A water-cooled adjustable compensation hot cathode device

Abstract

The invention discloses a water-cooled adjustable compensation hot cathode device. The device includes a water-cooled electrode installed on the central axis of the multi-electrode, a position adjusting device for adjusting the position where the water-cooled electrode extends into the multi-electrode, and a rotary air intake device installed at the front of the water-cooled electrode. The lanthanum tungsten electrode in this device is inserted into the center of the multiple electrodes, and the electrode cooling is realized through the water cooling device connected by the tail seal. The cylinder cooperates to realize the rotary shunting of high-pressure argon. Under the combined effects of water cooling, argon protection and arc burning, the front surface of the lanthanum tungsten electrode has a good current carrying capacity in a large temperature range below 3000 °C, which can improve the shunting capacity of multiple electrodes under high pressure, and realize Chip arc heaters have high voltage, high current, and long-term stable operation, and are suitable for heat protection tests.

Description

technical field [0001] The invention belongs to the technical field of aerodynamic heat-resistant ground test equipment for aerospace vehicles, and in particular relates to a water-cooled adjustable compensation hot cathode device. Background technique [0002] At present, with the rapid development of hypersonic flight technology, the ground heat protection test assessment of the thermal protection system of hypersonic aircraft has put forward higher and higher requirements for the operation capability of arc heating equipment. Chip arc heater is one of the important heating equipments to realize high-power, high-enthalpy, long-term ground heat-proof test and assessment; chip arc heater is composed of nozzle, front and rear electrodes, several water-cooled annular compression sheets, intake ring And insulators assembled in series, the arc connects the front and rear electrodes, and restricts the tubular channel through the tangential air intake between the compression plate...

AI Technical Summary

Problems solved by technology

However, when the total pressure of the traditional laminated multi-electrode is above 1.7MPa, due to the high-voltage accumulation effect of the arc, it cannot effectively shunt the large current load, which limits the simulation range of the total pressure of the chip arc heater.

The high-voltage multi-electrode is improved on the basis of the traditional laminated multi-electrode. By using the combination of the shape changes in the electrode sheet, the distance between the discharge area of ​​different electrodes and the core arc can be adjusted, which can broaden the total pressure simulation range of the arc heater. However, as the inner diameter of the tail electrode piece decreases, the excitation effect of the electromagnetic field decreases, the arc rotation speed decreases, and the current carrying capacity and life of the electrode piece will decrease, which limits the high-voltage multi-electrode high-current operation capability.

Images