Clover-shaped superconducting magnetofluid propeller and propelling system

Abstract

The invention discloses a clover-shaped superconducting magnetofluid thruster and a thrusting system.The thruster comprises a thrust generating module, a flow guiding module and a reversing transmission module, the thrust generating module comprises at least two superconducting coil assemblies and a protection shell, and the superconducting coil assemblies are rotationally connected into the protection shell; a seawater channel is formed in each superconducting coil assembly, the area of the cross section of each seawater channel is gradually reduced from the inlet end to the outlet end of the seawater channel, the flow guide module wraps the protective shell and is in a streamline shape from the inlet end of the seawater channel to the outlet end of the seawater channel, and the reversing transmission module is fixedly connected with the flow guide module. On the premise that the quiet performance is guaranteed, the propelling efficiency of the superconducting magnetofluid propeller is improved, and the navigation efficiency and navigation safety are guaranteed through cooperation of a series of intelligent devices.

Description

Technical Field

[0001] The present invention relates to the technical field of magnetohydrodynamic thrusters, and in particular to a cloverleaf-shaped superconducting magnetohydrodynamic thruster and a propulsion system. Background Art

[0002] Traditional marine propulsion systems are generally mechanically assembled, relying mainly on a combination of metal components such as propellers, transmission gear sets, and drive shafts. They are characterized by precise structural design, flexible operation, good maneuverability, and high propulsion power. However, in actual applications, there are obvious shortcomings: for example, metal parts are prone to rust when immersed in salt water for a long time, and repeated friction at the gear meshing site will cause continuous wear. The entire transmission mechanism uses a hard connection method, which will transmit strong vibrations during operation, not only generating harsh noise, but in extreme cases, may cause the drive shaft to deform or break. Take the propeller as an example. When it is running at a continuous high speed, a dense group of bubbles will form at the tip of the blade. The shock waves generated when these bubbles burst will not only intensify the vibration of the hull, but also erode the surface of the blade. Under these dual effects, the propulsion efficiency will gradually decrease, ultimately affecting the ship's maximum speed performance.

[0003] Compared to traditional mechanical propulsion systems, superconducting magnetohydrodynamic propulsion (SMHD) utilizes the interaction between electric currents and magnetic fields in seawater to generate thrust. Requiring no propeller blades, gear transmission mechanisms, or pumps, SMHD propulsion is a completely silent propulsion system, completely eliminating the vibration, noise, and power limitations associated with mechanical rotation. This makes it possible to achieve high-speed, ultra-high-power ship propulsion. However, existing SMHD propulsion systems suffer from low thrust and efficiency due to their inherent structural characteristics. For example, a SMHD propulsion system disclosed in publication number CN118372966A comprises a seawater channel, a pair of staggered electrodes, and a rectangular coil. It propels the vehicle forward by utilizing the Lorentz magnetic reaction force generated by seawater as a conductive solution. The single-channel structure of this patented technology results in low thrust, impacting its effectiveness. Therefore, research is focused on structural innovations to achieve higher thrust density and maximize propulsion efficiency. Summary of the Invention

[0004] In view of the above-mentioned deficiencies in the prior art, the present invention proposes a clover-shaped superconducting magnetohydrodynamic thruster and a propulsion system to solve the technical problem of low propulsion efficiency of the existing superconducting magnetohydrodynamic thruster.

[0005] In order to achieve the above technical objectives, the present invention adopts the following technical solutions: In a first aspect, the present invention provides a clover-shaped superconducting magnetohydrodynamic propulsion device, comprising: A thrust generating module comprising at least two superconducting coil assemblies and a protective shell, wherein the plurality of superconducting coil assemblies are rotatably connected to the interior of the protective shell, and each superconducting coil assembly forms a seawater channel, wherein the cross-sectional area of the seawater channel gradually decreases from its inlet end to its outlet end; a flow guide module, the flow guide module being wrapped around the outside of the protective shell and being streamlined from the inlet end to the outlet end of the seawater channel; The reversing transmission module is fixedly connected to the flow guide module and is used to realize free steering of the propeller.

[0006] In some embodiments, the thrust generating module includes three superconducting coil assemblies, which are overlapped in a spiral clover shape and tightly arranged on the central axis inside the protective shell, and the outer sides of the three superconducting coil assemblies are respectively tangent to the inner wall of the protective shell.

[0007] In some embodiments, each of the superconducting coil assemblies includes a pipe, an electrode, and a superconducting coil. The inner cavity of the pipe forms the seawater channel, and the two ends of the pipe respectively form the inlet end and the outlet end. The inlet end, the seawater channel, and the outlet end are connected in sequence. The electrodes are arranged in the pipe and symmetrically along the central axis of the pipe, and the superconducting coils are spirally distributed outside the pipe.

[0008] In some embodiments, each of the superconducting coil assemblies further includes a liquid helium container, which is wrapped around the outside of the superconducting coil, and the gap between the liquid helium container and the pipeline is filled with liquid helium to provide a low-temperature environment for the superconducting coil.

[0009] In some embodiments, the guide module includes a guide vane assembly and a straightening assembly, the straightening assembly is wrapped around the outside of the protective shell, and the guide vane assembly is arranged on one side of the straightening assembly at the inlet end of the seawater channel and is fixedly connected to the straightening assembly.

[0010] In some embodiments, the guide vane assembly includes a rotating electrode, blades and a casing, one end of the rotating electrode is fixedly connected to the superconducting coil assembly, multiple blades are evenly arranged around the rotating electrode at a certain angle and one end is fixedly connected to the rotating electrode, and the casing is wrapped around the outside of the multiple blades and one end is fixedly connected to the rectifier assembly.

[0011] In some embodiments, the reversing transmission module includes a transmission shaft, a rotating assembly and a housing assembly. The transmission shaft is connected to the rotating assembly so that the transmission shaft and the rotating assembly rotate synchronously. The transmission shaft and the rotating assembly are arranged inside the housing assembly, and the transmission shaft is fixedly connected to the flow guide module.

[0012] In some embodiments, the rotary assembly includes a stator bracket, a bearing stator, a motor stator, a rotary motor, and a bearing rotor. The stator bracket is sleeved on the outside of the transmission shaft. The motor stator is fixed to the stator bracket and sleeved on the side of the transmission shaft away from the transmission end. The rotary motor and the bearing rotor are in transmission connection with the transmission shaft. The bearing stator is fixed to the rotary motor and the bearing rotor and sleeved on the side of the transmission shaft away from the transmission end. The housing assembly includes a support shell and a connecting piece. The connecting piece is sleeved on the outside of the transmission shaft and has no relative movement with the transmission shaft. The bottom of the connecting piece is fixedly connected to the flow guide module, and the support shell is wrapped around the outside of the rotating assembly.

[0013] In some embodiments, the thruster further comprises a control module, wherein the control module comprises: Safety protection module, used to ensure safe operation of ships; Information collection module, used to obtain ship data information; The motion control module is used to control the magnetic field, electric field strength and the direction of thruster injection.

[0014] In a second aspect, the present invention further provides a cloverleaf-shaped superconducting magnetohydrodynamic propulsion system, which comprises at least one superconducting magnetohydrodynamic propulsor as provided in the first aspect of the present invention, and a matching power supply device and cooling device.

[0015] Compared with the prior art, the beneficial effects of the present invention mainly include: The clover-shaped superconducting magnetohydrodynamic thruster provided by the present invention has a thrust generating module designed to include at least two superconducting coil assemblies, that is, it includes at least two seawater channels, and the cross-sectional area of the seawater channels gradually decreases from their inlet end to the outlet end. In this way, the affected area of seawater can be increased and the seawater flow rate in a constant time can be increased, thereby generating stronger thrust and increasing the propulsion efficiency of the thruster. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 1 is a schematic diagram of the overall structure of the propeller of the present invention; Figure 2 is a front view of the propeller of the present invention; Figure 3 is a side view of the propeller of the present invention; Figure 4 1 is a schematic structural diagram of the thrust generating module of the present invention; Figure 5 is a schematic structural diagram of the superconducting coil assembly of the present invention; Figure 61 is a schematic structural diagram of the guide vane assembly of the present invention; Figure 7 is a cross-sectional view of the reversing transmission module of the present invention; Figure 8 It is a structural block diagram of the control module of the present invention; Figure 9 1 is a diagram showing the working principle of the propeller of the present invention.

[0017] Description of reference numerals: 100, thrust generation module, 110, superconducting coil assembly, 111, pipeline, 111a, seawater channel, 111b, inlet end, 111c, outlet end, 112, electrode, 113, superconducting coil, 114, liquid helium storage container, 120, protective shell; 200, guide module, 210, guide vane assembly, 211, rotating electrode, 212, blade, 213, housing, 220, fairing assembly, 221, first fairing, 222, second fairing; 300, reversing transmission module, 310, transmission shaft, 320, rotary assembly, 321, stator bracket, 322, bearing stator, 323, motor stator, 324, rotary motor and bearing rotor, 330, housing assembly, 331, support shell, 332, connector; 400, control module, 410, safety protection module, 420, information acquisition module, 430, motion control module. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0019] The present invention addresses the technical problem that existing superconducting magnetohydrodynamic thrusters have low propulsion efficiency due to structural limitations. It proposes a clover-shaped superconducting magnetohydrodynamic thruster, which improves the thrust and efficiency of the superconducting magnetohydrodynamic thruster while ensuring ultra-quietness, making it more widely applicable.

[0020] like Figures 1 to 3 As shown, the present invention relates to a clover-shaped superconducting magnetohydrodynamic thruster, which includes a thrust generating module 100 , a flow guiding module 200 and a reversing transmission module 300 .

[0021] Among them, the thrust generating module 100 includes at least two superconducting coil assemblies 110 and a protective shell 120, and multiple superconducting coil assemblies 110 are rotatably connected to the inside of the protective shell 120. Each superconducting coil assembly 110 is formed with a seawater channel 111a, and the cross-sectional area of the seawater channel 111a gradually decreases from its inlet end 111b to its outlet end 111c; the flow guide module 200 is wrapped around the outside of the protective shell 120, and the flow guide module 200 is streamlined from the inlet end 111b of the seawater channel 111a to its outlet end 111c; the reversing transmission module 300 is fixedly connected to the flow guide module 200 for realizing free steering of the propeller.

[0022] In the above technical solution, the thrust generating module 100 includes at least two superconducting coil assemblies 110, and each superconducting coil assembly 111 has a seawater channel 111a. That is to say, the thruster described in the present invention includes at least two seawater channels 111a, and the cross-sectional area of each seawater channel 111a gradually decreases from its inlet end 111b to the outlet end 111c. In this way, not only the area affected by the seawater is increased, but also the seawater flow rate in the same time is increased, thereby enabling the thruster provided by the present invention to generate stronger thrust, thereby improving the propulsion efficiency of the thruster.

[0023] In one preferred embodiment, Figure 4 As shown, the thrust generating module 100 includes three superconducting coil assemblies 110 , which are overlapped in a spiral clover shape and are tightly arranged on the central axis inside the protective shell 120 , and the outer sides of the three superconducting coil assemblies 110 are tangent to the inner wall of the protective shell 120 .

[0024] In this embodiment, the clover-shaped superconducting coil assembly 110 can increase the distance of seawater, and the circular cross-sectional area of the seawater channel 111a is uniformly reduced along the axis, which can significantly increase the seawater flow rate in the channel and produce a stronger propulsion effect.

[0025] In one preferred embodiment, Figure 5 As shown, each superconducting coil assembly 110 includes a pipe 111, two electrodes 112 and a plurality of superconducting coils 113. The inner cavity of the pipe 111 forms the seawater channel 111a. The two ends of the pipe 111 respectively form the inlet end 111b and the outlet end 111c. The inlet end 111b, the seawater channel 111a and the outlet end 111c are connected in sequence. The two electrodes 112 are disposed in the pipe 111 and are symmetrically arranged along the central axis of the pipe 111. The superconducting coils 113 are spirally distributed on the outside of the pipe 111.

[0026] In one preferred embodiment, each superconducting coil assembly 110 further includes a liquid helium container 114 , which is wrapped around the outside of the superconducting coil 113 , and the gap between the liquid helium container 114 and the pipe 111 is filled with liquid helium.

[0027] In the above technical solution, the electrode 112 is a strip-shaped graphite electrode, the superconducting coil 113 is a saddle-shaped coil, and the liquid helium filled in the gap between the liquid helium container 114 and the pipe 111 provides a low-temperature environment for the superconducting coil 113, ensuring that the superconducting coil 113 generates a strong magnetic field.

[0028] Since the cross-sectional area of the seawater channel 111a gradually decreases from the inlet end 111b to the outlet end 111c, the cross-sectional area of the protective shell 120 wrapped around it also gradually decreases to adapt to it, thereby maintaining the shape of the superconducting coil assembly 110 and protecting the superconducting coil assembly 110.

[0029] In one preferred embodiment, the guide module 200 includes a guide vane assembly 210 and a straightening assembly 220. The straightening assembly 220 is wrapped around the outside of the protective shell 120. The guide vane assembly 210 is arranged on one side of the straightening assembly 220 located at the inlet end 111b of the seawater channel 111a and is fixedly connected to the straightening assembly 220.

[0030] In one preferred embodiment, Figure 6 As shown, the guide vane assembly 210 includes a rotating electrode 211, blades 212 and a shell 213. One end of the rotating electrode 211 is fixedly connected to the superconducting coil assembly 110, specifically, connected to the end face of the pipe 111. Multiple blades 212 are evenly arranged around the rotating electrode 211 at a certain angle and one end is fixedly connected to the rotating electrode 211. The shell 213 wraps around the outside of the multiple blades 212 and one end is fixedly connected to the rectifier assembly 220.

[0031] In the above technical solution, the shell 213 is a conical shell with a cross-sectional area gradually increasing from the end away from the rectifier assembly 220 to the end close to the rectifier assembly 220. On the one hand, it plays a role in protecting the rotating electrode 211 and the blades 212, and on the other hand, it makes the water flow in the direction of the blades 212 to enter the seawater channel 111a.

[0032] In one preferred embodiment, the fairing assembly 220 includes a first fairing 221 and a second fairing 222, wherein the first fairing 221 is a steeper arc-shaped surface, and the top is connected to the reversing transmission module 300, specifically to the connecting member 332; the second fairing 222 is a gentler arc-shaped surface, and the first fairing 221, the second fairing 222 and the outer shell 213 are tightly and smoothly connected without any gaps. The overall structure formed by the first fairing 221, the second fairing 222 and the outer shell 213 conforms to fluid mechanics, and the corners of each part are smoothly transitioned, similar to the wings of an airplane, providing partial lift for the hull, reducing the draft and seawater resistance, and thereby reducing the resistance of the propeller in fluid motion.

[0033] In the above technical solution, the first fairing 221 and the second fairing 222 are both made of carbon fiber composite materials, which have the characteristics of light weight and high strength. They can significantly reduce the weight of the propeller, thereby reducing the overall energy consumption of the ship and improving fuel efficiency. They have strong corrosion resistance and can be used for a long time in harsh marine environments without being corroded.

[0034] In one of the preferred embodiments, an inner layer, a reinforcement layer, a filling layer and an outer layer are arranged between the rectifier assembly 220 and the protective shell 120. The inner layer and the outer layer are made of high-strength titanium alloy Ti-6Al-4V made by the EBCHM single melting method. The reinforcement layer adopts a glass fiber reinforced plastic layer structure, and glass felt is laid between every two layers of glass cloth. This can achieve good pressure resistance and corrosion resistance of the device, reduce material loss during operation, and at the same time reduce magnetic leakage and sound leakage during the ship's navigation, thereby enhancing the ship's stealth; the outer layer and the reinforcement layer are fixed by mechanical connection, the filling layer and the reinforcement layer are connected by gluing, and the inner layer and the filling layer are fixed by a mixed connection. The layers are tight and seamless, overcoming the weak peeling stress resistance of the adhesive layer and limiting the splitting damage of the bolt holes.

[0035] In one preferred embodiment, Figure 7 As shown, the reversing transmission module 300 includes a transmission shaft 310, a rotating assembly 320 and a housing assembly 330. The transmission shaft 310 is connected to the rotating assembly 320 so that the transmission shaft 310 and the rotating assembly 320 rotate synchronously. The transmission shaft 310 and the rotating assembly 320 are arranged inside the housing assembly 330, and the transmission shaft 310 is fixedly connected to the guide module 200, specifically to the first fairing 221.

[0036] In one embodiment, the rotating assembly 320 includes a stator bracket 321, a bearing stator 322, a motor stator 323, a rotating motor and a bearing rotor 324, the stator bracket 321 is sleeved on the outside of the transmission shaft 310, the motor stator 323 is fixed on the stator bracket 321 and sleeved on the side of the transmission shaft 310 away from the transmission end, the rotating motor and the bearing rotor 324 are transmission-connected to the transmission shaft 310, and the bearing stator 322 is fixed on the rotating motor and the bearing rotor 324 and sleeved on the side of the transmission shaft 310 away from the transmission end.

[0037] The shell assembly 330 includes a support shell 331 and a connecting member 332. The connecting member 332 is sleeved on the outside of the transmission shaft 310 and has no relative movement with the transmission shaft 310. The bottom of the connecting member 332 is fixedly connected to the guide module 200, and the support shell 331 is wrapped around the outside of the rotating assembly 320.

[0038] In the above technical solution, the connecting member 332 is a connecting flange, the connecting member 332 is engaged with the transmission shaft 310, and the transmission shaft 310 is connected to the rotary motor and the bearing rotor 324 to provide transmission power for the connecting member 332, thereby realizing free and flexible steering of the propeller.

[0039] In one embodiment, Figure 8 As shown, the thruster provided by the present invention further includes a control module 400 , and the control module 400 includes a safety protection module 410 , an information acquisition module 420 , and a motion control module 430 .

[0040] In the above technical solution, the safety protection module 410 includes fault interlock, fault deceleration, fault stop and emergency stop; the safety protection module 410 includes S1. Start interlock when it is specifically implemented: before the propeller is operated, the security system collects a restricted start signal, and it cannot be started even if there is a remote start instruction; S2. Fault deceleration: during the operation of the propeller, the security system receives a fault deceleration cause signal, and immediately issues a fault deceleration instruction and an audible and visual alarm, and the propeller slows down to the specified thrust; S3. Fault stop: during the operation of the propeller, the security system receives a serious fault signal, and immediately issues a fault stop instruction and an audible and visual alarm, and the propeller stops running immediately; S4. Emergency stop: Independent "emergency stop" buttons are provided in the cab, control room and propeller cabin. These buttons are not restricted by the control authority of the operating part and can directly stop the propeller.

[0041] In the above technical solution, the information acquisition module 420 mainly includes the following contents: Coil voltage: by collecting the voltage between the midpoint and the two end points of the coil, when the voltage difference is greater than the set value, the circuit protection coil is disconnected; Excitation and demagnetization voltage and current: the monitoring system monitors the state of the coil when the superconducting magnet is excited and demagnetized, and changes the excitation voltage by driving the current regulating device, thereby changing the excitation current to achieve the change of the magnetic field size; Magnetic flux density: the monitoring system collects the magnetic field of the superconducting magnet through the Hall element to confirm whether the target magnetic field required by the control system is generated; Low temperature thermostat and coil temperature: during navigation, closely monitor the temperature, pressure, liquid level changes of the cryogenic container and the superconducting The temperature of the coil is monitored. When any parameter is abnormal, the system immediately executes safety protection instructions to protect the superconducting coil and its cryogenic container. Seawater flow rate: The monitoring system uses ultrasonic flowmeters to collect the flow rate of the seawater conduit and inlet, and calculates the thrust generated. Seawater pressure: The system detects the water pressure of the seawater inlet and outlet to observe the operating status of the magnetic fluid propulsion. Electrode current and voltage: By collecting the voltage between the midpoint and the two end points of the electrode, when the voltage difference is greater than the set threshold, the data is transmitted to the control system, and the control system completes the triple instructions of self-test, protection, and alarm. The monitoring system presets a matching table for magnetic field strength and electrode current in the program. During automatic control, it automatically adjusts according to the set acceleration and deceleration rates and matching curve. The monitoring system presets a matching table for magnetic field strength and electrode current in the program. During automatic control, it automatically adjusts according to the set acceleration and deceleration rates and matching curve.

[0042] In the above technical solution, the motion control module 430 includes S1. Remote control operation and stop of the thruster: when the thruster meets the operating conditions, remote control start can be performed in the control room; when the thruster is in operation, remote control stop can be performed after the thrust drops to a reasonable range; S2. Thrust adjustment: the control system increases and decreases the thrust by controlling the current regulating device of the thruster. In the automatic state, the thrust is determined according to the position of the operating handle; in the semi-automatic state, the thrust is increased or decreased by the buttons in the control room; S3. Manual operation: manual start, stop and thrust adjustment can be achieved on the manual operation panel of the thruster.

[0043] like Figure 9 As shown, the working principle of the clover-shaped superconducting magnetohydrodynamic thruster provided by the present invention is: First, the basic principle of the thruster of the present invention is as follows: Magnetohydrodynamic propulsion technology is a propulsion method that utilizes the interaction between electric current and magnetic field in seawater to generate seawater motion. Specifically, magnetohydrodynamic propulsion uses seawater as a conductor, using magnets to establish a magnetic field within the channel through which the magnetohydrodynamic propulsion device passes through the seawater. Electricity is then supplied to the seawater via electrodes. At this point, the current-carrying seawater is subjected to an electromagnetic force in a magnetic field perpendicular to it, with the direction of the force determined by the left-hand rule. When subjected to this force, the seawater moves in the direction of the electromagnetic force. If the direction of movement is toward the stern of the ship, its reaction force propels the ship forward. Given a constant magnetic field and flow rate, a large current, large electromagnetic force, and thus thrust, results in a faster ship motion. Conversely, a small current, small electromagnetic force, and thus thrust, results in a slower ship motion. Given a constant magnetic field and current, a greater flow rate generates greater propulsion.

[0044] Secondly, in the thruster of the present invention, the electrodes 112 are placed alternately with the superconducting coils 113 as electrodes for generating a magnetohydrodynamic effect. When the electrolyte seawater enters the seawater channel 111a, a unidirectional current perpendicular to the magnetic field generated by the superconducting coils 113 is formed between the seawater and the electrodes 112. Under the action of the magnetic field generated by the superconducting coils 113, the seawater as a conductive medium will move in the same direction as the axis of the seawater channel 111a according to the Lorentz theorem, thereby generating an axial force. The reaction force generated by the axial force pushes the device forward. When the device needs to turn, in the reversing transmission module 300, the rotary motor and the bearing rotor 324 and the motor stator 323 will generate relative horizontal rotational motion. The rotary motor and the bearing rotor 324 are directly connected to the transmission shaft 310. The transmission shaft 310 is connected to the connecting member 332 and has no relative motion. The top of the second fairing 222 is tightly connected to the connecting member 332, thereby driving the device to rotate and complete the reversal.

[0045] In addition, the present invention also provides a clover-shaped superconducting magnetohydrodynamic propulsion system, which includes at least one superconducting magnetohydrodynamic propulsor described in the above technical solution, and a matching power supply device and cooling device.

[0046] In summary, the clover-shaped superconducting magnetohydrodynamic thruster and propulsion system provided by the present invention improves the propulsion efficiency of the superconducting magnetohydrodynamic thruster while ensuring quiet performance, and ensures navigation efficiency and safety through the cooperation of a series of intelligent devices.

[0047] The specific embodiments of the present invention described above do not limit the scope of protection of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A clover-shaped superconducting magnetohydrodynamic thruster, characterized in that: include: A thrust generating module comprising at least two superconducting coil assemblies and a protective shell, wherein the plurality of superconducting coil assemblies are rotatably connected to the interior of the protective shell, and each superconducting coil assembly forms a seawater channel, wherein the cross-sectional area of the seawater channel gradually decreases from its inlet end to its outlet end; a flow guide module, the flow guide module being wrapped around the outside of the protective shell and being streamlined from the inlet end to the outlet end of the seawater channel; The reversing transmission module is fixedly connected to the flow guide module and is used to realize free steering of the propeller.

2. The cloverleaf-shaped superconducting magnetohydrodynamic thruster according to claim 1, characterized in that: The thrust generating module includes three superconducting coil assemblies, which are overlapped in a spiral clover shape and are tightly arranged on the central axis inside the protective shell. The outer sides of the three superconducting coil assemblies are respectively tangent to the inner wall of the protective shell.

3. The clover-shaped superconducting magnetic fluid thruster according to claim 2, characterized in that: Each superconducting coil assembly includes a pipe, an electrode, and a superconducting coil. The inner cavity of the pipe forms the seawater channel. The two ends of the pipe respectively form the inlet end and the outlet end. The inlet end, the seawater channel, and the outlet end are connected in sequence. The electrodes are arranged in the pipe and symmetrically along the central axis of the pipe. The superconducting coils are spirally distributed outside the pipe.

4. The cloverleaf-shaped superconducting magnetohydrodynamic thruster according to claim 3, characterized in that: Each of the superconducting coil assemblies further includes a liquid helium container, which is wrapped around the outside of the superconducting coil. The gap between the liquid helium container and the pipeline is filled with liquid helium to provide a low-temperature environment for the superconducting coil.

5. The cloverleaf-shaped superconducting magnetohydrodynamic thruster according to claim 1, characterized in that: The guide module includes a guide vane assembly and a rectifying assembly. The rectifying assembly is wrapped around the outside of the protective shell. The guide vane assembly is arranged on one side of the rectifying assembly at the inlet end of the seawater channel and is fixedly connected to the rectifying assembly.

6. The cloverleaf-shaped superconducting magnetic fluid thruster according to claim 5, characterized in that: The guide vane assembly includes a rotating electrode, blades and a shell. One end of the rotating electrode is fixedly connected to the superconducting coil assembly. Multiple blades are evenly arranged around the rotating electrode at a certain angle and one end is fixedly connected to the rotating electrode. The shell wraps around the outside of the multiple blades and one end is fixedly connected to the rectifier assembly.

7. The cloverleaf-shaped superconducting magnetic fluid thruster according to claim 1, characterized in that: The reversing transmission module includes a transmission shaft, a rotating assembly and a housing assembly. The transmission shaft is connected to the rotating assembly so that the transmission shaft and the rotating assembly rotate synchronously. The transmission shaft and the rotating assembly are arranged inside the housing assembly, and the transmission shaft is fixedly connected to the flow guide module.

8. The cloverleaf-shaped superconducting magnetic fluid thruster according to claim 7, characterized in that: The rotary assembly includes a stator bracket, a bearing stator, a motor stator, a rotary motor and a bearing rotor, wherein the stator bracket is sleeved on the outside of the transmission shaft, the motor stator is fixed on the stator bracket and sleeved on the side of the transmission shaft away from the transmission end, the rotary motor and the bearing rotor are in transmission connection with the transmission shaft, and the bearing stator is fixed on the rotary motor and the bearing rotor and sleeved on the side of the transmission shaft away from the transmission end; The housing assembly includes a support shell and a connecting piece. The connecting piece is sleeved on the outside of the transmission shaft and has no relative movement with the transmission shaft. The bottom of the connecting piece is fixedly connected to the flow guide module, and the support shell is wrapped around the outside of the rotating assembly.

9. The cloverleaf-shaped superconducting magnetic fluid thruster according to claim 1, characterized in that: The system further includes a control module, wherein the control module includes: Safety protection module, used to ensure safe operation of ships; Information collection module, used to obtain ship data information; The motion control module is used to control the magnetic field, electric field strength and the direction of thruster injection.

10. A clover-shaped superconducting magnetohydrodynamic propulsion system, characterized in that: The invention comprises at least one superconducting magnetofluid propulsor according to any one of claims 1 to 9, and a matching power supply device and cooling device.

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