Pilot pneumatic valve applied to rocket power system

Abstract

The invention provides a pilot pneumatic valve applied to a rocket power system. A shell is arranged outside the pilot pneumatic valve, the left end and the right end of the shell are sealed through liquid path plugs, the lower end of the shell is sealed through an air path plug, an armature is installed on the upper portion of the shell, a guide sleeve is sleeved with the shell, and an air valve element guide sleeve is sleeved with the guide sleeve in the axial direction of the guide sleeve. A liquid valve element guide sleeve is installed on the outer side of the guide sleeve in the radial direction of the guide sleeve and between the guide sleeve and the liquid path plug, through holes are machined in the air valve element guide sleeve and the guide sleeve at the position of the extension line of the axis of the liquid valve element guide sleeve, an air valve element is installed in the air valve element guide sleeve, an air ejector rod abuts against the air valve element, and a spring is installed between the air valve element and the air path plug. A liquid valve element is installed in the liquid valve element guide sleeve, the liquid ejector rod abuts against the liquid valve element, and a spring is installed between the liquid valve element and the liquid path plug. The structure is compact, a liquid path is effectively cooled, the service life of the valve element is prolonged, and the response speed is increased.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic valves in the field of aerospace, and in particular relates to a pilot pneumatic valve applied to a rocket power system. Background technique [0002] Pilot-operated solenoid valve, when energized, the armature drives the valve stem by electromagnetic force, the valve core in the air circuit opens, the valve core in the air circuit closes, the gas enters the air chamber from the valve core in the air circuit, forms high pressure in the air chamber, and enters the air chamber in the liquid circuit. The seal of the push rod forms a pressure difference of high gas and low liquid. Under the action of the pressure difference, the gas pressure pushes the main valve core of the liquid circuit to move to open the main valve port; when the power is turned off, the electromagnetic force disappears, and under the action of the spring force , the lower spool of the gas path is closed, the spool of the...

AI Technical Summary

Problems solved by technology

[0003] The technical problem solved by the present invention is to provide a pilot pneumatic valve applied to the rocket power system, which can better solve the above problems. For the problem that the temperature of the liquid in the valve is too high, the working condition of the pilot pneumatic valve of the present invention is in Continuous pulse is required during use, and the liquid medium has a relatively high temperature when it enters the valve body, so there will be heat conduction between the gas, the guide sleeve and the liquid due to the temperature difference, and the metal guide sleeve has good thermal conductivity. The heat of the liquid is absorbed and transferred to the gas, but the thermal conductivity of the gas is relatively poor, and a small amount of heat conduction occurs between the metal and the guide sleeve. The direction of the gas path boundary of the sleeve will continuously produce high and low pressure alternately, so the energy exchange between the gas and the guide sleeve is carried out through heat convection, and part of the heat of the guide sleeve and the liquid is taken away, which has a certain air cooling effect

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