A high-precision gas decompression device with impact resistance and reverse unloading distributed pressure introduction

Abstract

The invention provides an impact-resistant reverse unloading distribution type high-precision gas pressure reduction device. The device is designed by adopting a distribution pressure guide structure, outlet low-pressure gas at different positions is guided to the upper cavity of the valve core through feedback holes located in different sections of the valve core, the pressure deviation of the upper cavity and the lower cavity of the valve core is reduced, the upper cavity of the pressure reducing device is rapidly and accurately modeled in the adjusting process, and the sensitivity and the stability are improved. Meanwhile, the influence of inlet pressure is eliminated by adopting a reverse unloading structure design, the valve core has the unloading rod function, the high-pressure stress part of the valve element is isolated from the low-pressure stress part through the sealing assembly, pressure unloading design is realized, the upper sealing surface and the lower sealing surface of the valve body are subjected to equal-section design, so that the acting force of the inlet pressure acting on the upper end surface and the lower end surface of the valve core moving part is counteracted, the complete unloading of the inlet pressure is realized, so that the valve element is not influenced by the change of the inlet pressure in the adjusting process, so that the opening degree of the valve element is only influenced by the pressure change of the outlet.

Description

technical field [0001] The invention belongs to a high-pressure gas decompression device, in particular to a high-precision gas decompression device with impact resistance, reverse unloading, distribution and pressure introduction, which can be used as a high-pressure gas decompression device for liquid rocket engines, satellite on-orbit execution power systems, and ground test systems. Pressure device to achieve stable low-pressure gas output and complete gas delivery management. Background technique [0002] In the development of the final attitude control power system, due to the harsh operating environment, the engine needs to work reliably in the storage environment of -55°C to 60°C and the working environment of -35°C to 60°C, and the product has to undergo ground transportation during work Vibration, hanging flight vibration, autonomous flight vibration, shock and overload and other mechanical environment test assessments. As the pressure regulating device of the pow...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems existing in the structure of the existing pressure reducing valve, the present invention provides a high-precision gas pressure reducing device with impact resistance, reverse unloading and distributed pressure, which can effectively improve the impact resistance of the pressure reducing valve, the accuracy of the outlet pressure and the adjustment Stability, reducing the static and dynamic pressure difference of the pressure reducing valve, ensuring that the pressure reducing valve meets the requirements of outlet pressure regulation accuracy in a wide range of temperature environments

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