Open AccessRadial error motion of porous gas bearings: theoretical modelling and experimental validation
Author(s) -
Steven Cappa,
Dominiek Reynaerts,
Farid AlBender
Publication year - 2014
Publication title -
sustainable construction and design
Language(s) - English
Resource type - Journals
eISSN - 2295-9092
pISSN - 2032-7471
DOI - 10.21825/scad.v4i2.1040
Subject(s) - bearing (navigation) , work (physics) , reynolds equation , porosity , equations of motion , mechanics , porous medium , boundary value problem , computer science , mechanical engineering , classical mechanics , physics , reynolds number , engineering , mathematics , mathematical analysis , geotechnical engineering , artificial intelligence , turbulence
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.