Hydraulic accumulator for propellant tank in spacecraft

Abstract

The invention discloses a hydraulic accumulator for a propellant tank in a spacecraft. The hydraulic accumulator comprises an air guide tube, a cover plate, an outer shell, blades, a support column, a base, channel window pressing plates, a channel window meshes, hydraulic accumulator meshes, a fixing block and hydraulic accumulator mesh pressing plates, wherein the blades are uniformly distributed on and fixed to the support column in the radial direction to form a whole structure, and the whole structure is mounted on and fixed to a circular partition plate in the base; the hydraulic accumulator meshes are pressed on the circular partition plate in the base through the hydraulic accumulator mesh pressing plates and then fixed; the channel window meshes are pressed on the outer side of a cylinder wall of the base through the channel window pressing plates and then fixed; the outer shell is fixed at the top end of the base, the cover plate is fixed on the outer shell, and the air guide tube is fixed on the cover plate through the fixing block. The hydraulic accumulator disclosed by the invention is simple in structure, high in strength and reliability, large in liquid storage quantity and wide in work application range, has the function of repeatedly and circularly filling liquids to the hydraulic accumulator and discharging the liquids from the hydraulic accumulator, is large in liquid filling and discharging rate, and meanwhile has the capacity of realizing ground repeated filling.

Description

technical field [0001] The invention relates to a liquid accumulator for space fluid management, especially suitable for propellant storage tanks 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, the PMDs of the propellant storage tanks used in space vehicles, especially satellites, are all mesh-type, and the screen is used as a capillary element to collect the propellant, and the propellant is transported to the liquid port of the propellant storage tank by the pipeline. . Th...

AI Technical Summary

Problems solved by technology

The limitations of this type of propellant management device have also gradually emerged, becoming an unfavorable factor restricting the development of the 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

For example, a liquid accumulator is described in US4553565A, wherein the storage of liquid and the separation of the gas phase and the liquid phase are realized by means of some radially evenly placed blades. (such as large axial rotational angular velocity of the storage tank, large reverse acceleration or large lateral acceleration, etc.) cannot guarantee sufficient liquid storage without entrainment

Also described in DE10040755A1 is a liquid accumulator similar to a spherical crown. An inner cone-shaped plate is arra...

Images