C-shaped sealing ring

Abstract

The invention discloses a C-shaped ring. The C-shaped ring comprises a hollow and annular cladding layer, a middle layer and an internally-installed layer, wherein the middle layer is contained in a hollow structure of the cladding layer and tightly clings to the inner wall of the cladding layer; the internally-installed layer is arranged in the hollow structure of the cladding layer and clings to the inner wall of the middle layer; the sections of the cladding layer and the middle layer are in a C-shaped structure; the internally-installed layer is an annular spiral tightening spring wound by a normal-quadrangular-shaped wire and front and rear ends of the spiral tightening spring are welded; a smooth cladding surface is formed on the outer surface of the spiral tightening spring; the cladding surface tightly clings to the inner wall of the middle layer. The C-shaped ring has a high sealing performance; when a medium pressure or / and a temperature is / are changed, the stability of a sealing performance is kept by a compression-rebounding property of the spiral tightening spring and the sealing performance of a reactor pressure vessel is guaranteed; the C-shaped ring can be adaptive to high temperatures, high pressures, instant large temperature difference, and instant pressure fluctuation working conditions of a nuclear power station; meanwhile, the machining difficulty is greatly reduced.

Description

technical field [0001] The invention relates to the field of sealing of reactor pressure vessels of nuclear power plants, in particular to a C-shaped sealing ring for reactor pressure vessels. Background technique [0002] At present, pressurized water reactor is the mainstream reactor type of nuclear power plants. About 60% of the world's reactors are pressurized water reactors. Pressurized water reactor nuclear power plants are generally divided into two circuits: the primary circuit system and the secondary circuit system. The primary circuit system is called nuclear The island section, the secondary circuit system is a conventional island section with a steam turbine section and a generator section. The primary circuit system of the PWR nuclear power plant is completely separated from the secondary circuit system, and it is a closed circulation system. The principle flow of the nuclear power plant is: the main pump sends the high-pressure coolant into the reactor, and t...

AI Technical Summary

Problems solved by technology

Therefore, high requirements are put forward for the sealing performance of the seal, which cannot be met by conventional seals; in order to meet the high requirements of the above-mentioned sealing performance, the structure of the seal has its particularity, and its special structure The nature makes its processing technology more difficult

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