Reversing valve of liquid rocket engine and liquid rocket engine

Abstract

The invention provides a reversing valve of a liquid rocket engine and the liquid rocket engine. The reversing valve comprises an auxiliary shell, a main shell, a sealing piece, a thrust assembly and a valve body. The inner side of the auxiliary shell is provided with a first channel allowing a gas medium to flow and a second channel different from the first channel in extending direction; the main shell is provided with a first medium inlet, a first medium outlet and a second medium outlet; the surface of the thrust assembly is sleeved with the sealing piece, and the outer side surface of the sealing piece abuts against the inner wall of the auxiliary shell; one end of the thrust assembly is arranged in the auxiliary shell through the sealing piece, and the other end of the thrust assembly is used for pushing the valve body located in the main shell to move; the sealing piece is a spring plug ring, the spring plug ring comprises a main body part, an annular accommodating part and an elastic piece, the elastic piece is arranged in the annular accommodating part, and an annular protrusion used for abutting against the elastic piece in a matched mode is arranged on the inner wall of the annular accommodating part; and an annular concave part is arranged on the circumferential outer surface of the main body part. Compared with the prior art, the sealing effect can be improved, and loss of a liquid medium is reduced.

Description

technical field [0001] The invention relates to the technical field of valves, in particular to a reversing valve of a liquid rocket engine and the liquid rocket engine. Background technique [0002] With the rapid development of the aerospace industry, various technologies involved in the rocket field have also achieved rapid progress. Valves are an important part of starting and shutting down liquid rocket engines. The medium of the cryogenic liquid rocket engine is an ultra-low temperature propellant, the temperature range of the medium is usually around 20K-120K, and the pressure is above 10MPa. The valve operating gas is usually high-pressure gas with a pressure of about 20MPa. [0003] At present, in addition to liquid hydrogen and liquid oxygen, liquid propellants used in domestic active low-temperature liquid rocket engines, some domestic liquid rocket models under research also use liquid methane as propellant. In order to facilitate the use of propellant, it is ...

AI Technical Summary

Problems solved by technology

However, the forming of large-sized metal bellows is difficult, the production cycle is long, the space structure is large, the purchase cost is high, the service life is low, and the reliability is poor, etc.

In addition, the design of the precious metal-coated sealing ring will cause excessive friction, which will affect the efficiency of the valve.

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