Ultralow-temperature and ultralow-vibration friction testing device

Abstract

The invention discloses an ultralow-temperature and ultralow-vibration friction testing device, which comprises a helium liquefying mechanism, a friction mechanism and a storage tank, wherein the helium liquefying mechanism comprises a first vacuum hood and a first cold shield arranged in the first vacuum hood; a refrigerator penetrates through the first vacuum hood; a first-level heat exchanger and a second-level heat exchanger connected with a liquid conveying pipe are arranged on the refrigerator; the first-level heat exchanger and the second-level heat exchanger are positioned in the firstcold shield; the friction mechanism comprises a second vacuum hood, a second cold shield and an insulating bracket; the second cold shield and the insulating bracket are arranged in the second vacuumhood; the second vacuum hood is connected below the first vacuum hood; a liquid helium cavity is formed in the second cold shield; an exit of the liquid conveying pipe is formed in the liquid heliumcavity; an upper sample support is arranged on the outer bottom wall of the second cold shield; a movable displacement platform is arranged on the insulating bracket; a lower sample support is arranged on the displacement platform; the upper sample support and the lower sample support face each other up and down; the storage tank is connected with the first-level heat exchanger through a gas supplementing pipe and connected with the liquid helium cavity through a gas return pipe. According to the invention, a friction test of a sample can be realized in an environment with ultrahigh vacuum degree and ultralow temperature.

Description

technical field [0001] The invention relates to the technical field of refrigeration and low-temperature engineering, in particular to an ultra-low temperature and ultra-low vibration and friction testing device, more specifically an ultra-low temperature and ultra-low vibration and friction testing device capable of simulating an ultra-high vacuum environment. Background technique [0002] With the rapid development of aerospace technology, the ultra-high vacuum of outer space (usually refers to the pressure in 10 -9 Vacuum below mBar) and ultra-low temperature (physically refers to the temperature below -263°C) are more and more widely used in the environment. In order to study the friction and lubrication working state of materials under this environmental condition, it is necessary to provide ultra-low temperature, ultra-low Vibration, ultra-high vacuum working environment and friction device, however, there is currently no friction device specifically for this working e...

AI Technical Summary

Problems solved by technology

[0002] With the rapid development of aerospace technology, the ultra-high vacuum of outer space (usually refers to the pressure in 10 -9 Vacuum below mBar) and ultra-low temperature (physically refers to the temperature below -263°C) are more and more widely used in the environment. In order to study the friction and lubrication working state of materials under this environmental condition, it is necessary to provide ultra-low temperature, ultra-low Vibration, ultra-high vacuum working environment and friction device, however, there is no friction device specifically for this working environment

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