Skirt structure and upper skirt method of solid rocket motor case

Abstract

The invention relates to a skirt structure of a solid rocket motor casing, a skirt assembly tool, and a skirt upper method, wherein the skirt structure includes at least two skirt petals, and the circumferential side of each skirt petal is provided with a circumferential connection structure; The circumferential connection structures of two adjacent skirt petals are used together, and they resist each other along the circumferential direction, so that multiple skirt petals are connected to form a ring-shaped skirt structure; the skirt assembly tool includes a positioning flange and a number of flanges surrounding the center of the positioning flange. Tooling assembly with evenly spaced axes. During installation, the skirt assembly tooling and skirt structure can be assembled directly around the mandrel without removing the solid rocket motor shell preform from the winding equipment to complete the upper skirt work. The present invention can process multiple skirt petals at the same time, and can complete the work of putting on the skirt without transferring the solid rocket motor casing prefabricated multiple times, with less difficulty in production and installation and high efficiency; compared with the existing one-piece annular skirt, the present invention The rigidity of the skirt structure formed by connecting a plurality of skirt petals is improved.

Description

technical field [0001] The invention relates to the field of solid rocket motor manufacturing, in particular to a skirt structure of a solid rocket motor shell, a skirt assembly tool, and a skirt upper method. Background technique [0002] The skirt structure is an important structural part for the external connection of the solid rocket motor, which connects the solid rocket motor with the interstage section and the tail section as a whole. Generally, the skirt structure of the solid rocket motor is an integral ring structure with an "L"-shaped rotary section, which is inserted into the winding layer of the solid rocket motor casing by means of adhesive bonding. In order to facilitate the connection between the skirt structure and the solid rocket motor casing and to coordinate the deformation, the connection area between the skirt structure and the solid rocket motor casing is a variable thickness structure, and several strip-shaped through grooves are evenly distributed i...

AI Technical Summary

Problems solved by technology

[0003] With the improvement of rocket carrying capacity requirements, solid rocket motors are gradually becoming larger, and the existing technology has the following limitations in practical application: 1) The forming of large-scale overall skirts needs to rely on large-scale equipment, which is difficult, time-consuming and costly; 2) When installing a large overall skirt, the fiber-wound solid rocket motor shell preform that has been wound on the winding mandrel before being skirted must be removed from the winding equipment, placed on the winding mandrel assembly bracket for skirting, and then Place the winding mandrel after the upper skirt is completed on the winding equipment, continue to complete the skirt outer hoop layer winding, and then cure

This method needs to transfer the mandrel with large volume and weight many times, which is difficult and risky

Moreover, due to the limitation of space and the weight of the mandrel, it is necessary to install extension shafts and multiple conversion support points when winding the skirt on the mandrel assembly bracket. The process is complex and difficult; 3) The skirt bonding of the large solid rocket motor shell The size of the area is large, the matching with the shell is difficult to control, and the bonding quality is reduced

Images