Charged winding stress release device

Abstract

The invention discloses a charged winding stress release device which resolves the problems that an engine works abnormally or even shuts down when the charging is subjected to winding stress in the winding process. The charged winding stress release device is composed of a mould core, a front check ring, a rear check ring, a front clamping groove, a rear clamping groove, a front positioning ring, a rear positioning ring and throat hoops, wherein the front positioning ring and the rear positioning ring are arranged in the front clamping groove and the rear clamping groove respectively to form two independent positioning tools and hooped tightly through the throat hoops, the front and rear positioning tools are arranged at the two ends of the charging respectively, and the mould core is inserted and positioned through the front and rear check rings. The charged winding stress release device is suitable for releasing the stress generated in the charged winding process of a screwing star hole.

Description

technical field [0001] The invention relates to a stress release device, in particular to a propellant winding stress release device, which is suitable for the winding of a propellant non-metallic shell. Background technique [0002] In the solid propellant engine manufacturing process, compared with the traditional process of winding the shell first and then casting the propellant, the new process of winding with grains saves the necessary core mold tooling and core mold production in the traditional process. It is relatively simple; it is light in weight and low in cost compared with the steel shell, and it is a promising engine shell manufacturing method. Now a small number of rain-enhancing rockets in China use this method to manufacture engine shells. The current generation of rain-enhancing rocket charge adopts screw-pressed double lead-2 propellant. This type of propellant has high strength and high hardness and is suitable for the winding process with the charge. The...

AI Technical Summary

Problems solved by technology

The current generation of rain-enhancing rocket charge uses screw-pressed double lead-2 propellant. This type of propellant has high strength and high hardness and is suitable for the winding process with charge. The specific winding process is that the two ends of the charge are supported by core rods and fastened with nuts. , due to the good strength of this type of propellant, the winding stress and the tightening force of the nut have little influence on it, but the energy of the double-lead-2 propellant is low and the range is relatively short, so the use of screw pressure modified double-base propellant is currently proposed. The propellant replaces the double-lead-2 propellant to increase the range of the engine, but the strength of the modified double-base propellant is poor. If the original winding method is used directly, the winding stress on the charge will be too large. It is found that the winding stress makes the propellant Changes in the ballistic performance of the agent will cause the engine to work abnormally, or even disintegrate

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