Double operating mode squeezing type conveying system and design method thereof

Abstract

The invention relates to a double operating mode squeezing type conveying system scheme with stepped large-range flow adjustment of a solid-liquid rocket engine, belonging to the field of liquid propellant flow control of the solid-liquid rocket engine. The conveying system of the invention comprises a gas cylinder, a supercharging gas path and a control system thereof, a storage tank, a liquid path double operating mode main valve and a flow control component. By adjusting the supercharging gas flow of the supercharging gas path, the pressure of the storage tank in the working process of theconveying system is changed, and then the liquid path double operating mode main valve senses the pressure of the storage tank and changes the operating mode, thereby adjusting the supply of the liquid propellant flow, avoiding the defect of narrow flow adjusting range caused by independently adjusting the supercharging gas path or the liquid path, and realizing large-range and stepped change of the liquid flow supply in the working process, wherein the design of the liquid path double operating mode main valve realizes the functions of the main valve and operating mode conversion, and greatly simplifies the structure and design difficulty of the liquid pipeline part of the conveying system with large-range change of flow.

Description

【Technical field】 [0001] The invention relates to a design scheme of a double-working-condition step-type large-range flow-adjusting squeeze conveying system, which belongs to the field of liquid propellant flow control for solid-liquid rocket engines. 【Background technique】 [0002] During the working process of the solid-liquid rocket engine, one of the key technologies for thrust adjustment is to adjust the propellant flow. [0003] In the solid-liquid rocket motor delivery system, the extrusion delivery system is generally used. Among them, there is a plan to use high-pressure gas cylinders to pressurize the propellant tank to stabilize the pressure of the tank to ensure a stable flow rate; there are also plans to use the self-pressurized delivery system using the high saturated vapor pressure of the propellant itself, such as D.Van In the solid-liquid sounding rocket introduced by Pelt, J.Hopkins, etc. in "Overview of a 4-inch od paraffin-based hybrid sounding rocket p...

AI Technical Summary

Problems solved by technology

At present, most solid-liquid rocket engines or liquid rocket engine delivery systems cannot adjust the propellant flow in a wide range due to the simple pressurized gas and liquid pipelines. There are two reasons: 1. Only change the storage tank The pressure method or the method of changing the liquid flow control element (such as a cavitation venturi tube), the flow change range is narrow; 2. The problem of excessive pipeline loss and propellant accumulation in the pipeline caused by the large-scale flow change of the propellant , making it impossible to practically use

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