Detachable umbrella disc

Abstract

The invention provides a detachable umbrella disc structure. A circular table is defined through alternated connection of three umbrella sections a and three umbrella sections B. The circular table is provided with a through hole in the axial direction, and the through hole is matched with a core die. According to the shape of the umbrella sections A on the bottom face of the circular table, the inner arc length is larger than the outer arc length. According to the shape of the umbrella sections B on the bottom face of the circular table, the inner arc length is smaller than the outer arc length. After the circular table is defined by the umbrella sections a and the umbrella sections B, the umbrella sections a and the umbrella sections B are coaxially bonded to the position, corresponding to grain stress concentration, on the charging core die. By means of the detachable umbrella disc structure, the stress level of a solid rocket engine charging structure can be reduced, a stress releasing structure is achieved, on the premise that the charging structure filling fraction is guaranteed, the stress level of the charging structure can meet the requirement for the integrity of a low-temperature work structure of an engine, and the problem about integrity of the engine low-temperature work charging structure is solved.

Description

technical field [0001] The invention relates to a charge structure stress releasing device of a solid rocket motor. Background technique [0002] The structural integrity of the high M-number charge structure design of solid rocket motors has become a design problem, especially the low temperature structural integrity. The application of the stress release structure of the engine charge in foreign countries is relatively early, and the corresponding technology is relatively mature. Generally, the oblique annular groove structure is used to divide the charge column into sections. The stress release structure in foreign countries is mainly through mechanical processing, pre-embedded ablation It can be realized by removing the device. However, limited by the level of technology and propellant materials in China, there is a serious lack of molding technology for the stress release structure of the charge. The detachable umbrella plate structure is an important technology to re...

AI Technical Summary

Problems solved by technology

At present, there is no report in China that the detachable umbrella plate device is used to realize the stress relief structure. By adopting the detachable umbrella plate structure, the charge stress release structure can be realized, and the high performance and strong adaptability of the engine can be realized, which lays the foundation for the design and shaping of the engine charge. technical foundation

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