High-temperature superconducting rotor local hot spot eliminating device for circulating cold helium

Abstract

The invention provides a high-temperature superconducting rotor local hot spot eliminating device for circulating cold helium, and relates to the technical field of superconducting synchronous phase modifiers, the high-temperature superconducting rotor local hot spot eliminating device comprises a supporting sleeve, six sets of superconducting coil assemblies are uniformly installed in the circumferential direction of the supporting sleeve, and each set of superconducting coil assembly comprises a step core block fixedly connected to the surface of the supporting sleeve. Three double-layer superconducting wire plates are uniformly arranged on two sides of the stepped core block, and each double-layer superconducting wire plate is fixedly connected with a runway type superconducting coil. The annular guide rail driving mechanism drives the driving wheel to rotate and cooperates with the driven wheel to drive the transmission belt to rotate, that is, the transmission belt drives the movable cold guide plate to rotate along the runway type sliding rail and move to the local hot spot generation position to exchange heat with the movable cold guide plate. According to the invention, the purpose of cooling local hot spots is achieved, and the problems of local temperature rise and local quenching of the magnet are avoided.

Description

Technical Field

[0001] The invention relates to the technical field of superconducting synchronous condensers, and in particular to a device for eliminating local hot spots of a high-temperature superconducting rotor for circulating cold helium. Background Art

[0002] Synchronous condensers, also known as synchronous compensators, are actually a special form of synchronous motors. The internal structure of synchronous condensers is roughly similar to that of general synchronous motors. In contrast, the shaft of synchronous condensers is relatively thin and does not need to bear mechanical loads. The working principle of synchronous condensers is mainly to control reactive power by adjusting the excitation current. Specifically, when the device is in an under-excited state, the synchronous condenser will absorb reactive power from the power grid; on the contrary, in an over-excited state, the synchronous condenser will deliver reactive power to the power grid.

[0003] The operating mechanism of the superconducting synchronous condenser is similar to that of the traditional synchronous condenser in structure, both of which include key components such as stator, rotor, slip ring, cooling system and excitation system. The difference is that the superconducting synchronous condenser replaces the excitation coil in the motor rotor with a superconducting coil from a traditional copper coil, and optimizes the rotor structure.

[0004] During the operation of the superconducting synchronous condenser rotor components, it is impossible to achieve an ideal zero resistance. The superconducting magnet itself will produce eddy current losses and generate heat under AC conditions. Or due to incomplete insulation details, heat leakage and heat conduction will occur, which will cause the overall temperature of the rotor to rise. Therefore, a special cooling system is added to meet the low-temperature working requirements of the superconducting coil.

[0005] However, when the power grid encounters alternating loads, startup, and power grid flicker, that is, when encountering large disturbances with short-term irregular changes, if the reactive power is too much, it needs to be absorbed by the phase regulator; if the reactive power is insufficient, it needs to be compensated by the phase regulator; in the case of such large disturbances and alternating irregular disturbances, the rotor needs to respond quickly, and the short-term overload is very large, which will cause local temperature rise, or face the alternating load of the power grid, which will cause the appearance of local hot spots, and then local magnet quenching will occur.

[0006] The high-temperature superconducting coils in the rotor magnets of high-temperature phase-shifting cameras are prone to local hot spots due to AC loss and other conditions. Conventional heat dissipation methods cannot specifically accelerate the flow rate of cold helium gas and speed up heat dissipation. Each group of magnets in the existing six groups of three pairs of magnets is stacked with three layers of double-pancake racetrack-shaped coils. Considering the overlapping distribution of the superconducting coil parts, when local hot spots appear, it is difficult to quickly deal with the overlapping parts due to overlapping obstructions on the outside of the entire coil.

[0007] When a superconductor transmits alternating current or is in an alternating magnetic field or there is electromagnetic disturbance, a loss will be generated in the superconductor, namely, AC loss. From a macroscopic point of view, AC loss is caused by the induced electric field generated in the superconductor by the changing magnetic field when the superconductor is passed through an alternating current or is in a changing magnetic field. From a microscopic point of view, AC loss is believed to be caused by the viscous motion of quantized magnetic flux lines.

[0008] Therefore, there is an urgent need to develop a device that can eliminate local hot spots in high-temperature superconducting rotors. Summary of the invention

[0009] The high-temperature superconducting coils in the rotor magnets of high-temperature phase-shifting cameras are prone to local hot spots under AC loss and other conditions. Conventional heat dissipation methods cannot accelerate the flow rate of cold helium gas in a targeted manner and speed up heat dissipation. To solve the above technical problems, the present invention provides a local hot spot elimination device for high-temperature superconducting rotors that circulates cold helium gas. The annular guide rail drive mechanism drives the driving wheel to rotate, and cooperates with the driven wheel to drive the transmission belt to rotate, that is, the transmission belt drives the movable cold plate to rotate along the runway-type slide rail, moves to the position where the local hot spot is generated, and exchanges heat with the movable cold plate. The present invention achieves the purpose of cooling the local hot spots, avoiding the problem of local temperature rise and local quenching of the magnet.

[0010] In order to achieve the above object, the present invention adopts the following technical solution:

[0011] A device for eliminating local hot spots of a high-temperature superconducting rotor for circulating cold helium comprises a supporting sleeve, six groups of superconducting coil assemblies are evenly installed in the circumferential direction of the supporting sleeve; each group of superconducting coil assemblies comprises a stepped core block fixedly connected to the surface of the supporting sleeve, three double-layer superconducting wire sheets are evenly arranged on both sides of the stepped core block, a racetrack-type superconducting coil is fixedly connected to each double-layer superconducting wire sheet, and a main cooling plate for heat dissipation is movably connected to the lower surface of each double-layer superconducting wire sheet;

[0012] The upper surface of each double-layer superconducting wire sheet is movably connected with a cooling box, and a side of the cooling box abutting the double-layer superconducting wire sheet is fixedly connected with a plurality of temperature monitoring mechanisms for monitoring the location of local hot spots on the double-layer superconducting wire sheet, and the internal cavity of the cooling box is provided with a local hot spot treatment cooling mechanism;

[0013] The local hot spot processing cooling mechanism includes a runway-shaped slide rail fixedly connected to the top of the inner cavity of the cold conduction box, the interior of the cold conduction box is provided with a runway-shaped slide groove with the same shape as the racetrack-shaped superconducting coil arrangement on the double-layer superconducting wire sheet, a movable cold conduction plate is movably connected to the outer surface of the runway-shaped slide rail, the lower surface of the movable cold conduction plate is movably connected to the bottom of the inner cavity of the runway-shaped slide groove, and a driving component for driving the movable cold conduction plate to move along the runway-shaped slide rail is provided on the runway-shaped slide groove.

[0014] Furthermore, it includes a driving component, which includes an output end of a ring guide rail driving mechanism fixedly connected to the bottom wall of a runway-type slide, the output end is fixedly connected to a driving wheel, and a driven wheel is movably connected to the bottom wall of the runway-type slide, and a transmission belt is externally meshed and connected to the driving wheel and the driven wheel, and the outer surface of the transmission belt is fixedly connected to one side of the movable cold conduction plate.

[0015] Furthermore, the movable cooling plate slides along the racetrack-shaped slide rail for one circle, so that the coverage area formed on the racetrack-shaped slide groove is larger than the area of ​​the racetrack-shaped superconducting coil on the double-layer superconducting wire sheet.

[0016] Furthermore, the cross section of the runway-shaped slide rail is convex, and the interior of the runway-shaped slide rail is arranged as a cavity.

[0017] Furthermore, the two ends of the runway-shaped slide rail are respectively fixedly connected with a branch air inlet pipe and an air outlet pipe, and one end of the branch air inlet pipe and the air outlet pipe both extend to the outside of the cold conduction box.

[0018] Furthermore, the three branch air inlet pipes and the air outlet pipes located on the same side of the stepped core block are all divided and converged through the attached air pipe.

[0019] Furthermore, diversion cavities are provided inside both ends of the stepped core block, and the outer surfaces at both ends of the stepped core block are fixedly connected with main air pipes connected to the diversion cavities. Three connecting holes aligned with the main cooling plates are provided on the inner walls on both sides of the diversion cavity, and each connecting hole is connected to the interior of an adjacent cooling box.

[0020] Furthermore, a meandering air passage is provided inside the main cooling plate, and an outlet and an inlet of the meandering air passage are both communicated with the communicating holes provided at the same height position on the diversion cavity.

[0021] Furthermore, two edge limit blocks are fixedly connected to the support sleeve, and the two edge limit blocks cover the double-layer superconducting wire plate, the main cooling plate, and the cooling box.

[0022] Furthermore, a solenoid valve is fixedly installed on each branch air intake pipe.

[0023] Beneficial effects:

[0024] 1. The annular guide rail driving mechanism of the present invention drives the driving wheel to rotate, and cooperates with the driven wheel to drive the transmission belt to rotate, that is, the transmission belt drives the movable cold conduction plate to rotate along the runway-type slide rail, moves to the position where the local hot spot is generated, and exchanges heat with the movable cold conduction plate to achieve the purpose of cooling the local hot spot, avoiding local temperature rise and the problem of local quenching of the magnet.

[0025] 2. When the movable cooling plate moves along the runway-shaped slide rail to the position where the local hot spot appears, the present invention can allow cold helium gas to enter the runway-shaped slide rail through the branch air inlet pipe, and heat exchange is performed with the movable cooling plate through the flow of cold helium gas, thereby accelerating the heat exchange efficiency between the movable cooling plate and the local hot spot, and the cold helium gas after the heat exchange flows out through the air outlet pipe.

[0026] 3. The three branch air inlet pipes of the present invention extend to one end outside the cold conduction box and are connected through an attached air pipe. The cold helium introduced through the attached air pipe is divided into three branch air inlet pipes and enters the interior of the cold conduction box. The three air outlet pipes extend to one end outside the cold conduction box and are also connected through an attached air pipe, that is, the other end is guided out through the attached air pipe. The cold helium after heat exchange is gathered and guided out. After cooling, it can be reused, thereby avoiding the waste of helium resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of a device for eliminating local hot spots of a high-temperature superconducting rotor using circulating cold helium gas according to the present invention;

[0028] Figure 2 It is a schematic diagram of the arrangement of the structures on both sides of the stepped core block of the present invention;

[0029] Figure 3 It is a structural schematic diagram of the local hot spot treatment cooling mechanism of the present invention;

[0030] Figure 4 It is a schematic diagram of the cross-sectional structure of the movable cooling plate and the racetrack-shaped slide rail cross section of the present invention;

[0031] Figure 5 It is a schematic diagram of the connection structure between the cooling plate and the racetrack-type slide rail of the present invention;

[0032] Figure 6 It is a schematic diagram of the structure of a double-layer superconducting wire board of the present invention;

[0033] Figure 7 It is a schematic diagram of the structure of the diversion cavity and the communicating hole of the present invention;

[0034] Figure 8 This is a schematic diagram of the internal structure of the main cold plate of the present invention;

[0035] Fig. 9 For the present invention Figure 3 Schematic diagram of the enlarged structure at point A in the middle.

[0036] Among them, the figure markings are: 1. support sleeve; 2. stepped core block; 3. double-layer superconducting wire board; 4. edge limit block; 5. main cooling plate; 6. cooling box; 7. main air pipe; 8. auxiliary air pipe; 9. diversion cavity; 10. connecting hole; 11. round air duct; 12. runway-type slide groove; 13. movable cooling plate; 14. runway-type slide rail; 15. annular guide rail drive mechanism; 16. transmission belt; 17. air outlet pipe; 18. branch air inlet pipe. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0038] like Figure 1 , Figure 2 As shown, a local hot spot elimination device for a high-temperature superconducting rotor circulating cold helium of the present invention comprises a support sleeve 1, and six groups of superconducting coil assemblies are evenly installed on the circumference of the support sleeve 1. According to the prior art, the support sleeve 1 and the six groups of superconducting coil assemblies are fixedly connected to the inside of the dewar shell to form the rotor structure of the superconducting synchronous condenser, and the inside of the dewar shell is in a vacuum state. The rotor structure composed of the dewar shell and its internal structure is embedded in the stator structure, and moves to cut the magnetic flux lines to generate induced current to absorb or compensate reactive power.

[0039] Each group of superconducting coil assemblies includes a stepped core block 2 fixedly connected to the surface of a supporting sleeve 1, three double-layer superconducting wire sheets 3 are evenly arranged on both sides of the stepped core block 2, a racetrack-type superconducting coil is fixedly connected to each double-layer superconducting wire sheet 3, and a main cooling plate 5 for conventional heat dissipation treatment is movably connected to the lower surface of each double-layer superconducting wire sheet 3. The heat generated during the conventional operation of the double-layer superconducting wire sheet 3 is processed by the main cooling plate 5 to avoid the problem of untimely heat dissipation and ensure that the normal operation of the double-layer superconducting wire sheet 3 is not affected.

[0040] The upper surface of each double-layer superconducting wire sheet 3 is movably connected to a cooling box 6, and a side of the cooling box 6 that abuts the double-layer superconducting wire sheet 3 is fixedly connected to multiple temperature monitoring mechanisms for monitoring the location of local hot spots on the double-layer superconducting wire sheet 3, and the internal cavity of the cooling box 6 is provided with a local hot spot processing cooling mechanism.

[0041] The temperature monitoring mechanism is an existing technology, which is used to monitor the temperature of each area on the double-layer superconducting wire sheet 3 in real time. The interior of the cold conduction box 6 is also equipped with a main control mechanism, a signal transmission mechanism, etc. according to the existing technology. Through the cooperation of the above structures, when the temperature monitoring mechanism detects that a local hot spot is generated somewhere on the double-layer superconducting wire sheet 3, the position information of the local hot spot is transmitted to the main control mechanism, and then the local hot spot processing cooling mechanism is moved to the corresponding local hot spot generation position through the main control mechanism, and the local hot spot is cooled to avoid local temperature rise and local quenching of the magnet.

[0042] like Figure 3 As shown, the local hot spot treatment cooling mechanism includes a racetrack-shaped slide rail 14 fixedly connected to the top of the inner cavity of the cold conduction box 6, and the interior of the cold conduction box 6 is provided with a racetrack-shaped slide groove 12 with the same shape as the racetrack-shaped superconducting coil arrangement on the double-layer superconducting wire board 3, and a movable cold conduction plate 13 is movably connected to the outer surface of the racetrack-shaped slide rail 14, and the lower surface of the movable cold conduction plate 13 is movably connected to the bottom of the inner cavity of the runway-shaped slide groove 12, and a driving component for driving the movable cold conduction plate 13 to move along the racetrack-shaped slide rail 14 is provided on the runway-shaped slide groove 12. Through the action of the driving component, the movable cold conduction plate 13 can be driven to move along the racetrack-shaped slide rail 14 to the position where the local hot spot appears, and heat exchange is performed with the movable cold conduction plate 13, so as to achieve the purpose of cooling the local hot spot.

[0043] like Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown, the driving assembly includes an annular guide rail driving mechanism 15 fixedly connected to the bottom wall of the runway-type slide 12, the output end of the annular guide rail driving mechanism 15 is fixedly connected to a driving wheel, the bottom wall of the runway-type slide 12 is movably connected to a driven wheel, the driving wheel and the driven wheel are externally meshed and connected with a transmission belt 16, the outer surface of the transmission belt 16 is fixedly connected to one side of the movable cold conduction plate 13, the annular guide rail driving mechanism 15 drives the driving wheel to rotate, and the driven wheel drives the transmission belt 16 to rotate, that is, the transmission belt 16 drives the movable cold conduction plate 13 to rotate along the runway-type slide 14 and move to the position where the local hot spot is generated. The driving assembly also includes other structures in the prior art that can drive the movable cold conduction plate 13 to rotate along the runway-type slide 14, which are not listed one by one in the present invention.

[0044] The movable cooling plate 13 slides along the racetrack-shaped slide rail 14 in one circle, and the coverage area on the racetrack-shaped slide groove 12 is larger than the area of ​​the racetrack-shaped superconducting coil on the double-layer superconducting wire sheet 3, thereby avoiding the occurrence of heat exchange treatment dead corners and ensuring that heat exchange treatment can be performed on local hot spots at any position on the double-layer superconducting wire sheet 3.

[0045] Furthermore, the cross-section of the runway-shaped slide rail 14 is convex, and the interior of the runway-shaped slide rail 14 is provided with a cavity. The two ends of the runway-shaped slide rail 14 are respectively fixedly connected with a branch air inlet pipe 18 and an air outlet pipe 17. One end of the branch air inlet pipe 18 and the air outlet pipe 17 extend to the outside of the cold conduction box 6. When the movable cold conduction plate 13 moves along the runway-shaped slide rail 14 to the position where the local hot spot appears, cold helium gas can be introduced into the runway-shaped slide rail 14 through the branch air inlet pipe 18. Heat exchange is performed with the movable cold conduction plate 13 through the flow of cold helium gas, thereby accelerating the heat exchange efficiency between the movable cold conduction plate 13 and the local hot spot. The cold helium gas after the heat exchange flows out through the air outlet pipe 17.

[0046] Furthermore, the three branch air inlet pipes 18 and the air outlet pipes 17 located on the same side of the stepped core block 2 are all diverted and converged through the auxiliary air pipe 8. The three branch air inlet pipes 18 extend to one end of the outside of the cold conduction box 6 and are connected through the auxiliary air pipe 8. The cold helium introduced through the auxiliary air pipe 8 is diverted to the three branch air inlet pipes 18 and enters the interior of the cold conduction box 6. The three outlet pipes 17 extend to one end of the outside of the cold conduction box 6 and are also connected through the auxiliary air pipe 8, that is, the other end is guided out through the auxiliary air pipe 8 to guide the cold helium after heat exchange and converge and guide it out. After cooling, it can be reused, thereby avoiding energy waste.

[0047] Further, such as Figure 7 As shown, a shunt cavity 9 is provided inside both ends of the stepped core block 2, and main gas pipes 7 communicating with the shunt cavity 9 are fixedly connected to the outer surfaces of both ends of the stepped core block 2. Three connecting holes 10 aligned with the main cooling plate 5 are provided on the inner walls on both sides of the shunt cavity 9, and each connecting hole 10 is connected to the interior of the adjacent cooling box 6. Cold helium gas is introduced into the shunt cavity 9 through the main gas pipe 7, and is shunted to the corresponding main cooling plate 5 through the multiple connecting holes 10 provided on both sides of the shunt cavity 9, so as to timely process the heat generated during the working process of the double-layer superconducting wire board 3.

[0048] Further, such as Figure 8 As shown, a meandering air passage 11 is provided inside the main cooling plate 5, and both the outlet and the inlet of the meandering air passage 11 are connected to the connecting hole 10 provided at the same height position on the diversion cavity 9. The meandering arrangement of the meandering air passage 11 prolongs the flow distance of the cold helium gas in the main cooling plate 5, so that a more efficient heat exchange treatment can be performed on the contacting double-layer superconducting wire sheet 3.

[0049] Furthermore, two edge limit blocks 4 are fixedly connected to the support sleeve 1, and the two edge limit blocks 4 cover the double-layer superconducting wire sheet 3, the main cooling plate 5, and the cooling box 6, thereby protecting the double-layer superconducting wire sheet 3, the main cooling plate 5, and the cooling box 6 to prevent the components from falling off when the rotor rotates as a whole.

[0050] Further, such as Fig. 9As shown, a solenoid valve is fixedly installed on each branch air inlet pipe 18, and six double-layer superconducting wire sheets 3 are arranged on both sides of the stepped core block 2. The solenoid valve is used to control whether the cold helium gas is introduced into the cooling box 6 adjacent to each double-layer superconducting wire sheet 3, and the solenoid valve is electrically connected to the main control mechanism.

[0051] The working principle of the present invention is:

[0052] like Figure 1-Figure 9 As shown, when no local hot spots appear on the double-layer superconducting wire board 3, the cold helium gas can be introduced into the shunt cavity 9 through the main gas pipe 7, and shunted to the corresponding main cold plate 5 through the multiple connecting holes 10 opened on both sides of the shunt cavity 9, so as to timely process the heat generated during the working process of the double-layer superconducting wire board 3, and ensure that the normal operation of the double-layer superconducting wire board 3 is not affected;

[0053] When the temperature monitoring mechanism installed at the bottom of the cold conduction box 6 detects the occurrence of a local hot spot, the driving component can drive the movable cold conduction plate 13 to move along the runway-shaped slide rail 14 to the position where the local hot spot occurs, and then introduce cold helium gas through the branch air inlet pipe 18 and flow into the runway-shaped slide rail 14. When the movable cold conduction plate 13 exchanges heat with the local hot spot, the cold helium gas flowing in the runway-shaped slide rail 14 will exchange heat with the movable cold conduction plate 13, and the cold helium gas after the heat exchange will flow out through the air outlet pipe 17, thereby accelerating the heat exchange between the movable cold conduction plate 13 and the local hot spot.

Claims

1. A device for eliminating local hot spots of a high-temperature superconducting rotor by circulating cold helium, characterized in that: It includes a support sleeve, and six groups of superconducting coil assemblies are evenly installed on the circumference of the support sleeve; each group of superconducting coil assemblies includes a stepped core block fixedly connected to the surface of the support sleeve, and three double-layer superconducting wire sheets are evenly arranged on both sides of the stepped core block, each double-layer superconducting wire sheet is fixedly connected to a racetrack-type superconducting coil, and the lower surface of each double-layer superconducting wire sheet is movably connected to a main cooling plate for heat dissipation; The upper surface of each double-layer superconducting wire sheet is movably connected with a cooling box, and a side of the cooling box abutting the double-layer superconducting wire sheet is fixedly connected with a plurality of temperature monitoring mechanisms for monitoring the location of local hot spots on the double-layer superconducting wire sheet, and the internal cavity of the cooling box is provided with a local hot spot treatment cooling mechanism; The local hot spot processing cooling mechanism includes a racetrack-shaped slide rail fixedly connected to the top of the inner cavity of the cold conduction box, the interior of the cold conduction box is provided with a racetrack-shaped slide groove with the same arrangement shape as the racetrack-shaped superconducting coils on the double-layer superconducting wire sheet, a movable cold conduction plate is movably connected to the outer surface of the racetrack-shaped slide rail, the lower surface of the movable cold conduction plate is movably connected to the bottom of the inner cavity of the runway-shaped slide groove, and a driving component for driving the movable cold conduction plate to move along the runway-shaped slide rail is provided on the runway-shaped slide groove.

2. The device for eliminating local hot spots of a high-temperature superconducting rotor using circulating cold helium according to claim 1, characterized in that: The driving assembly includes an output end of an annular guide rail driving mechanism fixedly connected to the bottom wall of a runway-shaped slide, the output end is fixedly connected to a driving wheel, a driven wheel is movably connected to the bottom wall of the runway-shaped slide, the driving wheel and the driven wheel are externally meshed and connected to a transmission belt, and the outer surface of the transmission belt is fixedly connected to one side of a movable cold conduction plate.

3. The device for eliminating local hot spots of a high-temperature superconducting rotor using circulating cold helium according to claim 1, characterized in that: After the movable cooling plate slides one circle along the racetrack-shaped slide rail, the coverage area formed on the racetrack-shaped slide groove is larger than the area of ​​the racetrack-shaped superconducting coil on the double-layer superconducting wire board.

4. The device for eliminating local hot spots of a high-temperature superconducting rotor using circulating cold helium according to claim 1, characterized in that: The cross section of the runway-shaped slide rail is convex, and the interior of the runway-shaped slide rail is a cavity.

5. The device for eliminating local hot spots of a high-temperature superconducting rotor using circulating cold helium according to claim 1, characterized in that: The two ends of the runway-shaped slide rail are respectively fixedly connected with a branch air inlet pipe and an air outlet pipe, and one end of the branch air inlet pipe and the air outlet pipe both extend to the outside of the cold conduction box.

6. The device for eliminating local hot spots of a high-temperature superconducting rotor using circulating cold helium according to claim 5, characterized in that: The three branch air inlet pipes and the air outlet pipes located on the same side of the stepped core block are all divided or converged through the attached air pipe.

7. The device for eliminating local hot spots of a high-temperature superconducting rotor using circulating cold helium according to claim 1, characterized in that: A diversion cavity is provided inside both ends of the stepped core block, and the outer surfaces of both ends of the stepped core block are fixedly connected with a main air pipe connected to the diversion cavity. Three connecting holes aligned with the main cooling plate are respectively provided on the inner walls on both sides of the diversion cavity, and each connecting hole is connected to the interior of an adjacent cooling box.

8. The device for eliminating local hot spots of a high-temperature superconducting rotor using circulating cold helium according to claim 7, characterized in that: A meandering air passage is provided inside the main cooling plate, and both the outlet and the inlet of the meandering air passage are communicated with the communicating holes provided at the same height position on the diversion cavity.

9. The device for eliminating local hot spots of a high-temperature superconducting rotor using circulating cold helium according to claim 1, characterized in that: The support sleeve is fixedly connected with two edge limit blocks, and the two edge limit blocks cover the double-layer superconducting wire plate, the main cooling plate and the cooling box.

10. The device for eliminating local hot spots of a high-temperature superconducting rotor using circulating cold helium according to claim 5, characterized in that: A solenoid valve is fixedly installed on each branch air intake pipe.

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