A hydraulic test device for solid rocket motor combustion chamber casing

Abstract

The invention relates to a water-pressure test device for a combustor shell of a solid-propellant rocket engine. The water-pressure test device comprises a force bearing vertical platform, a thrust frame, supporting frames, water-pressure sensors and the combustor shell provided with a front blocking cap and a rear blocking cap. The water-pressure test device is characterized by comprising an unloading mechanism, and the unloading mechanism is used for simulating the condition that the combustor shell is under the axial pressure. Compared with the prior art, the unloading mechanism is additionally arranged and used for simulating the condition that the combustor shell is under the axial pressure so that a water-pressure test can assess the working condition that the combustor shell bears an axial load while assessing the working condition that the combustor shell bears the internal pressure, a special test for assessing the condition that the combustor shell bears the axial load is omitted, and thus the preparation period is shortened; and the conditions that a traditional water-pressure testing mode cannot simulate the relief effect of engine spraying pipes on the shell internal pressure, and the combustor shell loses efficacy due to over-strict assessing are changed.

Description

technical field [0001] The invention belongs to the field of solid rocket motors, and in particular relates to a hydraulic test device for a casing of a solid rocket motor combustion chamber. Background technique [0002] The hydraulic test device of the solid rocket motor combustor shell is generally used to simulate the working conditions of the engine and evaluate the ability of the combustor shell to withstand internal pressure loads. [0003] At present, the commonly used hydrostatic test device includes a force-bearing vertical platform, a thrust frame, a support frame, a hydraulic pressure sensor, and a combustion chamber shell with a front plug and a rear plug. Connect the front joint and the rear joint of the chamber housing, seal the opening of the combustion chamber housing, and test the ability of the combustion chamber housing to withstand internal pressure loads with water pressure. This test method cannot simulate the unloading effect of the engine nozzle on t...

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Problems solved by technology

[0003] At present, the commonly used hydrostatic test device includes a force-bearing vertical platform, a thrust frame, a support frame, a hydraulic pressure sensor, and a combustion chamber shell with a front plug and a rear plug. Connect the front joint and the rear joint of the chamber housing, seal the opening of the combustion chamber housing, and test the ability of the combustion chamber housing to withstand internal pressure loads with water pressure. This test method cannot simulate the unloading effect of the engine nozzle on the internal pressure of the housing. , belongs to the strict assessment, and the failure of the combustion chamber shell is prone to occur. At the same time, the combustion chamber shell does not bear the axial load, and needs to pass other test assessments, which makes the development cycle longer, time-consuming and laborious

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