Composite split type high-pressure sealing pair

Abstract

The invention relates to a composite split type high-pressure sealing pair, which comprises a valve seat, a valve spool base, a non-metal sealing ring and a metal fixing ring. An annular sealing groove is arranged on the valve spool base, and the non-metal sealing ring and the metal fixing ring are arranged in the annular sealing groove; a chamfer is arranged at one end, which is close to the valve seat, of the inner side surface of the metal fixing ring; an annular boss is disposed on the outer side surface of the metal fixing ring and corresponds to the chamfer; the outer diameter of the annular boss is slightly larger than the inner diameter of the non-metal sealing ring; the depth of the annular boss is smaller than that of the non-metal sealing ring; the inner wall of the annular sealing groove presses the chamfer of the metal fixing ring in an edge rolling manner; and an outwards protruded annular triangular step is arranged on the valve seat and is opposite to the non-metal sealing ring, and an inwards concave annular holding groove is arranged on the outer side of the triangular step. The composite split type high-pressure sealing pair can meet requirements of sealing of high-pressure media, and is reasonable in structure and reliable in performance.

Description

technical field [0001] The invention belongs to the field of valve body sealing, and relates to a high-pressure sealing pair, in particular to a composite split type high-pressure sealing pair. Background technique [0002] In the liquid oxygen kerosene engine, the engine working pressure is high and the sealing requirements are strict, which puts forward higher requirements for the internal sealing pair of the valve. Using the traditional metal-non-metal sealing type, the non-metal sealing ring is prone to large deformation and falling off. Since the high-pressure system has greatly improved the performance of the engine, the application range of high-pressure valves has also become more useful. With the development of the technical level of aerospace models, the pressure of the medium used in aerospace models is getting higher and higher, and the sealing performance is also increasing. put forward higher requirements. Higher reliability, tightness, and strong pressure bea...

AI Technical Summary

Problems solved by technology

[0002] In the liquid oxygen kerosene engine, the working pressure of the engine is high and the sealing requirements are strict, which puts forward higher requirements for the internal sealing pair of the valve. Using the traditional metal-non-metal sealing type, the non-metal sealing ring is prone to large deformation and falling off.

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