Thermal radiation positive electrode structure for cleaning condensation products of iodine working medium on electric thruster

Abstract

The invention provides a thermal radiation positive electrode structure for cleaning condensation products of an iodine working medium on an electric thruster. The thermal radiation positive electrodestructure comprises an electromagnet, a conductor, thermal radiation plates, a slide bushing, contacts and a ferromagnetic ring, wherein a positive electrode of the electric thruster is sleeved withthe slide bushing; the slide bushing is sleeved with the ferromagnetic ring; an insulating interlayer is arranged on the positive electrode of the electric thruster in front of the electromagnet; theinsulating interlayer is sleeved with the conductor; head parts of the thermal radiation plates are hinged to head parts of the positive electrode of the electric thruster; tail parts of the thermal radiation plates are hinged to the contacts through connecting rods; the contacts are fixed to a back end face of the slide bushing; a spring is arranged on the positive electrode of the electric thruster between the insulating interlayer and the slide bushing; and in a power-on state, the electromagnet generates magnetism to attract the ferromagnetic ring to move along the axis of the positive electrode of the electric thruster, the contacts are in communication with the conductor, and the thermal radiation plates are driven to rotate around joints with the head parts of the positive electrodeof the electric thruster through the connecting rods, so that the thermal radiation area is enlarged. Through adoption of the thermal radiation positive electrode structure, the condensation productsof the iodine working medium on an air supplying channel and a discharging channel of the positive electrode of the electric thruster are cleaned without affecting the working performance of the electric thruster.

Description

Technical field [0001] The invention belongs to the technical field of space electric propulsion technology and solid working fluid residue removal of electric thrusters, and in particular relates to a heat radiation anode structure for removing condensation products of iodine working fluid electric thrusters. Background technique [0002] At present, with the emergence of new space missions such as gravitational wave detection, traditional chemical propulsion has become increasingly difficult to meet mission requirements, thus promoting the development of space electric propulsion, a new type of propulsion technology. Electric propulsion usually uses xenon as the thruster working medium because of its low ionization energy and relatively large atomic mass. However, because it is a gas at normal temperature and pressure, it needs high-pressure storage to increase the carrying capacity of the working fluid, which leads to a very complicated decompression system and increases the v...

AI Technical Summary

Problems solved by technology

The condensed iodine will firstly cause the reduction of iodine participating in the ionization process, which will increase the error of the iodine vapor flow rate in the experimental data. Secondly, the electric thruster will specially design the geometry of the anode gas supply channel and discharge channel to increase the efficiency of the thruster. Condensation on both will cause a change in geometry such that the geometry is no longer ideal, and eventually the condensed iodine may react with the anode, shortening anode life

[0004] There is no way to remove the iodine condensed on the gas supply channel and discharge channel of the anode of the electric thruster

Images