Metal propellant storage tank for spaceflight and manufacturing method thereof

Abstract

The invention provides a metal propellant storage tank for spaceflight. The metal propellant storage tank for the spaceflight comprises a shell 1 and a metal diaphragm 2. The shell comprises a gas circuit joint 3, an upper semisphere 4, a connecting ring 5, a lower semisphere 6 and a liquid circuit joint 7, wherein the upper semisphere 4 and the lower semisphere 6 are connected through the connecting ring 5, the gas circuit joint 3 is connected with the upper semisphere 4, the liquid circuit joint 7 is connected with the lower semisphere 6, and the metal diaphragm 2 is in butt joint with the connecting ring 5. The overall shell 1 is made of the scandium aluminum magnesium alloy materials whose brand type is 5B70. The metal diaphragm 2 is made of pure aluminum. The invention further provides a manufacturing method of the metal propellant storage tank for the spaceflight. The metal propellant storage tank for the spaceflight solves the problems that the propellant storage tank is large in quality and low in structural efficiency, realizes the light design of the propellant storage tank, effectively reduces the weight of the storage tank, and greatly reduces the launch cost of a vehicle.

Description

technical field [0001] The invention relates to the technical field of aerospace pressure vessels, in particular to a metal propellant storage tank for aerospace and a manufacturing method thereof. Background technique [0002] The propellant tank is a medium and low pressure pressure vessel with a liquid management device, designed for liquid attitude control power systems. The key issues of this kind of product are: on the one hand, it must have the ability to effectively manage liquids under space microgravity conditions (gas-liquid isolation); on the other hand, it must be able to withstand the mechanical environment, thermal Environmental assessment. [0003] Commonly used propellant tank management devices include surface tension, metal diaphragms and non-metallic diaphragms. A large number of strategic and tactical missile models and space vehicles at home and abroad use metal diaphragm tanks as the tanks of their propulsion systems. The main feature of the metal d...

AI Technical Summary

Problems solved by technology

[0004] At present, the domestic aluminum alloy metal diaphragm storage tank shells are all made of aluminum alloy 5A06. With the development of propulsion system technology, the requirements for the weight index of the storage tank are getting higher and higher. The traditional aluminum alloy (such as 5A06) can no longer meet the storage requirements. The lightweight design requirements of storage tanks, the use of new materials is one of the ways to solve the lightweight design of storage tanks

[0005] The invention patent of European Publication No. EP0941925A2 discloses a propellant tank, but this invention only provides the basic configuration of the metal diaphragm tank, and fails to solve the problem of lightweight design of the product

[0006] The invention patent of Chinese Patent Publication No. CN102275067 discloses a method for processing and preparing a hemispherical metal tank for spacecraft fuel. The method provides a method for manufacturing a titanium material metal diaphragm, which is easy to control the quality. Titanium thin plate is used as a preparation material, and the cost is high

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