Articles

Radial error motion of porous gas bearings: theoretical modelling and experimental validation

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Abstract

Gas bearings are part of many modern (precision) machines. Machine spindles, measurement machines, lithography machines and motion systems are only a few examples that incorporate gas bearings. In analysing the accuracy of such machines or systems, it is convenient to represent the characteristics of gas bearings. The present paper describes a method for analysing the radial error motion of porous gas journal bearings. An orbit model for porous gas journal bearings, based on the time-dependent boundary-slip Reynolds equation, the continuity equation (derived from Darcy’s law) and the equations of motion, is developed and validated experimentally. Experiments show that the orbit model proposed in this work is accurate to the nanometre level.

Keywords: aerostatic porous journal bearing, radial error motion, orbit model, error separation technique

How to Cite:

Cappa, S., Reynaerts, D. & Al-Bender, F., (2014) “Radial error motion of porous gas bearings: theoretical modelling and experimental validation”, International Journal of Sustainable Construction and Design 4(2). doi: https://doi.org/10.21825/scad.v4i2.1040