Spray pipe plug cover structure for solid-liquid rocket engine ground test

Abstract

The invention discloses a spray pipe plug cover structure for a solid-liquid rocket engine ground test. According to the spray pipe plug cover structure, the function of reliably breaking a diaphragm when the pressure intensity of a combustion chamber reaches a set value can be achieved, and the function of the diaphragm in the real working process of a spray pipe can be completely simulated in the test. The spray pipe plug cover structure comprises the diaphragm, a spray pipe plug cover and a long screw, wherein the plug cover diaphragm and a sealing ring are arranged at the end face of the outlet of the spray pipe in a combined mode and are positioned by a spray pipe plug cover tool. The diaphragm, the sealing ring and the spray pipe plug cover are positioned by a spray pipe shell and are fixedly connected and fastened to the head of the spray pipe through a long bolt so as to fix the position of the diaphragm. According to the spray pipe plug cover structure, the diaphragm, the spray pipe plug cover, a spray pipe heat insulation layer and the spray pipe shell are sealed through the sealing ring, so that the air impermeability of the combustion chamber is guaranteed; the diaphragm is convenient to process and install, and the uniformity of the breakage pressure intensity of the diaphragm is good through repeated test verification; and just the diaphragm needs to be replaced during repeated tests, and the spray pipe can be repeatedly used, so that the economical efficiency is good.

Description

technical field [0001] The invention relates to the technical field of solid-liquid rocket engines, in particular to a structure for simulating nozzle plugging for solid-liquid rocket engine ground tests. Background technique [0002] Compared with conventional solid or liquid rocket motors, solid-liquid rocket motors have advantages in terms of safety, economy, thrust adjustment characteristics and multiple start characteristics due to their own structural characteristics, and have attracted the attention of many researchers. The solid-liquid rocket engine uses liquid oxidant and solid fuel as propellants. The liquid oxidant enters the engine head cavity through the pipeline of the delivery system, enters the engine through the injection panel and reacts with the solid fuel for combustion, and finally is ejected from the nozzle to generate thrust. The structure of the combustion chamber nozzle of the solid-liquid rocket engine is similar to that of the solid rocket engine, ...

AI Technical Summary

Problems solved by technology

[0005] The bonding of the nozzle cap is a one-time process, and the rupture pressure of the nozzle is not easy to control, which is not conducive to the study of the difference in ignition performance under different rupture pressures

The test is carried out by bonding the nozzle to the cap. The nozzle can only be bonded once, and the nozzle needs to be replaced when the test is repeated. The cost is high and the repeatability is poor.

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