High-pressure fluid multi-stage pressure reducing device

Abstract

The invention belongs to a pressure reducing device and a debugging system, and provides a high-pressure fluid multi-stage pressure reducing device in order to solve the technical problems that a multi-stage pore plate pressure reducing mode is mostly adopted when high-pressure large-flow fluid is subjected to pressure reducing at present, pressure reducing pipeline arrangement is not facilitated, and the dismounting and mounting workload is large, and the high-pressure fluid multi-stage pressure reducing device comprises a shell and an inner core which are coaxially arranged. The shell is of a hollow structure with the two ends open, and the two ends of the shell are used for being connected with external fluid pipelines respectively. The inner core is fixedly arranged in the shell. A first-stage throttling structure, a second-stage throttling structure and a third-stage throttling structure are sequentially arranged in the shell from the fluid inlet end to the fluid outlet end, and the first-stage throttling structure, the second-stage throttling structure and the third-stage throttling structure are coaxially arranged outside the inner core and used for sequentially throttling flowing fluid. Expansion cavities are formed in the positions, between the first-stage throttling structure and the second-stage throttling structure and between the second-stage throttling structure and the third-stage throttling structure, in the shell correspondingly and used for sequentially reducing the pressure of fluid flowing through the expansion cavities.

Description

technical field [0001] The invention belongs to a decompression device, in particular to a high-pressure fluid multistage decompression device. Background technique [0002] In the semi-system test of the pump-pressed liquid rocket engine, the pressure of the propellant after the engine pump can reach more than 10MPa. It is necessary to reduce the pressure of the high-pressure propellant after the engine pump from more than 10MPa to less than 1MPa, and return it to the recovery container. [0003] At present, for the depressurization of high-pressure and large-flow fluids, in order to prevent cavitation of the fluid, most of them use multi-stage orifice plate depressurization. When this method is adopted, the spacing between the orifice plates at all levels needs to be greater than 10 times the diameter of the pipeline, which is not conducive to the arrangement of the depressurization pipeline. At the same time, when the engine operating conditions change, the size of the p...

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Problems solved by technology

[0004] In order to solve the problem of pressure reduction of high-pressure and large-flow fluids, the present invention mostly uses multi-stage orifice plates to reduce pressure. There are large distances between orifice plates at all levels, which is not conducive to the arrangement of pressure-reducing pipelines, and when the working conditions of the engine change, the pressure-reducing method can be adjusted. For the technical problem of large disassembly and assembly of orifice plate size, a high-pressure fluid multi-stage depressurization device is provided

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