Superconducting motor and rotor

Abstract

The application discloses a rotor, which comprises a rotor shell, a rotor shaft, a rotor core, a rotor winding and a cold medium transmission mechanism; the cold medium transmission mechanism comprises a rotating transmission assembly, a stationary transmission assembly and a magnetic fluid sealing assembly; the rotating transmission assembly is installed to one end of the rotor shaft; the stationary transmission assembly is rotationally connected to the rotating transmission assembly; the stationary transmission assembly forms a stationary input channel and a stationary output channel located outside the stationary input channel; the rotating transmission assembly forms a rotating input channel and a rotating output channel located outside the rotating input channel; and the magnetic fluid sealing assembly is located outside the stationary output channel or outside the rotating output channel to seal the gap between the stationary output channel and the rotating output channel. The application also discloses a superconducting motor. In the application, the normal-temperature rotor shaft is adopted, a three-temperature-zone structure is arranged in the rotor, and a sealing structure between the stationary transmission assembly and the rotating transmission assembly is arranged, so that the heat leakage is reduced.

Description

Technical Field

[0001] This application relates to the field of motor technology, and in particular to a superconducting motor and rotor. Background Technology

[0002] High-temperature superconducting phase shifters possess advantages such as high power density, fast reactive power response, and strong voltage regulation capabilities, and are therefore widely researched and applied in new energy power systems. The rotor of a high-temperature superconducting phase shifter is a high-temperature superconducting rotor, typically operating near the 30K temperature range. Currently, there are technical problems with the 30K cold helium superconducting rotor structure, particularly heat leakage issues caused by the shaft and the cold helium transport rotor. Summary of the Invention

[0003] To address the aforementioned issues, this application provides a rotor with low heat leakage and high support reliability.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows: The first aspect of this application provides a rotor, which includes a rotor housing, a rotor shaft, a rotor core, a rotor winding, and a cold medium transmission mechanism; the rotor housing encloses a receiving space; at least a portion of the rotor shaft is located within the receiving space; the rotor core is located within the receiving space and is located outside the rotor shaft; the rotor winding is located within the receiving space and is mounted to the outer surface of the rotor core; at least a portion of the cold medium transmission mechanism is mounted to the rotor shaft; the cold medium transmission mechanism includes a rotating transmission component, a stationary transmission component, and a magnetohydrodynamic sealing component; the rotating transmission component is mounted to one end of the rotor shaft; the stationary transmission component is rotatably connected to the rotating transmission component; the stationary transmission component forms a stationary input channel and a stationary output channel located outside the stationary input channel; the rotating transmission component forms a rotating input channel and a rotating output channel located outside the rotating input channel; the magnetohydrodynamic sealing component is located outside the stationary output channel or outside the rotating output channel to seal the gap between the stationary output channel and the rotating output channel.

[0005] Furthermore, the magnetohydrodynamic sealing assembly includes a magnet fixing part, a magnet, an air extraction channel, and an air extraction component. The magnet is installed on the magnet fixing part, the air extraction channel is formed outside the stationary output channel, and the air extraction component is installed on the air extraction channel. Alternatively, the stationary output channel is sleeved outside the rotating output channel, and the magnet fixing part is installed outside the stationary transmission channel; or the rotating output channel is sleeved outside the stationary output channel, and the magnetohydrodynamic sealing assembly is installed outside the rotating transmission channel.

[0006] Furthermore, the stationary output channel is sleeved on the outside of the rotating output channel, and a first gap is formed between the stationary output channel and the rotating output channel. The magnet fixing part includes an inner fixing part and an outer fixing part installed on the outside of the stationary output channel. The air extraction channel is formed between the inner fixing part and the outer fixing part and is connected to the first gap.

[0007] Furthermore, the rotating output channel is sleeved on the outside of the stationary output channel, forming a second gap between the rotating output channel and the stationary output channel. The magnet fixing part includes an inner fixing part and an outer fixing part installed on the outside of the rotating output channel. The air extraction channel forms outside the stationary output channel and connects to the second gap.

[0008] Furthermore, the rotary transmission assembly includes a rotary input cylinder with a rotary input channel formed inside it, and the stationary transmission assembly includes a stationary input cylinder with a stationary input channel formed inside it; the end of the stationary input cylinder includes an extension and a contraction, the extension being located outside the rotary input cylinder, and at least a portion of the contraction being located inside the rotary input cylinder.

[0009] Furthermore, the rotary transmission assembly also includes a support bearing located between the rotary input cylinder and the extension; and / or the inner side of the extension of the stationary input cylinder is further formed with several axially distributed elastic annular portions.

[0010] Furthermore, an annular groove is formed on the inner side of the extension of the stationary input cylinder, and the stationary transmission assembly also includes a support sealing ring, which is installed in the annular groove; a number of fixing protrusions are formed in the annular groove, and a number of fixing grooves corresponding to the fixing protrusions are formed on the outer side of the support sealing ring.

[0011] Furthermore, a sealing protrusion is formed on the inner side of the support sealing ring, and the sealing protrusion abuts against the outer side of the rotary input cylinder.

[0012] Furthermore, the stationary transmission component also forms a stationary inner vacuum layer and a stationary outer vacuum layer, with the stationary inner vacuum layer located between the stationary input channel and the stationary output channel, and the stationary outer vacuum layer located outside the stationary output channel; the rotary transmission component also forms a rotary inner vacuum layer and a rotary outer vacuum layer, with the rotary inner vacuum layer located between the rotary input channel and the rotary output channel, and the rotary outer vacuum layer located outside the rotary output channel.

[0013] A second aspect of this application also provides a superconducting motor, which includes a motor stator and the aforementioned rotor.

[0014] This application employs a room-temperature shaft and incorporates a three-temperature zone structure within the rotor. By establishing an intermediate temperature zone between the rotor winding's temperature zone and the room-temperature shaft, heat leakage generated by the rotor winding through the room-temperature shaft is reduced. Simultaneously, a sealing structure between the stationary and rotating transmission components further minimizes heat leakage between them. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the motor rotor in the first embodiment of this application; Figure 2 This is a cross-sectional view of the motor rotor perpendicular to the axis in the first embodiment of this application; Figure 3 This is a cross-sectional view of the motor rotor along the axial direction in the first embodiment of this application; Figure 4 for Figure 3 Enlarged structural diagram at point A; Figure 5 This is an exploded view of the internal components of the motor rotor in the first embodiment of this application. From top to bottom, they are the rotor shaft, the first heat insulation layer, the first inner sealing layer, the third heat insulation layer, the first outer sealing layer, the second heat insulation layer, the second inner sealing layer, and the rotor core. Figure 6 This is a cross-sectional view of the fixing column in the first embodiment of this application; Figure 7 for Figure 3 Enlarged structural diagram at point B; Figure 8 This is a schematic diagram of the structure of the rotating transmission component in the first embodiment of this application; Figure 9 This is a cross-sectional view of the rotating transmission component in the first embodiment of this application; Figure 10 This is a schematic diagram of a first connection structure between the rotating transmission component and the stationary transmission component in the first embodiment of this application; Figure 11 for Figure 10 Enlarged structural diagram at point C; Figure 12 This is a schematic diagram of a second connection structure between the rotating transmission component and the stationary transmission component in the first embodiment of this application; Figure 13 for Figure 12 Enlarged schematic diagram of the structure at point D. Detailed Implementation

[0016] To enable those skilled in the art to better understand the present application, the technical solutions in specific embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

[0017] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature.

[0018] The superconducting motor includes a motor rotor, a motor stator, and a motor housing. The motor stator is fixed inside the motor housing, and the motor rotor passes through the motor stator. The motor stator is sleeved on the outside of the motor rotor, and the positions of the motor stator and the motor rotor are matched. A rotatable connection is formed between the motor rotor and the motor housing.

[0019] The specific embodiments of this application provide a detailed description and explanation of the motor rotor in a superconducting motor.

[0020] In the description of this application, it should also be understood that the motor rotor involved in this application has a rotor shaft. Unless otherwise specified in the description of this application, "axial" refers to the direction extending along the rotation axis of the rotor shaft, "radial" refers to the direction perpendicular to the rotation axis of the rotor shaft, and "circumferential" refers to the direction around the rotation axis of the rotor shaft. In the axial direction, "inner" or "inner side" refers to the side closer to the superconducting motor, and "outer" or "outer side" refers to the side away from the superconducting motor. In the radial direction, "inner" or "inner side" refers to the side closer to the axis of the rotor shaft, and "outer" or "outer side" refers to the side away from the axis of the rotor shaft. Furthermore, if a part has a hollow cavity, the "inner side" of the part refers to the part disposed inside the hollow cavity, and the "outer side" of the part refers to the part disposed outside the hollow cavity.

[0021] One aspect of this application provides, as Figures 1 to 13 The motor rotor 100 in the first embodiment shown.

[0022] like Figure 1 and Figure 2 As shown, the motor rotor 100 in the first embodiment of this application includes a rotor shaft 11 located at the center. Outside the rotor shaft 11, from the inside out, it includes a first inner sealing layer 121, a first outer sealing layer 122, a second inner sealing layer 131, a rotor core 15, a rotor winding 18, and a second outer sealing layer 132. A heat insulation layer 14 may also be provided in the above-mentioned layer structure as needed. Specifically, the heat insulation layer 14 may include a first heat insulation layer 141 disposed between the rotor shaft 11 and the first inner sealing layer 121, and a second heat insulation layer 142 disposed between the first outer sealing layer 122 and the second inner sealing layer 131.

[0023] In this embodiment, the rotor shaft 11 is at room temperature, forming a room temperature zone. Related technologies include solutions using low-temperature shafts. While low-temperature shafts offer advantages such as simple structure and ease of manufacturing, the difficulty in implementing insulation structures in the shaft area makes it prone to severe heat leakage. This embodiment uses a room-temperature shaft, eliminating the temperature difference between the rotor shaft 11 and the ambient temperature, thus resolving the heat leakage problem caused by the rotor shaft 11.

[0024] A space is formed between the first inner sealing layer 121 and the first outer sealing layer 122, which can be filled with a first cooling medium. After the first cooling medium is filled into this space, a first low-temperature zone is formed within the motor rotor 100. A space is formed between the second inner sealing layer 131 and the second inner sealing layer 132, which can be filled with a second cooling medium. After the second cooling medium is filled into this space, a second low-temperature zone is formed within the motor rotor 100. The temperatures in the room temperature zone, the first low-temperature zone, and the second low-temperature zone decrease sequentially. The second low-temperature zone has a relatively lower temperature and is used to enable superconductivity in the rotor winding 18 of the motor rotor 100. If the second low-temperature zone and the room temperature zone are directly adjacent, due to the large temperature difference between the two zones, severe heat leakage is likely to occur, making it difficult to maintain the low-temperature environment in the second low-temperature zone, or requiring higher costs to maintain the low-temperature environment in the second low-temperature zone. In this embodiment, three temperature zones are set up. Specifically, a first low-temperature zone is set up between the room temperature zone and the second low-temperature zone. Setting up three temperature zones with a certain temperature gradient can reduce the temperature difference between adjacent temperature zones, alleviate the heat leakage phenomenon between adjacent temperature zones, and avoid the serious heat leakage problem caused by the second low-temperature zone for achieving superconductivity being directly adjacent to the room temperature layer.

[0025] Meanwhile, a first heat insulation layer 141 is provided between the normal temperature zone and the first low temperature zone, i.e., between the rotor shaft 11 and the first inner sealing layer 121; a second heat insulation layer 142 is provided between the first low temperature zone and the second low temperature zone, i.e., between the first outer sealing layer 122 and the second inner sealing layer 131. The first heat insulation layer 141 and the second heat insulation layer 142 can further reduce heat transfer between adjacent temperatures, further reducing heat leakage. The first heat insulation layer 141 and the second heat insulation layer 142 can be made of the same heat insulation material, or a heat insulation layer 14 that is compatible but has certain differences in material composition can be selected according to the temperature difference between the two different temperature zones. Furthermore, the thickness and shape of the first heat insulation layer 141 and the second heat insulation layer 142 can be the same, or, based on actual conditions and requirements such as strength and connection stability, a heat insulation layer 14 that is compatible but has certain differences in thickness and shape can be selected. However, due to factors such as cost, the first insulation layer 141 and the second insulation layer 142 are preferably insulation layers 14 with the same insulation material and the same thickness.

[0026] Furthermore, a third heat insulation layer 143 can be provided inside the first outer sealing layer 122, and the third heat insulation layer 143 is basically in close contact with the first outer sealing layer 122. The third heat insulation layer 143 and the second heat insulation layer 142 are basically located on the inner and outer sides of the first outer sealing layer 122. The third heat insulation layer 143 can further increase the thermal resistance between the second low temperature zone and the first low temperature zone. At the same time, the third heat insulation layer 143 and the second heat insulation layer 142 cooperate with each other to further isolate the heat transfer between the first outer sealing layer 122 and the second heat insulation layer 142.

[0027] Specifically, at least one of the first insulation layer 141, the second insulation layer 142, or the third insulation layer 143 may be made of resin materials, including epoxy resin.

[0028] A first heat-insulating vacuum layer 144 can be formed between the rotor shaft 11 and the first heat-insulating layer 141, and a second heat-insulating vacuum layer 145 can be formed between the second heat-insulating layer 142 and the first outer sealing layer 122. The first heat-insulating vacuum layer 144 is located between the normal temperature zone and the first low temperature zone. The first heat-insulating vacuum layer 144 can basically isolate the heat transfer between the rotor shaft 11 and the first heat-insulating layer 141, and can further isolate the heat transfer between the normal temperature zone and the first low temperature zone, thus achieving heat insulation in most areas between the first low temperature zone and the normal temperature zone. The second heat-insulating vacuum layer 145 is located between the first low temperature zone and the second low temperature zone. The second heat-insulating vacuum layer 145 can basically isolate the heat transfer between the first outer sealing layer 122 and the second heat-insulating layer 142, and can further isolate the heat transfer between the first low temperature zone and the second low temperature zone, thus achieving heat insulation in most areas between the second low temperature zone and the first low temperature zone.

[0029] In this embodiment, by setting three temperature zones and simultaneously setting a heat insulation layer 14 between adjacent temperature zones and forming a corresponding vacuum layer, not only can the temperature difference between each temperature zone be reduced, and heat leakage can be reduced by reducing the temperature gradient, but heat transfer can also be further reduced through the heat insulation layer 14 and the formed vacuum layer. This basically solves the serious heat leakage problem that easily occurs in the motor rotor 100 of the existing superconducting motor, and reduces the efficiency and cost of forming a stable low temperature environment in the second low temperature zone.

[0030] The first inner sealing layer 121 and the first outer sealing layer 122 enclose a first sealed container 12, which is filled with a first cooling medium, forming a first low-temperature zone. The second inner sealing layer 131 and the second outer sealing layer 132 enclose a second sealed container 13, in which components such as a rotor core 15 and a rotor winding 18 can be installed. A second cooling medium of a corresponding temperature can be introduced into the second sealed container 13 around the rotor core 15 and the rotor winding 18, keeping them at a low temperature to achieve superconductivity.

[0031] Furthermore, a second cooling medium can be used according to the temperature at which the superconducting material achieves superconductivity. This second cooling medium cools the rotor core 15 and rotor winding 18 to the corresponding superconducting temperature. Similarly, a first cooling medium with a temperature between the second cooling medium and room temperature is selected. By creating a temperature gradient between the second cooling medium and room temperature using the first cooling medium, the temperature difference between adjacent temperature zones can be reduced, mitigating heat leakage between adjacent temperature zones and avoiding severe heat leakage problems caused by the direct proximity of the second low-temperature zone for achieving superconductivity to the room temperature layer.

[0032] Specifically, the second cooling medium can be cold helium gas, so that the second low-temperature zone and the rotor core 15 and rotor winding 18 in the second low-temperature zone can be basically in a low-temperature environment of 30K during operation; while the first cooling medium can be liquid nitrogen, so that the first low-temperature zone can be basically in a low-temperature environment of 77K during operation, buffering the temperature difference between the second low-temperature zone and the normal temperature environment, and reducing the heat leakage phenomenon of the second low-temperature zone.

[0033] In addition, such as Figure 3As shown, several end plates are provided at both ends of the motor rotor 100. These end plates are interconnected with components such as the first inner sealing layer 121, the first outer sealing layer 122, the second inner sealing layer, and the second outer sealing layer to form a complete tank structure, thereby realizing the aforementioned first low-temperature zone and second low-temperature zone. Specifically, each end of the motor rotor 100 includes a first end plate 123, which is basically annular. The first end plate 123 is connected between the first inner sealing layer 121 and the first outer sealing layer 122. The first end plate 123, the first inner sealing layer 121, and the first outer sealing layer 122 are interconnected to form a complete first sealed tank 12 body. After the first cooling medium is introduced into the first sealed tank 12 body, the first low-temperature zone is formed. Similarly, the two ends of the motor rotor 100 also include a second end plate 133, which is also basically circular. The inner diameter of the second end plate 133 is greater than or equal to the outer diameter of the first end plate 123. The second end plate 133 is connected between the second inner sealing layer and the second outer sealing layer. The second end plate 133, the second inner sealing layer and the second outer sealing layer are interconnected to form a complete second sealing tank 13 body. After the second cooling medium is introduced into the second sealing tank 13 body, a second low temperature zone is formed.

[0034] As an optional implementation method, such as Figure 3 As shown, the motor rotor 100 in the first embodiment of this application further includes a rotor housing 16, which is disposed on the outermost layer of the motor rotor 100. The rotor housing 16 includes a rotor shell layer 161 and rotor end plates 162. The rotor end plates 162 are connected to both ends of the rotor housing 16, and the outer end plates on both sides are connected to the rotor shell layer 161 to form the rotor housing 16. The rotor housing 16 is sleeved on the outside of the first sealed container 12 and the second sealed container 13, and a rotor vacuum layer 163 is formed between the rotor housing 16 and the first sealed container 12 and the second sealed container 13.

[0035] like Figure 4As shown, the rotor shell 161 includes a support layer 1611, a shell sealing layer 1612, a shielding layer 1613, and a reinforcing layer 1614. The rotor sealing layer can be connected to the outer end plate to form a sealed rotor shell 16. The support layer 1611 fills the vacuum layer between the shell sealing layer 1612 and the second outer sealing layer 132. The support layer 1611 has a porous structure and is made of a material with low thermal conductivity. The support layer 1611, filled in the above-mentioned position, can support the shell sealing layer 1612 and prevent the outer shell sealing layer 1612 and other structures from collapsing due to the vacuum environment. At the same time, the support layer 1611 has low thermal conductivity, which, in conjunction with the vacuum environment it is in, can block the path of heat leakage from the second low-temperature zone to the outside, further reducing the heat leakage of the second low-temperature zone. Specifically, the support layer 1611 can adopt a hexagonal honeycomb structure. The hexagonal honeycomb structure possesses high mechanical strength and support capacity, enabling it to support the outer sealing layer in a vacuum environment and preventing collapse of the outer sealing layer and other structures due to the vacuum environment. The shielding layer 1613 protects the superconducting coil 181 from the influence of external harmonic armature magnetic fields. Specifically, the shielding layer 1613 can be a thin layer of metal material, such as a thin layer of copper. The reinforcing layer 1614 secures the shielding layer 1613, preventing it from radially detaching due to centrifugal force during motor rotor 100 operation, thus improving the operational stability of the motor rotor 100. Specifically, the reinforcing layer 1614 can be a carbon fiber layer with high tensile strength.

[0036] As an optional implementation method, such as Figure 2 and Figure 5 As shown, in the motor rotor 100 of the first embodiment of this application, the rotor shaft 11, the first heat insulation layer 141, the first inner sealing layer 121, the first outer sealing layer 122, the second heat insulation layer 142, the second inner sealing layer 131 and the rotor core 15 are fixed together by means of a tooth structure and a groove structure cooperating with each other.

[0037] A plurality of shaft protrusions 111 are formed on the outer side of the rotor shaft 11, and a plurality of first heat insulation grooves 1411 are formed on the inner side of the first heat insulation layer 141, which are matched with the shaft protrusions 111 on the outer side of the rotor shaft 11. The first heat insulation layer 141 is sleeved on the outer side of the rotor shaft 11 and fixed to the rotor shaft 11 by the protrusion structure and the groove structure. After the groove structure on the inner side of the first heat insulation layer 141 and the protrusion structure on the outer side of the rotor shaft 11 cooperate with each other, it can not only fix the first heat insulation layer 141 and the rotor shaft 11 to each other, but also realize the transmission of force and torque between the rotor shaft 11 and the first heat insulation layer 141. Furthermore, in order to better connect the rotor shaft 11 and the first heat insulation layer 141, a number of shaft protrusions 111 are provided in both the circumferential and axial directions of the rotor shaft 11. The number of shaft protrusions 111 are evenly distributed on the rotor shaft 11, and corresponding first heat insulation grooves 1411 are provided on the inner side of the first heat insulation layer 141 to match them.

[0038] Similarly, a number of evenly distributed first heat-insulating protrusions 1412 are formed on the outer side of the first heat-insulating layer 141, and a first inner sealing groove 1211 corresponding to the first heat-insulating protrusions 1412 on the outer side of the first heat-insulating layer 141 is formed on the inner side of the first inner sealing layer 121. After the first inner sealing layer 121 is fitted onto the outer side of the first heat-insulating layer 141, the first heat-insulating protrusions 1412 on the outer side of the first heat-insulating layer 141 and the first inner sealing groove 1211 on the inner side of the first inner sealing layer 121 cooperate with each other to realize the transmission of force and torque.

[0039] Similarly, a first inner sealing tooth 1212 is formed on the outer side of the first inner sealing layer 121, a first outer sealing groove 1221 and a first outer sealing tooth 1222 are formed on the inner and outer sides of the first outer sealing layer 122, a second heat insulation groove 1421 and a second heat insulation tooth 1422 are formed on the inner and outer sides of the second heat insulation layer 142, a second inner sealing groove 1311 and a second inner sealing tooth 1312 are formed on the inner and outer sides of the second inner sealing layer 131, and a core groove 151 is formed on the inner side of the rotor core 15. After the above arrangement, the rotor shaft 11, the first heat insulation layer 141, the first inner sealing layer 121, the first outer sealing layer 122, the second heat insulation layer 142, the second inner sealing layer 131, and the rotor core 15 are fixed together by the cooperation of the tooth structure and the groove structure, and the force and torque are transmitted.

[0040] Furthermore, the aforementioned tooth structures located on the outer surfaces of the rotor shaft 11, the first heat insulation layer 141, the first inner sealing layer 121, the first outer sealing layer 122, the second heat insulation layer 142, and the second inner sealing layer 131 can, in the axial direction, form continuous, complete, and axially extending teeth, or form several independent teeth distributed along the axial direction. Additionally, continuous, complete, and axially extending teeth can be formed on some components, while several independent teeth distributed along the axial direction can be formed on other components. The tooth structures and groove structures between adjacent layers can cooperate to fix each layer in the circumferential direction.

[0041] As an optional implementation method, such as Figure 5 As shown, in the first embodiment of this application, the rotor shaft 11 is a complete integral structure. This integral design allows the rotor shaft 11 to withstand greater forces and torques, improving the performance and reliability of the motor rotor 100. Furthermore, within the motor rotor 100, there are two low-temperature zones between the rotor shaft 11 and the second outer sealing layer 132. These zones are filled with a first cooling medium and a second cooling medium. By making the rotor shaft 11 and the second outer sealing layer 132 complete integral structures, the sealing performance of the motor rotor 100 is improved, thermal resistance is increased, heat leakage within the motor rotor 100 is reduced, and the insulation effect of the motor rotor 100 is enhanced.

[0042] The first heat insulation layer 141 includes a plurality of first heat insulation portions 1413, which are arranged axially to form the first heat insulation layer 141. The first heat insulation layer 141 is located between a normal temperature zone and a first low temperature zone. During the operation of the motor rotor 100, the first heat insulation layer 141 undergoes a state change process from normal temperature to low temperature, during which the first heat insulation layer 141 experiences a shrinkage phenomenon. That is, due to the principle of thermal expansion and contraction, the first heat insulation layer 141 shrinks in volume when it changes from a normal temperature state to a low temperature state, especially in the axial direction of the first heat insulation layer 141 and the second heat insulation layer 142. This axial volume shrinkage results in a significant change in the overall size of the first heat insulation layer 141, affecting the mutual fixation between the first heat insulation layer 141 and the rotor shaft 11 and the first inner sealing layer 121. It also poses a risk of breakage to the first heat insulation layer 141 itself, adversely affecting the reliability of the motor rotor 100. Dividing the first heat insulation layer 141 axially into several first heat insulation portions 1413 allows for the even distribution of the overall shrinkage amount of the first heat insulation layer 141 by utilizing the separation between these portions, thus reducing the overall dimensional change of the first heat insulation layer 141 during shrinkage. The smaller shrinkage amount of each first heat insulation portion 1413 also reduces the positional offset caused by shrinkage, improving the stability of the first heat insulation layer 141 between it and the rotor shaft 11 and the first inner sealing layer 121, thereby enhancing the stability of the motor rotor 100.

[0043] The second heat insulation layer 142 is also configured similarly to the first heat insulation layer 141, comprising a plurality of second heat insulation portions 1423, which are arranged along the axis to form the second heat insulation layer 142. This configuration improves the stability of the fixation between the second heat insulation layer 142 and the first outer sealing layer 122 and the second inner sealing layer 131, thereby enhancing the stability of the motor rotor 100.

[0044] After the first insulation layer 141 and the second insulation layer 142 are configured as described above, they can achieve the function of heat insulation. The gaps generated after the cold shrinkage of each part have little impact on the heat insulation function. At the same time, they can also solve the problems of heat leakage and mechanical strength caused by the large changes in the overall cold shrinkage size.

[0045] For the motor rotor 100 with the third heat insulation layer 143, the third heat insulation layer 143 is also configured as the first heat insulation layer 141 and the second heat insulation layer 142, and the third heat insulation layer 143 is formed by arranging a plurality of third heat insulation parts 1433 along the axial direction.

[0046] Similarly, the rotor core 15 includes a plurality of rotor core portions 152, which are arranged axially to form the rotor core 15.

[0047] The first inner sealing layer 121 includes a plurality of first inner sealing portions 1213, which are arranged axially to form the first inner sealing layer 121. Adjacent first inner sealing portions 1213 are connected by first inner corrugated portions 1214. The first inner sealing layer 121 is integrally formed, or the first inner sealing portions 1213 and the first inner corrugated portions 1214 in the first inner sealing layer 121 are connected by welding, so that the first inner sealing layer 121 forms a complete whole. The first inner corrugated portions 1214 have a certain degree of freedom of expansion and contraction in the axial direction. When the dimensions of the first inner sealing portions 1213 decrease due to cold shrinkage, the first inner corrugated portions 1214 can be stretched to compensate for the amount of cold shrinkage of the first inner sealing portions 1213. By connecting adjacent sealing portions through the first inner corrugated portion 1214, the problem of shrinkage due to temperature changes can be solved, ensuring that the axial dimension of the first inner sealing layer 121 remains essentially unchanged. This is beneficial to the stability of the first inner sealing layer 121 itself, as well as the connection stability between the first inner sealing layer 121 and the adjacent first heat insulation layer 141 and second heat insulation layer 142. At the same time, providing the first inner corrugated portion 1214 between adjacent first inner sealing portions 1213 can also improve the sealing performance of the first inner sealing layer 121, preventing the first cooling medium located therein from leaking at the first inner sealing layer 121 and reducing heat leakage.

[0048] The first outer sealing layer 122, the second inner sealing layer 131, and the second outer sealing layer 132 also adopt a design similar to that of the first inner sealing layer 121. Specifically, the first outer sealing layer 122 includes a plurality of first outer sealing portions 1223 and first outer corrugated portions 1224. The plurality of first outer sealing portions 1223 are arranged axially, and adjacent first outer sealing portions 1223 are connected by the first outer corrugated portions 1224. Similarly, the second inner sealing layer 131 includes a plurality of second inner sealing portions 1313 and second inner corrugated portions 1314. The plurality of second inner sealing portions 1313 are arranged axially, and adjacent second inner sealing portions 1313 are connected by the second inner corrugated portions 1314. The second outer sealing layer 132 includes a plurality of second outer sealing portions 1321 and second outer corrugated portions 1322. The plurality of second outer sealing portions 1321 are arranged axially, and adjacent second outer sealing portions 1321 are connected by the second outer corrugated portions 1322.

[0049] As an optional implementation method, such as Figure 5As shown, in the first embodiment of this application, each of the first heat insulation portions 1413 of the first heat insulation layer 141 forms a first heat insulation hole 1414, and each of the second heat insulation portions 1423 of the second heat insulation layer 142 forms a second heat insulation hole 1424. Similarly, each of the first inner sealing portions 1213 of the first inner sealing layer 121 forms a first inner sealing hole 1215, each of the first outer sealing portions 1223 of the first outer sealing layer 122 forms a first outer sealing hole 1225, each of the first inner sealing portions 1213 of the second inner sealing layer 131 forms a second inner sealing hole 1315, and each of the rotor core portions 152 of the rotor core 15 also forms a core fixing hole 153 on its inner side.

[0050] The outer surface of the rotor shaft 11 forms several shaft fixing holes 112 corresponding to the aforementioned fixing channels, and the inner surface of each rotor core portion 152 of the rotor core 15 forms a core fixing hole 153 corresponding to the aforementioned fixing channels. The shaft fixing holes 112 of the rotor shaft 11 are blind holes facing outwards and not penetrating, while the core fixing holes 153 of the rotor core 15 are blind holes facing inwards or through holes.

[0051] In the motor rotor 100, the rotor shaft fixing hole 112 of the rotor shaft 11, the first heat insulation hole 1414 of the first heat insulation layer 141, the first inner sealing hole 1215 of the first inner sealing layer 121, the first outer sealing hole 1225 of the first outer sealing layer 122, the second heat insulation hole 1424 of the second heat insulation layer 142, the second inner sealing hole 1315 of the second inner sealing layer 131, and the core fixing hole 153 of the rotor core 15 are interconnected to form a fixing channel, and a number of fixed channels are formed in an array in the axial and circumferential directions of the motor rotor 100.

[0052] The motor rotor 100 also includes several fixing posts 17, which are inserted into the fixing channel to fix the rotor shaft 11, the first heat insulation layer 141, the first inner sealing layer 121, the first outer sealing layer 122, the second heat insulation layer 142, the second inner sealing layer 131 and the rotor core 15 together to form a complete whole, thereby improving the reliability of force and torque transmission between the above components.

[0053] Furthermore, the outer surface of each first heat insulation part 1413 includes a complete first heat insulation protrusion 1412, and the first heat insulation hole 1414 of the first heat insulation part 1413 is configured to penetrate through the center of the first heat insulation protrusion 1412. The area where the first heat insulation protrusion 1412 of the first heat insulation part 1413 is located has a relatively large thickness. Setting the first heat insulation hole 1414 at the first heat insulation protrusion 1412 can minimize the impact on the overall mechanical strength of the first heat insulation part 1413, and at the same time ensure the connection strength and reliability between the fixing post 17 and the first heat insulation part 1413 after the fixing post 17 passes through the first heat insulation hole 1414.

[0054] Similarly, the second heat insulation part 1423, the first inner sealing part 1213, the first outer sealing part 1223, and the second inner sealing part 1313 can also adopt a similar arrangement to the first heat insulation part 1413, with corresponding toothed structures and fixing hole structures. That is, the outer surface of each second heat insulation part 1423, each first inner sealing part 1213, each first outer sealing part 1223, and each second inner sealing part 1313 includes a complete toothed structure, and the fixing hole structure is configured to penetrate the center of the toothed structure.

[0055] As an optional implementation method, such as Figure 6 and Figure 7 As shown, the fixing column 17 in the first embodiment of this application includes an inner cylinder 171, a middle cylinder 172, an outer cylinder 173, and a filling column 174. In the radial direction, the inner cylinder 171, middle cylinder 172, outer cylinder 173, and filling column 174 are arranged sequentially from the inside to the outside, with the lengths of the inner cylinder 171, middle cylinder 172, outer cylinder 173, and filling column 174 increasing sequentially. One end of the middle cylinder 172 is located inside the inner cylinder 171, and the other end of the middle cylinder 172 protrudes from the inner cylinder 171. One end of the outer cylinder 173 is located inside the middle cylinder 172, and the other end of the outer cylinder 173 protrudes from the middle cylinder 172. One end of the filling column 174 is filled inside the outer cylinder 173, and the other end of the filling column 174 protrudes from the outer cylinder 173 and is used to connect to the rotor core 15.

[0056] At least a portion of the inner cylinder 171 is welded and fixed to the first inner sealing layer 121, at least a portion of the middle cylinder 172 is welded and fixed to the first outer sealing layer 122, and at least a portion of the outer cylinder 173 is welded and fixed to the second inner sealing layer 131. Specifically, the outer end of the inner cylinder 171 is welded to the first inner sealing layer 121, the outer end of the middle cylinder 172 is welded to the first outer sealing layer 122, and the outer end of the outer cylinder 173 is welded to the second inner sealing layer 131. More specifically, the sidewall of the inner cylinder 171 is welded to the first inner sealing hole 1215 in the first inner sealing layer 121, the sidewall of the middle cylinder 172 is welded to the first outer sealing hole 1225 in the first outer sealing layer 122, and the sidewall of the outer cylinder 173 is welded to the second inner sealing hole 1315 in the second inner sealing layer 131.

[0057] As an optional implementation, the inner cylinder 171 and the middle cylinder 172, as well as the middle cylinder 172 and the outer cylinder 173, can be configured to fit together. This fit between the inner cylinder 171 and the middle cylinder 172, and between the middle cylinder 172 and the outer cylinder 173, eliminates gaps between them, increases the strength of the fixing column 17, and enhances the reliability and stability of force and torque transmission between the components after the fixing column 17 is connected.

[0058] As another optional implementation, a certain gap can be configured between the inner cylinder 171 and the middle cylinder 172, and between the middle cylinder 172 and the outer cylinder 173. This gap between the inner cylinder 171 and the middle cylinder 172 increases the thermal resistance between them, preventing heat transfer and reducing heat leakage. Similarly, the gap between the middle cylinder 172 and the outer cylinder 173 increases the thermal resistance between them, preventing heat transfer and reducing heat leakage. The gaps between the inner cylinder 171 and the middle cylinder 172, and between the middle cylinder 172 and the outer cylinder 173, can be further configured to a vacuum state, further increasing the thermal resistance between the inner cylinder 171, the middle cylinder 172 and the outer cylinder 173, further reducing heat transfer, and further reducing the cold leakage phenomenon between the outer cylinder 173, the middle cylinder 172 and the inner cylinder 171.

[0059] Furthermore, thermal insulation material can be filled into the gaps between the inner cylinder 171 and the middle cylinder 172, and between the middle cylinder 172 and the outer cylinder 173. Filling the gaps between the inner cylinder 171, the middle cylinder 172, and the outer cylinder 173 with thermal insulation material can both eliminate the gaps inside the fixing column 17 and increase the overall strength of the fixing column 17, and also increase the thermal resistance between the outer cylinder 173, the middle cylinder 172, and the inner cylinder 171, reducing heat transfer between them. Even further, the thermal insulation material filled in the aforementioned gaps can be epoxy resin, polytetrafluoroethylene resin, or fiberglass, etc.

[0060] A portion of the filling column 174 is filled inside the outer cylinder 173, and the outer end of the filling column 174 protrudes from the outer cylinder 173. A fixing bolt 175 is also installed on the outer end face of the filling column 174, which can fix the fixing column 174 and the rotor core 15 to each other. The filling column 174 fills the inside of the outer cylinder 173, which can enhance the overall strength of the outer cylinder 173, thereby improving the overall strength of the fixing column 17. At the same time, the fixing bolt 175 at the outer end of the filling column 174 can realize the connection between the fixing column 17 and the rotor core 15 and fix the fixing column 17 in the fixing channel, fixing the rotor shaft 11, the first heat insulation layer 141, the first inner sealing layer 121, the first outer sealing layer 122, the second heat insulation layer 142, the second inner sealing layer 131 and the rotor core 15 together to form a complete whole.

[0061] Furthermore, the filler column 174 is made of thermal insulation material. Using thermal insulation material for the filler column 174 further increases thermal resistance and reduces heat transfer through the fixed column 17. Even further, the thermal insulation material for the filler column 174 can be fiberglass. Fiberglass material possesses both good mechanical properties such as strength, enabling better transmission of force and torque, and good thermal insulation performance.

[0062] As an optional implementation method, such as Figure 8 and Figure 9 As shown, the electronic rotor 100 in the first embodiment of this application includes a cold medium transfer mechanism 19, which is used to transfer a second cooling medium into the motor rotor 100. The cold medium transfer mechanism 19 includes a rotating transfer component 191 and a stationary transfer component 193.

[0063] At least a portion of the rotary transmission assembly 191 is fixed to the rotor shaft 11, and the rotary transmission assembly 191 rotates together with the rotor shaft 11 during the operation of the superconducting motor. The rotary transmission assembly 191 includes a rotary input cylinder 1911, a rotary inner partition cylinder 1912, a rotary output cylinder 1913, and a rotary outer protective cylinder 1914, all coaxially arranged. The rotary inner partition cylinder 1912 is sleeved on the outside of the rotary input cylinder 1911, the rotary output cylinder 1913 is sleeved on the outside of the rotary inner partition cylinder 1912, and the rotary outer protective cylinder 1914 is sleeved on the outside of the rotary output cylinder 1913. The rotary input cylinder 1911 is coaxially arranged with the rotor shaft 11. A rotary input channel 1915 is formed inside the rotary input cylinder 1911. A rotary output channel 1916 is formed between the rotary output cylinder 1913 and the rotary inner partition cylinder 1912. A rotary inner vacuum layer 1917 is formed between the rotary inner partition cylinder 1912 and the rotary input cylinder 1911. A rotary outer vacuum layer 1918 is formed between the rotary outer protective cylinder 1914 and the rotary output cylinder 1913.

[0064] The rotary transmission assembly 191 also includes several medium input pipes 1919 and several medium output pipes 1921. One end of the medium input pipe 1919 passes through the outer protective cylinder, the output cylinder, the inner partition cylinder and the input cylinder in sequence and is connected to the rotary input channel 1915. The other end of the medium input pipe 1919 is connected to the medium inlet groove 1826 of the coil fixing seat 182. At least a portion of the medium input pipe 1919 is also fixed to the coil fixing seat 182 through the circulation fixing hole 1824a on the bracket fixing plate 1824 in the coil fixing seat 182.

[0065] One end of the medium output pipe 1921 passes through the outer protective cylinder and the output cylinder in sequence and is connected to the rotary output channel 1916. The other end of the medium output pipe 1921 is connected to the medium outlet groove 1827 of the coil fixing seat 182.

[0066] Several rotating support members 1922 are also provided between the rotating inner partition 1912 and the rotating output cylinder 1913. A rotating output channel 1916 is formed between the rotating inner partition 1912 and the rotating output cylinder 1913. In order to output the utilized second cooling medium output from inside the motor rotor 100 from the rotating output channel 1916, the rotating output cylinder 1913 can only be connected to the rotating inner partition 1912 at one end, and the connection between the rotating output cylinder 1913 and the rotating inner partition 1912 is relatively weak. The rotating support members 1922 provided in the rotating output channel without affecting the output of the second cooling medium can enhance the structural strength of the rotating output channel 1916, and also enhance the overall mechanical strength of the rotating transmission assembly 191.

[0067] The rotating inner vacuum layer 1917 can further isolate the heat transfer between the rotating input channel 1915 and the rotating output channel 1916, preventing the second cooling medium in the rotating input channel 1915 from being heated by the second cooling medium in the rotating output channel 1916, thus improving the cooling efficiency of the second cooling medium during operation. The rotating outer vacuum layer 1918 can also isolate the heat transfer between the rotating output channel 1916 and the outside air, preventing the second cooling medium in the rotating output channel 1916 from being heated by the outside air, so that the second cooling medium in the rotating output channel 1916 remains at a low temperature, which can further reduce the heat leakage of the second cooling medium in the rotating input channel 1915.

[0068] The outer end of the rotating inner baffle 1912 is also formed with a rotating guide section 1912a. The rotating guide section 1912a can guide the outflow direction of the second cooling medium in the rotating output channel 1916, increase the flow resistance of the second cooling medium in the gap between the rotating transmission assembly 191 and the stationary transmission assembly 193, and reduce the leakage of the second cooling medium in this part.

[0069] One end of the rotor shaft 11 forms a mounting chamber 113, in which at least a portion of the rotary transmission assembly 191 is located. An input port 1131 and an output port 1132 are formed in the mounting chamber 113. A medium input pipe 1919 in the rotary transmission assembly 191 passes through the input port 1131 and communicates with the coil mounting base 182. A medium output pipe 1921 in the rotary transmission assembly 191 passes through the output port 1132 and communicates with the coil mounting base 182.

[0070] As an optional implementation method, Figure 10 , Figure 11 , Figure 12 and Figure 13 As shown in the first embodiment of this application, the stationary transmission assembly 193 is at least partially fixed to the motor housing. During the operation of the superconducting motor, the stationary transmission assembly 193 and the motor housing remain stationary. The stationary transmission assembly 193 includes a stationary input cylinder 1931, a stationary inner partition cylinder 1932, a stationary output cylinder 1933, and a stationary outer protective cylinder 1934. The stationary input cylinder 1931, the stationary inner partition cylinder 1932, the stationary output cylinder 1933, and the stationary outer protective cylinder 1934 are substantially coaxially arranged. The stationary inner partition cylinder 1932 is sleeved on the outside of the stationary input cylinder 1931, the stationary output cylinder 1933 is sleeved on the outside of the stationary inner partition cylinder 1932, and the stationary outer protective cylinder 1934 is sleeved on the outside of the stationary output cylinder 1933.

[0071] A stationary input channel 1935 is formed within the stationary input cylinder 1931, and a stationary output channel 1936 is formed between the stationary output cylinder 1933 and the stationary inner partition cylinder 1932. A stationary inner vacuum layer 1937 is formed between the stationary inner partition cylinder 1932 and the stationary input cylinder 1931, and a stationary outer vacuum layer 1938 is formed between the stationary outer protective cylinder 1934 and the stationary output cylinder 1933. The stationary inner vacuum layer 1937 can further isolate heat transfer between the stationary input channel 1935 and the stationary output channel 1936, preventing the second cooling medium in the stationary input channel 1935 from being heated by the second cooling medium in the stationary output channel 1936, thus improving the cooling efficiency of the second cooling medium during operation. The rotating outer vacuum layer 1918 can also isolate heat transfer between the stationary output channel 1936 and the outside air, preventing the second cooling medium in the stationary output channel 1936 from being heated by the outside air, so that the second cooling medium in the stationary output channel 1936 remains at a low temperature, further reducing the heat leakage of the second cooling medium in the stationary input channel 1935.

[0072] Several static support members 1939 are formed between the static output cylinder 1933 and the static inner partition cylinder 1932. A static output channel 1936 is formed between the static inner partition cylinder 1932 and the static output cylinder 1933. The connection between the static output cylinder 1933 and the static inner partition cylinder 1932 is relatively weak. The static support members 1939 that do not affect the output of the second cooling medium are set in the static output channel, which can enhance the structural strength of the static output channel 1936 and also enhance the overall mechanical strength of the static transmission assembly 193.

[0073] The cold medium transfer mechanism 19 includes a magnetic fluid sealing assembly 195, which is mounted to the outer surface of the rotating outer casing 1914 of the rotating transfer assembly 191 or the outer surface of the stationary outer casing 1934 of the stationary transfer assembly 193. The magnetic fluid sealing assembly 195 includes an assembly holder 1951, a magnet holder 1952, and an air extraction component 1953.

[0074] As a specific implementation method, such as Figure 10 and Figure 11As shown, the rotating transmission component 191 and the stationary transmission component 193 are connected by inserting the rotating transmission component 191 into the stationary transmission component 193. The rotating transmission component 191 is generally located inside the stationary transmission component 193. However, it should be understood that both the rotating transmission component 191 and the stationary transmission component 193 are multi-layered structures. Although the rotating transmission component 191 is generally located inside the stationary transmission component 193, some structures within the rotating transmission component 191 may still be located outside the middle portion of the stationary transmission component 193. In the stationary output channel 1936, the inner diameter of the stationary output cylinder 1933 is larger than the outer diameter of the rotating output cylinder 1913 and the rotating outer protective cylinder 1914. At least a portion of the stationary output channel 1936 is fitted over the outer side of the rotating output channel 1916.

[0075] The component mounting bracket 1951 and magnet mounting bracket 1952 are also substantially coaxially arranged with the stationary input cylinder 1931, the stationary inner partition cylinder 1932, the stationary output cylinder 1933, and the stationary outer protective cylinder 1934. At least a portion of the component mounting bracket 1951 is fitted onto the outside of the stationary outer protective cylinder 1934 and located at one end of the stationary transmission component 193. The component mounting bracket 1951 is also connected to the motor housing of the superconducting motor, thereby fixing and supporting the stationary output component. The magnet mounting bracket 1952 is fitted onto the outside of the stationary outer protective cylinder 1934 and is fixedly connected to one side of the component mounting bracket 1951. The magnet holder 1952 forms an inner fixing portion 1952a and an outer fixing portion 1952b. The inner fixing portion 1952a is located on the side closer to the rotary transmission assembly 191, and the outer fixing portion 1952b is located on the side farther away from the rotary transmission assembly 191. A corresponding magnet 1954 is provided in both the inner fixing portion 1952a and the outer fixing portion 1952b. At least a portion of the area between the inner fixing portion 1952a and the outer fixing portion 1952b forms an air extraction channel 1955.

[0076] After the rotating transmission assembly 191 is connected to the stationary transmission assembly 193, a first gap 196 is formed between the stationary output cylinder 1933 of the stationary transmission assembly 193 and the rotating outer protective cylinder 1914 of the rotating transmission assembly 191. The magnet holder 1952 is located substantially outside the first gap 196. The suction channel 1955 passes through the stationary outer protective cylinder 1934 and communicates with the first gap 196. The suction member 1953 is located in the suction channel 1955 and is fixed to the suction channel 1955, and communicates with the first gap 196. The first gap 196 is filled with magnetofluid, and the magnets 1954 provided in the inner fixing part 1952a and the outer fixing part 1952b of the magnet holder 1952 each attract the magnetofluid in their corresponding areas, thereby forming a magnetofluid seal in the first gap 196. The outer side of the first gap 196 connects to the stationary output channel 1936 and the rotating output channel 1916, and there is a problem of the second cooling medium seeping into the outer side of the first gap 196. The inner side of the first gap 196 connects to the outside air, and there is a problem of air seeping into the inner side of the first gap 196. The magnetic fluid in the first gap 196 can slow down the inflow of outside air from the inner side of the first gap 196, and can also slow down the inflow of the second medium in the stationary output channel 1936 and the rotating output channel 1916. The suction member 1953 is fixed to the suction channel 1955 between the inner fixing part 1952a and the outer fixing part 1952b, and the suction member 1953 is in communication with the first gap 196. On the one hand, the suction member 1953 can inject magnetic fluid into the first gap 196, thereby achieving magnetic fluid sealing; on the other hand, the suction member 1953 can evacuate the first gap 196 to make the first gap 196 close to a vacuum state. Meanwhile, the air extraction component 1953 can extract the second cooling medium and air that have seeped into the first gap 196 from the first gap 196, which can prevent the second cooling medium from entering the air and causing pollution, and also prevent the air from entering the stationary output channel 1936 or the rotating output channel 1916 and causing pollution to the second cooling medium.

[0077] The end of the stationary input cylinder 1931 includes an extension 1931a and a contraction 1931b. The extension 1931a is located outside the rotary input cylinder 1911, and at least a portion of the contraction 1931b is located inside the rotary input cylinder 1911. The diameter of the stationary input channel 1935 is smaller than the diameter of the rotary input channel 1915. The second cooling medium is input from the stationary input channel 1935 to the rotary input channel 1915. The diameter of the rotary input channel 1915 is set to be larger than the diameter of the stationary input channel 1935. The second cooling medium enters from the smaller diameter channel into the larger diameter channel, which reduces leakage of the second cooling medium from the gap between the rotary input channel 1915 and the stationary input channel 1935. The input interface is recessed within the rotary input channel 1915, which increases the pressure at the intersection of the stationary input channel 1935 and the rotary input channel 1915, increases the flow resistance of the second cooling medium in this area, and further reduces leakage.

[0078] The inner side of the extension 1931a is also provided with several annular portions 1931c distributed along the axial direction. The annular portions 1931c have a certain degree of elasticity and form elastic contact with the rotary input cylinder 1911. The several annular portions 1931c combine with each other to form a labyrinth sealing structure. Furthermore, the annular portions 1931c can be made of metal.

[0079] A support bearing 1923 is also provided between the extension 1931a and the rotary input cylinder 1911. The support bearing 1923 can support the rotary input cylinder 1911, prevent the rotary input cylinder 1911 from vibrating during rotation, ensure the operational stability between the rotary transmission component and the stationary transmission component, and ensure that each sealing structure is in a stable operating state.

[0080] As another specific implementation method, such as Figure 12 and Figure 13 As shown, the rotating transmission component 191 and the stationary transmission component 193 are basically connected by inserting the stationary transmission component 193 into the rotating transmission component 191. Overall, the stationary transmission component 193 is located inside the rotating transmission component 191. However, it should be understood that both the stationary transmission component 193 and the rotating transmission component 191 are multi-layered structures. Although the stationary transmission component 193 is generally located inside the rotating transmission component 191, some structures in the stationary transmission component 193 may still be located outside the middle part of the rotating transmission component 191.

[0081] The component mounting bracket 1951 and magnet mounting bracket 1952 are also basically coaxially arranged with the rotary input cylinder 1911, the rotary inner partition cylinder 1912, the rotary output cylinder 1913 and the rotary outer protective cylinder 1914.

[0082] A stationary input channel 1935 is formed within the stationary input cylinder 1931, and a stationary output channel 1936 is formed between the stationary output cylinder 1933 and the stationary inner partition cylinder 1932. The inner diameter of the rotating input cylinder 1911 is larger than the outer diameter of the stationary input cylinder 1931, and the inner diameter of the rotating output cylinder 1913 is larger than the outer diameter of the stationary output cylinder 1933. The rotating input channel 1915 is fitted outside the stationary input channel 1935, and the rotating output channel 1916 is also fitted outside the stationary output channel 1936.

[0083] At least a portion of the component holder 1951 is fitted onto the outside of the rotating outer casing 1914 and is positioned near one end of the outer side of the rotating transmission component 191. The magnet holder 1952 is fitted onto the outside of the rotating outer casing 1914 and is fixedly connected to the inside of the component holder 1951. The magnet holder 1952 forms an inner fixing portion 1952a and an outer fixing portion 1952b. The outer fixing portion 1952b is positioned near the component holder 1951, while the inner fixing portion 1952a is positioned away from the component holder 1951. A corresponding magnet 1954 is provided in both the inner fixing portion 1952a and the outer fixing portion 1952b. The stationary outer casing 1934 of the stationary transmission assembly 193 is provided with an axially perpendicular air extraction channel 1955. The air extraction channel 1955 is located on the side of the stationary outer casing 1934 near the assembly fixing frame 1951. The air extraction channel 1955 passes through the stationary outer casing 1934 and is connected to the vacuum layer between the stationary outer casing 1934 and the stationary outer partition.

[0084] After the rotating transmission assembly 191 is connected to the stationary transmission assembly 193, a second gap 197 is formed between the stationary outer casing 1934 of the stationary transmission assembly 193 and the rotating outer casing 1914 of the rotating transmission assembly 191. The magnet holder 1952 is located substantially outside the second gap 197. At least a portion of the stationary outer vacuum layer 1938 is connected to the second gap 197 through a connecting hole, and the evacuation channel 1955 is interconnected with the second gap 197. The evacuation member 1953 is located in the evacuation channel 1955 and is fixed to the evacuation channel 1955, and the evacuation member 1953 is interconnected with the second gap 197. The second gap 197 is filled with magnetofluid, and the magnets 1954 provided in the inner fixing portion 1952a and the outer fixing portion 1952b of the magnet holder 1952 each attract the magnetofluid in their corresponding areas, thereby forming a magnetofluid seal in the second gap 197. The inner side of the second gap 197 connects to the stationary output channel 1936 and the rotating output channel 1916, and there is a problem of leakage of the second cooling medium inside the second gap 197. The magnetic fluid inside the second gap 197 can slow down the inflow of the second cooling medium into the stationary output channel 1936 and the rotating output channel 1916. One side of the vacuum member 1953 can inject magnetic fluid into the first gap 196, thereby achieving magnetic fluid sealing. The other side of the vacuum member 1953 can evacuate the second gap 197 to bring the first gap 196 close to a vacuum state. At the same time, the vacuum member 1953 can extract the second cooling medium that has seeped into the second gap 197 from the second gap 197, which can prevent the second cooling medium from entering the air and causing contamination.

[0085] The end of the stationary input cylinder 1931 includes an extension 1931a and a contraction 1931b. The extension 1931a is located outside the rotary input cylinder 1911, and at least a portion of the contraction 1931b is located inside the rotary input cylinder 1911. The diameter of the stationary input channel 1935 is smaller than the diameter of the rotary input channel 1915. The second cooling medium is input from the stationary input channel 1935 to the rotary input channel 1915. The diameter of the rotary input channel 1915 is set to be larger than the diameter of the stationary input channel 1935. The second cooling medium enters from the smaller diameter channel into the larger diameter channel, which reduces leakage of the second cooling medium from the gap between the rotary input channel 1915 and the stationary input channel 1935. The input interface is recessed within the rotary input channel 1915, which increases the pressure at the intersection of the stationary input channel 1935 and the rotary input channel 1915, increases the flow resistance of the second cooling medium in this area, and further reduces leakage.

[0086] The inner side of the extension 1931a is also provided with several annular portions 1931c distributed along the axial direction. The annular portions 1931c have a certain degree of elasticity and form elastic contact with the rotary input cylinder 1911. The several annular portions 1931c combine with each other to form a labyrinth sealing structure. Furthermore, the annular portions 1931c can be made of metal.

[0087] A support bearing 1923 is also provided between the extension 1931a and the rotary input cylinder 1911. The support bearing 1923 can support the rotary input cylinder 1911, prevent the rotary input cylinder 1911 from vibrating during rotation, ensure the operational stability between the rotary transmission component and the stationary transmission component, and ensure that each sealing structure is in a stable operating state.

[0088] An annular groove 1931d is formed on the inner side of the extension 1931a. The stationary transmission assembly 193 also includes a supporting sealing ring 1941, which is installed into the annular groove 1931d. Several fixing protrusions are formed within the annular groove 1931d, and several fixing grooves corresponding to the fixing protrusions are formed on the outer side of the supporting sealing ring 1941. The fixing grooves and fixing protrusions cooperate to prevent the sealing ring from rotating within the annular groove 1931d. A ring of elastic sealing protrusions is formed on the inner side of the supporting sealing ring 1941, abutting against the outer side of the rotary input cylinder 1911. When the rotary transmission assembly 191 rotates, the rotary input cylinder 1911 and the sealing ring rotate relative to each other, allowing the sealing protrusions to tightly adhere to the outer side of the rotary input cylinder 1911, forming a sealing structure.

[0089] Finally, it should be noted that the above are only some preferred embodiments of this application and are not intended to limit this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A rotor, comprising: Rotor housing, which encloses and forms a receiving space; A rotor shaft, at least a portion of which is located within the receiving space; The rotor core is located within the accommodating space and outside the rotor shaft; A rotor winding, wherein the rotor winding is located within the receiving space and is mounted to the outer side of the rotor core; A cold medium transfer mechanism, at least a portion of which is mounted to the rotor shaft; Its features are: The cold medium transfer mechanism includes a rotary transfer component, a stationary transfer component, and a magnetohydrodynamic sealing component. The rotary transfer component is mounted to one end of the rotor shaft. The stationary transfer component is rotatably connected to the rotary transfer component. The stationary transfer component forms a stationary input channel and a stationary output channel located outside the stationary input channel. The rotary transfer component forms a rotary input channel and a rotary output channel located outside the rotary input channel. The magnetohydrodynamic sealing component is located outside the stationary output channel or outside the rotary output channel to seal the gap between the stationary output channel and the rotary output channel.

2. The rotor according to claim 1, characterized in that: The magnetohydrodynamic sealing assembly includes a magnet fixing part, a magnet, an air extraction channel, and an air extraction component. The magnet is installed on the magnet fixing part, the air extraction channel is formed on the outside of the stationary output channel, and the air extraction component is installed on the air extraction channel. The stationary output channel is sleeved on the outside of the rotary output channel, and the magnet fixing part is installed on the outside of the stationary transmission channel; or the rotary output channel is sleeved on the outside of the stationary output channel, and the magnetohydrodynamic sealing assembly is installed on the outside of the rotary transmission channel.

3. The rotor according to claim 2, characterized in that: The stationary output channel is sleeved on the outside of the rotating output channel, and a first gap is formed between the stationary output channel and the rotating output channel. The magnet fixing part includes an inner fixing part and an outer fixing part installed on the outside of the stationary output channel. The air extraction channel is formed between the inner fixing part and the outer fixing part, and the air extraction channel is connected to the first gap.

4. The rotor according to claim 2, characterized in that: The rotating output channel is sleeved on the outside of the stationary output channel, and a second gap is formed between the rotating output channel and the stationary output channel. The magnet fixing part includes an inner fixing part and an outer fixing part installed on the outside of the rotating output channel. The air extraction channel forms the outside of the stationary output channel and is connected to the second gap.

5. The rotor according to claim 3 or 4, characterized in that: The rotary transmission assembly includes a rotary input cylinder, within which the rotary input channel is formed; the stationary transmission assembly includes a stationary input cylinder, within which the stationary input channel is formed. The end of the stationary input cylinder includes an extension and a contraction. The extension is located on the outside of the rotating input cylinder, and at least a portion of the contraction is located on the inside of the rotating input cylinder.

6. The rotor according to claim 5, characterized in that: The rotary transmission assembly further includes a support bearing located between the rotary input cylinder and the extension; and / or The inner side of the extension of the stationary input cylinder is further formed with several elastic annular portions distributed along the axial direction.

7. The rotor according to claim 5, characterized in that: An annular groove is formed on the inner side of the extension of the stationary input cylinder. The stationary transmission assembly also includes a support sealing ring, which is installed in the annular groove. A plurality of fixed protrusions are formed in the annular groove, and a plurality of fixed grooves corresponding to the fixed protrusions are formed on the outer side of the support sealing ring.

8. The rotor according to claim 7, characterized in that: A sealing protrusion is formed on the inner side of the support sealing ring, and the sealing protrusion abuts against the outer side of the rotary input cylinder.

9. The rotor according to claim 1, characterized in that: The stationary transmission component further forms a stationary inner vacuum layer and a stationary outer vacuum layer, the stationary inner vacuum layer being located between the stationary input channel and the stationary output channel, and the stationary outer vacuum layer being located outside the stationary output channel; the rotating transmission component further forms a rotating inner vacuum layer and a rotating outer vacuum layer, the rotating inner vacuum layer being located between the rotating input channel and the rotating output channel, and the rotating outer vacuum layer being located outside the rotating output channel.

10. A superconducting motor, characterized in that: The superconducting motor includes a motor stator and a rotor as described in any one of claims 1 to 9.

Images