Energy storage sealing structure and dynamic sealing device for high-pressure easily vaporized medium

Abstract

The invention relates to the technical field of sealing, in particular to an energy storage sealing structure and a dynamic sealing device for a high-pressure easily vaporized medium. The energy storage sealing structure comprises at least one elastic shell and at least one energy storage elastic piece, wherein the elastic shell is provided with a pair of oppositely-arranged elastic arms, one endsof the pair of elastic arms are connected, and an opening allowing a medium to enter the space between the pair of elastic arms is formed by the other ends of the pair of elastic arms; each elastic arm comprises a first supporting arm and a second supporting arm which are arranged to form an included angle, and a first included angle between the first supporting arm and the axis of the elastic shell is greater than a second included angle between the second supporting arm and the axis of the elastic shell; and the at least one energy storage elastic piece is arranged in the space of the elastic shell, is used for supporting the elastic shell and deforms to store energy under the action of pressure. The energy storage sealing structure is simple and good in sealing effect.

Description

technical field [0001] The invention relates to the field of sealing technology, in particular to an energy storage sealing structure and a dynamic sealing device for high-pressure easily vaporized medium. Background technique [0002] As an important part of the liquid oxygen methane engine, the liquid oxygen pump is used to deliver the low-temperature liquid oxygen required for the engine to work. The liquid oxygen pump is next to the methane pump, and a sealing device is usually set between the liquid oxygen pump and the methane pump in the liquid rocket engine turbo pump to prevent leakage of the working medium. At present, the sealing devices used in low temperature environment at home and abroad are mainly divided into two forms: [0003] One is a non-contact seal, the principle of which is to use the partial gap of the labyrinth to realize step-by-step decompression and sealing, such as floating rings, labyrinth seals, etc. This type of sealing structure is simple, ...

AI Technical Summary

Problems solved by technology

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the defects that the high-pressure dynamic sealing device in the prior art is complicated in structure and easily fails to cause medium leakage, thereby providing an energy-storage sealing structure with a simple structure and good sealing effect and used for high-pressure Dynamic sealing device for easily vaporized medium

[0007] Another technical problem to be solved by the present invention is to overcome the defects in the prior art that the static ring is easy to collide with the moving ring after wear and tear, which affects the sealing effect

[0008] Another technical problem to be solved by the present invention is to overcome the defect that the sealing end faces of the moving ring and the static ring are unstable due to friction before and after work, resulting in poor sealing effect

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