A propellant management device for use in a propellant tank

Abstract

A novel propellant management device used in a propellant storage box comprises a central supporting column, flow guide blades, supporting column blades, large blades, liquid storage blades, an upper pressing plate, an upper mesh, an upper supporting plate, small cylinders, a framework, a lower pressing plate, a lower mesh and a lower supporting plate, wherein the flow guide blades, the supporting column blades and the large blades are all fixedly mounted on the central supporting column in the radial direction to form an integral structure, the integral structure is fixedly mounted on the upper pressing plate through the central supporting column, the supporting column blades and the large blades are mounted in the same plane, and a mounting plane of each flow guide blade and a mounting plane of each large blade form a certain included angle; the liquid storage blades are fixedly mounted on the upper pressing plate in the radial direction; the upper pressing plate, the upper mesh, the upper supporting plate, the small cylinders, the middle framework, the lower pressing plate, the lower mesh and the lower supporting plate are sequentially fixedly mounted from top to bottom to form the integral structure, namely, a liquid accumulation assembly. The novel propellant management device has the inhibition function on shaking of liquid, performs comprehensive management on propellants and is simple in structure, high in strength and reliability and large in liquid storage capacity, the on-orbit work application range is large, the on-orbit liquid discharge speed is high, and meanwhile, repeated large-flow filling on the ground can be realized.

Description

technical field [0001] The invention relates to a propellant management device used in a propellant tank, in particular to a novel propellant management device used in a propellant tank with the function of suppressing liquid sloshing, belonging to the field of propulsion in space vehicles. Background technique [0002] Propellant tanks are widely used in various space vehicles such as satellites, spaceships, space stations, and launch vehicles due to their high reliability and long life in a weightless environment. The core technology of the propellant tank is its internal propellant management device (referred to as PMD). The ability to manage PMD is a key indicator of tank performance. The goal of the PMD design is for the PMD to deliver liquids reliably and without air bubbles at all times. [0003] At present, most of the PMDs of the propellant tanks used in my country's space vehicles, especially satellites, are mesh-type, and the screen is used as a capillary elemen...

AI Technical Summary

Problems solved by technology

However, with the continuous development of the space industry, the limitations of this type of propellant management device have gradually emerged, which has become an unfavorable factor restricting the development of my country's satellite industry

Mesh PMD has the following disadvantages: For example, the capillary mesh structure has low strength, is easy to be damaged, easy to be polluted, and has low reliability. At the same time, complex fluid transmission channels need to be set up, resulting in a large weight of the propellant management device and slow filling speed

[0006] For example, a propellant management device is described in US4553565A, which mainly includes guide vanes distributed radially perpendicular to the inner wall of the storage tank and a liquid accumulator composed of some radially evenly placed vanes, through which the gas-liquid The interface is effectively separated, in which the guide vane is mainly used to guide the liquid, and the accumulator is mainly used to store the liquid. Small, under some possible extreme working conditions (such as large axial rotational angular velocity of the tank, large reverse acceleration or large lateral acceleration, etc.), it is impossible to ensure sufficient liquid storage volume without air inclusion;

[0007] A propellant management device is described in US4986398A, which mainly includes guide vanes distributed parallel to the inner wall of the storage tank and a liquid accumulator composed of inner and outer cones and upper and lower collector assemblies, wherein the guide vanes are mainly used to guide liquid Function, the accumulator realizes liquid storage with the help of a conical structure area, its disadvantages are: the effect of inhibiting liquid sloshing is very small, more screens are used, and the liquid flow that the accumulator can provide is relatively small;

[0008] A propellant management device is described in US5279323A, which mainly includes V-shaped guide vanes distributed radially vertically on the inner wall of the storage tank and an accumulator composed of some radially evenly placed blades, in the lower hemisphere of the storage tank Set up anti-sloshing partitions and set a layer of screen near the liquid outlet of the storage tank. The disadvantages are: the structure is complex, more screens are used, and the effect of inhibiting liquid sloshing is small. Only in a small part of the lower hemisphere of the storage tank The area plays a certain role in inhibiting liquid sloshing;

[0009] A propellant management device is described in ZL200920223125.5, which is mainly composed of blades and support columns. Under extreme working conditions (such as large axial rotational angular velocity of the storage tank, large reverse acceleration or large lateral acceleration, etc.), it is easy to have a cut-off phenomenon

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