High-voltage insulation current lead structure

Abstract

The invention discloses a high-voltage insulation current lead structure, and relates to the technical field of superconducting equipment. The structure comprises a lower sealing piece, an aluminum tube, an epoxy sleeve and a copper conductor; the aluminum tube sleeves the copper conductor, and an annular first gap cavity is formed between the inner wall of the aluminum pipe and the outer wall ofthe copper conductor; the epoxy sleeve is coated outside the aluminum tube; the lower sealing piece is mounted at one end part of the epoxy sleeve and is in sealing connection with the epoxy sleeve; aconnecting part connected with the lower sealing piece is arranged at one end, extending out of the lower sealing piece, of the copper conductor; and a second gap cavity is defined by one end, facingthe lower sealing piece, of the aluminum tube, the inner end wall of the lower sealing piece, the inner wall of the epoxy sleeve and the outer wall of the copper conductor. By means of the design, the lower sealing piece only makes contact with the epoxy sleeve and does not make contact with an internal aluminum tube, in the cooling process of immersion into liquid nitrogen, the cooling speed canbe effectively controlled, and the temperature nonuniformity in the longitudinal direction can be optimized and improved, so the relative deformation quantity between the aluminum tube and the epoxysleeve is controlled, damage is not likely to happen, and the structure can work better in a low-temperature and high-voltage environment.

Description

technical field [0001] The present application relates to the technical field of superconducting equipment, in particular to a high-voltage insulated current lead structure. Background technique [0002] The high-voltage insulated current leads used in superconducting equipment are used as the interface between superconducting equipment such as superconducting current limiters and the external power grid. They span the room temperature range to the liquid nitrogen temperature range. The electric field gradient is large, which is the key to system heat leakage and overall insulation. The key components. At present, the high-voltage insulated current leads used in superconducting equipment are insufficient in design, and the performance of the high-voltage insulated current leads is unstable, and they are prone to breakdown when used in a low-temperature and high-pressure environment. Contents of the invention [0003] In view of this, the purpose of this application is to ...

AI Technical Summary

Problems solved by technology

At present, the high-voltage insulated current lead used for superconducting equipment is not stable due to the design deficiency, and the performance of the high-voltage insulated current lead is unstable, and it is easy to be broken down when used in a low temperature and high pressure environment.

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