Mechanical sealing device for main circulating sodium pump

Abstract

The invention provides a mechanical sealing device for a main circulating sodium pump. The mechanical sealing device comprises a main shaft, a shaft sleeve, an upper end cover, a lower end cover, an annular sealing assembly and a clamping sleeve, wherein the main shaft is fixedly arranged relative to the main shaft of the sodium pump, the upper end cover is rotationally arranged relative to the shaft sleeve, the lower end cover is rotationally arranged relative to the shaft sleeve, the annular sealing assembly is arranged between the upper end cover and the lower end cover and used for formingsealing connection with the shaft sleeve, and the clamping sleeve is arranged on the periphery of the annular sealing assembly, and is positioned between the upper end cover and the lower end cover;and the inner cavity of the mechanical sealing device is divided into a sealing cavity and a cooling cavity which are separated from each other by the clamping sleeve, the annular sealing assembly ispositioned in the sealing cavity, a sealing medium fills the sealing cavity, and a cooling medium fills the cooling cavity. According to the mechanical sealing device, the sealing medium is sealed, the sealing medium in the sealing cavity can be cooled, the convection heat exchange efficiency is improved, and the temperature field in the sealing cavity is uniformly distributed.

Description

technical field [0001] The invention relates to a mechanical sealing device, more particularly, to a sealing device for a reactor main circulation sodium pump. Background technique [0002] The main cycle sodium pump is one of the key core equipment of the sodium-cooled fast reactor, and the mechanical seal is one of the key components of the main cycle sodium pump, which is related to the reliability of the main cycle sodium pump and even the operation of the entire sodium-cooled fast reactor and security. At present, my country is still in the initial stage of the development of sodium-cooled fast reactors, and the mechanical seals used for the main circulation sodium pump are basically dependent on imports. In order to realize the localization of major nuclear power equipment, save national foreign exchange resources, and allow my country's nuclear power to reach the world's advanced level without relying on foreign technology, it is necessary to carry out the design and...

AI Technical Summary

Problems solved by technology

Once the mechanical seal device of the main circulation sodium pump is damaged and fails, it will cause the isolation medium cavity to lose pressure, resulting in the loss of the final safety barrier of the high-temperature liquid sodium as the circulating medium, which will cause disastrous consequences

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