WO2023087408A1 - Magnetic levitation transportation train, and in-vehicle superconducting magnet system of magnetic levitation transportation - Google Patents

Abstract

An in-vehicle superconducting magnet system of magnetic levitation transportation, and a magnetic levitation transportation train. The in-vehicle superconducting magnet system comprises a cryostat (1) having a vacuum working chamber, wherein a superconducting coil (4, 42, 431, 432) and a low-temperature cold storage structure (3, 32, 33) are provided in the cryostat. A refrigerating device (2) operates, a cooling capacity is transferred by means of a cold conduction structure (5), and the superconducting coil (4, 42, 431, 432) and the low-temperature cold storage structure (3, 32, 33) are cooled, wherein the cold conduction structure (5) can bidirectionally transfer the cooling capacity; after the refrigerating device (2) stops operating, heat during the operation of the superconducting coil (4, 42, 431, 432) is transferred to the low-temperature cold storage structure (3, 32, 33) by means of the cold conduction structure (5); and the operation of refrigeration is continued until the cooling capacity cannot satisfy the operation of the superconducting coil (4, 42, 431, 432). By means of the cold conduction structure (5) and the cryostat (1) having the vacuum working chamber, the superconducting coil (4, 42, 431, 432) and the low-temperature cold storage structure (3, 32, 33) are independent arranged, thereby realizing dry and wet separation of a cold storage medium, such that electrical leads of the superconducting coil (4, 42, 431, 432) pass through the cryostat (1) without independent sealing, thus reducing the complexity of a system and improving the reliability of a low-temperature service process.

Description

Magnetic levitation traffic train and on-board superconducting magnet system for maglev traffic

This application claims the priority of the above-mentioned Chinese patent application submitted to the China Patent Office on November 19, 2021, with the application number 202111397808.4, and the title of the invention is "Maglev Transportation Train and Vehicle-mounted Superconducting Magnet System for Maglev Transportation", the entire content of which is incorporated by reference Incorporated in the above application.

technical field

The invention relates to the technical field of maglev transportation, in particular to a maglev transportation train and a vehicle-mounted superconducting magnet system for the maglev transportation.

Background technique

The magnet system includes cryostat, superconducting coils, temperature control system, vacuum system. The superconducting coils are installed inside the cryostat.

The technology of superconducting magnets soaked in low-temperature liquid for coils started earlier, and the current technology maturity is relatively high, the temperature distribution of the magnets is even, and the cooling design is simple. The low-temperature liquid-immersed superconducting magnet technology is mainly used in large-scale physical experiments, medical treatment and other fields. The magnets are immersed in low-temperature liquids. The magnets have a large shape and volume, and require large-scale gas storage and zero-evaporation refrigeration systems. Generally, it cannot work when the refrigerator is powered off, otherwise part of the low-temperature liquid will be vaporized, and will be lost to the air when the pressure of the inner container is too high.

The superconducting magnet system directly cooled by the refrigerator is a new technology that has developed rapidly in recent years. With the continuous improvement of the refrigerator capacity, this technical route has become a reality. The superconducting magnet system has no cryogenic fluid cooling, and has a compact structure and a small size. , light weight, convenient operation and low operating cost; but the temperature distribution of the magnet is greatly affected by the cooling structure, and it cannot work under the condition that the refrigerator is powered off.

Traditional magnet systems mostly use low-temperature liquid immersion methods such as liquid nitrogen and liquid helium, or direct cooling mode of refrigerators. Their structures are complex and they cannot maintain low temperatures for a long time without sufficient external protection. Therefore, it cannot meet the requirements of vehicle operation, especially under the condition that the vehicle has no external current receiving power supply, it is still necessary to ensure the low temperature working requirements of the superconducting magnet coil, which puts forward higher requirements for the magnet system.

Here, it should be noted that the technical content provided in this section is intended to help those skilled in the art understand the present invention, and does not necessarily constitute prior art.

Contents of the invention

In view of this, the object of the present invention is to provide a vehicle-mounted superconducting magnet system for maglev traffic, to reduce the difficulty of arranging the superconducting coils for maglev traffic; the present invention also provides a maglev traffic train.

In order to achieve the above object, the present invention provides the following technical solutions:

A vehicle-mounted superconducting magnet system for maglev transportation, including a cryostat with a vacuum working chamber, a refrigeration device for cooling the cryostat, and a low-temperature cold storage structure for storing cold energy in the cryostat , and superconducting coils;

The cryostat is also provided with a cooling conduction structure connecting the refrigeration device, the low-temperature cold storage structure and the superconducting coil, and the cooling conduction structure is a bidirectional cooling conduction structure for bidirectionally transferring cold energy.

Preferably, in the vehicle-mounted superconducting magnet system for maglev transportation, the superconducting coil is arranged in the middle of the cryostat, and the low-temperature cold storage structure is a surrounding type surrounding the superconducting coil. Low temperature cold storage structure.

Preferably, in the vehicle-mounted superconducting magnet system for maglev transportation, the superconducting coil and the low-temperature cold storage structure are arranged in parallel in the cryostat, and the cold-conducting structure is arranged between the superconducting coil and the cold storage structure. Between the low-temperature cold storage structures.

Preferably, in the vehicle-mounted superconducting magnet system for maglev transportation, the superconducting coils include a first superconducting coil and a second superconducting coil arranged in parallel in the cryostat, and the cryogenic cold storage structure is laid On the same radial side of the first superconducting coil and the second superconducting coil.

Preferably, in the above-mentioned vehicle-mounted superconducting magnet system for maglev transportation, electrical leads connecting the superconducting coil to external electrical equipment are arranged in the cryostat,

The through-chamber connectors of the electrical lead wires and the refrigerator cold head of the refrigeration device are both arranged on the top of the cryostat.

Preferably, in the vehicle-mounted superconducting magnet system of the above-mentioned maglev transportation, the electrical leads are connected to a Hall sensor and a temperature sensor, and the air pressure sensor and the temperature sensor are located on the superconducting coil;

The exterior of the cryostat is also provided with an excitation power supply connected to the Hall sensor and a temperature controller of the refrigeration device connected to the temperature sensor.

Preferably, in the above-mentioned vehicle-mounted superconducting magnet system for maglev transportation, a vacuum system for reducing the air pressure of the cryostat is also included, and the superconducting coil is arranged with temperature sensor;

The vacuum system also includes a molecular pump group arranged outside the cryostat.

A maglev transportation train, comprising a cryostat for cooling a superconducting coil, the vehicle-mounted superconducting magnet system for maglev transportation as described in any one of the above is arranged between the superconducting coil and the cryostat.

The vehicle-mounted superconducting magnet system for maglev transportation provided by the present invention includes a cryostat with a vacuum working chamber, a refrigeration device for cooling the cryostat, and a low-temperature cold storage structure for storing cold energy is arranged in the cryostat, and Superconducting coils; the cryostat is also equipped with a cooling structure connecting the refrigeration device, the low-temperature cold storage structure and the superconducting coil, and the cooling structure is a bidirectional cooling structure that transfers cold energy in two directions. The cryostat provides a vacuum environment, in which a superconducting coil and a low-temperature cold storage structure are installed. The refrigeration device works, and the cold energy is transferred through the cold-conducting structure to cool down the superconducting coil and the low-temperature cold-storage structure. The cold-conducting structure can The cooling capacity is transmitted in two directions. After the refrigeration device stops, the heat in the superconducting coil is transferred to the low-temperature cold storage structure through the cooling structure, and the cooling operation continues until the cooling capacity cannot meet the operation of the superconducting coil. Using the cold conduction structure and the cryostat in the vacuum working chamber, the superconducting coil and the cryogenic cold storage structure are arranged independently to realize the separation of dry and wet storage medium, and the electrical leads of the superconducting coil pass through the cryostat without independent sealing, reducing the system complexity, and improve the reliability of the low temperature service process.

Description of drawings

Through the following description of the embodiments of the present invention with reference to the accompanying drawings, the above and other objects, features and advantages of the present invention will be more clear, in the accompanying drawings:

Fig. 1 is the first layout schematic diagram of the vehicle-mounted superconducting magnet system of maglev transportation provided by the present invention;

Fig. 2 is the second layout schematic diagram of the vehicle-mounted superconducting magnet system of maglev transportation provided by the present invention;

Fig. 3 is a schematic diagram of the third arrangement of the vehicle-mounted superconducting magnet system of the maglev transportation provided by the present invention.

Detailed ways

The present invention is described below based on examples, but the present invention is not limited to these examples.

As shown in Figures 1-3, Figure 1 is a schematic diagram of the first layout of the vehicle-mounted superconducting magnet system for maglev transportation provided by the present invention; Figure 2 is a second layout of the vehicle-mounted superconducting magnet system for maglev transportation provided by the present invention Schematic diagram of the structure; FIG. 3 is a schematic diagram of the third arrangement of the vehicle-mounted superconducting magnet system for maglev transportation provided by the present invention.

This implementation provides a vehicle-mounted superconducting magnet system for maglev transportation, including a cryostat 1 with a vacuum working chamber, a refrigeration device 2 for cooling the cryostat 1, and a cryostat 1 is provided with a cold storage device. The low-temperature cold storage structure 3 and the superconducting coil 4; the cryostat 1 is also provided with a cold-conducting structure 5 connecting the refrigeration device 2, the low-temperature cold-storage structure 3 and the superconducting coil 4, and the cold-conducting structure 5 is for two-way cooling. Passed two-way conduction cooling structure. The cryostat 1 provides a vacuum environment, in which a superconducting coil 4 and a low-temperature cold storage structure 3 are arranged, and the refrigeration device 2 works, and the cold energy is transferred through the cold-conducting structure 5, and the superconducting coil 4 and the low-temperature cold storage structure 3 are Cooling, the cooling structure 5 can carry out two-way transmission of cooling capacity, after the refrigeration device 2 stops, through the cooling structure 5, the heat in the superconducting coil 4 is transferred to the low-temperature cold storage structure 1, until the cooling capacity can not meet the superconducting temperature. After the lead coil works, the refrigeration work is continued. Using the cooling structure 5 and the cryostat 1 of the vacuum working chamber, the superconducting coil 4 and the low-temperature cold storage structure 3 are arranged independently, and the cooling structure 5 is used for heat transfer, and the superconducting coil 4 does not need to be immersed in the liquid cooling environment. The dry-wet separation of the cold storage medium and the superconducting coil 4 is realized, and the electrical leads of the superconducting coil 4 pass through the cryostat 1 without independent sealing, which reduces the complexity of the system and improves the reliability of the low-temperature service process.

In a specific embodiment of the present case, the superconducting coil 4 is arranged in the middle of the cryostat 1 , and the low-temperature cold storage structure 3 is a surrounding low-temperature cold storage structure arranged around the superconducting coil 4 .

In a specific embodiment of this case, the superconducting coil 42 and the low-temperature cold storage structure 32 are arranged in parallel in the cryostat 1 , and the cold-conducting structure 5 is arranged between the superconducting coil 42 and the low-temperature cold storage structure 32 .

In a specific embodiment of the present case, the superconducting coils include a first superconducting coil 431 and a second superconducting coil 432 arranged in parallel in the cryostat 1, and the cryogenic cold storage structure 33 is laid on the first superconducting coil 431 and the second superconducting coil 432. The two superconducting coils 432 are on the same radial side.

The location of the superconducting coil in the cryostat 1 needs to be designed differently according to the different positions of the coil in the working process. This case provides three coil layout schemes, as shown in Figure 1, the superconducting coil 4 The arrangement directions are all radial directions in the plane. The top of the cryostat 1 is used as the installation point of the electrical leads and the cold head 21 of the refrigerator, and the top of the superconducting coil 4 is no longer arranged with a low-temperature cold storage structure, forming an avoidance with the electrical leads and the cold conduction structure 5 .

The low-temperature cold storage structure 3 including the first type is a surrounding structure. Under this structure, the superconducting coil 4 is located in the basic middle of the cryostat 1, and the low-temperature cold storage structure 3 is a surrounding low-temperature storage structure surrounding the superconducting coil 4. As for the cold structure, as shown in FIG. 1 , the low-temperature cold storage structure is U-shaped and surrounds the superconducting coil 4 in the circumferential direction. The cold conduction structure 5 includes a vertical part connected to the cold head 21 of the refrigerator, and a horizontal part connected horizontally to the low-temperature cold storage structure 3. During heat transfer, the surrounding low-temperature cold storage structure transfers heat from the two ends of the horizontal direction to the middle part. , to achieve effective cooling of the superconducting coil.

As shown in Figure 2, further, the superconducting coil 42 and the low-temperature cold storage structure 32 are arranged in parallel, the superconducting coil 42 and the low-temperature cold storage structure 32 are respectively located at the two ends of the cryostat 1 in the front and rear direction, and the cold-conducting structure 5 consists of a vertical The cold head 21 of the refrigerator is connected to the part, and the two ends of the transverse part are connected to the superconducting coil 42 and the low-temperature cold storage structure 32 respectively. On one side, the superconducting coil 42 is cooled.

As shown in FIG. 3 , further, a double-coil superconducting coil arrangement structure is provided, and the two superconducting coils are arranged in parallel along the front and rear directions of the cryostat 1 , and the low-temperature cold storage structure 33 is located at the bottom of the cryostat 1 At the bottom, the cold conduction structure 5 is connected to the cold head 21 of the refrigerator by the vertical part, and the horizontal part is respectively connected to the radial inner side of the first superconducting coil 431 and the second superconducting coil 432, and the low-temperature cold storage structure 33 cools the superconducting coil , output cooling capacity for the first superconducting coil 431 and the second superconducting coil 432 at the same time.

In a specific embodiment of the present case, the cryostat 1 is arranged with electrical leads connecting the superconducting coil 4 to external electrical equipment, the through-chamber connector 6 of the electrical leads, and the refrigerator cold head 21 of the refrigeration device 2, all arranged on top of cryostat 1. Due to the vacuum cavity structure of the cryostat 1, when the electrical leads are connected to the superconducting coil 4 and external electrical equipment, the part located in the cryostat 1 does not need to be sealed under immersion conditions. The locations where the leads pass through the cryostat 1 are effectively sealed and connected. At the same time, the electrical lead wires and the cold head 21 of the refrigerator entering the cryostat 1 are arranged at the top of the cryostat 1, which facilitates the location and processing of the installation structure and reduces the complexity of the structure arrangement.

In a specific embodiment of this case, the Hall sensor, temperature sensor, air pressure sensor and temperature sensor (as shown in the figure, sensor 61 that is used for indicating different sensors and superconducting coil 4 positional relationship that electric lead wire connects, not as its The limitation of the connection mode) is located on the superconducting coil 4; the outside of the cryostat 1 is also provided with an excitation power supply 7 connected to a Hall sensor, and a temperature controller 22 connected to a refrigeration device 2 of a temperature sensor.

Specifically, it also includes a vacuum system for reducing the air pressure of the cryostat 1, and a temperature sensor connected to the vacuum system by electrical leads is arranged on the superconducting coil; the vacuum system also includes a molecular pump group arranged outside the cryostat 1 8.

The cryostat 1 controls the temperature inside it through the temperature control system. The refrigeration device 2 is specifically a refrigerator. During its working process, the internal cooling capacity is provided by the cold head 21 of the refrigerator. The temperature sensor is located on the ultra-cooling coil 4. The temperature in the cryostat 1 is monitored, and a control signal is sent out, and the temperature controller 22 and the refrigerator 2 cooperate to control the work. The refrigerating machine 2 is also connected to a heating power supply 23 for power supply of the refrigerating machine 2 .

The Hall sensor and the voltage sensor are located on the back of the superconducting coil 4 to control the operation of the superconducting coil 4. The Hall sensor sends an electromagnetic signal to control the operation of the excitation power supply 7, so that the superconducting coil 4 performs electromagnetic induction. At the same time, in order to reduce the internal pressure of the cryostat, the pressure is controlled by the vacuum system. The air pressure sensor is located inside the cryostat 1, which is connected to the air pressure controller 81 to control the work of the molecular pump group 8 to ensure that it is located at the working pressure. Down.

Based on the vehicle-mounted superconducting magnet system for maglev traffic provided in the above-mentioned embodiments, the present invention also provides a maglev traffic train, including a cryostat for cooling the superconducting coil, and a superconducting coil and a cryostat are provided between the superconducting coil and the cryostat. There is a vehicle-mounted superconducting magnet system for maglev transportation as provided in the above embodiments.

Since the maglev traffic train adopts the vehicle-mounted superconducting magnet system of the above-mentioned embodiment, please refer to the above-mentioned embodiment for the beneficial effect brought by the vehicle-mounted superconducting magnet system of the maglev traffic train.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims (8)

1. A vehicle-mounted superconducting magnet system for maglev transportation, which is characterized in that it includes a cryostat with a vacuum working chamber, a refrigeration device for cooling the cryostat, and the cryostat is provided with a cold storage device. Low temperature cold storage structure, and superconducting coils;

   The cryostat is also provided with a cooling conduction structure connecting the refrigeration device, the low-temperature cold storage structure and the superconducting coil, and the cooling conduction structure is a bidirectional cooling conduction structure for bidirectionally transferring cold energy.
2. The vehicle-mounted superconducting magnet system for maglev transportation according to claim 1, wherein the superconducting coil is arranged in the middle of the cryostat, and the low-temperature cold storage structure is formed around the circumference of the superconducting coil The surrounding low-temperature cold storage structure arranged in the direction.
3. The vehicle-mounted superconducting magnet system for maglev transportation according to claim 1, wherein the superconducting coil and the low-temperature cold storage structure are arranged in parallel in the cryostat, and the cold-conducting structure is arranged in the between the superconducting coil and the low-temperature cold storage structure.
4. The vehicle-mounted superconducting magnet system for maglev traffic according to claim 1, wherein the superconducting coils include a first superconducting coil and a second superconducting coil arranged in parallel in the cryostat, the The cryogenic cold storage structure is laid on the same radial side of the first superconducting coil and the second superconducting coil.
5. The vehicle-mounted superconducting magnet system for maglev transportation according to any one of claims 1-4, wherein electrical leads connecting the superconducting coils to external electrical equipment are arranged in the cryostat,

   The through-chamber connectors of the electrical lead wires and the refrigerator cold head of the refrigeration device are both arranged on the top of the cryostat.
6. The vehicle-mounted superconducting magnet system for maglev transportation according to claim 5, wherein the electrical leads are connected to a Hall sensor and a temperature sensor, and the air pressure sensor and the temperature sensor are located on the superconducting coil;

   The exterior of the cryostat is also provided with an excitation power supply connected to the Hall sensor and a temperature controller of the refrigeration device connected to the temperature sensor.
7. The vehicle-mounted superconducting magnet system for maglev transportation according to claim 6, further comprising a vacuum system for reducing the air pressure of the cryostat, and the superconducting coil is arranged with a magnet connected by the electric lead wire. a temperature sensor to said vacuum system;

   The vacuum system also includes a molecular pump group arranged outside the cryostat.
8. A maglev traffic train, comprising a cryostat for cooling a superconducting coil, characterized in that the maglev according to any one of claims 1-7 is arranged between the superconducting coil and the cryostat Vehicle-mounted superconducting magnet systems for transportation.

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