Multi-nozzle solid attitude control engine blocking cover structure

Abstract

The invention provides a multi-nozzle solid attitude control engine blocking cover structure. The blocking cover is mainly composed of a spraying pipe clamping ring, a piston and sealing rings, the control device for opening the opening pressure design value of a spray pipe plug cover is mainly used for changing machining materials of the piston, geometrical parameters and structural forms; and according to the selected machining materials, the geometrical parameters and the structural form of the piston, the opening pressure of the novel spray pipe plug cover can be predicted through structural calculation. Meanwhile, the spray pipe plug cover can solve the problems that a small-size conventional spray pipe plug cover used for a special spray pipe is difficult to machine and the discretedegree of the opening pressure is large. The connection mode of the spray pipe plug cover and a spray pipe assembly can be selected but not limited to threaded connection, pin connection and clampingkey connection mode. According to the multi-nozzle solid attitude control engine blocking cover structure, the accurate control of the opening pressure of the nozzle cover of the spray pipe is realized by means of the mature structure calculation, the test amount is reduced, the product performance reliability is improved, and the design cost is saved.

Description

technical field [0001] The invention relates to a multi-nozzle solid attitude control engine blocking structure. Background technique [0002] During the ignition process of the solid rocket motor, the main charge needs to be ignited reliably under the specified pressure. In order to realize the pressure build-up in the combustion chamber, a nozzle plug needs to be installed at the nozzle. At the initial stage of ignition of the ignition powder, the nozzle plug and the combustion chamber form a closed cavity, and the pressure in the combustion chamber gradually increases. After the main charge is ignited, the pressure in the combustion chamber further increases. When the pressure is high, the nozzle cap is opened, and the engine works normally to generate thrust. Depending on the operating environment, the formula of the main charge of the engine is different, and the sensitivity of the ignition performance to the opening pressure of the nozzle plug is different. If the ope...

AI Technical Summary

Problems solved by technology

Depending on the operating environment, the formula of the main charge of the engine is different, and the sensitivity of the ignition performance to the opening pressure of the nozzle plug is different. If the opening pressure is too low, ignition failure may occur; if the opening pressure is too high, ignition may occur The pressure peak exceeds the maximum design pressure of the engine casing, resulting in the overall failure of the engine

[0003] Most of the nozzle caps of the conventional nozzles of solid rocket motors are fixed with the nozzle by glue. Although this connection method is simple, the glue connection method is greatly affected by factors such as the environment and the amount of glue used. The disadvantage of large dispersion of opening pressure. At the same time, if the geometric size of the nozzle of the solid rocket motor, especially the solid attitude and orbit control engine, is small, the processing and manufacturing of conventional nozzle plugging is difficult.

The opening pressure of the existing nozzle plug needs to be determined through a large number of tests, which additionally increases the design cost

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