Radial superconducting magnetic suspension bearing

Abstract

The invention provides a radial superconducting magnetic suspension bearing, and belongs to the technical field of bearings. The invention provides a radial superconducting magnetic suspension bearing. The radial superconducting magnetic suspension bearing comprises a base, an inner supporting seat, a rotating seat and an outer supporting seat, the inner supporting seat is arranged on the upper end face of the base, and an inner mounting position is formed on the inner wall of the inner supporting seat; an inner-layer superconducting ring is fixed at the inner mounting position; the inner supporting seat can realize cooling of the inner-layer superconducting ring after a cooling medium is introduced into the inner supporting seat; the periphery of the inner supporting seat is sleeved with the rotating seat, and the periphery of the rotating seat is sleeved with a permanent magnet ring; the rotating seat is coaxially connected with a rotating shaft so as to be connected with a flywheel; the outer supporting seat sleeves the periphery of the rotating seat, and the outer wall of the outer supporting seat is surrounded by an outer-layer superconducting ring; and the outer supporting seat can realize cooling of the outer superconducting ring after a cooling medium is introduced into the outer supporting seat. According to the radial superconducting magnetic suspension bearing provided by the invention, the permanent magnet ring is subjected to the acting force of the inner-layer superconducting ring and the outer-layer superconducting ring to drive the rotating seat to be in a suspension state, so that the magnetic field constraint on the permanent magnet ring is enhanced, and the permanent magnet ring is prevented from shifting.

Description

Technical Field

[0001] This invention belongs to the field of bearing technology, specifically relating to a radial superconducting magnetic levitation bearing. Background Technology

[0002] Renewable energy sources are intermittent and random, affecting the safe and stable operation of the power grid. To address this issue, energy storage technology has been introduced into the power grid. Among various energy storage technologies, flywheel energy storage systems have become one of the most promising technologies in the field of short-term, high-power energy storage due to their significant advantages such as high conversion efficiency, large instantaneous power, fast response speed, long service life, and small environmental impact. As a core component of flywheel energy storage systems, the performance of superconducting magnetic levitation bearings directly determines the operational stability, energy storage efficiency, and power density of the energy storage system.

[0003] Superconducting magnetic levitation bearings utilize the unique Meissner effect and magnetic flux pinning properties of superconductors to achieve contactless support and frictionless operation between the rotor and stator. Compared with traditional mechanical bearings, electromagnetic bearings, and permanent magnet bearings, they have outstanding advantages such as extremely low coefficient of friction, self-stable levitation without additional energy input, low noise, and low maintenance requirements, making them the preferred bearing type for large energy storage flywheel energy storage shaft systems.

[0004] However, as the demand for energy storage capacity in flywheel energy storage systems continues to increase, the weight of the rotor carried by the superconducting magnetic levitation bearing is also constantly increasing, leading to a continuous increase in the load on the superconducting magnetic levitation bearing. As the core component for generating and bearing the magnetic field, the performance stability of the superconducting ring directly determines the levitation effect of the superconducting magnetic levitation bearing. In actual use, the magnetic field constraint of the superconducting ring on the rotor sometimes fails to meet the requirements, resulting in poor rotor anti-interference ability and easy rotor misalignment, affecting the use of the superconducting magnetic levitation bearing. Summary of the Invention

[0005] The purpose of this invention is to provide a radial superconducting magnetic levitation bearing, which aims to solve the problem of low magnetic field constraint on the rotor by the superconducting ring, which makes the rotor prone to displacement.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is: to provide a radial superconducting magnetic levitation bearing, comprising: a base; An inner support base is disposed on the upper end face of the base. The inner support base has a hollow cavity with its axis along the vertical direction. The inner wall of the hollow cavity forms an inner mounting position. An inner superconducting ring is fixed in the inner mounting position. The inner circumference of the inner support base can be cooled after a cooling medium is introduced. A rotating seat is fitted around the outer periphery of the inner support seat, and a permanent magnet ring is fitted around the outer periphery of the rotating seat; the rotating seat is coaxially connected to a rotating shaft for connecting to a flywheel; and An outer support base is sleeved on the outer periphery of the rotating base, and an outer superconducting ring is surrounded on the outer wall of the outer support base; the outer periphery of the outer support base can be cooled by introducing a cooling medium. The permanent magnet ring is subjected to the forces of the inner superconducting ring and the outer superconducting ring, which drives the rotating seat to be continuously coaxially arranged with the inner superconducting ring and the outer superconducting ring, and in a suspended state.

[0007] In one possible implementation, multiple sets of the permanent magnet rings are sleeved on the outside of the rotating seat from top to bottom; A middle spacer ring is provided between two adjacent sets of permanent magnet rings, and the middle spacer ring is sleeved on the outside of the rotating seat.

[0008] In one possible implementation, multiple sets of the inner superconducting rings are arranged from top to bottom on the inner support base; Multiple sets of the outer superconducting rings are arranged from top to bottom on the outer support base.

[0009] In one possible implementation, the inner superconducting ring is made of a low-temperature superconducting material; The outer superconducting ring is made of high-temperature superconducting material.

[0010] In one possible implementation, the outer wall of the inner support is provided with an inner thermal insulation structure; The inner wall of the outer support base is provided with an outer heat insulation structure; The inner and outer thermal insulation structures are used to isolate heat conduction between the inner and outer superconducting rings.

[0011] In one possible implementation, the inner support has a lower opening and an upper top wall, the inner support is fastened to the base, the inner support is adapted to cover the outside of the inner superconducting ring, and the inner mounting position is adapted to limit the inner superconducting ring.

[0012] In one possible implementation, the inner superconducting ring includes a plurality of enclosing inner superconducting blocks, which are designed to be independently disassembled and replaced in case of damage.

[0013] In one possible implementation, a fixed housing is provided on the outer side of the outer superconducting ring. The fixed housing has a lower opening and an upper top wall. The upper top wall is adapted for the passage of the rotating shaft. The lower opening is disposed on the outside of the base. An external mounting position for limiting the outer superconducting ring is formed between the fixed housing and the outer support seat. The height of the lower opening is greater than the height of the rotating seat, which is used for the levitation of the rotating seat and the permanent magnet ring. The outer superconducting ring includes multiple enclosed outer superconducting blocks, which are used for independent disassembly and replacement after damage.

[0014] In one possible implementation, the rotating seat includes: A rotating cylinder is sleeved on the outside of the inner support base, and the permanent magnet ring is sleeved on the outside of the rotating cylinder; A rotating base plate, located at the lower end of the rotating cylinder, supports the permanent magnet ring; and A rotating cover plate is detachably mounted on the upper end of the rotating cylinder, which limits the permanent magnet ring to the rotating base plate.

[0015] In one possible implementation, the base is provided with a support pad for supporting the inner superconducting ring.

[0016] The beneficial effects of the radial superconducting magnetic levitation bearing provided by this invention are as follows: Compared to existing technologies, the base provides fundamental support for the entire bearing, ensuring the stability of the installation of each component; It is equipped with an inner superconducting ring and an outer superconducting ring, that is, it has a two-layer superconducting stator structure. The inner superconducting ring and the outer superconducting ring are arranged coaxially and nested in the radial direction to form a double-layer load-bearing structure. The inner superconducting ring is assembled on the inner support base. The inner superconducting ring is set at the center of the upper end face of the base through the inner support base. The inner mounting position of the inner support base realizes the limitation of the inner superconducting ring, and at the same time, the inner support base can cool the inner superconducting ring. The outer superconducting ring is assembled on the outer support base. The outer superconducting ring is sleeved on the outside of the permanent magnet ring through the outer support base. The outer support base is responsible for cooling the outer superconducting ring. The inner and outer superconducting rings serve as the stator of the bearing; The permanent magnet ring is disposed between the inner superconducting ring and the outer superconducting ring. It is sleeved on the outside of the inner support seat through a rotating seat and is coaxially arranged with the inner superconducting ring. The permanent magnet ring and the rotating seat have rotational freedom. The rotating shaft at the upper end of the rotating seat is used to connect the flywheel. The permanent magnet ring acts as the rotor of the bearing and connects to the flywheel, which facilitates flywheel energy storage. The inner and outer superconducting rings interact with the permanent magnet ring based on the flux pinning effect of the superconducting material, generating a radial levitation force that allows the permanent magnet ring to be suspended. The permanent magnet ring drives the rotating base to levitate synchronously. The inner and outer superconducting rings work together to improve levitation stability and load-bearing capacity. The inner and outer support bases ensure that the inner and outer superconducting rings maintain precise positions during operation through mechanical limiting. The device is equipped with an inner superconducting ring and an outer superconducting ring, which can enhance the interaction force between the stator and rotor and increase the electromagnetic force of the device. The coaxial design of the inner and outer superconducting rings improves the uniformity of the magnetic field distribution and significantly enhances the magnetic field confinement capability of the permanent magnet ring. The cooperation of the two magnetic fields forms a more stable magnetic field environment, effectively resisting external interference and reducing the radial displacement of the permanent magnet ring caused by insufficient magnetic field confinement during rotation. This ensures that the rotor always rotates stably on the preset trajectory, thereby guaranteeing the operational stability of the superconducting magnetic levitation bearing and providing reliable support for the efficient operation of the flywheel energy storage system. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A three-dimensional structural schematic diagram of a radial superconducting magnetic levitation bearing provided in an embodiment of the present invention; Figure 2 This is a three-dimensional structural diagram of the outer superconducting block used in an embodiment of the present invention; Figure 3 This is a three-dimensional structural diagram of the permanent magnet ring used in an embodiment of the present invention; Figure 4 This is a three-dimensional structural diagram of the inner support base used in an embodiment of the present invention; Figure 5 This is a three-dimensional structural diagram of the inner superconducting block used in an embodiment of the present invention; Figure 6 This is a three-dimensional structural diagram of the gasket used in an embodiment of the present invention; Figure 7 This is a schematic diagram of the vertical cross-sectional structure of the radial superconducting magnetic levitation bearing used in the embodiments of the present invention, passing through the vertical axis. Figure 8 This is a schematic diagram of the internal structure of a flywheel energy storage system provided in an embodiment of the present invention.

[0019] In the diagram: 1. Base; 2. Inner superconducting block; 3. Inner support seat; 4. Inner thermal insulation structure; 5. Permanent magnet ring; 6. Support pad; 7. Outer superconducting block; 8. Outer support seat; 9. Outer thermal insulation structure; 10. Intermediate spacer ring; 11. Rotating seat; 12. Rotating shaft; 13. Flywheel; 14. Fixed shell; 15. Rotating cylinder; 16. Rotating base plate; 17. Rotating cover plate. Detailed Implementation

[0020] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, 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 merely illustrative of the present invention and are not intended to limit the present invention.

[0021] Please refer to Figures 1 to 8 The present invention will now describe a specific embodiment of a radial superconducting magnetic levitation bearing, which includes: a base 1, an inner support 3, a rotating seat 11, and an outer support 8.

[0022] The inner support 3 is set on the upper end face of the base 1. The inner support 3 has a hollow cavity with its axis along the vertical direction. The inner wall of the hollow cavity forms an inner mounting position. The inner superconducting ring is fixed in the inner mounting position. The inner circumference of the inner support 3 can be cooled after a cooling medium is introduced. A rotating seat 11 is fitted around the outer periphery of the inner support seat 3, and a permanent magnet ring 5 is fitted around the outer periphery of the rotating seat 11; a rotating shaft 12 is coaxially connected to the rotating seat 11 for connection to the flywheel 13; and The outer support 8 is sleeved on the outer periphery of the rotating seat 11, and the outer wall of the outer support 8 is surrounded by an outer superconducting ring; the outer periphery of the outer support 8 can be cooled by introducing a cooling medium. Among them, the permanent magnet ring 5 is subjected to the forces of the inner superconducting ring and the outer superconducting ring, which drives the rotating seat 11 to be continuously coaxially set with the inner superconducting ring and the outer superconducting ring, and is in a suspended state.

[0023] For details, please refer to Figures 1 to 8 The base 1 is frustum-shaped. For ease of description, the axial direction of the base 1 is defined as the height direction. The base 1 provides basic support for the entire bearing and ensures the stability of the installation of each component.

[0024] The base 1 can be cylindrical.

[0025] It is equipped with an inner superconducting ring and an outer superconducting ring, which can be set correspondingly. The inner and outer superconducting rings have the same height, that is, it has a two-layer superconducting stator structure. The inner and outer superconducting rings are arranged coaxially and nested in the radial direction to form a double-layer load-bearing structure. The inner and outer superconducting rings can simultaneously exert force on the permanent magnet ring 5.

[0026] The inner superconducting ring is mounted on the inner support 3. The inner superconducting ring is set on the upper end face of the base 1 through the inner support 3. The axis of the inner support 3 coincides with the axis of the base 1. The lower end of the inner support 3 is detachably connected to the base 1. The inner mounting position of the inner support 3 realizes the limitation of the inner superconducting ring. The inner mounting position facilitates the installation of the inner superconducting ring. At the same time, the inner support 3 can cool the inner superconducting ring.

[0027] The inner support 3 and the base 1 can be connected by various methods such as snap-fit, adhesive, and bolt.

[0028] The inner support 3 can be cooled by liquid nitrogen. The inner support 3 has a first cavity in its side wall and a first connection port at its lower end. The first connection port is connected to the first cavity. The base 1 is provided with a liquid nitrogen injection port. The first connection port is connected to the liquid nitrogen injection port, which facilitates the injection of liquid nitrogen into the first cavity to cool the inner superconducting ring.

[0029] The outer superconducting ring is mounted on the outer support base 8. The outer superconducting ring is sleeved on the outside of the permanent magnet ring 5 through the outer support base 8. The axis of the outer support base 8 coincides with the axis of the base 1. The lower end of the outer support base 8 is detachably connected to the base 1. The outer support base 8 is responsible for cooling the outer superconducting ring.

[0030] The outer support 8 and the base 1 can be connected by various methods such as snap-fit, adhesive, or bolt.

[0031] The outer support 8 can be cooled by liquid nitrogen. That is, the outer support 8 has a second cavity on its side wall and a second connection port at its lower end. The second connection port is connected to the second cavity and is connected to the liquid nitrogen injection port on the base 1, so as to inject liquid nitrogen into the second cavity for cooling the outer superconducting ring.

[0032] The inner and outer superconducting rings serve as the stator of the bearing.

[0033] The permanent magnet ring 5 is disposed between the inner superconducting ring and the outer superconducting ring, and is sleeved on the outside of the inner support base 3 through the rotating seat 11. It is coaxially arranged with the inner superconducting ring, and the axis of the rotating seat 11 coincides with the axis of the base 1. The permanent magnet ring 5 and the rotating seat 11 have the freedom of rotation.

[0034] The rotating seat 11 and the base 1 can be locked and limited by a limiting member. When the limiting member is activated, it temporarily limits the rotating seat 11 to the base 1. When the limiting member is retracted, it releases the temporary limitation of the base 1 on the rotating seat 11, allowing the permanent magnet ring 5 and the rotating seat 11 to suspend and rotate. The limiting member can have various embodiments, such as a gripper, negative pressure adsorption, or a pusher.

[0035] The rotating shaft 12 at the upper end of the rotating seat 11 is used to connect the flywheel 13. The permanent magnet ring 5 serves as the rotor of the bearing and is connected to the flywheel 13 to facilitate energy storage in the flywheel 13.

[0036] The inner and outer superconducting rings interact with the permanent magnet ring 5 based on the magnetic flux pinning effect of the superconducting material to generate radial levitation force, which allows the permanent magnet ring 5 to be suspended. The permanent magnet ring 5 drives the rotating seat 11 to levitate synchronously. The inner and outer superconducting rings work together to improve the levitation stability and load-bearing capacity. The inner support seat 3 and the outer support seat 8 ensure that the inner and outer superconducting rings maintain precise positions during operation through mechanical limiting.

[0037] The coaxial design of the inner and outer superconducting rings improves the uniformity of the magnetic field distribution and significantly enhances the magnetic field confinement capability of the permanent magnet ring 5. The cooperation of the two magnetic fields forms a more stable magnetic field environment, effectively resisting external interference and reducing the radial displacement of the permanent magnet ring 5 due to insufficient magnetic field confinement during rotation. This ensures that the rotor always rotates stably on the preset trajectory, thereby guaranteeing the operational stability of the superconducting magnetic levitation bearing and providing reliable support for the efficient operation of the flywheel energy storage system.

[0038] As a specific embodiment of the radial superconducting magnetic levitation bearing provided by the present invention, please refer to Figure 3 as well as Figure 7 Multiple sets of permanent magnet rings 5 ​​are sleeved on the outside of the rotating seat 11 from top to bottom, and a middle spacer ring 10 is provided between two adjacent sets of permanent magnet rings 5. The middle spacer ring 10 is sleeved on the outside of the rotating seat 11.

[0039] For details, please refer to Figure 3 as well as Figure 7 There are multiple permanent magnet rings 5, and the middle spacer ring 10 separates the adjacent permanent magnet rings 5. When there are three permanent magnet rings 5, they are arranged in the order of permanent magnet ring 5, middle spacer ring 10, permanent magnet ring 5, middle spacer ring 10, permanent magnet ring 5.

[0040] The intermediate spacer ring 10 serves to separate and position adjacent permanent magnet rings 5, preventing mutual magnetic field interference or physical wear caused by direct contact between adjacent permanent magnet rings 5, while ensuring that multiple sets of permanent magnet rings 5 ​​remain coaxial and evenly distributed.

[0041] The rotating base 11 provides a unified mounting carrier for multiple sets of permanent magnet rings 5 ​​and intermediate spacer rings 10, so that all components form an integral rotor structure, which is synchronously suspended and rotated under the magnetic field of the inner and outer superconducting rings.

[0042] The arrangement of multiple permanent magnet rings 5 ​​increases the axial magnetic field distribution range and magnetic field strength of the rotor, and the magnetic flux pinning area between the inner and outer superconducting rings is correspondingly increased, thereby generating stronger radial levitation force and more stable magnetic field constraint.

[0043] The presence of the intermediate spacer ring 10 ensures the independence and uniform distribution of the magnetic field of each set of permanent magnet rings 5, avoiding magnetic field superposition disorder caused by the dense arrangement of multiple sets of permanent magnet rings 5, and ensuring that each set of permanent magnet rings 5 ​​can form a stable interaction with the double-layer superconducting ring. Compared with the structure of a single set of permanent magnet rings 5, the combination of multiple sets of permanent magnet rings 5 ​​and the double-layer superconducting ring allows the rotor to be constrained by a uniform and strong magnetic field at different positions in the axial direction, forming all-round magnetic field support.

[0044] As a specific embodiment of the radial superconducting magnetic levitation bearing provided by the present invention, please refer to Figures 4 to 7 Multiple sets of inner superconducting rings are arranged from top to bottom on the inner support 3; multiple sets of outer superconducting rings are arranged from top to bottom on the outer support 8.

[0045] For details, please refer to Figures 4 to 7 The inner support 3 provides axial installation and positioning space for multiple sets of inner superconducting rings, ensuring that multiple sets of inner superconducting rings are coaxial and evenly arranged; the outer support 8 provides axial installation and positioning space for multiple sets of outer superconducting rings, ensuring that multiple sets of outer superconducting rings are coaxial and evenly arranged.

[0046] An outer retaining ring is provided between two adjacent sets of outer superconducting rings, and an inner retaining ring is provided between two adjacent sets of inner superconducting rings.

[0047] Multiple sets of outer superconducting rings correspond one-to-one with multiple sets of inner superconducting rings, forming a double-layer, multi-set superconducting stator structure with multiple layers on the top and bottom and corresponding inner and outer layers.

[0048] The arrangement of multiple sets of inner superconducting rings and multiple sets of outer superconducting rings forms a multi-layer magnetic field confinement structure in the axial direction. Each inner superconducting ring and each outer superconducting ring can generate magnetic flux pinning effect with the corresponding position of the permanent magnet ring 5, thereby applying a stable radial levitation force to the permanent magnet ring 5 at different heights in the axial direction.

[0049] The synergistic effect of multiple inner and outer superconducting rings expands the axial coverage of the magnetic field confinement, avoiding the problem of uneven axial magnetic field distribution in single-layer superconducting rings, so that the permanent magnet ring 5 can be subjected to uniform and strong magnetic field confinement at all points in the axial direction during rotation.

[0050] The multi-layered inner superconducting ring, the outer superconducting ring, and the permanent magnet ring 5 form a multi-layered magnetic flux pinning effect, which wraps the rotor from all directions in the axial and radial directions, effectively resisting various offset trends that may occur during high-speed rotation of the rotor, and effectively suppressing the axial movement and radial sway of the rotor.

[0051] Even if the magnetic field of a certain inner or outer superconducting ring experiences slight fluctuations, the magnetic field constraints of other inner and outer superconducting rings can be replenished in time, ensuring the continuity and stability of the overall magnetic field constraint. This significantly improves the rotor's operational stability, avoids affecting the performance of the superconducting magnetic levitation bearing due to rotor misalignment, and enhances the load-bearing capacity and anti-interference capability of the permanent magnet ring 5.

[0052] As a specific embodiment of the radial superconducting magnetic levitation bearing provided by the present invention, please refer to Figures 1 to 7 The inner superconducting ring is made of low-temperature superconducting material; the outer superconducting ring is made of high-temperature superconducting material.

[0053] For details, please refer to Figures 1 to 7 Low-temperature superconducting materials have higher flux pinning strength and magnetic field carrying capacity, and can generate stronger magnetic field confinement; high-temperature superconducting materials have relatively higher critical temperatures and lower cooling costs.

[0054] The inner superconducting ring is located inside the permanent magnet ring 5. The use of low-temperature superconducting material can give full play to its advantage of strong magnetic field confinement and form strong radial support for the permanent magnet ring 5 from the inside. The outer superconducting ring is located outside the permanent magnet ring 5. The use of high-temperature superconducting material can reduce the overall system operating cost while ensuring a certain magnetic field confinement capability.

[0055] The base 1 can be equipped with two sets of liquid nitrogen injection ports. The first liquid nitrogen injection port injects liquid nitrogen into the inner support 3 to cool the inner superconducting ring. The second liquid nitrogen injection port injects liquid nitrogen into the outer support 8 to cool the outer superconducting ring. The temperature can be controlled by adjusting the amount of liquid nitrogen injected.

[0056] The synergistic effect of two different superconducting materials places the permanent magnet ring 5 under strong magnetic field constraints on both the inner and outer sides. The strong magnetic field constraint of the inner layer ensures the core stability of the rotor, while the stable magnetic field constraint of the outer layer further expands the constraint range. The magnetic field gradient formed on both the inner and outer sides makes the magnetic force on the permanent magnet ring 5 more balanced and the constraint more robust, effectively avoiding the rotor displacement problem caused by insufficient magnetic field strength or cooling failure of a single material, and improving the stability and reliability of the superconducting magnetic levitation bearing under different working conditions.

[0057] The differentiated selection of superconducting materials for the inner and outer superconducting rings creates a complementary double-layer magnetic field confinement structure.

[0058] As a specific embodiment of the radial superconducting magnetic levitation bearing provided by the present invention, please refer to Figures 1 to 7 The inner support 3 has an inner heat insulation structure 4 on its outer side wall; the outer support 8 has an outer heat insulation structure 9 on its inner side wall; the inner heat insulation structure 4 and the outer heat insulation structure 9 are used to isolate the heat conduction between the inner superconducting ring and the outer superconducting ring.

[0059] For details, please refer to Figures 1 to 7 The inner heat insulation structure 4 is set on the outer side wall of the inner support 3, and the outer heat insulation structure 9 is set on the inner side wall of the outer support 8. The inner heat insulation structure 4 and the outer heat insulation structure 9 form a heat insulation barrier between the inner superconducting ring and the outer superconducting ring, blocking the heat exchange between the inner superconducting ring and the outer superconducting ring, avoiding temperature fluctuations of the inner superconducting ring and the outer superconducting ring due to heat conduction, ensuring the stability of the superconducting performance of the inner superconducting ring and the outer superconducting ring, and thus strengthening the magnetic field confinement effect on the rotor.

[0060] The inner heat insulation structure 4 and the outer heat insulation structure 9 can be made of heat insulation material. The inner heat insulation structure 4 is wrapped around the outer side wall of the inner support 3, and the outer heat insulation structure 9 is distributed on the inner side wall of the outer support 8.

[0061] As a specific embodiment of the radial superconducting magnetic levitation bearing provided by the present invention, please refer to Figures 4 to 7 The inner support 3 has a lower opening and an upper top wall. The inner support 3 is fastened to the base 1. The inner support 3 is suitable for covering the outer side of the inner superconducting ring. The inner mounting position is suitable for limiting the inner superconducting ring.

[0062] For details, please refer to Figures 4 to 7 The inner support 3 is barrel-shaped, with a lower opening and an upper top wall. The lower opening of the inner support 3 is set on the base 1, and the upper top wall forms a shield and protection for the axial direction of the inner superconducting ring. The inner support 3 covers the inner superconducting ring inside, avoiding external impurities or external forces from affecting the inner superconducting ring. It fixes the position of the inner superconducting ring in the circumferential and axial directions, ensuring that the axis of the inner superconducting ring coincides with the axis of the base 1 and maintains precise coaxiality with the permanent magnet ring 5.

[0063] The inner mounting position is located on the inner side wall of the inner support 3 and is used to limit the inner superconducting ring.

[0064] The shape of the inner sidewall of the inner support 3 matches the inner superconducting ring, and the upper top wall of the inner support 3 is attached to the upper end face of the uppermost inner superconducting ring, which ensures the stability of the inner superconducting stator structure, guarantees the working stability of the inner superconducting ring, provides reliable structural support for magnetic field confinement, and improves the magnetic field confinement effect on the rotor.

[0065] The inner superconducting ring's limiting function ensures a uniform magnetic field distribution, preventing excessively strong or weak local magnetic fields caused by the inner superconducting ring's positional misalignment. This effectively prevents rotor misalignment due to uneven magnetic field forces. The inner support 3 protects the superconducting ring, reducing the performance degradation caused by external factors and ensuring the inner superconducting ring continuously provides stable magnetic field constraints. This ensures the rotor is always subjected to a uniform and strong magnetic field force during rotation, maintaining a stable levitation trajectory and preventing misalignment.

[0066] As a specific embodiment of the radial superconducting magnetic levitation bearing provided by the present invention, please refer to Figures 4 to 7 The inner superconducting ring includes multiple enclosed inner superconducting blocks 2, which are used for independent disassembly and replacement after damage.

[0067] For details, please refer to Figures 4 to 7 The inner superconducting ring is formed by multiple inner superconducting blocks 2 arranged in a ring shape within the inner support 3. The inner superconducting blocks 2 cooperate with each other to form a complete inner magnetic field.

[0068] As a specific embodiment of the radial superconducting magnetic levitation bearing provided by the present invention, please refer to Figure 2 as well as Figure 7 The outer superconducting ring is covered by a fixed housing 14. The fixed housing 14 has a lower opening and an upper top wall. The upper top wall is suitable for the shaft 12 to pass through. The lower opening is located on the outside of the base 1. The fixed housing 14 and the outer support seat 8 form an external mounting position for limiting the outer superconducting ring. The height of the lower opening is greater than the height of the rotating seat 11, which is used for the levitation of the rotating seat 11 and the permanent magnet ring 5. The outer superconducting ring includes multiple enclosed outer superconducting blocks 7, which are used for independent disassembly and replacement after damage.

[0069] For details, please refer to Figure 2 as well as Figure 7 The fixed housing 14 is barrel-shaped and covers the outside of the outer superconducting ring. It has a lower opening and an upper top wall. The rotating shaft 12 can pass through the upper top wall. The upper top wall provides a clearance passage for the rotating shaft 12. The rotating shaft 12 and the upper top wall are in clearance fit, which will not affect the rotation of the rotating shaft 12. At the same time, it provides axial protection for the entire internal structure and provides a stable working environment.

[0070] The vertical inner wall of the fixed housing 14 matches the outer superconducting ring. The lower end of the upper top wall has a limiting ring platform. The limiting ring platform is set to fit the upper end of the outer superconducting ring, which can limit the outer superconducting ring on the outer support 8 and prevent the outer superconducting ring from radially or axially shifting due to vibration or magnetic field force during operation.

[0071] The fixed housing 14 with a lower opening is located on the outside of the base 1, and the two can be fixed together by bolts.

[0072] A clearance space can be formed between the limiting ring platform and the upper top wall, which is suitable for the rotation of the rotor. When the rotating seat 11 is under force and in a suspended state, the upper top wall and the limiting ring platform will not affect the rotation of the rotor.

[0073] The outer superconducting ring is formed by multiple outer superconducting blocks 7 arranged in a ring on the outer support base 8. The outer superconducting blocks 7 cooperate with each other to form a complete outer magnetic field.

[0074] Each inner superconducting block 2 and outer superconducting block 7 possesses independent superconducting properties. The magnetic field of the inner superconducting ring obtained by combination is the superposition of the magnetic fields of each inner superconducting block 2, and the magnetic field of the outer superconducting ring obtained by combination is the superposition of the magnetic fields of each outer superconducting block 7, forming a uniform and strong ring magnetic field, which generates a stable magnetic flux pinning effect with the permanent magnet ring 5.

[0075] Each inner superconducting block 2 and outer superconducting block 7 is an independent installation unit, breaking the limitations of traditional integrated superconducting stator molding. When the inner superconducting ring / outer superconducting ring experiences performance degradation or damage due to long-term use, it is not necessary to disassemble the entire inner superconducting ring / outer superconducting ring. Only the damaged inner superconducting block 2 / outer superconducting block 7 can be replaced. The damaged inner superconducting block 2 / outer superconducting block 7 can be directly extracted. The replacement process is simple and avoids the extended system downtime caused by disassembling the entire stator.

[0076] It eliminates the need to replace the entire inner superconducting block 2 / outer superconducting block 7, reducing material and maintenance costs during the replacement process and ultimately achieving the technical effect of easy and low-cost replacement of the superconducting ring.

[0077] As a specific embodiment of the radial superconducting magnetic levitation bearing provided by the present invention, please refer to Figure 3 as well as Figure 7 The rotating base 11 includes a rotating cylinder 15, a rotating base plate 16, and a rotating cover plate 17. The rotating cylinder 15 is sleeved on the outside of the inner support base 3, and the permanent magnet ring 5 is sleeved on the outside of the rotating cylinder 15. The rotating base plate 16 is located at the lower end of the rotating cylinder 15 to support the permanent magnet ring 5. The rotating cover plate 17 is detachably located at the upper end of the rotating cylinder 15 to limit the permanent magnet ring 5 on the rotating base plate 16.

[0078] For details, please refer to Figure 3 as well as Figure 7The rotating cylinder 15 provides a circumferential mounting and positioning surface for the permanent magnet ring 5, ensuring that the permanent magnet ring 5 is coaxially set with the rotating cylinder 15; the rotating base plate 16 supports the permanent magnet ring 5 from the axial downward direction, providing stable support for the permanent magnet ring 5; the rotating cover plate 17 is fixed to the upper end of the rotating cylinder 15 by a detachable connection. After the permanent magnet ring 5 is installed, the rotating cover plate 17 is installed on the upper end of the rotating cylinder 15. The rotating cover plate 17 limits the permanent magnet ring 5 from the axial upward direction and cooperates with the rotating base plate 16 to firmly fix the permanent magnet ring 5 on the rotating cylinder 15, forming a complete rotor assembly.

[0079] The rotating seat 11 and the inner support seat 3 are fitted with a clearance to avoid affecting the rotation of the rotating seat 11.

[0080] As a specific embodiment of the radial superconducting magnetic levitation bearing provided by the present invention, please refer to Figure 6 as well as Figure 7 The base 1 is provided with a support pad 6 for supporting the inner superconducting ring.

[0081] For details, please refer to Figure 6 as well as Figure 7 The support pads 6 are placed between the base 1 and the inner superconducting ring, serving as a buffer and positioning element. Multiple sets of support pads 6 are provided, with each support pad 6 corresponding one-to-one with the inner superconducting block 2 of the bottom inner superconducting ring, ensuring uniform support and preventing excessive local stress that could cause deformation or displacement of the inner superconducting ring.

[0082] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A radial superconducting magnetic levitation bearing, characterized in that, include: Base; An inner support base is disposed on the upper end face of the base. The inner support base has a hollow cavity with its axis along the vertical direction. The inner wall of the hollow cavity forms an inner mounting position. An inner superconducting ring is fixed in the inner mounting position. The inner circumference of the inner support base can be cooled after a cooling medium is introduced. A rotating seat is fitted around the outer periphery of the inner support seat, and a permanent magnet ring is fitted around the outer periphery of the rotating seat; the rotating seat is coaxially connected to a rotating shaft for connecting to a flywheel; and An outer support base is sleeved on the outer periphery of the rotating base, and an outer superconducting ring is surrounded on the outer wall of the outer support base; the outer periphery of the outer support base can be cooled by introducing a cooling medium. The permanent magnet ring is subjected to the forces of the inner superconducting ring and the outer superconducting ring, which drives the rotating seat to be continuously coaxially arranged with the inner superconducting ring and the outer superconducting ring, and in a suspended state.

2. The radial superconducting magnetic levitation bearing as described in claim 1, characterized in that, Multiple sets of the permanent magnet rings are sleeved on the outer side of the rotating seat from top to bottom; A middle spacer ring is provided between two adjacent sets of permanent magnet rings, and the middle spacer ring is sleeved on the outside of the rotating seat.

3. The radial superconducting magnetic levitation bearing as described in claim 1, characterized in that, Multiple sets of the inner superconducting rings are arranged from top to bottom on the inner support base; Multiple sets of the outer superconducting rings are arranged from top to bottom on the outer support base.

4. A radial superconducting magnetic levitation bearing as described in claim 1, characterized in that, The inner superconducting ring is made of a low-temperature superconducting material; The outer superconducting ring is made of high-temperature superconducting material.

5. A radial superconducting magnetic levitation bearing as described in claim 4, characterized in that, The outer wall of the inner support base is provided with an inner heat insulation structure; The inner wall of the outer support base is provided with an outer heat insulation structure; The inner and outer thermal insulation structures are used to isolate heat conduction between the inner and outer superconducting rings.

6. A radial superconducting magnetic levitation bearing as described in claim 1, characterized in that, The inner support seat has a lower opening and an upper top wall. The inner support seat is fastened to the base. The inner support seat is adapted to cover the outside of the inner superconducting ring. The inner mounting position is adapted to limit the inner superconducting ring.

7. A radial superconducting magnetic levitation bearing as described in claim 1, characterized in that, The inner superconducting ring includes multiple enclosed inner superconducting blocks, which are used for independent disassembly and replacement after damage.

8. A radial superconducting magnetic levitation bearing as described in claim 1, characterized in that, The outer superconducting ring is covered by a fixed housing, which has a lower opening and an upper top wall. The upper top wall is suitable for the passage of the rotating shaft. The lower opening is disposed on the outside of the base. The fixed housing and the outer support form an external mounting position for limiting the outer superconducting ring. The height of the lower opening is greater than the height of the rotating base, which is used for the levitation of the rotating base and the permanent magnet ring. The outer superconducting ring includes multiple enclosed outer superconducting blocks, which are used for independent disassembly and replacement after damage.

9. A radial superconducting magnetic levitation bearing as described in claim 1, characterized in that, The rotating seat includes: A rotating cylinder is sleeved on the outside of the inner support base, and the permanent magnet ring is sleeved on the outside of the rotating cylinder; A rotating base plate, located at the lower end of the rotating cylinder, supports the permanent magnet ring; and A rotating cover plate is detachably mounted on the upper end of the rotating cylinder, which limits the permanent magnet ring to the rotating base plate.

10. A radial superconducting magnetic levitation bearing as described in claim 1, characterized in that, The base is provided with a support pad for supporting the inner superconducting ring.

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