Gas flow regulating device for solid rocket ramjet driven by linear motor

Abstract

The invention discloses a solid rocket ramjet fuel gas flow regulation device driven by a linear motor. The nozzle throat area of a fuel gas generator is changed through the linear motor driving a cone-shaped valve head, and thus the fuel gas flow of the fuel gas generator is regulated; an inner shell structure is formed in the fuel gas generator, a thermal insulation bushing is mounted in an inner shell, the tubular linear motor is arranged in the thermal insulation bushing, a rotor of the linear motor is fixed in the thermal insulation bushing, a stator of the linear motor is fixedly connected with one end of a valve rod, the other end of the valve rod is fixedly connected with the cone-shaped valve head which stretches into a spray pipe of the solid fuel gas generator, one end, close to the cone-shaped valve head, of the valve rod is matched with an inner hole of the thermal insulation bushing, an annular groove is arranged, a movable sealing piece is arranged in the annular groove, and a pressure sensor is mounted at a rear seal head of the fuel gas generator. According to the solid rocket ramjet fuel gas flow regulation device driven by the linear motor, fuel gas flow can be accurately and randomly regulated, the precision is high, the structure is simple and compact, the size is small, the weight is light, and the sealing effect is reliable.

Description

technical field [0001] The invention belongs to the field of solid rocket ramjet engines, in particular to a gas flow regulating device for solid rocket ramjet engines driven by a linear motor. 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 disc valve, and cone valve. The existence of the needle valve cone improves the uniformity of gas velocity, helps the diffusion of gas, impr...

AI Technical Summary

Problems solved by technology

Although it is beneficial to increase the feedback, it needs to increase the gas source equipment, the structure is complex, the response speed is slow, and because 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 type gas flow regulation system, which is driven by a hydraulic system and also has a large volume

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