Combined nozzle fuel gas fluid control valve

Abstract

The invention discloses a combined nozzle fuel gas fluid control valve using fuel gas to control fluid. The control valve comprises a securing ring, a central cone, a valve body, a fuel gas interface,a filling ring, a spraying tube and a back end cover, wherein one end of the valve body is connected with the securing ring, and the other end is connected with the back end cover; the control valveof the invention is connected with a fluid control variable thrust engine by twelve M12 high-strength bolts and then in threaded connection with a solid propellant fuel gas generator; the fuel gas interface welded on the fluid control valve body is communicated with a filling ring hole arranged in the valve body, so that the control fluid can be tangentially sprayed in the fluid control variable thrust solid engine so as to adjust the thrust of the engine. The control valve of the invention has the advantages of simple structure, convenient assembly and good thermal protection effect.

Description

technical field [0001] The invention belongs to the technical field of solid rocket motors, and in particular relates to a fluid control valve using gas to control flow in the variable thrust solid motor technology. Background technique [0002] The fluid control variable thrust engine injects tangential control flow through the fluid control valve on the engine to force the gas to rotate, increase the flow resistance, change the balance pressure of the combustion chamber, and then affect the propellant burning rate, so as to realize the control of gas generation and discharge. Quantity control to achieve the purpose of adjusting the thrust. A vortex valve structure is mentioned in the existing published literature "Effect of Swirl Valve Geometric Parameters on Thrust Regulation Characteristics of Solid Engines ("Propulsion Technology", Vol.28, No.4, 2007, p352-355)". The vortex valve structure in this paper is to introduce the control flow into the vortex chamber through t...

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Problems solved by technology

However, when the vortex valve structure in this paper uses the gas control flow generated by the solid propellant gas generator, since the nozzle hole is the throat of the gas generator, it must withstand the erosion and ablation of high temperature, high pressure, and high-speed gas flow, and The filling ring structure in the literature is an overall structure of ordinary carbon steel, which cannot withstand the action of high-temperature gas flow, and will also cause the nozzle hole to become larger, so that the stable operation of the engine cannot be guaranteed, and the filling ring may burn out, resulting in engine failure

Moreover, when hot gas is used as the control flow, since its temperature is as high as 1300°C, it will make general metal materials unusable.

Therefore, general metal materials cannot be used as gas pipelines

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