Iodine working medium electric propulsion storage and supply system based on sonic nozzle flow control

Abstract

The invention discloses an iodine working medium electric propulsion storage and supply system based on sonic nozzle flow control. The system comprises a control module, a square iodine storage tank, an iodine storage tank pressure sensor, a switch self-locking valve, a pressure regulating gas capacitor, a pressure regulating gas capacitor pressure sensor, a sonic nozzle assembly, a cathode supply pipeline and an anode supply pipeline. The square iodine storage tank, the switch self-locking valve, the pressure regulating gas capacitor and the sonic nozzle assembly are sequentially connected through a pipeline; the cathode outlet of the sonic nozzle assembly is connected with the cathode supply pipeline, and the anode outlet is connected with the anode supply pipeline; the pressure regulating gas capacitor pressure sensor is mounted on a pipeline between the pressure regulating gas capacitor and the sonic nozzle assembly; a pressure regulating gas capacitor heater covers the outer surface of the pressure regulating gas capacitor; and a pipeline temperature control module is coated on pipeline parts except the square iodine storage tank and the pressure regulating gas capacitor. According to the invention, the modular design of the iodine working medium electric propulsion storage and supply system is facilitated, the cost is reduced, and the system reliability and the accurate flow control capability in a high-temperature environment are improved.

Description

technical field [0001] The invention relates to the technical field of space electric propulsion, in particular to an iodine propellant electric propulsion storage and supply system based on sonic nozzle flow control. Background technique [0002] In recent years, iodine working medium electric propulsion system has gradually become the electric propulsion technology favored by commercial small satellite platforms. Compared with the traditional xenon working medium electric propulsion system, the iodine working medium propulsion system has high storage density and low price, and has its unique advantages in the field of commercial satellites. [0003] The iodine working medium electric propulsion storage and supply system is a system that stores solid iodine and supplies iodine vapor to the electric thruster at a precise flow rate. The system stores solid iodine in a storage tank. When the propulsion system works, the solid iodine needs to be sublimated into iodine vapor by...

AI Technical Summary

Problems solved by technology

In terms of iodine working medium supply, the proportional control valve is a moving part that moves frequently, and contains non-metallic materials inside. Its long-term working reliability is low in high-temperature environments and the possibility of condensation of iodine particles.

The flow rate controlled by the thermal throttle valve is affected by the upstream pressure, downstream pressure and iodine vapor temperature at the same time, and there are problems such as slow response and complicated control rate in control.

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