A magnetic oxygen-enriched liquid hydrogen superconducting motor drive system

Abstract

This invention discloses a liquid hydrogen superconducting motor drive system with magnetic enrichment and oxygen enrichment, belonging to the field of new energy power technology. It aims to solve the problems of insufficient utilization of liquid hydrogen cooling energy and large energy loss in existing high-temperature superconducting motor systems. The system includes a liquid hydrogen supply module and a superconducting motor module connected to the liquid hydrogen supply module. The superconducting motor module is connected to a fuel cell module. The superconducting motor module includes a superconducting motor, which includes a hollow iron core and a magnetic enrichment and oxygen enrichment device mounted on the main shaft of the superconducting motor. A rotor superconducting winding is located on the outer edge of the hollow iron core, and a cooling channel is located on the outer edge of the rotor superconducting winding, communicating with the hollow iron core. This magnetic enrichment and oxygen enrichment liquid hydrogen superconducting motor drive system of the present invention can realize the cascade utilization of liquid hydrogen cooling energy and the utilization of leakage magnetic flux at the end of the superconducting motor, significantly improving the enrichment efficiency.

Description

Technical Field

[0001] This invention relates to the field of new energy power technology, specifically to a liquid hydrogen superconducting motor drive system with magnetic oxygen enrichment. Background Technology

[0002] Liquid hydrogen, with its high energy density and zero carbon emissions, has become a promising zero-carbon fuel for high-power, long-range driving scenarios. Compared with traditional asynchronous motors and permanent magnet motors, high-temperature superconducting motors have significant advantages in terms of higher power density and substantial reduction in size and weight. The combination of superconducting motors and hydrogen fuel cells is the core technology route for the next generation of high-end zero-carbon power systems.

[0003] Currently, the research and application of integrated power systems combining superconducting motors and hydrogen fuel cells are still in the stage of independent subsystem design and simple assembly. Liquid hydrogen contains high-grade cryogenic cooling energy during vaporization. In existing technologies, most liquid hydrogen fuel cell systems only use liquid hydrogen as the reaction fuel, and its vaporization cooling energy is mostly vented directly through an ambient temperature vaporizer, or only a single-stage, low-grade cooling energy recovery is achieved. The superconducting windings of high-temperature superconducting motors need to be maintained in a cryogenic temperature range of 20K-77K to maintain the superconducting state. Existing superconducting motors generally use independent GM refrigerators, Stirling refrigerators, or cryogenic working fluid circulation systems. These refrigeration systems not only increase the system's volume, weight, and energy consumption, but also significantly increase system complexity and failure risk. Even in the few existing solutions that attempt to cool superconducting windings with liquid hydrogen, such as the Chinese patent with publication number CN121697828A, only single-stage cooling is achieved. The cooling capacity of the low-temperature hydrogen is not further utilized in a cascade manner, and it cannot be coordinated with the thermal management and intake pretreatment of the fuel cell. As a result, it is difficult to break through the bottleneck in the overall energy utilization efficiency of the system.

[0004] Furthermore, the electrochemical reaction rate and limiting current density of proton exchange membrane fuel cells are significantly positively correlated with the inlet oxygen concentration. Oxygen-enriched inlet gas can significantly reduce cathode concentration polarization, improve fuel cell power generation efficiency and power density, and optimize system dynamic response characteristics. Existing proton exchange membrane fuel cells are limited by cost, efficiency, and application scenarios, and typically use air directly as the cathode oxidant, which restricts the performance of the superconducting motor. Summary of the Invention

[0005] This invention solves the problems of insufficient utilization of liquid hydrogen cooling capacity and large energy loss in existing high-temperature superconducting motor systems. It proposes a liquid hydrogen superconducting motor drive system with magnetic enrichment and oxygen enrichment, which realizes the cascade utilization of liquid hydrogen cooling energy and the utilization of leakage magnetic flux at the end of the superconducting motor, and significantly improves enrichment efficiency.

[0006] To achieve the above objectives, the present invention adopts the following technical solution.

[0007] A liquid hydrogen superconducting motor drive system with magnetic enrichment and oxygen enrichment includes a liquid hydrogen supply module and a superconducting motor module connected to the liquid hydrogen supply module. The superconducting motor module is connected to a fuel cell module. The superconducting motor module includes a superconducting motor, which includes a hollow iron core and a magnetic enrichment and oxygen enrichment device disposed on the main shaft of the superconducting motor. The outer edge of the hollow iron core is provided with a rotor superconducting winding, and the outer edge of the rotor superconducting winding is provided with a cooling channel, which is connected to the hollow iron core.

[0008] This technical solution mainly includes a liquid hydrogen supply module, a superconducting motor module, and a fuel cell module. The liquid hydrogen supply module mainly supplies liquid hydrogen to the entire system, while the superconducting motor module provides power through the fuel cell. This technical solution can achieve precise gradient utilization of liquid hydrogen cooling capacity. Through the dual cooling enhancement of liquid hydrogen cooling capacity pre-cooling and low-temperature environment secondary cooling, the paramagnetic susceptibility of oxygen molecules is improved. Combined with the high gradient magnetic field of the magnetically concentrated structure for directional convergence, the enrichment efficiency is significantly improved.

[0009] The present invention is further configured such that: the input end of the hollow iron core is provided with a sealing module, the sealing module includes a magnetic fluid sealing device and a hollow main shaft, the hollow main shaft is connected to the hollow iron core; the output end of the hollow iron core is provided with an iron core exhaust hole, the hollow iron core is connected to a cooling channel through the iron core exhaust hole.

[0010] In this technical solution, the magnetic fluid sealing device connects the liquid hydrogen pipeline of the liquid hydrogen supply module to the rotating hollow spindle; after passing through the magnetic fluid sealing device, the liquid hydrogen enters the interior of the hollow spindle, cools the spindle with latent heat, and then enters the hollow iron core through the spindle exhaust port.

[0011] The present invention is further configured such that: the magnetic enrichment device includes a ring base and a magnetic tooth array disposed on the outer edge of the ring base, the area between the magnetic teeth of the magnetic tooth array is an oxygen enrichment area, and the area between the top of the magnetic teeth and the outer shell of the magnetic enrichment device is a main air channel.

[0012] In this technical solution, the high gradient magnetic field region between the magnetic teeth is an oxygen enrichment region, where paramagnetic oxygen molecules are enriched under the action of Kelvin force.

[0013] The present invention is further configured such that: the magnetic oxygen enrichment device further includes an air inlet pipe and an exhaust pipe, the magnetic oxygen enrichment device is connected to the fuel cell module through the air inlet pipe and the exhaust pipe, the exhaust pipe includes an oxygen-deficient exhaust pipe and an oxygen-enriched exhaust pipe, the oxygen-deficient exhaust pipe is connected to the main air channel, and the oxygen-enriched exhaust pipe is connected to the oxygen enrichment zone.

[0014] In this technical solution, the oxygen-enriched exhaust pipe is led out from the oxygen enrichment zone of the magnetic oxygen enrichment device, and the oxygen-deficient exhaust pipe is led out from the main air duct at the other end of the magnetic oxygen enrichment device.

[0015] The present invention is further configured such that: the fuel cell module includes an air cooler 8, the air input end of the air cooler 8 is connected to a molecular sieve filter 7, the air output end of the air cooler 8 is connected to a magnetic oxygen enrichment device 66, the hydrogen input end of the air cooler 8 is connected to a cooling channel 64, and the hydrogen output end of the air cooler 8 is connected to the fuel cell 10.

[0016] In this technical solution, hydrogen gas passes through an air cooler to pre-cool the air.

[0017] The present invention is further configured such that: the fuel cell includes an internal cooling pipeline and a reaction module, one end of the cooling pipeline is connected to a hydrogen regulating valve, and the other end of the hydrogen regulating valve is connected to the reaction module.

[0018] In this technical solution, after the hydrogen precools the air, it enters the cooling pipe inside the fuel cell to absorb the reaction heat of the fuel cell.

[0019] The present invention is further configured such that: the output end of the fuel cell is connected to a regenerator, the input end of the regenerator is connected to the oxygen enrichment zone of the magnetic oxygen enrichment device, the output end of the regenerator is connected to an oxygen enrichment air regulating valve, and the oxygen enrichment air regulating valve is connected to the fuel cell.

[0020] The present invention is further configured such that: a stator winding is provided on the outer edge of the cooling channel, and the rotor superconducting winding and the magnetic enrichment and oxygen enrichment device are both provided inside the stator winding.

[0021] The present invention is further configured such that: the liquid hydrogen supply module includes a liquid hydrogen storage tank, the liquid hydrogen storage tank is connected to a shut-off valve, the shut-off valve is connected to a liquid hydrogen regulating valve, and the liquid hydrogen regulating valve is connected to a magnetohydrodynamic sealing device of the sealing module.

[0022] In this technical solution, after liquid hydrogen flows out of the liquid hydrogen storage tank, it passes through a shut-off valve and a liquid hydrogen regulating valve before entering the superconducting motor module.

[0023] The present invention is further configured such that: the magnetic teeth are made of a high magnetic permeability material, and the magnetic teeth can concentrate the leakage magnetic field between the stator and the rotor, forming a high gradient magnetic field between the magnetic teeth.

[0024] The present invention provides a liquid hydrogen superconducting motor drive system with magnetic oxygen enrichment, which can bring the following beneficial effects: 1. Utilize the leakage magnetic field of superconducting motors to enrich oxygen concentration and improve the efficiency of fuel cells. The harmful end leakage magnetic field / stray magnetic field that originally needed to be shielded by superconducting motors is transformed into a gradient magnetic field that enhances hydrogen-oxygen mixing through a magnetic focusing structure. No additional excitation device is required, and hydrogen-oxygen mixing efficiency is improved with zero additional energy consumption. 2. It adopts a full-ring layout coaxial with the superconducting motor, which perfectly fits the outer contour of the motor end, maximizes the use of leakage magnetic space, and does not increase the axial / radial volume of the system. 3. Fully utilize the cooling capacity of liquid hydrogen in a gradient manner, use high-grade low-temperature cooling capacity to cool the superconducting winding and maintain the superconducting state of the winding, use medium- and low-grade cooling capacity to pre-cool the air and cool the fuel cell; perform stepwise cooling of the air, improve the magnetic susceptibility of oxygen molecules based on Curie's law, and effectively improve oxygen enrichment efficiency. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of a liquid hydrogen superconducting motor drive system with magnetic oxygen enrichment according to the present invention.

[0026] Figure 2 This is a schematic diagram of a magnetically enriched oxygen device for a liquid hydrogen superconducting motor drive system according to the present invention.

[0027] Figure label: Liquid hydrogen storage tank 1, shut-off valve 2, liquid hydrogen regulating valve 3, magnetohydrodynamic sealing device 4, hollow spindle 5, superconducting motor 6, molecular sieve filter 7, air cooler 8, hydrogen regulating valve 9, fuel cell 10, oxygen-enriched air regulating valve 11, regenerator 12, spindle exhaust port 51, stator winding 61, rotor superconducting winding 62, hollow iron core 63, cooling channel 64, iron core exhaust port 65, magnetic oxygen enrichment device 66, magnetic tooth array 661, ring base 662, oxygen-deficient exhaust pipe 663, oxygen-enriched exhaust pipe 664, air inlet pipe 665, oxygen enrichment zone 666, main air channel 667. Detailed Implementation

[0028] Example 1:

[0029] In high-temperature superconducting motor systems, liquid hydrogen cooling is typically only used to cool the superconducting windings, resulting in insufficient cooling capacity and significant energy loss. Leakage / stray magnetic fields at the superconducting motor ends are generally considered harmful interference and require shielding, thus this magnetic field resource is not fully utilized. The fuel cell and superconducting motor are independent subsystems, and the lack of deep coordination between the two subsystems in terms of energy, medium, and operating conditions leads to slow overall dynamic response, low overall efficiency, and insufficient power density. To address these shortcomings, this embodiment proposes a liquid hydrogen superconducting motor drive system with magnetic enrichment and oxygen enrichment, referencing... Figure 1 and Figure 2It mainly includes a liquid hydrogen supply module, a superconducting motor module, and a fuel cell module. The liquid hydrogen supply module is connected to the superconducting motor module, and the superconducting motor module is connected to the fuel cell module. The superconducting motor module includes a superconducting motor 6, which includes a hollow iron core 63 and a magnetic enrichment device 66. The magnetic enrichment device 66 is mounted on the main shaft of the superconducting motor 6. The outer edge of the hollow iron core 63 is provided with a rotor superconducting winding 62, and the outer edge of the rotor superconducting winding 62 is provided with a cooling channel 64, which is connected to the hollow iron core 63.

[0030] refer to Figure 1 The input end of the hollow iron core 63 is equipped with a sealing module, which includes a magnetic fluid sealing device 4 and a hollow spindle 5. The hollow spindle 5 is connected to the hollow iron core 63. The output end of the hollow iron core 63 is equipped with an iron core exhaust hole 65, which connects the hollow iron core 63 to the cooling channel 64.

[0031] Furthermore, a spindle vent 51 is provided at one end of the hollow spindle 5 near the hollow iron core 63, through which the hollow spindle 5 enters the hollow iron core 63.

[0032] In this technical solution, the magnetic fluid sealing device 4 connects the liquid hydrogen pipeline of the liquid hydrogen supply module and the rotating hollow spindle 5; after passing through the magnetic fluid sealing device 4, the liquid hydrogen enters the interior of the hollow spindle 5, cools the spindle with latent heat, and then enters the hollow iron core 63 through the spindle exhaust port 51.

[0033] The outer edge of the cooling channel 64 is also provided with a stator winding 61, and the rotor superconducting winding 62 and the magnetic enrichment and oxygen enrichment device 66 are both located inside the stator winding 61.

[0034] In this embodiment, the superconducting motor module includes a magnetohydrodynamic sealing device 4, a hollow spindle 5, and a superconducting motor 6; the superconducting motor 6 includes a stator winding 61, a rotor superconducting winding 62, a hollow iron core 63, a cooling channel 64, an iron core exhaust hole 65, and a magnetic enrichment and oxygen enrichment device 66.

[0035] refer to Figure 1 and Figure 2 The magnetic oxygen enrichment device 66 includes a ring base 662 and a magnetic tooth array 661. The magnetic tooth array 661 is disposed on the outer edge of the ring base 662. The area between the magnetic teeth of the magnetic tooth array 661 is the oxygen enrichment area 666. The area between the top of the magnetic teeth and the outer shell of the magnetic oxygen enrichment device 66 is the main air flow channel 667.

[0036] The magnetic oxygen enrichment device 66 also includes an intake pipe 665 and an exhaust pipe. The magnetic oxygen enrichment device 66 is connected to the fuel cell module through the intake pipe 665 and the exhaust pipe. The exhaust pipe includes an oxygen-deficient exhaust pipe 663 and an oxygen-enriched exhaust pipe 664. The oxygen-deficient exhaust pipe 663 is connected to the main air channel 667, and the oxygen-enriched exhaust pipe 664 is connected to the oxygen enrichment zone 666.

[0037] The high gradient magnetic field region between the magnetic teeth is an oxygen enrichment region, where paramagnetic oxygen molecules are enriched under the action of Kelvin force.

[0038] In this technical solution, the magnetic oxygen enrichment device 66 adopts a coaxial ring-nested structure, with a circumferential magnetic tooth array 661 inside, which directs the originally divergent and disordered leakage magnetic field at the end of the superconducting motor into a high-gradient magnetic field required to capture oxygen molecules. The oxygen-enriched exhaust pipe 664 is led out from the oxygen enrichment region 666 of the magnetic oxygen enrichment device 66, and the oxygen-deficient exhaust pipe 663 is led out from the main air channel 667 at the other end of the magnetic oxygen enrichment device 66.

[0039] The magnetic teeth are made of a high-permeability material. They can concentrate the leakage magnetic field between the stator and the rotor, and form a high-gradient magnetic field between the magnetic teeth.

[0040] The fuel cell module includes an air cooler 8, an air inlet connected to a molecular sieve filter 7, an air outlet connected to a magnetic oxygen enrichment device 66, a hydrogen inlet connected to a cooling channel 64, and a hydrogen outlet connected to a fuel cell 10.

[0041] The fuel cell 10 includes an internal cooling pipeline and a reaction module. One end of the cooling pipeline is connected to a hydrogen regulating valve 9, and the other end of the hydrogen regulating valve 9 is connected to the reaction module.

[0042] In this technical solution, hydrogen passes through air cooler 8 to pre-cool the air; after the air pre-cooling is completed, hydrogen enters the cooling pipe inside fuel cell 10 to absorb the reaction heat of fuel cell.

[0043] The output end of the fuel cell 10 is connected to the regenerator 12, the input end of the regenerator 12 is connected to the oxygen enrichment zone 666 of the magnetic oxygen enrichment device 66, the output end of the regenerator 12 is connected to the oxygen enrichment air regulating valve 11, and the oxygen enrichment air regulating valve 11 is connected to the fuel cell 10.

[0044] The fuel cell module includes a molecular sieve filter 7, an air cooler 8, a hydrogen regulating valve 9, a fuel cell 10, an oxygen-enriched air regulating valve 11, and a regenerator 12. Hydrogen passes through the air cooler 8 to pre-cool the air, and then enters the cooling pipes inside the fuel cell 10 to absorb the reaction heat of the fuel cell 10. Finally, after the hydrogen is warmed to room temperature, it flows through the hydrogen regulating valve 9 into the fuel cell 10 to participate in the reaction. The hydrogen regulating valve 9 can regulate the hydrogen supply to the fuel cell 10.

[0045] The liquid hydrogen supply module includes a liquid hydrogen storage tank 1, a shut-off valve 2, and a liquid hydrogen regulating valve 3. The liquid hydrogen storage tank 1 is connected to the shut-off valve 2, the shut-off valve 2 is connected to the liquid hydrogen regulating valve 3, and the liquid hydrogen regulating valve 3 is connected to the magnetohydrodynamic sealing device 4 of the sealing module.

[0046] In this technical solution, after liquid hydrogen flows out from liquid hydrogen storage tank 1, it passes through shut-off valve 2 and liquid hydrogen regulating valve 3 and enters superconducting motor module.

[0047] Through the above technical solution, the present invention can realize the resource utilization of leakage magnetic field / stray magnetic field at the end of superconducting motor, and convert the leakage magnetic field / stray magnetic field at the end of superconducting motor into a high gradient magnetic field required for magnetic oxygen enrichment. No additional excitation device is required, and oxygen enrichment of air is achieved with zero additional energy consumption, thereby simultaneously improving the reaction efficiency and output performance of fuel cell.

[0048] This invention enables precise gradient utilization of liquid hydrogen cooling capacity. High-grade, low-temperature cooling capacity is preferentially used for deep cooling of the superconducting motor spindle, core, and rotor superconducting windings to ensure stable operation of the windings in the superconducting state. Medium- and low-grade cooling capacity is used sequentially for air precooling and fuel cell cooling.

[0049] The technical solution of this invention can also solve the problems of low paramagnetic susceptibility of oxygen molecules, limited oxygen enrichment efficiency, and poor integration with the power system in existing magnetic oxygen enrichment technology at room temperature. By enhancing the temperature through pre-cooling with liquid hydrogen and secondary cooling in a low-temperature environment, the paramagnetic susceptibility of oxygen molecules is improved. Combined with the high gradient magnetic field of the magnetic focusing structure for directional convergence, the oxygen enrichment efficiency is improved. The invention adopts a fully annular nested layout coaxial with the superconducting motor, which fits the outer contour of the motor end without adding extra axial / radial volume to the system, thus achieving a high degree of integration between the superconducting motor and the magnetic oxygen enrichment device.

[0050] The working principle of the liquid hydrogen superconducting motor drive system with magnetic oxygen enrichment in this embodiment includes the following process.

[0051] refer to Figure 1In the liquid hydrogen supply module, the liquid hydrogen supplied by the liquid hydrogen storage tank 1 first flows through the hollow main shaft 5 and the hollow iron core 63, cooling the main shaft and iron core of the superconducting motor 6 through latent heat. After vaporization, the low-temperature hydrogen enters the cooling channel 64 through the iron core exhaust port 65, continuing to cool the rotor superconducting winding 62 and acting as a low-temperature cold shield. Through the heat conduction of the hollow iron core 5 and the cooling of the low-temperature hydrogen in the cooling channel 64, the rotor superconducting winding 62 is maintained in a superconducting state. Subsequently, the hydrogen flows out of the superconducting motor 6, passing through the air cooler 8 and the fuel cell 10 in sequence to utilize the cooling capacity, and finally reheats to room temperature before entering the fuel cell 10.

[0052] refer to Figure 1 and Figure 2 Air is pre-cooled by air cooler 8, significantly increasing the paramagnetic susceptibility of oxygen in the air. Then, the air enters the magnetic enrichment device 66 through a pre-set inlet pipe 665. Air enters from one end of the magnetic enrichment device 66 through the inlet pipe 665 and continuously enriches oxygen along the main airflow channel 667. The space between the magnetic teeth forms the oxygen enrichment zone 666. The magnetic teeth are made of a high-permeability material (in this embodiment, high-nickel permalloy or nanocrystalline soft magnetic alloy can be used, but it is not limited to these materials). A high-gradient magnetic field is formed between the magnetic teeth, and paramagnetic oxygen molecules are enriched in this region under the action of Kelvin force. Air continuously enriches oxygen in the oxygen enrichment zone 666, and finally, oxygen-enriched air flows out from the oxygen-enriched exhaust pipe 664, while oxygen-deficient air flows out from the oxygen-deficient exhaust pipe 663. The magnetic enrichment device 66 is located in a low-temperature zone, and the air flowing inside further reduces the temperature, increasing the paramagnetic susceptibility of oxygen molecules and improving oxygen enrichment efficiency.

[0053] Oxygen-enriched air flows out from the oxygen-enriched exhaust pipe 664, is reheated by the regenerator 12, and then enters the fuel cell 10 to participate in the reaction. The heat source for the reheater 12 is the high-temperature exhaust gas from the cathode of the fuel cell 10.

[0054] The technical solution of this embodiment mainly includes the following innovations: utilization of liquid hydrogen cooling gradient, utilization of superconducting motor end leakage magnetic field, innovative design of magnetic focusing structure, and low temperature method to improve enrichment efficiency.

[0055] 1. Liquid hydrogen cooling gradient utilization: The superconducting motor is equipped with a hollow spindle, a hollow iron core, and a rotor superconducting winding. The inner cavity of the hollow spindle and the hollow iron core are connected to form the first cooling flow path for liquid hydrogen. The hollow iron core has an exhaust port connected to the inner cavity. The exhaust port is connected to the cooling channel on the outside of the rotor superconducting winding to form the second cooling flow path for hydrogen. After the liquid hydrogen cools the spindle and iron core through the first cooling flow path, it vaporizes. The low-temperature hydrogen cools the rotor superconducting winding through the second cooling flow path and forms a low-temperature cold screen. The hydrogen flowing out of the superconducting motor passes through an air cooler and a fuel cell in sequence to complete the cooling gradient release before entering the anode of the fuel cell to participate in the electrochemical reaction.

[0056] 2. Utilization of leakage magnetic field at the end of superconducting motor: The magnetic enrichment device is equipped with a circumferentially arranged array of magnetic teeth. The magnetic teeth are made of high magnetic permeability material. The magnetic teeth form an oxygen enrichment area and a high gradient magnetic field, which can capture paramagnetic oxygen molecules. The magnetic enrichment device is located in the leakage magnetic field area at the end of the superconducting motor, which can directionally converge the divergent and disordered leakage magnetic field at the end of the superconducting motor into the high gradient magnetic field required for oxygen enrichment.

[0057] 3. Innovative design of magnetic focusing structure: It adopts a ring-shaped nested layout coaxial with the superconducting motor, which fits the outline of the motor end, without the need to increase the axial / radial volume of the system, thus achieving a high degree of integration between the superconducting motor and the oxygen enrichment device.

[0058] 4. Low-temperature method to improve enrichment efficiency: The air is pre-cooled with low-temperature hydrogen. The pre-cooled air enters a magnetic oxygen enrichment device coaxially nested with the end of the superconducting motor for further cooling. The dual cooling effect of pre-cooling with liquid hydrogen and secondary cooling in a low-temperature environment enhances the paramagnetic susceptibility of oxygen molecules and improves oxygen enrichment efficiency.

[0059] Example 2:

[0060] This embodiment proposes a liquid hydrogen superconducting motor drive system with magnetic enrichment and oxygen enrichment, including a liquid hydrogen supply module, a superconducting motor module, and a fuel cell module. The liquid hydrogen supply module is connected to the superconducting motor module, and the superconducting motor module is connected to the fuel cell module. The superconducting motor module includes a superconducting motor 6, which includes a hollow iron core 63 and a magnetic enrichment and oxygen enrichment device 66. The magnetic enrichment and oxygen enrichment device 66 is mounted on the main shaft of the superconducting motor 6. A rotor superconducting winding 62 is provided on the outer edge of the hollow iron core 63, and a cooling channel 64 is provided on the outer edge of the rotor superconducting winding 62. The cooling channel 64 is connected to the hollow iron core 63.

[0061] refer to Figure 1 The input end of the hollow iron core 63 is equipped with a sealing module, which includes a magnetic fluid sealing device 4 and a hollow spindle 5. The hollow spindle 5 is connected to the hollow iron core 63. The output end of the hollow iron core 63 is equipped with an iron core exhaust hole 65, which connects the hollow iron core 63 to the cooling channel 64.

[0062] Furthermore, a spindle vent 51 is provided at one end of the hollow spindle 5 near the hollow iron core 63, through which the hollow spindle 5 enters the hollow iron core 63.

[0063] The magnetic fluid sealing device 4 connects the liquid hydrogen pipeline of the liquid hydrogen supply module to the rotating hollow spindle 5; after passing through the magnetic fluid sealing device 4, the liquid hydrogen enters the interior of the hollow spindle 5, cools the spindle with latent heat, and then enters the hollow iron core 63 through the spindle exhaust port 51.

[0064] The outer edge of the cooling channel 64 is also provided with a stator winding 61, and the rotor superconducting winding 62 and the magnetic enrichment and oxygen enrichment device 66 are both located inside the stator winding 61.

[0065] refer to Figure 1 and Figure 2 The magnetic oxygen enrichment device 66 includes a ring base 662 and a magnetic tooth array 661. The magnetic tooth array 661 is disposed on the outer edge of the ring base 662. The area between the magnetic teeth of the magnetic tooth array 661 is the oxygen enrichment area 666. The area between the top of the magnetic teeth and the outer shell of the magnetic oxygen enrichment device 66 is the main air flow channel 667.

[0066] The magnetic oxygen enrichment device 66 also includes an intake pipe 665 and an exhaust pipe. The magnetic oxygen enrichment device 66 is connected to the fuel cell module through the intake pipe 665 and the exhaust pipe. The exhaust pipe includes an oxygen-deficient exhaust pipe 663 and an oxygen-enriched exhaust pipe 664. The oxygen-deficient exhaust pipe 663 is connected to the main air channel 667, and the oxygen-enriched exhaust pipe 664 is connected to the oxygen enrichment zone 666.

[0067] The high gradient magnetic field region between the magnetic teeth is an oxygen enrichment region, where paramagnetic oxygen molecules are enriched under the action of Kelvin force.

[0068] The magnetic oxygen enrichment device 66 adopts a coaxial ring-nested structure, with a circumferential magnetic tooth array 661 inside, which directs and converges the originally divergent and disordered leakage magnetic field at the end of the superconducting motor into a high-gradient magnetic field required to capture oxygen molecules. The oxygen-enriched exhaust pipe 664 is led out from the oxygen enrichment region 666 of the magnetic oxygen enrichment device 66, and the oxygen-deficient exhaust pipe 663 is led out from the main air channel 667 at the other end of the magnetic oxygen enrichment device 66.

[0069] The magnetic teeth are made of a high-permeability material. They can concentrate the leakage magnetic field between the stator and the rotor, and form a high-gradient magnetic field between the magnetic teeth.

[0070] The fuel cell module includes an air cooler 8, an air inlet connected to a molecular sieve filter 7, an air outlet connected to a magnetic oxygen enrichment device 66, a hydrogen inlet connected to a cooling channel 64, and a hydrogen outlet connected to a fuel cell 10.

[0071] The fuel cell 10 includes an internal cooling pipeline and a reaction module. One end of the cooling pipeline is connected to a hydrogen regulating valve 9, and the other end of the hydrogen regulating valve 9 is connected to the reaction module.

[0072] Hydrogen gas passes through air cooler 8 to pre-cool the air; after pre-cooling, hydrogen gas enters the cooling pipes inside fuel cell 10 to absorb the reaction heat of fuel cell.

[0073] The output end of the fuel cell 10 is connected to the regenerator 12, the input end of the regenerator 12 is connected to the oxygen enrichment zone 666 of the magnetic oxygen enrichment device 66, the output end of the regenerator 12 is connected to the oxygen enrichment air regulating valve 11, and the oxygen enrichment air regulating valve 11 is connected to the fuel cell 10.

[0074] The liquid hydrogen supply module includes a liquid hydrogen storage tank 1, a shut-off valve 2, and a liquid hydrogen regulating valve 3. The liquid hydrogen storage tank 1 is connected to the shut-off valve 2, the shut-off valve 2 is connected to the liquid hydrogen regulating valve 3, and the liquid hydrogen regulating valve 3 is connected to the magnetohydrodynamic sealing device 4 of the sealing module.

[0075] After liquid hydrogen flows out of liquid hydrogen storage tank 1, it passes through shut-off valve 2 and liquid hydrogen regulating valve 3 and enters the superconducting motor module.

[0076] Furthermore, a specific implementation method is proposed for the technical solution of Embodiment 1.

[0077] refer to Figure 1 The liquid hydrogen superconducting motor drive system of this embodiment consists of a liquid hydrogen supply module, a superconducting motor module and a fuel cell module.

[0078] The liquid hydrogen supply module includes a liquid hydrogen storage tank 1, a shut-off valve 2, and a liquid hydrogen regulating valve 3 connected in sequence. The shut-off valve 2 controls the opening and closing of the liquid hydrogen supply process, and the liquid hydrogen regulating valve 3 regulates the liquid hydrogen supply flow rate. After the liquid hydrogen flows out of the liquid hydrogen storage tank 1, it passes through the shut-off valve 2 and the liquid hydrogen regulating valve 3 and enters the superconducting motor module.

[0079] The superconducting motor module mainly includes a sealing module and a superconducting motor 6. The sealing module consists of a magnetic fluid sealing device 4 and a hollow spindle 5. In this embodiment, the superconducting motor 6 consists of a stator winding 61, a rotor superconducting winding 62, a hollow iron core 63, a cooling channel 64, an iron core exhaust hole 65, and a magnetic enrichment and oxygen enrichment device 66.

[0080] Liquid hydrogen enters the hollow spindle 5 through the magnetohydrodynamic sealing device 4, where it cools the spindle using latent heat. It then enters the hollow iron core 63 through the spindle exhaust port 51. The liquid hydrogen fully vaporizes within the hollow iron core 63, and its cooling capacity cools both the core and the superconducting rotor winding 62 wound around it. Simultaneously, the low-temperature hydrogen acts as a cooling shield, absorbing heat leakage from the externally guiding rotor superconducting winding 62. The vaporized low-temperature hydrogen flows out from the iron core exhaust port 65 and continues to cool the rotor superconducting winding 62 through the cooling channel 64. Through the heat conduction of the hollow iron core 63 and the convective heat transfer of the low-temperature hydrogen, the rotor superconducting winding 62 cools to a superconducting state. The hydrogen then exits from the cooling channel 64 of the superconducting motor 6 and enters the air cooler 8.

[0081] The fuel cell module consists of a molecular sieve filter 7, an air cooler 8, a hydrogen regulating valve 9, a fuel cell 10, an oxygen-enriched air regulating valve 11, and a regenerator 12.

[0082] The air entering the fuel cell 10 to participate in the reaction is obtained from the external environment; the external air first passes through the molecular sieve filter 7 to remove moisture and impurities. The air is initially pre-cooled in the air cooler 8, and after pre-cooling, it enters the magnetic oxygen enrichment device 66 in the superconducting motor 6 through the air inlet pipe 665, where the temperature is further reduced.

[0083] The magnetic oxygen enrichment device 66 is nested in a ring on the main shaft of the superconducting motor 6 inside the superconducting motor 6. Within the magnetic oxygen enrichment device 66, a high-gradient magnetic field is used to enrich oxygen molecules in the air. The magnetic oxygen enrichment device 66 consists of a magnetic tooth array 661, a ring base 662, an oxygen-deficient exhaust pipe 663, an oxygen-enriched exhaust pipe 664, and an air inlet pipe 665. In this embodiment, the magnetic teeth are welded to the ring base 662 in a ring array. The magnetic teeth are made of high-nickel permalloy or nanocrystalline soft magnetic alloy material, which concentrates the leakage magnetic field between the stator and rotor, forming a high-gradient magnetic field between the magnetic teeth. The high-gradient magnetic field region between the magnetic teeth is the oxygen enrichment region 666, where paramagnetic oxygen molecules are enriched under the action of Kelvin force. After air enters the magnetic oxygen enrichment device 66, it flows in a ring along the main airflow channel 667. The oxygen content of the air flowing through the oxygen enrichment region 666 continuously increases, while the oxygen content of the air in the main airflow channel 667 continuously decreases. Oxygen-enriched air flows out from oxygen-enriched exhaust pipe 664, which is led out from the oxygen enrichment zone 666 of the magnetic oxygen enrichment device 66. Oxygen-deficient air flows out from oxygen-deficient exhaust pipe 663, which is led out from the main airflow channel 667 at the other end of the magnetic oxygen enrichment device 66. As the air flows through the air cooler 8 and the magnetic oxygen enrichment device 66, the temperature continuously decreases, increasing the paramagnetic susceptibility of oxygen molecules in the air and improving the oxygen enrichment efficiency.

[0084] Oxygen-enriched air passes through the regenerator 12, where it exchanges heat with the high-temperature exhaust gas from the fuel cell 10 to reheat. Then, it passes through the oxygen-enriched air regulating valve 11 before entering the fuel cell 10 to participate in the reaction. The function of the oxygen-enriched air regulating valve 11 is to regulate the oxygen supply to the fuel cell 10.

Claims

1. A liquid hydrogen superconducting motor drive system with magnetic oxygen enrichment, characterized in that, It includes a liquid hydrogen supply module and a superconducting motor module connected to the liquid hydrogen supply module. The superconducting motor module is connected to a fuel cell module. The superconducting motor module includes a superconducting motor (6). The superconducting motor (6) includes a hollow iron core (63) and a magnetic enrichment oxygen device (66) set on the main shaft of the superconducting motor (6). The outer edge of the hollow iron core (63) is provided with a rotor superconducting winding (62). The outer edge of the rotor superconducting winding (62) is provided with a cooling channel (64). The cooling channel (64) is connected to the hollow iron core (63). The magnetic oxygen enrichment device (66) includes a ring base (662) and a magnetic tooth array (661) disposed on the outer edge of the ring base (662). The area between the magnetic teeth of the magnetic tooth array (661) is the oxygen enrichment area (666), and the area between the top of the magnetic teeth and the outer shell of the magnetic oxygen enrichment device (66) is the main air flow channel (667).

2. The liquid hydrogen superconducting motor drive system with magnetic oxygen enrichment according to claim 1, characterized in that, The hollow iron core (63) has a sealing module at its input end, which includes a magnetic fluid sealing device (4) and a hollow spindle (5). The hollow spindle (5) is connected to the hollow iron core (63). The hollow iron core (63) has an iron core exhaust hole (65) at its output end, and the hollow iron core (63) is connected to the cooling channel (64) through the iron core exhaust hole (65).

3. The liquid hydrogen superconducting motor drive system with magnetic oxygen enrichment according to claim 1, characterized in that, The magnetic enrichment device (66) further includes an intake pipe (665) and an exhaust pipe. The magnetic enrichment device (66) is connected to the fuel cell module through the intake pipe (665) and the exhaust pipe. The exhaust pipe includes an oxygen-deficient exhaust pipe (663) and an oxygen-enriched exhaust pipe (664). The oxygen-deficient exhaust pipe (663) is connected to the main air channel (667), and the oxygen-enriched exhaust pipe (664) is connected to the oxygen enrichment zone (666).

4. The liquid hydrogen superconducting motor drive system with magnetic oxygen enrichment according to claim 1, characterized in that, The fuel cell module includes an air cooler (8), the air input end of which is connected to a molecular sieve filter (7), the air output end of which is connected to a magnetic oxygen enrichment device (66), the hydrogen input end of which is connected to a cooling channel (64), and the hydrogen output end of which is connected to a fuel cell (10).

5. The liquid hydrogen superconducting motor drive system with magnetic oxygen enrichment according to claim 4, characterized in that, The fuel cell (10) includes an internal cooling pipeline and a reaction module. One end of the cooling pipeline is connected to a hydrogen regulating valve (9), and the other end of the hydrogen regulating valve (9) is connected to the reaction module.

6. The liquid hydrogen superconducting motor drive system with magnetic oxygen enrichment according to claim 5, characterized in that, The output end of the fuel cell (10) is connected to a regenerator (12), the input end of the regenerator (12) is connected to the oxygen enrichment zone (666) of the magnetic oxygen enrichment device (66), the output end of the regenerator (12) is connected to an oxygen enrichment air regulating valve (11), and the oxygen enrichment air regulating valve (11) is connected to the fuel cell (10).

7. A liquid hydrogen superconducting motor drive system with magnetic oxygen enrichment according to claim 1 or 2, characterized in that, The outer edge of the cooling channel (64) is also provided with a stator winding (61), and the rotor superconducting winding (62) and the magnetic enrichment device (66) are both located inside the stator winding (61).

8. The liquid hydrogen superconducting motor drive system with magnetic oxygen enrichment according to claim 2, characterized in that, The liquid hydrogen supply module includes a liquid hydrogen storage tank (1), the liquid hydrogen storage tank (1) is connected to a shut-off valve (2), the shut-off valve (2) is connected to a liquid hydrogen regulating valve (3), and the liquid hydrogen regulating valve (3) is connected to a magnetohydrodynamic sealing device (4) of the sealing module.

9. The liquid hydrogen superconducting motor drive system with magnetic oxygen enrichment according to claim 1, characterized in that, The magnetic teeth are made of a high-permeability material. They can concentrate the leakage magnetic field between the stator and the rotor, and form a high-gradient magnetic field between the magnetic teeth.

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