Electric rotating table under vacuum low-temperature environment

Abstract

The invention discloses an electric rotating table under vacuum low-temperature environment. The electric rotating table mainly comprises a rotating table bracket, a rotating table moving disk, a rotating table fixed disk, a main shaft, a motor, a flexible shaft, a bevel gear transmission mechanism, a conducting ring, a thermal protection device, a wall penetrating sealing unit and a control system. According to the electric rotating table disclosed by the invention, a driving motor is placed outside a space environment simulation chamber, the power is transmitted into the simulation chamber by a metal bellows in the wall penetrating sealing unit, and the flexible shaft is used for being coupled with the main shaft of the rotating table in the simulation chamber, so that the continuous rotation of the rotating table is realized, and an electricity supply channel and a testing signal transmission channel are provided for a tested product placed on the rotating table through the conducting ring; and the control system is connected with the conducting ring through a wall penetrating connector, and is used for supplying electricity to the product and acquiring a testing signal and a signal of a rotating table sensor, and adjusting the output power of the motor to control the rotating speed and the positioning angle of the rotating table.

Description

technical field [0001] The invention belongs to the field of spacecraft ground tests, and in particular relates to an electric turntable used in vacuum thermal environment tests, which can provide adjustable constant rotation speed, power supply and signal transmission channels for tested products. Background technique [0002] With the rapid development of my country's aerospace industry, the demand for vacuum thermal tests of spacecraft or aircraft is getting higher and higher, and the complexity of the tests is getting higher and higher. When the spacecraft is in orbit, the position and direction of the earth relative to the sun are constantly changing, so the external heat flow reaching the surface of the star is also constantly changing with the flight of the spacecraft; most of the aircraft is in the form of spin when flying in orbit , the influence of external heat flow is related to its rotation attitude. [0003] Space-borne large and medium-sized antennas are inst...

AI Technical Summary

Problems solved by technology

[0007] However, the interior of the space environment simulation room is a high-vacuum, deep-cold environment, and ordinary electric turntables cannot work normally in this environment. It is necessary to design an electric turntable that can withstand low temperature and vacuum environments, and ensure that the normal operation of the space environment simulation room is not damaged. Finally, this electric turntable is used to provide an attitude simulation platform for spacecraft or aircraft, and by simplifying the heating method of infrared cage or infrared lamp array for external heat flow simulation, it not only ensures the real simulation of flight attitude during the thermal test process, but also reduces the number of tests. Supporting tooling can effectively carry out ground tests at the lowest cost

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