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Superconducting magnet cooling device for superconducting maglev train and its application method

A technology for magnetic levitation trains and superconducting magnets, applied in superconducting magnets/coils, magnetic objects, electrical components, etc., to achieve the effects of reliable refrigeration, weight reduction, and simplification of refrigeration

Active Publication Date: 2021-01-01
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the high-temperature superconducting maglev train is still in the research and development stage and has not yet been put into commercial operation.

Method used

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  • Superconducting magnet cooling device for superconducting maglev train and its application method
  • Superconducting magnet cooling device for superconducting maglev train and its application method
  • Superconducting magnet cooling device for superconducting maglev train and its application method

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Experimental program
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Effect test

Embodiment 1

[0033] figure 1 Shown is a schematic diagram of a cooling device of a preferred embodiment of the present invention, figure 2 yes figure 1 The internal structure diagram of the cooling chamber shown.

[0034] figure 1 The cooling device shown includes a cryogenic refrigerator 1, a cooling plate 2 and a cooling cavity; one end of the cooling plate 2 is connected to the cryogenic refrigerator 1, and the other end is connected to the cooling cavity; a superconducting magnet 6 is installed in the cooling cavity.

[0035] The low-temperature refrigerator 1 of this embodiment is directly connected to the cooling plate 2, and the cooling plate 2 is directly connected to the cooling cavity, and directly conducts the cooling capacity of the low-temperature refrigerator 1 to the cooling cavity, and has a simple structure and is suitable for low-temperature refrigerators. 1 Make the working temperature of the superconducting magnet 6 be the nitrogen fixation temperature range of 20K-...

Embodiment 2

[0045] image 3 Shown is the cold guide plate structure of another preferred embodiment of the present invention.

[0046] Considering the inevitable vibration during the traveling process of the maglev train applied in the present invention and when the train leaves the track and returns to the track, in order to prevent the vibration from causing the superconducting magnet 6 to shift in the cooling chamber, the traditional method is fixed by various fixing structures. Magnets in a maglev train. However, in the traditional method, the number of structures to fix the magnet is positively correlated with the quality, and too many and heavy fixing structures not only affect the heat dissipation effect of the superconducting magnet 6, but also increase the weight load of the train, which reduces the operating efficiency of the train, and Operating speed and passenger capacity are also affected accordingly. In order to solve the vibration problem of the maglev train, and the con...

Embodiment 3

[0050] This embodiment describes in detail the usage method of the superconducting magnet cooling device of the superconducting maglev train of the present invention through specific experiments.

[0051] Step 1. Install the superconducting magnet in the cooling chamber, close the cooling chamber and evacuate it;

[0052] Step 2: Turn on the low-temperature refrigerator, and directly conduct cooling through the cooling plate to cool the cooling cavity, so that the superconducting magnet is cooled to the working temperature.

[0053] In step 1, firstly, the sealed cooling chamber installed with the superconducting magnet 6 is evacuated to avoid water vapor condensation. After the vacuum is exhausted, the low-temperature refrigerator 1 is turned on, and the cold energy is transferred to the superconducting magnet 6 through the close contact of the cooling plate 2, the cooling chamber and the superconducting magnet 6, and the superconducting magnet 6 is cooled to below operating...

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Abstract

The invention discloses a superconducting magnet cooling device for a superconducting maglev train. The device includes a low-temperature refrigerator, a cooling guide plate, and a cooling cavity. Oneend of the cooling guide plate is connected with the low-temperature refrigerator, and the other end is connected with the cooling cavity. Superconductive magnets are installed in that cooling cavity. The cooling cavity is provided with a cooling guide plate connected with an upper end cover. The cooling guide plate is positioned among the superconducting magnets inside the cooling cavity. The cooling guide plate is close to the inner wall of the cooling cavity and each superconducting magnet. The cooling guide plate is a cold guiding material, the cooling guide plate is connected with the upper end cover through a suspension rod, the cooling guide plate is provided with a limiting plate around the superconducting magnets to limit the movement of the superconducting magnets. The limit plate is a cold conduction material. The invention also discloses a using method of the cooling device, which takes various power supply reliability conditions into account through direct conduction refrigeration or nitrogen fixation auxiliary refrigeration. The invention has the advantage of simple structure, takes both refrigeration capability and anti-vibration performance into account, and is simple and quick.

Description

technical field [0001] The invention relates to the field of magnet cooling for superconducting maglev trains, in particular to a superconducting magnet cooling device and a using method for superconducting maglev trains. Background technique [0002] The magnetic levitation technology can effectively avoid the friction loss caused by contact, and can greatly improve the operating efficiency and the service life of the equipment. Applying this technology to a train can become a maglev train. The maglev train has the advantages of fast running speed, low noise and low maintenance cost, and has become one of the mainstream directions for the development of a new generation of high-speed trains. The levitation and propulsion system of the maglev train all need to rely on the electromagnetic force between the magnet on the car body and the ground magnet to complete. [0003] Traditional maglev trains use permanent magnets or electromagnets to generate electromagnetic force to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F6/04
Inventor 黄振董方亮郝鲁宁
Owner SHANGHAI JIAO TONG UNIV
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