Tank transition ring and propellant tank

Abstract

The invention relates to the field of liquid rocket tanks, and specifically provides a tank transition ring and a propellant tank. The transition ring of the storage tank is used for the docking of the tank bottom and the cylinder section. The transition ring is a ring structure, which includes a straight section and a curved section integrally connected. One end of the curved section is connected to the tank bottom, and the other end is connected to the tank bottom. The inner wall of the straight section is connected, and the inner wall of the curved section is provided with an inner beam extending toward the inner side of the transition ring. There is a turning point where the hoop stress changes from tensile stress to compressive stress on the curved section. The beam is located close to the turning point. The storage tank transition ring of the invention has high structural reliability, high deformation coordination ability, high functional integration, easy assembly and docking in the later stage, wide structural adaptability and strong practicability.

Description

technical field [0001] The invention relates to the field of liquid rocket tanks, in particular to a tank transition ring and a propellant tank. Background technique [0002] The stability design of the launch vehicle tank structure is an important issue to be considered in the tank engineering design. For thin-shell structures, when the membrane stress is compressive and reaches a certain level, overall or local buckling of the structure may occur. As a typical thin-shell structure, the external pressure at the bottom of the tank is unstable and the axis of the cylinder section is unstable. The problem of pressure instability has been widely concerned by engineering designers, and domestic and foreign rockets have adopted corresponding anti-instability measures, but there are few studies on the problem of internal pressure instability at the bottom of the tank. However, for some bottom shapes such as large modulus ellipsoidal box bottoms, the local hoop stress in the trans...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the technical problem that the traditional storage tank transition ring cannot provide the hoop stiffness to resist the hoop compression stress, which easily leads to structural instability and deformation, the present invention provides a storage tank transition that effectively enhances the ring stiffness and thus improves the stability of the storage tank. ring

[0006] At the same time, in order to solve the technical problem that the traditional storage tank has poor circumferential stiffness and is prone to produce circumferential folds under the action of coupled loads, the present invention provides a propellant storage tank with good structural stability and suitable for different load environments

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