Electromagnetic superconducting hybrid radial magnetic bearing

Abstract

The application provides an electromagnetic superconducting hybrid radial magnetic suspension bearing, which comprises a stator part and a rotor part, the stator part is sleeved outside the rotor part, the stator part is used for generating a stator electromagnetic field according to a stator current, the rotor part is used for generating a rotor superconducting coil magnetic field according to a rotor current, and the rotor superconducting coil magnetic field and the stator electromagnetic field interact to realize radial suspension of the rotor part in the stator part; the rotor part comprises a superconducting coil, a coil framework, an inner dewar and an outer dewar, the superconducting coil is wound on the coil framework, the inner dewar has a ring cavity structure, the coil framework is arranged in the ring cavity of the inner dewar, the outer dewar has a ring cavity structure, and the inner dewar is arranged in the ring cavity of the outer dewar. The technical scheme of the application can solve the technical problems of small suspended mass, poor stability and complex structure of the magnetic suspension bearing in the prior art.

Description

Technical Field

[0001] This invention relates to the field of magnetic levitation technology, and in particular to an electromagnetic superconducting hybrid radial magnetic levitation bearing. Background Technology

[0002] Currently, as high-speed motors are developing towards heavier loads, the weight of magnetic levitation bearing rotors is constantly increasing. Therefore, finding a stable way to levitate a large rotor has become an urgent issue. The increased rotor weight results in a larger magnetic levitation bearing volume and significant material loss. Without increasing the volume, it is difficult to improve the electromagnetic force, making it impossible to levitate a large rotor.

[0003] Currently, magnetic levitation bearings typically employ three schemes: 1) Electromagnetic levitation bearings. These are essentially electromagnets with controllable current. By controlling the current in the bearing's stator coils, the magnetic field strength is changed, causing the rotor to experience a controllable electromagnetic force, thus maintaining its equilibrium state. This is an active levitation technology, and electromagnetic levitation bearings are the most commonly used type of magnetic levitation bearing in industry. 2) Superconducting electric levitation technology. Superconductors have almost zero resistance at low temperatures. Superconducting coils made of superconductors, when subjected to a large current, generate a strong magnetic field environment suitable for levitizing heavy objects. 3) A combination of superconducting electromagnetic levitation and electric levitation technology. This combines the advantages of both superconducting electric levitation and electromagnetic levitation, making it suitable for complex environments such as vacuum and high speed.

[0004] Each of the three aforementioned solutions has its own corresponding drawbacks: 1) For electromagnetic levitation bearings, the magnetic field generated is essentially electromagnetic induction. The stator magnetic field is generated by passing direct current through the stator coils, and the rotor magnetic field is induced by the stator magnetic field. Due to limitations imposed by conductor resistance and stator materials, the current allowed to pass through the stator coils is small, resulting in a low magnetic field strength. Furthermore, the volume of the stator limits the generated electromagnetic force, making it less effective at stabilizing rotors with large levitation masses. 2) For superconducting electric levitation technology, superconducting electric levitation is a passive levitation system. While the superconducting coils generate a large magnetic field after excitation, the magnitude of this magnetic field cannot be controlled based on the position of the suspended object, meaning the levitation force is uncontrollable. Therefore, the vibration of the suspended object cannot be controlled, and the vibration may diverge, resulting in poor levitation stability. 3) For the combination of superconducting electromagnetic levitation and electromagnetic levitation technology, current applications are limited to installing the two types of bearings separately in a device. They are uncoupled and operate independently, with the superconducting electric bearing part employing a "pinned levitation" system of high-temperature superconducting bearings. While this approach can suppress system vibration by utilizing the controllability of electromagnetic bearings, the superconducting electromagnetic bearing section operating alone still carries the risk of vibration divergence. Strictly speaking, the two types of bearings simply coexist, rather than being a cross-application of technologies; the separate operation of these two types of bearings complicates the device's structure. Summary of the Invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art.

[0006] This invention provides an electromagnetic superconducting hybrid radial magnetic levitation bearing, which includes a stator section and a rotor section. The stator section is sleeved outside the rotor section. The stator section is used to generate a stator electromagnetic field based on the stator current, and the rotor section is used to generate a rotor superconducting coil magnetic field based on the rotor current. The rotor superconducting coil magnetic field and the stator electromagnetic field cooperate to achieve radial levitation of the rotor section within the stator section. The rotor section includes: a superconducting coil, a coil frame, an inner Dewar, and an outer Dewar. The superconducting coil is wound on the coil frame. The inner Dewar has an annular cavity structure, and the coil frame is placed inside the annular cavity of the inner Dewar. The outer Dewar also has an annular cavity structure, and the inner Dewar is placed inside the annular cavity of the outer Dewar.

[0007] Furthermore, the rotor section also includes a rotor base and a baffle. The outer Dewar is sleeved outside the rotor base, and the baffle is located on one side of the outer Dewar along the rotor axis. The other side of the outer Dewar along the rotor axis contacts the rotor base, and the baffle is connected to the rotor base.

[0008] Furthermore, the baffle has a vacuum port and a liquid nitrogen injection port, which are spaced apart along the circumference of the baffle. The vacuum port is connected to the inner Dewar and the outer Dewar to create a vacuum between the inner and outer Dewars, and the liquid nitrogen injection port is connected to the inner Dewar to inject liquid nitrogen into the inner Dewar.

[0009] Furthermore, the baffle also has an excitation port, a vacuum port, a liquid nitrogen injection port, and an excitation port that are spaced apart along the circumference of the baffle. The excitation port is connected to the inner Dewar to excite the superconducting coil with current.

[0010] Furthermore, the rotor section also includes an inner support ring and an outer support ring. The inner support ring is located between the inner wall of the inner Dewar and the inner wall of the outer Dewar, and the outer support ring is located between the outer wall of the inner Dewar and the outer wall of the outer Dewar.

[0011] Furthermore, the rotor section also includes an inner retaining ring and an outer retaining ring. The inner retaining ring is located between the inner wall of the inner Dewar and the inner wall of the outer Dewar to restrict the position of the inner support ring along the rotor axial direction. The outer retaining ring is located between the outer walls of the inner Dewar and the outer Dewar to restrict the position of the outer support ring along the rotor axial direction.

[0012] Furthermore, there are two inner retaining rings, which are located on both sides of the inner support ring along the rotor axis; there are also two outer retaining rings, which are located on both sides of the outer support ring along the rotor axis.

[0013] Furthermore, the stator section includes a stator base and stator coils. The stator base has multiple pole shoes that are evenly distributed around the circumference of the stator base. The stator coils are wound around the multiple pole shoes to form a stator electromagnetic field.

[0014] Furthermore, the stator base has 8.2 p There are three poles, where p = 0, 1, 2, ...

[0015] Furthermore, the stator coil comprises q groups of stator coils, and any one of these groups is wound... The stator current of each of the q stator coil groups can be adjusted individually, where q is an integer.

[0016] This invention provides an electromagnetic superconducting hybrid radial magnetic levitation bearing. This bearing achieves radial levitation of the rotor within the stator by sequentially arranging a coil frame, superconducting coils, an inner Dewar liner, and an outer Dewar liner in the rotor section, which cooperate with the stator section. This invention integrates electromagnetic levitation technology with superconducting electric levitation technology, complementing each other's advantages. The electromagnetic superconducting hybrid radial magnetic levitation bearing has a simple structure and can be used to stably levitate rotors with large levitation masses. Compared with existing technologies, this invention solves the technical problems of small levitation mass, poor stability, and complex structure in existing magnetic levitation bearings. Attached Figure Description

[0017] The accompanying drawings, which form part of this specification, are provided to further illustrate embodiments of the invention and, together with the textual description, explain the principles of the invention. It is obvious that the drawings described below are merely some embodiments of the invention, and those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0018] Figure 1 A schematic diagram of the structure of an electromagnetic superconducting hybrid radial magnetic levitation bearing according to a specific embodiment of the present invention is shown;

[0019] Figure 2 A front view of an electromagnetic superconducting hybrid radial magnetic levitation bearing according to a specific embodiment of the present invention is shown;

[0020] Figure 3 It shows along Figure 2 Schematic diagram of the cross section of line AA;

[0021] Figure 4 It shows Figure 3 A magnified view of a portion of point I in the middle;

[0022] Figure 5 It shows along Figure 3Schematic diagram of the cross section of the middle BB line;

[0023] Figure 6 It shows Figure 5 A magnified view of a section at point II;

[0024] Figure 7 A schematic diagram of the stator coil winding and stator electromagnetic field generation mechanism according to a specific embodiment of the present invention is shown;

[0025] Figure 8 A schematic diagram of a superconducting coil winding according to a specific embodiment of the present invention is shown;

[0026] Figure 9 A schematic diagram of the magnetic field of a rotor superconducting coil provided according to a specific embodiment of the present invention is shown;

[0027] Figure 10 A schematic diagram showing a rotor position shift according to a specific embodiment of the present invention is shown;

[0028] Figure 11 A schematic diagram of stator electromagnetic field control variation provided according to a specific embodiment of the present invention is shown;

[0029] Figure 12 It shows in Figure 11 The diagram shows the forces acting on the rotor under the electromagnetic field of the stator.

[0030] Figure 13 An exploded view of the structure of an electromagnetic superconducting hybrid radial magnetic levitation bearing according to a specific embodiment of the present invention is shown;

[0031] Figure 14 A schematic diagram illustrating the use of the electromagnetic superconducting hybrid radial magnetic levitation bearing provided in a specific embodiment of the present invention is shown.

[0032] Figure 15 It shows Figure 14 Exploded view of the structure.

[0033] The above figures include the following reference numerals:

[0034] 10. Stator section; 11. Stator base; 11a. Pole shoe; 12. Stator coil; 20. Rotor section; 21. Superconducting coil; 22. Coil frame; 23. Inner Dewar; 24. Outer Dewar; 25. Rotor base; 26. Baffle; 26a. Vacuum port; 26b. Liquid nitrogen filling port; 26c. Excitation port; 27. Inner support ring; 28. Outer support ring; 29. ​​Inner retaining ring; 210. Outer retaining ring; 30. Mandrel; 40. Bearing housing; 50. Top cone; 60. Bearing housing fixing platform. Detailed Implementation

[0035] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0037] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0038] like Figures 1 to 13As shown, according to a specific embodiment of the present invention, an electromagnetic superconducting hybrid radial magnetic levitation bearing is provided. The electromagnetic superconducting hybrid radial magnetic levitation bearing includes a stator part 10 and a rotor part 20. The stator part 10 is sleeved outside the rotor part 20. The stator part 10 is used to generate a stator electromagnetic field according to the stator current. The rotor part 20 is used to generate a rotor superconducting coil magnetic field according to the rotor current. The rotor superconducting coil magnetic field and the stator electromagnetic field cooperate to achieve radial levitation of the rotor part 20 within the stator part 10. The rotor part 20 includes: a superconducting coil 21, a coil frame 22, an inner Dewar 23, and an outer Dewar 24. The superconducting coil 21 is wound on the coil frame 22. The inner Dewar 23 has an annular cavity structure, and the coil frame 22 is placed inside the annular cavity of the inner Dewar 23. The outer Dewar 24 has an annular cavity structure, and the inner Dewar 23 is placed inside the annular cavity of the outer Dewar 24.

[0039] This configuration provides an electromagnetic superconducting hybrid radial magnetic levitation bearing. This bearing achieves radial levitation of the rotor section 20 within the stator section 10 by sequentially arranging a coil frame 22, a superconducting coil 21, an inner Dewar 23, and an outer Dewar 24 within the rotor section 20, which cooperate with the stator section 10. This invention integrates electromagnetic levitation technology with superconducting electric levitation technology, complementing each other's advantages. The electromagnetic superconducting hybrid radial magnetic levitation bearing has a simple structure and can be used to stably levitate rotors with large levitation masses. Compared with existing technologies, the technical solution of this invention can solve the technical problems of small levitation mass, poor stability, and complex structure in existing magnetic levitation bearings.

[0040] Furthermore, in this invention, as Figure 3 , Figure 4 and Figure 13 As shown, to fix the position of the outer Dewar 24, the configurable rotor section 20 also includes a rotor base 25 and a baffle 26. The outer Dewar 24 is sleeved on the outside of the rotor base 25. The baffle 26 is located on one side of the outer Dewar 24 along the rotor axis, and the other side of the outer Dewar 24 along the rotor axis contacts the rotor base 25. The baffle 26 is connected to the rotor base 25. The rotor base 25 and the baffle 26 can fix the outer Dewar 24 on the rotor base 25, preventing axial displacement of the outer Dewar 24 during rotor movement.

[0041] Furthermore, in this invention, such as Figure 3 and Figure 13 As shown, in order to obtain a low-temperature working environment for the superconducting coil 21, a baffle 26 can be configured with a vacuum port 26a and a liquid nitrogen injection port 26b. The vacuum port 26a and the liquid nitrogen injection port 26b are spaced apart along the circumference of the baffle 26. The vacuum port 26a is connected to the space between the inner Dewar 23 and the outer Dewar 24 to evacuate the space between the inner Dewar 23 and the outer Dewar 24. The liquid nitrogen injection port 26b is connected to the inner Dewar 23 to inject liquid nitrogen into the inner Dewar 23.

[0042] In this invention, to excite the superconducting coil 21, a baffle 26 may be configured with an excitation port 26c. The excitation port 26c, the vacuum port 26a, and the liquid nitrogen filling port 26b are spaced apart circumferentially along the baffle 26. The excitation port 26c is connected to the inner Dewar 23 to excite the superconducting coil 21 with current. As a specific embodiment of this invention, the excitation port 26c, the vacuum port 26a, and the liquid nitrogen filling port 26b are spaced apart 120° circumferentially along the baffle 26.

[0043] Using this configuration, the superconducting coil magnetic field generation requires a cryogenic environment. Therefore, before excitation, a vacuum needs to be evacuated between the outer Dewar 24 and the inner Dewar 23 through the vacuum port 26a. After evacuation, liquid helium is injected into the inner Dewar 23 cavity through the liquid helium filling port to immerse the superconducting coil 21 for cooling, bringing the superconducting coil 21 to an extremely low temperature. After liquid helium filling, current is applied to the superconducting coil 21 through the excitation port 26c for excitation.

[0044] Furthermore, in this invention, as Figure 4 and Figure 13 As shown, to achieve fixed support of the inner Dewar 23 within the annular cavity of the outer Dewar 24, the configurable rotor portion 20 further includes an inner support ring 27 and an outer support ring 28. The inner support ring 27 is located between the inner wall of the inner Dewar 23 and the inner wall of the outer Dewar 24, and the outer support ring 28 is located between the outer wall of the inner Dewar 23 and the outer wall of the outer Dewar 24. The inner Dewar 23, which has an annular cavity structure, can be fixedly supported within the annular cavity of the outer Dewar 24 by the inner support ring 27 and the outer support ring 28. In a specific embodiment of the present invention, both the inner support ring 27 and the outer support ring 28 are fixed between the inner Dewar 23 and the outer Dewar 24 by welding to stably support the inner Dewar 23 and the outer Dewar 24.

[0045] Furthermore, in this invention, such as Figure 4 and Figure 13 As shown, in order to fix the positions of the inner support ring 27 and the outer support ring 28, the configurable rotor section 20 also includes an inner retaining ring 29 and an outer retaining ring 210. The inner retaining ring 29 is located between the inner wall of the inner Dewar 23 and the inner wall of the outer Dewar 24 to restrict the position of the inner support ring 27 along the rotor axial direction, and the outer retaining ring 210 is located between the outer wall of the inner Dewar 23 and the outer wall of the outer Dewar 24 to restrict the position of the outer support ring 28 along the rotor axial direction.

[0046] As a specific embodiment of the present invention, such as Figure 13As shown, the number of inner retaining rings 29 can be set to two, with the two inner retaining rings 29 located on both sides of the inner support ring 27 along the rotor axial direction; similarly, the number of outer retaining rings 210 can also be set to two, with the two outer retaining rings 210 located on both sides of the outer support ring 28 along the rotor axial direction. By setting two inner retaining rings 29 and two outer retaining rings 210, the positions of the inner support ring 27 and the outer support ring 28 along the rotor axial direction can be more accurately defined. In this embodiment, the inner retaining ring 29 can be fixedly connected to the inner Dewar 23, the outer Dewar 24, and the inner support ring 27 by welding, and the outer retaining ring 210 can be fixedly connected to the inner Dewar 23, the outer Dewar 24, and the outer support ring 28 by welding, thereby further improving the stability of the inner support ring 27 and the outer support ring 28.

[0047] Furthermore, in this invention, as Figure 7 As shown, in order to generate a stator electromagnetic field, the stator section 10 can be configured to include a stator base 11 and a stator coil 12. The stator base 11 has a plurality of pole shoes 11a, which are uniformly distributed along the circumference of the stator base 11. The stator coil 12 is wound around the plurality of pole shoes 11a to form a stator electromagnetic field.

[0048] As a specific embodiment of the present invention, the stator base 11 has an 8.2 p Each pole piece 11a, where p = 0, 1, 2... For example... Figure 7 As shown, there can be 16 pole shoes 11a, and each pole shoe 11a is wound with a stator coil 12.

[0049] Furthermore, in this invention, in order to control the stator electromagnetic field to adjust the radial suspension position of the inner rotor section 20, the stator coil 12 can be configured to include q stator coil groups, with any stator coil group wound... The stator current of each of the 11a pole shoes and q stator coil groups can be adjusted individually, where q is an integer.

[0050] As a specific embodiment of the present invention, such as Figure 7 As shown, the stator coil 12 includes four stator coil groups, namely stator coil group 1, stator coil group 2, stator coil group 3 and stator coil group 4, and any stator coil group is wound in series with four pole shoes 11a.

[0051] Applying this configuration method, such as Figure 7 As shown, direct currents i1, i2, i3, and i4 are respectively applied to stator coil groups 1, 2, 3, and 4. Each pole piece 11a forms a stable magnetic field radially, and the radial magnetic poles of all 16 pole pieces 11a facing the rotor section 20 are N. Figure 8 and Figure 9As shown, after the superconducting coil 21 of the rotor section 20 is cooled and energized by a rotor current, a stable rotor superconducting coil magnetic field is generated radially. The radial magnetic pole of the rotor superconducting coil magnetic field toward the stator section 10 is the S pole. A radial magnetic pole relationship of "opposite poles attracting each other" is formed between the stator section 10 and the rotor section 20, as shown in the figure. Figure 10 As shown, when the stator 10 is fixed, the rotor 20 will suspend at the theoretical equilibrium position O1 due to the radial magnetic force. There is no contact between the stator 10 and the rotor 20, and the rotor 20 is in force balance along the m-axis and n-axis. However, when the rotor 20 rotates, due to certain factors, such as uneven mass of the rotor 20 or external interference, the center of mass of the rotor 20 shifts, assuming it shifts to point O2, thus the displacement is... The displacement is decomposed along the m-axis and n-axis respectively. and This is equivalent to the rotor section 20 shifting Δm towards the stator coil group 1 and Δn towards the stator coil group 2.

[0052] At this point, the control algorithm reduces the currents i1 and i2 of stator coil group 1 and stator coil group 2 respectively, while increasing the currents i3 and i4 of stator coil group 3 and stator coil group 4 respectively. This causes the magnetic field strength generated by stator coil group 1 and stator coil group 2 to decrease, while the magnetic field strength of stator coil group 3 and stator coil group 4 to increase. Figure 11 As shown. This causes the rotor section 20 to be subjected to tensile forces F along the negative directions of the m-axis and the n-axis. m and F n ,like Figure 12 As shown, this causes the rotor 20 to return to the equilibrium position O1.

[0053] Similarly, the changes in current, magnetic field, and radial magnetic force that need to be adjusted when the rotor 20 is offset to other positions can be obtained, and the rotor 20 will eventually return to the equilibrium position.

[0054] Furthermore, in this invention, in order to further stabilize the position of the coil frame 22 in the inner Dewar 23, after the superconducting coil 21 is wound around the coil frame 22, the coil frame 22 is fixed inside the inner Dewar 23 by welding.

[0055] The electromagnetic superconducting hybrid radial magnetic levitation bearing of this invention utilizes the interaction between the active radial electromagnetic field of the stator and the radial passive electromagnetic field generated by the superconducting coils of the rotor to achieve controllable and stable radial levitation of the rotor, enabling stable rotor operation. The electromagnetic superconducting hybrid radial magnetic levitation bearing suspends the rotor at the center of the stator, with no contact between the rotor and stator. Therefore, during rotor operation, there is no mechanical contact friction and wear, resulting in low energy consumption, no need for lubrication, low noise, and long service life. The absence of friction and wear between the stator and rotor eliminates long-term maintenance requirements, making it suitable for systems with long operating cycles. Traditional electromagnetic levitation bearings require the stator's magnetic field to demagnetize the rotor during operation, thus generating electromagnetic force. However, the rotor superconducting coils of this invention can generate a high magnetic field strength, eliminating the need for stator magnetic field magnetization and reducing stator losses during operation. The rotor itself generates a strong magnetic field, requiring only a small current from the stator coils to produce a large electromagnetic force, making it suitable for rotors with large levitation masses.

[0056] According to another aspect of the invention, such as Figure 14 and Figure 15 As shown, a method for using an electromagnetic superconducting hybrid radial magnetic levitation bearing is provided. This method includes: mounting the rotor portion 20 (as described above) onto the mandrel 30, and fixing the stator portion 10 (as described above) within the bearing housing 40; using an axial magnetic levitation bearing or a top cone 50 to restrict the axial degree of freedom of the mandrel 30; sequentially performing vacuuming, liquid nitrogen cooling, and energizing on the rotor portion 20 to generate a rotor superconducting coil magnetic field; applying a controllable direct current to the stator portion 10 to generate a stator electromagnetic field that interacts with the rotor superconducting coil magnetic field, causing the mandrel 30 to levitate at the center of the bearing housing 40; and applying a rotational torque to the middle portion of the mandrel 30 to cause the mandrel 30 to rotate around the mandrel axial direction.

[0057] This configuration provides a method for using an electromagnetic superconducting hybrid radial magnetic levitation bearing. This method involves fixing the rotor portion 20 and stator portion 10 of the bearing, as shown above, to the spindle 30 and bearing housing 40, respectively, thus enabling the application of the electromagnetic superconducting hybrid radial magnetic levitation bearing. Of the six degrees of freedom in the spindle 30, only the degree of freedom for rotation about the spindle axis is restricted; the other five degrees of freedom are restricted. The electromagnetic superconducting hybrid radial magnetic levitation bearing is simple to use and can stably levitate rotors with large masses.

[0058] Furthermore, in this invention, as Figure 14 and Figure 15As shown, the two rotor sections 20 of the two electromagnetic superconducting hybrid radial magnetic levitation bearings can be sleeved on the same spindle 30, and the two stator sections 10 are respectively fixed in two bearing seats 40, with the two bearing seats 40 arranged coaxially. The levitation mass can be further improved by using two electromagnetic superconducting hybrid radial magnetic levitation bearings, while also enhancing the levitation stability.

[0059] Furthermore, in this invention, the bearing housing 40 is fixed to the bearing housing fixing platform 60. The bearing housing fixing platform 60 enables stable installation of the bearing housing 40.

[0060] To gain a further understanding of the present invention, the following description is provided in conjunction with... Figures 1 to 15 The electromagnetic superconducting hybrid radial magnetic levitation bearing of the present invention will be described in detail.

[0061] like Figures 1 to 15 As shown, according to a specific embodiment of the present invention, an electromagnetic superconducting hybrid radial magnetic levitation bearing is provided, which includes a stator portion 10 and a rotor portion 20.

[0062] The stator section 10 is fitted outside the rotor section 20 and is used to generate a stator electromagnetic field based on the stator current. The stator section 10 includes a stator base 11 and stator coils 12. The stator base 11 has 16 pole shoes 11a, which are evenly distributed along the circumference of the stator base 11. The stator coils 12 include four stator coil groups: stator coil group 1, stator coil group 2, stator coil group 3, and stator coil group 4. Each stator coil group is wound with four pole shoes 11a in series. The stator current of each of the four stator coil groups can be adjusted independently.

[0063] The rotor section 20 is used to generate a rotor superconducting coil magnetic field based on the rotor current. The rotor superconducting coil magnetic field interacts with the stator electromagnetic field to achieve radial levitation of the rotor section 20 within the stator section 10. The rotor section 20 includes: a superconducting coil 21, a coil frame 22, an inner Dewar 23, an outer Dewar 24, a rotor base 25, a baffle 26, an inner support ring 27, an outer support ring 28, two inner retaining rings 29, and two outer retaining rings 210.

[0064] The superconducting coil 21 is wound on the coil frame 22. The inner Dewar 23 has an annular cavity structure, and the coil frame 22 is placed inside the annular cavity of the inner Dewar 23. The outer Dewar 24 has an annular cavity structure, and the inner Dewar 23 is placed inside the annular cavity of the outer Dewar 24.

[0065] The outer Dewar 24 is sleeved outside the rotor base 25. The baffle 26 is located on one side of the outer Dewar 24 along the rotor axis, and the other side of the outer Dewar 24 along the rotor axis contacts the rotor base 25. The baffle 26 is connected to the rotor base 25.

[0066] The baffle 26 has a vacuum port 26a, a liquid nitrogen injection port 26b, and an excitation port 26c. The vacuum port 26a, the liquid nitrogen injection port 26b, and the excitation port 26c are spaced apart along the circumference of the baffle 26. The vacuum port 26a is connected to the inner Dewar 23 and the outer Dewar 24 to evacuate the space between the inner Dewar 23 and the outer Dewar 24. The liquid nitrogen injection port 26b is connected to the inner Dewar 23 to inject liquid nitrogen into the inner Dewar 23. The excitation port 26c is connected to the inner Dewar 23 to excite the superconducting coil 21 with current.

[0067] The inner support ring 27 is located between the inner wall of the inner Dewar 23 and the inner wall of the outer Dewar 24, and the outer support ring 28 is located between the outer wall of the inner Dewar 23 and the outer wall of the outer Dewar 24. The inner support ring 27 and the outer support ring 28 can fix and support the inner Dewar 23, which has an annular cavity structure, within the annular cavity of the outer Dewar 24.

[0068] Two inner retaining rings 29 are located on both sides of the inner support ring 27 along the rotor axis. The inner retaining rings 29 are located between the inner wall of the inner Dewar 23 and the inner wall of the outer Dewar 24 to restrict the position of the inner support ring 27 along the rotor axis. Two outer retaining rings 210 are located on both sides of the outer support ring 28 along the rotor axis. The outer retaining rings 210 are located between the outer wall of the inner Dewar 23 and the outer wall of the outer Dewar 24 to restrict the position of the outer support ring 28 along the rotor axis.

[0069] In summary, this invention provides an electromagnetic superconducting hybrid radial magnetic levitation bearing. This bearing achieves radial levitation of the rotor within the stator by sequentially arranging a coil frame, superconducting coils, inner Dewar fins, and outer Dewar fins in the rotor section, which cooperate with the stator section. This invention integrates electromagnetic levitation technology with superconducting electric levitation technology, leveraging their complementary advantages. The electromagnetic superconducting hybrid radial magnetic levitation bearing has a simple structure and can be used to stably levitate rotors with large levitation masses. Compared with existing technologies, the technical solution of this invention can solve the technical problems of small levitation mass, poor stability, and complex structure in existing magnetic levitation bearings.

[0070] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0071] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0072] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An electromagnetic superconducting hybrid radial magnetic levitation bearing, characterized in that, The electromagnetic superconducting hybrid radial magnetic levitation bearing includes a stator (10) and a rotor (20). The stator (10) is sleeved outside the rotor (20). The stator (10) is used to generate a stator electromagnetic field according to the stator current. The rotor (20) is used to generate a rotor superconducting coil magnetic field according to the rotor current. The rotor superconducting coil magnetic field and the stator electromagnetic field cooperate to achieve radial levitation of the rotor (20) within the stator (10). The rotor (20) includes: a superconducting coil (21), a coil frame (22), an inner Dewar (23), and an outer Dewar (24). The coil (21) is wound on the coil frame (22). The inner Dewar (23) has an annular cavity structure, and the coil frame (22) is placed inside the annular cavity of the inner Dewar (23). The outer Dewar (24) has an annular cavity structure, and the inner Dewar (23) is placed inside the annular cavity of the outer Dewar (24). The rotor part (20) also includes an inner support ring (27) and an outer support ring (28). The inner support ring (27) is located between the inner wall of the inner Dewar (23) and the inner wall of the outer Dewar (24), and the outer support ring (28) is located between the outer wall of the inner Dewar (23) and the outer wall of the outer Dewar (24).

2. The electromagnetic superconducting hybrid radial magnetic levitation bearing according to claim 1, characterized in that, The rotor section (20) further includes a rotor base (25) and a baffle (26). The outer Dewar (24) is sleeved on the outside of the rotor base (25). The baffle (26) is located on one side of the outer Dewar (24) along the rotor axis. The other side of the outer Dewar (24) along the rotor axis contacts the rotor base (25). The baffle (26) is connected to the rotor base (25).

3. The electromagnetic superconducting hybrid radial magnetic levitation bearing according to claim 2, characterized in that, The baffle (26) has a vacuum port (26a) and a liquid nitrogen injection port (26b). The vacuum port (26a) and the liquid nitrogen injection port (26b) are spaced apart along the circumference of the baffle (26). The vacuum port (26a) is connected to the inner Dewar (23) and the outer Dewar (24) to create a vacuum between the inner Dewar (23) and the outer Dewar (24). The liquid nitrogen injection port (26b) is connected to the inner Dewar (23) to inject liquid nitrogen into the inner Dewar (23).

4. The electromagnetic superconducting hybrid radial magnetic levitation bearing according to claim 3, characterized in that, The baffle (26) also has an excitation port (26c). The vacuum port (26a), the liquid nitrogen injection port (26b) and the excitation port (26c) are arranged circumferentially along the baffle (26). The excitation port (26c) is connected to the inner Dewar (23) to excite the superconducting coil (21) with current.

5. The electromagnetic superconducting hybrid radial magnetic levitation bearing according to claim 1, characterized in that, The rotor section (20) further includes an inner retaining ring (29) and an outer retaining ring (210). The inner retaining ring (29) is located between the inner wall of the inner Dewar (23) and the inner wall of the outer Dewar (24) to restrict the position of the inner support ring (27) along the rotor axis. The outer retaining ring (210) is located between the outer wall of the inner Dewar (23) and the outer wall of the outer Dewar (24) to restrict the position of the outer support ring (28) along the rotor axis.

6. The electromagnetic superconducting hybrid radial magnetic levitation bearing according to claim 5, characterized in that, There are two inner retaining rings (29), which are located on both sides of the inner support ring (27) along the rotor axis; there are two outer retaining rings (210), which are located on both sides of the outer support ring (28) along the rotor axis.

7. The electromagnetic superconducting hybrid radial magnetic levitation bearing according to any one of claims 1 to 6, characterized in that, The stator section (10) includes a stator base (11) and a stator coil (12). The stator base (11) has multiple pole shoes (11a) that are evenly distributed around the circumference of the stator base (11). The stator coil (12) is wound around the multiple pole shoes (11a) to form a stator electromagnetic field.

8. The electromagnetic superconducting hybrid radial magnetic levitation bearing according to claim 7, characterized in that, The stator base (11) has 8.2 p Each pole shoe (11a) has a pole shoe, where p = 0, 1, 2, ...

9. The electromagnetic superconducting hybrid radial magnetic levitation bearing according to claim 8, characterized in that, The stator coil (12) includes q groups of stator coils, and any one of the stator coil groups is wound Each pole piece (11a) and the stator current of each of the q stator coil groups can be adjusted individually, where q is an integer.

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