Sandwiched composite heat insulating layer structure and preparation method thereof

Abstract

The invention provides a sandwiched composite heat insulating layer structure and a preparation method thereof. The preparation method comprises the following steps of: pasting a heat insulating layer, an ablation resistant layer and a transition layer in an engine combustion chamber housing, wherein the heat insulating layer and the transition layer are made of a heat insulating layer material ofan ethylene-propylene-diene monomer system, the ablation resistant layer is made of a carbon fiber phenolic aldehyde butyronitrile rubber soft sheet material, and the ablation resistant layer is divided into a plurality of pieces in a peripheral direction in the engine combustion chamber housing; and performing hot-pressing after pasting each layer, pre-drying the material of the ablation resistant layer before use, and curing a carbon rough board of the ablation resistant layer and the heat insulating layer before pasting the transition layer. The sandwiched composite heat insulating layer structure can improve integrity of the composite heat insulating layer, and strengthens reliability of a composite interface.

Description

technical field [0001] The invention relates to a heat-proof structure and technology in a combustion chamber of a solid rocket motor, which is mainly used in the important heat-proof parts of the combustion chamber of a pulse engine, an end-fired charge engine, and a high-overload, high-ablation engine. Background technique [0002] The heat-proof materials in the combustion chamber of solid rocket motors generally use EPDM rubber and nitrile rubber as a single heat-insulating material and a composite heat-insulating layer of carbon fiber fabric / rubber system. [0003] The single rubber insulation material is mainly suitable for engines with inner hole combustion and low ablative erosion. Its structure is simple, and the traditional process of sheet bonding, molding preforming and bonding can be realized, but the anti-ablation performance has certain limitations. , For engines with high requirements for anti-ablation, the only way to ensure the heat-resistant performance of...

AI Technical Summary

Problems solved by technology

During the working process of the engine, the three-dimensional overall structure of the carbon mesh improves the anti-ablation and erosion performance of the composite insulation layer. Small molecular gas will flow at the interface between the carbon mesh and the heat insulation layer, and the interface between the carbon mesh and the heat insulation layer will detach and cause structural defects, which will affect the reliability of the carbon mesh against ablation

Images