Electric plunger valve type solid rocket ramjet gas flow regulating device

Abstract

The invention discloses a gas flow regulation device of an electric plunger valve type solid rocket ramjet engine. A valve body is of a cylinder structure. An engine end cover and spray pipes are structurally integrated (in specific engineering application, threaded connection can be adopted). A motor is located on the engine end cover. The motor is connected with a transmission shaft through a coupling (the coupling is omitted in the figure). The transmission shaft is in thread driving with a transmission rod. The transmission rod is connected with plunger valves through screws. The spray pipes are perpendicular to the plunger valves. The side faces of the spray pipes are provided with cylindrical holes. The motor rotates to drive the plunger valves to slide back and forth in the cylindrical holes. The area of the throat part of each spray pipe is adjusted. The plunger valves and the cylindrical holes in the side faces of the spray pipes are sealed through sealing rings. The gas flow regulation device is simple in structure, accurate in control, reliable in work, low in cost and good in realizability.

Description

technical field [0001] The invention belongs to the technical field of gas flow regulation for solid rocket ramjet engines, in particular to an electric plunger valve type gas flow regulation device for solid rocket ramjet engines. Background technique [0002] The solid rocket ramjet has the advantages of both ramjet and rocket engines, and has the advantages of high specific impulse, small size, light weight, compact structure, reliable operation, and low cost. In order to ensure that the engine has the best working performance and good thrust adjustment capability, the gas flow of the solid rocket ramjet should be adjusted. At present, there are four main schemes for gas flow regulation: fixed flow type, choke type, non-choke type and swirl valve type. Flow regulating valves usually adopt a variety of configurations, such as plunger spool valve, rotary cam valve, rotary slide disc valve, and cone valve. The transmission mechanisms used in traditional control systems gen...

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Problems solved by technology

Although the structure is simple and the response speed is fast, it needs to add a gas source device, which occupies a large space. Since the gas is prone to leakage, it is not easy to achieve precise control in the process of adjusting the gas flow.

Wang Yilin of Northwestern Polytechnical University proposed a non-coaxial needle-valve gas flow regulation system with a 90-degree angle between the nozzle and the combustion chamber. Although the throat plug rod is easy to seal and thermal protection is easy to achieve, the experimental system is large and cannot achieve precise control.

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