Solid carrier rocket sub-stage capable of being recycled and reused

Abstract

The invention discloses a solid carrier rocket sub-stage capable of being recycled and reused. The solid carrier rocket sub-stage comprises a sub-stage body, an inflatable heat protection structure and a solid rocket engine; the inflatable heat protection structure comprises a front-end airbag which covers the windward side of a front cabin section under an expanding state and is in a shape of a rotating body, and the front-end airbag comprises a flexible heat-insulating layer and a heat-proof coating which are sequentially arranged from inside to outside; and the solid rocket engine comprisesa combustion chamber shell with a cavity allowing a grain to be placed, and a combustion chamber heat protection structure is arranged on the inner wall of the combustion chamber shell. By adopting the inflatable heat protection structure with heat protection, deceleration and buffering combined, the front-end airbag can maintain the good aerodynamic shape, the sub-stage is not damaged due to pneumatic heating and large landing impact force in the reentry process, and can be recycled, through re-charging, replacing of disposable parts and the like of the rocket engine, the sub-stage and the engine thereof can be reused, and thus the launching cost of a solid carrier rocket is lowered.

Description

technical field [0001] The invention relates to the technical field of spacecraft return, in particular to a recoverable and reusable solid launch vehicle sub-stage. Background technique [0002] In the early stage of launch vehicle development, in order to achieve the goal of smooth launch, all aerospace countries do not care about the cost. With the development of aerospace technology, various aerospace countries have gradually begun to consider the issue of launch costs, and low-cost launches have become the development trend of space transportation systems. The reuse of launch vehicles can achieve "multiple use and cost sharing", which is one of the main ways to reduce the cost of space launch. The development of sub-stage recovery technology is the basis for realizing the reuse of launch vehicles. [0003] The vertical landing and recovery of sub-stages of SpaceX's "Falcon" 9 liquid launch vehicle has become the norm. However, due to the high cost of engine propellant...

AI Technical Summary

Problems solved by technology

[0008] Therefore, the technical problem to be solved by the present invention is to overcome the problem that the sub-stage of the solid launch vehicle and its engine in the prior art cannot be recovered and reused, thereby providing a recoverable and reusable solid launch vehicle sub-stage

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