A non-peripheral opening flow-limiting booster check valve

Abstract

The invention relates to a one-way valve for a liquid rocket engine, in particular to a non-full-peripheral opening flow-limiting booster type one-way valve to solve the problem that the current engine one-way valve is used at a flow rate of 0.5 to 1.5 g / s. The flutter of the core is unstable, and even leads to the destruction of the engine structure. The technical solution adopted in the present invention is: a non-circumferential opening flow-limiting force-increasing check valve, including a valve body, a valve core, a spring and a retaining ring; There is at least one flow-limiting hole along the axial direction; the annular protrusion separates the valve body into an oil inlet chamber and an oil outlet chamber, and the oil outlet chamber is set as a two-stage stepped hole; one end of the valve core is provided with a Adapted to the two-stage raised platform, the outer surface of the large-diameter end of the two-stage raised platform is provided with multiple through grooves; there is a gap between the small-diameter end surface of the two-stage raised platform and the annular raised end surface on the side of the oil outlet chamber. Clearance; a spring is set on the spool located in the oil inlet chamber.

Description

technical field [0001] The invention relates to a one-way valve for a liquid rocket engine, in particular to a flow-limiting and boosting-type one-way valve with non-peripheral openings. Background technique [0002] The check valve is a valve commonly used in liquid rocket engine systems, and its function is generally to prevent the reverse leakage of the outlet medium. With the continuous development of aerospace technology, some systems require very little fluid flow, and even put forward the use requirements of 0.5 ~ 1.5g / s flow in the development of micro-engines. The existing conventional one-way valve, when used for such a small flow rate, the spool works unstable-chatter phenomenon, the guide surface of the spool is severely worn during the chattering process, the flow rate of the one-way valve and the front and rear pressure fluctuations also cause The engine propellant supply system oscillates and even leads to the destruction of the engine structure. Contents o...

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the problem that when the current engine check valve is used at a flow rate of 0.5 to 1.5 g / s, the check valve spool is fluttering and unstable, and even causes damage to the engine structure, and provides a non-full-circumference opening flow limiting booster type check valve

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