Influence of Temperature Effect on the Static and Dynamic Performance of Gas-Lubricated Microbearings

Gas-lubricated microbearings are widely applied in multiple fields due to their advantages of high-speed, low friction level and other features. The operating environment of microbearings is complex, and the difference of temperature has an important influence on their comprehensive performance. In...

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Bibliographic Details
Published in:Micromachines (Basel) 2020-07, Vol.11 (8), p.716
Main Authors: Li, Liangliang, Liu, Zhufeng, Wang, Chongyu, Xie, Yonghui
Format: Article
Language:English
Subjects:
dynamic limit performance
Dynamic stability
Finite element method
Fluids
Gas lubrication
gas-lubricated microbearings
High temperature
Numerical analysis
Physical properties
Pressure distribution
rarefaction effect
Researchers
static and dynamic characteristics
temperature
Temperature effects
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Summary:Gas-lubricated microbearings are widely applied in multiple fields due to their advantages of high-speed, low friction level and other features. The operating environment of microbearings is complex, and the difference of temperature has an important influence on their comprehensive performance. In this investigation, FEM (finite element method) is employed to investigate the static, dynamic and limit characteristics of microbearings lubricated by different kinds of gas at different temperatures. The results show that the rise of temperature leads to the decline of equivalent viscosity of gas, which weakens the load capacity of microbearings, and furthermore, affects the operating stability of microbearings. The dynamic performances of microbearings at different temperatures are very different, and the two dynamic limit characteristics are more sensitive to temperature when it changes.
ISSN:2072-666X
2072-666X
DOI:10.3390/mi11080716