjunction with the gas-generating effect in gas storage tank 211, helps maintain the stability of the gas-liquid interface when encountering weak shear flow.

[0035] Optionally, the walls of the gas storage tank 211 are provided with a manganese dioxide coating 24.

[0036] For example, in this embodiment of the invention, a manganese dioxide coating 24 is provided on the wall of the gas storage tank 211. The manganese dioxide coating 24 is provided on the wall of the gas storage tank 211 as a catalyst for the decomposition of hydrogen peroxide. Since the surface of the superhydrophobic microstructure 21 has a repulsive effect on the aqueous solution, when the gas-liquid interface is in the Cassie state and the gas film is intact, water and the hydrogen peroxide solution flowing with the water are blocked outside the opening of the gas storage tank 211 and will not penetrate into the interior of the gas storage tank 211 to contact the manganese dioxide coating 24. At this time, neither gas is produced nor is gas production required. Only when the gas-liquid interface degrades due to external factors such as strong shear flow, the gas film is partially or completely destroyed (i.e., in the Wenzel state or transition state), and water penetrates into the interior of the gas storage tank 211, does the hydrogen peroxide solution that penetrates with the water come into contact with the manganese dioxide coating 24 on the tank wall and decompose to produce gas under its catalysis, thereby achieving self-regulation that gas production is triggered only when the gas film needs to be replenished. When the hydrogen peroxide solution, used as a gas-generating feedstock, flows with the water stream through the gas storage tank 211 and comes into contact with the manganese dioxide coating 24 on the tank wall, the hydrogen peroxide rapidly decomposes into water and oxygen under the catalytic action of the manganese dioxide. The generated oxygen directly replenishes the voids within the gas storage tank 211, achieving in-situ gas generation. Due to the catalytic effect of the manganese dioxide coating 24, the decomposition rate of hydrogen peroxide is significantly accelerated, enabling faster and more efficient oxygen generation at the gas storage tank 211. This allows the gas-liquid interface to promptly recover to a stable Cassie state after being disrupted, ensuring the continuous and stable drag reduction effect of wall slippage.

[0037] Exemplarily, in an embodiment of the present invention, reference is made to Figures 9 to 11 The gas-liquid interface within the gas storage tank 211 has three wetting states: Cassie state, Wenzel state, and a transitional state between the two. The in-situ gas generation device 3 transitions the gas-liquid interface between these wetting states by supplying gas to the gas storage tank 211. Figure 9As shown, when the gas storage tank 211 contains sufficient gas, the gas blocks water from entering the tank, preventing water from penetrating the internal gaps. A continuous and stable gas-liquid interface is formed at the tank opening, which is in a Cassie state. In the Cassie state, water only contacts the gas-liquid interface at the tank opening, resulting in the smallest solid-liquid contact area, the strongest wall slippage effect, the lowest frictional resistance between the rim 2 and the water, and the best drag reduction effect. Figure 10 As shown, when the gas in the gas storage tank 211 is lost due to external factors such as strong shear flow, water invades the voids inside the gas storage tank 211 and occupies the area originally occupied by gas. The gas-liquid interface at the top of the gas storage tank 211 is disrupted, and the gas-liquid interface is in a Wenzel state. In the Wenzel state, the water directly contacts the tank wall of the gas storage tank 211, the solid-liquid contact area is maximized, the wall slippage effect basically disappears, the frictional resistance between the rim 2 and the water increases significantly, and the drag reduction effect is lost. Figure 11 As shown, when the gas-liquid interface degenerates from the Cassie state to the Wenzel state, and the water invading the gas storage tank 211 carries gas-generating feedstock, the feedstock generates gas within the gas storage tank 211. The newly generated gas gradually occupies the voids inside the gas storage tank 211 and discharges the invading water towards the tank opening, causing the damaged gas-liquid interface to gradually rise and recover. At this time, the gas-liquid interface is in a transitional state between the Cassie and Wenzel states. As the gas generation process continues, the gas-liquid interface in the transitional state continuously recovers to the Cassie state, eventually reforming a stable Cassie state. Through the above-mentioned wetting state transition, the in-situ gas generation device 3 replenishes gas to the gas storage tank 211 in a timely manner when the gas-liquid interface degenerates from the Cassie state to the Wenzel state, driving the gas-liquid interface to recover from the transitional state to the Cassie state. This ensures that the gas-liquid interface at the gas storage tank 211 is maintained in the Cassie state with the best drag reduction effect for a long time, guaranteeing the continuous stability of the wall sliding drag reduction effect.

[0038] Optionally, the transport driver 32 is a water pump, and a water pump motor 321 is provided on the transport driver 32. The water pump motor 321 is connected to the control module 4 via signal.

[0039] Exemplary, in embodiments of the present invention, such as Figure 1As shown, the transport driver 32 is implemented using a water pump, which is driven by a water pump motor 321 mounted on it. The water pump motor 321 is connected to the control module 4 via a signal. The control module 4 outputs a control signal to the water pump motor 321, which drives the water pump to operate, pumping the hydrogen peroxide solution in the storage container 31 into the gas storage tank 211 via the transport pipe 33. The control module 4 adjusts the speed of the water pump motor 321 by changing the control signal to the water pump motor 321, thereby precisely adjusting the pump's delivery flow rate and achieving precise control of the hydrogen peroxide solution input. This, in turn, precisely regulates the gas production and the maintenance state of the gas-liquid interface at the gas storage tank 211.

[0040] Optionally, the control module 4 includes a computer 41, a vision controller 42, a PLC 43, and a frequency converter 44. The computer 41 is connected to the vision controller 42 via signals. The vision controller 42 is connected to the PLC 43, the high-speed camera 51, and the LED light source 52 via signals. The PLC 43 is connected to the water pump motor 321 via signals.

[0041] For example, in this embodiment of the invention, the vision controller 42 is connected to and powers the high-speed camera 51 and the LED light source 52, controls the LED light source 52 to improve the contrast between the target and the background, and converts the raw image information output by the high-speed camera 51 into processable data information. Then, an algorithm is run to detect the gas film on the surface of the superhydrophobic microstructure 21, obtaining detection results such as the gas film coverage rate. Specifically, the areas covered by gas and the areas wetted by water in the gas storage tank 211 have different optical properties. The gas-liquid interface strongly reflects incident light and appears as a bright area in the image, while the areas where gas is lost and water is wetted appear as dark areas in the image. The vision controller 42 performs image segmentation and binarization processing on the image acquired by the high-speed camera 51 based on the above-mentioned differences in brightness, dividing the image into a gas film covered area and a wetted area. The ratio of the area of ​​the gas film covered area to the total area of ​​the imaging area of ​​the gas storage tank 211 is used as the gas film coverage rate. The critical value is the minimum gas film coverage rate required to maintain effective wall slip, which is determined by pre-measuring the correspondence between the gas film coverage rate and the drag reduction effect. The vision controller 42 compares the gas film coverage rate with the critical value. When the gas film coverage rate is lower than the critical value, it determines that gas replenishment is needed and outputs a corresponding value to the PLC 43. When the gas film coverage rate is not lower than the critical value, it determines that gas replenishment is not needed and does not output or reduces the output. The PLC 43 executes a control algorithm (such as PID regulation), converts the calculation result into a signal that the frequency converter 44 can recognize, and outputs it to the frequency converter 44. The frequency converter 44 executes the instructions of the PLC 43 to change the power supply frequency and voltage of the water pump motor 321, thereby precisely adjusting the water pump speed and realizing the control of the flow rate of hydrogen peroxide solution pumped into the transport pipeline 33. During this process, the flow transmitter 34 converts the measured real-time flow rate in the pipeline into an industrial standard electrical signal and feeds it back to the PLC 43. The PLC 43 dynamically adjusts accordingly to form a closed-loop control. At the same time, the computer 41 is connected to the vision controller 42, which can realize human-machine interaction and data management functions. Operators can monitor and intervene through the computer 41, so that the entire in-situ gas generation process can be automatically and precisely controlled.

[0042] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains. The terms “first,” “second,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an” or “a” and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms “comprising” or “including” and similar terms mean that the elements or objects preceding “comprising” or “including” encompass the elements or objects listed following “comprising” or “including” and their equivalents, and do not exclude other elements or objects. The terms “connected” or “linked” and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms “upper,” “lower,” “left,” and “right” are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0043] The above description is merely an optional embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A rim propeller with a superhydrophobic microstructure and an in-situ gas generation device, characterized in that, include: The outer shell (1), the rim (2), and the in-situ gas generation device (3) are all included. The rim (2) is rotatably disposed in the outer casing (1). A water-lubricated bearing (12) is disposed between the rim (2) and the outer casing (1). A stator armature (11) is fixedly disposed on the inner side of the outer casing (1). A superhydrophobic microstructure (21) is disposed on the outer edge of the rim (2). An air storage groove (211) is provided on the superhydrophobic microstructure (21) arranged circumferentially. A rotor (22) matching the stator armature (11) is fixedly disposed inside the rim (2). A propeller (23) is fixedly installed on the inner edge of the rim (2). The in-situ gas generation device (3) includes a storage container (31), a transport driver (32), and a transport pipe (33). The input end of the transport pipe (33) is connected to the storage container (31), and the output end is connected to the gas storage tank (211). The storage container (31) stores gas generation raw materials. The transport driver (32) is used to transport the gas generation raw materials or the gas generated by the gas generation raw materials to the gas storage tank (211).

2. The rim propeller with superhydrophobic microstructure and in-situ gas generation device according to claim 1, characterized in that, Multiple gas storage tanks (211) are provided, and the multiple gas storage tanks (211) are evenly spaced along the axial direction of the wheel rim (2).

3. The rim propeller with superhydrophobic microstructure and in-situ gas generation device according to claim 1, characterized in that, It also includes a control module (4), which is signal-connected to the transport driver (32).

4. The rim propeller with superhydrophobic microstructure and in-situ gas generation device according to claim 3, characterized in that, A flow transmitter (34) is installed on the transport pipeline (33), and the flow transmitter (34) is connected to the control module (4) via signal.

5. The rim propeller with superhydrophobic microstructure and in-situ gas generation device according to claim 3, characterized in that, It also includes an image acquisition module (5), which includes a high-speed camera (51) and an LED light source (52). The high-speed camera (51) and the LED light source (52) are both positioned facing the gas storage tank (211). The image acquisition module (5) is used to acquire images of the gas storage tank (211) and transmit signals to the control module (4).

6. The rim propeller with superhydrophobic microstructure and in-situ gas generation device according to claim 5, characterized in that, The transport pipe (33) is located on the side near the input end of the wheel rim thruster, and the image acquisition module (5) is located on the side near the output end of the wheel rim thruster.

7. The rim propeller with superhydrophobic microstructure and in-situ gas generation device according to claim 5, characterized in that, The gas-producing feedstock is a hydrogen peroxide solution.

8. The rim propeller with superhydrophobic microstructure and in-situ gas generation device according to claim 7, characterized in that, The gas storage tank (211) has a manganese dioxide coating (24) on its tank wall.

9. The rim propeller with superhydrophobic microstructure and in-situ gas generation device according to claim 7, characterized in that, The transport driver (32) is a water pump, and a water pump motor (321) is provided on the transport driver (32). The water pump motor (321) is connected to the control module (4) via signal.

10. The rim propeller with a superhydrophobic microstructure and in-situ gas generation device according to claim 9, characterized in that, The control module (4) includes a computer (41), a vision controller (42), a PLC (43) and a frequency converter (44). The computer (41) is connected to the vision controller (42) via signal. The vision controller (42) is connected to the PLC (43), the high-speed camera (51) and the LED light source (52) via signal. The PLC (43) is connected to the water pump motor (321) via signal.

Images