Low-cost ablation-resistant embedded spray pipe and processing method thereof

Abstract

The low-cost ablation-resistant embedded spray pipe is provided with an internal spray pipe channel and comprises a rotary shell, the shell is provided with a convergent section and an expansion section, an expansion protection layer is arranged on the inner wall of the expansion section, the end, away from an opening, of the expansion section extends to form the convergent section, and a convergent fixed shell 15 is further arranged on the outer wall of the joint of the convergent section and the expansion section. Backing is arranged on the inner wall of the convergence section; a convergence protection layer is arranged between the side, close to the convergence section, of the convergence fixing shell 15 and the outer wall of the expansion section, a first ablation-resistant layer and a second ablation-resistant layer are sequentially arranged on the backing from outside to inside, and a blocking cover is arranged between the first ablation-resistant layer and the second ablation-resistant layer and completely blocks an internal spray pipe channel. The invention further provides a machining method of the low-cost ablation-resistant embedded spray pipe. The using amount of metal materials is reduced, the weight is reduced compared with a traditional mode, the ablation resistance of the submerged nozzle is improved, the machining process difficulty of the ablation layer is simplified, and the cost of the nozzle is saved.

Description

technical field [0001] The invention relates to the field of rocket nozzles, in particular to a low-cost ablation-resistant embedded nozzle and a processing method thereof. Background technique [0002] Nozzle is a device for energy conversion of solid rocket motors. Its main function is to control the mass flow rate of gas through the throat area of ​​the nozzle, so as to keep the gas pressure in the combustion chamber at a predetermined level, and to ensure the normal combustion of the charge and the combustion of the propellant. The expansion of the product is accelerated, and its thermal energy is fully converted into the kinetic energy of the gas, and the reaction thrust is obtained through the high-speed ejection of the gas. Among them, the cost of the nozzle accounts for about 22%-26% of the total cost of the engine, of which raw materials account for 13%-14% and working hours 9%-12%. Obviously, optimizing the nozzle design structure is of great significance to reduc...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the defect of high nozzle cost in the prior art, the invention provides a low-cost ablation-resistant embedded nozzle and its processing method, which are simple to manufacture and low in cost

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