Nested magnetoelectric integrated reverse double-flywheel energy storage device

Abstract

The invention provides a nested magnetoelectric integrated reverse double-flywheel energy storage device, and relates to the technical field of flywheel energy storage, and the device comprises a housing assembly, a nested flywheel assembly, a magnetoelectric integrated supporting assembly, and an axial cooperative fault-tolerant assembly. An inner cylinder and an outer cylinder are coaxially arranged in the shell assembly, and an annular cooling cavity is formed between the inner cylinder and the outer cylinder and used for containing a phase change cooling medium. A gas-liquid separation cover is arranged at the top of the outer cylinder; a flow guide seat is arranged at the bottom of the inner cylinder; the nested flywheel assembly comprises an inner flywheel and an outer flywheel; the inner flywheel and the outer flywheel rotate in opposite directions; the magnetoelectric integrated supporting assembly comprises an integrated shaft and a magnetoelectric composite stator, and the integrated shaft is coaxially arranged in the inner cylinder in a penetrating mode; the magnetoelectric composite stator sleeves the middle part of the integrated shaft and is fixed on the inner wall of the inner cylinder through a bolt; the axial cooperative fault-tolerant assembly comprises an upper thrust disc, a lower thrust disc and a thrust magnetic ring. The integration level, the heat dissipation performance and the reliability of the double-flywheel energy storage device can be obviously improved, and the double-flywheel energy storage device has wide applicability.

Description

Technical Field

[0001] This invention relates to the field of flywheel energy storage technology, specifically to a nested magnetoelectric integrated reverse dual flywheel energy storage device. Background Technology

[0002] Flywheel energy storage devices have advantages such as long service life, high energy and power density, excellent charge and discharge efficiency, and strong environmental adaptability, and are increasingly widely used in new energy vehicles, rail transit, and other transportation fields. To solve the problem of gyroscopic torque generated by the vehicle's steering when a single flywheel rotates at high speed, the counter-rotating dual flywheel energy storage device uses two sets of flywheels rotating in opposite directions to counteract the gyroscopic torque and thus solve this problem.

[0003] However, existing reverse-rotor dual-flywheel energy storage devices have the following problems: First, the structural integration is limited to a shared support frame, and the drive motor and magnetic bearing are still independent components, resulting in excessively large axial dimensions, low device integration, and difficulty in adapting to miniaturized installation scenarios; Second, the heat dissipation components generally use external cooling modules or independent gas pressurization components for heat dissipation, which not only increases the number of components and energy loss, but also makes it difficult for the cooling medium to accurately act on the core heat-generating components of the motor stator and magnetic bearing, resulting in low cooling efficiency; Third, the radial and axial support systems are independently controlled, lacking a collaborative fault-tolerance mechanism, and a single bearing failure can easily cause rotor imbalance, affecting the overall reliability of the device.

[0004] Therefore, there is an urgent need for a nested magnetoelectric integrated reverse dual flywheel energy storage device. Summary of the Invention

[0005] To address the aforementioned issues, this invention proposes a nested magnetoelectric integrated reverse dual flywheel energy storage device, which solves the problems of low integration, poor heat dissipation performance, and poor reliability caused by the lack of a collaborative fault-tolerance mechanism in traditional dual flywheel devices.

[0006] This invention provides a nested magnetoelectric integrated reverse dual flywheel energy storage device, comprising: a housing assembly, a nested flywheel assembly, a magnetoelectric integrated support assembly, and an axial cooperative fault-tolerant assembly; The housing assembly has an inner cylinder and an outer cylinder coaxially arranged inside, and an annular cooling cavity is formed between the inner cylinder and the outer cylinder to accommodate the phase change cooling medium. The outer cylinder is provided with a gas-liquid separation cover at the top, and the inner cylinder is provided with a flow guide seat at the bottom; A heat insulation layer is provided on the outer side of the outer cylinder; The nested flywheel assembly includes an inner flywheel and an outer flywheel; The inner flywheel is coaxially sleeved on the inner side of the inner cylinder, and the outer flywheel is coaxially sleeved on the outer side of the inner cylinder and located in the annular cooling cavity; The inner flywheel rotates in the opposite direction to the outer flywheel; The magnetoelectric integrated support assembly includes an integrated shaft and a magnetoelectric composite stator; The integrated shaft is coaxially inserted inside the inner cylinder to provide support for axial components; The magnetoelectric composite stator is sleeved in the middle of the integrated shaft and fixed to the inner wall of the inner cylinder by bolts; The magnetoelectric composite stator includes a stator core, which integrates a drive winding and a suspension winding. The stator core is provided with axial auxiliary windings at both the upper and lower ends. The inner flywheel and the outer flywheel are both provided with rotor magnetic rings on their inner walls. The drive winding and the rotor magnetic ring cooperate to form a drive motor, and the suspension winding and the rotor magnetic ring cooperate to form a radial magnetic suspension bearing. The axial cooperative fault-tolerant component includes an upper thrust disk, a lower thrust disk, and a thrust magnetic ring; The upper thrust plate is located at the top of the integrated shaft, and the lower thrust plate is located at the bottom of the integrated shaft. The upper thrust plate and the lower thrust plate are permanent magnets with opposite polarities. An axial suspension gap is formed between the upper thrust plate, the lower thrust plate, and the thrust magnetic ring.

[0007] Preferably, the gas-liquid separation cover includes a cover plate body; The bottom of the cover plate body is provided with a condensation tank, the inner side of the condensation tank is provided with a guide cone, and the edge of the cover plate body is provided with a liquid return hole, which connects the condensation tank and the annular cooling chamber. The top surface of the flow guide seat is a conical structure, and the side of the flow guide seat is provided with flow equalization holes.

[0008] Preferably, both the inner flywheel and the outer flywheel adopt a composite structure of a metal hub and a composite material ring; The inner wall of the metal hub is provided with an annular boss, and the rotor magnetic ring is embedded in the annular boss.

[0009] The composite material ring is formed by a prestressed winding laser in-situ curing process.

[0010] Preferably, the stator core has multiple slots along the circumferential direction, and the drive winding and the suspension winding are embedded in the slots in a layered winding manner; the drive winding is located in the lower layer of the slots and extends along the axial direction of the stator core to generate a rotating magnetic field; the suspension winding is located in the upper layer of the slots and is distributed in a ring to generate a radial suspension force. The stator core is provided with cooling fins on its outer periphery that extend into the annular cooling cavity and come into contact with the phase change cooling medium.

[0011] Preferably, the drive winding includes an inner motor winding and an outer motor winding; The inner motor winding engages with the first rotor magnetic ring on the inner wall of the inner flywheel, and the outer motor winding engages with the second rotor magnetic ring on the inner wall of the outer flywheel, so as to drive the inner flywheel and the outer flywheel to rotate in opposite directions.

[0012] Preferably, the axial auxiliary winding includes an upper auxiliary winding disposed at the top of the stator core and a lower auxiliary winding disposed at the bottom of the stator core. The upper auxiliary winding is opposite to the first thrust magnetic ring of the inner flywheel, and the lower auxiliary winding is opposite to the second thrust magnetic ring of the outer flywheel. Both the upper auxiliary winding and the lower auxiliary winding are multi-phase coils; Both the first thrust magnetic ring at the top of the inner flywheel and the second thrust magnetic ring of the outer flywheel are permanent magnets.

[0013] Preferably, both the upper thrust plate and the lower thrust plate are provided with buffer pads on their outer periphery; The buffer pad is made of elastic and wear-resistant material, and the outer diameter of the buffer pad is larger than the inner diameter of the thrust magnetic ring.

[0014] Preferably, a thermally conductive pad is provided between the inner cylinder and the stator core, and the thermally conductive pad is made of graphite material.

[0015] Preferably, an electric heating element is provided at the bottom of the annular cooling chamber; A temperature sensor is installed inside the stator core; The electric heating element is electrically connected to the temperature sensor.

[0016] Preferably, the vacuum assembly includes a vacuum pump and a vacuum sensor; The vacuum pump is connected to the inner side of the inner cylinder and the annular cooling chamber via a pipe; The vacuum sensors are located at the top of the inner cylinder and the bottom of the outer cylinder.

[0017] Compared with traditional technologies, the beneficial effects of this invention are as follows: A nested magnetoelectric integrated reverse dual flywheel energy storage device achieves coaxial nesting of the inner and outer flywheels through the nested space formed by the inner and outer cylinders, reducing the radial space occupied. The magnetoelectric composite stator integrates the drive winding and suspension winding in the same stator core, allowing the drive motor and radial magnetic bearing to share the stator structure, avoiding the redundant structure of independent motor stator and bearing stator in traditional technologies, and improving the overall integration of the device. The phase change cooling medium in the annular cooling cavity directly absorbs the heat from the outer flywheel and the magnetoelectric composite stator, and condenses and refluxes through the gas-liquid separation cover. The guide seat ensures uniform distribution of the phase change cooling medium, forming passive and efficient heat dissipation, solving the problem of the need for heat dissipation in traditional technologies. The external cooling module suffers from low cooling efficiency. The upper and lower thrust plates use permanent magnets with opposite polarities in conjunction with the axial auxiliary winding. While achieving axial suspension, it also generates radial compensation force by adjusting the current of the corresponding axial auxiliary winding when a single radial bearing fails. This utilizes the magnetic field coupling effect to correct rotor imbalance and improve the fault tolerance of the device. This solves the problem of low reliability caused by rotor imbalance due to single bearing failure in traditional devices. As a result, the device has achieved significant improvements in integration, heat dissipation performance, and reliability. It is suitable for working scenarios with high installation space, energy storage efficiency, and operational reliability. Attached Figure Description

[0018] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0019] Figure 1 This is a schematic diagram of a nested magnetoelectric integrated reverse dual flywheel energy storage device. Figure 2 This is a schematic diagram of the cross-sectional structure of a magnetoelectric composite stator. Figure 3 This is a schematic diagram showing the fit between the nested flywheel assembly and the axially coordinated fault-tolerant assembly; Figure 4 This is a schematic diagram of the gas-liquid separator cover. Reference numerals: 1. Shell assembly; 2. Nested flywheel assembly; 3. Magnetoelectric integrated support assembly; 4. Axial cooperative fault-tolerant assembly; 11. Inner cylinder; 12. Outer cylinder; 13. Annular cooling chamber; 14. Gas-liquid separation cover; 15. Flow guide seat; 16. Heat insulation layer; 17. Vacuum assembly; 111. Positioning boss; 141. Cover plate body; 142. Condensation tank; 143. Flow guide cone; 144. Liquid return hole; 21. Inner flywheel; 22. Outer flywheel; 25. Rotor magnetic guide ring; 31. Integrated shaft; 32. Magnetoelectric composite stator; 321. Stator core; 322. Gear; 323. Cooling fins; 33. Drive winding; 34. Suspension winding; 43. Thrust magnetic ring; 44. Axial auxiliary winding; 45. Buffer pad; 5. Temperature sensor. Detailed Implementation

[0020] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0021] The following detailed description is exemplary and intended to provide further detailed explanation of the invention. Unless otherwise specified, all technical terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in this invention is for describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention.

[0022] Example 1: This invention provides a nested magnetoelectric integrated reverse dual flywheel energy storage device, referenced. Figure 1 , Figure 2 and Figure 3 It includes: housing assembly 1, nested flywheel assembly 2, magneto-electric integrated support assembly 3, and axial cooperative fault-tolerant assembly 4; An inner cylinder 11 and an outer cylinder 12 are coaxially arranged inside the housing assembly 1, and an annular cooling cavity 13 is formed between the inner cylinder 11 and the outer cylinder 12 to accommodate the phase change cooling medium. The outer cylinder 12 is provided with a gas-liquid separation cover 14 at the top, and the inner cylinder 11 is provided with a flow guide seat 15 at the bottom; A heat insulation layer 16 is provided on the outside of the outer cylinder 12; Nested flywheel assembly 2 includes an inner flywheel 21 and an outer flywheel 22; The inner flywheel 21 is coaxially sleeved inside the inner cylinder 11, and the outer flywheel 22 is coaxially sleeved outside the inner cylinder 11 and located inside the annular cooling chamber 13. The inner flywheel 21 and the outer flywheel 22 rotate in opposite directions; The magnetoelectric integrated support assembly 3 includes an integrated shaft 31 and a magnetoelectric composite stator 32; The integrated shaft 31 is coaxially inserted inside the inner cylinder 11 to provide support for the axial components; The magnetoelectric composite stator 32 is sleeved in the middle of the integrated shaft 31 and fixed to the inner wall of the inner cylinder 11 by bolts; The magnetoelectric composite stator 32 includes a stator core 321, in which a drive winding 33 and a suspension winding 34 are integrated. Axial auxiliary windings 44 are provided at both the upper and lower ends of the stator core 321. The inner walls of both the inner flywheel 21 and the outer flywheel 22 are provided with rotor magnetic rings 25. The drive winding 33 and the rotor magnetic rings 25 cooperate to form a drive motor. The suspension winding 34 and the rotor magnetic rings 25 cooperate to form a radial magnetic suspension bearing. Axial cooperative fault-tolerant component 4 includes an upper thrust disk, a lower thrust disk, and a thrust magnetic ring 43; The upper thrust plate is located at the top of the integrated shaft 31, and the lower thrust plate is located at the bottom of the integrated shaft 31. The upper thrust plate and the lower thrust plate are permanent magnets with opposite polarities. An axial suspension gap is formed between the upper thrust plate, the lower thrust plate, and the thrust magnetic ring 43.

[0023] In the above embodiments, both the inner cylinder 11 and the outer cylinder 12 are made of non-magnetic aluminum alloy material, which ensures structural strength and avoids magnetic field interference.

[0024] In the above embodiments, the heat insulation layer 16 on the outside of the outer cylinder 12 can effectively reduce heat loss and improve heat dissipation efficiency.

[0025] In the above embodiments, the magnetoelectric composite stator 32 is sleeved in the middle of the integrated shaft 31 and fixed to the positioning boss 111 on the inner wall of the inner cylinder 11 by bolts.

[0026] In the above embodiments, the inner and outer flywheels are coaxially nested through the nested space formed by the inner and outer cylinders, reducing the radial space occupied. The magnetoelectric composite stator integrates the drive winding and the suspension winding within the same stator core, allowing the drive motor and the radial magnetic bearing to share the stator structure. This avoids the redundant structure of independent motor stators and bearing stators in traditional technologies, improving the overall integration of the device and making it suitable for miniaturized installation scenarios. The phase change cooling medium in the annular cooling cavity directly absorbs the heat from the outer flywheel and the magnetoelectric composite stator, and condenses and refluxes through the gas-liquid separation cover. The guide seat ensures uniform distribution of the phase change cooling medium, forming passive and efficient heat dissipation. This technology solves the problem of low cooling efficiency due to the need for external cooling modules in traditional technologies. The upper and lower thrust plates use permanent magnets with opposite polarities in conjunction with the axial auxiliary windings. While achieving axial suspension, it also generates radial compensation force by adjusting the current of the corresponding axial auxiliary winding in the event of a single radial bearing failure. This corrects rotor imbalance by utilizing the magnetic field coupling effect, thereby improving the fault tolerance of the device. This solves the problem of low reliability caused by rotor imbalance due to single bearing failure in traditional technologies. As a result, the device has achieved significant improvements in integration, heat dissipation performance, and reliability, making it suitable for working scenarios with high installation space, energy storage efficiency, and operational reliability.

[0027] Example 2: This invention provides a nested magnetoelectric integrated reverse dual flywheel energy storage device, referenced. Figure 4 Gas-liquid separation cover 14, including cover plate body 141; The bottom of the cover plate body 141 is provided with a condensation tank 142, the inner side of the condensation tank 142 is provided with a guide cone 143, and the edge of the cover plate body 141 is provided with a liquid return hole 144, which connects the condensation tank 142 and the annular cooling chamber 13. The top surface of the flow guide seat 15 is a conical structure, and the side of the flow guide seat 15 is provided with flow equalization holes.

[0028] In the above embodiments, the high-temperature gaseous phase change cooling medium rises to the condensation tank and liquefies upon cooling. The guide cone 143 guides the liquid along the condensation tank 142 to the return hole 144 at the edge, and finally returns to the annular cooling chamber 13, forming a passive closed-loop heat dissipation that does not require additional power and reduces energy loss.

[0029] In the above embodiments, the conical structure and flow equalization holes of the flow guide seat 15 can make the phase change cooling medium flow evenly through the cooling fins 323, avoiding local overheating.

[0030] Example 3: This invention provides a nested magnetoelectric integrated reverse dual flywheel energy storage device, wherein both the inner flywheel 21 and the outer flywheel 22 adopt a composite structure of metal hub and composite material ring; The inner wall of the metal hub is provided with an annular boss, and the rotor magnetic ring is embedded in the annular boss.

[0031] The composite ring is formed by prestressed winding and laser in-situ curing process.

[0032] In the above embodiments, the inner wall of the metal hub is provided with an annular boss, and the rotor magnetic ring is embedded in the annular boss and is radially opposite to the stator core to ensure precise matching with the magnetoelectric composite stator.

[0033] In the above embodiments, the surface linear velocity of the composite material ring is not less than 750 m / s, so as to significantly improve the energy density.

[0034] In the above embodiments, both the inner and outer flywheels adopt a composite structure of metal hub and composite material ring, which solves the problem of low energy density of flywheel energy storage devices caused by traditional composite material molding processes, and can be applied to the needs of high energy storage scenarios.

[0035] Example 4: This invention provides a nested magnetoelectric integrated reverse dual flywheel energy storage device. The stator core 321 has multiple slots 322 along its circumference. The drive winding 33 and the suspension winding 34 are embedded in the slots 322 in a layered winding manner. The drive winding 33 is located in the lower layer of the slots 322 and extends along the axial direction of the stator core 321 to generate a rotating magnetic field. The suspension winding 34 is located in the upper layer of the slots 322 and is distributed in a ring to generate a radial suspension force. The stator core 321 has cooling fins 323 on its outer periphery that extend into the annular cooling cavity 13 and come into contact with the phase change cooling medium.

[0036] In the above embodiments, a rotating magnetic field is generated by the drive winding 33, a radial levitation force is generated by the suspension winding 34, and the drive winding 33 and the suspension winding 34 are integrated into the stator core, which greatly improves the integration of the device.

[0037] In the above embodiments, the stator core 321 is provided with cooling fins 323 extending into the annular cooling cavity 13, which can directly transfer the heat generated by the drive winding 33 and the suspension winding 34 to the phase change cooling medium, thereby achieving efficient heat conduction.

[0038] Example 5: This invention provides a nested magnetoelectric integrated reversible dual flywheel energy storage device, with a drive winding 34 including an inner motor winding and an outer motor winding; the inner motor winding cooperates with the first rotor magnetic ring on the inner wall of the inner flywheel 21, and the outer motor winding cooperates with the second rotor magnetic ring on the inner wall of the outer flywheel 22, so as to drive the inner flywheel 21 and the outer flywheel 22 to rotate in opposite directions.

[0039] In the above embodiments, the inner motor winding and the outer motor winding are respectively connected to different frequency converters to drive the inner flywheel 21 and the outer flywheel 22 to rotate in opposite directions, thereby canceling the gyroscopic torque.

[0040] Example 6: This invention provides a nested magnetoelectric integrated reverse dual flywheel energy storage device. The axial auxiliary winding 44 includes an upper auxiliary winding disposed at the top of the stator core 321 and a lower auxiliary winding disposed at the bottom of the stator core 321. The upper auxiliary winding is opposite to the first thrust magnetic ring of the inner flywheel 21, and the lower auxiliary winding is opposite to the second thrust magnetic ring of the outer flywheel 22. Both the upper auxiliary winding and the lower auxiliary winding are multi-phase coils; Both the first thrust magnetic ring at the top of the inner flywheel 21 and the second thrust magnetic ring of the outer flywheel 22 are permanent magnets.

[0041] In the above embodiments, by setting an upper auxiliary winding and a lower auxiliary winding, which are respectively positioned opposite to the first thrust magnetic ring and the second thrust magnetic ring, independent adjustment of the output magnetic field is achieved.

[0042] Example 7: This invention provides a nested magnetoelectric integrated reversible dual flywheel energy storage device. Both the upper and lower thrust plates are provided with buffer pads 45 on their outer peripheries. The buffer pads 45 are made of elastic wear-resistant material, and the outer diameter of the buffer pads 45 is larger than the inner diameter of the thrust magnetic ring 43.

[0043] In the above embodiments, the gap between the buffer pad 45 and the thrust magnetic ring 43 is 0.5-1mm.

[0044] In the above embodiments, the buffer pad 45 is made of polytetrafluoroethylene composite material, which has elasticity and wear resistance.

[0045] In the above embodiments, when the rotor axial offset exceeds the safety threshold, the buffer pad 45 contacts the thrust magnetic ring 43 to achieve mechanical limit protection and avoid rigid collision damage to the components.

[0046] Example 8: This invention provides a nested magnetoelectric integrated reverse double flywheel energy storage device, wherein a heat-conducting pad is provided between the inner cylinder 11 and the stator core 321, and the heat-conducting pad is made of graphite material.

[0047] In the above embodiments, thermally conductive pads are used to improve heat transfer efficiency and achieve rapid cooling of the device.

[0048] Example 9: This invention provides a nested magnetoelectric integrated reverse double flywheel energy storage device. An electric heating element is provided at the bottom of the annular cooling cavity, and a temperature sensor 5 is provided inside the stator core 321. The electric heating element and the temperature sensor 5 are electrically connected.

[0049] In the above embodiments, the temperature data of the annular cooling cavity 13 is detected by the temperature sensor 5. When the detected temperature data is lower than the preset temperature threshold data, the electric heating element is controlled to start heating automatically to avoid the phase change cooling medium from solidifying due to excessively low temperature, thereby ensuring the stable operation of the device in a low temperature environment.

[0050] Example 10: This invention provides a nested magnetoelectric integrated reverse dual flywheel energy storage device, a vacuum component 17, including a vacuum pump and a vacuum sensor; the vacuum pump is connected to the inner side of the inner cylinder 11 and the annular cooling chamber 13 through a pipe, and the vacuum sensor is set at the top of the inner cylinder 11 and the bottom of the outer cylinder 12.

[0051] In the above embodiments, the vacuum assembly monitors the vacuum level of the inner cylinder 11 in real time through a vacuum sensor, and extracts air from the inner side of the inner cylinder 11 and the annular cooling cavity 13 through a vacuum pump, so as to reduce the air resistance of the nested flywheel assembly 2 and improve the energy storage efficiency.

[0052] As is known from common technical knowledge, this invention can be implemented through other embodiments that do not depart from its spirit or essential characteristics. Therefore, the disclosed embodiments described above are merely illustrative in all respects and are not the only ones. All modifications within the scope of this invention or its equivalents are included in this invention.

[0053] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0054] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0055] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0056] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A nested magnetoelectric integrated reversing dual-flywheel energy storage device, characterized in that, include: Housing assembly, nested flywheel assembly, magneto-electric integrated support assembly, and axially coordinated fault-tolerant assembly; The housing assembly has an inner cylinder and an outer cylinder coaxially arranged inside, and an annular cooling cavity is formed between the inner cylinder and the outer cylinder to accommodate the phase change cooling medium. The outer cylinder is provided with a gas-liquid separation cover at the top, and the inner cylinder is provided with a flow guide seat at the bottom; A heat insulation layer is provided on the outer side of the outer cylinder; The nested flywheel assembly includes an inner flywheel and an outer flywheel; The inner flywheel is coaxially sleeved on the inner side of the inner cylinder, and the outer flywheel is coaxially sleeved on the outer side of the inner cylinder and located in the annular cooling cavity; The inner flywheel rotates in the opposite direction to the outer flywheel; The magnetoelectric integrated support assembly includes an integrated shaft and a magnetoelectric composite stator; The integrated shaft is coaxially inserted inside the inner cylinder to provide support for axial components; The magnetoelectric composite stator is sleeved in the middle of the integrated shaft and fixed to the inner wall of the inner cylinder by bolts; The magnetoelectric composite stator includes a stator core, which integrates a drive winding and a suspension winding. The stator core is provided with axial auxiliary windings at both the upper and lower ends. The inner flywheel and the outer flywheel are both provided with rotor magnetic rings on their inner walls. The drive winding and the rotor magnetic ring cooperate to form a drive motor, and the suspension winding and the rotor magnetic ring cooperate to form a radial magnetic suspension bearing. The axial cooperative fault-tolerant component includes an upper thrust disk, a lower thrust disk, and a thrust magnetic ring; The upper thrust plate is located at the top of the integrated shaft, and the lower thrust plate is located at the bottom of the integrated shaft. The upper thrust plate and the lower thrust plate are permanent magnets with opposite polarities. An axial suspension gap is formed between the upper thrust plate, the lower thrust plate, and the thrust magnetic ring.

2. The nested magnetoelectric integrated reversing dual flywheel energy storage device according to claim 1, characterized in that, The gas-liquid separation cover includes a cover plate body; The bottom of the cover plate body is provided with a condensation tank, the inner side of the condensation tank is provided with a guide cone, and the edge of the cover plate body is provided with a liquid return hole, which connects the condensation tank and the annular cooling chamber. The top surface of the flow guide seat is a conical structure, and the side of the flow guide seat is provided with flow equalization holes.

3. The nested magnetoelectric integrated reversing dual flywheel energy storage device according to claim 1, characterized in that, Both the inner and outer flywheels adopt a composite structure of metal hub and composite material ring; The inner wall of the metal hub is provided with an annular boss, and the rotor magnetic ring is embedded in the annular boss. The composite material ring is formed by a prestressed winding laser in-situ curing process.

4. The nested magnetoelectric integrated reversing dual flywheel energy storage device according to claim 1, characterized in that, The stator core has multiple slots along the circumference. The drive winding and the suspension winding are embedded in the slots in a layered winding manner. The drive winding is located in the lower layer of the slots and extends along the axial direction of the stator core to generate a rotating magnetic field. The suspension winding is located in the upper layer of the slots and is distributed in a ring to generate a radial suspension force. The stator core is provided with cooling fins on its outer periphery that extend into the annular cooling cavity and come into contact with the phase change cooling medium.

5. The nested magnetoelectric integrated reversing dual flywheel energy storage device according to claim 1, characterized in that, The drive winding includes an inner motor winding and an outer motor winding; The inner motor winding engages with the first rotor magnetic ring on the inner wall of the inner flywheel, and the outer motor winding engages with the second rotor magnetic ring on the inner wall of the outer flywheel, so as to drive the inner flywheel and the outer flywheel to rotate in opposite directions.

6. The nested magnetoelectric integrated reversing dual flywheel energy storage device according to claim 1, characterized in that, The axial auxiliary winding includes an upper auxiliary winding located at the top of the stator core and a lower auxiliary winding located at the bottom of the stator core. The upper auxiliary winding is opposite to the first thrust magnetic ring of the inner flywheel, and the lower auxiliary winding is opposite to the second thrust magnetic ring of the outer flywheel. Both the upper auxiliary winding and the lower auxiliary winding are multi-phase coils; Both the first thrust magnetic ring at the top of the inner flywheel and the second thrust magnetic ring of the outer flywheel are permanent magnets.

7. A nested magnetoelectric integrated reversing dual flywheel energy storage device according to claim 1, characterized in that, Both the upper and lower thrust plates are provided with buffer pads on their outer periphery; The buffer pad is made of elastic and wear-resistant material, and the outer diameter of the buffer pad is larger than the inner diameter of the thrust magnetic ring.

8. A nested magnetoelectric integrated reversing dual flywheel energy storage device according to claim 1, characterized in that, A thermally conductive pad is provided between the inner cylinder and the stator core, and the thermally conductive pad is made of graphite material.

9. A nested magnetoelectric integrated reversing dual flywheel energy storage device according to claim 1, characterized in that, The bottom of the annular cooling chamber is equipped with an electric heating element; A temperature sensor is installed inside the stator core; The electric heating element is electrically connected to the temperature sensor.

10. A nested magnetoelectric integrated reversing dual flywheel energy storage device according to claim 1, characterized in that, Vacuum components, including vacuum pumps and vacuum sensors; The vacuum pump is connected to the inner side of the inner cylinder and the annular cooling chamber via a pipe; The vacuum sensors are located at the top of the inner cylinder and the bottom of the outer cylinder.

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