In-series redundant type device

Abstract

The invention provides a high-reliability in-series redundant type device, which comprises a single valve assembly, an inlet connector, a filter screen assembly, a throttling orifice plate and an outlet connector. The two single valve assemblies are used for controlling on-off of propellant, and the function of opening or closing the valve is achieved through axial movement of the internal movingpart. Reliable sealing when the single valve assembly is closed is achieved by pressing and attaching an internal non-metal sealing piece to the metal base. The two single valve assemblies are connected in series and fixedly welded, and the inlet connector is used for being connected with an upstream pipeline and further used for containing the filter screen assembly. The filter screen assembly isused for preventing excess materials in the working medium from entering the inner cavity of the valve; the outlet connector is used for being connected with a downstream engine. The orifice plate isused for adjusting the flow of the propellant. By means of the structural design, the kinematic pair design, the magnetic circuit design and the sealing pair design, the requirements for high sealingreliability, multiple action times, long service life, light weight and quick response can be met.

Description

technical field [0001] The invention relates to a highly reliable serial redundant device for a core cabin of a space station, in particular to a serial redundant device. Background technique [0002] The high-reliability series redundant device is an important part of the attitude and track control system of the 921 Phase III project. [0003] The 921 Phase III project has greatly improved the index requirements for 150N engines compared with Phase II, and the control valves matched with 150N engines have much stricter working times and life requirements. In order to meet the overall new indicators for 150N engine solenoid valves, According to the requirements of the engine control valve design task book, a series redundant reed solenoid valve is designed, which is used for the propellant supply of the 150N binary engine of the core module propulsion subsystem of the space station, and realizes engine ignition and shutdown. [0004] According to the requirements of the cor...

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Problems solved by technology

[0005] The highly reliable serial redundant device is different from the traditional propellant control valve in that the working frequency and leakage rate of the traditional propellant control valve cannot meet such strict requirements, and cannot be used for the 150N engine of the 921 third phase project

[0006] At present, there is no high-reliability series redundant device in China, and there is no public information on the design scheme of similar principles in foreign countries, and no description and report of similar technology to the present invention have been found. Therefore, the high-reliability series redundant device is a new design. field

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