One-way valve, rocket engine supercharging system and rocket engine

Abstract

The invention discloses a one-way valve, a rocket engine supercharging system and a rocket engine. The one-way valve comprises a guide cylinder, a valve body and a valve element. The guide cylinder is provided with an open end, a closed end and a first boss which transits from the closed end to the open end; the valve body is connected with the outer wall of the guide cylinder to form a main cavity, and is provided with an inlet channel and an outlet channel communicated with the main cavity; the axial cross section of the valve element is in a T shape, the small-diameter end of the valve element is a connecting end, the large-diameter end of the valve element is a force application end, the connecting end is movably arranged on a first boss in the guide cylinder through an elastic piece, and the force application end is used for sealing the inlet channel under the action of the elastic piece. A discharge cavity is formed between the closed end and the elastic piece, and a leakage opening is formed in the portion, forming the discharge cavity, of the guide cylinder and used for discharging media leaked from the main cavity to the discharge cavity. In the state that the force application end seals the inlet channel, the contact areas of the two surfaces in the thickness direction of the force application end and the main cavity are the same, so that the valve is prevented from being opened when the valve is reversely communicated with a high-pressure medium.

Description

technical field [0001] The invention relates to the technical field of liquid rocket engines, in particular to a check valve, a rocket engine supercharging system and a rocket engine. Background technique [0002] Check valves are widely used in industry, especially in liquid rocket engines, and are mainly used to control the one-way flow of system media such as booster systems and blow-off systems. The most commonly used in conventional liquid rocket engines is a simple positive unloading check valve. This kind of one-way valve has a simple structure, but it is prone to flutter under low flow conditions, which is unfavorable to the stability of the engine, and under high flow conditions, the flow resistance is relatively large and the performance loss of the engine is relatively large. Moreover, the commonly used one-way valve is easy to be opened when the high-pressure medium is reversed. Therefore, it is urgent to provide a one-way valve that can prevent chattering, has ...

AI Technical Summary

Problems solved by technology

By setting the cross-section of the spool as T-shaped, and after the T-shaped spool blocks the inlet channel, the two surfaces of the force-applying end of the T-shaped spool used to seal the inlet channel in its thickness direction have the same contact area with the main cavity , can effectively realize the reverse sealing of the one-way valve under high pressure, solve the problem that the valve core seal of the traditional one-way valve is easily damaged when the high-pressure medium is reversed, and can greatly increase the reverse airtight pressure of the engine

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