Nozzle rubber cover of missile engine

Abstract

The invention relates to an assembly structure capable of effectively improving the opening pressure of a nozzle rubber cover, and discloses a creative double-layer or multi-layer cloth-inserted rubber cover capable of effectively improving and stabilizing opening pressure. The rubber cover comprises a throat lining, a rubber layer and a cloth-inserted layer, is shaped like a bowl and is bonded with the throat lining through 730 glue at a convergent section. Two or more layers of inserted cloth are buried in the middle of the rubber layer so as to achieve reinforcement, the rubber layer is made of nitrile rubber materials, and the inserted cloth of the cover is butyronitrile oil-resistant rubber cloth. By means of the scheme, on the basis of keeping an original cover processing mold unchanged, the strength of a cover body is improved by increasing the number of layers of the inserted cloth, so that change of the design scheme of the cover is completed in a short period. The scheme is tested in experiments, the nozzle rubber cover of the missile engine is reasonable, simple, safe and reliable in structure, and a creative design concept and technical accumulation are provided for research of the nozzle cover.

Description

technical field [0001] The present invention proposes an innovative double-layer or multi-layer cloth-clad rubber plug that can effectively increase the opening pressure of the rubber plug. The strength is strengthened so that the modification of the plug can be completed in a short period of time, which greatly saves the development cost and time. Background technique [0002] The nozzle plug is a component of the solid rocket motor. Its main function is to quickly build up the ignition pressure of the engine, shorten the ignition delay time, and have a major impact on the ignition of the engine. In addition, the plug also plays a role in the internal cavity of the engine, especially It is the sealing, moisture-proof and dust-proof function of the propellant in the combustion chamber. The opening pressure of the nozzle plugging cover is low, which can increase the ignition delay time and the energy loss of the ignition powder. In severe cases, the engine may stall; if th...

AI Technical Summary

Problems solved by technology

If the thickness of the rubber in the center layer of the plugging cap is increased, the plugging mold needs to be modified or re-opened for processing. The manufacturing cycle is long and the cost is high, and due to the superelastic properties of rubber and the nonlinear relationship between the thickness and strength of the rubber plugging cap , multiple rounds of adjustments to the rubber thickness are required to determine the final state

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