A slidable double-barrel structure pressure stabilization chamber for direct-coupled tests of solid impulse engines

Abstract

The present invention proposes a slidable double-barrel structure surge chamber for the direct-coupled test of solid impulse engines, which is composed of a cabin structure and a sliding structure. The cabin structure includes a front hatch cover, a rear hatch cover, an outer cylinder and an inner cylinder ; The sliding structure includes a cabin support component and a roller mechanism. The cabin body adopts a double-tube structure, the inner tube runs through the dowel bar, and the air flow is filled between the inner and outer tubes. The rear hatch cover is welded, the front hatch cover is threaded, sealed with a sealing ring, and has good air-tightness; the bottom of the pressure stabilization cabin The sliding structure, during the test, will cause the pressure stabilization cabin to produce a small displacement degree of freedom in the axial direction, which meets the requirements of displacement compensation, thereby eliminating the deformation of the bellows and the influence of the additional thrust on the thrust measurement. The present invention has been improved on the structure of the pressure stabilization chamber in the past. The structure is simple and novel, and the performance is reliable. It has been applied in the direct-connected test system at present. It has been proved by use that this design has reached the expected goal.

Description

technical field [0001] The invention relates to the technical field of direct-connection tests of solid-impact engines, in particular to a slidable double-barrel structure pressure stabilization chamber for direct-connection tests of solid-impact engines. Background technique [0002] In the direct-coupled test of the solid-impact engine, the simulated incoming air generated by the direct heating of the air by the oxygen / alcohol heater needs to enter the plenum chamber for rectification to ensure a sufficiently stable airflow into the afterburner chamber of the solid-impact engine. Therefore, The pressurized chamber is a particularly important part of the whole test device. [0003] In the current direct-coupled test device for solid-impact engines, in order to avoid interference between the surge chamber and the dowel rod and other components, the surge chamber is often located at one end of the entire test and measurement device, which makes it difficult to enter the solid...

AI Technical Summary

Problems solved by technology

However, during the test, it was found that the thermal expansion and contraction of the bellows itself and the additional pipeline axial thrust generated by the end of the pipeline will affect the thrust measurement accuracy

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