Because of their distinctive characteristics, aerostatic bearings are particularly suitable for high-precision applications. However, because of the compressibility of the lubricant, this kind of bearing is characterized by low relative stiffness and poor damping. Compensation methods represent a valuable solution to these limitations. This paper presents a design procedure for passively compensated bearings controlled by diaphragm valves. Given a desired air gap height at which the system should work, the procedure makes it possible to maximize the stiffness of the bearing around this value. The designed bearings exhibit a quasi-static infinite stiffness for load variation ranging from 20% to almost 50% of the maximum load capacity of the bearing. Moreover, the influence of different parameters on the performance of the compensated pad is evaluated through a sensitivity analysis

Design and Analysis of an Aerostatic Pad Controlled by a Diaphragm Valve / Colombo, Federico; Lentini, Luigi; Raparelli, Terenziano; Trivella, Andrea; Viktorov, Vladimir. - In: LUBRICANTS. - ISSN 2075-4442. - ELETTRONICO. - 9:5(2021), p. 47. [10.3390/lubricants9050047]

Design and Analysis of an Aerostatic Pad Controlled by a Diaphragm Valve

Federico Colombo;LUIGI LENTINI;Terenziano RAPARELLI;Andrea Trivella;Vladimir Viktorov
2021

Abstract

Because of their distinctive characteristics, aerostatic bearings are particularly suitable for high-precision applications. However, because of the compressibility of the lubricant, this kind of bearing is characterized by low relative stiffness and poor damping. Compensation methods represent a valuable solution to these limitations. This paper presents a design procedure for passively compensated bearings controlled by diaphragm valves. Given a desired air gap height at which the system should work, the procedure makes it possible to maximize the stiffness of the bearing around this value. The designed bearings exhibit a quasi-static infinite stiffness for load variation ranging from 20% to almost 50% of the maximum load capacity of the bearing. Moreover, the influence of different parameters on the performance of the compensated pad is evaluated through a sensitivity analysis
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2900360