FEEDING SYSTEM OF AEROSTATIC BEARINGS WITH POROUS MEDIA

抄録

This study is an experimental investigation on porous media in feeding system of aerostatic bearings. The experiments were conducted using sintered bronze cylindrical inserts of different length, diameter and particle size. The work outlines two types of experiments namely: a) the measurement of mass flow rate through single porous resistance with different upstream and downstream pressures; b) the study of pressure distribution, on a pneumatic pad featuring porous resistance feeding system. The set-up used for the former included the device under test, a flow regulator and pressure transducers. For the latter the set-up included the pad under test and a stationary bearing member under the pad to evaluate pressure distribution by means of a pressure transducer.
The immediate objective of the work is to define a fluid porous resistance to be provided on the pad, equivalent to that of a 0.25 mm calibrated orifice already applied to a similar pad.