Non-metal Dewar container of high temperature superconduction magnetic suspension experiment vehicle

Abstract

The invention provides a non-metallic Dewar type container used for a high-temperature levitated superconducting magnet trial train. The container consists of a non-metallic upper cover (1) and a non-metallic container body (2), wherein the upper cover (1) is provided with an air tap (11); the bottom of the upper cover (1) is provided with a sealed thermal insulation layer (12); the side wall of the container body (2) is a sandwich structure consisting of an inner layer (21) and an outer layer (22), wherein a heat-insulating material (23) is filled between the inner layer and the outer layer. The Dewar type container is applicable to the high-temperature levitated superconducting magnet trial train, does not have eddy current loss, or magnetic effect to a high-temperature magnetic levitated system during use process, does not require maintenance, and has the advantages of simple structure and low cost.

Description

technical field [0001] The invention relates to a high-temperature superconducting magnetic levitation experimental vehicle device. Background technique [0002] As a relatively ideal container for storage of liquid gas, low temperature research and protection of crystal components, the Dewar vessel provides important conditions for research in the field of low temperature. Now the Dewar container is widely used as a multi-layer heat-insulating container. It is composed of many metal-coated film sheets that are separated by high-vacuum interlayers, overlap each other and have high reflectivity. It has good thermal insulation effect and complex structure, and the outer layer is usually metal. In the test of the high-temperature superconducting maglev experimental vehicle, a Dewar container is also required to store low-temperature liquid nitrogen and superconducting materials, so that the superconducting materials can work stably at the low temperature of liquid nitrogen. ...

AI Technical Summary

Problems solved by technology

[0003] Existing Dewar containers are used in the high-temperature superconducting magnetic levitation test vehicle and there are the following problems: 1. In order to reduce the loss of liquid nitrogen, the walls and bottom of the Dewar container are relatively thick

When this kind of thick-bottomed container is used for the high-temperature superconducting magnetic levitation experiment, the distance between the superconductor and the guide rail is too far, and it cannot generate enough levitation force and guiding force

2. When the metal-plated diaphragm and metal shell in the Dewar vessel move in the strong magnetic field of the maglev vehicle, the metal Dewar vessel cuts the magnetic field and generates eddy currents, resulting in energy loss and heating of the Dewar vessel

At the same time, under the strong magnetic field of the high-temperature superconducting maglev test vehicle, the metal Dewar container will absorb a large number of magnetic field lines, reducing the magnetic field effect of the maglev system and affecting its normal operation.

3. Air leakage will inevitably occur in the high-vacuum interlayer. It is necessary to use vacuum equipment regularly to maintain the vacuum state of the vacuum interlayer of the container. The workload is large, the structure is complex, and the cost is high.

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