High-low-temperature box penetrating shaft gas sealing device and application

Abstract

The invention discloses a high-low-temperature box penetrating shaft gas sealing device and application, and particularly relates to a sealing device suitable for a space environment simulation box penetrating shaft of spaceflight ground simulation equipment. The gas sealing device comprises a transmission shaft, a gas sealing sleeve, a gasket, a gas sealing flange, a high-low-temperature box and gas supply equipment. The gas sealing sleeve, the gasket and the gas sealing flange are installed on the transmission shaft (1) in a sleeving mode. The transmission shaft penetrates through the high-low-temperature box and is connected with the equipment in the box, and the gas supply equipment is connected with an input hole of the gas sealing sleeve through a gas conveying pipe. The gas sealing device has the advantages of being simple in structure, and ensuring the dew point temperature in the high-low-temperature box and the cleanness, friction is avoided, and pollution to the environment box is avoided; meanwhile, the gas sealing device can be used for sealing a rotating shaft and an axial moving shaft, the rotating speed and the axial moving speed of the transmission shaft are not limited, and the gas sealing device can seal the transmission shaft of axial motion, and is suitable for gas sealing of various speed processes from the low speed to the high speed.

Description

technical field [0001] The invention relates to a gas sealing device for a shaft passing through a high and low temperature box and its application, in particular to a sealing device suitable for a shaft passing through a box passing through a space environment simulation box of aerospace ground simulation equipment. Background technique [0002] The ground simulation device of aerospace equipment needs to simulate the environment in space as much as possible - high and low temperature environment chamber, especially the humidity in space, frictionless transmission parts in microgravity, high cleanliness environment, etc. If the traditional shaft sealing ring is used or sealed by liquid oil, on the one hand, the dew point temperature inside the high and low temperature box cannot be guaranteed; on the other hand, once worn or leaked, the cleanliness inside the high and low temperature environment box will be destroyed; on the other hand, , the test results are distorted by t...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the deficiencies of the prior art, the present invention provides a high and low temperature box penetrating box shaft gas sealing device, which can not only solve the problems of friction and easy leakage between the gasket and the liquid oil seal, but also because it is non-contact, there is no friction loss and no leakage. Reduce the rotation accuracy of the drive shaft without producing any pollution and ensure a high cleanliness of the environment

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