Collector heat dissipation structure for radiant cooling type space traveling-wave tube

Abstract

The invention discloses a collector heat dissipation structure for a radiant cooling type space traveling-wave tube. A collector comprises a collector electrode, an insulating porcelain plate and a collector outer cylinder; the collector electrode is a cylinder; a plurality of insulating porcelain plates are uniformly fixed on the outer cylindrical surface; and the collector outer cylinder surrounds the cylindrical surface of the collector electrode, the inner wall of the collector outer cylinder is provided with fixing grooves in one-to-one correspondence with the insulating porcelain plates,the heat dissipation structure comprises a plurality of O-shaped rings and a heat radiator surrounding the collector outer cylinder, the outer circumference of the collector outer cylinder is uniformly and fixedly provided with the plurality of O-shaped rings, and the outer edge of each O-shaped ring is fixed on the inner wall of the heat radiator. The structure is simple, the mechanical resistance is high, the reliability is good, the process realizability is good, and the working requirement of the long-life space traveling-wave tube can be met.

Description

technical field [0001] The invention relates to a collector heat dissipation structure for a radiation-cooled space traveling wave tube. Background technique [0002] The outer space environment in which space traveling wave tubes work is very harsh. When the communication satellite faces the sun, the temperature reaches hundreds of degrees Celsius, and when it faces away from the sun, the temperature drops to more than minus 50 degrees Celsius. It also has to withstand the continuous bombardment of various high-energy particles in the universe. . Space traveling wave tubes, like various electronic devices carried on satellite platforms, must meet the requirements of high efficiency, reliability, and long life. If the heat generated by the traveling wave tube cannot be dissipated in a timely and effective manner, it will cause a high temperature rise of the traveling wave tube itself. The collector is the main heat-generating part of the traveling wave tube. From the colle...

AI Technical Summary

Problems solved by technology

If the heat generated by the traveling wave tube cannot be dissipated in a timely and effective manner, it will cause a high temperature rise of the traveling wave tube itself. The collector is the main heat-generating part of the traveling wave tube. From the collector, if the temperature of the collector is too high, part of the heat flow will be transferred back to the high-frequency structure of the traveling wave tube, which will eventually affect the reliability and stability of the tube, and cause a certain degree of damage to its power output, efficiency and life. destroy

For example, when the temperature of the collector reaches 500°C, a large amount of electrode materials in the collector will easily evaporate to the ceramic insulating connector, thereby reducing the insulation between the high-frequency structure and the collector, and in severe cases, it may cause a short circuit; It may damage the seal of the packaging part and pollute the energy transmission device, resulting in shortened or damaged traveling wave tube life; too high collector temperature may also cause more secondary electrons to overflow and accelerate bombardment to the high-voltage electrode, resulting in collector efficiency reduce

If the temperature of the high-frequency structure is too high, the thermal stress may exceed the safe operating area, causing physical damage to the interacting circuit

For example, the rupture of the helix will cause an open circuit for the slow wave interaction, and the rupture of the clamping rod will cause small disturbances in the slow wave structure, both of which can cause the TWT to fail.

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